Method for increasing durability of organic light emitting diode panel

• US 7,112,928 B2
• Filed: 03/03/2005
• Issued: 09/26/2006
• Est. Priority Date: 05/10/2004
• Status: Active Grant

• Current Assignee: Magnachip Semiconductor Limited (Magnachip Semiconductor)
• Original Assignee: Magnachip Semiconductor Limited (Magnachip Semiconductor)
• Inventors: Yoo, Dae-Young
• Primary Examiner(s): Philogene, Haissa
• Application Number:
  US11/072,839
• Publication Number:
  US 20050248286A1
• Time in Patent Office: 572 Days
• Field of Search: 3151692-1694, 345/36, 345/39, 345/42, 345/77, 345/82, 345/84, 345/212, 345/214
• US Class Current: 315/169.3
• CPC Class Codes: G09G 2320/046 Dealing with screen burn-in prevention or compensation of the effects thereof
• CPC Class Codes: G09G 3/3275 Details of drivers for data electrodes
• CPC Class Codes: G09G 5/346 for systems having a bit-mapped display memory

Abstract

An organic light emitting diode (OLED) panel device includes an OLED panel for displaying an image data and an OLED panel operation circuit for outputting the image data to the OLED panel and performing a screen saving operation without a memory access in order to increase a durability of the OLED panel. A method for operating an OLED panel device includes the steps of outputting an image data transmitted from a memory, performing a screen saving operation without a memory access in order to increase a durability of the OLED panel and displaying the image data or the screen saving operation via one of the steps above described.

Claims

1. An organic light emitting diode (OLED) panel device comprising:

an OLED panel for displaying an image data; and

an OLED panel operation circuit for outputting the image data to the OLED panel and performing a screen saving operation without a memory access in order to increase a durability of the OLED panel.

2. The OLED panel device as recited in claim 1, wherein the OLED panel operation circuit includes:

a memory for storing the image data constituted with plural line data;

a first display latch for latching a first line data transmitted from the memory;

a second display latch for latching a second line data to thereby output the second line data to the OLED panel;

a first decoding means for decoding a first horizontal address to thereby transmit each pixel data of the first line data latched in the first display latch;

a second decoding means for decoding a second horizontal address to thereby transmit each pixel data transmitted from the first decoding means to a predetermined position of the second display latch as the second line data; and

a controller for generating the first horizontal address including a floating signal for preventing a transmission of a pixel data and a pixel address signal for transmitting a pixel data and the second horizontal address.

3. The OLED panel device as recited in claim 2, wherein the controller generates enable signals each for enabling controls the enables of the first and the second latches.

4. The OLED panel device as recited in claim 2, wherein the OLED panel operation circuit further includes a data bus for transmitting the pixel data outputted from the first decoder to the second decoder and.

5. The OLED panel device as recited in claim 2, wherein the controller further generates control signals including a reset signal for outputting a ground voltage and a data signal for transmitting each pixel data in case when the pixel data is transmitted and for replacing the pixel data in case when the pixel data is not transmitted.

6. A method for operating an organic light emitting diode (OLED) panel device comprising the steps of:

(a) outputting an image data transmitted from a memory;

(b) performing a screen saving operation without a memory access in order to increase a durability of the OLED panel; and

(c) displaying the image data or the screen saving operation via one of the step (a) and the step (b).

7. The method as recited in claim 6, wherein the step

(a) includes:

(a1) latching a first line data transmitted from the memory;

(a2) decoding a first horizontal address to thereby transmit each pixel data of the first line data; and

(a3) decoding a second horizontal address to thereby latch each transmitted pixel data to a predetermined position of a second display latch as the image data.

8. The method as recited in claim 6, wherein the step

(b) includes:

(b1) decoding a first horizontal address to thereby transmit each pixel data of a first line data latched in a first display latch;

(b2) transmitting each pixel data of the first line data to a second display latch in response to control signals outputted from a controller; and

(b3) decoding a second horizontal address to thereby latch each transmitted pixel data to a predetermined position of a second display latch.

9. The method as recited in claim 8, wherein the first horizontal address includes a floating signal and a pixel address signal.

10. The method as recited in claim 9, wherein the floating signal is for preventing a transmission of a pixel data.

11. The method as recited in claim 9, wherein the address signal is for transmitting a pixel data.

12. The method as recited in claim 8, wherein the control signals includes a reset signal and a data signal.

13. The method as recited in claim 12, wherein the reset signal is for outputting a ground voltage.

14. The method as recited in claim 12, wherein in the case when a pixel data is transmitted, the data signal is for transmitting the pixel data.

15. The method as recited in claim 12, wherein in the case when a pixel data is not transmitted, the data signal is for replacing the pixel data.