Optical touch control device
An optical touch and light technology, which is applied to the input/output process of instruments, electrical digital data processing, and data processing, etc., can solve the problems of increased cost of optical touch devices, complex driving circuits, etc., so as to solve the problem of blind spots and simplify Drive circuit, cost reduction effect
Inactive Publication Date: 2013-01-02
PIXART IMAGING INC
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[0005] However, in order to enable the light emitting elements 122b and 122c to provide illumination light with normal brightness or compensation light with relatively low brightness depending on the situation, it is necessary to design a complex driving circuit, which leads to an increase in the cost of the optical touch device 100
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[0034] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the optical touch device proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , detailed as follows:
[0035] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings. Through the description of specific implementation methods, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the attached drawings are only for reference and description, and are not used to explain the present invention limit.
[0036] figure 2 It is a top structural schemat...
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The invention relates to an optical touch control device. The optical touch control device has a sensing area and comprises a plurality of light guiding elements, a light source module, a light sensing element and an auxiliary light guiding element, wherein each of the light guiding elements is provided with a first out-light surface facing the sensing area and comprises a first light guiding element and a second light guiding element; the optical sensing element and the auxiliary light guiding element are arranged between two adjacent ends of the first light guiding element and the second light guiding element; the light sensing element comprises an optical sensing end facing the sensing area; the auxiliary light guiding element is positioned between the light sensing element and the sensing area and is provided with a first in-light surface facing the first light guiding element, a second in-light surface facing the second light guiding element and a second out-light surface facing the sensing area; and the second out-light surface is connected between the first in-light surface and the second in-light surface. By the optical touch control device, a problem of a blind area can be avoided.
Description
technical field [0001] The present invention relates to a touch device, and in particular to an optical touch device. Background technique [0002] The optical touch device is one of the commonly used electronic components required to realize the touch function. figure 1 It is a structural schematic diagram of an existing optical touch device with three image sensing elements. Please refer to figure 1 , the existing optical touch device 100 includes reflective strips 112 a , 112 b , 112 c , and 112 d sequentially arranged along four sides of a rectangular track. The optical touch device 100 further includes light emitting elements 122a, 122b, 122c for providing light to the reflective strips 112a, 112b, 112c, 112d, wherein the light emitting element 122a is disposed between adjacent ends of the reflective strip 112a and the reflective strip 112b The light-emitting element 122b is disposed between adjacent ends of the reflective strip 112b and the reflective strip 112c, an...
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IPC IPC(8): G06F3/042
Inventor 赖鸿庆林俊生
Owner PIXART IMAGING INC