Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-10867560-B2
Application number	US-201816168542-A
Country	US
Kind code	B2
Filing date	Oct 23, 2018
Priority date	Nov 28, 2017
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

An organic light emitting display device includes: a display panel including a plurality of pixel rows each including first pixel groups alternating with second pixel groups; a gate driver configured to provide a first group gate signal to the first pixel groups, and to provide a second group gate signal to the second pixel groups; a data driver configured to output data voltages to a plurality of output line groups; and a connection controller configured to connect the output line groups to a first data line group in response to a first connection control signal, and to connect the output line groups to a second data line group in response to a second connection control signal.

First claim

What is claimed is:

1. An organic light emitting display device comprising:
a display panel including a plurality of pixel rows each including first pixel groups alternating with second pixel groups;
a gate driver configured to provide a first group gate signal to the first pixel groups, and to provide a second group gate signal to the second pixel groups;
a data driver configured to output data voltages to a plurality of output line groups; and
a connection controller configured to connect the output line groups to a first data line group in response to a first connection control signal, and to connect the output line groups to a second data line group in response to a second connection control signal,
wherein an on-period of the second group gate signal partially overlaps an on-period of the first group gate signal,
wherein the first data line group is connected to the first pixel groups included in the pixel rows,
wherein the second data line group is connected to the second pixel groups included in the pixel rows,
wherein an on-period of the first connection control signal partially overlaps an on-period of the second connection control signal,
wherein one frame period includes an initialization period, a compensation period, and an emission period in sequence,
wherein the compensation period includes a first compensation period, a second compensation period, and a third compensation period in sequence,
wherein, in the first compensation period, one of the first and second connection control signals has an on-level, and another one of the first and second connection control signals has an off-level,
wherein, in the second compensation period, both of the first and second connection control signals have the on-level, and
wherein, in the third compensation period, the one of the first and second connection control signals has the off-level, and the another one of the first and second connection control signals has the on-level.

2. The organic light emitting display device of claim 1 , wherein the first pixel groups included in each pixel row receive the first group gate signal through a first group gate line, and
wherein the second pixel groups included in each pixel row receive the second group gate signal through a second group gate line.

3. The organic light emitting display device of claim 1 , wherein odd-numbered pixel groups included in each pixel row correspond to the first pixel groups, and
wherein even-numbered pixel groups included in each pixel row correspond to the second pixel group.

4. The organic light emitting display device of claim 1 , wherein each of the first pixel groups includes a first pixel and a second pixel adjacent to the first pixel,
wherein the first pixel includes a first sub-pixel configured to emit a first color light, and a second sub-pixel configured to emit a second color light, and
wherein the second pixel includes a third sub-pixel configured to emit a third color light, and a fourth sub-pixel configured to emit the second color light.

5. The organic light emitting display device of claim 4 , wherein a first data line connected to the first sub-pixel and a second data line connected to the second sub-pixel are between the first sub-pixel and the second sub-pixel, and extend in a pixel column direction, and
wherein a third data line connected to the third sub-pixel and a fourth data line connected to the fourth sub-pixel are between the third sub-pixel and the fourth sub-pixel, and extend in the pixel column direction.

6. The organic light emitting display device of claim 5 , wherein no data line for providing the data voltages is between the first pixel and the second pixel.

7. The organic light emitting display device of claim 5 , wherein a layout of the first sub-pixel and a layout of the second sub-pixel are symmetric with respect to the pixel column direction.

8. The organic light emitting display device of claim 4 , wherein the first sub-pixel includes:
a driving transistor including a first terminal connected to a first node, a second terminal connected to a second node, and a gate terminal connected to a third node;
a first transistor including a first terminal receiving the data voltage, a second terminal connected to the first node, and a gate terminal receiving the first group gate signal;
a second transistor including a first terminal connected to the second node, a second terminal connected to the third node, and a gate terminal receiving the first group gate signal;
a third transistor including a first terminal connected to an initialization voltage, a second terminal connected to the third node, and a gate terminal receiving an initialization control signal;
a fourth transistor including a first terminal connected to a first power supply voltage, a second terminal connected to the first node, and a gate terminal receiving an emission control signal;
a fifth transistor including a first terminal connected to the second node, a second terminal connected to a fourth node, and a gate terminal receiving the emission control signal;
a sixth transistor including a first terminal connected to the initialization voltage, a second node connected to the fourth node, and a gate terminal receiving the initialization control signal;
a storage capacitor connected between the first power supply voltage and the third node; and
an organic light emitting diode including a first electrode connected to the fourth node, and a second electrode connected to a second power supply voltage lower than the first power supply voltage.

9. The organic light emitting display device of claim 8 , wherein one frame period includes an initialization period, the compensation period, and the corresponding emission period in sequence,
wherein, during the initialization period, voltages of the third node and the fourth node are initialized by the initialization voltage,
wherein, during the compensation period, the data voltage is transferred to the driving transistor, and a threshold voltage of the driving transistor is compensated, and
wherein, during the corresponding emission period, the organic light emitting diode emits light.

10. The organic light emitting display device of claim 9 , wherein, during the compensation period, the first transistor and the second transistor are turned on.

11. The organic light emitting display device of claim 10 , wherein, in the first and second compensation periods, the first node is electrically connected to an output amplifier of the data driver.

12. The organic light emitting display device of claim 10 , wherein, in the third compensation period, the first terminal of the first transistor is in a floating state.

Assignees

• Samsung Display Co Ltd

Inventors

• Yoon Changnoh
• Yang Jin-Wook

Classifications

• G09G2320/0233

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

• G09G2300/0819

  used for counteracting undesired variations, e.g. feedback or autozeroing · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title

• G09G2230/00

  Details of flat display driving waveforms · CPC title

• G09G3/3233 Primary

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