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Optical touch device and method as well as touch display device and method

A technology of touch display and touch device, applied in the fields of touch display device and optical touch device, can solve the problems of inaccurate touch detection of optical touch screen, etc., and achieve the effect of simple structure and low cost

Active Publication Date: 2012-08-29
XIAN YISHEN OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0014] The problem solved by the present invention is that the optical touch screen in the prior art cannot accurately perform touch detection under strong interference light, so the present invention provides an optical touch device and method, a touch display device and method that are not affected by interference light

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  • Optical touch device and method as well as touch display device and method
  • Optical touch device and method as well as touch display device and method
  • Optical touch device and method as well as touch display device and method

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Embodiment Construction

[0071] In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0072] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0073] As mentioned in the background section, in the prior art, when there is strong interference light, it will affect the accuracy of the optical touch screen in detecting the touch position, and even make the optical touch screen unable to perform touch detection. In order to overcome the above-mentioned defects, the present invention enables the photosensitive sensor to collect two different optical signals...

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Abstract

The invention provides an optical touch device and method as well as a touch display device and method. The optical touch device comprises multiple photosensors, detection light sources, a control unit and a subtractor, wherein the multiple photosensors are alternately started and shut and are continuously started twice and shut twice as one detection period; the detection light sources are alternately started and shut; the control unit controls the start and shut of the photosensors and the detection light sources, so that the photosensors detect interference lights during the first start in each detection period and detect the sum of detection lights and interference lights during the second start; and the subtractor is used for subtracting signals detected by the photosensors during the second start in each detection period from signals detected by the photosensors during the first start in each detection period. The touch display device has the advantages that the structure is simple, the cost is low, and no matter whether the interference lights are stronger interference lights or not, touch display can be accurately carried out.

Description

technical field [0001] The present invention relates to the technical field of touch display, in particular to an optical touch device and method, and a touch display device and method. Background technique [0002] With the continuous development and progress of science and technology, various display systems are widely used in daily life. With the improvement of living standards, people are no longer satisfied with passively accepting the information provided by the display system. In recent years, a series of products such as touch LCD screens and IPADs have been developed. The display systems of these products are equipped with touch screens, which can display information The functions of display and information input are integrated to form a convenient and fast human-computer interaction method. [0003] The touch screen integrated on the display system is usually used to detect the touch position of a finger (or electronic pen) on the touch screen. According to diffe...

Claims

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Application Information

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IPC IPC(8): G06F3/042
Inventor 毛剑宏唐德明
Owner XIAN YISHEN OPTOELECTRONICS TECH CO LTD
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