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Light source and mounting method thereof, touch screen, touch system and display

A touch screen and light source technology, which is applied in the fields of touch systems and displays, light sources and their installation, and touch screens, can solve the problems of reducing the accuracy of touch screen detection of touched objects, uneven brightness of image data, etc., and achieves the effect of good brightness uniformity and improved accuracy.

Active Publication Date: 2014-09-03
北京科加触控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventor found in the process of studying the present invention that as the incident angle and distance of the light emitted by the infrared light sources 12 and 13 to the retro-reflective strip 11 increase, the reflection efficiency of the retro-reflective strip 11 decreases, and the retro-reflective strip 11 11 The light reflected back to the infrared cameras 9 and 10 will decrease, resulting in uneven brightness of the image data collected by the infrared cameras 9 and 10. The brightness of the image block formed by the light reflected by the low area is small, and the brightness of the image block formed by the light reflected by the area with higher reflection efficiency on the regression emission strip 11 is larger. When the data detects the touch object, if the image of the touch object is located in the image data on the image block formed by the light reflected by the area with low reflection efficiency on the retro-reflective strip 11, the touch screen will not be able to recognize the touch object, thereby reducing the touch screen detection. The accuracy of the object, wherein, the incident angle refers to the angle between the light emitted by the infrared light source 12 to the retroreflective strip 11 and the normal line of the surface of the retroreflective strip 11

Method used

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  • Light source and mounting method thereof, touch screen, touch system and display
  • Light source and mounting method thereof, touch screen, touch system and display
  • Light source and mounting method thereof, touch screen, touch system and display

Examples

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no. 1 example

[0027] Such as figure 2 As shown, it is a schematic structural diagram of the touch screen in the first embodiment of the light source of the present invention, which may include two light sources 211 and 212, a retro-reflective strip 11, two imaging devices 231 and 232, and a processing unit 15.

[0028] Two light sources 211 and 212 are installed around the touch detection area 16 of the touch screen. The retro-reflective strip 11 is installed around the touch detection area 16. The two imaging devices 231 and 232 are respectively installed at positions adjacent to the two light sources 211 and 212. Specifically, the imaging devices may be located above, below, or on one side of the light source, and each imaging device has at least one light source nearby. The processing unit 15 is connected with two imaging devices 231 and 232 and two light sources 211 and 212. The light emitted by each of the two light sources 211 and 212 covers the touch detection area 16, and the retrore...

no. 2 example

[0033] Such as image 3 Shown is a schematic diagram of the structure of the touch screen in the second embodiment of the light source of the present invention, and figure 2 The difference between the schematic structural diagrams shown is that this embodiment may also include a touch screen frame, which includes a first edge 201, a second edge 202, a third edge 203, and a fourth edge 204; in this embodiment, two The imaging device includes a first imaging device 231 and a second imaging device 232, wherein the first imaging device 231 is installed at the intersection of the first edge 201 and the second edge 202, and the second imaging device 232 is installed at the first edge 201 and the second edge 201. At the intersection of the four edges 204; the retro-reflective strip 11 is installed on the second edge 202, the third edge 203, and the fourth edge 204; in this embodiment, the two light sources include the first light source 211 and the second light source 212, the first T...

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Abstract

Light sources (211,212), a mounting method thereof, a touch screen, a touch system and a display are provided. Wherein, the light sources (211,212) are applied to the touch screen which at least includes two imaging devices (231,232), two above light sources (211,212), a retro-reflection strip (11) and a processing unit (15). For each of the light sources (211,212), the retro-reflection strip (11) includes first regions (A, C) and second regions (B, D), and the intensity of light which the light sources emit to the first regions(A, C) is larger than the intensity of light which the light sources emit to the second regions(B, D), wherein, the first regions (A, C) include the regions with the lowest reflection efficiency in the retro-reflection strip (11). The brightness evenness of the image data collected by the imaging devices (231,232) can be improved, so as to improve the touch object detection precision of the touch screen.

Description

Technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a light source and an installation method thereof, a touch screen, a touch system and a display. Background technique [0002] With the popularization of computer technology, a new human-computer interaction technology-touch screen technology appeared in the early 1990s. With this technology, the user can operate the computer by simply touching the graphics or text on the computer display screen with his hand, thereby getting rid of the shackles of the keyboard and mouse, which greatly facilitates the user. [0003] A touch screen with a camera is a touch screen that collects image data of a touch object through a camera, and then transmits the image data to a processing unit for processing, thereby detecting the position information of the touch object. Among them, the accuracy of the detected position information of the touch object is closely related to the quality of the im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
CPCG06F3/0428
Inventor 吴振宇叶新林刘建军刘新斌
Owner 北京科加触控技术有限公司