Display device comprising prism sheet between a window member and a proximity sensor

Patent metadata

Field	Value
Publication number	US-10409337-B2
Application number	US-201715442504-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Mar 9, 2016
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A display device includes a display panel configured to display an image, a window member covering the display panel and having a sensing area provided with a first opening and a second opening, a proximity sensor which overlaps with the sensing area and is configured to provide a first light to the window member through the first opening and receive through the second opening, a portion of a second light defined as a reflected light of the first light, and an optical member including a prism sheet disposed between the window member and the proximity sensor. A first angle between the first light incident from the proximity sensor to the prism sheet and a normal line of the window member is greater than a second angle between the first light which passes through the prism sheet and the normal line of the window member.

First claim

What is claimed is:

1. A display device comprising:
a display panel configured to display an image;
a window member covering the display panel and having a first opening and a second opening in a sensing area which is defined on a plane;
a proximity sensor which is disposed on the window member so as to overlap with the sensing area, configured to provide a first light to the window member through the first opening and receive a portion of a second light through the second opening, the second light being defined as a reflected light of the first light; and
an optical member comprising a prism sheet disposed between the window member and the proximity sensor,
wherein a first angle between the first light incident from the proximity sensor to the prism sheet and a normal line of the window member, the normal line being perpendicular to the window member, is greater than a second angle between the first light which passes through the prism sheet and the normal line of the window member.

2. The display device of claim 1 , wherein the window member comprises:
a base substrate having defined therein a display area which is configured to transmit the image and a non-display area which is adjacent to at least a portion of the display area and includes the sensing area;
a first printed layer disposed on the base substrate so as to overlap with the non-display area; and
a second printed layer disposed on the first printed layer so as to overlap with at least a portion of the first printed layer,
wherein the first opening and the second opening are defined in the first printed layer and the second printed layer.

3. The display device of claim 2 , wherein the proximity sensor comprises:
a light-emitting part overlapping with the first opening and configured to generate the first light; and
a light-receiving part overlapping with the second opening and configured to receive the portion of the second light.

4. The display device of claim 3 , wherein the optical member further comprises a light-transmitting layer disposed between the base substrate and the prism sheet, and overlapping with the first opening and the second opening.

5. The display device of claim 4 , wherein the transmittance of the light-transmitting layer with respect to light in the wavelength range of infrared radiation is higher than the transmittance of the light-transmitting layer with respect to light in the wavelength range of visible light.

6. The display device of claim 4 , wherein:
the planar width of the light-transmitting layer is greater than the planar width of the first opening; and
the light-transmitting layer is disposed so as to cover at least a portion of the first and the second printed layers.

7. The display device of claim 6 , wherein the prism sheet is disposed so as to overlap with the first opening and the second opening.

8. The display device of claim 6 , wherein the optical member further comprises a first adhesive layer which is disposed between the light-transmitting layer and the prism sheet, and attaches the light-transmitting layer with the prism sheet.

9. The display device of claim 6 , wherein a portion of the light-transmitting layer makes contact with the base substrate.

10. The display device of claim 6 , wherein the optical member further comprises a second adhesive layer which is disposed between the prism sheet and the proximity sensor, and attaches the prism sheet with the proximity sensor.

11. The display device of claim 6 , wherein the optical member further comprises a third adhesive layer which is disposed between the light-transmitting layer and the base substrate, and attaches the light-transmitting layer with the base substrate.

12. The display device of claim 6 , wherein the prism sheet comprises:
a first prism layer comprising first prisms arranged in a first direction; and
a second prism layer comprising second prisms arranged in a second direction intersecting the first direction.

13. The display device of claim 3 , wherein the proximity sensor further comprises:
a first bracket which accommodates the light-emitting part; and
a second bracket which accommodates the light-receiving part,
wherein a first hole corresponding to the first opening is defined at the first bracket and a second hole corresponding to the second opening is defined at the second bracket.

14. The display device of claim 2 , wherein the transmittance of the prism sheet with respect to light in the wavelength range of infrared radiation is greater than the transmittance of the prism sheet with respect to light in the wavelength range of visible light.

15. The display device of claim 2 , wherein the first printed layer has a white color.

16. The display device of claim 2 , wherein the second printed layer has a black color.

17. The display device of claim 1 , wherein the first light and the second light have a wavelength range in the wavelength range of infrared radiation.

18. A display device comprising:
a base substrate;
a first printed layer which is disposed on the base substrate, is provided with a first opening and a second opening, and is configured to reflect external light;
a proximity sensor which is configured to emit a first light toward the first opening and receive through the second opening, a second light which is a reflected light of the first light; and
a prism sheet which is disposed between the base substrate and the proximity sensor; and
wherein a first angle between the first light incident from the proximity sensor to the prism sheet and a normal line of the prism sheet, the normal line being perpendicular to the prism sheet, is greater than a second angle between the first light which passes through the prism sheet and the normal line of the prism sheet.

19. The display device of claim 18 , wherein the first printed layer has a color that is configured to reflect at least 3% of the external light.

Assignees

• Samsung Display Co Ltd

Inventors

• Jin Kyongbin

Classifications

• H04M1/0266

  for a display module assembly · CPC title

• G06F1/3231

  Monitoring the presence, absence or movement of users · CPC title

• G06F1/3265

  Power saving in display device · CPC title

• G06F1/1637

  Details related to the display arrangement, including those related to the mounting of the display in the housing · CPC title

• G02B5/04

  Prisms · CPC title