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Optical sensor, semiconductor device, and liquid crystal panel

A light sensor and semiconductor technology, applied in the field of light sensors, can solve problems such as inability to detect changes in light, and achieve the effects of improving light detection sensitivity and light utilization efficiency

Inactive Publication Date: 2012-05-23
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the useful light sensor cannot detect the change of the light

Method used

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  • Optical sensor, semiconductor device, and liquid crystal panel
  • Optical sensor, semiconductor device, and liquid crystal panel
  • Optical sensor, semiconductor device, and liquid crystal panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] figure 1 is a cross-sectional view showing a schematic configuration of the semiconductor device 100 according to Embodiment 1 of the present invention. The semiconductor device 100 includes: a substrate 101, a thin film diode 130 formed on the substrate 101 with a base layer 103 as an insulating layer interposed therebetween, a light sensor 132 having a light shielding layer 160 provided between the substrate 101 and the thin film diode 130, and a thin film Transistor 150. The substrate 101 is preferably light-transmitting. exist figure 1 In order to simplify the drawing, only a single photosensor 132 and a single thin film transistor 150 are shown, but a plurality of photosensors 132 and a plurality of thin film transistors 150 can be formed on a common substrate 101 . In addition, in figure 1 In the figure, for easy understanding, a cross-sectional view of the photosensor 132 and a cross-sectional view of the thin film transistor 150 are shown in the same draw...

Embodiment approach 2

[0097] In Embodiment 2, a liquid crystal panel including a semiconductor device having the photodetection function described in Embodiment 1 will be described.

[0098] Figure 4 It is a cross-sectional view showing a schematic configuration of a liquid crystal display device 500 including a liquid crystal panel 501 according to the second embodiment.

[0099] The liquid crystal display device 500 includes: a liquid crystal panel 501 ; an illuminating device 502 for illuminating the backside of the liquid crystal panel 501 ;

[0100] The liquid crystal panel 501 includes: a TFT array substrate 510 and an opposing substrate 520 , both of which are light-transmitting plate-like members; and a liquid crystal layer 519 sealed between the TFT array substrate 510 and the opposing substrate 520 . Materials for forming the TFT array substrate 510 and the counter substrate 520 are not particularly limited. For example, the same materials as those used in conventional liquid crystal p...

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Abstract

Disclosed is an optical sensor, wherein the light detection sensitivity of a thin film diode is improved by improving the light use efficiency, even if semiconductor layer of the thin film diode is thin, and by means of a light blocking layer, the electrode of the thin film diode is prevented from being short-circuited. On one side of a substrate a substrate (101), the thin film diode (130) having a first semiconductor layer (131) that includes at least an n-type region (131n) and a p-type region (131p) is provided, and the light blocking layer (160) is provided between the substrate and the first semiconductor layer. On the light blocking layer surface facing the first semiconductor layer, a metal oxide layer (180) is formed. On the metal oxide layer surface facing the first semiconductor layer, recesses and protrusions are formed, and the first semiconductor layer has recesses and protrusions that match the recesses and protrusions of the metal oxide layer.

Description

technical field [0001] The present invention relates to an optical sensor including a thin film diode (TFD) having a semiconductor layer including at least an n-type region and a p-type region. In addition, the present invention also relates to a semiconductor device including a thin film diode and a thin film transistor (Thin Film Transistor: TFT). Furthermore, the present invention also relates to a liquid crystal panel including the semiconductor device. Background technique [0002] A touch sensor function can be realized by installing a light sensor including a thin film diode in a display device. In such a display device, touching the viewer-side surface (that is, the display surface) of the display device with a finger or a stylus will change the incident light from the display surface side, and by using an optical sensor to detect the intensity of the incident light change, and the input of information can be performed. [0003] In such a display device, there is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/146G09F9/00H01L29/786H01L31/10
CPCH01L31/101H01L27/1214H01L31/02164H01L27/14601
Inventor 织田明博金子诚二
Owner SHARP KK
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