Display

Patent metadata

Field	Value
Publication number	US-12315434-B2
Application number	US-202318396761-A
Country	US
Kind code	B2
Filing date	Dec 27, 2023
Priority date	Jul 3, 2023
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A display includes a first light emitting device. The first light emitting device includes a first switch and a second switch. The first switch is configured to adjust a first node according to a first clock signal. The second switch is configured to generate a first light emitting signal according to a first voltage signal. A control end of the second switch is coupled to the first node. The first clock signal switches between a first voltage level and a second voltage level. The first voltage signal has a third voltage level. The third voltage level is more than one of the first voltage level and the second voltage level and is less than the other one of the first voltage level and the second voltage level.

First claim

What is claimed is:

1. A display, comprising:
a first light emitting device, comprising:
a first switch configured to adjust a first node according to a first clock signal; and
a second switch configured to generate a first light emitting signal according to a first voltage signal, and a control end of the second switch is coupled to the first node,
wherein the first clock signal switches between a first voltage level and a second voltage level,
the first voltage signal has a third voltage level, and
the third voltage level is more than one of the first voltage level and the second voltage level and is less than the other one of the first voltage level and the second voltage level,
wherein an absolute value of a voltage difference between the second voltage level and the third voltage level is greater than or equal to a threshold voltage of the first switch.

2. The display of claim 1 , further comprising:
a third switch coupled to the first switch, a control end of the third switch is configured to receive a first control signal; and
a fourth switch coupled to the first switch, a control end of the fourth switch is configured to receive a second control signal,
wherein the first control signal and the second control signal are complementary to each other.

3. The display of claim 2 , wherein when one of the first control signal and the second control signal has the first voltage level, the other one of the first control signal and the second control signal has the second voltage level.

4. The display of claim 1 , further comprising:
a third switch configured to generate a first driving signal according to a second voltage signal, a control end of the third switch is coupled to the first node,
wherein the second voltage signal has a fourth voltage level, and
the fourth voltage level is larger than one of the second voltage level and the third voltage level and is less than the other one of the second voltage level and the third voltage level.

5. The display of claim 4 , wherein an absolute value of a voltage difference between the fourth voltage level and the third voltage level is greater than or equal to a threshold voltage of the second switch.

6. The display of claim 5 , wherein an absolute value of a voltage difference between the fourth voltage level and the second voltage level is greater than or equal to a threshold voltage of the first switch.

7. The display of claim 4 , further comprising:
a fourth switch coupled to the first switch, a control end of the fourth switch is configured to receive a first control signal; and
a fifth switch coupled to the first switch, a control end of the fifth switch is configured to receive a second control signal,
wherein the first control signal and the second control signal are complementary to each other.

8. The display of claim 7 , wherein when one of the first control signal and the second control signal has the first voltage level, the other one of the first control signal and the second control signal has the second voltage level.

9. A display device, comprising:
a first switch configured to adjust a first node according to a first clock signal;
a capacitor; and
a second switch configured to generate a first light emitting signal according to a first voltage signal, and a control end of the second switch is coupled to the first node,
wherein a first end of the capacitor is configured to receive a second clock signal complementary to the first clock signal,
a second end of the capacitor is coupled to the first node,
the first clock signal switches between a first voltage level and a second voltage level,
the first voltage signal has a third voltage level, and
the third voltage level is more than one of the first voltage level and the second voltage level and is less than the other one of the first voltage level and the second voltage level,
wherein an absolute value of a voltage difference between the second voltage level and the third voltage level is greater than or equal to a threshold voltage of the first switch.

10. The display device of claim 9 , further comprising:
a third switch coupled to the first switch, a control end of the third switch is configured to receive a first control signal; and
a fourth switch coupled to the first switch, a control end of the fourth switch is configured to receive a second control signal,
wherein the first control signal and the second control signal are complementary to each other.

11. The display device of claim 10 , wherein when one of the first control signal and the second control signal has the first voltage level, the other one of the first control signal and the second control signal has the second voltage level.

12. The display device of claim 9 , further comprising:
a third switch configured to generate a first driving signal according to a second voltage signal, a control end of the third switch is coupled to the first node,
wherein the second voltage signal has a fourth voltage level, and
the fourth voltage level is larger than one of the second voltage level and the third voltage level and is less than the other one of the second voltage level and the third voltage level.

13. The display device of claim 12 , wherein an absolute value of a voltage difference between the fourth voltage level and the third voltage level is greater than or equal to a threshold voltage of the second switch.

14. The display device of claim 13 , wherein an absolute value of a voltage difference between the fourth voltage level and the second voltage level is greater than or equal to a threshold voltage of the first switch.

15. The display device of claim 12 , further comprising:
a fourth switch coupled to the first switch, a control end of the fourth switch is configured to receive a first control signal; and
a fifth switch coupled to the first switch, a control end of the fifth switch is configured to receive a second control signal,
wherein the first control signal and the second control signal are complementary to each other.

16. The display device of claim 15 , wherein when one of the first control signal and the second control signal has the first voltage level, the other one of the first control signal and the second control signal has the second voltage level.

Assignees

• Auo Corp

Inventors

• Tung Che-Wei
• Lin Wei-Li
• Chang Chin-Hao
• Huang Wei-Kai

Classifications

• G09G2330/02

  Details of power systems and of start or stop of display operation · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2310/0243

  Details of the generation of driving signals · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title