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Touch type input device

An input device and touch technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve problems such as the inability to realize multi-touch sensing and reduce the accuracy of sensing

Inactive Publication Date: 2010-12-22
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more commonly used touch input devices are resistive and capacitive, but both of them need to install a sensing circuit on the panel, and cannot realize multi-touch sensing
In addition, such touch input devices are susceptible to the influence of environmental electric fields, thereby reducing the accuracy of sensing

Method used

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Examples

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Embodiment Construction

[0011] The touch input device provided by the technical solution will be further described in detail below in conjunction with multiple embodiments and multiple drawings.

[0012] Please also refer to figure 1 and figure 2 , the first embodiment of the technical solution provides a touch input device 100, which includes an infrared light source module 110, a first polarizing plate 120, a stress sensing plate 130, two infrared cameras 140, two second polarizing slice 150 and image processor 160.

[0013] The infrared light source module 110 is used for providing infrared light. In this embodiment, the infrared light source module 110 includes a plurality of infrared light sources 111 and a light guide plate 112 . Multiple infrared light sources 111 are used to emit infrared light and make the infrared light incident into the light guide plate 112 , and the light guide plate 112 is used to uniformly emit the infrared light incident by the infrared light sources 111 from the ...

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Abstract

The invention provides a touch type input device comprising an infrared light supply module, a first polaroid, a stress sensing chip, at least one second polaroid, at least one infrared camera and an image processor, wherein the infrared light supply module, the first polaroid and the stress sensing chip are sequentially arranged close to each other; the stress sensing chip is arranged between the first polaroid and the second polaroid and is used for internally generating stress when touched, therefore first polarized light generates double refraction when passing through the stress sensing chip and then is emitted; the polarization direction of the second polaroid is perpendicular to the polarization direction of the first polaroid; the infrared camera is used for acquiring an interference fringe image generated by the stress sensing chip due to stress through the second polaroid, and the image processor is connected with the infrared camera and used for receiving and processing theinterference fringe image acquired by the infrared camera to judge the touched position and touch loci of the stress sensing chip.

Description

technical field [0001] The invention relates to an input device, in particular to a touch input device. Background technique [0002] With the development of society and the advancement of science and technology, touch screens with more humanized interfaces and easier input are widely used in displays such as personal computers, mobile phones, televisions, cameras, and measuring instruments. See document A novelgestural input device for virtual reality, Maggioni, C.; Virtual Reality Annual International Symposium, 1993., 1993 IEEE18-22 Sept. 1993 Page(s): 118-124. [0003] According to the medium used and the working principle, the touch screen can be divided into resistive, capacitive, infrared and surface acoustic wave. At present, the commonly used touch input devices are resistive type and capacitive type, but both of them need to install a sensing circuit on the panel, and cannot realize multi-touch sensing. In addition, such touch input devices are susceptible to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042G06F3/033
CPCG06F2203/04104G06F3/042
Inventor 李俊佑
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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