CN101581999A - Method for forming coordinates of infrared positioning frame - Google Patents
Method for forming coordinates of infrared positioning frame Download PDFInfo
- Publication number
- CN101581999A CN101581999A CNA2009100384918A CN200910038491A CN101581999A CN 101581999 A CN101581999 A CN 101581999A CN A2009100384918 A CNA2009100384918 A CN A2009100384918A CN 200910038491 A CN200910038491 A CN 200910038491A CN 101581999 A CN101581999 A CN 101581999A
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- infrared
- tube
- touch objects
- receiver module
- blocked
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Abstract
The invention discloses a method for forming coordinates of an infrared positioning frame, which mainly comprises the following steps that: a coordinate system is set up for positioning calibration; an infrared tube is equally divided; a secondary microprocessor records shading start and end points of a touching object; and a primary microprocessor determines whether a touch exists at the juncture of two receiving modules; if so, combination processing is carried out; and finally the results of the processing is substituted in an equation to determine touch coordinates. Compared with the prior art, the method has the characteristics of high positioning precision, fast response, great applicability and high reliability, and the like.
Description
[technical field]
The present invention relates to a kind of infrared location technology, particularly relates to a kind of coordinate formation method of infrared posting.
[background technology]
Infrared touch panel with simple in structure, be not subjected to electric current, voltage and electrostatic interference, and suit under some harsh environmental conditions, to work, and have high stability, high resolving power, easy for installation, the computing machine that can be used on each class, shell adds plurality of advantages such as lastblock tempered glass is dustproof, anti-riot with regard to realizing, waterproof, make infrared touch panel be a dark horse, more and more become the main product in touch-screen market.
In order to satisfy the requirement of large scale touch-screen, existing infrared posting mainly adopts the method for module splicing, by the mode of many groups infrared transmission module and infrared receiving module splicing, the production difficulty can be reduced, the splicing requirement of different size can be realized, applying flexible, applicability is strong, and response is fast.But simultaneously,, particularly, be easy to generate erroneous judgement, make that infrared accurate positioning degree is not high, make a touch point may produce two coordinates, the accuracy of influence location in the junction of concatenation module owing to adopt the mode of module splicing.
Therefore, provide a kind of setting accuracy height, applying flexible, can adapt to the touch-screen localization method that different size splicing requires, accurately distinguishes the touch point coordinate.
[summary of the invention]
The shortcoming that the objective of the invention is to overcome prior art is with not enough, and a kind of setting accuracy, response is fast, applicability is strong, reliability is high infrared posting coordinate formation method of improving is provided.
Purpose of the present invention is achieved through the following technical solutions:
Existing infrared posting comprises, each one or more groups transmitter module and receiver module of arranging on horizontal stroke, longitudinal direction, infrared transmitting tube numbering to each transmitter module, set out with true origin, on the X direction, the infrared tube of transmitter module SX-0 is numbered 0,1,2......a0, and the infrared tube of transmitter module SX-1 is numbered 0,1,2......a1, so analogizes.On the y direction, the infrared tube of transmitter module SY-0 is numbered 0,1,2......b0, and the infrared tube of transmitter module SY-1 is numbered 0,1,2......b1, so analogizes.To the infrared receiving tube of each receiver module numbering, to set out with true origin, on the X direction, the infrared tube of receiver module RX-0 is numbered 0,1,2......a0, and the infrared tube of receiver module RX-1 is numbered 0,1,2......a1, so analogizes.On the y direction, the infrared tube of receiver module RY-0 is numbered 0,1,2......b0, and the infrared tube of receiver module RY-1 is numbered 0,1,2......b1, so analogizes.Link to each other by synchronous signal line between each transmitter module, link to each other with bus by synchronous signal line between each receiver module, described each receiver module and transmitter module are by controlling from microprocessor, this infrared positioning touch device also comprises a master microprocessor, this master microprocessor can with one of them from the shared microprocessor of microprocessor.Two or more transmitter modules can be shared one from microprocessor, two or more receiver modules also can be shared one from microprocessor.Linking to each other with master microprocessor by synchronous signal line of transmitter module from microprocessor, linking to each other with master microprocessor with synchronous signal line of receiver module from microprocessor through bus, benchmark synchronizing signal of this master microprocessor output give all transmitter modules from microprocessor and all receiver modules from microprocessor, and obtain the detected block information of each receiver module from bus, carry out touch location calculation, and result of calculation is sent to computing machine.
A kind of infrared posting coordinate formation method may further comprise the steps:
Step 1: set coordinate system, position calibration;
Step 2: start the scanning of infrared posting transmitter module and receiver module;
Step 3:, and send to master microprocessor from the starting point of blocking of microprocessor records touch objects;
Step 4:, and send to master microprocessor from the terminating point that blocks of microprocessor records touch objects;
Step 5: master microprocessor judges whether to exist position, the end infrared tube of receiver module A, and the first infrared tube of the receiver module B that is adjacent all detects and be blocked, and if not, enters step 6; If enter step 7;
Step 6: the substitution formula, the master microprocessor coordinates computed, and send to computing machine, return step 2;
Step 7: master microprocessor blocks starting point with the detected starting point of blocking of receiver module A as touch objects, the detected terminating point that blocks that blocks terminating point as touch objects of receiver module B;
Step 8: the substitution formula, the master microprocessor coordinates computed, and send to computing machine, return step 2.
Touch objects is blocked starting point and to block the recording mode of terminating point as follows in described step 3 and the step 4:
Each infrared receiving tube of receiver module is divided into M part, and the record touch objects is blocked the number table indicating value of starting point: J
1+ X
1-(m
1/ M), and wherein, X
1The expression touch objects is blocked the infrared receiving tube numbering at starting point place, J
1The true origin of the coordinate system that expression sets from step 1 begins to the first infrared tube of this numbering infrared tube place receiver module infrared tube number of (comprising this first place infrared tube), m
1Represent this numbering infrared tube umber that is blocked, M represents total umber that whole infrared tube is divided into;
The number table indicating value that the record touch objects is blocked terminating point: J
2+ X
2-1+ (m
2/ M), and wherein, X
2The expression touch objects is blocked the infrared receiving tube numbering at terminating point place, J
2The true origin of the coordinate system that expression sets from step 1 begins to the first infrared tube of this numbering infrared tube place receiver module infrared tube number of (comprising this first place infrared tube), m
2Represent this numbering infrared tube umber that is blocked, M represents total umber that whole infrared tube is divided into.
Wherein, J
1And J
2Can be identical.
The method of master microprocessor coordinates computed is in described step 6 and the step 8: 1. the number table indicating value on the X direction that definite touch objects touches is: on the X direction, touch objects is blocked the mean value of the number table indicating value of blocking terminating point of the number table indicating value of starting point and touch objects, i.e. 1/2[J
2+ X
2-1+ (m
2/ M)-J
1-X
1+ (m
1/ M)], the number table indicating value on the y direction also can in like manner be tried to achieve; 2. because the width of each infrared receiving tube can be measured and know, therefore can obtain the physical coordinates of touch objects by the width of number table indicating value and infrared receiving tube; 3. by the physical coordinates of infrared frame and the transformational relation of logical coordinates, can solve the logical coordinates of touch objects.
Utilize said method, can effectively reduce the error of adjacent reception module intersection location, improve the setting accuracy of infrared posting, simultaneously, have fast, the characteristics such as applicability is strong, reliability height of response.
[description of drawings]
Fig. 1 is that syndeton of the present invention concerns synoptic diagram;
Fig. 2 is the infrared tube numbering synoptic diagram of the embodiment of the invention;
Fig. 3 is that the infrared posting coordinate of the present invention forms the method flow synoptic diagram;
Fig. 4 is the infrared frame coordinate system and the location calibration synoptic diagram of the embodiment of the invention;
Fig. 5 is that the infrared frame coordinate of the embodiment of the invention forms situation one synoptic diagram;
Fig. 6 is Fig. 5 embodiment divides signal to infrared tube a local enlarged diagram;
Fig. 7 is that the infrared frame coordinate of the embodiment of the invention forms situation two synoptic diagram;
Fig. 8 is Fig. 7 embodiment divides signal to infrared tube a local enlarged diagram.
[embodiment]
The present invention is described in further detail below in conjunction with drawings and Examples, but embodiments of the present invention are not limited thereto.
Referring to shown in Figure 1, for syndeton of the present invention concerns synoptic diagram.Wherein, being connected with touch-screen from microprocessor in the infrared posting obtained touch objects and blocked locating information, passes through I then
2C interface or SPI interface link to each other with master microprocessor, touch objects is blocked locating information send to master microprocessor, and master microprocessor calculates, and draw the touch coordinate of touch objects, send to computing machine by interface USB interface or RS-232 serial line interface again.
Referring to shown in Figure 2, on longitudinal and transverse direction, arranging the infrared transmission module and the receiver module of many group splicings, the corresponding transmitter module on longitudinal direction and the transverse direction, the strict alignment of receiver module.Wherein corresponding transmitter module, receiver module adopt identical scanning sequency, and adjacent corresponding transmitter module, receiver module adopt different scanning sequencies.To the infrared transmitting tube of each transmitter module numbering, to set out with true origin, on the X direction, the infrared tube of transmitter module SX-0 is numbered 0,1,2......a0, and the infrared tube of transmitter module SX-1 is numbered 0,1,2......a1, so analogizes.On the y direction, the infrared tube of transmitter module SY-0 is numbered 0,1,2......b0, and the infrared tube of transmitter module SY-1 is numbered 0,1,2......b1, so analogizes.To the infrared receiving tube of each receiver module numbering, to set out with true origin, on the X direction, the infrared tube of receiver module RX-0 is numbered 0,1,2......a0, and the infrared tube of receiver module RX-1 is numbered 0,1,2......a1, so analogizes.On the y direction, the infrared tube of receiver module RY-0 is numbered 0,1,2......b0, and the infrared tube of receiver module RY-1 is numbered 0,1,2......b1, so analogizes.
Link to each other by synchronous signal line between each transmitter module, link to each other with bus by synchronous signal line between each receiver module, described each receiver module and transmitter module are by controlling from microprocessor, this infrared positioning touch device also comprises a master microprocessor, this master microprocessor can with one of them from the shared microprocessor of microprocessor.Two or more transmitter modules can be shared one from microprocessor, two or more receiver modules also can be shared one from microprocessor.Linking to each other with master microprocessor by synchronous signal line of transmitter module from microprocessor, linking to each other with master microprocessor with synchronous signal line of receiver module from microprocessor through bus, benchmark synchronizing signal of this master microprocessor output give all transmitter modules from microprocessor and all receiver modules from microprocessor.
The infrared posting coordinate of the present invention forms the method flow synoptic diagram as shown in Figure 3, may further comprise the steps:
Step 1: set coordinate system, position calibration;
Step 2: start the scanning of infrared posting transmitter module and receiver module;
Step 3:, and send to master microprocessor from the starting point of blocking of microprocessor records touch objects;
Step 4:, and send to master microprocessor from the terminating point that blocks of microprocessor records touch objects;
Step 5: master microprocessor judges whether to exist position, the end infrared tube of receiver module A, and the first infrared tube of the receiver module B that is adjacent all detects and be blocked, and if not, enters step 6; If enter step 7;
Step 6: the substitution formula, the master microprocessor coordinates computed, and send to computing machine, return step 2;
Step 7: master microprocessor blocks starting point with the detected starting point of blocking of receiver module A as touch objects, the detected terminating point that blocks that blocks terminating point as touch objects of receiver module B;
Step 8: the substitution formula, the master microprocessor coordinates computed, and send to computing machine, return step 2.
Setting coordinate system and location calibration in the described step 1 as shown in Figure 4, is initial point O with the touch-screen lower left corner, and longitudinal direction is a Y-axis, and horizontal direction is an X-axis.By setting two calibration coordinate points A and B that horizontal ordinate is inequality, ordinate is all inequality, set up the transformational relation of physical coordinates and logical coordinates, realize the location calibration of coordinate.
Touch objects is blocked starting point and to block the recording mode of terminating point as follows in described step 3 and the step 4:
In the present embodiment, according to the relation of infrared receiving tube luminous flux size with its output voltage size, the width of each infrared receiving tube of receiver module is divided into 16 parts, and by the infrared receiving tube output voltage being carried out the A/D conversion, and the width that is blocked with it is set up corresponding relation.
Shown in Fig. 5,6, be infrared frame coordinate formation situation one synoptic diagram of the embodiment of the invention.The infrared receiving tube that this moment, touch objects was blocked is on same infrared receiving module.
Detect on the X-axis, touch objects block the X of starting point at infrared receiving module RX-k
1The m of individual infrared receiving tube
1/ 16 places, then write down touch objects and block the number table indicating value of starting point X-direction and be:
X
Rise=J
1+ X
1-(m
1/ 16)
J wherein
1The true origin of the coordinate system that expression sets from step 1 begins to the first infrared tube of this numbering infrared tube place receiver module infrared tube number of (comprising this first place infrared tube).
In like manner can draw the number table indicating value of the Y direction of blocking starting point;
Detect on the X-axis, touch objects block the X of terminating point at infrared receiving module RX-k
2The m of individual infrared receiving tube
2/ 16 places, the number table indicating value of blocking the terminating point X-direction that then writes down touch objects is:
X
Eventually=J
1+ X
2-1+ (m
2/ 16)
J wherein
1The true origin of the coordinate system that expression sets from step 1 begins to the first infrared tube of this numbering infrared tube place receiver module infrared tube number of (comprising this first place infrared tube).
In like manner can draw the number table indicating value of the Y direction of blocking terminating point.
From the blocking starting point coordinate and block the terminating point coordinate of the above-mentioned touch objects of microprocessor records, and link to each other with master microprocessor, touch objects is blocked locating information send to master microprocessor by I2C interface or SPI interface.
The method of master microprocessor coordinates computed is in described step 6 and the step 8: 1. the number table indicating value is on the X-direction that definite touch objects touches: X
Horizontal=1/2[X
2-1+ (m
2/ 16)-X
1+ (m
1/ 16)], the number table indicating value also can use the same method and obtains on the Y direction; 2. because the width of each infrared receiving tube can be measured and know, therefore can obtain the physical coordinates of touch objects by the width of number table indicating value and infrared receiving tube; 3. by the physical coordinates of infrared frame and the transformational relation of logical coordinates, can solve the logical coordinates of touch objects.Ordinate is identical with the computing method of horizontal ordinate.
Master microprocessor calculates, draw the logical coordinates of touch objects after, send to computing machine by interface USB interface or RS-232 serial line interface again.
Shown in Fig. 7,8, be infrared frame coordinate formation situation two synoptic diagram of the embodiment of the invention.The infrared receiving tube that this moment, touch objects was blocked has been crossed over two infrared receiving modules.
What at this moment, receiver module RX-k detected touch objects blocks starting point at its X
1The m of individual infrared receiving tube
1/ 16 places, therefore, the starting point number table indicating value of blocking of this receiver module is:
X
Play 1=J
1+ X
1-(m
1/ 16)
Wherein, J
1The true origin of the coordinate system that expression sets from step 1 begins to the first infrared tube of this numbering infrared tube place receiver module infrared tube number of (comprising this first place infrared tube).
The detected terminating point number table indicating value of blocking of receiver module RX-k is:
X
Whole 1=J
1+ a
k-1+16/16=J
1+ a
k
Wherein, a
kPosition, end infrared tube numbering for receiver module R-k; J
1The true origin of the coordinate system that expression sets from step 1 begins to the first infrared tube of this numbering infrared tube place receiver module infrared tube number of (comprising this first place infrared tube).
The detected starting point number table indicating value of blocking of receiver module RX-k+ 1 is:
X
Play 2=J
2-1
Wherein, J
2The true origin of the coordinate system that expression sets from step 1 begins to the first infrared tube of this numbering infrared tube place receiver module infrared tube number of (comprising this first place infrared tube).
What receiver module RX-k+ 1 detected touch objects blocks terminating point at its X
4The m of individual infrared receiving tube
4/ 16 places, therefore, the terminating point number table indicating value of blocking of this receiver module is:
X
Whole 2=J
2+ X
4-1+ (m
4/ 16)
Wherein, J
2The true origin of the coordinate system that expression sets from step 1 begins to the first infrared tube of this numbering infrared tube place receiver module infrared tube number of (comprising this first place infrared tube).
By step 5, master microprocessor is judged position, the end infrared tube there is receiver module 2, and the first infrared tube of the receiver module 3 that is adjacent all detects and be blocked, and enters step 7.Master microprocessor is with the receiver module 2 detected starting point number table indicating value X that block
Play 1=J
1+ X
1-(m
1/ 16) block starting point number table indicating value as touch objects, the receiver module 3 detected terminating point number table indicating value X that block
Whole 2=J
2+ X
4-1+ (m
4/ 16) as touch objects block terminating point number table indicating value, the substitution formula calculates again, determines that the number table indicating value that touch objects touches on the X-direction is: X
Horizontal=1/2[J
2+ X
4-1+ (m
4/ 16)-J
1-X
1+ (m
1/ 16)].In like manner can solve the number table indicating value on the touch objects Y direction.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (4)
1, a kind of coordinate formation method of infrared posting is characterized in that it comprises the steps:
(1): start the scanning of infrared posting transmitter module and receiver module;
(2): from the microprocessor records touch objects block starting point and block terminating point, and send to master microprocessor;
(3): master microprocessor judges whether to exist: the first infrared tube of the end position infrared tube of receiver module A and the receiver module B that is adjacent all detects and is blocked, and if not, enters step (4); If enter step (5);
(4): the substitution formula, the master microprocessor coordinates computed, and send to computing machine, return step (1);
(5): master microprocessor blocks starting point with the detected starting point of blocking of receiver module A as touch objects, the detected terminating point that blocks that blocks terminating point as touch objects of receiver module B;
(6): the substitution formula, the master microprocessor coordinates computed, and send to computing machine, return step (1).
The middle touch objects of described step (2) is blocked starting point: each infrared receiving tube of receiver module is divided into M part, the number table indicating value of blocking starting point and blocking terminating point of record touch objects.
Formula in described step (4) and the step (6) is a physical coordinates of obtaining touch objects by the width of described number table indicating value and infrared receiving tube, and the physical coordinates by infrared frame and the transformational relation of logical coordinates are obtained the logical coordinates of touch objects.
2, the coordinate formation method of infrared posting as claimed in claim 1 is characterized in that,
Touch objects is blocked the number table indicating value of starting point: J
1+ X
1-(m
1/ M), and wherein, X
1The expression touch objects is blocked the infrared receiving tube numbering at starting point place, J
1The true origin of the coordinate system that expression sets from step 1 begins to the infrared tube number of the first infrared tube of this numbering infrared tube place receiver module, m
1Represent this numbering infrared tube umber that is blocked;
Touch objects is blocked the number table indicating value of terminating point: J
2+ X
2-1+ (m
2/ M), and wherein, X
2The expression touch objects is blocked the infrared receiving tube numbering at terminating point place, J
2The true origin of the coordinate system that expression sets from step 1 begins to the infrared tube number of the first infrared tube of this numbering infrared tube place receiver module, m
2Represent this numbering infrared tube umber that is blocked;
Wherein, J
1And J
2Can be identical.
3, the coordinate formation method of infrared posting as claimed in claim 2 is characterized in that,
Determine in described step (4) and the step (6) that transverse axis and the number table indicating value on the y direction that touch objects touches are 1/2[J
2+ X
2-1+ (m
2/ M)-J
1-X
1+ (m
1/ M)].
4, the coordinate formation method of infrared posting as claimed in claim 1 is characterized in that, sets out with true origin, numbers for infrared transmitting tube and infrared receiving tube on transverse axis and the y direction respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100384918A CN101581999B (en) | 2009-04-08 | 2009-04-08 | Method for forming coordinates of infrared positioning frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100384918A CN101581999B (en) | 2009-04-08 | 2009-04-08 | Method for forming coordinates of infrared positioning frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101581999A true CN101581999A (en) | 2009-11-18 |
| CN101581999B CN101581999B (en) | 2011-03-16 |
Family
ID=41364165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100384918A Expired - Fee Related CN101581999B (en) | 2009-04-08 | 2009-04-08 | Method for forming coordinates of infrared positioning frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101581999B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109932A (en) * | 2009-12-26 | 2011-06-29 | 乐金显示有限公司 | Optical touch input system and method of establishing reference in the same |
| CN106371674A (en) * | 2016-09-09 | 2017-02-01 | 青岛海信电器股份有限公司 | Method and device for locating touch on infrared touch screen |
-
2009
- 2009-04-08 CN CN2009100384918A patent/CN101581999B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109932A (en) * | 2009-12-26 | 2011-06-29 | 乐金显示有限公司 | Optical touch input system and method of establishing reference in the same |
| US8803845B2 (en) | 2009-12-26 | 2014-08-12 | Lg Display Co., Ltd. | Optical touch input system and method of establishing reference in the same |
| CN102109932B (en) * | 2009-12-26 | 2014-11-26 | 乐金显示有限公司 | Optical touch input system and method of establishing reference in the same |
| CN106371674A (en) * | 2016-09-09 | 2017-02-01 | 青岛海信电器股份有限公司 | Method and device for locating touch on infrared touch screen |
| CN106371674B (en) * | 2016-09-09 | 2019-03-08 | 青岛海信电器股份有限公司 | The touch localization method and device of infrared touch panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101581999B (en) | 2011-03-16 |
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Address after: 510670 Guangdong Province, Guangzhou high tech Industrial Development Zone Kezhu Road No. 233 Patentee after: Wei Chong group Limited by Share Ltd Address before: 510663 Guangzhou province high tech Industrial Development Zone, Guangdong, Cai road, No. 6, No. Patentee before: Guangdong Weichuangshixun Science and Technology Co., Ltd. |
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