CN101957690B - Optical touch device and operation method thereof - Google Patents
Optical touch device and operation method thereof Download PDFInfo
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- CN101957690B CN101957690B CN2009101600384A CN200910160038A CN101957690B CN 101957690 B CN101957690 B CN 101957690B CN 2009101600384 A CN2009101600384 A CN 2009101600384A CN 200910160038 A CN200910160038 A CN 200910160038A CN 101957690 B CN101957690 B CN 101957690B
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Abstract
The invention discloses an optical touch device, comprising a light source transmitting module, an optical module, a photosensing module and a processing module, wherein the optical module and the photosensing module are respectively arranged around one surface of the optical touch device; the light source transmitting module sequentially transmits scanning light which is uniformly distributed above a direct scanning area of the surface according to the time sequence; when an object forms a touch point on the surface, the object stops the scanning light and reflecting light formed by the optical module to reflect the scanning light; the photosensing module generates the sensing result according to the condition for receiving the scanning light and the reflecting light; and the processing module is used for judging the position of the touch point according to the time sequence and the sensing result. The invention also provides a method for operating the optical touch device. The optical touch device and the operation method thereof can ensure that a light source transmitter can effectively cover the whole possible touch point falling area at the limited rotating angle.
Description
Technical field
The present invention relates to contactor control device, particularly a kind of light emitted device that can make can effectively cover the optical touch-control device and the operation method thereof in the possible touch point drop point zone of full wafer under the limited anglec of rotation.
Background technology
Generally speaking, comparatively common touch-control device includes types such as electric resistance touch-control device, capacitive touch device and optical touch-control device at present, carries out the detection of single or multiplex touch control point through difference detection principle and mode.In above-mentioned various dissimilar touch-control devices, optical touch-control device is owing to have the good characteristic of light transmission, become to be different from traditional electric resistance touch-control device and another common technology outside the capacitive touch device.
Yet; Traditional optical formula contactor control device must be provided with many light emitted devices and optical receiver to carry out the detection of touch point around panel; This will cause whole front panel device additional space demand; Make its volume further to dwindle, add that its production cost is considerable, also can't reach high-resolution touch control detection.Recently, though there is the people that triangle location survey method is applied in the optical touch technology, to carry out the detection of touch point.Though can improve the resolution of touch-control input through this mode, and can reduce the quantity of light emitted device and optical receiver, but still can't solve the problem of additional space demand, and bring complicated calculations and frame reflection bar to need problems such as accurate location on the contrary thereupon.
Though have optical touch-control device to realize that high-resolution touch point detects at present, effectively to address the above problem through optical modules such as rotary light source transmitter, lightguide and photo switches, photo sensors.Yet; This optical touch-control device is provided with the cost of lightguide except the extra increase of needs; Its rotary light source transmitter still need rotate quite large-scale angle so that scan light can contain the whole area in touch point drop point zone possible on the panel fully; Cause the operating frequency when this optical touch-control device is actual to carry out the touch point interpretation also not ideal enough, demand urgently overcoming.
Therefore, the present invention proposes a kind of optical touch-control device and operation method thereof, to address the above problem.
Summary of the invention
The present invention proposes a kind of optical touch-control device and operation method thereof.First specific embodiment according to the present invention is a kind of optical touch-control device.In this embodiment, optical touch-control device comprises light source emitting module, optical module, optical sensing module and processing module.Optical module and optical sensing module are arranged at respectively around the surface of optical touch-control device.Light source emitting module is launched the scan light of the direct scanning area top that is distributed in this surface equably in proper order likes according to sequential (time sequence).When object formed touch point on this surface, object will block scan light and the formed reflected light of optical module reflective scan light.Optical sensing module will receive scan light and catoptrical reception situation generation sensing result based on it.Processing module is judged the position of touch point according to sequential and sensing result.
According to optical touch-control device of the present invention; In one embodiment; Comprise: light source emitting module; Be used for launching the multiple tracks scan light in proper order, so that this multiple tracks scan light is distributed at least one direct scanning area top on a surface of this optical touch-control device equably according to sequential likes; First optical module, be arranged at this surface around, be used to reflect this multiple tracks scan light to form multiple tracks first reflection light; First optical sensing module; Be arranged at this surface around; When object forms touch point on this surface; This object will block at least one scan light and at least one first reflection light in this multiple tracks first reflection light in this multiple tracks scan light respectively under different time, this first optical sensing module produces sensing result according to the reception situation that it receives this multiple tracks scan light and this multiple tracks first reflection light; And processing module, be coupled to this light source emitting module and this first optical sensing module, be used for judging that according to this sequential and this sensing result this touch point is in this lip-deep position.
According to optical touch-control device of the present invention; Wherein, This light source emitting module is the rotary light source transmitter, and this surface is divided into this at least one direct scanning area and at least one indirect scanning zone according to the size of the anglec of rotation covering scope of this this multiple tracks scan light of light source emitting module emission.
According to optical touch-control device of the present invention, wherein, sequential is relevant with the sequencing of this this multiple tracks scan light of light source emitting module emission.
According to optical touch-control device of the present invention; Wherein, In this sequential; This light source emitting module is respectively at first scan light, second scan light and the 3rd scan light in the very first time, second time and this multiple tracks scan light of the 3rd time emission, this very first time early than this second time and this second time early than the 3rd time.
According to optical touch-control device of the present invention, wherein, between the very first time and this second time and the time interval that has equal length between this second time and the 3rd time, this time interval is preset value or is set by the user.
According to optical touch-control device of the present invention, wherein, first optical module is one of them that is selected from the group of being made up of reflective optical system, light reflection/sensor, rotatable reflective optical system, a plurality of miniature rotatable reflective optical system and removable rotation reflective optical system.
According to optical touch-control device of the present invention; Wherein, First optical module and this first optical sensing module are arranged at first side and second side on this surface respectively, this first side and this second side against each other and this second side than this first side near this light source emitting module.
According to optical touch-control device of the present invention; In one embodiment; Further comprise: second optical module, be arranged at the 3rd side that is different from this first side and this second side on this surface, be used to reflect this multiple tracks first reflection light to form multiple tracks reflected light for the second time; And second optical sensing module; Be arranged at the 4th side that is different from this first side, this second side and the 3rd side on this surface; When this object forms this touch point on this surface; This object will block the reflected light for the second time of at least one in this at least one scan light, this at least one first reflection light and this multiple tracks reflected light second time respectively under different time, this first optical sensing module and this second optical sensing module receive the for the second time catoptrical reception situation of this multiple tracks scan light, this multiple tracks first reflection light and this multiple tracks according to it and produce this sensing result.
According to optical touch-control device of the present invention, wherein, second optical module is one of them that is selected from the group of being made up of reflective optical system, light reflection/sensor, rotatable reflective optical system, a plurality of miniature rotatable reflective optical system and removable rotation reflective optical system.
According to optical touch-control device of the present invention; In one embodiment; Further comprise second optical module and the 3rd optical module; Be arranged at the 3rd side and the 4th side that are different from this first side and this second side on this surface respectively; Be used to reflect this multiple tracks first reflection light to form multiple tracks reflected light for the second time; When this object formed this touch point on this surface, this object blocked the reflected light for the second time of at least one in this at least one scan light, this at least one first reflection light and this multiple tracks reflected light second time, and this first optical sensing module receives the for the second time catoptrical reception situation of this multiple tracks scan light, this multiple tracks first reflection light and this multiple tracks according to it and produces this sensing result.
According to optical touch-control device of the present invention; Wherein, second optical module and the 3rd optical module are for being selected from one of them in the group of being made up of reflective optical system, light reflection/sensor, rotatable reflective optical system, a plurality of miniature rotatable reflective optical system and removable rotation reflective optical system respectively.
Second specific embodiment according to the present invention is a kind of optical touch-control device operation method.This optical touch-control device comprises light source emitting module, optical module, optical sensing module and processing module, and optical module and optical sensing module be arranged at respectively optical touch-control device a surface around.In this embodiment, at first, light source emitting module is launched the scan light of the direct scanning area top that is distributed in this surface equably in proper order likes according to sequential.When object formed touch point on this surface, this object will block scan light and the formed reflected light of optical module reflective scan light.Then, optical sensing module will receive scan light and catoptrical reception situation generation sensing result based on it.At last, this processing module is promptly judged the position of this touch point according to this sequential and this sensing result.
Method based on operation optical touch-control device of the present invention; In one embodiment; This optical touch-control device comprises light source emitting module, first optical module, first optical sensing module and processing module; This first optical module and this first optical sensing module be arranged at respectively this surface around; This method comprises the following step: this light source emitting module is launched the multiple tracks scan light in proper order according to sequential likes, so that this multiple tracks scan light is distributed at least one direct scanning area top on a surface of this optical touch-control device equably; When object forms touch point on this surface; This object blocks at least one scan light and at least one first reflection light in the multiple tracks first reflection light in this multiple tracks scan light respectively under different time, wherein this multiple tracks first reflection light is by this first optical module this multiple tracks scan light of reflection and form; This first optical sensing module produces sensing result based on the reception situation that it receives this multiple tracks scan light and this multiple tracks first reflection light; And this processing module judges that based on this sequential and this sensing result this touch point is in this lip-deep position.
According to the method for the invention; Wherein, This light source emitting module is the rotary light source transmitter, and this surface is divided into this at least one direct scanning area and at least one indirect scanning zone according to the size of the anglec of rotation covering scope of this this multiple tracks scan light of light source emitting module emission.
According to the method for the invention, wherein, sequential is relevant with the sequencing of this this multiple tracks scan light of light source emitting module emission.
According to the method for the invention; In one embodiment; This optical touch-control device further comprises second optical module and second optical sensing module; This first optical module, this first optical sensing module, this second optical module and this second optical sensing module are arranged at first side, second side, the 3rd side and the 4th side on this surface respectively, and this method further comprises the following step: this this multiple tracks first reflection light of second optical module reflection is to form multiple tracks reflected light for the second time; When this object formed this touch point on this surface, this object blocked the reflected light for the second time of at least one in this at least one scan light, this at least one first reflection light and this multiple tracks reflected light second time respectively under different time; And this first optical sensing module and this second optical sensing module receive the for the second time catoptrical reception situation of this multiple tracks scan light, this multiple tracks first reflection light and this multiple tracks according to it and produce this sensing result.
According to the method for the invention; In one embodiment; This optical touch-control device further comprises second optical module and the 3rd optical module; This first optical module, this first optical sensing module, this second optical module and the 3rd optical module are arranged at first side, second side, the 3rd side and the 4th side on this surface respectively, and this method further comprises the following step: this second optical module and this multiple tracks first reflection light of the 3rd optical module reflection are to form multiple tracks reflected light for the second time; When this object formed this touch point on this surface, this object blocked the reflected light for the second time of at least one in this at least one scan light, this at least one first reflection light and this multiple tracks reflected light second time; And this first optical sensing module receives this sensing result of the for the second time catoptrical reception situation generation of this multiple tracks scan light, this multiple tracks first reflection light and this multiple tracks according to it.
Can further be understood through following detailed Description Of The Invention and accompanying drawing about advantage of the present invention and spirit.
Description of drawings
Fig. 1 illustrates the functional block diagram according to the optical touch-control device of first specific embodiment of the present invention.
Fig. 2 (A)～(D) illustrates the synoptic diagram of the second multi-form optical module.
Fig. 3 (A) illustrates when light source emitting module and begins to rotate to θ by 0 °
1And emission scan light time in regular turn, object forms touch point P in its scanning area II
1Synoptic diagram; Fig. 3 (B) illustrates when light source emitting module and begins to rotate to θ by 0 °
1And emission scan light time in regular turn, object forms touch point P in its scanning area I
2Synoptic diagram.
Fig. 4 (A)～(D) illustrate respectively when light source emitting module by θ
1Be scanned up to θ
2The time, object forms different touch point P
3, P
4, P
5And P
6Synoptic diagram.
Fig. 5 illustrates when light source emitting module and rotates to θ by 0 °
1The time, differentiate the different touch point P that are positioned at scanning area II equally
AAnd P
BSynoptic diagram.
Fig. 6 (A) and (B) illustrate optical touch-control device of the prior art suffer from can't interpretation the situation of pair touch points.
Fig. 7 (A) and (B) illustrate optical touch-control device of the present invention effectively solve Fig. 6 (A) and (B) in can't interpretation the difficult problem of two touch points.
Fig. 8 illustrates the process flow diagram according to the optical touch-control device operation method of second specific embodiment of the present invention.
Embodiment
Optical touch-control device proposed by the invention and operation method thereof can effectively cover the possible touch point drop point zone of full wafer, the accuracy that therefore can increase operating frequency and improve interpretation touch point drop point site under the limited anglec of rotation of light emitted device.
First specific embodiment according to the present invention is a kind of optical touch-control device.In this embodiment, this optical touch-control device is used for carrying out through the mode of optics the sensing and the interpretation work of the drop point site of touch point.Please with reference to Fig. 1, Fig. 1 illustrates the functional block diagram of this optical touch-control device.
As shown in Figure 1, optical touch-control device 1 comprises light source emitting module 10, first optical module 12, first optical sensing module 14, second optical module 16, second optical sensing module 18 and processing module 20.Wherein first optical module 12, first optical sensing module 14, second optical module 16 and second optical sensing module 18 are arranged at the first different side, second side, the 3rd side and the 4th side around the surface of optical touch-control device 1 respectively, but not as limit; Processing module 20 is coupled to light source emitting module 10, first optical sensing module 14 and second optical sensing module 18.
In practical application, first optical module 12 and second optical module 16 are not equally to be lightguide as prior art, but adopt the device with reflected light function.For example; Like Fig. 2 (A) to shown in Fig. 2 (D); Second optical module 16 can be single reflective optical system, single rotatable reflective optical system, a plurality of miniature rotatable reflective optical system, the single light reflection/sensor that movably rotates reflective optical system or have reflection and sensing function simultaneously, does not have certain restriction.The situation of first optical module 12 is also identical, does not therefore give unnecessary details in addition.
In this embodiment, light source emitting module 10 is rotary light emitted device, is used for launching the multiple tracks scan light through the mode of rotation in proper order according to certain sequential likes.In fact, this sequential is relevant with the sequencing of light source emitting module 10 these multiple tracks scan light of emission.For example; In this sequential; Suppose light source emitting module 10 respectively at very first time T1, second time T 2 and the 3rd time T 3 emission first scan light, second scan light and the 3rd scan light, wherein very first time T1 early than second time T 2 and second time T 2 early than the 3rd time T 3.If all have the time interval Δ t that equates between very first time T1 and second time T 2 and between second time T 2 and the 3rd time T 3, and should time interval Δ t can be preset value or set by the user.That is to say that light source emitting module 10 is launched first scan light, second scan light and the 3rd scan light according to this sequential since the per interval interval of delta t of very first time T1 in regular turn.Therefore, in this embodiment, an important evidence the when optical touch-control device really 1 of the scan light shooting sequence that this sequential comprised carries out the interpretation of touch point drop point.
Next, elder generation is described with regard to the situation of the single touch point of optical touch-control device 1 interpretation.Please with reference to Fig. 3 (A), Fig. 3 (A) illustrates when light source emitting module 10 and begins to rotate to θ by 0 °
1And emission scan light time in regular turn, object forms touch point P in its scanning area II
1Synoptic diagram.In this embodiment, because light source emitting module 10 rotates to θ by 0 °
1So 10 multi-strip scanning light of launching in regular turn of light source emitting module will be distributed in scanning area II top equably.Shown in Fig. 3 (A), as light source emitting module 10 emission scan light L
1The time, though scan light L
1Can directly not be positioned at touch point P
1Object block but first optical module, 12 reflective scan light L
1Formed first reflection light RL
1Promptly can be stopped and can't be received by this object by first optical sensing module 14.
Afterwards, as light source emitting module 10 emission scan light L
2The time, scan light L
2Will directly be stopped by this object, therefore, scan light L
2Can't be emitted to first optical module 12, also can't be reflected onto first optical sensing module 14 certainly.As for light source emitting module 10 at 0 ° to θ
1Other scan light of being launched in the scope is not because these scan light can stop by this object, so all can reflected and received by first optical sensing module 14 by first optical module 12.
In this embodiment and since light source emitting module 10 at 0 ° to θ
1In the multi-strip scanning light of launching in regular turn according to this sequential institute in the scope, scan light L is only arranged
1And L
2Reflected light can't be received by first optical sensing module 14, first optical sensing module 14 promptly receives situation according to this and produces sensing result and sensing result is sent to processing module 20.Because light source emitting module 10 is scanned up to θ by 0 °
1And first optical sensing module 14 can't receive two corresponding to scan light L
1And L
2Reflected light, therefore, processing module 20 can judge according to this that touch point P should be positioned at scanning area II, and its accurate location is arranged in the P of Fig. 3 (A)
1The point place.In fact, processing module 20 can be tried to achieve the corresponding relation of photoemissive sequential of scanning and touch point position through inquiring about the preset table of comparisons, but not as limit.
Then, please with reference to Fig. 3 (B), Fig. 3 (B) illustrates when light source emitting module 10 and begins to rotate to θ by 0 °
1And emission scan light time in regular turn, object forms touch point P in its scanning area I
2Synoptic diagram.Shown in Fig. 3 (B), because light source emitting module 10 only rotates to θ by 0 °
1So, form touch point P
2This object and can't directly stop any scan light that light source emitting module 10 is launched, this object only can stop first optical module, 12 reflective scan light L
3Formed first reflection light RL
3
That is to say, light source emitting module 10 at 0 ° to θ
1In the multi-strip scanning light of launching in regular turn according to this sequential institute in the scope, scan light L is only arranged
3Reflected light RL
3Can't be received by first optical sensing module 14, first optical sensing module 14 promptly receives situation according to this and produces sensing result and sensing result is sent to processing module 20.Because light source emitting module 10 is scanned up to θ by 0 °
1And first optical sensing module 14 only can't receive one corresponding to scan light L
3Reflected light RL
3, therefore, processing module 20 can be judged touch point P according to this
2Should be positioned at scanning area I, and its accurate location should be arranged in the P of Fig. 3 (B)
2The point place.
In like manner, Fig. 4 (A) to (D) illustrate respectively when light source emitting module 10 by θ
1Be scanned up to θ
2The time, object forms different touch point P
3, P
4, P
5And P
6Synoptic diagram.Wherein, form touch point P
3Object except directly stopping the scan light L that light source emitting module 10 is sent
1Also can stop first optical module, 12 reflective scan light L outward,
2Formed reflected light RL
2As for forming touch point P
4And P
5Object; Owing to be not positioned at the scope that light source emitting module 10 scans; So can't directly stop arbitrary road scan light that light source emitting module 10 is sent, and only can stop the reflected light that first optical module 12 or second optical module 16 reflect to form.In addition, form touch point P
6Object then only can directly stop one scan light that light source emitting module 10 is sent, and can not stop the reflected light that first optical module 12 or second optical module 16 are reflected.Because its touch point interpretation principle and above-mentioned similar content, can the rest may be inferred, thereby do not give unnecessary details separately at this.It should be noted that working as light source emitting module 10 rotates to θ by 0 °
2Till; Can contain all possible touch point drop point zone; And the angle of its scanning is half the not as good as of the prior art; Also promptly under same sweep speed, light source emitting module 10 run-down required times of the present invention are half the not as good as of the prior art, so can significantly improve interior scanning times (also being sweep frequency) of unit interval.
Please with reference to Fig. 5, Fig. 5 illustrates when light source emitting module 10 and rotates to θ by 0 °
1The time, differentiate the different touch point P that are positioned at scanning area II equally
AAnd P
BSynoptic diagram.As shown in Figure 5, when light source emitting module 10 rotates to θ by 0 °
1The time, suppose that object A and object B form touch point P down respectively at different time
AWith touch point P
BThough, form touch point P
AObject A and formation touch point P
BThe scan light that object B is directly stopped is scan light L
C, but the reflected light that object A and object B are stopped and inequality is respectively reflected light R
AWith R
BWherein, reflected light R
ABe first optical module, 12 reflective scan light L
AAnd get; Reflected light R
BBe first optical module, 12 reflective scan light L
BAnd get.In the sequential of light source emitting module 10 emission scan light, because scan light L
AShooting sequence early than scan light L
BTherefore, processing module 20 can be judged the different touch point P that are positioned at scanning area II equally respectively according to this sequential
AAnd P
BDefinite position.Above-mentionedly be collinear in situation with scan light for different touch points; Be collinear in catoptrical situation as for different touch points; Because the scan light that these touch points directly stopped respectively is different; Processing module 20 can be according in the sequential of light source emitting module 10 emission scan light, and the shooting sequence of these scan light is successively told the position difference between these touch points.
After having inquired into the interpretation situation of single touch point, next, with the interpretation situation of further inquiring into multi-touch.As shown in Figure 5, even object A and object B form touch point P down respectively at different time
AWith touch point P
BThough object A and object B all are positioned at scan light L
CBe emitted on the path of first optical module 12, but, be respectively reflected light R because object A is also different with the reflected light that object B is stopped
AWith R
BSo processing module 20 still can be told touch point P according to this
AWith touch point P
BBetween position difference, and be unlikely to have the thing of touch point erroneous judgement to take place.
Please with reference to Fig. 6 (A) and Fig. 6 (B), Fig. 6 (A) and Fig. 6 (B) illustrate optical touch-control device of the prior art suffer from can't the two touch points of interpretation situation.For optical touch-control device 7, no matter be the touch point P shown in Fig. 6 (A)
D1And P
D2Or the touch point P ' shown in Fig. 6 (B)
D1And P '
D2All can cause optical receiver 75～78 not receive the light that optical transmitting set 71～74 is launched separately, thereby produce identical sensing result, the drop point situation that causes traditional optical formula contactor control device 7 also can't differentiate actual touch spots is touch point P actually
D1And P
D2, or touch point P '
D1And P '
D2
This difficult problem that can solve prior art effectively and faced through optical touch-control device proposed by the invention 1.Shown in Fig. 7 (A), when formed two touch points of object are respectively P
D1And P
D2The time, form touch point P
D2Object will stop first optical module, 12 reflective scan light L
D1Formed first reflection light RL
D1And directly stop the scan light L that light source emitting module 10 is launched
D2As for forming touch point P
D1Object then only can stop first optical module, 12 reflective scan light L
D3Formed first reflection light RL
D3
On the other hand, shown in Fig. 7 (B), if object forms two touch point P '
D1And P '
D2, form touch point P '
D2Object will stop first optical module, 12 reflective scan light L
D4Formed first reflection light RL
D4And directly stop the scan light L that light source emitting module 10 is launched
D5As for forming touch point P '
D1Object then only can stop first optical module, 12 reflective scan light L
D6Formed first reflection light RL
D6
Comparison diagram 7 (A) and Fig. 7 (B) can know, clearly, because scan light L
D1And be not equal to scan light L
D4, also be first reflection light RL
D1And be not equal to first reflection light RL
D4, also have scan light L
D2Also be not equal to scan light L
D5So optical touch-control device 1 can be told touch point P effectively according to the sequential of light source emitting module 10 these scan light of emission
D2With P '
D2In like manner, because scan light L
D3And be not equal to scan light L
D6, also be first reflection light RL
D3And be not equal to first reflection light RL
D6So optical touch-control device 1 can be told touch point P effectively according to the sequential of light source emitting module 10 these scan light of emission
D1With P '
D1Therefore, the optical touch-control device 1 of the present invention's proposition can improve the phenomenon generation that traditional optical formula contactor control device 7 can't be differentiated the drop point of actual touch spots effectively.
Second specific embodiment according to the present invention is a kind of optical touch-control device operation method.In this embodiment, this optical touch-control device comprises light source emitting module, first optical module, first optical sensing module, second optical module, second optical sensing module and processing module.Wherein, this first optical module, this first optical sensing module, this second optical module and this second optical sensing module are arranged at this lip-deep first side, second side, the 3rd side and the 4th side respectively, but not as limit.Please with reference to Fig. 8, Fig. 8 illustrates the process flow diagram of this optical touch-control device operation method.
As shown in Figure 8, in step S10, this light source emitting module is launched the multiple tracks scan light in proper order according to sequential likes, so that this multiple tracks scan light is distributed at least one direct scanning area top on this surface equably.In practical application; This light source emitting module is the rotary light source transmitter, and this surface is divided into this at least one direct scanning area and at least one indirect scanning zone (for example first reflection scanning area or the zone of reflective scan for the second time) according to the size of the anglec of rotation covering scope of this this multiple tracks scan light of light source emitting module emission.In addition, this sequential is relevant with the sequencing of this this multiple tracks scan light of light source emitting module emission.
Then; In step S12; When object forms touch point on this surface; This object blocks at least one scan light in this multiple tracks scan light, at least one first reflection light in the multiple tracks first reflection light and the multiple tracks reflected light for the second time of at least one in the reflected light for the second time respectively under different time, wherein this multiple tracks first reflection light and for the second time reflected light reflect this multiple tracks scan light by this first optical module and this second optical module respectively and form.Then, in step S14, this first optical sensing module receives the for the second time catoptrical reception situation of this multiple tracks scan light, this multiple tracks first reflection light and this multiple tracks based on it and produces sensing result.At last, in step S16, this processing module judges that based on this sequential and this sensing result this touch point is in this lip-deep position.
Compared to prior art; Because can be through being arranged at the assistance of panel optical unit on every side with reflection function according to optical touch-control device of the present invention; Make that its rotary light source module does not need equally to rotate the drop point zone that sizable angular range is contained all possible touch point on the panel as prior art; Can contain the regional whole area of touch point drop point possible on the panel and only need rotate less than original half the angular range; So this optical touch-control device can provide flyback retrace more frequently in the unit interval, with the accuracy that increases its operating frequency and improve its interpretation touch point drop point site.
Through the detailed description to above preferred embodiment, hope can be known description characteristic of the present invention and spirit more, and is not to come scope of the present invention is limited with the above-mentioned preferred embodiment that is disclosed.On the contrary, its objective is that hope can be contained various changes and identity property is arranged in the scope of claim of the present invention.
The main element symbol description
S10～S16: process step 75～78: optical receiver
1,7: optical touch-control device 10: light source emitting module
14: the first optical sensing modules of 12: the first optical modules
18: the second optical sensing modules of 16: the second optical modules
20: processing module θ
1, θ
2: the anglec of rotation
I, II: scanning area 71～74: optical transmitting set
P
1～P
6, P
A～P
C, P
D1～P
D2, P '
D1～P '
D2: touch point
L
1～L
3, L
A～L
C, L
D1～L
D6: scan light
RL
1, RL
2, RL
3, RL
D1, RL
D3, RL
D4, RL
D6: first reflection light
R
A, R
B: reflected light.
Claims (11)
1. optical touch-control device comprises:
Light source emitting module is used for launching the multiple tracks scan light in proper order according to sequential likes, so that said multiple tracks scan light is distributed at least one direct scanning area top on a surface of said optical touch-control device equably;
First optical module, be arranged at said surface around, be used to reflect said multiple tracks scan light to form multiple tracks first reflection light;
First optical sensing module; Be arranged at said surface around; When object forms touch point on said surface; Said object will block at least one scan light and at least one first reflection light in the said multiple tracks first reflection light in the said multiple tracks scan light respectively under different time, said first optical sensing module produces sensing result according to the reception situation that it receives said multiple tracks scan light and said multiple tracks first reflection light; And
Processing module is coupled to said light source emitting module and said first optical sensing module, is used for judging said touch point in said lip-deep position according to said sequential and said sensing result,
Wherein said light source emitting module is the rotary light source transmitter; The size that the anglec of rotation covering scope of said multiple tracks scan light is launched according to said light source emitting module in said surface is divided into said at least one direct scanning area and at least one indirect scanning zone
Said first optical module and said first optical sensing module are arranged at first side and second side on said surface respectively, said first side and said second side against each other and said second side than said first side near said light source emitting module,
Said optical touch-control device further comprises:
Second optical module is arranged at the 3rd side that is different from said first side and said second side on the said surface, is used to reflect said multiple tracks first reflection light to form multiple tracks reflected light for the second time; And
Second optical sensing module; Be arranged at the 4th side that is different from said first side, said second side and said the 3rd side on the said surface; When said object forms said touch point on said surface; Said object will block the reflected light for the second time of at least one in said at least one scan light, said at least one first reflection light and the said multiple tracks reflected light second time respectively under different time, said first optical sensing module and said second optical sensing module receive said multiple tracks scan light, said multiple tracks first reflection light and the said multiple tracks catoptrical reception situation second time according to it and produce said sensing result.
2. optical touch-control device according to claim 1, wherein said sequential is relevant with the sequencing that said light source emitting module is launched said multiple tracks scan light.
3. optical touch-control device according to claim 1; Wherein in said sequential; Said light source emitting module is launched first scan light, second scan light and the 3rd scan light in the said multiple tracks scan light respectively at the very first time, second time and the 3rd time, the said very first time early than said second time and said second time early than said the 3rd time.
4. optical touch-control device according to claim 3; Between the wherein said very first time and said second time and the time interval that has equal length between said second time and said the 3rd time, the said time interval is preset value or is set by the user.
5. optical touch-control device according to claim 1, wherein said first optical module are one of them that is selected from the group of being made up of reflective optical system, light reflection/sensor, rotatable reflective optical system, a plurality of miniature rotatable reflective optical system and removable rotation reflective optical system.
6. optical touch-control device according to claim 1, wherein said second optical module are one of them that is selected from the group of being made up of reflective optical system, light reflection/sensor, rotatable reflective optical system, a plurality of miniature rotatable reflective optical system and removable rotation reflective optical system.
7. optical touch-control device according to claim 1; Further comprise the 3rd optical module; Be arranged at the 4th side that is different from said first side, said second side and said the 3rd side on the said surface; Be used to reflect said multiple tracks first reflection light to form multiple tracks reflected light for the second time; When said object forms said touch point on said surface; Said object blocks the reflected light for the second time of at least one in said at least one scan light, said at least one first reflection light and the said multiple tracks reflected light second time, and said first optical sensing module receives said multiple tracks scan light, said multiple tracks first reflection light and the said multiple tracks catoptrical reception situation second time according to it and produces said sensing result.
8. optical touch-control device according to claim 7, wherein said the 3rd optical module are one of them that is selected from the group of being made up of reflective optical system, light reflection/sensor, rotatable reflective optical system, a plurality of miniature rotatable reflective optical system and removable rotation reflective optical system.
9. method of moving optical touch-control device; Said optical touch-control device comprises light source emitting module, first optical module, first optical sensing module and processing module; Said first optical module and said first optical sensing module be arranged at respectively said optical touch-control device a surface around, said method comprises the following step:
Said light source emitting module is launched the multiple tracks scan light in proper order according to sequential likes, so that said multiple tracks scan light is distributed at least one direct scanning area top on the said surface of said optical touch-control device equably;
When object forms touch point on said surface; Said object blocks at least one scan light and at least one first reflection light in the multiple tracks first reflection light in the said multiple tracks scan light respectively under different time, wherein said multiple tracks first reflection light reflects said multiple tracks scan light by said first optical module and forms;
Said first optical sensing module produces sensing result according to the reception situation that it receives said multiple tracks scan light and said multiple tracks first reflection light; And
Said processing module is judged said touch point in said lip-deep position according to said sequential and said sensing result,
Wherein said light source emitting module is the rotary light source transmitter; The size that the anglec of rotation covering scope of said multiple tracks scan light is launched according to said light source emitting module in said surface is divided into said at least one direct scanning area and at least one indirect scanning zone
Wherein said optical touch-control device further comprises second optical module and second optical sensing module; Said first optical module, said first optical sensing module, said second optical module and said second optical sensing module are arranged at first side, second side, the 3rd side and the 4th side on said surface respectively, and said method further comprises the following step:
Said second optical module reflects said multiple tracks first reflection light to form multiple tracks reflected light for the second time;
When said object formed said touch point on said surface, said object blocked the reflected light for the second time of at least one in said at least one scan light, said at least one first reflection light and the said multiple tracks reflected light second time respectively under different time; And
Said first optical sensing module and said second optical sensing module receive said multiple tracks scan light, said multiple tracks first reflection light and the said multiple tracks catoptrical reception situation second time according to it and produce said sensing result.
10. method according to claim 9, wherein said sequential is relevant with the sequencing that said light source emitting module is launched said multiple tracks scan light.
11. method according to claim 9; Wherein said optical touch-control device further comprises the 3rd optical module; Said first optical module, said first optical sensing module, said second optical module and said the 3rd optical module are arranged at first side, second side, the 3rd side and the 4th side on said surface respectively, and said method further comprises the following step:
Said second optical module and said the 3rd optical module reflect said multiple tracks first reflection light to form multiple tracks reflected light for the second time;
When said object formed said touch point on said surface, said object blocked the reflected light for the second time of at least one in said at least one scan light, said at least one first reflection light and the said multiple tracks reflected light second time; And
Said first optical sensing module receives said multiple tracks scan light, said multiple tracks first reflection light and the said multiple tracks catoptrical reception situation second time according to it and produces said sensing result.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101600384A CN101957690B (en) | 2009-07-16 | 2009-07-16 | Optical touch device and operation method thereof |
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| CN2009101600384A CN101957690B (en) | 2009-07-16 | 2009-07-16 | Optical touch device and operation method thereof |
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| CN101957690A CN101957690A (en) | 2011-01-26 |
| CN101957690B true CN101957690B (en) | 2012-07-04 |
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| CN103365479A (en) * | 2012-03-26 | 2013-10-23 | 友碁科技股份有限公司 | Optical touch control device |
| CN110391807B (en) * | 2018-04-19 | 2022-10-14 | 宏碁股份有限公司 | Optical knob device and optical detection method |
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| US5764223A (en) * | 1995-06-07 | 1998-06-09 | International Business Machines Corporation | Touch-screen input device using the monitor as a light source operating at an intermediate frequency |
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| US6480187B1 (en) * | 1997-08-07 | 2002-11-12 | Fujitsu Limited | Optical scanning-type touch panel |
| CN101137956A (en) * | 2005-03-10 | 2008-03-05 | 皇家飞利浦电子股份有限公司 | System and method for detecting the location, size and shape of multiple objects that interact with a touch screen display |
| CN101441540A (en) * | 2007-11-20 | 2009-05-27 | 原相科技股份有限公司 | Optical touch control apparatus |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5764223A (en) * | 1995-06-07 | 1998-06-09 | International Business Machines Corporation | Touch-screen input device using the monitor as a light source operating at an intermediate frequency |
| US6480187B1 (en) * | 1997-08-07 | 2002-11-12 | Fujitsu Limited | Optical scanning-type touch panel |
| CN1372188A (en) * | 2002-03-28 | 2002-10-02 | 冯志刚 | Touch screen optical system adopting step type parallel light beam extending lens group |
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| CN101441540A (en) * | 2007-11-20 | 2009-05-27 | 原相科技股份有限公司 | Optical touch control apparatus |
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