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Optical contact control structure

A technology of optical touch and touch range, applied in the direction of instruments, electrical digital data processing, input/output process of data processing, etc., can solve the problems of heavy structure weight, high cost, etc.

Active Publication Date: 2014-07-02
QUANTA COMPUTER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, such a touch structure 100 requires too many light source groups 102 and image sensors 103, which will cause excessive cost, excessive structural weight and excessive energy consumption.

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0049] Please refer to Figure 2A , which is a top view of the optical touch structure 200 according to the first embodiment of the present invention. The optical touch structure 200 of this embodiment includes a light guide element 202 , a light source 205 , a mirror 206 , and an image sensor 203 . The light guide element 202 has a light emitting surface 202a, and the light source 205 is disposed adjacent to the light guide element 202 . The light guide element 202 guides the light generated by the light source 205 to exit from the light exit surface 202a. The reflecting mirror 206 is disposed on one side of the light guide element 202 , and the extending direction of the reflecting mirror 206 is substantially perpendicular to the light emitting surface 202 a. The intersection of the light guide element 202 and the reflector 206 is defined as a first position 207 , and the light guide element 202 and the reflector 206 define a touch range 201 . The image sensor 203 is disp...

no. 2 example

[0059] Please refer to Figure 3A , which is a top view of the optical touch structure 300 according to the second embodiment of the present invention. Compared with the first embodiment, the light guide element can further make most of the light at each light exit point be the first direction light D1 or the second direction light D2, and the light quantity of the first direction light D1 and the second direction light D2 Can be pre-designed. In this way, the light intensity of light rays from different directions can be controlled more precisely.

[0060] Please refer to Figure 3B , which is a schematic diagram illustrating an example of the light guide element 302 according to the second embodiment of the present invention. The light guiding element 302 includes a guiding layer 302c, a collimating layer 302d and a light splitting layer 302e. The guiding layer 302c is used to guide the light generated by the light source 305 so that the light can be evenly guided to the...

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PUM

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Abstract

The invention discloses an optical touch structure, which includes a light guide element, a light source, a reflector, and an image sensor. The light guide element has a light exit surface. The light source is arranged adjacent to the light guide element. The light guide element guides the light generated by the light source to emit from the light exit surface. The reflecting mirror is arranged on one side of the light guide element, and the extending direction of the reflecting mirror is substantially perpendicular to the light emitting surface. The intersection of the light guide element and the reflector is defined as the first position, and the light guide element and the reflector define the touch range. The image sensor is disposed at a second position relative to the first position, and the sensing range of the image sensor at least covers the touch range. When the traveling path of the light in the first direction toward the image sensor is smaller than the traveling path of the light in the second direction toward the image sensor through the reflector, the light intensity of the light in the second direction is greater than that of the light in the first direction.

Description

technical field [0001] The present invention relates to a touch control structure, and in particular to an optical touch control structure. Background technique [0002] Please refer to figure 1 , which shows a top view of the conventional optical touch structure 100 . The conventional optical touch structure 100 includes three light source groups 102 and two image sensors 103 . The light source groups 102 are used to generate a uniform light source, and the three light source groups 102 form a touch area 101 . Each of the two image sensors 103 is disposed adjacent to only one light source group 102 to sense the touch area 101 respectively. When the touch is in progress, a touch point 104 appears in the touch area 101 , and the image sensor 103 senses the touch point 104 as a dark spot. The angle θ sensed by the two image sensors 103 respectively 1 , θ 2 and the length L and width H of the touch area 101 , and then calculate the position (x, y) of the touch point 104 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
Inventor 林建宏
Owner QUANTA COMPUTER INC