Organic light emitting diode display device and display system including the same

Patent metadata

Field	Value
Publication number	US-2016240146-A1
Application number	US-201514809099-A
Country	US
Kind code	A1
Filing date	Jul 24, 2015
Priority date	Feb 16, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

An organic light emitting diode (OLED) display device includes a display panel including a plurality of pixel rows; a driving circuit configured to: provide a first display data to the plurality of pixel rows in a normal mode; provide a second display data including black data to the plurality of pixel rows in a dimming mode, in response to a mode signal; and decrease a second luminance of the display panel in the dimming mode to a level lower than a first luminance of the display panel in the normal mode; and a power supply configured to apply a lower power supply voltage and a high power supply voltage to the display panel, the power supply providing the mode signal.

First claim

What is claimed is:

1 . An organic light emitting diode (OLED) display device, comprising:
a display panel comprising a plurality of pixel rows; a driving circuit configured to:
provide a first display data to the plurality of pixel rows in a normal mode;
provide a second display data comprising black data to the plurality of pixel rows in a dimming mode, in response to a mode signal; and
decrease a second luminance of the display panel in the dimming mode to a level lower than a first luminance of the display panel in the normal mode; and
a power supply configured to apply a lower power supply voltage and a high power supply voltage to the display panel, the power supply providing the mode signal.

2 . The OLED display device of claim 1 , wherein the plurality of pixel rows comprise a plurality of odd-numbered pixel rows and a plurality of even-numbered pixel rows that are alternately arranged with respect to each other,
wherein each of the plurality of odd-numbered pixel rows comprises first pixels and second pixels that are alternately arranged with respect to each other, wherein each of the plurality of even-numbered pixel rows comprises third pixels and fourth pixels that are alternately arranged with respect to each other, and wherein each first pixel comprises a first sub pixel configured to emit a first color light and a second sub pixel configured to emit a second color light, each second pixel comprising a third sub pixel configured to emit a third color light and the second sub pixel configured to emit the second color light, each third pixel comprising the third sub pixel and the second sub pixel and each fourth pixel comprising the first sub pixel and the second sub pixel.

3 . The OLED display device of claim 2 , wherein the driving circuit is configured to provide black data to the second sub pixels of the second pixel and the fourth pixel in the dimming mode.

4 . The OLED display device of claim 2 , wherein the driving circuit, in the diming mode, is configured to:
provide black data to the second sub pixels of the second pixel and the fourth pixel during a k-th frame period (k is an integer greater than 0); and provide the black data to the second sub pixels of the first pixel and the third pixel during a (k+1)-th frame period.

5 . The OLED display device of claim 2 , wherein the driving circuit, in the diming mode, is configured to:
provide black data to the second sub pixels of the second pixel and the third pixel during a k-th frame period (k is an integer greater than 0); and provide the black data to the second sub pixels of the first pixel and the fourth pixel during a (k+1)-th frame period.

6 . The OLED display device of claim 2 , wherein the driving circuit, in the diming mode, is configured to:
provide black data to the pixels in the even-numbered pixel rows during a k-th frame period (k is an integer greater than 0); and provide the black data to the pixels in the odd-numbered pixel rows during a (k+1)-th frame period.

7 . The OLED display device of claim 2 , wherein the driving circuit, in the diming mode, is configured to:
provide black data to the second pixels and the fourth pixels during a k-th frame period (k is an integer greater than 0); and provide the black data to the first pixels and the third pixels during a (k+1)-th frame period.

8 . The OLED display device of claim 2 , wherein the first color light is a red color light, the second color light is a green color light, and the third color light is a blue color light.

9 . The OLED display device of claim 1 , wherein the plurality of pixel rows comprise a plurality of odd-numbered pixel rows and a plurality of even-numbered pixel rows that are alternately arranged with respect to each other,
wherein each of the plurality of odd-numbered pixel rows comprises first pixels and second pixels that are alternately arranged with respect to each other, wherein each of the plurality of even-numbered pixel rows comprises third pixels and fourth pixels that are alternately arranged with respect to each other, and wherein each of the first through fourth pixels comprises a first sub pixel configured to emit a first color light, a second sub pixel configured to emit a second color light, and a third sub pixel configured to emit a third color light.

10 . The OLED display device of claim 9 , wherein the driving circuit, in the diming mode, is configured to:
provide black data to a same pixel of the first pixel and the third pixel during a k-th frame period (k is an integer greater than 0); and provide the black data to a same sub pixel of the second pixel and the fourth pixel during a (k+1)-th frame period.

11 . The OLED display device of claim 10 , wherein the same sub pixel is one of the first through third sub pixels.

12 . The OLED display device of claim 9 , wherein the driving circuit, in the diming mode, is configured to:
provide black data to a same pixel of the first pixel and the fourth pixel during a k-th frame period (k is an integer greater than 0); and provide the black data to the same sub pixel of the second pixel and the third pixel during a (k+1)-th frame period.

13 . The OLED display device of claim 12 , wherein the same sub pixel is one of the first through third sub pixels.

14 . The OLED display device of claim 9 , wherein the driving circuit, in the diming mode, is configured to:
provide black data to the first pixel and the fourth pixel during a k-th frame period (k is an integer greater than 0); and provide the black data to the second pixel and the third pixel during a (k+1)-th frame period.

15 . The OLED display device of claim 9 , wherein the first color light is a red color light, the second color light is a green color light and the third color light is a blue color light.

16 . The OLED display device of claim 2 , wherein the driving circuit comprises:
a scan driver configured to provide scan signals to the sub pixels through a plurality of scan lines; a data driver configured to provide data voltages corresponding to the first display data or the second display data to the sub pixels through a plurality of data lines; an emission driver configured to provide emission control signals to the sub pixels through a plurality of a plurality of emission control lines to adjust non-emission time of each sub pixels in the dimming mode; a timing controller configured to control the scan driver, the data driver, the emission driver and the power supply, wherein the timing controller is configured to process an input image data to generate the first display data or the second display data in response to the mode signal.

17 . The OLED display device of claim 16 , wherein each of the sub pixels comprises:
a switching transistor comprising a first terminal coupled to each of the data lines, a gate terminal coupled to each of the scan lines and a second terminal coupled to a first node; a storage capacitor between the high power supply voltage and the first node; a driving transistor comprising a first terminal coupled to the high power supply voltage, a gate terminal coupled to the first node and a second terminal; an emission transistor comprising a first terminal coupled to a second terminal of the driving transistor, a gate terminal configured to receive the emission control signal and a second terminal; and an OLED between the second terminal of the driving transistor and a lower power supply voltage.

18 . The OLED display device of claim 16 , wherein the timing controller compr

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jae-Sic
• Park Jin-Woo

Classifications

• G09G3/3258

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title

• G09G3/2003

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G09G2330/028

  Generation of voltages supplied to electrode drivers in a matrix display other than LCD · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title

• G09G2310/0262

  The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes · CPC title