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An optical sensing device and a method for adjusting the same

A technology of light sensing and light sensing modules, applied to devices with multiple detectors, methods of comparing with reference electrical parameters, measurement circuits, etc., can solve sensing result errors, sensing characteristic changes, and drift and other problems to achieve the effect of solving errors

Active Publication Date: 2014-12-31
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the light-sensing element is used for a long time, the gate-source voltage difference of the light-sensing element will drift, which will cause the sensing characteristics of the light-sensing element to change, which may cause errors in the sensing results

Method used

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  • An optical sensing device and a method for adjusting the same
  • An optical sensing device and a method for adjusting the same
  • An optical sensing device and a method for adjusting the same

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Embodiment Construction

[0047] Please refer to figure 1 , figure 1 It is a circuit block diagram of an embodiment of the present invention. Such as figure 1 As shown, the light sensing device 100 of the embodiment of the present invention includes a light sensing module 10 and a control module 50 , and the light sensing module 10 is electrically coupled to the control module 50 .

[0048] The light sensing module 10 can output the first sensing signal S_1 and the second sensing signal Ref according to the received light intensity, and provide a light-sensitive touch operation function. For example, when the light sensing module 10 is irradiated by a light pen (not shown in the figure), it outputs the first sensing signal S_1 and the second sensing signal Ref with a high level to correspond to the state of being touched. . When the light sensing module 10 is not illuminated by a light pen (not shown in the figure), it outputs the first sensing signal S_1 and the second sensing signal Ref with a lo...

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Abstract

A light sensing apparatus includes a light sensing module, a signal conversion module and a processing module. The light sensing module is configured to output a first and second sense signals according to a light intensity emitting thereon. The signal conversion module is electrically coupled to the light sensing module and configured to receive the first and second sense signals and output a sense value according to a relative difference between the first and second sense signals, The comparison module is electrically coupled to the signal conversion module and configured to adjust a light sensing characteristic of the light sensing module according to the sense value so as to adjust a light sensing characteristic of the light sensing module. An adjustment method for a light sensing apparatus is also provided.

Description

technical field [0001] The present invention relates to a sensing device and its adjustment method, in particular to a light sensing device and its adjustment method. Background technique [0002] At present, touch panel technology generally has the following types: resistive, capacitive, optical, electromagnetic, ultrasonic, and embedded LCD (LCD In-Cell, which can be divided into three types: resistive, capacitive, and optical. kind). In the display of the embedded light-sensing touch panel, the difference in leakage current caused by different light intensities is used as the condition for whether the light-sensing element in the embedded light-sensing touch panel is turned on, and then the embedded light-sensing touch panel is judged. Whether the light-sensitive touch panel is touched. [0003] For example, the photo-sensing element includes thin film transistors and the like. The thin film transistor leakage current of the light sensing element under finger touch, am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
CPCG01J1/46G01J1/4228G06F3/0421G01J1/18G06F3/0416G06F3/0412G06F3/0418G06F3/042
Inventor 洪春龙杨昌弘杨竣崴柯见铭
Owner AU OPTRONICS CORP