CN102346602A - Multi-point touch display screen device - Google Patents
Multi-point touch display screen device Download PDFInfo
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- CN102346602A CN102346602A CN2011101825296A CN201110182529A CN102346602A CN 102346602 A CN102346602 A CN 102346602A CN 2011101825296 A CN2011101825296 A CN 2011101825296A CN 201110182529 A CN201110182529 A CN 201110182529A CN 102346602 A CN102346602 A CN 102346602A
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Abstract
The invention discloses a multi-point touch display screen device, comprising at least two horizontal 1-shaped infrared laser sources, infrared emission modules, infrared receiving modules, an infrared camera and a master control module, wherein the at least two horizontal 1-shaped infrared laser sources are arranged at corners of a touch display screen; the infrared receiving modules and the infrared receiving modules are arranged on four edges of the touch display screen; the infrared camera is arranged on the back face of the touch display screen; the master control module is respectively connected with the infrared emission modules, the infrared receiving modules, the horizontal 1-shaped infrared laser sources and the infrared camera and used for controlling the operation of the infrared emission modules, the infrared receiving modules, the horizontal 1-shaped infrared laser sources and the infrared camera; the horizontal 1-shaped infrared laser sources and the infrared camera work synchronously to shoot an image of the entire touch display screen, and the master control module is used for calculating the range of a touch point according to the image; the infrared emission modules and the infrared receiving modules are used for performing infrared scanning on the touch display screen to acquire dodging line information; and the master control module is used for calculating coordinates of intersection points of dodging lines and judging the coordinate of the touch point according to the coordinates of the intersection points of the dodging lines and the range of the touch point. According to the technology provided by the invention, multi-point touch can be performed effectively, and the phenomenon of false judgment caused by closer touch points is avoided.
Description
Technical field
The present invention relates to the touch display screen technology, particularly a kind of multiple point touching display device.
Background technology
The electronic touch technology provides great convenience to man-machine interaction mode, technical multiple solution is provided also, and Performance And Reliability is also perfect constantly.The touching device that occurs an a kind of infrared word LASER Light Source in the market can really be realized multiple point touching with it, and can realize zero pressure to touch and be well received by the public; Like the patent No. is that disclosed infrared hyphen laser multi-touch screen device of CN101770314A and touch localization method form one deck infrared ray plane through an infrared word laser instrument in touch screen surface; When objects such as finger were pressed close to touch-screen, the infrared ray on the infrared ray plane was reflected, and formed bright spot; Infrared camera captures these bright spots; And picture passed to computing machine, computing machine carries out Treatment Analysis, identifies the touch point.But when adjacent two or more touch points are leaned on closerly; Because there is diversity in the bright spot of the infrared that camera photographs; Can cause these touch points are used as is a touch point; Thereby cause erroneous judgement, in many people operating process simultaneously, the degree of accuracy of touch recognition is lower especially.
Summary of the invention
In order to address the above problem, the present invention provides a kind of multiple point touching display device.
A kind of multiple point touching display device comprises:
At least two word line infrared laser light sources that are installed in the touch display screen corner, be installed in infrared transmission module and the infrared receiving module on the touch display screen surrounding, the infrared camera that is installed in the touch display screen back side and main control module;
Said main control module connects said infrared transmission module and infrared receiving module, word line infrared laser light source and infrared camera respectively, and controls the operation of said infrared transmission module and infrared receiving module, word line infrared laser light source and infrared camera;
Said word line infrared laser light source emission infrared laser, said infrared camera is taken the image of whole touch display screen simultaneously;
Said main control module reads the image that said infrared camera is taken, and according to the scope of said image calculation touch point;
Said infrared transmission module of said master control module controls and said infrared receiving module carry out infrared scan to touch display screen and obtain the line information of blocking on the touch display screen;
Said main control module read said block line information and calculate block the line intersecting point coordinate, judge the touch point coordinate according to this scope of blocking line intersecting point coordinate and said touch point then.
Compared with prior art, touching technique of the present invention utilizes shooting to obtain the image of touch display screen in real time through the comprehensive mode that adopts shooting and infrared scan; Can carry out multiple point touching effectively, can many people operate simultaneously, simultaneously; In carrying out multiple point touching operation, the touch point scope of obtaining according to shooting is in conjunction with the characteristic of infrared scan net height resolution; The coordinate of each touch point of accurate Calculation has avoided independent employing shooting mode to touch in the position fixing process, the phenomenon of the erroneous judgement that produces because the touch point is nearer apart; Improve the degree of accuracy of touch recognition, realized high-resolution touch location.
Description of drawings
Fig. 1 is the structural representation of the multiple point touching display device in the present embodiment;
Fig. 2 is the synoptic diagram of the formed infrared scan net of infrared transmission module and infrared receiving module;
Fig. 3 is the working timing figure of the multiple point touching display device in the instance;
Fig. 4 is the method flow diagrammatic sketch that multiple point touching display device of the present invention touches the location;
Fig. 5 is the exemplary plot of the application example among the embodiment.
Embodiment
Below in conjunction with accompanying drawing and embodiment technology of the present invention is described in detail.
Referring to Fig. 1, Fig. 1 is the structural representation of the multiple point touching display device in the present embodiment.
Comprise: the word line infrared laser light source 106,107,108,109 that is installed in touch display screen 101 corners; Be installed in infrared transmission module 102,103 and infrared receiving module 104,105 on touch display screen 101 4 limits; Be installed in the infrared camera 110 at touch display screen 101 back sides, and main control module 111;
Wherein, Main control module 111 connects said infrared transmission module 102,103 and infrared receiving module 104,105 respectively; Word line infrared laser light source 106,107,108,109, and infrared camera 110, and control said infrared transmission module 102,103 and infrared receiving module 104,105; Word line infrared laser light source 106,107,108,109, and the operation of infrared camera 110.
Said word line infrared laser light source 106,107,108,109 emission infrared lasers, simultaneously said infrared camera 111 is taken the image of whole touch display screen;
Said main control module 111 reads the image that said infrared camera 110 is taken, and according to the scope of these image calculation touch points;
The said main control module 111 said infrared transmission modules 102,103 of control and 104,105 pairs of touch display screens 101 of said infrared receiving module carry out infrared scan and obtain the line information of blocking on the touch display screen 101;
Said main control module 111 read said block line information and calculate block the line intersecting point coordinate, judge the touch point coordinate according to this scope of blocking line intersecting point coordinate and said touch point then.
For said word line infrared laser light source; At least comprise two; Preferably, adopt four word line infrared laser light sources, said word line infrared laser light source 106,107,108,109 formed infrared laser planes can cover whole touch display screen 101; Said infrared camera 110 can be taken the image of whole touch display screen 101.
Particularly, infrared transmission module 102,103 and infrared receiving module 104,105 can form the infrared scan net on the surface of touch display screen 101, and referring to Fig. 2, Fig. 2 is the synoptic diagram of the formed infrared scan net of infrared transmission module and infrared receiving module.
Said infrared transmission module 102,103 comprises some infrared transmitting tubes; Infrared receiving module 104,105 comprises some infrared receiving tubes; The pairing of infrared transmitting tube and infrared receiving tube is installed in respectively on the relative limit of touch display screen 101, and is as shown in Figure 1; Infrared receiving tube pairing in the infrared transmitting tube of infrared transmission module 102 and the infrared receiving module 104, the infrared receiving tube pairing in the infrared transmitting tube of infrared transmission module 103 and the infrared receiving module 105.
The infrared laser of being launched for fear of word line infrared laser light source 106,107,108,109 influences the scanning of infrared transmission module 102,103 and infrared receiving module 104,105; So; Preferably; Said infrared transmission module 102,103 and infrared receiving module 104,105 are set when in running order, said word line infrared laser light source 106,107,108,109 and infrared camera 110 are in off working state; When said word line infrared laser light source 106,107,108,109 and infrared camera 110 are in running order; Said infrared transmission module 102,103 and infrared receiving module 104,105 are in off working state; Referring to Fig. 3; Fig. 3 is the working timing figure of an instance of multiple point touching display device of the present invention; Said word line infrared laser light source 106,107,108,109 and infrared camera 110, said infrared transmission module 102,103 and infrared receiving module 104,105 are all operated by the preset working cycle, and be in running order during high level, is in off working state during low level.
Referring to Fig. 4, Fig. 4 is the method flow diagrammatic sketch that multiple point touching display device of the present invention touches the location, in the concrete work:
Under the control of main control module 111; Four word line infrared laser light sources 106,107,108,109 are synchronoused working with infrared camera 111; Take the image that obtains touch display screen 101; In this process; When touch display screen 101 is placed with when touching object, 106,107,108,109 emissions of word line infrared laser light source the part infrared laser on the formed infrared laser of infrared laser plane overflow the back side that can be reflected to touch display screen 101, infrared camera 110 just can photograph the image of bright spot.
Preferably, the step of infrared camera photographic images comprises:
Be under the no touch state at touch display screen 101, control said word line infrared laser light source 106,107,108,109 emission infrared lasers, control the background image that said infrared camera 110 is taken whole touch display screen 101 simultaneously;
Be under the normal operating conditions at touch display screen 101; Control said word line infrared laser light source 106,107,108,109 emission infrared lasers; With frequency preset, control the realtime graphic that said infrared camera 110 is taken whole touch display screen 101 simultaneously.
Said background image and realtime graphic are obtained doing difference figure as difference operation, then this work difference figure is carried out binary conversion treatment;
Particularly, preset gray scale threshold values is adjudicated the said plain gray-scale value of difference image of doing; If exist gray-scale value to surpass the pixel of said gray scale threshold values, judge that then the scope of this pixel is denoted as the touch point scope;
Further, the pixel that gray-scale value surpasses said gray scale threshold values is set to white, and the gray-scale value pixel that is no more than said gray scale threshold values is set to black simultaneously.
For example, setting gray threshold is 210, then will make the gray-scale value of difference in scheming and be made as white greater than 210 pixel, gray-scale value is less than or equal to 210 pixel and is made as black.
If do not exist gray-scale value to surpass the pixel of this gray scale threshold values among the difference figure, the current touch operation that do not exist then is described, continue to handle next realtime graphic.
After obtaining the touch point scope, main control module 111 controls infrared transmission module 102,103 again and infrared receiving module 104,105 carries out infrared scan in this touch point scope, obtains the line information of blocking of touch display screen 101.
For infrared scan, particularly, according to the scope of said touch point, control covers the corresponding infrared transmitting tube emission infrared signal of scope of this touch point, and control simultaneously receives said infrared signal with the infrared receiving tube of this infrared transmitting tube pairing.
Preferably; Obtaining the mode of blocking line information is: preset infrared signal intensity threshold values; The judgement infrared receiving tube receives the intensity of infrared signal, if less than said intensity threshold values, forms according to the position line of this infrared receiving tube and corresponding infrared transmitting tube thereof and to block line; Each bar blocks line and forms the intersection point that blocks line in the intersection, and the position of these intersection points has comprised the touch point.
In a preferred embodiment; Word line infrared laser light source 106,107,108,109 can be in emission state always; Said infrared camera is taken the realtime graphic of whole touch display screen with frequency preset simultaneously; Before obtaining the touch point scope through the mode of taking; Control said control infrared transmission module 102,103 and infrared receiving module 104,105 and be in sleep state (off working state), after definite touch point and scope thereof, restart control infrared transmission module 102,103 and infrared receiving module 104,105 and carry out infrared scan; Close word line infrared laser light source 106,107,108,109 and infrared camera simultaneously; After the completion to be scanned, restart word line infrared laser light source 106,107,108,109 and infrared camera, control infrared transmission module 102,103 and infrared receiving module 104,105 entering sleep states simultaneously.
For deterministic process, particularly, if the said line intersecting point coordinate that blocks in said white pixel scope, judges that then this intersecting point coordinate is the touch point coordinate; If the said line intersecting point coordinate that blocks in said black picture element scope, judges that then this intersecting point coordinate is a non-touch point coordinate.
Referring to Fig. 5, Fig. 5 is the exemplary plot according to an application example of present embodiment generation.
When A, two touch points that are separated by nearer of B; Mode through the camera shooting; Judged touch point A, B and confirmed that its region is (owing to A, two touch points of B are separated by nearer; What therefore the camera shooting obtained is a connected region), this zone is a white pixel, can confirm the maximal value Xmax of horizontal ordinate, the little value Xmin of horizontal ordinate, the maximal value Ymax of ordinate, the little value Ym of ordinate from the scope of this white pixel; And,,, be the sweep limit of infrared transmission module on the y direction 103 and infrared receiving module 105 with from Ymin to Ymax for the sweep limit of infrared transmission module on the X direction 102 and infrared receiving module 104 with from Xmin to Xmax.
Because the resolution of infrared scan net is very high, can effectively identify apart from being separated by very near touch point, the line of supposing to read on the X direction that blocks is respectively line L1, L2, and the line that blocks that reads on the y direction is respectively line L3, L4.
Blocking line L1, L2, L3, the formed line intersection point that blocks of L4 is Q1, Q2, Q3, Q4, and main control module 111 calculates the coordinate of these intersection points.If intersecting point coordinate in the white pixel scope of said work difference figure, is then thought the touch point.
Through judging, obtain Q1, Q3 coordinate in the determined regional extent of touch point A, B, thus judge that Q1, Q3 are the touch points, intersecting point coordinate Q1 (x1, y1) then, Q3 (x3, y3) is the coordinate of touch point; And intersection point Q2, Q4 are in the white pixel scope of making difference figure, so judge that Q2, Q4 are not the touch points.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (10)
1. a multiple point touching display device is characterized in that, comprising:
At least two word line infrared laser light sources that are installed in the touch display screen corner, be installed in infrared transmission module and the infrared receiving module on the touch display screen surrounding, the infrared camera that is installed in the touch display screen back side and main control module;
Said main control module connects said infrared transmission module and infrared receiving module, word line infrared laser light source and infrared camera respectively, and controls the operation of said infrared transmission module and infrared receiving module, word line infrared laser light source and infrared camera;
Said word line infrared laser light source emission infrared laser, said infrared camera is taken the image of whole touch display screen simultaneously;
Said main control module reads the image that said infrared camera is taken, and according to the scope of said image calculation touch point;
Said infrared transmission module of said master control module controls and said infrared receiving module carry out infrared scan to touch display screen and obtain the line information of blocking on the touch display screen;
Said main control module read said block line information and calculate block the line intersecting point coordinate, judge the touch point coordinate according to this scope of blocking line intersecting point coordinate and said touch point then.
2. device according to claim 1 is characterized in that,
Said infrared transmission module comprises infrared transmitting tube, and said infrared receiving module comprises infrared receiving tube; Said infrared transmitting tube and infrared receiving tube pairing are installed in respectively on the relative limit of touch display screen.
3. device according to claim 1 is characterized in that, the quantity of said word line infrared laser light source is four, is installed in four corners of touch display screen respectively.
4. device according to claim 2 is characterized in that,
When said infrared receiving module and infrared receiving module were in running order, said word line infrared laser light source and infrared camera were in off working state;
When said word line infrared laser light source and infrared camera were in running order, said infrared receiving module and infrared receiving module were in off working state.
5. device according to claim 1 is characterized in that, the step of said infrared camera photographic images comprises:
Be under the no touch state at touch display screen, control said word line infrared laser light source emission infrared laser, control the background image that said infrared camera is taken whole touch display screen simultaneously;
Under touch display screen is in normal operating conditions, control said word line infrared laser light source emission infrared laser, control said infrared camera is taken whole touch display screen with frequency preset realtime graphic simultaneously.
6. device according to claim 5 is characterized in that, the step of the scope of the said image calculation touch point of taking according to said infrared camera comprises:
Said background image and realtime graphic are obtained doing difference figure as difference operation, and judge the scope of touch point according to said work difference figure.
7. device according to claim 6 is characterized in that, saidly judges that according to said work difference figure the step of the scope of touch point comprises:
Preset gray scale threshold values is adjudicated the said plain gray-scale value of difference image of doing;
If exist gray-scale value to surpass the pixel of said gray scale threshold values, the scope of then judging this pixel is the touch point scope.
8. device according to claim 7 is characterized in that, saidly judges that according to said work difference figure the step of the scope of touch point further comprises:
The pixel that gray-scale value surpasses said gray scale threshold values is set to white, and the gray-scale value pixel that is no more than said gray scale threshold values is set to black simultaneously.
9. device according to claim 2 is characterized in that, the said scope that touch display screen is carried out infrared scan is the scope of said touch point;
The step of said infrared scan comprises:
According to the scope of said touch point, control covers the corresponding said infrared transmitting tube emission infrared signal of scope of said touch point, controls the intensity level that reads the said infrared signal that receives with the said infrared receiving tube of this infrared transmitting tube pairing simultaneously.
10. according to Claim 8 or 9 described devices, it is characterized in that the step that said main control module is judged the touch point coordinate according to the scope of blocking line intersecting point coordinate and said touch point comprises:
If the said line intersecting point coordinate that blocks in said white pixel scope, judges that then this intersecting point coordinate is the touch point coordinate;
If the said line intersecting point coordinate that blocks in said black picture element scope, judges that then this intersecting point coordinate is a non-touch point coordinate.
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| CN2011101825296A CN102346602A (en) | 2011-07-01 | 2011-07-01 | Multi-point touch display screen device |
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| CN2011101825296A CN102346602A (en) | 2011-07-01 | 2011-07-01 | Multi-point touch display screen device |
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Cited By (3)
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| CN107071092A (en) * | 2016-07-16 | 2017-08-18 | 叶大可 | A kind of smart mobile phone |
| CN112462983A (en) * | 2020-12-17 | 2021-03-09 | 中国农业银行股份有限公司 | Non-contact input equipment and method for determining character input value |
| CN112637575A (en) * | 2020-12-14 | 2021-04-09 | 四川长虹电器股份有限公司 | Automatic image correction system and method for ultra-short-focus laser projector |
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Application publication date: 20120208 |