Display device

• US 10,613,667 B2
• Filed: 12/11/2017
• Issued: 04/07/2020
• Est. Priority Date: 02/03/2017
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Hong, Won Ki, Lee, Tae Hee
• Primary Examiner(s): Lu, William
• Application Number:
  US15/838,341
• Publication Number:
  US 20180224992A1
• Time in Patent Office: 848 Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04144 using an array of force sensing means position sensing using the local deformation of sensor cells G06F3/0447
• CPC Class Codes: G09G 2310/0264 Details of driving circuits
• CPC Class Codes: H10N 30/80 Constructional details

Abstract

A display device may include: a display panel; and a pressure sensor provided on one surface of the display panel, wherein the pressure sensor includes: a first substrate including: a first base substrate; and receiving electrodes disposed on the first base substrate, the receiving electrodes extending in a first direction; a second substrate disposed between the first substrate and the display panel, the second substrate including: a second base substrate; and driving electrodes disposed on a surface of the second base substrate facing the first substrate, the driving electrodes extending in a second direction crossing the receiving electrodes; and a variable resistance layer provided on a surface of one of the driving electrodes and the receiving electrodes, wherein the second base substrate includes a material configured for at least one of blocking light and absorbing light.

Claims

1. A display device, comprising:

a display panel; and

a pressure sensor provided on one surface of the display panel,

wherein the pressure sensor comprises;

a first substrate comprising;

a first base substrate; and

receiving electrodes disposed on the first base substrate, the receiving electrodes extending in a first direction;

a second substrate disposed between the first substrate and the display panel, the second substrate comprising;

a light shielding layer; and

driving electrodes disposed directly on a surface of the light shielding layer facing the first substrate, the driving electrodes extending in a second direction crossing the receiving electrodes; and

a variable resistance layer provided on a surface of one of the driving electrodes and the receiving electrodes,

wherein the light shielding layer is configured to completely block or absorb light from transmitting through.

2. The display device of claim 1, wherein the variable resistance layer comprises:

a polymer resin; and

at least one of a piezo-electric material and a conductive material dispersed within the polymer resin.

3. The display device of claim 2, wherein resistance of the variable resistance layer is decreased according to an increase in a pressure.

4. The display device of claim 2, wherein the pressure sensor further comprises a spacer which uniformly maintains a gap between the first substrate and the second substrate.

5. The display device of claim 1, further comprising:

a cushion layer provided on an external surface of the first base substrate and comprising an elastically deformable material,

wherein the external surface of the first base substrate faces away from the second substrate.

6. The display device of claim 1, wherein the pressure sensor is provided on a surface of the display panel in a direction opposite to a light emission direction.

7. The display device of claim 1, further comprising:

a window provided on a surface of the display panel in a light emission direction.

8. A display device, comprising:

a display panel; and

a pressure sensor provided on one surface of the display panel,

wherein the pressure sensor comprises;

a first substrate comprising;

a first base substrate; and

receiving electrodes disposed on the first base substrate, the receiving electrode extending in a first direction;

a second substrate disposed between the first substrate and the display panel, the second substrate comprising;

a light shielding layer disposed between the display panel and the pressure sensor;

a first cushion layer; and

driving electrodes disposed directly on a surface of the first cushion layer facing the first substrate, the driving electrode extending in a second direction crossing the receiving electrodes; and

a variable resistance layer provided on a surface of one of the driving electrodes and the receiving electrodes,

wherein the first cushion layer comprises an elastically deformable material, and

wherein the light shielding layer is configured to completely block or absorb light from transmitting through.

9. The display device of claim 8, wherein the variable resistance layer comprises:

a polymer resin; and

at least one of a piezo-electric material and a conductive material dispersed within the polymer resin.

10. The display device of claim 9, wherein resistance of the variable resistance layer is decreased according to an increase in a pressure.

11. The display device of claim 9, wherein the pressure sensor is provided on a surface of the display panel in a direction opposite to a light emission direction.

12. The display device of claim 8, further comprising:

a second cushion layer provided on an external surface of the first base substrate and comprises an elastically deformable material.

13. The display device of claim 8, further comprising:

a window provided on a surface of the display panel in a light emission direction.

14. A display device, comprising:

a display panel comprising a light emitting surface configured to emit light;

a pressure sensor provided on the light emitting surface of the display panel; and

a light shielding layer provided on another surface of the display panel, the light shielding layer configured to completely block or absorb light from transmitting through,

wherein the pressure sensor comprises;

a first substrate comprising;

a first base substrate; and

receiving electrodes disposed on the first base substrate, the receiving electrodes extending in a first direction;

a second substrate comprising;

a window; and

driving electrodes disposed on a surface of the window facing the first substrate, the driving electrode extending in a second direction crossing the receiving electrodes; and

a variable resistance layer provided on a surface of one of the driving electrodes and the receiving electrodes,

wherein the first substrate is disposed between the display panel and the second substrate, and

wherein the window is an outermost surface of the display device comprising a material allowing light to pass through.

15. The display device of claim 14, wherein the variable resistance layer comprises a polymer resin, and at least one of a piezo-electric material and a conductive material dispersed within the polymer resin.

16. The display device of claim 15, wherein resistance of the variable resistance layer is decreased according to an increase in a pressure.

17. The display device of claim 15, further comprising:

a polarizing layer provided between the display panel and the first substrate.

18. The display device of claim 15, wherein the first base substrate is a polarizing layer.