Display device

Patent metadata

Field	Value
Publication number	US-2021036060-A1
Application number	US-202016829649-A
Country	US
Kind code	A1
Filing date	Mar 25, 2020
Priority date	Jul 30, 2019
Publication date	Feb 4, 2021
Grant date	—

Abstract

A display device includes a display substrate, a light emitting element layer disposed on a surface of the display substrate and including display pixels, a sensing substrate having a surface attached to another surface of the display substrate, a sensing element layer disposed on another surface of the sensing substrate and including sending pixels that each sense light of a color, and a photorefractive layer disposed on the sensing element layer and including micro lenses.

First claim

What is claimed is:

1 . A display device comprising:
a display substrate; a light emitting element layer disposed on a surface of the display substrate and including display pixels; a sensing substrate having a surface attached to another surface of the display substrate; a sensing element layer disposed on another surface of the sensing substrate and including sensing pixels that each sense light of a color; and a photorefractive layer disposed on the sensing element layer and including micro lenses.

2 . The display device of claim 1 , further comprising:
a color conversion element layer disposed on the light emitting element layer, wherein the color conversion element layer includes:
a wavelength conversion pattern including a quantum dot; and
a color filter.

3 . The display device of claim 1 , wherein
the display substrate and the sensing substrate are flexible.

4 . The display device of claim 3 , further comprising:
a first encapsulation layer disposed on the light emitting element layer; and a second encapsulation layer disposed between the sensing element layer and the photorefractive layer, wherein each of the first encapsulation layer and the second encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer.

5 . The display device of claim 1 , wherein
at least one of the display substrate and the sensing substrate is an opaque substrate.

6 . The display device of claim 1 , wherein
the display pixels include an organic light emitting diode, and the sensing pixels include a photo diode.

7 . The display device of claim 6 , wherein
the organic light emitting diode of the display pixels emits blue light.

8 . The display device of claim 6 , wherein
the organic light emitting diode and the photo diode are formed in a same process.

9 . The display device of claim 1 , further comprising:
a controller that controls the display pixels and the sensing pixels.

10 . The display device of claim 9 , wherein the controller includes:
an image processor that performs color processing on image data decoded from the sensing pixels and performs at least one of an image conversion and an image quality improvement.

11 . The display device of claim 1 , wherein the sensing pixels include:
a first photoelectric conversion element that senses red light; a second photoelectric conversion element that senses green light; and a third photoelectric conversion element that senses blue light.

12 . The display device of claim 11 , wherein
the first photoelectric conversion element includes phthalocyanine, the second photoelectric conversion element includes boron subphthalocyanine chloride or N, N-dimethyl quinacridone, and the third photoelectric conversion element includes triarylamines or oxadiazole-containing oligoaryls.

13 . The display device of claim 1 , wherein
at least one of the micro lenses of the photorefractive layer overlaps at least one of the photoelectric conversion elements of the sensing pixels.

14 . The display device of claim 1 , further comprising:
a color conversion filter disposed between the sensing element layer and the photorefractive layer.

15 . The display device of claim 14 , wherein
the sensing pixels absorb light of one color.

16 . The display device of claim 15 , wherein the color conversion filter includes:
a first color filter that selectively transmits light of a first color; a second color filter that selectively transmits light of a second color; and a third color filter that selectively transmits light of a third color.

17 . The display device of claim 1 , wherein
the micro lenses are manufactured by a photoresist method, a hot molding method, or a printing method.

18 . The display device of claim 1 , wherein
each of the sensing pixels includes a light sensing element of an organic CMOS image sensor.

19 . A display device comprising:
a display surface formed on a surface of the display device and including a plurality of color areas defined by display pixels; and a sensing surface formed on another side of the display device and including a plurality of absorption areas defined by sensing pixels, wherein each of the display pixels includes a light emitting element, each of the sensing pixels includes a photoelectric conversion element, and a number of the display pixels is equal to a number of the sensing pixels.

20 . The display device of claim 19 , wherein
the display pixels match one-to-one with the sensing pixels, and an image color collected by one of the sensing pixels emits light through a corresponding one of the display pixels.

21 . The display device of claim 19 , wherein
the display surface includes:
a display area; and
a non-display area surrounding the display area, and
the display area includes:
a light emitting area including the plurality of color areas; and
a non-light emitting area distinguishing the plurality of color areas.

22 . The display device of claim 21 , wherein
the display device does not include in the display area a physical opening passing through the display device.

23 . The display device of claim 19 , wherein
an area of the sensing surface is less than an area of the display surface.

24 . The display device of claim 19 , wherein the plurality of color areas includes:
a first color area that selectively emits light of a first color; a second color area that selectively emits light of a second color; and a third color area, that selectively emits light of a third color.

25 . The display device of claim 24 , wherein the first color area, the second color area, and the third color area have different sizes with each other.

26 . The display device of claim 19 , wherein
sizes of the plurality of absorption areas are substantially same each other and are less than or equal to sizes of the plurality of color areas.

27 . A display device comprising:
a base substrate; a light emitting element layer disposed on a surface of the base substrate; a color conversion element layer disposed on the light emitting element layer; a sensing element layer disposed on another surface of the base substrate and including sensing pixels that each sense light of a color; and a photorefractive layer disposed on the sensing element layer and including micro lenses.

Assignees

• Samsung Display Co Ltd

Inventors

• Cho Hyeon Gu
• Choi Min Soo
• Yoon Seok Gyu
• Lyu Jae Jin

Classifications

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title