Display unit

Patent metadata

Field	Value
Publication number	US-10998300-B2
Application number	US-201515544585-A
Country	US
Kind code	B2
Filing date	Dec 16, 2015
Priority date	Jan 29, 2015
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A display unit is provided, on a substrate, with a first wiring layer and a device section. The device section has a plurality of pixels. The device section includes, in each of the pixels, a light-emitting device section and a drive device. The light-emitting device section includes a light-emitting device and a light-emitting surface. The drive device drives the light-emitting device section and is electrically coupled to the light-emitting device section through the first wiring layer. An end of the light-emitting surface of the light-emitting device section is disposed at a position as high as an upper end of the drive device, or at a position higher than the upper end.

First claim

The invention claimed is:

1. A display unit provided, on a substrate, with a first wiring layer and a device section having a plurality of pixels, the device section comprising, in each of the pixels:
a light-emitting device section that includes a light-emitting device and a light-emitting surface; and
a drive device that drives the light-emitting device section and is electrically coupled to the light-emitting device section through the first wiring layer,
wherein the light-emitting device section is coupled to the first wiring layer through a single insulating film directly contacting a majority of a surface of the light-emitting device section closest to the first wiring layer,
wherein the first wiring layer is disposed at a position lower than the drive device, and
wherein an end of the light-emitting surface of the light-emitting device section is disposed at a position as high as an upper end of the drive device, or at a position higher than the upper end.

2. The display unit according to claim 1 , wherein the light-emitting device section is provided with a first insulating film on substrate side of the light-emitting device, wherein a total of a thickness of the first insulating film and a thickness of the light-emitting device is equal to or greater than a thickness of the drive device.

3. The display unit according to claim 1 , further comprising a second insulating film having a first recessed portion at a selective region, the second insulating film being provided between the substrate and the light-emitting device section as well as the drive device, the drive device being formed to allow a portion of the drive device to be embedded into the first recessed portion of the second insulating film.

4. The display unit according to claim 1 , further comprising a sealing layer that covers the drive device and the light-emitting device section, the light-emitting device section including a high-refractive-index layer having a refractive index that is higher than a refractive index of the sealing layer, the high-refractive-index layer covering the light-emitting device and having the light-emitting surface.

5. The display unit according to claim 4 , wherein a maximum value of an emission angle of light emitted from an end of the light-emitting surface of the high-refractive-index layer is 90 degrees.

6. The display unit according to claim 5 , wherein a refractive index and a thickness of the high-refractive-index layer satisfy the following conditional expression (A):
n 0/ n 1< L 1/( H 1 2 +L 1 2 ) 1/2   (A)

where
n 0 is a refractive index of the sealing layer,
n 1 is a refractive index of the high-refractive-index layer,
L 1 is a thickness of the high-refractive-index layer facing a side surface of the light-emitting device, and
H 1 is a thickness of the high-refractive-index layer facing the light-emitting surface of the light-emitting device.

7. The display unit according to claim 1 , wherein the light-emitting device is formed to be embedded into a portion of the drive device.

8. The display unit according to claim 7 , wherein
the drive device has a second recessed portion at a selective region, and
the light-emitting device is formed inside the second recessed portion.

9. The display unit according to claim 8 , further comprising a third insulating film that serves to adjust a height of the light-emitting surface on a bottom surface of the second recessed portion.

10. The display unit according to claim 1 , wherein the drive device has a tapered shape.

11. The display unit according to claim 10 , wherein a cross-sectional shape of the drive device is trapezoidal.

12. The display unit according to claim 1 , further comprising a light-shielding film that is formed to cover a surface of the drive device.

13. The display unit according to claim 1 , further comprising an antireflective film that is formed to cover a surface of the drive device.

14. The display unit according to claim 1 , further comprising a connection wiring line for electrical coupling between the light-emitting device and the drive device, the connection wiring line being interposed between the light-emitting device and the drive device to serve as a light-shielding layer as well.

15. The display unit according to claim 14 , wherein the connection wiring line is formed of a through-silicon via.

16. The display unit according to claim 1 , further comprising a seed layer that is superposed on the drive device and is used to form a metallic wiring line through plating, the seed layer being interposed between the light-emitting device and the drive device to serve as a light-shielding layer as well.

17. The display unit according to claim 1 , further comprising a light-shielding resin layer that is formed to be embedded between the light-emitting device and the drive device.

18. The display unit according to claim 17 , wherein the light-shielding resin layer is embedded between the pixels and between the light-emitting device and the drive device to serve as a planarizing layer as well.

19. The display unit according to claim 1 , wherein the single insulating film is disposed at a position lower than the drive device.

Assignees

• Sony Semiconductor Solutions Corp

Inventors

• Hasegawa Toshiaki
• Aoyagi Kenichi
• Araki Nobutatsu
• Jyouno Tsuyoshi
• Ootsubo Katsunori
• Hagimoto Yoshiya
• Mizuma Yasuhiro

Classifications

• H10W74/00

  Encapsulations, e.g. protective coatings · CPC title

• H10W70/655

  Fan-out layouts · CPC title

• H10W90/724

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title

• H10W90/10

  Configurations of laterally-adjacent chips · CPC title

• H10W70/6528

  of the portions that connect to chips, wafers or package parts · CPC title