CN101271372A - Multi-point touch panel - Google Patents
Multi-point touch panel Download PDFInfo
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- CN101271372A CN101271372A CNA2008100247704A CN200810024770A CN101271372A CN 101271372 A CN101271372 A CN 101271372A CN A2008100247704 A CNA2008100247704 A CN A2008100247704A CN 200810024770 A CN200810024770 A CN 200810024770A CN 101271372 A CN101271372 A CN 101271372A
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- sensor
- touch panel
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- point touch
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
- G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/048—Indexing scheme relating to G06F3/048
- G06F2203/04808—Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
Abstract
The invention provides a multi-point touch screen, which is a rectangular frame structure. The surrounding area of the frame is matched with the display screen area for installing the touch screen; an illuminating belt matched with the side length of the frame is arranged beside the frame to be as a reference; the illuminating belt reference surrounds an identification area, a sensor component is arranged on the corner of the frame; the sensor component includes an image sensor, an optical lens and a light filter. With 90-degree visual angle of the senor paralleling above the direction of the recognized area, the sensor covers the whole identification area; the visual angle vertical to the direction of the identification area ensures that the reference is in the visual angle of the sensor and the object entering the identification area to be captured by the sensor. The sensor is connected with a controller; the controller is provided with a communication port connected with an upper computer for data communication; the controller includes data for controlling a code reading sensor and the controller or the upper computer includes data processing code for handling the sensor data. The position and the size of the touch object are calculated according to the data. The touch screen achieves a large-size multi-point touch screen at low cost.
Description
Technical field
The present invention relates to be used for the touch-screen of human-computer interaction interface.
Background technology
Medium according to the principle of work of touch-screen and transmission information, we are divided into four kinds to touch-screen, they are respectively resistance-type, infrared-type, capacitor induction type and surface acoustic wave type, also have some to use less technical scheme, for example (optical image recognition mode (publication number CN 1635541A is hereinafter to be referred as the A scheme)).Resistance-type, infrared-type, capacitor induction type and surface acoustic wave type touch-screen all have a deadly defect, that is exactly that cost is along with the size increase is geometric growth, large-sized touch-screen does not almost have civilian, though the A scheme can solve this problem of cost of large scale touch-screen, but a lot of restrictions are arranged in actual applications, and practical value is low.The prerequisite of A scheme is that its sensor is wanted to capture correct data, if the data that capture are that wrong all are white what is said or talked about so.The A scheme is directly to obtain the data that touch object, and the light on the sensor touches object owing to there is uncertainty (the reflective degree on surface and distance of sensor or the like) we can say and is difficult for Direct Recognition from touching object.Because the structural limitations of A scheme also can't be made accurate identification for touch action.The single-point touches that how much is divided into again according to the identification touch point is shielded and multi-point touch panel, the single-point touches screen is only to discern a touch point, multi-point touch panel can be discerned a plurality of touch points, shield with respect to single-point touches, the multi-point touch panel structure is complicated more, price is also expensive more, and the large scale multi-point touch panel is nearly all in the experimental phase at present.
Summary of the invention
The present invention need solve following problem: reduce the cost of large scale touch-screen, solve the defective of A scheme, the identification of multiple touch points is provided.
The technical solution adopted in the present invention is as follows:
A kind of multi-point touch panel, it comprises: 1. line illustration image-position sensor; 2. optical filter; 3. optical lens; 4. self luminous object of reference; 5. controller, described multi-point touch panel is a rectangular frame structure, framework enclosing region size and the display screen viewing area size cooperation that touch-screen is installed, the leg of frame is equipped with 4 luminous zones that cooperate with framework four edges length as luminous object of reference, the very thin space that is parallel to display screen that the autoluminescence object of reference surrounds is an identified region, the thickness of object of reference thickness decision identified region, at least on 3 angles of framework, sensor module is installed, sensor module is by the line illustration image-position sensor, optical lens, optical filter is formed, the visual angle that sensor is parallel on the identified region direction is that 90 degree cover whole identified region, to guarantee that perpendicular to the visual angle on the identified region direction object of reference is in the visual angle of sensor, the object that enters identified region can be caught by sensor, sensor is connected with controller, simultaneously controller has a communication port to be connected with host computer to carry out data communication, the data that in controller, comprise the control routine read sensor, in controller or host computer, comprise the data that the data processing code is used for processes sensor, go out to touch the position and the size of object according to data computation.
Because the restriction of optical imagery is the blind area near close optical lens; Simultaneously the mathematical principle according to native system also is the blind area on the line of 2 sensor modules, so at least 3 sensor modules could guarantee the accuracy discerned.Consider that all to place sensor be a reasonable plan for 4 angles that are identified in of multiple touch points, can increase sensor module in the optional position on framework 4 limits if improve the discrimination of multiple touch points.During system works, the light that object of reference sends is by optical lens imaging on sensor, what become similarly is a continuous segments, touch objects cognition is blocked object of reference when touch screen, at this moment have the shade of interruption in the middle of the continuous segments, can calculate the angle zone, orientation that touches object according to the relative position of shade on continuous line segment, position, the sizes that can obtain touching object are intersected in the angle zone, orientation that at least two sensors obtain, and the mathematical principle that the present invention follows is that two straight lines intersect and have and have only an intersection point on the plane.The data that controller is read each sensor by certain frequency circulation are handled the acquisition net result by controller or host computer to data again.
Above-mentioned multi-point touch panel, described line illustration image-position sensor can be the linear sensors of black and white, the linear sensor of gray scale or the sensor of face battle array.
Above-mentioned multi-point touch panel, preferably 4 jiaos at framework are equipped with sensor module.
Above-mentioned multi-point touch panel in order to improve the discrimination of multiple touch points, can increase sensor module in the framework optional position.
Above-mentioned multi-point touch panel, the wavelength and the optical filter of luminous object of reference match.
Above-mentioned multi-point touch panel, the infrared band that the wavelength of luminous object of reference preferably can't be discerned at human eye.
Touch-screen of the present invention belongs to the optical image recognition structure, this structure identification touches object 2 difficult points, 1) touch objects surface reflectivity has nothing in common with each other, be reflected on the sensor is exactly that the strong and weak variation range of light is huge, the fixing value of basic neither one is distinguished useful signal and undesired signal, also do not deal with problems even increase illumination, this all is an acid test to sensor and recognizer.2) touch action of touch object is being the displacement of several mm perpendicular to touching on the in-plane, and it is a small variation that this displacement is reflected on the sensor, discern this subtle change, almost is impossible.Use a luminous object of reference to satisfactorily resolve this 2 difficult problems among the present invention, for difficult point 1, the use of luminous object of reference has obtained the recognition object of a constant luminance, as long as guaranteeing object of reference has been object the brightest in the identification range, originally the signal that by every possible means will catch is the undesired signal that will filter now entirely, can be easy to distinguish useful signal and undesired signal with a fixed value.We can do an experiment for difficult point 2, on the white wall individual object are arranged, and now eye are closed, and movement of objects 1mm, eyes are opened, and whether nobody can tell mobile.Draw the bar line at object next door 1mm now, movement of objects 1mm just in time presses on line, and at this moment whether anyone can tell object at a glance and moved, and the use of object of reference zooms into the great variety that a glance can be discerned to the subtle change that originally can't discern.
The present invention only need select the sensor of different resolution, different size for use when being applied on the touch-screen of different size, the object of reference of different length, there is not too big variation on the cost, and the requirement to sensor is lower than present technical merit, on cost, have great advantage, congenital support multiple touch points has been realized large-sized multi-point touch panel with a kind of cheap price simultaneously.
Description of drawings
Fig. 1 goes out to touch the orientation angle area schematic of object for the data computation that obtains according to sensor, wherein: rectangle abcd is the touch area, Bian Yiquan around the zone is placed with object of reference ab, bc, cd and da, be placed with sensor C1 at a angle, the sensor plane miter angle is installed, t is for touching object, line segment xy is object of reference bc, the imaging of cd on sensor C1, line segment uv touches object to block the shade of object of reference on C1, can calculate angle zone, the orientation aef of t according to the relative position of uv on xy, ask angle zone, orientation aef, ask angle α β exactly, tan α=vz/za, the sensor miter angle is installed, vz=yz then, so tan α=yz/za, vz is parallel with xa, so yv/vx=yz/za tan α=yv/vx then, α=arctan (yv/vx), because pixel size is all the same, so according to the data of sensor, statistics number down is easy to obtain yv/vx, in like manner can obtain β, obtain and just can obtain angle zone, orientation aef behind the α β.
Fig. 2 intersects position, the size that can obtain touching object for the angle zone, orientation that obtains according to two sensors, wherein: t is for touching object, orientation angle zone aef is that the data computation according to the C1 sensor obtains, orientation angle zone bgh is that the data computation according to the C2 sensor obtains, polygon 1mno is the intersecting area of orientation angle zone aef and bgh, just touches the position of object.
Fig. 3 respectively has a sensor for four angles of touch area abcd, and 3 touch points are arranged.
Fig. 4 is that 3 polygon shadow regions are intersecting area and those 3 the touch point correspondences of Fig. 3 that calculate.
Fig. 5 is for touching object and block object of reference imaging synoptic diagram perpendicular to touching on the in-plane, wherein: 1 be the sensor imaging plane, and p is the display screen plane, and m is an object of reference, and α is the sensor visual angle, and the visual angle is that the length by the sensor pixel vertical direction determines.Abc is 3 and touches objects, a object outside the sensor visual angle, system identification no touch point, b object in the sensor visual angle but do not block object of reference, system identification no touch point, the c object has blocked object of reference, system identification has the touch point.
Fig. 6 is the structural representation of multi-point touch panel of the present invention, and wherein: 101 is sensor; 102 is sensor; 103 is sensor; 104 is sensor; 105 is the LED light belt; 106 is the LED light belt; 107 is the LED light belt; 108 is the LED light belt; 109 is lens; 110 is optical filter (wavelength 850nm); 111 is housing.
Fig. 7 is Fig. 6 upper left corner 3D structural drawing, and other each angle and this structure are identical.
Fig. 8 is the identification synoptic diagram of 4 touch points in the multi-point touch panel, and wherein: 301 is the touch point; 302 is the touch point; 303 is the touch point; 304 is the touch point.
Fig. 9 is the control circuit block diagram, and wherein: 401 is that mcu 402 is host computer.
Figure 10 is the structural representation of autoluminescence object of reference, and wherein: 501 is LED; 502 is light guide plate; 503 is diffusion layer.
Figure 11 is self-defined sensor module encapsulating structure synoptic diagram, and wherein: 601 is chip; 602 is prism; 603 is lens; 604 is optical filter; 605 is pin; 606 is shell.
Embodiment
Embodiment 1.
50 inches 16: 9 touch-screens, one-piece construction as shown in Figure 6.
Line Chart image-position sensor 101,102,103 and 104 is selected SONY production, model ILX5112048-pixel CCDLinear Image Sensor (B/W), 4, Pixel Dimensions 14um*200um 2048 pixels for use.Autoluminescence object of reference LED light belt 105,106,107 and 108 structure are as shown in figure 10, object of reference is that thickness is that 4mm, length are two (105 of 1106mm, 107) and thickness be that 4mm, length are two (106 of 622mm, 108) LED luminous zone, LED luminotron (501) is selected wavelength 850nm for use, light guide plate (502) is used to transmit light and tentatively disperses, and diffusion layer (503) makes light more even.
The control circuit block diagram as shown in Figure 9, the control circuit workflow is as follows:
1. system initialization
2.mcu (401) read the data of 4 sensors (101,102,103,104) by FPDP;
3.mcu (401) according to 4 data computation touch point position and size;
4.mcu (401) result is passed to host computer (402);
5. jump to step 2.
Wherein step 3 also can be finished by host computer, and at this moment mcu directly passes to host computer with the data of 4 sensors and gets final product, and flow process can be reduced to:
1. system initialization
2.mcu (401) read the data of 4 sensors (101,102,103,104) by FPDP
3.mcu (401) 4 groups of data are passed to host computer (402)
4. jump to step 2
Job description
This programme uses 4 sensors (101,103,103,104) as shown in Figure 6, sensor is positioned at 4 angles of touch-screen framework, and sensor established angle 45 degree have been installed 4 infrared light belts (105 of LED that 4mm is thick on touch-screen framework 4 limits, 106,107,108) as object of reference.
During touch-screen work, as shown in Figure 8, LED light belt (106,107) is imaged on the sensor (101), LED light belt (107,108) is imaged on the sensor (102), LED light belt (105,108) is imaged on the sensor (103), LED light belt (105,106) is imaged on the sensor (104), and when touching the object touch screen, data are blocked in the generation respectively that touch objects is known from experience on 4 sensors.Touch object (301) and other not interference of touch object, 4 sensors can be discerned it.Touch point (302,304) has interference and can't distinguish on sensor (101,103), can correctly distinguish on sensor (102,104), and the data of comprehensive 4 sensors can be distinguished touch point (302,304).Touch point (303,304) has interference and can't distinguish on sensor (102,104), can correctly distinguish on sensor (101,103), and the data of comprehensive 4 sensors can be distinguished touch point (303,304).The data of comprehensive 4 sensors can be discerned this 4 touch points simultaneously, and using a plurality of sensors is to discern more touch point for the phase mutual interference that reduces between the touch point.
This scheme has been used the sensor of finished product, so thickness is bigger, if the special-purpose sensor of customization can significantly reduce thickness.ILX511 length in pixels 200um, less perpendicular to the visual angle of touch panel direction, the sensor installation accuracy is had higher requirements, if increasing to length in pixels during sensor 1000um, customization can increase tolerance greatly to error.Defined a sensor module below, with sensor, optical filter, optical lens is combined, and can reduce small product size and installation difficulty greatly.
Self-defined sensor module encapsulating structure as shown in figure 11.Prism is to turn 90 degrees for incident ray is revolved, and can revolve to turn 90 degrees to encapsulate as fruit chip and just can save prism, but also not have this sealed in unit at present.The optical filter wavelength matches with the object of reference emission wavelength.Sensor pixel size 7um*1000um, sensor pixel length reaches the visual angle that 1000um can increase vertical direction, increases the tolerance for sensor alignment error and touch-screen distortion.Pixel quantity can be 512,1024,2048 etc., and whole component thickness is about 3mm.When being used for 50 cun touch-screens, border width is about 25mm, and thickness is about 5mm, if the original frame of energy and display screen merges, changes the original apparent size of display screen so hardly.
Claims (6)
1. multi-point touch panel is characterized in that it comprises: 1. line illustration image-position sensor; 2. optical filter; 3. optical lens; 4. self luminous object of reference; 5. controller, above-mentioned multi-point touch panel is a rectangular frame structure, framework enclosing region size and the display screen viewing area size cooperation that multi-point touch panel is installed, the leg of frame is equipped with 4 luminous zones that cooperate with the framework length of side as object of reference, the very thin space that is parallel to display screen that the autoluminescence object of reference surrounds is an identified region, the thickness of object of reference thickness decision identified region, at least on 3 angles of framework, sensor module is installed, sensor module is by the line illustration image-position sensor, optical lens, optical filter is formed, the visual angle that sensor is parallel on the identified region direction is that 90 degree cover whole identified region, to guarantee that perpendicular to the visual angle on the identified region direction object of reference is in the visual angle of sensor, the object that enters identified region can be caught by sensor, sensor is connected with controller, simultaneously controller has a communication port to be connected with host computer to carry out data communication, the data that in controller, comprise the control routine read sensor, in controller or host computer, comprise the data that the data processing code is used for processes sensor, go out to touch the position and the size of object according to data computation.
2. multi-point touch panel according to claim 1 is characterized in that: described line illustration image-position sensor is the linear sensor of black and white, the linear sensor of gray scale or the sensor of face battle array.
3. multi-point touch panel according to claim 1 is characterized in that: sensor installation assembly on 4 angles of framework.
4. multi-point touch panel according to claim 3 is characterized in that: in order to improve the discrimination of multiple touch points, increase sensor module in the framework optional position.
5. multi-point touch panel according to claim 1 is characterized in that: the wavelength and the optical filter of luminous object of reference match.
6. multi-point touch panel according to claim 1 is characterized in that: the wavelength of luminous object of reference is an infrared band.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100247704A CN101271372B (en) | 2008-05-06 | 2008-05-06 | Multi-point touch panel |
| PCT/CN2009/000419 WO2009135379A1 (en) | 2008-05-06 | 2009-04-20 | Multi-point touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100247704A CN101271372B (en) | 2008-05-06 | 2008-05-06 | Multi-point touch panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101271372A true CN101271372A (en) | 2008-09-24 |
| CN101271372B CN101271372B (en) | 2010-10-13 |
Family
ID=40005372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100247704A Expired - Fee Related CN101271372B (en) | 2008-05-06 | 2008-05-06 | Multi-point touch panel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101271372B (en) |
| WO (1) | WO2009135379A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009135379A1 (en) * | 2008-05-06 | 2009-11-12 | Dang Ren | Multi-point touch screen |
| WO2010108436A1 (en) * | 2009-03-27 | 2010-09-30 | 联想(北京)有限公司 | Optical touch system and method for optical touch location |
| CN102235981A (en) * | 2010-04-28 | 2011-11-09 | 宏碁股份有限公司 | Optical touch sensing system, optical touch screen system and dust detecting method |
| CN102289326A (en) * | 2011-07-07 | 2011-12-21 | 中国船舶重工集团公司第七○九研究所 | Optical multi-point touch screen device and method applicable to vibration and damp environment |
| CN101859189B (en) * | 2009-04-08 | 2012-05-09 | 联想(北京)有限公司 | Optical input system and method |
| CN102622137A (en) * | 2012-02-29 | 2012-08-01 | 广东威创视讯科技股份有限公司 | Touch screen multi-point touch control method and device for front positioning of cameras |
| CN102654808A (en) * | 2011-03-03 | 2012-09-05 | 刘中华 | Light path system for multi-point infrared touch screen and scanning detection method of light path system |
| CN102023769B (en) * | 2009-09-10 | 2012-10-31 | 江西联创电子有限公司 | Scanning device and scanning method of large-size projective-capacitance touch screen |
| CN101727245B (en) * | 2008-10-15 | 2012-11-21 | 北京京东方光电科技有限公司 | Multi-touch positioning method and multi-touch screen |
| CN103500041A (en) * | 2013-08-29 | 2014-01-08 | 广州视睿电子科技有限公司 | Port communication method for optical touch screen |
| CN115032640A (en) * | 2022-08-09 | 2022-09-09 | 荣耀终端有限公司 | Gesture recognition method and terminal equipment |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541356A (en) * | 2010-12-24 | 2012-07-04 | 敦南科技股份有限公司 | Touch point positioning method for optical touch panel and optical touch panel device |
| KR101578451B1 (en) | 2014-05-19 | 2015-12-17 | 김태민 | A touch panel using an image sensor for distance measurement and a method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6995752B2 (en) * | 2001-11-08 | 2006-02-07 | Koninklijke Philips Electronics N.V. | Multi-point touch pad |
| US20040188150A1 (en) * | 2003-03-25 | 2004-09-30 | 3M Innovative Properties Company | High transparency touch screen |
| CN101271372B (en) * | 2008-05-06 | 2010-10-13 | 党韧 | Multi-point touch panel |
-
2008
- 2008-05-06 CN CN2008100247704A patent/CN101271372B/en not_active Expired - Fee Related
-
2009
- 2009-04-20 WO PCT/CN2009/000419 patent/WO2009135379A1/en active Application Filing
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009135379A1 (en) * | 2008-05-06 | 2009-11-12 | Dang Ren | Multi-point touch screen |
| CN101727245B (en) * | 2008-10-15 | 2012-11-21 | 北京京东方光电科技有限公司 | Multi-touch positioning method and multi-touch screen |
| US9542044B2 (en) | 2008-10-15 | 2017-01-10 | Beijing Boe Optoelectronics Technology Co., Ltd. | Multi-touch positioning method and multi-touch screen |
| US8619060B2 (en) | 2008-10-15 | 2013-12-31 | Beijing Boe Optoelectronics Technology Co., Ltd. | Multi-touch positioning method and multi-touch screen |
| WO2010108436A1 (en) * | 2009-03-27 | 2010-09-30 | 联想(北京)有限公司 | Optical touch system and method for optical touch location |
| US9626043B2 (en) | 2009-03-27 | 2017-04-18 | Lenovo (Beijing) Co., Ltd. | Optical touch system and method for optical touch location |
| US20120075191A1 (en) * | 2009-03-27 | 2012-03-29 | Lenovo (Beijing) Co., Ltd. | Optical Touch System and Method for Optical Touch Location |
| CN101859189B (en) * | 2009-04-08 | 2012-05-09 | 联想(北京)有限公司 | Optical input system and method |
| CN102023769B (en) * | 2009-09-10 | 2012-10-31 | 江西联创电子有限公司 | Scanning device and scanning method of large-size projective-capacitance touch screen |
| CN102235981A (en) * | 2010-04-28 | 2011-11-09 | 宏碁股份有限公司 | Optical touch sensing system, optical touch screen system and dust detecting method |
| WO2012116576A1 (en) * | 2011-03-03 | 2012-09-07 | 北京博汇信通科技有限公司 | Optical path system for infrared multi-touch screen and process for receiving and sending infrared signals thereof |
| CN102654808A (en) * | 2011-03-03 | 2012-09-05 | 刘中华 | Light path system for multi-point infrared touch screen and scanning detection method of light path system |
| CN102289326B (en) * | 2011-07-07 | 2014-05-14 | 中国船舶重工集团公司第七0九研究所 | Optical multi-point touch screen device and method applicable to vibration and damp environment |
| CN102289326A (en) * | 2011-07-07 | 2011-12-21 | 中国船舶重工集团公司第七○九研究所 | Optical multi-point touch screen device and method applicable to vibration and damp environment |
| CN102622137B (en) * | 2012-02-29 | 2014-12-03 | 广东威创视讯科技股份有限公司 | Touch screen multi-point touch control method and device for front positioning of cameras |
| CN102622137A (en) * | 2012-02-29 | 2012-08-01 | 广东威创视讯科技股份有限公司 | Touch screen multi-point touch control method and device for front positioning of cameras |
| CN103500041A (en) * | 2013-08-29 | 2014-01-08 | 广州视睿电子科技有限公司 | Port communication method for optical touch screen |
| CN103500041B (en) * | 2013-08-29 | 2016-05-25 | 广州视睿电子科技有限公司 | A kind of port communication method of optical touch screen |
| CN115032640A (en) * | 2022-08-09 | 2022-09-09 | 荣耀终端有限公司 | Gesture recognition method and terminal equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009135379A1 (en) | 2009-11-12 |
| CN101271372B (en) | 2010-10-13 |
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