Display device

Patent metadata

Field	Value
Publication number	US-11003266-B2
Application number	US-201816131323-A
Country	US
Kind code	B2
Filing date	Sep 14, 2018
Priority date	Jan 17, 2018
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A display device including: an optical image sensor; a pinhole array mask layer on the optical image sensor; a display layer disposed on the pinhole array mask layer and including a plurality of pixels; and a transparent cover layer disposed on the display layer, wherein a finger placement surface is provided on the transparent cover layer, wherein each of the pixels is one of a red pixel, a green pixel, and a blue pixel, and at least one of the green pixel and the blue pixel emits light and the red pixel does not emit light when a finger is adjacent to the finger placement surface.

First claim

What is claimed is:

1. A display device, comprising:
a controller;
an optical image sensor;
a pinhole array mask layer on the optical image sensor, wherein a distance between two pinholes of the pinhole array mask layer is about 40 μm to about 127 μm;
a display layer disposed on the pinhole array mask layer and comprising a plurality of pixels; and
a transparent cover layer disposed on the display layer, wherein a finger placement surface is provided on the transparent cover layer,
wherein each of the pixels is one of a red pixel, a green pixel, and a blue pixel,
the display layer displays an image indicating a fingerprint recognition area overlapping the optical image sensor and, in response to the sensing of a finger in the fingerprint recognition area, the controller determines a first area in which a touch is input in the fingerprint recognition area and a second area in which the touch is not input in the fingerprint recognition area, and
at least one of the green pixel and the blue pixel emits light and the red pixel does not emit light in the first area.

2. The display device of claim 1 , wherein only the red pixel that is located in the first area does not emit light.

3. The display device of claim 2 , wherein each of the green pixel, the blue pixel and the red pixel emits light in the second area.

4. The display device of claim 3 , wherein the display layer further comprises a touch sensing layer for sensing a shape of the finger in contact with the finger placement surface.

5. The display device of claim 1 , wherein a width of a pinhole of the pinhole array mask layer is about 20 μm to about 80 μm.

6. The display device of claim 1 , wherein a width of a pinhole of the pinhole array mask layer is about 65 μm or more when a distance between the pinhole array mask layer and the optical image sensor is about 3.0 mm or more and about 4.0 mm or less, the width of the pinhole is about 45 μm to about 75 μm when the distance between the pinhole array mask layer and the optical image sensor is about 2.0 mm or more and about 3.0 mm or less, the width of the pinhole is about 25 μm to about 55 μm when the distance between the pinhole array mask layer and the optical image sensor is about 1.0 mm or more and about 2.0 mm or less, and the width of the pinhole is about 25 μm to about 55 μm when the distance between the pinhole array mask layer and the optical image sensor is about 0.5 mm or more and about 1.0 mm or less.

7. A display device, comprising:
an optical image sensor;
a pinhole array mask layer disposed on the optical image sensor and comprising a plurality of pinholes;
a display layer disposed on the pinhole array mask layer and comprising a plurality of pixels; and
a transparent cover layer disposed on the display layer and having a finger placement surface,
wherein adjacent pinholes of the plurality of pinholes are spaced apart from each other by a distance of about 40 μm to about 127 μm.

8. The display device of claim 7 , wherein the adjacent pinholes are spaced apart from each other by the distance of about 40 μm to about 85 μm.

9. The display device of claim 7 , wherein the pinhole array mask layer is spaced from the optical image sensor by a distance of about 0.25 mm to about 4.0 mm.

10. The display device of claim 9 , wherein a minimum value of the distance between the adjacent pinholes is about 80 μm when the distance between the pinhole array mask layer and the optical image sensor is about 3.0 mm or more and about 4.0 mm or less, the minimum value of the distance between the adjacent pinholes is about 70 μm when the distance between the pinhole array mask layer and the optical image sensor is about 2.0 mm or more and about 3.0 mm or less, the minimum value of the distance between the adjacent pinholes is about 55 μm when the distance between the pinhole array mask layer and the optical image sensor is about 1.0 mm or more and about 2.0 mm or less, the minimum value of the distance between the adjacent pinholes is about 45 μm when the distance between the pinhole array mask layer and the optical image sensor is about 0.5 mm or more and about 1.0 mm or less, and the minimum value of the distance between the adjacent pinholes is about 40 μm when the distance between the pinhole array mask layer and the optical image sensor is about 0.25 mm or more and about 0.5 mm or less.

11. The display device of claim 9 , wherein the pinhole array mask layer is spaced apart from the optical image sensor by about 1 mm or less.

12. The display device of claim 9 , wherein a width of a first pinhole of the plurality of pinholes is about 20 μm to about 80 μm.

13. The display device of claim 12 , wherein the width of the first pinhole is about 65 μm or more when the distance between the pinhole array mask layer and the optical image sensor is about 3.0 mm or more and about 4.0 mm or less, the width of the first pinhole is about 45 μm to about 75 μm when the distance between the pinhole array mask layer and the optical image sensor is about 2.0 mm or more and about 3.0 mm or less, the width of the first pinhole is about 25 μm to about 55 μm when the distance between the pinhole array mask layer and the optical image sensor is about 1.0 mm or more and about 2.0 mm or less, and the width of the first pinhole is about 25 μm to about 55 μm when the distance between the pinhole array mask layer and the optical image sensor is about 0.5 mm or more and about 1.0 mm or less.

14. The display device of claim 7 , wherein a ratio of a thickness of the pinhole array mask layer to a width of a first pinhole of the plurality of pinholes is about 5 to about 20.

15. A display device, comprising:
an optical image sensor;
a pinhole array mask layer on the optical image sensor;
a display layer disposed on the pinhole array mask layer and comprising a plurality of pixels;
a transparent cover layer disposed on the display layer and having a finger placement surface; and
an anti-reflection layer between the display layer and the pinhole array mask layer,
wherein the pinhole array mask layer and the optical image sensor are spaced apart from each other by 0.25 mm to 4.0 mm.

16. The display device of claim 15 , wherein the anti-reflection layer comprises a polarizing layer.

17. The display device of claim 16 , wherein the anti-reflection layer comprises a retardation layer.

18. The display device of claim 17 , wherein the retardation layer is a quarter retardation layer.

19. The display device of claim 15 , wherein the anti-reflection layer comprises a matte film.

20. The display device of claim 15 , wherein the anti-reflection layer comprises a matte-treated surface of the display layer.

21. The display device of claim 15 , wherein the anti-reflection layer comprises a matte-treated surface of the pinhole array mask layer.

22. The display device of claim 15 , wherein an inner circumferential surface of a pinhole of the pinhole array mask layer is matte-treated.

23. The display device of claim 15 , wherein the optical image sensor further comprises a filter for blocking red light.

24. The display device of claim 23 , wherein the filter is a color filter that transmits green or blue light.

25. The display device of claim 15 , wherein the optical image sensor further comprises a filter for blocking infrared rays.

26. A display device, comprising:
an optical image sensor comprising a plurality of sensing elements havin

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Sunghwan
• Ko Gwangbum
• Kim Gayoung
• Kim Doik
• Kim Junghak
• Jung Yeonsung

Classifications

• G06V40/12 Primary

  Fingerprints or palmprints · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06V10/145

  Illumination specially adapted for pattern recognition, e.g. using gratings · CPC title

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10F39/12

  Image sensors · CPC title