Organic light emitting display device and repair method thereof

• US 10,276,078 B2
• Filed: 12/28/2015
• Issued: 04/30/2019
• Est. Priority Date: 12/29/2014
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, YoonJu, Kim, JeongHwan, Choi, SooHong, Shin, HongJae, Park, KwangMo, Song, JaYeon
• Primary Examiner(s): Boddie, William
• Assistant Examiner(s): Elnafia, Saifeldin E
• Application Number:
  US14/980,784
• Publication Number:
  US 20160189593A1
• Time in Patent Office: 1,219 Days
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/043 Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2330/08 Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
• CPC Class Codes: G09G 2330/10 Dealing with defective pixels
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3283 in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
• CPC Class Codes: G09G 3/3291 in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/861 Repairing

Abstract

An organic light emitting display device and a method of repairing the device are discussed. According to an embodiment, the device includes a display panel having pixels, each including an OLED in every pixel area defined as scan and data lines intersect with each other and having a repair structure in at least one of horizontal and vertical directions between adjacent pixels by one or more repair lines; a timing controller configured to generate compensation data when a dark spot is generated in one of the plurality of pixels of the display panel, and adjust a magnitude of image data according to the compensation data; and a data driver configured to adjust a magnitude of a data voltage according to the image data adjusted in magnitude, and output the data voltage adjusted in magnitude to the data lines.

Claims

1. An organic light emitting display device comprising:

a display panel configured to include a plurality of pixels, each pixel including an organic light emitting diode (OLED) in every pixel area defined as a plurality of scan lines and a plurality of data lines intersect with each other and having a repair structure in a horizontal direction by one or more repair lines between two or more adjacent pixels among the plurality of pixels;

a timing controller configured to generate compensation data when a dark spot is generated in one of the plurality of pixels of the display panel, and adjust a magnitude of image data according to the compensation data; and

a data driver configured to adjust a magnitude of a data voltage according to the image data adjusted in magnitude, and output the data voltage adjusted in magnitude to the plurality of data lines,

wherein the two or more adjacent pixels include a first pixel and a second pixel adjacent to each other in the horizontal direction, and the first pixel and the second pixel each include subpixels R, G, B, and W,

wherein the one or more repair lines include a plurality of horizontal repair lines connecting the subpixels R, G, B, and W of the first pixel and the subpixels R, G, B, and W of the second pixel in a corresponding manner, and

wherein the plurality of horizontal repair lines extend from an end of an anode electrode of the OLED of a corresponding pixel to overlap a source electrode of a driving thin film transistor (TFT) of a horizontally adjacent pixel.

2. The organic light emitting display device of claim 1, wherein the plurality of horizontal repair lines comprise:

a first horizontal repair line connecting each of the subpixel R of the first pixel and the second pixel;

a second horizontal repair line connecting each of the subpixel G of the first pixel and the second pixel;

a third horizontal repair line connecting each of the subpixel B of the first pixel and the second pixel; and

a fourth horizontal repair line connecting each of the subpixel W of the first pixel and the second pixel.

3. The organic light emitting display device of claim 1, wherein the adjacent pixels are the first pixel, the second pixel and a third pixel, and the first pixel and the third pixel adjacent to each other in the vertical direction, and the first pixel, the second pixel, and the third pixel each include subpixels R, G, B, and W, and

the one or more repair lines comprise:

one horizontal repair line connecting one of subpixels R, G, B, and W of the first pixel and one of subpixels R, G, B, and W of the second pixel corresponding thereto; and

a plurality of vertical repair lines connecting the subpixels R, G, B, and W of the first pixel and the subpixels R, G, B, and W of the third pixel in a corresponding manner,

wherein the one horizontal repair line overlaps a source electrode of a driving TFT of the first pixel and a source electrode of a driving TFT of the second pixel below anode electrodes of the OLEDs of the first pixel and the second pixel, and

wherein the plurality of vertical repair lines extend from the end of the anode electrode of the OLED of the first pixel to overlap a source electrode of the driving TFT of the third pixel.

4. The organic light emitting display device of claim 1, wherein each of the plurality of horizontal repair lines is integral to, formed of a same material and formed on a same layer as the anode electrode of the corresponding OLED.

5. The organic light emitting display device of claim 1, further comprising:

first and second protective layers disposed between source electrodes and anode electrodes of the first and second pixels,

wherein the plurality of horizontal repair lines are disposed between the first and second protective layers.

6. An organic light emitting display device comprising:

a display panel configured to include a plurality of pixels each including an organic light emitting diode (OLED) in every pixel area defined as a plurality of scan lines and a plurality of data lines intersect with each other and having a repair structure in a vertical direction by one or more repair lines between two or more adjacent pixels among the plurality of pixels;

a timing controller configured to generate compensation data when a dark spot is generated in one of the plurality of pixels of the display panel, and adjust a magnitude of image data according to the compensation data; and

a data driver configured to adjust a magnitude of a data voltage according to the image data adjusted in magnitude and output the data voltage adjusted in magnitude to the plurality of data lines,

wherein the adjacent pixels include a first pixel and a second pixel adjacent to each other in the vertical direction, and the first pixel and the second pixel each include subpixels R, G, B, and W, and

the one or more repair lines include a plurality of vertical repair lines connecting the subpixels R, G, B, and W of the first pixel and subpixels R, G, B, and W of the second pixel in a corresponding manner, and

wherein the plurality of vertical repair lines extend from an end of an anode electrode of the OLED of a corresponding pixel to overlap a source electrode of a driving thin film transistor (TFT) of a vertically adjacent pixel.

7. The organic light emitting display device of claim 6, wherein the plurality of vertical repair lines comprise:

a first vertical repair line connecting each of the subpixel R of the first pixel and the second pixel;

a second vertical repair line connecting each of the subpixel G of the first pixel and the second pixel;

a third vertical repair line connecting each of the subpixel B of the first pixel and the second pixel; and

a fourth vertical repair line connecting each of the subpixel W of the first pixel and the second pixel.

8. The organic light emitting display device of claim 6, wherein each of the plurality of vertical repair lines is integral to, formed of a same material and formed on a same layer as the anode electrode of the corresponding OLED.

9. The organic light emitting display device of claim 6, further comprising:

first and second protective layers disposed between source electrodes and anode electrodes of the first and third pixels,

wherein the plurality of vertical repair lines are disposed between the first and second protective layers.