Display panel having one display region surrounding another display regiion and display device having the same

Patent metadata

Field	Value
Publication number	US-11271053-B2
Application number	US-202016851697-A
Country	US
Kind code	B2
Filing date	Apr 17, 2020
Priority date	Dec 31, 2019
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A display panel and a display device are provided in the present disclosure. The display panel includes a first display region and a second display region surrounding the first display region, and further includes a first substrate, including a first base substrate. The first display region includes a plurality of light-emitting units on the first base substrate, where a light-emitting unit of the plurality of light-emitting units includes an organic light-emitting element and a drive circuit configured to drive the organic light-emitting element to emit light. The first display region further includes a plurality of first light-transmitting holes, where the plurality of first light-transmitting holes do not overlap the plurality of light-emitting units along a direction perpendicular to a plane of the first base substrate, and the plurality of first light-transmitting holes are non-rectangular. The first display region further includes a first sub-display region and a second sub-display region.

First claim

What is claimed is:

1. A display panel, comprising:
a first display region and a second display region surrounding the first display region; and
a first substrate, including a first base substrate,
wherein the first display region includes:
a plurality of light-emitting units on the first base substrate, wherein a light-emitting unit of the plurality of light-emitting units includes an organic light-emitting element and a drive circuit configured to drive the organic light-emitting element to emit light;
a plurality of first light-transmitting holes, wherein the plurality of first light-transmitting holes do not overlap the plurality of light-emitting units along a direction perpendicular to a plane of the first base substrate, and the plurality of first light-transmitting holes are non-rectangular; and
a first sub-display region and a second sub-display region, wherein in the first sub-display region, a sum of areas of the plurality of first light-transmitting holes per unit area is S1 and in the second sub-display region, a sum of areas of the plurality of first light-transmitting holes per unit area is S2, wherein S1>S2.

2. The display panel according to claim 1 , further including:
a light-shielding layer, located at the first display region and on the first base substrate, wherein:
the light-shielding layer includes a plurality of first openings and a plurality of second openings;
along the direction perpendicular to the plane of the first base substrate, a plurality of organic light-emitting elements at least partially overlaps the plurality of first openings; and
the plurality of second openings are used as the plurality of first light-transmitting holes.

3. The display panel according to claim 2 , wherein:
the organic light-emitting element includes an anode on a side of the drive circuit away from the first base substrate, a light-emitting layer on a side of the anode away from the drive circuit, and a cathode on a side of the light-emitting layer away from the anode; and
the anode and the light-shielding layer are made of a same material and disposed in a same layer.

4. The display panel according to claim 2 , wherein:
the drive circuit includes a thin film transistor and a storage capacitor; the storage capacitor includes a first electrode plate and a second electrode plate; the thin film transistor includes a gate electrode, a source electrode, and a drain electrode; and the organic light-emitting element includes an anode, a light-emitting layer, and a cathode;
the display panel includes a blocking layer on the first base substrate, a first metal layer on a side of the blocking layer away from the first base substrate, a second metal layer on a side of the first metal layer away from the first base substrate, a third metal layer on a side of the second metal layer away from the first base substrate, an anode layer on a side of the third metal layer away from the first base substrate, an light-emitting layer on a side of the anode layer away from the first base substrate, and a cathode layer on a side of the light-emitting layer away from the first base substrate;
the blocking layer includes a light-shielding portion located on a side of the gate electrode of the thin film transistor adjacent to the first base substrate;
the first metal layer includes the gate electrode of the thin film transistor and the first electrode plate of the storage capacitor;
the second metal layer includes the second electrode plate of the storage capacitor; and
the third metal layer includes the source electrode and the drain electrode of the thin film transistor.

5. The display panel according to claim 4 , wherein:
the blocking layer further includes the light-shielding layer.

6. The display panel according to claim 4 , further including:
a fourth metal layer on a side of the third metal layer away from the first base substrate, wherein the fourth metal layer includes the light-shielding layer.

7. The display panel according to claim 4 , wherein:
the anode layer includes the anode of the organic light-emitting element and the light-shielding layer.

8. The display panel according to claim 1 , wherein:
along the direction perpendicular to the plane of the first base substrate, a first light-transmitting hole of the plurality of first light-transmitting holes is an area enclosed by adjacent light-emitting units and connecting wiring between adjacent light-emitting units.

9. The display panel according to claim 1 , wherein:
a drive circuit includes a thin film transistor and a storage capacitor; the storage capacitor includes a first electrode plate and a second electrode plate; the thin film transistor includes a gate electrode, a source electrode, and a drain electrode; and the organic light-emitting element includes an anode, a light-emitting layer, and a cathode;
the display panel includes an active layer on a side of the first base substrate, a first metal layer on a side of the active layer away from the first base substrate, a second metal layer on a side of the first metal layer away from the first base substrate, a third metal layer on a side of the second metal layer away from the first base substrate, an anode layer on a side of the third metal layer away from the first base substrate, a light-emitting layer on a side of the anode layer away from the first base substrate, and a cathode layer on a side of the light-emitting layer away from the first base substrate, wherein the first metal layer includes the gate electrode of the thin film transistor and the first electrode plate of the storage capacitor; the second metal layer includes the second electrode plate of the storage capacitor; and the third metal layer includes the source electrode and the drain electrode of the thin film transistor;
the display panel further includes a first insulation layer between the active layer and the first metal layer, a second insulation layer between the first metal layer and the second metal layer, and a third insulation layer between the second metal layer and the third metal layer, a planarization layer between the third metal layer and the anode layer, and a pixel define layer on a side of the anode layer away from the first base substrate; and
a first light-transmitting hole of the plurality of light-transmitting holes passes through the first insulation layer, the second insulation layer, the third insulation layer, the planarization layer, and the pixel define layer; or a first light-transmitting hole of the plurality of light-transmitting holes passes through the planarization layer and the pixel define layer.

10. The display panel according to claim 1 , wherein:
the first display region further includes a plurality of second light-transmitting holes; along the direction perpendicular to the plane of the first base substrate, the plurality of second light-transmitting holes do not overlap the plurality of light-emitting units; the second light-transmitting holes are non-rectangular; an area of a first light-transmitting hole of the plurality of first light-transmitting holes is a first area S11 and an area of a second light-transmitting hole of the plurality of second light-transmitting holes is a second area S12, wherein S11>S12; and
in the first sub-display region, a sum of areas of the plurality of second light-transmitting holes per unit area is S3; and in the second sub-display region, a sum of areas of the plurality of second light-transmitting holes per unit area is S4, wherein S3<S4.

11. The display panel according to claim 10 , wherein:
in the first sub-display region, a sum of areas of the plurality of first light-transmitting holes and the plurality of secon

Assignees

• Wuhan Tianma Micro Electronics Co Ltd

Inventors

• Liang Yujiao
• Ma Yangzhao

Classifications

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/60 Primary

  OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes · CPC title

• H01L27/3262

  Electricity · mapped topic