Organic light emitting display panel and force-sensing display device

Patent metadata

Field	Value
Publication number	US-10636848-B2
Application number	US-201715487915-A
Country	US
Kind code	B2
Filing date	Apr 14, 2017
Priority date	Dec 13, 2016
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

An organic light emitting display panel is provided. The organic light emitting display panel includes a first substrate; a second substrate disposed to the first substrate; and a force sensing layer. The force sensing layer includes a first electrode; a second electrode; and a first insulating layer positioned between the first electrode and the second electrode. The second electrode is multiplexed with at least one second conductive layer on the second substrate.

First claim

What is claimed is:

1. An organic light emitting display panel, comprising:
a first substrate;
a second substrate disposed opposing the first substrate, wherein a reflective electrode layer, an array metal layer and an organic light emitting unit are disposed on a surface of the second substrate facing the first substrate, and the organic light emitting unit is disposed on a surface of the reflective electrode layer away from the second substrate; and
an integrated force sensing layer, comprising:
a first electrode;
a second electrode; and
a first insulating layer positioned between the first electrode and the second electrode,
wherein
the reflective electrode layer includes a first portion overlapping with the organic light emitting unit and a separate second portion non-overlapping with the organic light emitting unit, along a direction perpendicular to the first substrate, the first portion of the reflective electrode layer and the second portion of the reflective electrode layer are disconnected and are in a same layer and contain a same material, and the second portion, but not the first portion, of the reflective electrode layer is used as the second electrode, or
the array metal layer includes a first portion overlapping with the organic light emitting unit and a separate second portion non-overlapping with the organic light emitting unit, along the direction perpendicular to the first substrate, the first portion of the array metal layer and the second portion of the array metal layer are disconnected and are in a same layer and contain a same material, and the second portion, but not the first portion, of the array metal layer is used as the second electrode, and

a capacitance change between the first electrode and the second electrode detects a magnitude of force when the organic light emitting display panel is pressed.

2. The organic light emitting display panel according to claim 1 , wherein:
the first substrate is a packaging substrate,
the second substrate is an array substrate, and
the array substrate further includes a pixel definition layer and a plurality of optical spacers.

3. The organic light emitting display panel according to claim 2 , wherein the second portion of the reflective electrode layer used as the second electrode is non-overlapping with the first portion of the reflective electrode layer.

4. The organic light emitting display panel of claim 2 , wherein the second portion of the array metal layer used as the second electrode is non-overlapping with the first portion of the array metal layer.

5. The organic light emitting display panel according to claim 2 , wherein the array substrate further comprises an OLED cathode layer, and at least one portion of the OLED cathode layer is used as the first electrode.

6. The organic light emitting display panel according to claim 1 , wherein the first electrode is a first conductive layer provided on the first substrate.

7. The organic light emitting display panel according to claim 6 , further comprising:
a touch sensor provided on the first substrate, wherein the touch sensor includes at least one touch layer.

8. The organic light emitting display panel according to claim 7 , wherein the at least one touch layer of the touch sensor is used as the first electrode; or the touch sensor is disposed on a side of the first substrate away from the second substrate, and the first electrode is disposed on a side of the first substrate close to the second substrate.

9. The organic light emitting display panel according to claim 2 , wherein the first insulating layer includes the pixel defining layer or the plurality of optical spacers.

10. The organic light emitting display panel according to claim 7 , wherein the force sensing layer and the at least one touch layer share a same driving chip.

11. The organic light emitting display panel according to claim 1 , wherein:
the organic light emitting display panel includes a display area and a non-display area surrounding the display area, and
the force sensing layer is provided in the non-display area.

12. The organic light emitting display panel according to claim 1 , wherein the second electrode is divided into a plurality of blocks on the organic light emitting display panel.

13. A force sensing display device, comprising:
an organic light emitting display panel, including:
a first substrate;
a second substrate disposed opposing the first substrate, wherein a reflective electrode layer, an array metal layer and an organic light emitting unit are disposed on a surface of the second substrate facing the first substrate, and the organic light emitting unit is disposed on a surface of the reflective electrode layer away from the second substrate; and
an integrated force sensing layer, comprising:
a first electrode;
a second electrode; and
a first insulating layer positioned between the first electrode and the second electrode,
wherein
the reflective electrode layer includes a first portion overlapping with the organic light emitting unit and a separate second portion non-overlapping with the organic light emitting unit, along a direction perpendicular to the first substrate, the first portion of the reflective electrode layer and the second portion of the reflective electrode layer are disconnected and are in a same layer and contain a same material, and the second portion, but not the first portion, of the reflective electrode layer is used as the second electrode, or
the array metal layer includes a first portion overlapping with the organic light emitting unit and a separate second portion non-overlapping with the organic light emitting unit, along the direction perpendicular to the first substrate, the first portion of the array metal layer and the second portion of the array metal layer are disconnected and are in a same layer and contain a same material, and the second portion, but not the first portion, of the array metal layer is used as the second electrode, and

a capacitance change between the first electrode and the second electrode detects a magnitude of force when the organic light emitting display panel is pressed.

14. The force sensing display device according to claim 13 , wherein:
the organic light emitting display panel further comprises a touch layer, and
the force sensing layer and the touch layer share a same drive chip.

15. The force sensing display device according to claim 14 , wherein the organic light emitting display panel, the force sensing layer, and the touch layer share the same drive chip.

16. The force sensing display device of claim 13 , wherein:
the organic light emitting display panel further comprises a touch layer,
the touch layer is used as the first electrode, and
at least one portion of the reflective electrode layer of the second substrate is used as the second electrode.

17. The organic light emitting display panel according to claim 2 ,
wherein the first insulating layer includes the pixel defining layer and the plurality of optical spacers.

18. The organic light emitting display panel according to claim 5 , wherein:
the at least one portion of the OLED cathode layer used as the first electrode is overlapped with, along the direction perpendicular to the first substrate, second portion of the reflective electrode layer or the second portion of the array metal layer used as the second electrode.

19. The organic light emitting display panel according to claim 6 , wherein:
the first conductive layer is overlapped with, along the direction

Assignees

• Shanghai Tianma Am Oled Co Ltd
• Tianma Micro Electronics Co Ltd

Inventors

• Shen Yongcai
• Qian Dong
• Xin Yu
• Li Wang
• Fan Qingjie

Classifications

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/0414 Primary

  using force sensing means to determine a position · CPC title

• H01L27/3276

  Electricity · mapped topic

• H01L27/323 Primary

  Electricity · mapped topic