Display and electronic apparatus

Patent metadata

Field	Value
Publication number	US-11150516-B2
Application number	US-201716080798-A
Country	US
Kind code	B2
Filing date	Feb 17, 2017
Priority date	Apr 5, 2016
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A display according to an embodiment of the disclosure includes a light-emitting device and a display panel unit. The light-emitting device includes a light guide plate, a light source, a reflecting plate, and a dot pattern. The light guide plate has a light-outputting surface including a plurality of band-shaped projections extending in a direction orthogonal to the light-entering end surface. The light source is disposed along the light-entering end surface. The reflecting plate is disposed to face the rear surface of the light guide plate. The dot pattern fixes the light guide plate and the reflecting plate to each other and serves as a light scatterer. The display panel unit includes a display panel, an optical sheet, and a fixing layer. The fixing layer adheres or sticks the display panel and the optical sheet to each other and serves as a light diffuser.

First claim

The invention claimed is:

1. A display comprising:
a light-emitting device that outputs illuminating light; and
a display panel unit having a display panel and that is disposed to overlap the light-emitting device and displays an image by utilizing the illuminating light, the light-emitting device including
a light guide plate having a light-entering end surface, a light-outputting surface including a plurality of projections extending in a direction orthogonal to the light-entering end surface, and a rear surface facing the light-outputting surface,
a light source disposed along the light-entering end surface and arranged so as to emit light into one or more of the plurality of projections along the light-entering end surface,
a first fixing layer disposed in contact with the light-outputting surface of the light guide plate and a first surface of an optical sheet such that the first fixing layer is arranged between the light-outputting surface of the light guide plate and the optical sheet; and
a second fixing layer disposed in contact with a second surface of the optical sheet and a first surface of the display panel such that the second fixing layer is arranged between the display panel and the optical sheet, and
wherein the optical sheet is a luminance-improving member that causes light output from the light-outputting surface of the light guide plate in an oblique direction to rise in a front direction toward the display panel.

2. The display according to claim 1 , wherein a gap is provided between the optical sheet and the light-outputting surface.

3. The display according to claim 1 , comprising:
a reflecting plate disposed to face the rear surface, the reflecting plate functioning to reflect and scatter light,
a dot pattern disposed in contact with the rear surface and the reflecting plate, the dot pattern fixing the light guide plate and the reflecting plate to each other, and serving as a light scatterer; and
wherein the dot pattern fixing the light guide plate and the reflecting plate to each other causes at least a portion of the rear surface to be brought in contact with an air layer.

4. The display according to claim 3 , wherein the dot pattern serves as a diffuser plate.

5. An electronic apparatus provided with a display, the display comprising:
a light-emitting device that outputs illuminating light; and
a display panel unit that is disposed to overlap the light-emitting device and displays an image by utilizing the illuminating light,
the light-emitting device including
a light guide plate having a light-entering end surface, a light-outputting surface including a plurality of projections extending in a direction orthogonal to the light-entering end surface, and a rear surface facing the light-outputting surface,
a light source disposed along the light-entering end surface and arranged so as to emit light into one or more of the plurality of projections along the light-entering end surface,
a reflecting plate disposed to face the rear surface, the reflecting plate functioning to reflect and scatter light, and
a dot pattern disposed in contact with the rear surface and the reflecting plate, the dot pattern fixing the light guide plate and the reflecting plate to each other, and serving as a light scatterer, the display panel unit including
a display panel that displays the image by modulating the illuminating light,
a first fixing layer disposed in contact with the light-outputting surface of the light guide plate and a first surface of an optical sheet such that the first fixing layer is arranged between the light-outputting surface of the light guide plate and the optical sheet; and
a second fixing layer disposed in contact with a second surface of the optical sheet and a first surface of the display panel such that the second fixing layer is arranged between the display panel and the optical sheet, and
wherein the optical sheet is a luminance-improving member that causes light output from the light-outputting surface of the light guide plate in an oblique direction to rise in a front direction toward the display panel.

6. The display according to claim 5 , wherein the second fixing layer operates to mitigate interference between the luminance-improving member and the plurality of band-shaped protections.

7. A display comprising: a display panel that displays images;
a light guide plate positioned on a rear side of the display panel, the light guide plate having a light-entering end surface, a light-outputting surface which is perpendicular to the light-entering end surface, the light-outputting surface including a plurality of projections extending from the light-entering end surface toward an end surface facing the light-entering end surface, and a rear surface facing the light-outputting surface;
a light source disposed along the light-entering end surface and arranged so as to emit light into one or more of the plurality of projections along the light-entering end surface,
a dot pattern disposed on the rear surface of the light guide plate;
a reflecting plate facing the rear surface of the light guide plate, the reflecting plate functioning to reflect and scatter light; and
a first fixing layer disposed in contact with the light-outputting surface of the light guide plate and a first surface of an optical sheet such that the first fixing layer is arranged between the light-outputting surface of the light guide plate and the optical sheet; and
a second fixing layer disposed in contact with a second surface of the optical sheet and a first surface of the display panel such that the second fixing layer is arranged between the display panel and the optical sheet, and
wherein the optical sheet is a luminance-improving member that causes light output from the light-outputting surface of the light guide plate in an oblique direction to rise in a front direction toward the display panel.

8. The display according to claim 7 , wherein the dot pattern fixes the reflecting plate to the light guide plate.

9. The display according to claim 7 , wherein the dot pattern scatters light propagating through the light guide plate from the light source.

10. The display according to claim 7 , wherein the second fixing layer serves as a light diffuser.

11. The display according to claim 7 , wherein the dot pattern is disposed in contact with the reflecting plate.

12. The display according to claim 7 , wherein the reflecting plate is a polyethylene terephthalate film.

13. The display according to claim 7 , wherein the projections have a prism shape.

14. The display according to claim 7 , wherein the projections extend perpendicularly with respect to the light-entering end surface.

15. The display according to claim 7 , wherein the light source comprises at least a light emitting diode.

16. The display according to claim 7 , wherein the light guide plate comprises a resin material.

Assignees

• Saturn Licensing Llc

Inventors

• Yamamoto Takeshi
• Miura Kouki
• Yoshimatsu Tomoyuki

Classifications

• G02F1/133504 Primary

  Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606) · CPC title

• G02B6/0038

  Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• F21S2/00 Primary

  Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction · CPC title

• G02F1/133615 Primary

  Edge-illuminating devices, i.e. illuminating from the side · CPC title