Organic light emitting display panel

Patent metadata

Field	Value
Publication number	US-9262952-B2
Application number	US-201314025593-A
Country	US
Kind code	B2
Filing date	Sep 12, 2013
Priority date	Jun 3, 2013
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

Provided is an organic light emitting display panel. The organic light emitting display panel includes a pixel unit including a plurality of pixels I displaying mutually different colors, a plurality of data pads electrically connected to wirings extending from the data lines, each of the plurality of data pads being connected to corresponding data lines, respectively, and an array test unit applying an array test signal to the plurality of pixels of the pixel unit, and sensing a current outputted from the plurality of pixels. The array test unit includes an array test pad electrically connected to a plurality of data pads through a plurality of array test switches.

First claim

What is claimed is:

1. An organic light emitting display panel comprising:
a pixel unit comprising a plurality of pixels displaying mutually different colors;
a plurality of data pads electrically connected to wirings extending from the data lines, each of the plurality of data pads being connected to corresponding data lines, respectively; and
an array test unit applying an array test signal to the plurality of pixels of the pixel unit, and sensing a current outputted from the plurality of pixels,
wherein the array test unit comprises an array test pad electrically connected to a plurality of data pads through a plurality of array test switches.

2. The organic light emitting display panel of claim 1 , wherein the array test switches form a demultiplexer having the plurality of array test switches, each of the array test switches being connected between one of the plurality of data pads and the array test pads.

3. The organic light emitting display panel of claim 2 , wherein a gate of each of the plurality of array test switches is connected to one of a plurality of wirings supplying a plurality of array test control signals.

4. The organic light emitting display panel of claim 3 , wherein the plurality of array test switches comprises:
first array test switches, gates of which are connected in common to a wiring supplying a first array test control signal;
second array test switches, gates of which are connected in common to a wiring supplying a second array test control signal;
third array test switches, gates of which are connected in common to a wiring supplying a third array test control signal; and
fourth array test switches, gates of which are connected in common to a wiring supplying a fourth array test control signal.

5. The organic light emitting display panel of claim 2 , wherein the demultiplexer comprises a plurality of switch groups connecting the same number of sequential data pads as a number of array test control signals to one array test pad, and
wherein each switch group comprises a plurality of array test switches whose gates are connected to the wirings supplying the respective array test control signals and the plurality of array test switches of the each switch group are sequentially turned on in response to the array test control signal.

6. The organic light emitting display panel of claim 2 , further comprising a wiring test unit testing short-circuits and open-circuits of the wirings extending from the data lines.

7. The organic light emitting display panel of claim 6 , wherein the wiring test unit comprises a plurality of wiring test switches, gates of which are connected in common to a wiring supplying a wiring test control signal, first terminals of which are connected to the array test pads, respectively, and second terminals of which receive a wiring test signal.

8. The organic light emitting display panel of claim 6 , wherein the wiring test unit maintains an off state while the array test unit is performing an array test.

9. The organic light emitting display panel of claim 1 , further comprising a data switch unit selectively applying data signals outputted from the data pads to the pixel column of the pixel unit.

10. The organic light emitting display panel of claim 1 , further comprising a data drive unit bonded to the data pads by using a chip-on-glass (COG) method and applying data signals to the data lines.

11. An organic light emitting display panel comprising:
a plurality of array test pads configured to be connected to probe pins of an array test apparatus and receiving an array test signal to test a pixel circuit array; and
a demultiplexer disposed between a plurality of data pads connected to respective wirings extending from data lines of the pixel unit and the array test pads and selectively applying the array test signal provided from the array test pad to a pixel of the pixel unit through the data pad.

12. The organic light emitting display panel of claim 11 , wherein the demultiplexer comprises a plurality of array test switches, in which a gate of each array test switch is connected to one of a plurality of wirings supplying a plurality of array test control signals, a first terminal of each array test switch is connected to one of the plurality of data pads, and a second terminal of each array test switch is connected to one of the plurality of array test pads.

13. The organic light emitting display panel of claim 12 , wherein the plurality of array test switches comprises:
first array test switches, gates of which are connected in common to a wiring supplying a first array test control signal;
second array test switches, gates of which are connected in common to a wiring supplying a second array test control signal;
third array test switches, gates of which are connected in common to a wiring supplying a third array test control signal; and
fourth array test switches, gates of which are connected in common to a wiring supplying a fourth array test control signal.

14. The organic light emitting display panel of claim 11 , wherein the demultiplexer comprises a plurality of switch groups connecting the same number of sequential data pads as a number of the array test control signals to one array test pad, and
wherein each switch group comprises a plurality of array test switches whose gates are connected to wirings supplying the respective array test control signals and the plurality of array test switches of the each switch group are sequentially turned on in response to the array test control signal.

15. The organic light emitting display panel of claim 11 , wherein the array test pad has a larger size than that of the data pad and an interval between the array test pads is wider than an interval of the data pads.

16. The organic light emitting display panel of claim 11 , further comprising a wiring test unit testing shorts and opens of the wirings extended from the data lines.

17. The organic light emitting display panel of claim 16 , wherein the wiring test unit comprises a plurality of wiring test switches, gates of which are connected in common to a wiring supplying a wiring test control signal, first terminals of which are connected to the array test pads, respectively, and second terminals of which receive a wiring test signal.

18. The organic light emitting display panel of claim 16 , wherein the wiring test unit maintains an off state while the array test unit is performing an array test.

19. The organic light emitting display panel of claim 11 , further comprising a data switch unit selectively applying data signals outputted from the data pads to the pixel column of the pixel unit.

20. The organic light emitting display panel of claim 11 , further comprising a data drive unit bonded to the data pads by using a COG method and applying data signals to the data lines.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Ji-Hye
• Ka Ji-Hyun

Classifications

• H10P74/27

  Structural arrangements therefor · CPC title

• G01R31/2632

  for testing diodes · CPC title

• G09G2310/0297

  Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns · CPC title

• G09G3/3233

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

• G09G2300/0852

  being a dynamic memory with more than one capacitor · CPC title