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Area sensor and liquid crystal display device with area sensor

A technology of liquid crystal display devices and sensors, which is applied in the direction of identification devices, instruments, static indicators, etc., and can solve the problems of not being able to read the images of the display panel

Inactive Publication Date: 2011-12-14
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, there is a problem that the image on the display panel cannot be read in either the case where the ambient illuminance is bright or the case is dark.

Method used

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  • Area sensor and liquid crystal display device with area sensor
  • Area sensor and liquid crystal display device with area sensor
  • Area sensor and liquid crystal display device with area sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0094] The following is based on Figure 1 to Figure 13 One embodiment of the present invention will be described. In addition, the present invention is not limited thereto.

[0095] In this embodiment, a touch-panel-integrated liquid crystal display device having an area sensing function (specifically, a touch-panel function) will be described.

[0096] First, refer to figure 2 The structure of the touch-panel-integrated liquid crystal display device of this embodiment will be described. figure 2 The illustrated touch-panel-integrated liquid crystal display device 100 (also simply referred to as liquid crystal display device 100 ) has a touch-panel function for detecting an input position by detecting an image on the surface of the display panel by an optical sensing element provided in each pixel.

[0097] Such as figure 2 As shown, the touch-panel-integrated liquid crystal display device 100 of this embodiment includes a liquid crystal panel 20 (position detection un...

Embodiment approach 2

[0203] exist Figure 14 In the figure, the structure of the touch-panel-integrated liquid crystal display device 200 (also simply referred to as the liquid crystal display device 200 ) according to the second embodiment of the present invention is shown. Figure 14 The illustrated liquid crystal display device 200 has a touch panel function that detects an input position by detecting an image on the surface of the display panel by a light sensor element provided in each pixel. Such as Figure 14 As shown, the touch-panel-integrated liquid crystal display device 200 of this embodiment includes a liquid crystal panel 120 (position detection unit) and a backlight 10 (light emitting unit) provided on the rear side of the liquid crystal panel 120 to illuminate the liquid crystal panel.

[0204] The configuration of the liquid crystal panel 120 is substantially the same as that of the liquid crystal panel 20 in the liquid crystal display device 100 described in Embodiment 1. FIG. ...

Embodiment approach 3

[0222] As described below, according to Figure 16 A third embodiment of the present invention will be described. In addition, the present invention is not limited thereto.

[0223] In Embodiment 1 above, a touch-panel-integrated liquid crystal display device having an area sensing function (specifically, a touch panel function) was described, but in Embodiment 3, an area that is not integrated with the display device is described. sensor.

[0224] Figure 16 The illustrated area sensor 80 includes a sensor unit 81 that detects an input position by detecting an image on a detection target surface 80 a through a plurality of photosensor elements 30 provided on a substrate, thereby realizing a touch panel function.

[0225] Such as Figure 16 As shown, the area sensor 80 includes: a sensor unit 81 (position detection unit) having a plurality of light sensor elements 30 on a substrate 83; 82. The photosensor element 30 is formed of a photodiode or a phototransistor, and det...

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Abstract

A liquid crystal display device of the present invention includes a liquid crystal panel (20) having an area sensor function of detecting the position of an input from an outside source by detecting an image on a panel surface. The liquid crystal panel (20) (position detecting section), provided with visible light sensors (31A) each containing light sensor elements (30) that detect the intensity of received visible light and infrared light sensors (31B) each containing light sensor elements (30) that detect the intensity of received infrared light, which detects an input position by the visible light sensors (31A) and the infrared light sensors (31B) separately detecting an image on the detector surface. The liquid crystal display device further includes a backlight (light-emitting section) for irradiating the liquid crystal panel (20) with light containing infrared light. This achieves an area sensor capable of accurate position detection in a wide range of environmental illuminances and a liquid crystal display device equipped with such an area sensor.

Description

technical field [0001] The present invention relates to a liquid crystal display device including an optical sensor element, an area sensor for detecting a position input from the outside, and such an area sensor. Background technique [0002] Among display devices such as liquid crystal display devices, touch panel-integrated display devices having a touch panel (area sensor) function capable of detecting the touched position when the panel surface is touched with an input pen have been developed. [0003] In the existing touch panel integrated display device, the resistive film method (the method of detecting the input position by contacting the upper conductive substrate and the lower conductive substrate when pressing), the electrostatic capacitance method (the method of detecting the capacitance of the touched part Changes to detect the input position) become mainstream. [0004] However, in recent years, the development of liquid crystal display devices equipped with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G02F1/133G02F1/1333G02F1/1335G02F1/13357G09F9/00G09F9/30
CPCG06F3/0412G06F3/042G02F1/1336G02F2203/11G02F2001/13312G02F1/13312
Inventor 野间干弘宫崎伸一高滨健吾吉本良治岩崎圭介
Owner SHARP KK
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