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Photodetector and display device provided with same

A light detection device, photodiode technology, applied in optics, photovoltaic power generation, static indicators, etc., can solve problems such as difficulty in high image quality and difficulty in adjusting the brightness of the display screen.

Active Publication Date: 2010-03-10
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it is difficult to adjust the brightness of the display screen using the optical sensor and obtain high-quality images.

Method used

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  • Photodetector and display device provided with same
  • Photodetector and display device provided with same
  • Photodetector and display device provided with same

Examples

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Embodiment approach

[0034] Below, refer to Figure 1 to Figure 11 A photodetection device and a display device according to an embodiment of the present invention will be described. First, the schematic configurations of the photodetection device and the display device of the present embodiment will be described. figure 1 It is a cross-sectional view showing a schematic configuration of a photodetection device according to an embodiment of the present invention. figure 2 means viewed from above figure 1 A plan view of the state of the photodetection device shown. image 3 is a brief representation of having figure 1 Plan view of the structure of a part of the display device of the light detection device shown. Among them, in figure 1 In , only the conductors and semiconductors constituting the active matrix substrate 20 to be described later are hatched. In addition, in figure 2 and image 3 In , only the main structural elements are shown in the figure.

[0035] Such as figure 1 A...

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Abstract

It is an object to provide a photodetector that can be configured to suppress dispersion of output characteristics among photodiodes and a display device provided with the photodetector. A display device provided with an active matrix substrate (20) that has a light transmissive base substrate (2), a plurality of active elements and a photodetector is used in an embodiment. The photodetector is comprised of a light shielding film (3) formed on the base substrate (2) and a photodiode (1) arranged on the upper layer of the light shielding film (3). The light shielding film (3) is overlapped withthe photodiode (1) in the depth direction of the base substrate (2). The photodiode (1) is provided with a silicon film (11) that is electrically isolated from the light shielding film (3). A p-layer(11c), an i-layer (11b) and an n-layer (11a) are arranged to be adjacent to each other in the plane direction in the silicon film (11). The area (length (Lp)) of the p-layer (11c) is formed to be larger than that (length (Ln)) of the n-layer (11a).

Description

technical field [0001] The present invention relates to a photodetection device and a display device having the same. Background technique [0002] In recent years, a display device represented by a liquid crystal display device has been equipped with an optical sensor to automatically adjust the brightness of a display screen according to the intensity of light around the display device. In addition, there is also known a display device in which a plurality of photosensors are arranged in a matrix. In this display device, a plurality of photosensors operate as one area sensor to obtain an image on the viewer's side. [0003] The photosensor can be mounted on the display device by mounting the photosensor as a discrete component on the display panel. In addition, the photosensor can also be integrally formed on the active matrix substrate by utilizing the formation process of the active element (TFT) or the peripheral circuit. [0004] Especially in the field of display d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/10G02F1/133G02F1/135
CPCG02F2001/13312G02F1/1362H01L31/105H01L31/02164H01L31/02165Y02E10/50H01L31/035281G02F1/13318G02F1/136209G02F1/13312
Inventor C·布朗加藤浩巳
Owner SHARP KK
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