Pixel structure, display panel and display apparatus

• US 9,570,532 B2
• Filed: 12/12/2013
• Issued: 02/14/2017
• Est. Priority Date: 12/13/2012
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Huangfu, Lujiang, Ma, Zhanjie
• Primary Examiner(s): MENZ, LAURA MARY
• Application Number:
  US14/104,485
• Publication Number:
  US 20140167011A1
• Time in Patent Office: 1,160 Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 59/86 Series electrical configurations of multiple OLEDs
• CPC Class Codes: H10K 71/441 in the presence of solvent vapors, e.g. solvent vapour annealing

Abstract

The embodiment of the present invention provides a pixel structure, pixel unit structure, display panel and display apparatus, which is used to increase the electrical-optical efficiency of the display apparatus. The pixel structure includes an active matrix driving circuit, also includes at least two light emitting devices connected in series which are connected to the active matrix driving circuit, the light emitting devices compose the light emitting device group, and the active matrix driving circuit drives the light emitting devices to emit light.

Claims

1. A display panel, wherein a pixel unit structure of the display panel comprises three pixel structures of a red pixel structure, a green pixel structure, and a blue pixel structure, wherein at least one of these three pixel structures comprises an active matrix driving circuit and further comprises at least two light emitting devices connected in series which are connected to the active matrix driving circuit, the light emitting devices compose a light emitting device group, and the active matrix driving circuit drives the light emitting devices to emit light;

wherein the active matrix driving circuit comprises a first end and a second end, the first end is coupled to a first reference voltage source, the second end is coupled to a second reference voltage source, the light emitting devices connected in series are disposed on the first end or the second end of the active matrix driving circuit, or disposed on the first end and the second end of the active matrix driving circuit respectively;

when there are more than one of the light emitting devices disposed on the first end or the second end of the active matrix driving circuit, an anode of one light emitting device is electrically connected to a cathode of an adjacent light emitting device;

when there are more than one of the light emitting devices disposed on the first end or the second end;

the light emitting devices connected in series comprise;

a substrate;

a first anode and a second anode arranged at the same layer on the substrate;

a first organic light emitting layer and a second organic light emitting layer arranged at the same layer on the first anode and the second anode respectively;

a first cathode and a second cathode arranged at the same layer on the first organic light emitting layer and the second organic light emitting layer respectively;

a first insulating layer and a second insulating layer are arranged opposite to each other and between the first organic light emitting layer and the second organic light emitting layer, and there exists a gap between the first insulating layer and the second insulating layer;

the first anode and the second cathode extend into the gap, and the second cathode is directly electrically connected to a portion of the first anode extending into the gap;

or

the light emitting devices connected in series comprise;

the substrate;

the first cathode and the second cathode arranged at the same layer on the substrate;

the first organic light emitting layer and the second organic light emitting layer arranged at the same layer on the first cathode and the second cathode respectively;

the first anode and the second anode arranged at the same layer on the first organic light emitting layer and the second organic light emitting layer respectively;

a first insulating layer and a second insulating layer are arranged opposite to each other and between the first organic light emitting layer and the second organic light emitting layer, and there exists a gap between the first insulating layer and the second insulating layer;

the first cathode and the second anode extend into the gap, and the second anode is directly electrically connected to a portion of the first cathode extending into the gap.

2. The display panel according to claim 1, wherein, the light emitting devices connected in series are red light emitting devices, green light emitting devices or blue light emitting devices;

in each pixel unit structure, the number of the red light emitting devices is different from the number of the green light emitting devices and/or the number of the red light emitting devices is different from the number of the blue light emitting devices, and/or the number of the green light emitting devices is different from the number of the blue light emitting devices.

3. The display panel according to claim 2, wherein, the number of the red light emitting devices is larger than the number of the blue light emitting devices, and the number of the green light emitting devices is larger than the number of the blue light emitting devices.

4. The display panel according to claim 3, wherein, in each pixel unit structure, the number of the red light emitting devices is 2-5, the number of the green light emitting devices is 2-6, and the number of the blue light emitting devices is 1-3.

5. The display panel according to claim 1, wherein the light emitting device is an organic light emitting diode.

6. The display panel according to claim 1, wherein light emitting areas of the light emitting devices connected in series are the same.

7. A display apparatus, comprising the display panel according to claim 1.

8. The display apparatus according to claim 7, wherein, the light emitting devices connected in series are red light emitting devices, green light emitting devices or blue light emitting devices;

in each pixel unit structure, the number of the red light emitting devices is different from the number of the green light emitting devices and/or the number of the red light emitting devices is different from the number of the blue light emitting devices, and/or the number of the green light emitting devices is different from the number of the blue light emitting devices.

9. The display apparatus according to claim 8, the number of the red light emitting devices is larger than the number of the blue light emitting devices, and the number of the green light emitting devices is larger than the number of the blue light emitting devices.

10. The display apparatus according to claim 9, wherein, in each pixel unit structure, the number of the red light emitting devices is 2-5, the number of the green light emitting devices is 2-6, and the number of the blue light emitting devices is 1-3.

11. The display panel according to claim 1, wherein all the light emitting devices connected in series are red light emitting devices, or all the light emitting devices connected in series are green light emitting devices, or all the light emitting devices connected in series are blue light emitting devices.