Optical device, display device, and method for manufacturing light emitting element

• US 10,451,880 B2
• Filed: 08/30/2016
• Issued: 10/22/2019
• Est. Priority Date: 10/28/2015
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Aiki, Kazuma
• Primary Examiner(s): Kim, Ellen E
• Application Number:
  US15/768,247
• Publication Number:
  US 20180329212A1
• Time in Patent Office: 1,148 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 that includes a plurality of light emitting elements in a two-dimensional matrix, wherein

each light emitting element of the plurality of light emitting elements includes a laminated structure,

the laminated structure includes a through hole and at least one layer of a light emitting laminate, and

the light emitting laminate includes a first electrode, a second electrode, and a light emitting layer between the first electrode and the second electrode; and

a lens system configured to project an image from the image forming device on an outside of the optical device, wherein

the light emitting layer is configured to emit light toward the lens system via the through hole,

the lens system is further configured to reflect the light,

each light emitting element of the plurality of light emitting elements further includes;

an antireflection layer in a portion of the laminated structure, and

a condenser lens on the antireflection layer, and

the antireflection layer faces the lens system such that the light reflected by the lens system is not reflected by the image forming device.

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

3. The optical device according to claim 1, wherein the at least one layer of the light emitting laminate includes one of:

a first light emitting laminate configured to emit red light,

a second light emitting laminate configured to emit green light, or

a third light emitting laminate configured to emit blue light.

4. The optical device according to claim 1, wherein the condenser lens is configured to condense the light emitted via the through hole.

5. The optical device according to claim 1, wherein

the image forming device further includes a circuit board,

the optical device further includes a light emitting element driving circuit on the circuit board, and

each light emitting element of the plurality of light emitting elements is connected to the light emitting element driving circuit.

6. The optical device according to claim 1, wherein

the image forming device further includes a support substrate constituting the laminated structure, and

the support substrate is on a light emitting side of the laminated structure.

14. The optical device according to claim 6, wherein the antireflection layer is on the support substrate.

7. A display device, comprising:

a frame mounted on a head of an observer; and

an image display device attached to the frame, wherein the image display device includes;

an image forming device that includes a plurality of light emitting elements in a two-dimensional matrix, wherein

each light emitting element of the plurality of light emitting elements includes a laminated structure,

the laminated structure includes a through hole and at least one layer of a light emitting laminate, and

the light emitting laminate includes a first electrode, a second electrode, and a light emitting layer between the first electrode and the second electrode;

a light guide device configured to guide an image from the image forming device to a pupil of the observer; and

a lens system configured to incident the image from the image forming device on the light guide device, wherein

the light emitting layer is configured to emit light toward the lens system via the through hole,

the lens system is further configured to reflect the light,

each light emitting element of the plurality of light emitting elements further includes;

an antireflection layer in a portion of the laminated structure, and

a condenser lens on the antireflection layer, and

the antireflection layer faces the lens system such that the light reflected by the lens system is not reflected by the image forming device.

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

9. The display device according to claim 7, wherein the at least one layer of the light emitting laminate includes one of:

a first light emitting laminate configured to emit red light,

a second light emitting laminate configured to emit green light, or

a third light emitting laminate configured to emit blue light.

10. The display device according to claim 7, wherein the condenser lens is configured to condense the light emitted via the through hole.

11. The display device according to claim 7, wherein

the image forming device further includes a circuit board,

the image display device further includes a light emitting element driving circuit on the circuit board, and

each light emitting element of the plurality of light emitting elements is connected to the light emitting element driving circuit.

12. The display device according to claim 7, wherein

the image forming device further includes a support substrate constituting the laminated structure, and

the support substrate is on a light emitting side of the laminated structure.

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

forming a laminated structure including at least one layer of a light emitting laminate,

wherein the light emitting laminate includes a first electrode, a second electrode, and a light emitting layer between the first electrode and the second electrode;

forming an antireflection layer on the laminated structure; and

forming a through hole in the laminated structure, wherein

the light emitting layer emits light towards a lens system via the through hole,

the lens system reflects the light,

the light reflected by the lens system is not reflected by the light emitting element due to the antireflection layer, and

the light emitting element includes a condenser lens on the antireflection layer.