DISPLAY UNIT

• US 20150295017A1
• Filed: 06/24/2015
• Published: 10/15/2015
• Est. Priority Date: 09/19/2003
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kashiwabara, Mitsuhiro, Yamada, Jiro, Yokoyama, Seiichi, Hanawa, Kohji
• Granted Patent: US 9,373,672 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 27/153 in a repetitive configuration, e.g. LED bars
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/813 characterised by their shape
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/30 Devices specially adapted for multicolour light emission
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/805 Electrodes
• CPC Class Codes: H10K 59/80518 : Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 59/80522 : combined with auxiliary electrodes
• CPC Class Codes: H10K 59/80524 : Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/876 : comprising a resonant cavity structure, e.g. Bragg reflector pair

Abstract

A display unit includes a plurality of light emitting devices, each of the light emitting devices including a function layer including at least an organic layer is sandwiched between a first electrode and a second electrode, and which have a resonator structure for resonating light by using a space between the first electrode and the second electrode as a resonant section and extracting the light through the second electrode are arranged on a substrate, wherein in the respective light emitting devices, the organic layer is made of an identical layer, and a distance of the resonant section between the first electrode and the second electrode is set to a plurality of different values.

Claims

1. A display unit comprising:

a substrate;

a plurality of thin film transistors arranged on the substrate; and

a plurality of organic light emitting devices arranged on the plurality of thin film transistors,

wherein,

the organic light emitting devices comprises;

a first metal layer;

a second metal layer;

a first light emitting layer disposed between the first metal layer and the second metal layer in a first light emission region;

a second light emitting layer disposed between the first metal layer and the second metal layer in a second light emission region; and

a third light emitting layer disposed between the first metal layer and the second metal layer in a third light emission region,

in the first light emission region, the second metal layer is arranged at a first distance from the first metal layer,

in the second light emission region, the second metal layer is arranged at a second distance from the first metal layer,

in the third light emission region, the second metal layer is arranged at a third distance from the first metal layer,

the first distance is larger than the second distance,

the second distance is larger than the third distance, and

the second metal layer includes silver (Ag) and ytterbium (Yb).

2. The display unit according to claim 1, wherein light generated in the first, second, and third light emitting layers is extracted through the second metal layer.

3. The display unit according to claim 1, wherein a thickness of the second metal layer is between about 1-50 nm.

4. The display unit according to claim 1, wherein the display unit is a bottom emission type display.

5. The display unit according to claim 1,

wherein the first light emission region is configured to emit red light,

wherein the second light emission region is configured to emit green light, and

wherein the third light emission region is configured to emit blue light.

6. The display unit according to claim 1, further comprising an insulating film separating the first, second, and third light emission regions.

7. The display unit according to claim 1, wherein the first metal layer is a mirror layer, and wherein the second metal layer is a half mirror layer.

8. The display unit according to claim 7, wherein the organic light emitting devices have a resonator structure for resonating light emitted in the light emitting layer by using a space between the mirror and the half mirror as a resonant section.

9. The display unit according to claim 1, further comprising a hollow sealing cap.

10. The display unit according to claim 1, further comprising a protective layer arranged on the organic light emitting devices, an adhesive layer arranged on the protective layer, and a sealing panel arranged on the adhesive layer.

11. The display unit according to claim 1, further comprising a planarizing layer disposed between the plurality of organic light emitting devices and the plurality of thin film transistors.

12. The display unit according to claim 11, further comprising a wiring connected to the plurality of organic light emitting devices and arranged on the planarizing layer.

13. A display unit comprising:

a substrate;

a plurality of thin film transistors arranged on the substrate;

a planarizing layer arranged on the plurality of thin film transistors;

a plurality of organic light emitting devices arranged on the plurality of thin film transistors; and

a protective layer arranged on the organic light emitting devices,

wherein,

the organic light emitting devices comprises;

a first metal layer;

a second metal layer;

a first light emitting layer disposed between the first metal layer and the second metal layer in a first light emission region;

a second light emitting layer disposed between the first metal layer and the second metal layer in a second light emission region; and

a third light emitting layer disposed between the first metal layer and the second metal layer in a third light emission region,

in the first light emission region, the second metal layer is arranged at a first distance from the first metal layer,

in the second light emission region, the second metal layer is arranged at a second distance from the first metal layer,

in the third light emission region, the second metal layer is arranged at a third distance from the first metal layer,

light generated in the first, second, and third light emitting layers is extracted through the second metal layer,

the first distance is larger than the second distance,

the second distance is larger than the third distance, and

the second metal layer includes silver (Ag) and ytterbium (Yb).

14. A display unit comprising:

a substrate;

a plurality of thin film transistors arranged on the substrate;

a plurality of organic light emitting devices arranged on the plurality of thin film transistors; and

a protective layer arranged on the organic light emitting devices,

wherein,

at least one of the organic light emitting devices comprises;

a first metal;

a second metal; and

a light emitting layer disposed between the first metal and the second metal in a light emission region,

in the light emission region, the second metal is arranged at a distance from the first metal,

light generated in the light emitting layers is extracted through the second metal, and

the second metal includes silver (Ag) and ytterbium (Yb).

15. The display unit according to claim 14, wherein a thickness of the second metal is between about 1-50 nm.

16. The display unit according to claim 14, wherein the display unit is a bottom emission type display.

17. The display unit according to claim 14, wherein the first metal is a mirror, and wherein the second metal layer is a half mirror.

18. The display unit according to claim 17, wherein the organic light emitting devices have a resonator structure for resonating light emitted in the light emitting layer by using a space between the mirror and the half mirror as a resonant section.

19. The display unit according to claim 14, further comprising a hollow sealing cap.

20. The display unit according to claim 14, further comprising a protective layer arranged on the organic light emitting devices, an adhesive layer arranged on the protective layer, and a sealing panel arranged on the adhesive layer.

21. The display unit according to claim 14, further comprising a planarizing layer disposed between the plurality of organic light emitting devices and the plurality of thin film transistors.

22. The display unit according to claim 21, further comprising a wiring connected to the plurality of organic light emitting devices and arranged on the planarizing layer.