DISPLAY DEVICE, AND ELECTRONIC APPARATUS

• US 20200135820A1
• Filed: 06/27/2018
• Published: 04/30/2020
• Est. Priority Date: 07/14/2017
• Status: Active Grant

• Current Assignee: Sony Semiconductor Solutions Corporation (Sony Group Corp.)
• Original Assignee: Sony Semiconductor Solutions Corporation (Sony Group Corp.)
• Inventors: OHCHI, Tomokazu
• Granted Patent: US 11,367,763 B2
• Time in Patent Office: Days
• CPC Class Codes: G09F 9/30 in which the desired character or characters are formed by combining individual elements panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00
• CPC Class Codes: H05B 33/12 Light sources with substantially two-dimensional radiating surfaces
• CPC Class Codes: H05B 33/22 characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• 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 59/878 comprising reflective means

Abstract

In a display device, light emitting units each formed by stacking a first electrode, an organic layer, and a second electrode are formed and arranged in a two-dimensional matrix on a substrate, the first electrode is provided for each light emitting unit, partition walls are formed between adjacent ones of the first electrodes, the organic layer and the second electrode are stacked on the entire surface including a part over the first electrodes and a part over the partition walls, a filling layer filling recesses between the partition walls is formed on the second electrode, the partition walls include stacks each including at least two layers including a lower layer portion on the light emitting unit side and an upper layer portion located above the lower layer portion, and at least part of light entering from the light emitting units is totally reflected on surfaces of the upper layer portions of the partition walls.

Claims

1. A display device comprising

light emitting units each formed by stacking a first electrode, an organic layer, and a second electrode, the light emitting units being formed and arranged in a two-dimensional matrix on a substrate, wherein

the first electrode is provided for each light emitting unit,

partition walls are formed between adjacent ones of the first electrodes,

the organic layer and the second electrode are stacked on an entire surface including a part over the first electrodes and a part over the partition walls,

a filling layer filling recesses between the partition walls is formed on the second electrode,

the partition walls include stacks each including at least two layers including a lower layer portion on a light emitting unit side and an upper layer portion located above the lower layer portion, and

at least part of light entering from the light emitting units is totally reflected on surfaces of the upper layer portions of the partition walls.

2. The display device according to claim 1, wherein

the lower layer portions of the partition walls are disposed in regions in which light emitted from a position at a farthest distance from the partition walls in light emitted from the light emitting units is not totally reflected when all of the partition walls include a material forming the upper layer portions.

3. The display device according to claim 1, wherein

the upper layer portions of the partition walls include an inorganic oxide.

4. The display device according to claim 3, wherein

the upper layer portions of the partition walls include silicon oxide.

5. The display device according to claim 1, wherein

the lower layer portions of the partition walls include an inorganic nitride.

6. The display device according to claim 5, wherein

the lower layer portions of the partition walls include silicon nitride.

7. The display device according to claim 1, wherein

the lower layer portions of the partition walls include an inorganic oxynitride.

8. The display device according to claim 7, wherein

the lower layer portions of the partition walls include silicon oxynitride.

9. The display device according to claim 1, wherein

the lower layer portions of the partition walls include a resin material.

10. The display device according to claim 9, wherein

the lower layer portions of the partition walls include polyimide resin or acrylic resin.

11. The display device according to claim 1, further comprising

color filters disposed above the light emitting units.

12. The display device according to claim 1, wherein

the upper layer portions of the partition walls each include a first upper layer portion on a lower layer portion side and a second upper layer portion above the first upper layer portion, and

the second upper layer portion includes a same material as a material forming the lower layer portions.

13. The display device according to claim 12, wherein

the first upper layer portions each include a layer including the same material as the material forming the lower layer portion in the layer.

14. An electronic apparatus comprising a display device, wherein

the display device includes

light emitting units each formed by stacking a first electrode, an organic layer, and a second electrode, the light emitting units being formed and arranged in a two-dimensional matrix on a substrate,

partition walls are formed between adjacent ones of the light emitting units,

a protective layer fills a space between the partition walls,

the partition walls include stacks each including at least two layers including a lower layer portion on a light emitting unit side and an upper layer portion located above the lower layer portion, and the lower layer portion includes a material having a higher refractive index than a material forming the upper layer portion, and

at least part of light from the light emitting units is totally reflected on surfaces of the upper layer portions of the partition walls.