CN102314264A - Optical touch screen - Google Patents
Optical touch screen Download PDFInfo
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- CN102314264A CN102314264A CN201010226442XA CN201010226442A CN102314264A CN 102314264 A CN102314264 A CN 102314264A CN 201010226442X A CN201010226442X A CN 201010226442XA CN 201010226442 A CN201010226442 A CN 201010226442A CN 102314264 A CN102314264 A CN 102314264A
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Abstract
The invention discloses an optical touch screen. When an object is in contact with an operation panel, a preset image which is projected by a projection light source and contains image information can form an object image with the image information on the surface of the object, while an image sensor can acquire a reflected image with the object image. Then, an angle is calculated according to the imaging position of the object in the reflected image and the position opposite to a preset shaft, and the linear distance from the image sensor to the object is calculated through comparing positions, sizes and/or phase positions of the image information in the preset image and the reflected image, thus, the position coordinate of the object on the operation panel can be located. Therefore, the optical touch screen provided by the invention has the advantages that a touch point of the optical touch screen can cover an entire touch panel and the optical touch screen has higher design flexibility. In addition, the optical touch screen provided by the invention has lower cost.
Description
Technical field
The invention relates to a kind of optical touch screen, refer to a kind of optical touch screen that utilizes imageing sensor and special light emitting source to try to achieve the object position of touch especially.
Background technology
The principle of optical touch screen of the prior art is to utilize the blocking light signal to judge that the mode of touch point operates; It is provided with a plurality of optical signal receivers and a plurality of optical signal transmitter around contact panel, and the optical signal receiver that is arranged in around the contact panel can simultaneously or be launched light signal in turn.When object blocking light signal; Microcontroller can be done parsing to the signal that is received from a plurality of optical signal receivers; With the location touch point; To be sent to the device and the processor of control contact panel then corresponding to the signal of touch point via control circuit, the function corresponding to touch point is perhaps carried out in the last position that demonstrates the object touching again via contact panel.
Because prior art is to utilize the blocking optical signal path to reach the purpose of location touch point, therefore, the number of the touch point that can detect is to be determined by the optical signal receiver around the contact panel and the number of optical signal transmitter.So if touch point can be contained most of zone of contact panel; Then must around contact panel, be covered with optical signal transmitter and optical signal receiver, so can reduce the elasticity that designs on the optical touch screen and need around contact panel, reserve a lot of space mounting optical signal transmitters and optical signal receiver.In addition, prior art also utilizes optical signal transmitter to many optical signal receivers, or optical signal receiver can't use the shortcoming in space on the contact panel to the principle of operation of many optical signal transmitters but have efficiently.
Summary of the invention
One embodiment of the invention provide a kind of optical touch screen.This optical touch screen comprises guidance panel, at least one projection light source, at least one imageing sensor, angle calculation unit, metrics calculation unit and object positioning unit.This guidance panel is in order to provide at least one object contact, and this guidance panel has predetermined shaft; This at least projection light source and form at least one similar image in order to comprising at least one predetermined image of at least one predetermined image towards the projection of this guidance panel in this subject surface; This at least one imageing sensor is in order to obtain at least one reflected image of the image that comprises this object, and wherein this at least one reflected image comprises this at least one similar image; This angle calculation unit is set up the online of imageing sensor and this object in this at least one imageing sensor according to the image space of the reflected image of this object in this at least one reflected image, in order to calculate this online and difference angle this predetermined shaft; This metrics calculation unit is position, size and/or the phase place of the similar image in the predetermined image in this at least one predetermined image and this at least one similar image relatively, in order to calculate imageing sensor and the air line distance of this object in this at least one imageing sensor; And this object positioning unit is located the position coordinates of this object at this guidance panel according to this difference angle and this air line distance.
An also embodiment of the present invention provides a kind of optical touch screen.This optical touch screen comprises guidance panel, at least one projection light source, at least one imageing sensor, angle calculation unit, metrics calculation unit and object positioning unit.This guidance panel is in order to provide at least one object contact; This at least one projection light source is in order to comprising the predetermined image of image information towards the projection of this guidance panel, and forms this image information in this subject surface; This at least one imageing sensor is in order to obtain at least one reflected image of the image that comprises this object, and wherein this at least one reflected image comprises this image information; This angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle; This metrics calculation unit is relatively launched the mistiming that comprises between launch time that being somebody's turn to do of this image information is scheduled to image and the time of reception that receives this reflected image that comprises this image information, in order to calculate the air line distance of this imageing sensor and this object; And this object positioning unit, calculate the relative position of this object according to this difference angle and this air line distance at this guidance panel.
An also embodiment of the present invention provides a kind of optical touch screen.This optical touch screen comprises guidance panel, at least one imageing sensor, angle calculation unit, metrics calculation unit and object positioning unit.This guidance panel is in order to provide at least one object contact; This at least one imageing sensor is in order to obtain from least one reflected image of this subject surface reflection; This angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle; This metrics calculation unit is according to the air line distance of imaging size, image space, imaging similarity and/or brightness calculation this imageing sensor and this object of this object in this reflected image; And this object positioning unit calculates the relative position of this object at this guidance panel according to this difference angle and this air line distance.
An also embodiment of the present invention provides a kind of optical touch screen.This optical touch screen comprises guidance panel, at least one imageing sensor, ultrasonic transceiver, angle calculation unit, metrics calculation unit and object positioning unit.This guidance panel is in order to provide at least one object contact; This at least one imageing sensor is in order to obtain from the reflected image of this subject surface reflection; This ultrasonic transceiver is in order to towards this guidance panel projection ultrasonic signal, and receives the reflection ultrasonic signal by this object reflection; This angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle; This metrics calculation unit is relatively launched the launch time of this ultrasonic signal and is received mistiming between the time of reception of this reflection ultrasonic signal in order to calculate the air line distance of this ultrasonic transceiver and this object; And this object positioning unit calculates the relative position of this object at this guidance panel according to this difference angle and this air line distance.
An also embodiment of the present invention provides a kind of optical touch screen.This optical touch screen comprises guidance panel, first projection light source, second projection light source, first imageing sensor, second imageing sensor, metrics calculation unit and object positioning unit.This guidance panel is in order at least one object contact to be provided; This first projection light source is the first predetermined image that comprises first predetermined image in order to throw towards this guidance panel, and forms first similar image on the surface of this object; This second projection light source is the second predetermined image that comprises second predetermined image in order to throw towards this guidance panel, and forms second similar image on the surface of this object; This first imageing sensor is in order to obtain first reflected image of this first similar image that comprises this object; This second imageing sensor is in order to obtain second reflected image of this second similar image that comprises this object; This metrics calculation unit is this second similar image and this first predetermined image of this first similar image, this second reflected image of relatively this first reflected image, position, size and/or the phase place in this second predetermined image, in order to calculate the air line distance of this object and this first imageing sensor, this second imageing sensor; And this object positioning unit is according to the air line distance of this object and this first imageing sensor, this second imageing sensor, calculates the relative position of this object at this guidance panel.
A kind of optical touch screen provided by the present invention calculates the angle between the online and predetermined shaft between object and this first imageing sensor through first projection light source, first imageing sensor and angle calculation unit; In addition; Calculate the air line distance between this second imageing sensor and this object through second projection light source, second imageing sensor and metrics calculation unit, or calculate the air line distance between this object and this ultrasonic transceiver through ultrasonic transceiver and this metrics calculation unit.So, the object positioning unit can be located the position coordinates of this object at guidance panel according to above-mentioned this angle that obtains and this air line distance.Therefore, this optical touch screen not only touch point can be contained the whole of contact panel, and this optical touch screen has the bigger advantage of design flexibility.
Description of drawings
Figure 1A is the synoptic diagram of one embodiment of the invention explanation optical touch screen.
Figure 1B is the synoptic diagram that an also embodiment of the present invention explains the optical touch screen.
Fig. 2 is the position at explanation first projection light source and first imageing sensor place, and is relative with the position at second projection light source and second imageing sensor place.
Fig. 3 A and Fig. 3 B are the synoptic diagram that explanation is incident upon the relevance of coded image and the distance between the object and second imageing sensor on the object.
Fig. 4 A and Fig. 4 B are the synoptic diagram that explanation is incident upon the relevance of speckle image and the distance between the object and second imageing sensor on the object.
Fig. 5 A and Fig. 5 B are the description object positioning units according to angle and the air line distance anchored object synoptic diagram at the position coordinates of guidance panel.
Fig. 6 is the synoptic diagram that an also embodiment of the present invention explains the optical touch screen.
Fig. 7 is the position at explanation first projection light source and first imageing sensor place, and is relative with the position at second projection light source and second imageing sensor place.
Fig. 8 is the synoptic diagram that an also embodiment of the present invention explains the optical touch screen.
Fig. 9 A and Fig. 9 B are the synoptic diagram of relevance of size and the distance between the object and second imageing sensor of the object image of explanation in second reflected image.
Figure 10 is the position at explanation first projection light source and first imageing sensor place, and is relative with the position at second projection light source and second imageing sensor place.
Figure 11 is the synoptic diagram that an also embodiment of the present invention explains the optical touch screen.
Figure 12 is the corner of explanation projection light source and imageing sensor place guidance panel, and is relative with the corner of ultrasonic transceiver place guidance panel.
Figure 13 is the synoptic diagram of one embodiment of the invention explanation optical touch screen.
Wherein, description of reference numerals is following:
100,600,800,1100,1300 optical touch screens
102,602,802,1102,1302 guidance panels
104,604,804,1,304 first projection light sources
106,606,806,1,306 second projection light sources
1104 projection light sources
1106 imageing sensors
1108 ultrasonic transceivers
108,608,808,1,308 first imageing sensors
109 imageing sensor groups
110,610,810,1,310 second imageing sensors
112,612,812,1110 angle calculation unit
114,614,814,1112,1312 metrics calculation unit
116,616,816,1114,1314 object positioning units
The X intersection point
L1 is online
θ 1 angle
D1, D2, D3, D4, D5, D6 air line distance
Embodiment
Please with reference to Figure 1A, Figure 1A is the synoptic diagram of one embodiment of the invention explanation optical touch screen 100.Optical touch screen 100 comprises guidance panel 102, first projection light source 104, second projection light source 106, first imageing sensor 108, second imageing sensor 110, angle calculation unit 112, metrics calculation unit 114 and object positioning unit 116.Guidance panel 102 is to be used to provide to let object contact; It has the predetermined shaft of the upper limb of operation repetitive panel 102; And predetermined shaft is in order to the definition angle; But predetermined shaft of the present invention is not limited to the upper limb of operation repetitive panel 102, but predetermined shaft also lower edge, left border and the right border of operation repetitive panel 102.First projection light source 104 is in order to towards guidance panel 102 projection IRs, and first projection light source 104 is preferably infrared light supply, but the present invention is not limited to infrared light supply, and other also can like visible light source, ultraviolet source.First imageing sensor 108 is preferably the infrared light image sensor, in order to obtain the influence of other light source of IR and filtering (similarly being visible light) to optical touch screen 100; When wherein first projection light source 104 was towards guidance panel 102 projection IRs, first imageing sensor 108 obtained first reflected image that comprises object reflective infrared light.Second projection light source 106 is for launching the light source (for example laser light) of dull and narrow spectrum frequency range; In order to throw the predetermined image that comprises predetermined image (pattern) towards making panel 102; And at subject surface formation similar image, wherein predetermined image is to be speckle image (speckle pattern) or coded image (coded pattern).Second imageing sensor 110 is to comprise second reflected image of second projection light source 106 at the formed similar image of subject surface in order to obtain.Angle calculation unit 112 is coupled to first imageing sensor 108; In order to setting up the online L1 of first imageing sensor 108 or second imageing sensor 110 and object according to the image space of first reflected image of object in first imageing sensor 108, and calculate the angle θ 1 between online L1 and the predetermined shaft.Metrics calculation unit 114 is coupled to second imageing sensor 110, in order to compare position, size and/or the phase place of the similar image in the predetermined image and second reflected image, to calculate the air line distance D1 between second imageing sensor 110 and the object.Object positioning unit 116 is coupled to metrics calculation unit 114 and angle calculation unit 112, in order to according to angle θ 1 and the air line distance D1 anchored object position coordinates at guidance panel 102.Wherein first projection light source 104, second projection light source 106, first imageing sensor 108 and second imageing sensor 110 are the same corners at guidance panel 102.
Please with reference to Figure 1B, Figure 1B is the synoptic diagram that an also embodiment of the present invention explains optical touch screen 200.The difference of optical touch screen 200 and optical touch screen 100 is that first imageing sensor 108 and second imageing sensor 110 are integrated into imageing sensor group 109, and imageing sensor group 109 is coupled to angle calculation unit 112 and metrics calculation unit 114.In addition, all the other principle of operation of optical touch screen 200 are all identical with optical touch screen 100, repeat no more at this.
In addition, the embodiment of Figure 1A is not limited to only have 104,106 and two imageing sensors 108,110 of two projection light sources.And the embodiment of Figure 1A also is not subject to first projection light source 104, second projection light source 106, first imageing sensor 108 and second imageing sensor 110 all in the same corner of guidance panel 102.Please with reference to Fig. 2, Fig. 2 is the corner of explanation first projection light source 104 and first imageing sensor, 108 place guidance panels 102, and is relative with the corner of second projection light source 106 and second imageing sensor, 110 place guidance panels 102.
Please with reference to Fig. 3 A, Fig. 3 B, Fig. 4 A and Fig. 4 B.Fig. 3 A and Fig. 3 B are the synoptic diagram that explanation is incident upon the relevance of coded image and the distance between the object and second imageing sensor 110 on the object.Shown in Fig. 3 A and Fig. 3 B, the distance between the object and second imageing sensor 110 not simultaneously, be incident upon interval between the coded image on the object also can difference or image space can change to some extent.Therefore, metrics calculation unit 114 image processing algorithms capable of using are tried to achieve the information of space phase, and the information according to space phase can calculate the air line distance D1 between second imageing sensor 110 and the object then.Fig. 4 A and Fig. 4 B are the synoptic diagram that explanation is incident upon the relevance of speckle image and the distance between the object and second imageing sensor 110 on the object.Shown in Fig. 4 A and 4B, the distance between the object and second imageing sensor 110 not simultaneously, the speckle density or the position that are incident upon the speckle image on the object can be different with distance between second imageing sensor 110 and change along with object.Therefore, metrics calculation unit 114 speckle image spatial statistics specificity analysis algorithms capable of using are tried to achieve the air line distance D1 between second imageing sensor 110 and the object.
Please with reference to Fig. 5 A and Fig. 5 B, 5A figure and Fig. 5 B are description object positioning units 116 according to angle θ 1 and the air line distance D1 anchored object synoptic diagram at the position coordinates of guidance panel 102.Shown in 5A figure and Fig. 5 B; With air line distance D1 is radius; Second imageing sensor 110 is drawn the part of a circle for the center of circle; And determine the online L1 meeting of angle θ 1 and justify the X that intersects at a point that object positioning unit 116 can be according to online L1 and the position coordinates of the intersection point X anchored object of justifying at guidance panel 102 with predetermined shaft.
Please with reference to Fig. 6, Fig. 6 is the synoptic diagram that an also embodiment of the present invention explains optical touch screen 600.Optical touch screen 600 comprises guidance panel 602, first projection light source 604, second projection light source 606, first imageing sensor 608, second imageing sensor 610, angle calculation unit 612, metrics calculation unit 614 and object positioning unit 616.Difference between the embodiment of Fig. 6 and the embodiment of Figure 1A be the metrics calculation unit 614 of the embodiment of Fig. 6 be the record emission predetermined image that comprises image information launch time T0 with the time of reception T1 that receives second reflected image that comprises image information between mistiming (T1-T0), metrics calculation unit 614 utilizes the light velocity and mistiming (T1-T0) to calculate the air line distance D2 of second imageing sensor 610 and object then.In addition, all the other principle of operation of optical touch screen 600 are all identical with optical touch screen 100, repeat no more at this.
In addition, the embodiment of Fig. 6 is not limited to only have 604,606 and two imageing sensors 608,610 of two projection light sources; And the embodiment of Fig. 6 also is not subject to first projection light source 604, second projection light source 606, first imageing sensor 608 and second imageing sensor 610 all in the same corner of guidance panel 602.Please with reference to Fig. 7, Fig. 7 is the corner of explanation first projection light source 604 and first imageing sensor, 608 place guidance panels 602, and is relative with the corner of second projection light source 606 and second imageing sensor, 610 place guidance panels 602.
Please with reference to Fig. 8, Fig. 8 is the synoptic diagram that an also embodiment of the present invention explains optical touch screen 800.Optical touch screen 800 comprises guidance panel 802, first projection light source 804, second projection light source 806, first imageing sensor 808, second imageing sensor 810, angle calculation unit 812, metrics calculation unit 814 and object positioning unit 816.Difference between the embodiment of Fig. 8 and the embodiment of Figure 1A is that second projection light source 806 and first projection light source 804 of the embodiment of Fig. 8 are all infrared light supply and second imageing sensor 810 is the infrared light image sensor.Wherein second imageing sensor 810 is second reflected images that comprise the object image information in order to obtain; And metrics calculation unit 814 is coupled to second imageing sensor 810; Be to utilize brightness or the position of size and/or the object image in second reflected image of object image in second reflected image can be along with object and the characteristic of change different, to calculate the air line distance D3 between second imageing sensor 810 and the object with distance between second imageing sensor 810.Please with reference to Fig. 9 A and Fig. 9 B, Fig. 9 A and Fig. 9 B are the synoptic diagram of relevance of size and the distance between the object and second imageing sensor 810 of the object image of explanation in second reflected image.Shown in Fig. 9 A and Fig. 9 B, the size of the object image in second reflected image can be different with distance between second imageing sensor 810 and change along with object.In addition, when the distance between the object and second imageing sensor 810 was closer, the brightness of the object image in second reflected image was brighter; When the distance between the object and second imageing sensor 810 was distant, the brightness of the object image in second reflected image was darker.Therefore, can go out the air line distance D3 between second imageing sensor 810 and the object through above-mentioned property calculation.Except that above-mentioned difference, all the other principle of operation of optical touch screen 800 are all identical with optical touch screen 100, repeat no more at this.
In addition, the embodiment of Fig. 8 is not limited to only have 804,806 and two imageing sensors 808,810 of two projection light sources; And the embodiment of Fig. 8 also is not subject to first projection light source 804, second projection light source 806, first imageing sensor 808 and second imageing sensor 810 all in the same corner of guidance panel 802.Please with reference to Figure 10, Figure 10 is the corner of explanation first projection light source 804 and first imageing sensor, 808 place guidance panels 802, and is relative with the corner of second projection light source 806 and second imageing sensor, 810 place guidance panels 802.
Please with reference to Figure 11, Figure 11 is the synoptic diagram that an also embodiment of the present invention explains optical touch screen 1100.Optical touch screen 1100 comprises guidance panel 1102, projection light source 1104, imageing sensor 1106, ultrasonic transceiver 1108, angle calculation unit 1110, metrics calculation unit 1112 and object positioning unit 1114.In the embodiment of Figure 11, ultrasonic transceiver 1108 is towards guidance panel 1102 projection ultrasonic signals, and reception is by the reflection ultrasonic signal of object reflection; And metrics calculation unit 1112 be coupled to ultrasonic transceiver 1108 record emission ultrasonic signals launch time U0 with the time of reception U1 that receives reflection ultrasonic signal between mistiming (U1-U0), metrics calculation unit 1112 utilizes ultrasonic speed and mistiming (U1-U0) to calculate the air line distance D4 of ultrasonic transceiver 1108 and object then.In addition, all the other principle of operation of optical touch screen 1100 are all identical with optical touch screen 100, repeat no more at this.In addition, the embodiment of Figure 11 is not limited to have only a projection light source 804, an imageing sensor 1106 and a ultrasonic transceiver 1108.
Yet the embodiment of Figure 11 also is not subject to projection light source 1104, imageing sensor 1106 and the ultrasonic transceiver 1108 same corner at guidance panel 802.Please with reference to Figure 12, Figure 12 is the corner of explanation projection light source 1104 and imageing sensor 1106 place guidance panels 1102, and is relative with the corner of ultrasonic transceiver 1108 place guidance panels 1102.
Please with reference to Figure 13, Figure 13 is the synoptic diagram of one embodiment of the invention explanation optical touch screen 1300.Optical touch screen 1300 comprises guidance panel 1302, first projection light source 1304, second projection light source 1306, first imageing sensor 1308, second imageing sensor 1310, metrics calculation unit 1312 and object positioning unit 1314.Difference between the embodiment of Figure 13 and the embodiment of Figure 1A is that first projection light source 1304 and second projection light source 1306 of the embodiment of Figure 13 are for launching the light source (for example laser light) of dull and narrow spectrum frequency range; In order to comprise first predetermined image of first predetermined image (pattern) and the second predetermined image of second predetermined image towards doing panel 1302 projections; And form first similar image and second similar image in subject surface, wherein first predetermined image, second predetermined image is to be speckle image (speckle pattern) or coded image (coded pattern).First imageing sensor 1308 is to comprise first reflected image of first projection light source 1304 at formed first similar image of subject surface in order to obtain.Second imageing sensor 1310 is to comprise second reflected image of second projection light source 1306 at formed second similar image of subject surface in order to obtain.Metrics calculation unit 1312 is to be coupled to first imageing sensor 1308 and second imageing sensor 1310; Position, size and/or the phase place in second similar image of first similar image of first reflected image, second reflected image and first predetermined image, second predetermined image relatively, the calculating object and first imageing sensor 1308, the air line distance D5 of second imageing sensor 1310, D6 then.Object positioning unit 1314 is to be coupled to metrics calculation unit 1312, in order to according to air line distance D5, the D6 anchored object position coordinates at guidance panel 1302.In addition, all the other principle of operation of optical touch screen 1300 are all identical with optical touch screen 100, repeat no more at this.Wherein the corner of first projection light source 1304 and first imageing sensor, 1308 place guidance panels 1302 is adjacent with the corner of second projection light source 1306 and second imageing sensor, 1310 place guidance panels 1302.
In sum, optical touch screen provided by the present invention calculates the angle between the online and predetermined shaft between the object and first imageing sensor through first projection light source, first imageing sensor and angle calculation unit.In addition; Optical touch screen provided by the present invention calculates the air line distance between second imageing sensor and the object through second projection light source, second imageing sensor and metrics calculation unit, or calculates the air line distance between object and the ultrasonic transceiver through ultrasonic transceiver and metrics calculation unit.In addition, optical touch screen provided by the present invention also can through first projection light source, first imageing sensor and second projection light source, second imageing sensor and metrics calculation unit calculate object and first imageing sensor, second imageing sensor and between air line distance.So, the object positioning unit can be according to above-mentioned angle that obtains and air line distance, or object and first imageing sensor, second imageing sensor and between the air line distance anchored object at the position coordinates of guidance panel.Therefore, optical touch screen provided by the present invention not only touch point can be contained the whole of contact panel, and this optical touch screen has the advantage of big design flexibility.In addition, the cost of optical touch screen provided by the present invention also significantly reduces than prior art.
The above is merely the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (18)
1. optical touch screen comprises:
Guidance panel, in order to object contact at least to be provided, this guidance panel has predetermined shaft;
This optical touch screen is characterised in that also and comprises:
At least one projection light source in order to comprising at least one predetermined image of at least one predetermined image towards the projection of this guidance panel, and forms at least one similar image in this subject surface;
At least one imageing sensor, in order to obtain at least one reflected image of the image that comprises this object, wherein this at least one reflected image comprises this at least one similar image;
Angle calculation unit is set up the online of imageing sensor and this object in this at least one imageing sensor according to the image space of the reflected image of this object in this at least one reflected image, in order to calculate this online and difference angle this predetermined shaft;
Metrics calculation unit, relatively position, size and/or the phase place of the similar image in the predetermined image in this at least one predetermined image and this at least one similar image are in order to calculate imageing sensor and the air line distance of this object in this at least one imageing sensor; And
The object positioning unit is located the position coordinates of this object at this guidance panel according to this difference angle and this air line distance.
2. optical touch screen as claimed in claim 1 is characterized in that, this predetermined image is to be speckle image or coded image.
3. optical touch screen as claimed in claim 1; It is characterized in that; Comprise first imageing sensor and second imageing sensor, wherein this first imageing sensor is to obtain first reflected image, calculates this difference angle in order to cooperate this angle calculation unit; And this second imageing sensor is to obtain second reflected image, calculates this air line distance in order to cooperate this metrics calculation unit.
4. optical touch screen as claimed in claim 3; It is characterized in that; This first imageing sensor is to be the infrared light image sensor, and in order to obtaining IR, and the projection light source in this at least one projection light source is an infrared light supply; In order to throw IR towards this guidance panel, this first imageing sensor can be obtained this first reflected image of the image that comprises this object.
5. optical touch screen as claimed in claim 3; It is characterized in that; Projection light source in this at least one projection light source is to launch dullness and short wavelength's light, and this second imageing sensor promptly is used to obtain and comprises this projection light source this second reflected image at the formed similar image of this subject surface.
6. optical touch screen comprises:
Guidance panel is in order to provide at least one object contact;
This optical touch screen is characterised in that also and comprises:
At least one projection light source in order to comprising the predetermined image of image information towards the projection of this guidance panel, and forms this image information in this subject surface;
At least one imageing sensor, in order to obtain at least one reflected image of the image that comprises this object, wherein this at least one reflected image comprises this image information;
Angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle;
Metrics calculation unit, relatively emission comprises the mistiming between launch time that being somebody's turn to do of this image information is scheduled to image and the time of reception that receives this reflected image that comprises this image information, in order to calculate the air line distance of this imageing sensor and this object; And
The object positioning unit calculates the relative position of this object at this guidance panel according to this difference angle and this air line distance.
7. optical touch screen as claimed in claim 6; It is characterized in that; Comprise first imageing sensor and second imageing sensor, wherein this first imageing sensor is to obtain first reflected image, calculates this difference angle in order to cooperate this angle calculation unit; And this second imageing sensor is to obtain second reflected image, calculates this air line distance in order to cooperate this metrics calculation unit.
8. optical touch screen as claimed in claim 7; It is characterized in that; This first imageing sensor be for the infrared light image sensor in order to obtain IR; And further provide infrared light supply in order to throw IR towards this guidance panel, this first imageing sensor can be obtained this first reflected image that comprises this object image-forming information.
9. optical touch screen as claimed in claim 7; It is characterized in that; This projection light source is to launch dullness and short wavelength's light, and this second imageing sensor promptly is used to obtain and comprises that this projection light source forms this second reflected image that comprises this image information in this subject surface.
10. optical touch screen comprises:
Guidance panel is in order to provide at least one object contact;
This optical touch screen is characterised in that also and comprises:
At least one imageing sensor is in order to obtain from least one reflected image of this subject surface reflection;
Angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle;
Metrics calculation unit is according to the imaging size of this object in this reflected image and/or the air line distance of this imageing sensor of brightness calculation and this object; And
The object positioning unit calculates the relative position of this object at this guidance panel according to this difference angle and this air line distance.
11. optical touch screen as claimed in claim 10; It is characterized in that; Comprise first imageing sensor and second imageing sensor, wherein this first imageing sensor is to obtain first reflected image, calculates this difference angle in order to cooperate this angle calculation unit; And this second imageing sensor is to obtain second reflected image, calculates this air line distance in order to cooperate this metrics calculation unit.
12. optical touch screen as claimed in claim 11; It is characterized in that; This first imageing sensor be for the infrared light image sensor in order to obtain IR; And further provide infrared light supply in order to throw IR towards this guidance panel, this first imageing sensor can be obtained this first reflected image that comprises this object image-forming information.
13. optical touch screen as claimed in claim 11; It is characterized in that; This second imageing sensor be for the infrared light image sensor in order to obtain IR; And further provide infrared light supply in order to throw IR towards this guidance panel, this second imageing sensor can be obtained this second reflected image that comprises this object image-forming information.
14. an optical touch screen comprises:
Guidance panel is in order to provide at least one object contact;
This optical touch screen is characterised in that also and comprises:
At least one imageing sensor is in order to obtain from the reflected image of this subject surface reflection;
The ultrasonic transceiver in order to towards this guidance panel projection ultrasonic signal, and receives the reflection ultrasonic signal by this object reflection;
Angle calculation unit is set up the online of this imageing sensor and this object according to the image space of this object in this reflected image, in order to calculate this online and this predetermined shaft difference angle;
Metrics calculation unit is relatively launched the launch time of this ultrasonic signal and is received mistiming between the time of reception of this reflection ultrasonic signal in order to calculate the air line distance of this ultrasonic transceiver and this object; And
The object positioning unit calculates the relative position of this object at this guidance panel according to this difference angle and this air line distance.
15. optical touch screen as claimed in claim 14; It is characterized in that; This imageing sensor be for the infrared light image sensor in order to obtain IR; And further provide infrared light supply in order to throw IR towards this guidance panel, this imageing sensor can be obtained this reflected image that comprises this object image-forming information.
16. an optical touch screen comprises:
Guidance panel is in order to provide at least one object contact;
This optical touch screen is characterised in that also and comprises:
First projection light source is scheduled to image in order to comprise first of first predetermined image towards this guidance panel projection, and is formed first similar image on the surface of this object;
Second projection light source is scheduled to image in order to comprise second of second predetermined image towards this guidance panel projection, and is formed second similar image on the surface of this object;
First imageing sensor is in order to obtain first reflected image of this first similar image that comprises this object;
Second imageing sensor is in order to obtain second reflected image of this second similar image that comprises this object;
Metrics calculation unit; Position, size and/or the phase place in this second similar image of this first similar image of this first reflected image, this second reflected image and this first predetermined image, this second predetermined image relatively is in order to calculate the air line distance of this object and this first imageing sensor, this second imageing sensor; And
The object positioning unit according to the air line distance of this object and this first imageing sensor, this second imageing sensor, calculates the relative position of this object at this guidance panel.
17. optical touch screen as claimed in claim 16 is characterized in that, this first predetermined image, this second predetermined image are to be speckle image or coded image.
18. optical touch screen as claimed in claim 16 is characterized in that, this first projection light source, this second projection light source are to launch dullness and short wavelength's light.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010226442XA CN102314264B (en) | 2010-07-08 | 2010-07-08 | Optical touch screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010226442XA CN102314264B (en) | 2010-07-08 | 2010-07-08 | Optical touch screen |
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| CN102314264A true CN102314264A (en) | 2012-01-11 |
| CN102314264B CN102314264B (en) | 2013-11-13 |
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| CN102486704A (en) * | 2010-12-06 | 2012-06-06 | 扬升照明股份有限公司 | Touch module and touch display device |
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