Display device and operating method therefor

Patent metadata

Field	Value
Publication number	US-12175928-B2
Application number	US-202218146686-A
Country	US
Kind code	B2
Filing date	Dec 27, 2022
Priority date	Jul 14, 2020
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

A display device including a display that includes a plurality of pixels, wherein the plurality of pixels respectively include a plurality of sub-pixels is provided. The plurality of sub-pixels include first type sub-pixels observed at a first viewing angle, and second type sub-pixels observed at a second viewing angle that is narrower than the first viewing angle.

First claim

What is claimed is:

1. A display device including an organic light emitting display (OLED) panel, the display device comprising:
a pixel layer, in which OLED pixels corresponding to a plurality of pixels are disposed; and
an encapsulation layer configured to encapsulate the pixel layer with no air gap,
wherein the plurality of pixels includes sub pixels of three colors of red (R), green (G), and blue (B),
wherein the pixel layer includes a first pixel group and a second pixel group having a viewing angle that is smaller than a viewing angle of the first pixel group,
wherein a shield member disposed on at least one surface of the encapsulation layer forms a plurality of openings,
wherein at least one sub pixel included in the second pixel group is divided by at least two of the plurality of openings,
wherein the pixels of the first pixel group and the second pixel group are driven in a general mode, and
wherein the pixels of the second pixel group are driven in a narrow viewing angle mode whereby a screen is displayed at a narrow viewing angle that is narrower than that in the general mode.

2. The display device of claim 1 , wherein the plurality of openings of the shield member has substantially the same width.

3. The display device of claim 1 , wherein partial areas of the sub pixels of the second pixel group, which are covered by the shield member between two or more openings include an area, in which at least two of the sub pixels do not emit light due to disposition of a pixel definition member.

4. The display device of claim 3 ,
wherein the pixel definition member is aligned with the shield member, and
wherein a width of the pixel definition member is formed to be larger than a width of the shield member between the two or more openings whereby at least two of the sub pixels that do not emit light are included in the plurality of openings.

5. The display device of claim 4 , further comprising:
at least one processor related to driving of the pixel layer,
wherein the at least one processor is configured to control such that the pixels of the first pixel group is turned off or is displayed with a color of a specific gradation value in the narrow viewing angle mode.

6. The display device of claim 5 , wherein the processor is further configured to:
control to adjust the specific gradation value according to adjustment of brightness, or
set a shadow rate of the first pixel group in the narrow viewing angle mode to a shadow rate of the first pixel group in the general mode.

7. A display device comprising:
a display including a plurality of first type pixels and a plurality of second type pixels,
wherein each of the first type pixels includes a plurality of first type sub pixels observable at a first viewing angle,
wherein each of the second type pixels includes a plurality of second type sub pixels observable at a second viewing angle that is narrower than the first viewing angle,
wherein an area of the first type pixel and an area of the second type pixel are alternately disposed,
wherein the first type sub pixels include:
first pixel definition members surrounding at least portions of peripheries of the first type sub pixels, and

wherein the second type sub pixels include:
second pixel definition members dividing areas of the second type sub pixels into a plurality of light emitting areas.

8. The display device of claim 7 , further comprising:
an encapsulation layer covering the plurality of light emitting areas; and
a light transmission protecting layer covering at least a portion of the encapsulation layer,
wherein a shield member is disposed between the encapsulation layer and the light transmission protecting layer, and
wherein the shield member includes:
a first shield member arranged in correspondence to the first pixel definition members of the first type sub pixels,
a second shield member arranged in correspondence to peripheries of the second type sub pixels, and
a third shield member arranged in correspondence to the second pixel definition members.

9. The display device of claim 8 ,
wherein a plurality of openings is formed by the second shield member and the third shield member.

10. The display device of claim 9 ,
wherein, among the light emitting areas observed through the plurality of openings, sizes of blue light emitting areas are larger than sizes of red light emitting areas,
wherein the sizes of the red light emitting areas are larger than sizes of green light emitting areas, and
wherein a sum of sizes of the light emitting areas observed through the plurality of openings is the same as or similar to sizes of light emitting areas for colors of the first type sub pixels.

11. The display device of claim 9 ,
wherein sizes of the second pixel definition members observed through the plurality of openings are different sizes for colors, and
wherein the sizes of the second pixel definition members observed through the openings corresponding to green light emitting areas from among the plurality of openings are larger than the sizes of the second pixel definition members observed through the openings corresponding to red light emitting areas from among the plurality of openings.

12. The display device of claim 7 ,
wherein the light emitting areas for colors are driven by one anode electrode, and
wherein the anode electrode includes an opening formed at least a partial area overlapping a signal line in an upward/downward direction.

13. The display device of claim 8 , further comprising:
a third type sub pixel having an observation viewing angle that is narrower than that of the first type sub pixels and is wider than that of the second type sub pixels,
wherein a width of the shield member disposed around the third type sub pixels is smaller than a width of the shield member disposed around the second type sub pixels.

14. The display device of claim 7 ,
wherein a sum of sizes of the light emitting areas of the second type sub pixels for colors is larger than the sizes of the first type sub pixels for colors, and
wherein a number of the light emitting areas included in the second type sub pixels is two or four.

15. The display device of claim 7 , further comprising at least one processor configured to drive the display device in one of a general mode and a narrow viewing angle mode.

16. The display device of claim 7 , wherein at least two of the first type sub pixels have different sizes.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Wu Yilin
• Shin Sungyoung
• Uhm Minsuk
• Choi Sungdae
• Choi Seungyeop
• Shin Hyunchang
• Yang Byungduk

Classifications

• H10K59/353

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

• G09F9/335

  being organic light emitting diodes [OLED] · CPC title

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G2320/0271

  Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping · CPC title

• G09G2320/028

  by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction · CPC title