Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-9424781-B2
Application number	US-201414581618-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Sep 10, 2014
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

An organic light emitting display is disclosed. The organic light emitting display includes a display panel having subpixels; a data driving part for supplying a data signal to the display panel; a compensation circuit part for sensing the subpixels; a power generation part for generating and outputting power to be supplied to the display panel and the data driving part; a voltage line wired between an output terminal of the power generation part and the display panel, the voltage line to transmit a voltage output from the power generation part to the display panel; and a power control part for controlling the voltage line.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a display panel having subpixels including organic light emitting diodes, each subpixel including a respective organic light emitting diode;
a data driving part for supplying a data signal to the display panel;
a compensation circuit part for sensing impedance values of the organic light emitting diodes of the subpixels;
a power generation part for generating and outputting power to be supplied to the display panel and the data driving part;
a voltage line wired between an output terminal of the power generation part and the display panel, the voltage line to transmit a voltage output from the power generation part to the display panel; and
a power control part for controlling the voltage line, the power control part to block the voltage line to prevent the voltage from being supplied to the display panel, when an impedance value of an organic light emitting diode included in a subpixel is sensed.

2. The organic light emitting display of claim 1 , wherein the power control part turns off a switch to disconnect the voltage line wired between the output terminal of the power generation part and the display panel, when the impedance value of the organic light emitting diode included in the subpixel is sensed.

3. The organic light emitting display of claim 1 , wherein the power control part is turned on or turned off in response to a power control signal supplied from a timing control part for controlling the data driving part.

4. An organic light emitting display device, comprising:
a display panel having subpixels including organic light emitting diodes, each subpixel including a respective organic light emitting diode;
a data driving part for supplying a data signal to the display panel;
a compensation circuit part for sensing threshold voltages of the organic light emitting diodes of the subpixels;
a power generation part for generating and outputting power to be supplied to the display panel and the data driving part;
a voltage line wired between an output terminal of the power generation part and the display panel, the voltage line to transmit a voltage output from the power generation part to the display panel; and
a power control part for controlling the voltage line, the power control part to block the voltage line to prevent the voltage from being supplied to the display panel, when a threshold voltage of an organic light emitting diode included in a subpixel is sensed.

5. The organic light emitting display of claim 4 , wherein the power control part turns off a switch to disconnect the voltage line wired between the output terminal of the power generation part and the display panel, when the threshold voltage of the organic light emitting diode included in the subpixel is sensed.

6. The organic light emitting display of claim 4 , wherein the power control part is turned on or turned off in response to a power control signal supplied from a timing control part for controlling the data driving part.

Assignees

• Lg Display Co Ltd

Inventors

• Park Jiwoong

Classifications

• G09G2320/045

  Compensation of drifts in the characteristics of light emitting or modulating elements · CPC title

• G09G2320/0295

  by monitoring each display pixel · CPC title

• G09G2320/0223

  Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes · CPC title

• G09G2300/0842

  forming a memory circuit, e.g. a dynamic memory with one capacitor · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title