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Optical touch panel, liquid crystal display panel and method for determining touch position

A liquid crystal display panel, touch panel technology, applied in the direction of optics, nonlinear optics, static indicators, etc., can solve the problems that the manufacturing cost of optical touch panels cannot be further reduced, and the number is difficult to reduce, so as to achieve both sensing and analysis Degree, taking into account the effect of manufacturing cost

Inactive Publication Date: 2011-07-20
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the optical touch panel 100 is applied to a large-sized display panel, in order to maintain a certain sensing resolution, it is difficult to reduce the number of sensing light sources 120a, 120b and light sensor receivers 130a, 130b used, which leads to the known The optical touch panel faces the problem that the manufacturing cost cannot be further reduced

Method used

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  • Optical touch panel, liquid crystal display panel and method for determining touch position
  • Optical touch panel, liquid crystal display panel and method for determining touch position
  • Optical touch panel, liquid crystal display panel and method for determining touch position

Examples

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no. 1 example

[0051] Figure 2A and Figure 2B is a schematic diagram of an optical touch liquid crystal display panel in the first embodiment of the present invention, wherein Figure 2A is a top view of an optical touch liquid crystal display panel, and Figure 2B It is a cross-sectional view of an optical touch liquid crystal display panel. Please also refer to Figure 2A and Figure 2B , the optical touch liquid crystal display panel 200 includes a backlight 210 , a liquid crystal display panel 220 , a first reflector 230 , a second reflector 240 and a plurality of light sensors 250 . The backlight 210 provides visible light and invisible light L2. The liquid crystal display panel 220 is disposed above the backlight source 210 , and the liquid crystal display panel includes a pixel array 260 and a plurality of light emitting valves 270 located outside the pixel array 260 . The first reflector 230 is disposed above the light-emitting light valve 270 . Each light sensor 250 is resp...

no. 2 example

[0065] Figure 5A and Figure 5B is a schematic diagram of an optical touch panel in the second embodiment of the present invention, wherein Figure 5A is the top view of the optical touch panel, and Figure 5BIt is a cross-sectional view of an optical touch panel. The optical touch panel of this embodiment is similar to the optical touch liquid crystal display panel of the first embodiment, so the same components are denoted by the same reference numerals, and the optical touch panel of this embodiment is not limited to the liquid crystal display function. display panel.

[0066] Please also refer to Figure 5A and Figure 5B , the optical touch panel 500 of this embodiment includes a light source 510 , a touch panel 520 , a first reflector 230 , a second reflector 240 and a plurality of light sensors 550 . The touch panel 520 includes a touch area 560 and a plurality of light valves 270 located outside the touch area 560, and in this embodiment, the optical touch panel...

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Abstract

The present invention discloses an optical touch panel, a liquid crystal display panel and a method for determining a touch position, wherein the optical touch panel comprises a backlight source, a liquid crystal display panel, a first reflector, a second reflector and a plurality of optical sensors. The liquid crystal display panel comprises a pixel array and a plurality of light outlet valves which is provided outside the pixel array. The first reflector is configured above the light outlet valves. The optical sensors are configured below the second reflector. The light outlet valves and the optical sensors are switched on in turn. When each light outlet valve is switched on in turn, the non-visible light which is provided by the backlight source pass through the light outlet valves, is reflected by the first reflector and the second reflector in turn and is extracted by a corresponding optical sensor. According to the invention, under a precondition that the sensing resolution is not reduced, the number of sensing light sources is reduced for further reducing the manufacturing cost thereby effectively settling a relationship between manufacturing cost reduction and sensing resolution keeping.

Description

technical field [0001] The invention relates to a touch panel and a touch method thereof, in particular to an optical touch liquid crystal display panel, an optical touch panel and a method for determining a touch position. Background technique [0002] In recent years, with the rapid development of various applications such as information technology, wireless mobile communication, and information home appliances, in order to achieve more convenience, smaller volume, and more humanization, touch panels have gradually replaced keyboards and mice, and have become many The primary input device for information products. Generally speaking, touch panels can be roughly divided into resistive touch panels, capacitive touch panels, optical touch panels, acoustic wave touch panels, electromagnetic touch panels, etc. Among them, capacitive and optical touch panels Touch panels are more concerned by the market. [0003] figure 1 A schematic cross-sectional view of a known optical to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042G02F1/133
CPCG06F3/042G06F3/0421G02F1/133G02F2001/133388G02F1/13338G02F2203/11G02F1/133388
Inventor 范富诚庄幸蓉伍玉平牛慈伶
Owner AU OPTRONICS CORP