Light-emitting apparatus and display apparatus

Patent metadata

Field	Value
Publication number	US-11067851-B2
Application number	US-202016988151-A
Country	US
Kind code	B2
Filing date	Aug 7, 2020
Priority date	Aug 9, 2019
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A light-emitting apparatus according to the present invention, includes: a light source board on which a first light source group including a plurality of light sources and a sensor that detects light or temperature are disposed; and a reflection sheet that is disposed on a side of the light source board where the first light source group and the sensor are disposed, and includes an opening from which the first light source group is exposed, wherein the sensor is surrounded by the plurality of light sources.

First claim

What is claimed is:

1. A light-emitting apparatus comprising:
a light source board on which a first light source group including a plurality of light sources and a sensor that detects light or temperature are disposed; and
a reflection sheet that is disposed on a side of the light source board where the first light source group and the sensor are disposed, an opening from which the first light source group is exposed being formed on the reflection sheet,
wherein the sensor is surrounded by the plurality of light sources,
the plurality of light sources are disposed in rotational symmetric positions, and
on a plane that is parallel with the light source board,
each of the plurality of light sources has a substantially rectangular shape, and
for each of the plurality of light sources, a virtual line which passes through a center of the light source and is parallel with a short side of the light source, does not pass through the rotational symmetric axis.

2. The light-emitting apparatus according to claim 1 ,
wherein the sensor is disposed substantially at a center of the first light source group.

3. The light-emitting apparatus according to claim 1 ,
wherein the opening is larger than an area in which the first light source group is disposed.

4. The light-emitting apparatus according to claim 1 ,
wherein a space between the light source and the opening is substantially equal among the plurality of light sources.

5. The light-emitting apparatus according to claim 1 ,
wherein the opening has a rotational symmetric shape with respect to a rotational symmetric axis of the plurality of light sources.

6. The light-emitting apparatus according to claim 5 ,
wherein the sensor is disposed in a vicinity of the rotational symmetric axis.

7. The light-emitting apparatus according to claim 1 ,
wherein the plurality of light sources are four light sources, and
on the plane that is parallel with the light source board,
in two light sources adjacent to each other among the plurality of light sources, an extended line of one long side of one light source substantially matches with an extended line of one short side of the other light source.

8. The light-emitting apparatus according to claim 7 ,
wherein on the plane that is parallel with the light source board,
the opening has a substantially quadrangular shape, and
for each of a plurality of sides of the opening, the side is substantially parallel with a long side of one of the plurality of light sources, the long side facing the side.

9. The light-emitting apparatus according to claim 1 ,
wherein on the light source board,
a plurality of second light source groups each of which includes of one or more first light source groups, and each light emission of which is individually controlled, and
a plurality of sensors each of which detects light or temperature, and which respectively correspond to the plurality of second light source groups,
are disposed.

10. A display apparatus comprising:
the light-emitting apparatus according to claim 1 ; and
a display panel that displays an image by transmitting light emitted from the light-emitting apparatus.

11. A light-emitting apparatus comprising:
a light source board on which a first light source group including a plurality of light sources and a sensor that detects light or temperature are disposed; and
a reflection sheet that is disposed on a side of the light source board where the first light source group and the sensor are disposed, an opening from which the first light source group is exposed being formed on the reflection sheet,
wherein the sensor is surrounded by the plurality of light sources,
wherein on the light source board,
a plurality of second light source groups each of which includes of one or more first light source groups, and each light emission of which is individually controlled
a plurality of photo-sensors each of which detects light, and which respectively correspond to the plurality of second light source groups, and
a plurality of temperature sensors each of which detects temperature, and which respectively correspond to the plurality of second light source groups,
are disposed, and
wherein each of the plurality of second light source groups includes: a first light source group including a plurality of light sources surrounding a corresponding photo-sensor; and another first light source group including a plurality of light sources surrounding a corresponding temperature sensor.

12. The light-emitting apparatus according to claim 11 ,
wherein for each of the plurality of second light source groups, a distance from a center of the second light source group to the photo-sensor corresponding to the second light source group is substantially equal to a distance from the center of the second light source group to the temperature sensor corresponding to the second light source group.

13. A display apparatus comprising:
the light-emitting apparatus according to claim 11 ; and
a display panel that displays an image by transmitting light emitted from the light-emitting apparatus.

Assignees

• Canon Kk

Inventors

• Ishida Tetsuya
• Hoshino Hironobu

Classifications

• G02F1/133605

  including specially adapted reflectors · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title

• G02F1/133612

  Electrical details · CPC title

• G02F1/13318

  Circuits comprising a photodetector · CPC title