Organic light-emitting diode (OLED) display

Patent metadata

Field	Value
Publication number	US-9520085-B2
Application number	US-201414220344-A
Country	US
Kind code	B2
Filing date	Mar 20, 2014
Priority date	Jul 9, 2013
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

An organic light-emitting diode (OLED) display is disclosed. In one aspect, the OLED display includes a substrate and odd and even-numbered pixels adjacent to each other in a column direction and respectively formed in odd and even-numbered rows. The OLED display also includes a common pixel driver connected to the odd and even-numbered pixels and driving each of the odd and even-numbered pixels. The OLED display further includes a selection unit selecting one of the odd and even-numbered pixels to be driven by the common pixel driver. The common pixel driver is formed in either the odd-numbered row or the even-numbered row.

First claim

What is claimed is:

1. An organic light-emitting diode (OLED) display, comprising:
a substrate;
a plurality of pixels formed over the substrate and arranged in rows and columns, wherein the pixels comprise a plurality of odd-numbered pixels and a plurality of even-numbered pixel formed to be adjacent to each other in a column direction and wherein the odd-numbered pixels are formed in odd-numbered rows and the even-numbered pixels are formed in even-numbered rows;
a common pixel driver connected to an odd-numbered pixel and an even-numbered pixel, wherein the common pixel driver is configured to alternately drive the odd-numbered pixel and the even-numbered pixel; and
a selector configured to select one of the odd-numbered pixel and the even-numbered pixel to be driven by the common pixel driver,
wherein the common pixel driver is formed in either the odd-numbered row or the even-numbered row, and
wherein the common pixel driver overlaps the pixels of either the odd-numbered row or the even-numbered row.

2. The OLED display of claim 1 , further comprising:
a scan line and a previous scan line respectively configured to apply a scan signal and a previous scan signal;
a data line and a driving voltage line crossing each of the scan line and the previous scan line, wherein the data line and the driving voltage line are respectively configured to apply a data signal and a driving voltage;
a first light emission control line and a second light emission control line respectively configured to apply a first light emission control signal and a second light emission control signal; and
a first OLED and a second OLED respectively formed in the odd-numbered pixels and the even-numbered pixels,
wherein the selector is configured to control one of the odd-numbered pixel and the even-numbered pixel to be driven by the common pixel driver based at least in part on one of the first light emission control signal or the second light emission control signal.

3. The OLED display of claim 2 , wherein the common pixel driver comprises:
a switching transistor connected to the scan line and the data line, wherein the switching transistor comprises a switching drain electrode;
a driving transistor connected to the switching drain electrode; and
a compensation transistor connected to the driving transistor and configured to compensate for a threshold voltage of the driving transistor.

4. The OLED display of claim 3 , wherein the selector comprises:
an odd-numbered operation control transistor and an even-numbered operation control transistor respectively configured to apply the driving voltage to the driving transistor based at least in part on the first and second light emission control signals, respectively; and
an odd-numbered light emission control transistor and an even-numbered light emission control transistor respectively configured to selectively apply the driving voltage to the first and second OLEDs based at least in part on the first and second light emission control signals, respectively.

5. The OLED display of claim 4 , wherein the odd-numbered light emission control transistor is formed between and electrically connected to the driving transistor and the first OLED and wherein the even-numbered light emission control transistor is formed between and electrically connected to the driving transistor and the second OLED.

6. The OLED display of claim 4 , wherein each of the odd-numbered operation control transistor and the even-numbered operation control transistor is formed between and electrically connected to the driving voltage line and the driving transistor.

7. The OLED display of claim 4 , further comprising an initialization voltage line configured to apply an initialization voltage, wherein the common pixel driver further comprises an initialization transistor configured to apply the initialization voltage to the driving transistor based at least in part on the previous scan signal, wherein the initialization transistor is formed between and electrically connected to the initialization voltage line and the driving transistor.

8. The OLED display of claim 3 , further comprising a third light emission control line configured to apply a third light emission control signal, wherein the selector comprises:
an operation control transistor configured to apply the driving voltage to the driving transistor based at least in part on the third light emission control signal; and
an odd-numbered light emission control transistor and an even-numbered light emission control transistor respectively configured to apply the driving voltage to the first and second OLEDs based at least in part on the first and second light emission control signals, respectively.

9. The OLED display of claim 8 , wherein the odd-numbered light emission control transistor is formed between and electrically connected to the driving transistor and the first OLED and wherein the even-numbered light emission control transistor is formed between and electrically connected to the driving transistor and the second OLED.

10. The OLED display of claim 8 , wherein the operation control transistor is formed between and electrically connected to the driving voltage line and the driving transistor.

11. The OLED display of claim 8 , further comprising an initialization voltage line configured to apply an initialization voltage, wherein the common pixel driver further comprises an initialization transistor configured to apply the initialization voltage to the driving transistor based at least in part on the previous scan signal, wherein the initialization transistor is formed between the initialization voltage line and the driving transistor.

12. An organic light-emitting diode (OLED) display, comprising:
a plurality of pixel dots arranged in rows and columns; and
a common pixel driver,
wherein each pixel dot comprises:
a first color pixel including i) a first color odd-numbered pixel and ii) a first color even-numbered pixel formed to be adjacent to each other in a column direction;
a second color pixel including a second color odd-numbered pixel and a second color even-numbered pixel; and
a third color pixel including a third color odd-numbered pixel and a third color even-numbered pixel,

wherein each of the odd-numbered pixels is formed in an odd-numbered row and each of the even-numbered pixels is formed in an even-numbered row;
wherein the common pixel driver is configured to drive the odd and even-numbered pixels of one of the first to third color pixels, and
wherein the common pixel driver is formed adjacent to the one of the color pixels and a color pixel neighboring the one of the color pixels, and
wherein the common pixel driver overlaps the pixels of either the odd-numbered row or the even-numbered row.

13. The OLED display of claim 12 , wherein the common pixel driver further comprises a first color common pixel driver, wherein the first color common pixel driver is configured to drive the odd and even-numbered pixels of the first color pixel, and wherein the first color common pixel driver is formed adjacent to the first color even-numbered pixel and ii) a position corresponding to a color pixel neighboring the first color even-numbered pixel.

14. The OLED display of claim 13 , wherein the common pixel driver further comprises a second color common pixel driver, wherein the second color common pixel driver is configured to drive the odd and even-numbered pixels of the second color pixel, and wherein the second color common pixel driver is formed adjacent to the second color odd-numbered pixel and a color pixel neighboring the second color odd-numbered p

Assignees

• Samsung Display Co Ltd

Inventors

• Ko Min Ho
• Choi Jae Won

Classifications

• G09G2300/0804

  Sub-multiplexed active matrix panel, i.e. wherein one active driving circuit is used at pixel level for multiple image producing elements · CPC title

• G09G2300/0452

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

• G09G3/32 Primary

  semiconductive, e.g. using light-emitting diodes [LED] · CPC title

• G09G2300/0819

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

• G09G2300/0814

  used for selection purposes, e.g. logical AND for partial update · CPC title