Photodetector and display device

Patent metadata

Field	Value
Publication number	US-10585329-B2
Application number	US-201815917961-A
Country	US
Kind code	B2
Filing date	Mar 12, 2018
Priority date	Mar 14, 2017
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

According to one embodiment, a photodetector includes a sensor unit including at least one photosensor, a liquid crystal element including a first substrate includes a plurality of first control electrodes, a second substrate including a second control electrode, and a liquid crystal layer held between the first substrate and the second substrate, a liquid crystal controller which controls a voltage to be applied to the liquid crystal layer for forming a first lens that is opposed to the photosensor in the liquid crystal layer, and a sensor controller which controls the sensor unit.

First claim

What is claimed is:

1. A display device comprising:
a first substrate comprising a photosensor, a plurality of first control electrodes, and a pixel electrode;
a second substrate comprising a light-shielding body including an opening opposed to the photosensor, a second control electrode arranged at the opening, a common electrode, and a transparent insulating layer arranged in the second region; and
a liquid crystal layer held between the first substrate and the second substrate,
the liquid crystal layer including a first region between the photosensor and the opening, and a second region between the pixel electrode and the common electrode,
wherein a first thickness of the first region is greater than a second thickness of the second region, and
the transparent insulating layer has a thickness greater than the second thickness.

2. The display device of claim 1 , wherein the pixel electrode is a reflective electrode, and the common electrode is a transparent electrode.

3. The display device of claim 1 , wherein the pixel electrode and the first control electrodes are located in a same layer, and are formed of a same material.

4. The display device of claim 1 , wherein the common electrode and the second control electrode are formed of a same material.

Assignees

• Japan Display Inc

Inventors

• Nakanishi Takayuki
• Yata Tatsuya
• Koito Takeo

Classifications

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F2201/123

  pixel · CPC title

• G02F1/133553

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title