Light source apparatus and display apparatus

• US 9,392,672 B2
• Filed: 06/02/2015
• Issued: 07/12/2016
• Est. Priority Date: 06/05/2014
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Kurita, Masanao, Kamiyoshihara, Masahiro, Matsuura, Yasuhiro
• Primary Examiner(s): TRAN, ANH Q
• Application Number:
  US14/728,231
• Publication Number:
  US 20150359067A1
• Time in Patent Office: 406 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133601 for spatial active dimming
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133611 including means for improving the brightness uniformity
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: G02F 2201/58 Arrangements comprising a monitoring photodetector
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: H05B 45/14 using electrical feedback from LEDs or from LED modules
• CPC Class Codes: H05B 47/11 by determining the brightness or colour temperature of ambient light
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

A light source apparatus according to the present invention, includes a substrate, a plurality of light source units provided on the substrate, a partition wall provided on the substrate and surrounding each of the light source units, and an optical sensor disposed between two or more of the light source units that are adjacent to each other, wherein the number of optical sensors is lower than the number of light source units.

Claims

1. A light source apparatus, comprising:

a substrate;

a plurality of light source units provided on the substrate;

a partition wall provided on the substrate and surrounding each of the light source units; and

a plurality of optical sensors, each of which is disposed between two or more of the light source units that are adjacent to each other,

wherein the number of optical sensors is lower than the number of light source units, and

each optical sensor is provided at an upper edge portion of the partition wall that is located on a side opposite to the substrate or inside of an opening portion of the partition wall.

2. The light source apparatus according to claim 1, wherein the optical sensor is provided for every two or more of the light source units.

3. The light source apparatus according to claim 1, wherein centers of the two or more light source units that are adjacent to each other are apart from the optical sensor at substantially an equal distance.

4. The light source apparatus according to claim 3, wherein the centers of the two light source units that are adjacent to each other are apart from the optical sensor at substantially an equal distance.

5. The light source apparatus according to claim 3, wherein the centers of four of the light source units that are adjacent to one another are apart from the optical sensor at substantially an equal distance.

6. The light source apparatus according to claim 1, wherein

a region of the substrate is divided into a plurality of divided regions by the partition wall,

the light source units are provided in the plurality of divided regions respectively, and

the optical sensor is disposed between two or more of the divided regions that are adjacent to each other.

7. The light source apparatus according to claim 1, wherein the optical sensor is disposed in a position where light that enters the optical sensor from each of the two or more light source units that are adjacent to each other is affected by the partition wall at substantially an equal degree.

8. The light source apparatus according to claim 1, wherein

the partition wall is provided with the opening portion in a direction substantially perpendicular to the substrate, and

the optical sensor is provided inside the opening portion.

9. The light source apparatus according to claim 8, further comprising a light-condensing member that is provided at an upper edge portion of the opening portion that is located on a side opposite to the substrate, in order to condense light entering the opening portion on a side where the optical sensor is provided.

10. The light source apparatus according to claim 1, wherein

the partition wall has a shielding surface corresponding to each of the light source units for shielding light that is emitted from the light source unit and goes toward other light source unit,

the partition wall is provided with the opening portion that extends from the shielding surface corresponding to one of the light source units and passes through one or more shielding surfaces corresponding to adjacent one or more of the light source units, and

the optical sensor is provided inside the opening portion.

11. The light source apparatus according to claim 10, wherein the opening portion is substantially parallel to the substrate.

12. The light source apparatus according to claim 1, wherein the optical sensor is provided on the substrate.

13. The light source apparatus according to claim 1, further comprising:

a processing circuit configured to process output signals of the optical sensors,

wherein the number of processing circuits is lower than the number of optical sensors, and

the processing circuit processes output signals of two or more of the optical sensors.

14. The light source apparatus according to claim 13, wherein the processing circuits are provided inside the partition wall.

18. A display apparatus, comprising:

the light source apparatus according to claim 1; and

a display unit configured to display an image on a screen by modulating light emitted from the light source apparatus.

15. A light source apparatus, comprising:

a substrate;

a plurality of light source units provided on the substrate;

a partition wall provided on the substrate and surrounding each of the light source units;

a plurality of optical sensors configured to detect light emitted from the light source units; and

a plurality of processing circuits configured to process output signals of the optical sensors,

wherein the number of processing circuits is lower than the number of optical sensors, and

the processing circuits are provided inside the partition wall.

16. The light source apparatus according to claim 15, wherein

the optical sensors are provided for the light source units respectively, and

the processing circuits process output signals of two or more of the optical sensors corresponding to two or more of the light source units that are adjacent to each other.

17. The light source apparatus according to claim 15, wherein the processing circuits process output signals of two or more of the optical sensors.