OPTICAL DEVICE, DISPLAY DEVICE, AND METHOD FOR MANUFACTURING LIGHT EMITTING ELEMENT

• US 20180329212A1
• Filed: 08/30/2016
• Published: 11/15/2018
• Est. Priority Date: 10/28/2015
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: AIKI, KAZUMA
• Granted Patent: US 10,451,880 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 2027/0112 comprising device for genereting colour display
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0174 holographic
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 6/0026 Wavelength selective element, sheet or layer, e.g. filter or grating
• CPC Class Codes: G02B 6/003 Lens or lenticular sheet or layer
• CPC Class Codes: G02B 6/005 provided by one optical element, or plurality thereof, placed on the light output side of the light guide
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2933/0016 relating to electrodes
• CPC Class Codes: H01L 2933/0025 relating to coatings
• CPC Class Codes: H01L 33/0062 for devices with an active region comprising only III-V compounds
• CPC Class Codes: H01L 33/0075 comprising nitride compounds
• CPC Class Codes: H01L 33/30 containing only elements of Group III and Group V of the Periodic Table
• CPC Class Codes: H01L 33/32 containing nitrogen
• CPC Class Codes: H01L 33/382 the electrode extending partially in or entirely through the semiconductor body
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

A display device includes a frame and an image display device. The image display device includes an image forming device, a light guide device, and a lens system. The image forming device includes light emitting elements 300 arranged in a two-dimensional matrix. Each of the light emitting elements 300 has a laminated structure 301 including at least one layer of light emitting laminates 310, 320, and 330 each including a first electrode, a second electrode, and a light emitting layer provided between the first electrode and the second electrode. The laminated structure 301 has a through hole 360 through which light from the light emitting layer is emitted toward the lens system. An antireflection layer 370 is formed in a portion of the laminated structure facing the lens system.

Claims

1. An optical device comprising:

an image forming device; and

a lens system for projecting an image from the image forming device on an outside, wherein

the image forming device includes light emitting elements arranged in a two-dimensional matrix,

each of the light emitting elements has a laminated structure including at least one layer of a light emitting laminate including a first electrode, a second electrode, and a light emitting layer provided between the first electrode and the second electrode,

the laminated structure has a through hole which is formed in a lamination direction of the laminated structure and through which light from the light emitting layer is emitted toward the lens system, and

an antireflection layer is formed in a portion of the laminated structure facing the lens system.

2. The optical device according to claim 1, wherein the antireflection layer is formed up to an edge portion of the through hole in the laminated structure.

3. The optical device according to claim 1, wherein each of the light emitting elements has a laminated structure including three layers of a light emitting laminate that emits red light, a light emitting laminate that emits green light, and a light emitting laminate that emits blue light.

4. The optical device according to claim 1, wherein each of the light emitting elements further includes a condenser lens for condensing light emitted from the through hole.

5. The optical device according to claim 1, wherein

the image forming device further includes a circuit board on which a light emitting element driving circuit is provided, and

each of the light emitting elements is connected to the light emitting element driving circuit provided on the circuit board.

6. The optical device according to claim 1, wherein the image forming device further includes a support substrate constituting the laminated structure on a light emitting side.

7. A display device comprising:

(a) a frame mounted on a head of an observer; and

(b) an image display device attached to the frame, wherein

the image display device includes;

(A) an image forming device;

(B) a light guide device for guiding an image from the image forming device to a pupil of an observer; and

(C) a lens system for making an image from the image forming device incident on the light guide device,

the image forming device includes light emitting elements arranged in a two-dimensional matrix,

each of the light emitting elements has a laminated structure including at least one layer of a light emitting laminate including a first electrode, a second electrode, and a light emitting layer provided between the first electrode and the second electrode,

the laminated structure has a through hole which is formed in a lamination direction of the laminated structure and through which light from the light emitting layer is emitted toward the lens system, and

an antireflection layer is formed in a portion of the laminated structure facing the lens system.

8. The display device according to claim 7, wherein the antireflection layer is formed up to an edge portion of the through hole in the laminated structure.

9. The display device according to claim 7, wherein each of the light emitting elements has a laminated structure including three layers of a light emitting laminate that emits red light, a light emitting laminate that emits green light, and a light emitting laminate that emits blue light.

10. The display device according to claim 7, wherein each of the light emitting elements further includes a condenser lens for condensing light emitted from the through hole.

11. The display device according to claim 7, wherein

the image forming device further includes a circuit board on which a light emitting element driving circuit is provided, and

each of the light emitting elements is connected to the light emitting element driving circuit provided on the circuit board.

12. The display device according to claim 7, wherein the image forming device further includes a support substrate constituting the laminated structure on a light emitting side.

13. A method for manufacturing a light emitting element, the method comprising steps of:

forming a laminated structure including at least one layer of a light emitting laminate including a first electrode, a second electrode, and a light emitting layer provided between the first electrode and the second electrode;

then forming an antireflection layer on the laminated structure; and

then forming a through hole for emitting light from the light emitting layer toward an outside in the antireflection layer and the laminated structure in a lamination direction of the laminated structure.