CN110543261B - Method for judging real touch or suspension of infrared touch screen - Google Patents
Method for judging real touch or suspension of infrared touch screen Download PDFInfo
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- CN110543261B CN110543261B CN201810526617.5A CN201810526617A CN110543261B CN 110543261 B CN110543261 B CN 110543261B CN 201810526617 A CN201810526617 A CN 201810526617A CN 110543261 B CN110543261 B CN 110543261B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000725 suspension Substances 0.000 title claims abstract description 23
- 230000001678 irradiating effect Effects 0.000 claims 5
- 230000000903 blocking effect Effects 0.000 abstract description 10
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
Classifications
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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
- G06F3/03—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
Abstract
The invention discloses a method for judging real touch or suspension of an infrared touch screen, which comprises the following steps: a1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image; and A2, judging that a touch object touches the touch screen once the infrared light source image is not received. According to the method, the method is changed into a judging method for judging that the touch object touches the touch screen only by taking the blocking of infrared light reception as the judgment, the distance between the touch object and the touch screen is calculated according to the infrared light source image received by the infrared camera and the reflected light image of the touch screen, and then whether the touch object actually touches the touch screen is judged in a refined mode, so that the possibility of misjudgment is reduced, the sensitivity of the infrared touch screen is improved, and the user friendliness is enhanced.
Description
Technical Field
The invention relates to the technical field of infrared touch screens, in particular to a method for judging real touch or suspension of an infrared touch screen.
Background
The infrared touch screen is composed of infrared transmitting and receiving elements arranged on an outer frame of the touch screen, an infrared detection net is formed on the surface of the screen, when a touch object shields infrared light, the infrared receiving elements can not receive the infrared light, and at the moment, the coordinate position of the touch object is calculated and operation response is realized. In the infrared touch screen in the prior art, as long as the infrared light is detected to be blocked by scanning, it is determined that a touch object touches the touch screen, but sometimes the touch object (such as a mouse) does not touch the touch screen, but is suspended above the touch screen, the infrared light is still blocked, and at the moment, if the touch is judged, erroneous judgment is possibly caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for judging the real touch or suspension of an infrared touch screen aiming at the defects of the prior art, and overcomes the defect that the real touch and suspension state cannot be distinguished when the touch screen is judged to be touched in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for judging real touch or suspension of an infrared touch screen comprises the following steps:
a1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
and A2, judging that a touch object touches the touch screen once the infrared light source image is not received.
A method for judging real touch or suspension of an infrared touch screen comprises the following steps:
b1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
and B2, judging that a touch object touches the touch screen once the infrared light source image is not received and only part of the reflected light image of the touch screen is received.
A method for judging real touch or suspension of an infrared touch screen comprises the following steps:
the method comprises the steps that C1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
and C2, judging that the touch object floats above the touch screen once the infrared light source image is not received and the complete touch screen reflected light image is received.
A method for judging real touch or suspension of an infrared touch screen comprises the following steps:
the method comprises the steps that D1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
and D2, once only partial infrared light source images are received and the complete touch screen reflected light images are received, judging that a touch object floats above the touch screen.
A method for judging real touch or suspension of an infrared touch screen comprises the following steps:
e1, receiving and identifying an infrared light source image and a touch screen reflected light image by an infrared camera;
e2, calculating the distance between the touch object and the touch screen according to the received infrared light source image and the touch screen reflected light image;
and E3, setting a distance threshold, judging that the touch object touches the touch screen once the distance between the touch object and the touch screen is smaller than the distance threshold, otherwise judging that the touch object floats above the touch screen.
According to an embodiment of the invention, the method comprises the steps of: the method comprises the steps that a plurality of infrared cameras receive and identify infrared light source images and touch screen reflected light images, the distance between a touch object and a touch screen is calculated according to the infrared light source images and the touch screen reflected light images received by each infrared camera, and the average value of all the distances is taken; and setting a distance threshold, judging that a touch object touches the touch screen once the average value is smaller than the distance threshold, and otherwise judging that the touch object floats above the touch screen.
The implementation of the technical scheme of the invention has the following beneficial effects: according to the method, the method is changed into a judging method for judging that the touch object touches the touch screen only by taking the blocking of infrared light reception as the judgment, the distance between the touch object and the touch screen is calculated according to the infrared light source image received by the infrared camera and the reflected light image of the touch screen, and then whether the touch object actually touches the touch screen is judged in a refined mode, so that the possibility of misjudgment is reduced, the sensitivity of the infrared touch screen is improved, and the user friendliness is enhanced.
Drawings
The advantages and the manner of carrying out the invention will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which the content shown is meant to illustrate, but not to limit, the invention in any sense, and wherein:
FIG. 1 is a schematic diagram of an infrared touchscreen obstruction imaging of the present invention;
FIG. 2 is a schematic diagram of the geometrical relationship of calculating the distance of an obstruction from an infrared touch screen according to the present invention;
FIG. 3 is a schematic diagram of an infrared transmitting tube and camera arrangement according to an embodiment of the present invention;
FIG. 4 is a schematic view of an infrared light source image and a touch screen reflected light image according to the present invention;
FIG. 5 is a flow chart of the process of the present invention;
FIG. 6 is a schematic diagram of the present invention for calculating the distance of an obstruction from an infrared touch screen.
Detailed Description
As shown in FIG. 5, the method for judging the real touch or suspension of the infrared touch screen comprises the following steps:
a1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
and A2, judging that a touch object touches the touch screen once the infrared light source image is not received.
The invention further discloses a method for judging the real touch or suspension of the infrared touch screen, which comprises the following steps:
b1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
and B2, judging that a touch object touches the touch screen once the infrared light source image is not received and only part of the reflected light image of the touch screen is received.
The invention further discloses a method for judging the real touch or suspension of the infrared touch screen, which comprises the following steps:
the method comprises the steps that C1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
and C2, judging that the touch object floats above the touch screen once the infrared light source image is not received and the complete touch screen reflected light image is received.
A method for judging real touch or suspension of an infrared touch screen comprises the following steps:
the method comprises the steps that D1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
and D2, once only partial infrared light source images are received and the complete touch screen reflected light images are received, judging that a touch object floats above the touch screen.
The invention further discloses a method for judging the real touch or suspension of the infrared touch screen, which comprises the following steps:
e1, receiving and identifying an infrared light source image and a touch screen reflected light image by an infrared camera;
e2, calculating the distance between the touch object and the touch screen according to the received infrared light source image and the touch screen reflected light image;
and E3, setting a distance threshold, judging that the touch object touches the touch screen once the distance between the touch object and the touch screen is smaller than the distance threshold, otherwise judging that the touch object floats above the touch screen.
The method is characterized in that a plurality of infrared cameras receive and identify infrared light source images and touch screen reflected light images, the distance between a touch object and a touch screen is calculated according to the infrared light source images and the touch screen reflected light images received by each infrared camera, and the average value of all the distances is taken; and setting a distance threshold, judging that a touch object touches the touch screen once the average value is smaller than the distance threshold, and otherwise judging that the touch object floats above the touch screen.
As shown in fig. 1, the light source may be a point light source or a line light source; a touch screen is arranged below the light source; the light source emits light and is captured by the camera; the imaging light source is divided into two parts, wherein one part is an infrared emission tube direct light source, and the other part is a reflection light source reflected by the touch screen; the infrared emission tube directs the light source to have a certain distance from the reflecting surface of the touch screen, so that the camera can distinguish the image of the light source from the reflected image; when the shielding object is close to the reflecting surface of the touch screen, the distance between the shielding object and the camera or the distance between the shielding object and the light source can be estimated by calculating the brightness of the image of the light source and the brightness of the reflected image.
As shown in fig. 2, as the height of the shade gradually decreases,
a. when the shielding object is positioned on the right side of the regional boundary, the image of the light source is shielded firstly, and the reflected image is shielded later;
b. when the shielding object is positioned at the left side of the regional boundary, the image of the light source is shielded first, and the reflected image is synchronously shielded partially.
At this time:
1) The image of the light source and the reflected image are not shielded, and the shielding object is far away from the reflecting surface of the touch screen; 2) When the image of the light source is completely or partially blocked and the reflected image is not completely blocked, the blocking object is closer to the reflecting surface of the touch screen;
3) The image of the light source is completely blocked, and then the blocking object is close to the reflecting surface of the touch screen.
In the process that the shielding object is gradually close to the reflecting surface:
1. if the image of the light source is shielded firstly, and the reflected image is shielded later, the distance between the shielding object and the camera is indicated to be at the right side of the regional boundary;
2. if the image of the light source and the reflected image are simultaneously shielded, indicating that the shielding object is at the left side of the regional boundary;
3. when the image of the light source is completely blocked, the distance between the blocking object and the light source is judged by calculating the intensity (shape or brightness) of the reflected image, and when the blocking object is close to the dividing line, the intensity of the reflected image is stronger and when the blocking object is close to the light source, the intensity of the reflected image is weaker.
Calculation method
The height of the obstruction can be calculated by image processing to obtain the intensity a of the light source, the intensity b of the light source, and the distance from the point E to the reflecting surface, AB/bc=ad/EC, ab+bc=ac.
Assuming that the ratio of the intensity of the reflected image to the maximum intensity of the reflected image is x% when the image of the light source is completely blocked, the distance of the light source from the blocking object when the blocking object is on the left side of the dividing line can be expressed as: AB times x%. At the same time, the height of the shielding object at the moment can be calculated and estimated.
As shown in fig. 3, the light sources are infrared light emitting tubes, the light sources are distributed on four sides of a rectangle in the lower diagram, the cameras are also arranged on four sides of the rectangle, signals of a plurality of infrared light emitting tubes are collected, the lower diagram is only a schematic diagram, the position of each camera can be used for placing the edge of a rectangular touch plane according to the situation, the edge of each rectangular touch plane is composed of the cameras and infrared light emitting points distributed at equal intervals, the light emitting points can be realized by using infrared emitting tubes or can be realized by using light splitting strips with light splitting capacity, the number of the rectangular cameras and the light emitting points can be selected according to the requirements of performance, if the requirements on the touch effect are not high, 4 cameras can be arranged at four vertexes, the distance between the light emitting points is larger (9 mm is an example), if certain requirements on the touch effect are met, and the cameras can be built at the upper and lower bottom edges (total 6 or 8) and the distance between the light emitting points is smaller (5-6 mm is an example). In the following, the placement of cameras in the center lines of the four corners and the upper and lower bottom edges will be described as an example. Cameras 1, 2, 3, 4 are placed at the touch area vertices, camera 5 is placed at the upper midpoint, and camera 6 is placed at the lower midpoint.
Acquiring data
And the cameras are used for shooting at intervals of a certain time (for example, 5 milliseconds) simultaneously or in a certain sequence to acquire frame luminous images.
The camera 1 is responsible for collecting the top and right data of the touch area.
The camera 2 is responsible for collecting the bottom and right data of the touch area.
The camera 3 is responsible for collecting the bottom and left data of the touch area.
The camera 4 is responsible for collecting the top and left data of the touch area.
The camera 5 is responsible for collecting touch area bottom edge data.
The camera 6 is responsible for collecting touch area top edge data.
As shown in FIG. 4, the brightness information of all the infrared luminous tubes at the bottom edge of the rectangle is collected, wherein the brightness information comprises two parts of direct light and reflection, the upper part is a light source image, the lower part is an image of the light source reflected by the touch surface, each vertical line represents one luminous tube, the linear light source is one line, and the point-shaped light source is one point.
Brightness reference value: when there is no object near the touch surface, each luminous point, and the brightness of the image reflected by the luminous point, the luminous point is numbered i, and the brightness is denoted as B i Brightness B of image i ’。
Brightness current value: when there is an object near the touch surface, each luminous point, and the brightness of the image reflected by the luminous point, the luminous point is numbered i, and the brightness is denoted as L i Brightness L of image i ’。
Shielding line: when L i /B i Or L i ’/B i ' below a certain proportion (0.8 for example), a shade is considered to be present. Then it can be presumed that the occlusion object is on the line connecting the cameras and the i-number luminous point, this line is called occlusion line, and a plurality of occlusion lines can be obtained by performing the same processing on each camera.
As shown in fig. 6, taking an example in which there are two touch points A, B, a black straight line from the camera position to the corresponding side is a blocking line.
1. The different occlusion lines intersect to obtain the possible positions (straight line intersection) of the touch points.
2. And eliminating non-touch points according to the number of straight lines passing through the intersection points of the straight lines, the distance estimation of the distance between the straight lines and the camera and the historical track. The distance estimating method is the method for estimating the distance of the shielding object, and the historical track is the historical record of the touch point coordinates calculated on the screen. For example, if the number of straight lines passing through the intersection points is small, the intersection point position and the estimated difference are excessively large, and if the number of straight lines does not match the historical track, the number of straight lines is appropriately large.
3. The coordinates of the touch point A, B are calculated.
4. Taking the point A as an example, six shielding lines pass through the point A, and the height h of A on each shielding line is estimated by using the method for estimating the height of the shielding object 1 h 2 ..h 6 Calculate h 1
h 2 …h 6 As the height h of the shade, according to the actual use of the device,
a value H is selected, when H < H is, the point a is reported as a touch point, when H > =h,
and reporting the point A to be in suspension.
Output of
The touch information is reported to the operating system by using a USB HID protocol or a custom protocol in a connection mode such as USB or serial port, and the software in the operating system cooperates with display effects such as track of points, suspension state and the like.
Those skilled in the art can implement the present invention in many modifications without departing from the spirit and scope of the present invention, and the present invention is not limited to the preferred embodiments of the present invention, but includes all equivalent structural modifications which are made in the present invention by the description and the accompanying drawings.
Claims (5)
1. The method for judging the real touch or suspension of the infrared touch screen is characterized by comprising the following steps of:
a1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
a2, judging that a touch object touches the touch screen once the infrared light source image is not received;
the infrared light source image is an image formed by directly irradiating light rays emitted by the infrared light source on the infrared camera, and the touch screen reflected light image is an image formed by reflecting the light rays emitted by the infrared light source on the infrared camera through the touch screen;
the infrared light source is located at a distance from the touch screen reflecting surface, so that the infrared camera can distinguish an infrared light source image from a touch screen reflecting light image, and when a shielding object is close to the touch screen reflecting surface, the brightness of the infrared light source image and the brightness of the touch screen reflecting light image are calculated, so that the distance between the shielding object and the touch screen reflecting surface, the distance between the shielding object and the infrared camera or the distance between the shielding object and the infrared light source are calculated;
the infrared cameras receive and identify infrared light source images and touch screen reflected light images, the distance between a touch object and the touch screen is calculated according to the infrared light source images and the touch screen reflected light images received by each infrared camera, and the average value of all the distances is taken; and setting a distance threshold, judging that a touch object touches the touch screen once the average value is smaller than the distance threshold, and otherwise judging that the touch object floats above the touch screen.
2. The method for judging the real touch or suspension of the infrared touch screen is characterized by comprising the following steps of:
b1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
b2, judging that a touch object touches the touch screen once the infrared light source image is not received and only partial touch screen reflected light image is received;
the infrared light source image is an image formed by directly irradiating light rays emitted by the infrared light source on the infrared camera, and the touch screen reflected light image is an image formed by reflecting the light rays emitted by the infrared light source on the infrared camera through the touch screen;
the infrared light source is located at a distance from the touch screen reflecting surface, so that the infrared camera can distinguish an infrared light source image from a touch screen reflecting light image, and when a shielding object is close to the touch screen reflecting surface, the brightness of the infrared light source image and the brightness of the touch screen reflecting light image are calculated, so that the distance between the shielding object and the touch screen reflecting surface, the distance between the shielding object and the infrared camera or the distance between the shielding object and the infrared light source are calculated;
the infrared cameras receive and identify infrared light source images and touch screen reflected light images, the distance between a touch object and the touch screen is calculated according to the infrared light source images and the touch screen reflected light images received by each infrared camera, and the average value of all the distances is taken; and setting a distance threshold, judging that a touch object touches the touch screen once the average value is smaller than the distance threshold, and otherwise judging that the touch object floats above the touch screen.
3. The method for judging the real touch or suspension of the infrared touch screen is characterized by comprising the following steps of:
the method comprises the steps that C1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
c2, judging that a touch object floats above the touch screen once the infrared light source image is not received and the complete touch screen reflected light image is received;
the infrared light source image is an image formed by directly irradiating light rays emitted by the infrared light source on the infrared camera, and the touch screen reflected light image is an image formed by reflecting the light rays emitted by the infrared light source on the infrared camera through the touch screen;
the infrared light source is located at a distance from the touch screen reflecting surface, so that the infrared camera can distinguish an infrared light source image from a touch screen reflecting light image, and when a shielding object is close to the touch screen reflecting surface, the brightness of the infrared light source image and the brightness of the touch screen reflecting light image are calculated, so that the distance between the shielding object and the touch screen reflecting surface, the distance between the shielding object and the infrared camera or the distance between the shielding object and the infrared light source are calculated;
the infrared cameras receive and identify infrared light source images and touch screen reflected light images, the distance between a touch object and the touch screen is calculated according to the infrared light source images and the touch screen reflected light images received by each infrared camera, and the average value of all the distances is taken; and setting a distance threshold, judging that a touch object touches the touch screen once the average value is smaller than the distance threshold, and otherwise judging that the touch object floats above the touch screen.
4. The method for judging the real touch or suspension of the infrared touch screen is characterized by comprising the following steps of:
the method comprises the steps that D1, an infrared camera receives and identifies an infrared light source image and a touch screen reflected light image;
d2, once only partial infrared light source images are received and the complete touch screen reflected light images are received, judging that a touch object floats above the touch screen;
the infrared light source image is an image formed by directly irradiating light rays emitted by the infrared light source on the infrared camera, and the touch screen reflected light image is an image formed by reflecting the light rays emitted by the infrared light source on the infrared camera through the touch screen;
the infrared light source is located at a distance from the touch screen reflecting surface, so that the infrared camera can distinguish an infrared light source image from a touch screen reflecting light image, and when a shielding object is close to the touch screen reflecting surface, the brightness of the infrared light source image and the brightness of the touch screen reflecting light image are calculated, so that the distance between the shielding object and the touch screen reflecting surface, the distance between the shielding object and the infrared camera or the distance between the shielding object and the infrared light source are calculated;
the infrared cameras receive and identify infrared light source images and touch screen reflected light images, the distance between a touch object and the touch screen is calculated according to the infrared light source images and the touch screen reflected light images received by each infrared camera, and the average value of all the distances is taken; and setting a distance threshold, judging that a touch object touches the touch screen once the average value is smaller than the distance threshold, and otherwise judging that the touch object floats above the touch screen.
5. The method for judging the real touch or suspension of the infrared touch screen is characterized by comprising the following steps of:
e1, receiving and identifying an infrared light source image and a touch screen reflected light image by an infrared camera;
e2, calculating the distance between the touch object and the touch screen according to the received infrared light source image and the touch screen reflected light image;
e3, setting a distance threshold, judging that the touch object touches the touch screen once the distance between the touch object and the touch screen is smaller than the distance threshold, otherwise judging that the touch object floats above the touch screen;
the infrared light source image is an image formed by directly irradiating light rays emitted by the infrared light source on the infrared camera, and the touch screen reflected light image is an image formed by reflecting the light rays emitted by the infrared light source on the infrared camera through the touch screen;
the infrared light source is located at a distance from the touch screen reflecting surface, so that the infrared camera can distinguish an infrared light source image from a touch screen reflecting light image, and when a shielding object is close to the touch screen reflecting surface, the brightness of the infrared light source image and the brightness of the touch screen reflecting light image are calculated, so that the distance between the shielding object and the touch screen reflecting surface, the distance between the shielding object and the infrared camera or the distance between the shielding object and the infrared light source are calculated;
the infrared cameras receive and identify infrared light source images and touch screen reflected light images, the distance between a touch object and the touch screen is calculated according to the infrared light source images and the touch screen reflected light images received by each infrared camera, and the average value of all the distances is taken; and setting a distance threshold, judging that a touch object touches the touch screen once the average value is smaller than the distance threshold, and otherwise judging that the touch object floats above the touch screen.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101802760A (en) * | 2007-08-30 | 2010-08-11 | 奈克斯特控股公司 | Optical touchscreen with improved illumination |
| CN201583925U (en) * | 2010-01-13 | 2010-09-15 | 北京汇冠新技术股份有限公司 | Touch screen |
| CN103019475A (en) * | 2012-12-11 | 2013-04-03 | 武汉智慧城市研究院股份有限公司 | Novel man-machine interaction system |
| CN103558949A (en) * | 2013-11-08 | 2014-02-05 | 创维光电科技(深圳)有限公司 | Infrared touch screen, method and system for suspension touch control |
| CN104407747A (en) * | 2014-12-04 | 2015-03-11 | 京东方科技集团股份有限公司 | Infrared touch screen, touch sensing method and display device |
| CN104699327A (en) * | 2013-12-05 | 2015-06-10 | 原相科技股份有限公司 | Optical touch system and suspension judgment method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8339379B2 (en) * | 2004-04-29 | 2012-12-25 | Neonode Inc. | Light-based touch screen |
| US8456447B2 (en) * | 2003-02-14 | 2013-06-04 | Next Holdings Limited | Touch screen signal processing |
-
2018
- 2018-05-28 CN CN201810526617.5A patent/CN110543261B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101802760A (en) * | 2007-08-30 | 2010-08-11 | 奈克斯特控股公司 | Optical touchscreen with improved illumination |
| CN201583925U (en) * | 2010-01-13 | 2010-09-15 | 北京汇冠新技术股份有限公司 | Touch screen |
| CN103019475A (en) * | 2012-12-11 | 2013-04-03 | 武汉智慧城市研究院股份有限公司 | Novel man-machine interaction system |
| CN103558949A (en) * | 2013-11-08 | 2014-02-05 | 创维光电科技(深圳)有限公司 | Infrared touch screen, method and system for suspension touch control |
| CN104699327A (en) * | 2013-12-05 | 2015-06-10 | 原相科技股份有限公司 | Optical touch system and suspension judgment method thereof |
| CN104407747A (en) * | 2014-12-04 | 2015-03-11 | 京东方科技集团股份有限公司 | Infrared touch screen, touch sensing method and display device |
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