Display device

Patent metadata

Field	Value
Publication number	US-2016189644-A1
Application number	US-201514699616-A
Country	US
Kind code	A1
Filing date	Apr 29, 2015
Priority date	Dec 29, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

A display device is disclosed. In one aspect, the display device includes a display panel including a display area and a non-display area surrounding the display area. The display device also includes a plurality of active pixels formed in the display area extending in first and second directions as a matrix, a plurality of dummy pixels formed in the non-display area and extending in the second direction, a repair test line and one or more active pixel test lines formed in the non-display area and extending in the first direction, a plurality of scan lines electrically connected to the active pixels and the dummy pixels and extending in the first direction, a plurality of data lines electrically connected to the active pixels and extending in the second direction, and at least one dummy data line electrically connected to the dummy pixels and extending in the second direction.

First claim

What is claimed is:

1 . A display device, comprising:
a display panel including a display area configured to display an image and a non-display area surrounding the display area; a plurality of active pixels formed in the display area extending in first and second directions as a matrix; a plurality of dummy pixels formed in the non-display area and extending in the second direction; a repair test line and one or more active pixel test lines formed in the non-display area and extending in the first direction; a plurality of scan lines electrically connected to the active pixels and the dummy pixels and extending in the first direction; a plurality of data lines electrically connected to the active pixels and extending in the second direction; at least one dummy data line electrically connected to the dummy pixels and extending in the second direction; a plurality of repair lines electrically connected to the dummy pixels and extending in the first direction, wherein at least one of the dummy pixels is electrically connected to at least one of the active pixels via at least one of the repair lines; and a plurality of switching elements including a plurality of first switching elements configured to electrically connect the dummy data line to the repair test lines and a plurality of second switching elements configured to electrically connect each of the data lines to one of the active pixel test lines.

2 . The display device of claim 1 , further comprising a gate test line formed in the non-display area and extending in the first direction, wherein the gate test line is electrically connected to the switching elements, and wherein the switching elements are configured to switch on or off based on a voltage signal applied to the gate test line.

3 . The display device of claim 2 , wherein the switching elements include P-channel metal oxide semiconductor (PMOS) transistors, and wherein each of the switching elements includes a gate terminal electrically connected to the test gate line, a drain terminal electrically connected to the dummy data line or one of the data lines, and a source terminal electrically connected to the repair test line or one of the active pixel test lines.

4 . The display device of claim 1 , wherein the active pixel repair test lines include red (R), green (G) and blue (B) test lines.

5 . The display device of claim 1 , wherein each of the active pixels includes a pixel circuit electrically connected to one of the data lines and a light-emitting element configured to receive a driving current from the pixel circuit, and wherein the pixel circuit and the light-emitting element are electrically connected via a selectively cuttable line.

6 . The display device of claim 5 , wherein at least one of the active pixels includes i) at least one first repair portion configured to be cut so as to block a driving current applied from the pixel circuit to the light-emitting element and ii) at least one second repair portion configured to short the light-emitting element and the repair line and configured to transfer a driving current to the light-emitting element from the at least one of dummy pixels.

7 . The display device of claim 6 , further comprising a data driver configured to i) respectively transmit a plurality of data signals to the data lines, ii) transmit a dummy data signal to the dummy data line, and iii) transmit at least one data signal to the at least one dummy pixel as the dummy data signal.

8 . The display device of claim 1 , further comprising a plurality of pads configured to electrically connect one of the dummy data line and the data lines to the switching elements.

9 . The display device of claim 8 , further comprising a data driver configured to respectively drive a plurality of data signals to the data lines, and drive a dummy data signal to the dummy data line, wherein the data driver is electrically connected to the dummy data line and the data lines via the pads.

10 . The display device of claim 9 , wherein the data driver is further configured to drive at least one data signal to the at least one dummy pixel as the dummy data signal.

11 . A display device, comprising:
a display panel including a display area configured to display an image and a non-display area surrounding the display area; a plurality of active pixels formed in the display area extending in the first and second directions as a matrix; a plurality of dummy pixels formed in the non-display area and extending in the second direction; a plurality of active pixel test lines formed in the non-display area and extending in the first and second directions; a plurality of scan lines electrically connected to the active pixels and extending in the first direction; a plurality of data lines electrically connected to the active pixels and extending in the second direction; at least one dummy data line electrically connected to the dummy pixels and extending in the second direction; a plurality of repair lines electrically connected to the dummy pixels and extending in the first direction, wherein at least one of the dummy pixels is electrically connected to at least one of the active pixels via at least one of the repair lines; and a plurality of switching elements including a plurality of first switching elements configured to electrically connect at least one of the dummy pixels to one of the active pixel test lines and a plurality of second switching elements configured to electrically connect each of the data lines to one of the active pixel test lines.

12 . The display device of claim 11 , further comprising a gate test line formed in the non-display area and extending in the first and second directions, wherein the gate test line is electrically connected to the switching elements, and wherein the switching elements are configured to switch on or off based on a voltage signal applied to the gate test line.

13 . The display device of claim 12 , wherein the switching elements include PMOS transistors, and wherein each of the switching elements includes a gate terminal electrically connected to the test gate line, a drain terminal electrically connected to the dummy data line or one of the data lines, and a source terminal electrically connected to the repair test line or one of the active pixel test lines.

14 . The display device of claim 11 , wherein the active pixel repair test lines include R, G and B test lines.

15 . The display device of claim 11 , wherein each of the active pixels includes a pixel circuit electrically connected to one of the data lines and a light-emitting element configured to receive a driving current from the pixel circuit, and wherein the pixel circuit and the light-emitting element are electrically connected via a selectively cuttable line.

16 . The display device of claim 15 , wherein at least one of the active pixels includes i) at least one first repair portion configured to be cut so as to block a driving current applied from the pixel circuit to the light-emitting element and ii) at least one second repair portion configured to short the light-emitting element and the repair line and configured to transfer a driving current to the light-emitting element from the at least one of dummy pixels.

17 . The display device of claim 16 , further comprising a data driver configured to i) respectively transmit a plurality of data signals to the data lines, ii) transmit a dummy data signal to the dummy data line, and iii) transmit at least one data signal to the at least one dummy pixel as the dummy data signal.

Assignees

• Samsung Display Co Ltd

Inventors

• So Dong Yoon
• Kim Tae Gon
• Park Kyong Tae
• Cho Sung Ho
• Cho Yu Hyun

Classifications

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G5/02

  characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} · CPC title

• G09G3/3611 Primary

  Control of matrices with row and column drivers · CPC title

• Y02D10/00

  Energy efficient computing, e.g. low power processors, power management or thermal management · CPC title

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title