DISPLAY DEVICE

• US 20090146992A1
• Filed: 11/24/2008
• Published: 06/11/2009
• Est. Priority Date: 12/05/2007
• Status: Active Grant

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Matsui, Yasuyki, Tanaka, Tsutomu, Takama, Daisuke, FUKUNAGA, Yoko
• Granted Patent: US 8,624,846 B2
• Time in Patent Office: Days
• US Class Current: 345/214
• CPC Class Codes: G02F 1/13312 Circuits comprising photodetectors for purposes other than feedback
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: G02F 2203/11 involving infrared radiation

Abstract

Disclosed herein is a display device including, a display section having a display surface, and capable of displaying information on the display surface, and a light storing section capable of receiving incident light including visible light, absorbing a part of the incident light, and outputting the part of the incident light as an afterglow including non-visible light, wherein a light sensor configured to detect an object to be detected on a side of the display surface on a basis of a non-visible light component of output light from the light storing section is disposed within the display section.

Claims

1. A display device comprising:

a display section having a display surface, and capable of displaying information on said display surface; and

a light storing section capable of receiving incident light including visible light, absorbing a part of the incident light, and outputting the part of the incident light as an afterglow including non-visible light;

wherein a light sensor configured to detect an object to be detected on a side of said display surface on a basis of a non-visible light component of output light from said light storing section is disposed within said display section.

2. The display device according to claim 1,

wherein said light storing section is disposed within said display section.

3. The display device according to claim 2,

wherein said display section includes

an illuminating section configured to produce illuminating light including visible light,

said light storing section formed by a light storing material, and capable of absorbing a part of said illuminating light, outputting remaining said illuminating light other than the absorbed said part of the illuminating light, and outputting the absorbed said part of the illuminating light as an afterglow including non-visible light,

a light modulating section configured to receive output light incident on said light modulating section from said light storing section, modulate the incident output light according to an input signal, and emit the modulated output light,

said display surface emitting, to an outside, said output light having said information added to said output light by being modulated by said light modulating section, and

the light sensor configured to detect non-visible light from reflected light resulting from said output light being reflected by the object to be detected on the side of said display surface.

4. The display device according to claim 3,

wherein said illuminating section includes

a light source, and

a light guide plate configured to convert light from said light source into said illuminating light in a plane shape,

said illuminating section is disposed on an anti-display surface side of said display section, and said light storing section is formed between a side of said illuminating section and said light modulating section.

5. The display device according to claim 2,

wherein said display section includes

said display surface,

said light storing section formed by a light storing material, and capable of absorbing a part of extraneous light incident on said light storing section from said display surface, outputting remaining said extraneous light, and outputting the absorbed said part of the extraneous light as an afterglow including non-visible light,

a reflecting surface for reflecting output light from said light storing section to emit the output light from said display surface to an outside,

a light modulating section configured to modulate said output light according to an input signal in an optical path in a mid course of said output light from said light storing section being reflected by said reflecting surface and emitted from said display surface, and

the light sensor configured to detect non-visible light from reflected light resulting from the output light from said light storing section being reflected by the object to be detected on the side of said display surface.

6. The display device according to claim 2,

wherein in said display section, a plurality of pixel regions configured to dispose a pixel and a plurality of sensor regions configured to dispose said light sensor are determined regularly as viewed from said display surface, and

said light storing section is formed in each of said pixel regions.

7. The display device according to claim 6,

wherein said non-visible light is infrared light,

said light sensor is an infrared light sensor having sensitivity to the infrared light, and

said light storing section is formed by making a red light transmitting filter contain a light storing material.

8. The display device according to claim 2,

wherein in said display section, a plurality of pixel regions configured to dispose a pixel and a plurality of sensor regions configured to dispose said light sensor are determined regularly as viewed from said display surface, and

said light storing section is formed in each of said sensor regions.

9. The display device according to claim 1, further comprising

a stylus pen having said light storing section in a region including a tip as an accessory.

10. The display device according to claim 9,

wherein said display section includes

an illuminating section configured to produce illuminating light including visible light,

a light modulating section configured to receive said illuminating light incident on the light modulating section, modulate the incident illuminating light according to an input signal, and emit the modulated illuminating light, and

said display surface for emitting said illuminating light modulated by said light modulating section to an outside.

11. A display device comprising:

display means having a display surface, and capable of displaying information on said display surface; and

light storing means capable of receiving incident light including visible light, absorbing a part of the incident light, and outputting the part of the incident light as an afterglow including non-visible light;

wherein a light sensor configured to detect an object to be detected on a side of said display surface on a basis of a non-visible light component of output light from said light storing means is disposed within said display means.