IP Library Granted Patent US 11,475,840
Granted Patent B2
US 11,475,840 · App. 16/910,078 · Granted Oct 18, 2022

Organic light-emitting display panel and display device

Inventors: Shuai Yang (Shanghai, CN); Yue Li (Shanghai, CN); Zhi Liu (Shanghai, CN); Xingyao Zhou (Shanghai, CN)
Assignees: WUHAN TIANMA MICROELECTRONICS CO., LTD.; WUHAN TIANMA MIOROLECTRONICS CO., LTD. SHANGHAI BRANCH
G09G3/3258H01L27/3262G09G2310/0286H01L27/1251H01L27/1255H01L29/78645H01L29/78696
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Quick Facts
Patent No.
US 11,475,840
App. No.
16/910,078
Granted
Oct 18, 2022
Kind
B2
Abstract

An organic light-emitting display panel and a display device are provided. The organic light-emitting display panel includes a control circuit. The control circuit includes a plurality of transistors. The plurality of transistors includes at least one first-type transistor, and each of the at least one first-type transistor has a channel width and a channel length, one of which is greater than five times the other one. Each of the at least one first-type transistor is a single-gate transistor.

Claims (23)

1. An organic light-emitting display panel, comprising:

a control circuit comprising a plurality of transistors, the plurality of transistors comprising seven transistors, the seven transistors comprising four single-gate transistors and three double-gate transistors, the four single-gate transistors comprising at least one first-type transistor, and each of the three double-gate transistors being a second-type transistor,

wherein each of the at least one first-type transistor has a channel width and a channel length, one of which is greater than five times the other one, and each of the at least one first-type transistor is a single-gate transistor;

wherein at least two of the four single-gate transistors have different maximum cross-voltages, and each of the three second-type transistors has a maximum cross-voltage greater than 50% of an average maximum cross-voltage of six remaining transistors of the seven transistors except the second-type transistor; and

wherein the average maximum cross-voltage is an arithmetic average value that is obtained through dividing a sum of maximum cross-voltages of the remaining transistors by a number of the remaining transistors; or the average maximum cross-voltage is a median average value that is a middle value among the maximum cross-voltages of the remaining transistors that are arranged in order of magnitude, and the median average value is an arithmetic average value of two of the maximum cross-voltages of the remaining transistors in the middle if a number of the maximum cross-voltages of the remaining transistors is even.

2. The organic light-emitting display panel according to claim 1 , wherein the channel length is greater than five times the channel width.

3. The organic light-emitting display panel according to claim 1 , wherein the control circuit is a pixel driving circuit, and each of the at least one first-type transistor is a driving transistor.

4. The organic light-emitting display panel according to claim 3 , wherein the pixel driving circuit comprises at least one control node switching transistor, each of the at least one control node switching transistor is electrically connected to a control terminal of the driving transistor, and each of the at least one control node switching transistor is a double-gate transistor.

5. The organic light-emitting display panel according to claim 4 , wherein the plurality of seven transistors comprises:

a first switching transistor comprising a first terminal electrically connected to a first power voltage terminal, a second terminal electrically connected to a first terminal of the driving transistor, and a control terminal electrically connected to a light-emitting control terminal;

a second switching transistor comprising a first terminal electrically connected to a data voltage terminal and a second terminal electrically connected to the first terminal of the driving transistor;

a third switching transistor being one of the at least one control node switching transistor and comprising a first terminal electrically connected to the control terminal of the driving transistor and a second terminal electrically connected to a second terminal of the driving transistor;

a fourth switching transistor being one of the at least one control node switching transistor and comprising a first terminal electrically connected to a reference voltage terminal and a second terminal electrically connected to the control terminal of the driving transistor;

a fifth switching transistor comprising a first terminal electrically connected to the second terminal of the driving transistor and a control terminal electrically connected to the light-emitting control terminal; and

a sixth switching transistor comprising a first terminal electrically connected to the reference voltage terminal and a second terminal connected to a second terminal of the fifth switching transistor; and

wherein the pixel driving circuit further comprises a light-emitting element comprising a first terminal electrically connected to the second terminal of the sixth switching transistor and a second terminal electrically connected to a second power voltage terminal.

6. The organic light-emitting display panel according to claim 1 , wherein the channel width is greater than ten times the channel length.

7. A display device, comprising:

an organic light-emitting display panel, comprising:

a control circuit comprising a plurality of transistors, the plurality of transistors comprising seven transistors, and the seven transistors comprising four single-gate transistors and three double-gate transistors, the four single-gate transistors comprising at least one first-type transistor, and each of the three double-gate transistors being a second-type transistors,

wherein each of the at least one first-type transistor has a channel width and a channel length, one of which is greater than five times the other one, and each of the at least one first-type transistor is a single-gate transistor;

wherein at least two of the four single-gate transistors have different maximum cross-voltages, and each of the three second-type transistors has a maximum cross-voltage greater than 50% of an average maximum cross-voltage of six remaining transistors of the seven transistors except the second-type transistor; and

wherein the average maximum cross-voltage is an arithmetic average value that is obtained through dividing a sum of maximum cross-voltages of the remaining transistors by a number of the remaining transistors; or the average maximum cross-voltage is a median average value that is a middle value among the maximum cross-voltages of the remaining transistors that are arranged in order of magnitude, and the median average value is an arithmetic average value of two of the maximum cross-voltages of the remaining transistors in the middle if a number of the maximum cross-voltages of the remaining transistors is even.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 4, 2022
From: SHANGHAI TIANMA AM-OLED CO.,LTD.
To: WUHAN TIANMA MICRO-ELECTRONICS CO., LTD.; WUHAN TIANMA MICROELECTRONICS CO., LTD. SHANGHAI BRANCH
Reel/Frame 059498/0307 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 24, 2020
From: YANG, SHUAI; LI, YUE; LIU, ZHI; ZHOU, XINGYAO
To: SHANGHAI TIANMA AM-OLED CO., LTD.
Reel/Frame 053019/0724 →
Priority Claims (1)
CN 201911350605.2 · Dec 24, 2019 · national
Continuity (1)
Related Publication 20200320937A1 · Oct 8, 2020