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Infrared multi-point touch screen

A multi-touch screen, infrared technology, applied in the direction of instrument, electrical digital data processing, data processing input/output process, etc., to achieve stable performance, low cost and compact structure

Inactive Publication Date: 2013-08-28
上海优熠电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing resistive touch screens and infrared touch screens cannot be well applied to multi-touch technology.

Method used

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  • Infrared multi-point touch screen

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Experimental program
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Embodiment Construction

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention will be further elaborated below in conjunction with specific diagrams.

[0027] refer to figure 1 The infrared multi-point touch screen includes a liquid crystal panel 1, and a backlight module 2 is arranged behind the liquid crystal panel 1. The backlight module 2 generally includes an upper diffusion sheet 21 , an upper light collection sheet 22 , a lower light collection sheet 23 , a lower diffusion sheet 24 , a light guide plate 25 , an increased emission cover 26 , a reflective sheet 27 , and a module frame 28 .

[0028] refer to figure 1 , figure 2 , the backlight module 2 is provided with an infrared light source 3 , and is also provided with an optical transmission component for conducting the infrared rays emitted by the infrared light source 3 to the front of the liquid crystal panel 1 . The optical tr...

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Abstract

The invention relates to an infrared touch screen, in particular to an infrared multi-point touch screen which comprises a liquid crystal panel and a backlight module, wherein the backlight module is provided with an infrared light source and is also provided with an optical conducting assembly for conducting infrared rays sent by the infrared light source to the front of the liquid crystal panel; the backlight module is provided with photosensitive elements used for sensing the infrared rays, and the light-sensitive surfaces of the photosensitive elements face to the front of the liquid crystal panel. The infrared multi-point touch screen also comprises a signal processing system used for judging a touch position, the signal processing system is connected with the photosensitive elements, electric signals generated by the photosensitive elements are transmitted to a signal processing system, and the signal processing system obtains touch position information through analyzing the electric signals generated by the photosensitive elements. The signal processing system adopts a multi-point touch signal processing system capable of processing multi-point touch operations, and the multi-point touch signal processing system is connected with the photosensitive elements. The invention has the characteristics of low cost, suitability for large-area display, stable performance, better application in a multi-point touch technology, and the like.

Description

technical field [0001] The invention relates to a touch screen, in particular to an infrared touch screen. Background technique [0002] Now popular touch screens on the market mainly include resistive touch screens and infrared touch screens. The current production process is relatively easy to produce a resistive touch screen with a smaller area, but it is difficult to produce a resistive touch screen larger than 25 inches. The scope of application is mainly mobile phones, PDAs, netbooks and other devices with smaller screens. As the area of ​​the resistive touch screen increases, the cost will rise sharply, and the performance is difficult to guarantee. On the large-screen display that is becoming more and more popular now, it is inconvenient to adopt a resistive touch screen. In addition, the resistive touch screen itself is relatively fragile and can be easily scratched without causing damage. It can be seen that the resistive touch screen has been subjected to many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133G06F3/042
Inventor 程抒一周爱国窦晓鸣袁正秦键
Owner 上海优熠电子科技有限公司
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