Display apparatus

Patent metadata

Field	Value
Publication number	US-12165585-B2
Application number	US-202318225128-A
Country	US
Kind code	B2
Filing date	Jul 22, 2023
Priority date	Aug 3, 2021
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

A pixel of a display apparatus includes a light emitting device and a pixel circuit connected to first to third gate control lines and the light emitting device, the pixel circuit including first to fourth nodes. The pixel circuit includes a driving transistor connected to the first to third nodes, a first transistor connected to the first gate control line and the first and second nodes, a second transistor connected to the second gate control line, the second node, and a first driving voltage line, a third transistor connected to the first gate control line, the third node, and the fourth node, a fourth transistor connected to the first gate control line, the fourth node, and an initialization voltage line, a fifth transistor connected to the third gate control line, the third node, and a data line, and a storage capacitor between the first node and the fourth node.

First claim

What is claimed is:

1. A display apparatus, comprising:
a display panel including a display area, including a plurality of pixels arranged in a first direction and a second direction crossing the first direction, and a non-display area disposed near the display area;
a gate driver disposed in the non-display area, the gate driver comprising:
a scan driving circuit disposed adjacent to the display area; and
an emission control driving circuit disposed farther away from the display area than the scan driving circuit,

wherein the scan driving circuit is configured to receive at least one first clock signal and to supply a scan signal to pixels arranged in at least one horizontal line parallel to the first direction among the plurality of pixels,
wherein the emission control driving circuit is configured to receive at least one second clock signal different from the at least one first clock signal and to supply an emission control signal to pixels in one or more horizontal lines parallel to the first direction among the plurality of pixels,
wherein each of the plurality of pixels comprises:
a light emitting device; and
a pixel circuit connected to first to third gate control lines and the light emitting device,

wherein the pixel circuit of each of the plurality of pixels is configured to be driven in first to fifth intervals, and
wherein the pixel circuit of each of two pixels adjacent to each other in the second direction among the plurality of pixels is configured to be identically driven in the first, fourth, and fifth intervals and to be differently driven in the second and third intervals.

2. The display apparatus of claim 1 , wherein the scan driving circuit is disposed between the display area and the emission control driving circuit.

3. The display apparatus of claim 1 , wherein the scan driving circuit and the emission control driving circuit share a same driving voltage.

4. The display apparatus of claim 1 , wherein the emission control driving circuit is further configured to supply the emission control signal to two pixels adjacent to each other in the second direction among the plurality of pixels.

5. The display apparatus of claim 1 , wherein the emission control driving circuit is further configured to supply the emission control signal to two pixels adjacent to each other in the second direction among the plurality of pixels to be shared by the two pixels.

6. The display apparatus of claim 1 , wherein:
the pixel circuit comprises a driving transistor, first to fifth transistors, and a storage capacitor, and
at least one of the driving transistor and the first to fifth transistors has a first conductive type, and another of the driving transistor and the first to fifth transistors has a second conductive type which differs from the first conductive type.

7. The display apparatus of claim 6 , wherein at least one of the driving transistor and the first to fifth transistors comprises an oxide semiconductor layer including oxide, and another of the driving transistor and the first to fifth transistors comprises a silicon semiconductor layer including crystalline silicon.

8. The display apparatus of claim 7 , wherein:
the driving transistor comprises the oxide semiconductor layer having the first conductive type,
the first and fourth transistors comprise the oxide semiconductor layer or the silicon semiconductor layer having the first conductive type, and
the second, third, and fifth transistors comprise the silicon semiconductor layer having the second conductive type.

9. The display apparatus of claim 1 , wherein the scan signal and the emission control signal have a first voltage level and a second voltage level which differs from the first voltage level.

10. The display apparatus of claim 9 , wherein:
the second and third intervals of each of the two pixels overlap an interval in which first and second emission control signals have the first voltage level,
the second interval of each of the two pixels is an interval in which each scan signal has the second voltage level in the interval in which the first and second emission control signals have the first voltage level, and
the third interval of each of the two pixels is an interval other than the second interval in the interval in which the first and second emission control signals have the first voltage level.

11. The display apparatus of claim 1 , wherein the pixel circuit comprises:
first to fourth nodes;
a driving transistor connected to the first to third nodes;
a first transistor connected to the first gate control line and to the first and second nodes;
a second transistor connected to the second gate control line, the second node, and a first driving voltage line;
a third transistor connected to the first gate control line, the third node, and the fourth node;
a fourth transistor connected to the first gate control line, the fourth node, and an initialization voltage line;
a fifth transistor connected to the third gate control line, the third node, and a data line; and
a storage capacitor between the first node and the fourth node.

12. The display apparatus of claim 11 , wherein:
a signal of the first gate control line has a first voltage level in the first to third intervals and has a second voltage level differing from the first voltage level in the fourth and fifth intervals,
a signal of the second gate control line has the first voltage level in the second to fourth intervals and has the second voltage level in the first and fifth intervals, and
a signal of the third gate control line has the first voltage level in the first interval and the third to fifth intervals and has the second voltage level in the second interval.

13. The display apparatus of claim 12 , wherein:
the first transistor is configured to be turned on in only the first to third intervals among the first to fifth intervals;
the second transistor is configured to be turned on in only the first and fifth intervals among the first to fifth intervals;
the third transistor is configured to be turned on in only the fourth and fifth intervals among the first to fifth intervals;
the fourth transistor is configured to be turned on in only the first to third intervals among the first to fifth intervals; and
the fifth transistor is configured to be turned on in only the second interval among the first to fifth intervals.

14. The display apparatus of claim 1 , wherein:
the non-display area comprises a first non-display area and a second non-display area parallel to each other with the display area therebetween, and
the gate driver comprises a first gate driver and a second gate driver that are symmetrical to each other with the display area therebetween.

15. The display apparatus of claim 14 , wherein:
the first gate driver is disposed in the first non-display area and includes:
a first scan driving circuit connected to pixels arranged in at least one odd horizontal line among the plurality of pixels; and
a first emission control driving circuit configured to supply a first emission control signal to pixels arranged in odd and even horizontal lines adjacent to each other among the plurality of pixels; and

the second gate driver is disposed in the second non-display area and includes:
a second scan driving circuit connected to pixels arranged in at least one even horizontal line among the plurality of pixels; and
a second emission control driving circuit configured to supply a second emission control signal different from the first emission control signal to pixels arranged in odd and even horizontal lines adjacent to each ot

Assignees

• Lg Display Co Ltd

Inventors

• Bong Junho
• Park Minwoo

Classifications

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G3/3291

  in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G3/32

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09G3/2074 Primary

  using sub-pixels · CPC title