Planar light source and illumination apparatus

Patent metadata

Field	Value
Publication number	US-10443794-B2
Application number	US-201615759936-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Dec 2, 2016
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

The present invention provides a planar light source and an illumination apparatus which have higher design property than that of conventional ones. The planar light source includes: a planar light emitting panel which has a light emitting surface; and a decorative member which covers the light emitting surface of the planar light emitting panel. A light emitting region which emits light when the planar light source is turned on and a non-light-emitting frame region which surrounds the light emitting region are provided on the light emitting surface. The decorative member has a pattern forming section. The pattern forming section includes a frame shielding section which covers entirety of the frame region in the front view, and a light-emission shielding section which extends from the frame shielding section so as to divide the light emitting region into a plurality of regions.

First claim

The invention claimed is:

1. A planar light source comprising:
a planar light emitting panel having a light emitting surface; and
a decorative member covering the light emitting surface of the planar light emitting panel,
wherein the light emitting surface comprises: a light emitting region emitting planar light when the planar light source is turned on; and a non-light-emitting frame region surrounding the light emitting region,
wherein the decorative member has a pattern forming section,
wherein the pattern forming section includes in a front view:
a frame shielding section covering an entire area of the frame region; and
a light-emission shielding section extending from the frame shielding section so as to divide the light emitting region into a plurality of regions,
wherein the light-emission shielding section overlaps with the light emitting region in a front view,
wherein the light-emission shielding section comprises a plurality of light transmitting holes, the light transmitting holes being a through hole through which light from the light emitting region of the planar light emitting panel can pass,
wherein part of the light emitting region of the planar light emitting panel is laid bare through the light transmitting holes,
wherein the decorative member comprises a main body plate section including the pattern forming section, the main body plate section being thinner than the planar light emitting panel,
wherein the decorative member further comprises a side-surface plate section bent from an end section of the main body plate section,
wherein the planar light emitting panel comprises: a planar light emitting tile; and a frame member protecting the planar light emitting tile,
wherein the frame member is made of resin and has elasticity, and
wherein part of the frame member is sandwiched by an end surface of the planar light emitting tile and the side-surface plate section.

2. The planar light source according to claim 1 , wherein the light-emission shielding section covers from 5% to 75% both inclusive of the light emitting region in a front view.

3. The planar light source according to claim 1 , wherein the planar light emitting panel constitutes one mirror surface together with the pattern forming section when the planar light source is turned off.

4. The planar light source according to claim 1 , wherein the pattern forming section has at least two of the light-emission shielding sections having an identical width, the at least two of the light-emission shielding sections dividing the light emitting region into at least three regions in a front view.

5. The planar light source according to claim 1 , wherein the light-emission shielding section comprises a shielding extending section extending with a longitudinal component and a lateral component in a front view.

6. An illumination apparatus comprising:
the planar light source according to claim 1 ; and
a mounting member that can be fixed to a mounting surface,
wherein the mounting member has one of a magnetic force generating section and a ferromagnetic section, whereas the planar light source has the other of the magnetic force generating section and the ferromagnetic section on a back surface side, the magnetic force generating section and the ferromagnetic section forming a pair with each other, and
wherein the planar light source is fixed to the mounting member by magnetic force generated between the magnetic force generating section and the ferromagnetic section.

7. An illumination apparatus comprising a plurality of planar light sources,
the plurality of planar light sources including a first planar light source and a second planar light source, each planar light source according to claim 1 ,
wherein the first planar light source and the second planar light source are arranged to be adjacent to each other, and
wherein the pattern forming section of the first planar light source and the pattern forming section of the second planar light source form one pattern when the first planar light source and the second planar light source are turned on.

8. A planar light source comprising:
a planar light emitting panel having a light emitting surface; and
a decorative member covering the light emitting surface of the planar light emitting panel,
wherein the light emitting surface comprises: a light emitting region emitting planar light when the planar light source is turned on; and a non-light-emitting frame region surrounding the light emitting region,
wherein the decorative member has a pattern forming section,
wherein the pattern forming section includes in a front view:
a frame shielding section covering an entire area of the frame region; and
a light-emission shielding section extending from the frame shielding section so as to divide the light emitting region into a plurality of regions,
wherein the light-emission shielding section overlaps with the light emitting region in a front view,
wherein the light-emission shielding section comprises a plurality of light transmitting holes, the light transmitting holes being a through hole through which light from the light emitting region of the planar light emitting panel can pass,
wherein part of the light emitting region of the planar light emitting panel is laid bare through the light transmitting holes,
wherein the decorative member comprises a main body plate section including the pattern forming section, the main body plate section being thinner than the planar light emitting panel, and
wherein some of the regions divided by the light-emission shielding sections have a different shielding rate, the shielding rate being defined as a ratio of an area where the pattern forming section is covering the light emitting region to an total area of the light emitting region.

9. An illumination apparatus comprising: a first planar light source; and a second planar light source, the second planar light source having a pattern forming section that is different from the pattern forming section of the first planar light source,
wherein the first planar light source and the second planar light source are arranged to be adjacent to each other, and
wherein the first planar light source and the second planar light source have a different shielding rate, the shielding rate being defined as a ratio of an area where the pattern forming section is covering a light emitting region to an total area of the light emitting region,
each of the planar light sources comprising:
a planar light emitting panel having a light emitting surface; and
a decorative member covering the light emitting surface of the planar light emitting panel,
wherein the light emitting surface comprises: the light emitting region emitting planar light when the planar light source is turned on; and a non-light-emitting frame region surrounding the light emitting region,
wherein the decorative member has the pattern forming section,
wherein the pattern forming section includes in a front view:
a frame shielding section covering an entire area of the frame region; and
a light-emission shielding section extending from the frame shielding section so as to divide the light emitting region into a plurality of regions,
wherein the light-emission shielding section overlaps with the light emitting region in a front view,
wherein the light-emission shielding section comprises a plurality of light transmitting holes, the light transmitting holes being a through hole through which light from the light emitting region of the planar light emitting panel can pass,
wherein part of the light emitting region of the planar light emitting panel is laid bare through the light transmitting holes, and
wherein the decorative member comprises

Assignees

• Kaneka Corp

Inventors

• Tanaka Michiru
• NAKABAYASHI Akane
• JONOO Naoko
• FUJISAWA Ko

Classifications

• F21Y2115/15

  Organic light-emitting diodes [OLED] · CPC title

• F21V21/096

  Magnetic devices · CPC title

• F21S2/005 Primary

  of modular construction · CPC title

• F21Y2115/20

  Electroluminescent [EL] light sources · CPC title

• F21V11/08

  using diaphragms containing one or more apertures · CPC title