Organic light emitting diode display and image compensation method

Patent metadata

Field	Value
Publication number	US-9466241-B2
Application number	US-201314058628-A
Country	US
Kind code	B2
Filing date	Oct 21, 2013
Priority date	Jun 11, 2013
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

An organic light emitting diode (OLED) display includes a substrate and a display unit. The substrate includes a flat portion and a curved portion. The display unit includes pixels configured to display an image. At least some of the pixels are disposed in association with the flat portion and at least some of the pixels are disposed in association with the curved portion. The display unit includes first driving power lines connected to the pixels disposed in association with the flat portion and second driving power lines connected to the pixels disposed in association with the curved portion. The first driving power lines are configured to transmit a first power source voltage and the second driving power lines are configured to transmit a second power source voltage. The first power source voltage and the second power source voltage are different.

First claim

What is claimed is:

1. An organic light emitting diode (OLED) display, comprising:
a substrate comprising a flat portion and a curved portion; and
a display unit comprising pixels configured to display an image, at least some of the pixels being disposed in association with the flat portion and at least some of the pixels being disposed in association with the curved portion,
wherein:
the display unit comprises first driving power lines connected to the pixels disposed in association with the flat portion and second driving power lines connected to the pixels disposed in association with the curved portion;
the first driving power lines are configured to transmit a first power source voltage and the second driving power lines are configured to transmit a second power source voltage, the first power source voltage and the second power source voltage being different;
the first driving power lines and the second driving power lines are connected to a power supply unit; and
the power supply unit is connected to a memory configured to store color coordinate correction information; and
the color coordinate correction information stored in the memory comprises at least one current-voltage-color coordinate relative function value for a power source voltage.

2. The OLED display of claim 1 , wherein the power supply unit is configured to:
receive the color coordinate correction information stored in the memory;
generate a power source voltage based on the color coordinate correction information; and
output the power source voltage to the second driving power line.

3. The OLED display of claim 2 , wherein the pixels disposed in the curved portion are configured to emit lateral color coordinates substantially equalized with frontal color coordinates emitted by pixels disposed in association with the flat portion based on reception of the power source voltage via the second driving power line.

4. The OLED display of claim 1 , further comprising:
first data lines disposed in association with the flat portion;
second data lines disposed in association with the curved portion; and
a data driver connected to the first data lines and the second data lines,
wherein the data driver is configured to receive the color coordinate correction information stored in the memory.

5. The OLED display of claim 4 , wherein the color coordinate correction information stored in the memory further comprises at least one current-voltage-color coordinate relative function value for a data voltage.

6. The OLED display of claim 5 , wherein:
the power supply unit is configured to apply a power source voltage to the second driving power lines based on the at least one current-voltage-color coordinate relative function value for a power source voltage; and
the data driver is configured to apply a data voltage to a second data line based on the at least one current-voltage-color coordinate relative function value for a data voltage.

7. The OLED display of claim 6 , wherein pixels disposed in the curved portion are configured to emit lateral color coordinates substantially equalized with frontal color coordinates emitted by pixels disposed in association with the flat portion based on reception of the power source voltage via the second driving power line and reception of the data voltage via the second data line.

8. An image compensating method, comprising:
determining color coordinate correction information for a first pixel disposed in association with a curved portion of a display device to equalize lateral color coordinates of the first pixel with frontal color coordinates of a second pixel disposed in association with a flat portion of the display device;
supplying a first power source voltage to the second pixel; and
supplying a second power source voltage to the first pixel based on the color coordinate correction information,
wherein:
the first power source voltage and the second power source voltage are different;
the color coordinate correction information is stored in a memory of the display device;
determining the color coordinate correction information comprises retrieving the color coordinate correction information from the memory, the color coordinate correction information comprising at least one current-voltage-color coordinate relative function value for a power source voltage; and
the second power source voltage is supplied to the first pixel via a first driving power line disposed in the curved portion of the display device based on the at least one current-voltage-color coordinate relative function value for a power source voltage.

9. The image compensating method of claim 8 , wherein the color coordinate correction information relates to a difference between frontal color coordinates of the second pixel and lateral color coordinates of the second pixel.

10. The image compensating method of claim 8 , wherein the color coordinate correction information further comprises at least one current-voltage-color coordinate relative function value for a data voltage.

11. The image compensating method of claim 10 , wherein:
the second power source voltage is supplied to the first pixel via a first driving power line disposed in the curved portion of the display device based on the at least one current-voltage-color coordinate relative function value for a power source voltage; and
a data voltage is supplied to the first pixel via a first data line disposed in the curved portion of the display device based on the at least one current-voltage-color coordinate relative function value for a data voltage.

12. The method of claim 8 , wherein the first power source voltage is supplied to the second pixel via a second driving power line disposed in the flat portion of the display device.

13. The method of claim 11 , wherein the first power source voltage is supplied to the second pixel via a second driving power line disposed in the flat portion of the display device.

14. The method of claim 13 , wherein another data voltage is supplied to the second pixel via a second data line disposed in the flat portion of the display device.

15. The method of claim 8 , further comprising:
measuring the frontal color coordinates of the second pixel;
measuring the lateral color coordinates of the second pixel;
determining the color coordinate correction information based on a difference between the frontal color coordinates of the second pixel and the lateral color coordinates of the second pixel.

16. The method of claim 15 , wherein the frontal color coordinates and the lateral color coordinates are measured using a digital photometer.

Assignees

• Samsung Display Co Ltd

Inventors

• Jeong Chul-Woo
• Park Soon-Ryong
• Jung Woo-Suk
• So Jung-Ho
• Kim Tae-Eun

Classifications

• 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

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G3/3233 Primary

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

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title

• G09G2380/02

  Flexible displays · CPC title