Display unit and electronic apparatus having insulating layers stacked with different refractive indices

Patent metadata

Field	Value
Publication number	US-9287333-B2
Application number	US-201414192950-A
Country	US
Kind code	B2
Filing date	Feb 28, 2014
Priority date	Apr 11, 2013
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A display unit includes a pixel including a plurality of sub-pixels. The sub-pixels each include a plurality of light emission regions that are arranged away from one another. Each of the sub-pixels includes a single first electrode, a single second electrode provided in a lamination direction of the first electrode, and a light-emitting layer inserted between the first electrode and the second electrode in each of the light emission regions.

First claim

What is claimed is:

1. A display unit, comprising a pixel including a plurality of sub-pixels, the sub-pixels each including a plurality of light emission regions that are arranged away from one another,
each of the sub-pixels including
a single first electrode,
a single second electrode, the first electrode and the second electrode being arranged in a lamination direction,
a light-emitting layer inserted between the first electrode and the second electrode in each of the light emission regions, and
a first insulating layer on the first electrode,

wherein the first insulating layer includes a plurality of windows in both a first direction and a second direction, respectively corresponding to the plurality of light emission regions.

2. The display unit according to claim 1 , wherein
the first electrode, the light-emitting layer, and the second electrode are arranged in the lamination direction in order at least at bottom of each of the windows.

3. The display unit according to claim 2 , wherein
each of the sub-pixels includes a second insulating layer that is formed to cover a whole region of the sub-pixel and that has a refractive index different from a refractive index of the first insulating layer, and
following Expressions (1) and (2) are satisfied,
1.1≦ n 1≦1.8  (1)

n 1− n 2≧0.20  (2)

where n1 is the refractive index of the second insulating layer, and
n2 is the refractive index of the first insulating layer.

4. The display unit according to claim 2 , wherein a respective window of the first insulating layer has a truncated conical shape, and
following Expressions (3) and (4) are satisfied,
0.5≦ R 1/ R 2≦0.8  (3)

0.5≦ H/R 1≦2.0  (4)

where H is a height of the first insulating layer, R1 is a window diameter at the bottom of the window, and R2 is a window diameter at a top end of the first insulating layer.

5. The display unit according to claim 1 , wherein each of the light emission regions has one of a circular shape and an elliptical shape.

6. The display unit according to claim 5 , wherein each of the sub-pixels includes two of the light emission regions having elliptical shapes that have major axis directions different from each other.

7. The display unit according to claim 5 , wherein
each of the sub-pixels includes three or more of the light emission regions, and
all or a part of the light emission regions belonging to one pixel are arranged to allow three light emission regions out of the all or the part of the light emission regions to be adjacent to one another.

8. The display unit according to claim 7 , wherein the first electrode has a hexagonal shape.

9. The display unit according to claim 8 , wherein
a pair of facing sides out of six sides of the first electrode have lengths that are equal to each other,
four sides other than the pair of sides have lengths that are equal to one another, and
the lengths of the pair of sides are longer than the lengths of the other four sides.

10. The display unit according to claim 9 , further comprising a signal line extending in a third direction, wherein
the pair of sides extend in a fourth direction intersecting with the third direction.

11. The display unit according to claim 8 , wherein
the pixel includes four of the sub-pixels, and
four of the first electrodes, each respectively in one of the four sub-pixels, that are arranged to allow three of the first electrodes out of the four first electrodes to be adjacent to one another.

12. The display unit according to claim 7 , wherein
all of the light emission regions belonging to one sub-pixel are arranged to allow three light emission regions out of all of the light emission regions to be adjacent to one another, and
the first electrode has a polygonal shape corresponding to an arrangement of the light emission regions in the one sub-pixel.

13. The display unit according to claim 12 , wherein the pixel has three or four of the sub-pixels.

14. The display unit according to claim 1 , wherein the plurality of light emission regions each have a quadrilateral shape.

15. The display unit according to claim 14 , wherein
the light emission region has a rectangular shape, and
each of the sub-pixels includes two light emission regions that have long-side directions different from each other.

16. The display unit according to claim 14 , comprising a plurality of the pixels, wherein
the light emission region has a rectangular shape, and
the light emission region in one of the pixels has a long-side direction that is different from a long-side direction of the light emission region in another pixel adjacent to the one of the pixels.

17. The display unit according to claim 1 , further comprising:
a plurality of the pixels; and
a signal line extending in a third direction, wherein
each of the sub-pixels further includes a pixel circuit that is formed in a pixel circuit region, and
the pixel circuit regions are provided side by side in the third direction and a fourth direction intersecting with the third direction.

18. The display unit according to claim 1 , wherein the second electrodes in the sub-pixels are connected with one another.

19. An electronic apparatus provided with a display unit and a control section configured to control operation of the display unit, the display unit comprising a pixel including a plurality of sub-pixels, the sub-pixels each including a plurality of light emission regions that are arranged away from one another,
each of the sub-pixels including
a single first electrode,
a single second electrode, the first electrode and the second electrode being arranged in a lamination direction,
a light-emitting layer inserted between the first electrode and the second electrode in each of the light emission regions, and
a first insulating layer on the first electrode,

wherein the first insulating layer includes a plurality of windows in both a first direction and a second direction, respectively corresponding to the plurality of light emission regions.

Assignees

• Sony Corp

Inventors

• Jinta Seiichiro
• Yamada Jiro

Classifications

• H10K59/353 Primary

  characterised by the geometrical arrangement of the RGB subpixels · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/351 Primary

  comprising more than three subpixels, e.g. red-green-blue-white [RGBW] · CPC title

• H01L27/3218 Primary

  Electricity · mapped topic

• H01L27/3213

  Electricity · mapped topic