LIGHT EMITTING APPARATUS, LIGHT EMITTING UNIT, DISPLAY APPARATUS, ELECTRONIC DEVICE AND LIGHT EMITTING ELEMENT

• US 20150091787A1
• Filed: 09/24/2014
• Published: 04/02/2015
• Est. Priority Date: 10/01/2013
• Status: Active Grant

• Current Assignee: Sony Semiconductor Solutions Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ohmae, Akira, Nishinaka, Ippei, Ohashi, Tatsuo, Sakoda, Gen, Biwa, Goshi, Kataoka, Yusuke
• Granted Patent: US 10,168,004 B2
• Time in Patent Office: Days
• US Class Current: 345/83
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2107/50 on planar substrates or supports, but arranged in different planes or with differing orientation, e.g. on plate-shaped supports with steps on which light-generating elements are mounted
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/045 Compensation of drifts in the characteristics of light emitting or modulating elements
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/20 with a particular shape, e.g. curved or truncated substrate
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector

Abstract

There is provided a light emitting apparatus, including a plurality of light emitting elements having biased light properties; and a mounting substrate where the light emitting elements are arranged such that the biased light properties are complemented within a group including at least two light emitting elements among a plurality of the light emitting elements. Also, there are provided a light emitting unit, a display apparatus, an electronic device and a light emitting element using a plurality of point light sources.

Claims

1. A light emitting apparatus, comprising:

a mounting substrate; and

a plurality of light emitting elements arranged on the mounting substrate, the plurality of light emitting elements comprising a first light emitting element having a first biased light emission intensity distribution and a second light emitting element having a second biased light emission intensity distribution,

wherein a group of light emitting elements including the first and second light emitting elements is arranged on the mounting substrate such that a cumulative light emission intensity distribution of the group of light emitting elements is less distorted than either the first biased light emission intensity distribution or the second biased light emission intensity distribution.

2. The light emitting apparatus of claim 1, wherein the group of light emitting elements is arranged such that the first biased intensity distribution is biased in a first direction and the second biased intensity distribution is biased in a second direction different from the first direction.

3. The light emitting apparatus of claim 2, wherein light intensity distributions of light emitting elements in the group of light emitting elements are in a point symmetry.

4. The light emitting apparatus of claim 3, wherein the first light emitting elements comprises:

a semiconductor layer where a first conductive layer, an active layer and a second conductive layer are laminated,

a first electrode layer electrically connected to the first conductive layer; and

a second electrode layer electrically connected to the second conductive layer,

wherein the first electrode layer and the second electrode layer are offset from a center of the first light emitting element.

5. The light emitting apparatus of claim 1, wherein the cumulative light emission intensity distribution of the group of light emitting elements is substantially uniform.

6. A display apparatus, comprising:

a mounting substrate;

a plurality of light emitting units each including a pixel comprising light emitting elements having respective biased light emission intensity distributions and different light emitting wavelengths; and

a driving circuit configured to drive the plurality of light emitting units based on a video signal,

wherein the plurality of the light emitting units are arranged such that a cumulative light emission intensity distribution of a group of light emitting elements having a same wavelength and comprising light emitting elements in at least two of the plurality of the light emitting units is less distorted than any one of the respective biased light emission intensity distributions.

7. The display apparatus according to claim 6, wherein the plurality of light emitting units comprises:

a plurality of light emitting units of a first type including a first light emitting unit comprising a first plurality of light emitting elements arranged so that a cumulative light emission intensity distribution of the first plurality of light emitting elements is biased in a first direction; and

a plurality of light emitting units of a second type including a second light emitting unit comprising a second plurality of light emitting elements arranged so that a cumulative light emission intensity distribution of the second plurality of light emitting elements is biased in a second direction different from the first direction,

wherein the plurality of light emitting units of the first type and the plurality of light emitting units of the second type are arranged in alternating rows on the mounting substrate.

8. The display apparatus according to claim 6, wherein the plurality of light emitting units comprises:

a plurality of light emitting units of a first type including a first light emitting unit comprising a first plurality of light emitting elements arranged so that a cumulative light emission intensity distribution of the first plurality of light emitting elements is biased in a first direction; and

a plurality of light emitting units of a second type including a second light emitting unit comprising a second plurality of light emitting elements arranged as a 180 degree rotation of how the first plurality of light emitting elements are arranged so that a cumulative light emission intensity distribution of the second plurality of light emitting elements is biased in a second direction opposite the first direction,

wherein the plurality of light emitting units of the first type and the plurality of light emitting units of the second type are arranged in alternating rows on the mounting substrate.

9. An electronic device, comprising:

a display apparatus, including;

a mounting substrate;

a plurality of light emitting units each including a pixel comprising light emitting elements having respective biased light emission intensity distributions and different light emitting wavelengths;

a driving circuit configured to drive the plurality of light emitting units based on a video signal; and

a display control unit configured to send the video signal to the display apparatus,

wherein the plurality of the light emitting units are arranged on the mounting substrate such that a cumulative light emission intensity distribution of a group of light emitting elements having a same wavelength and comprising light emitting elements in at least two of the plurality of light emitting units is less distorted than any one of the respective biased light emission intensity distributions.

10. A light emitting apparatus, comprising:

a mounting substrate; and

a plurality of light emitting elements, each having a biased light emission intensity distribution in a first direction and a substantially uniform light emission intensity distribution in a second direction orthogonal to the first direction,

wherein the plurality of the light emitting elements are arranged along a surface of the mounting substrate such that each of the plurality of the light emitting units has a substantially uniform intensity distribution in a predetermined direction.

11. A light emitting unit, comprising:

a mounting substrate;

at least three light emitting elements arranged on the mounting substrate along first and second directions orthogonal to each other and biased relative to each other in the second direction,

wherein a requested view angle in the first direction is higher than a requested view angle in the second direction.

12. The light emitting unit according to claim 11, wherein the at least three light emitting elements are biased relative to each other in the second direction by being displaced relative to each other in the second direction, the amount of displacement being based on sizes of the at least three light emitting elements.

13. An electronic device, comprising:

a display apparatus, including;

a mounting substrate;

a plurality of light emitting units arranged on the mounting substrate, a light emitting unit of the plurality of light emitting units including a pixel comprising a plurality of light emitting elements having different light emitting wavelengths, each of the plurality of light emitting elements having;

a semiconductor layer where a first conductive layer, an active layer and a second conductive layer are laminated,

a first electrode layer electrically connected to the first conductive layer,

a second electrode layer electrically connected to the second conductive layer, and

a reflection layer formed in contact with an opposite side of the first conductive layer of the first electrode,

wherein the semiconductor layer, the first electrode layer, the second electrode layer, and the reflection layer are offset from a center the light emitting element when viewed from an upper face the light emitting element;

a driving circuit configured to drive the light emitting units based on a video signal; and

a display control unit configured to send the video signal to the display apparatus.

14. A light emitting apparatus, comprising:

a mounting substrate; and

a plurality of light emitting elements arranged on the mounting substrate and comprising a first light emitting element and a second light emitting element, the first light emitting element comprising a first positive electrode offset in a first direction from a center of the first light emitting element, the second light emitting element comprising a second positive electrode offset in a second direction from a center of the second light emitting element,

wherein the first and second light emitting elements are arranged on the mounting substrate such that a cumulative light emission intensity distribution of first and second light emitting elements is less distorted than either a light emission intensity distribution of the first light emitting element or a light emission intensity distribution of the second light emitting element.

15. The light emitting apparatus of claim 14, wherein the cumulative light emission distribution of the first positive electrode and the second positive electrode is substantially uniform.

16. A light emitting apparatus, comprising:

a mounting substrate; and

a plurality of light emitting elements arranged on the mounting substrate, at least three of the plurality of light emitting elements having respective biased light emission intensity distributions,

wherein the at least three of the light emitting elements are arranged on the mounting substrate such that a cumulative light emission intensity distribution of the at least three of the light emitting elements is less distorted in a first direction than any one of the respective biased light emission intensity distribution.

17. The light emitting apparatus of claim 16, wherein the cumulative light emission intensity distribution is substantially uniform in the first direction.

18. A light emitting apparatus, comprising:

a mounting substrate; and

a plurality of light emitting elements arranged on the mounting substrate, the plurality of light emitting elements comprising first, second, and third light emitting elements having respective biased light emission intensity distributions,

wherein the first, second, and third light emitting elements are arranged on the mounting substrate such that a cumulative light emission intensity distribution of the at least three of the light emitting elements is less distorted in a first direction than any one of the respective biased light emission intensity distributions, and wherein no two elements of the first, second and third light emitting elements are arranged in parallel to one another in the first direction.

19. The light emitting apparatus of claim 18, wherein the cumulative light emission intensity distribution is substantially uniform in the first direction.