DISPLAY CONTROL SYSTEM OF A DISPLAY PANEL AND CONTROL METHOD THEREOF

Abstract

When electric current is provided to a scan line of a display panel, electric current flowing from an initial end to a final end of the scan line is gradually reduced because of resistance consumption, resulting in lower brightness on both left and right sides of the display panel. Therefore, data line driving signals provided to the display panel are compensated for solving such a problem.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is block diagram of a display control system according to the prior art.

FIG. 2 is a schematic diagram of a display panel of the display control system shown in FIG. 1.

FIG. 3 and FIG. 4 respectively illustrate the relationship between the distance and the magnitude of the currents flowing through the scan lines shown in FIG. 2.

FIG. 5 is a block diagram of a first embodiment display control system according to the present invention.

FIG. 6 is a block diagram of a second embodiment display control system of the present invention.

FIG. 7 illustrates the compensation for the reductions of currents shown in FIG. 3.

FIG. 8 illustrates the compensation for the reductions of currents shown in FIG. 4.

FIG. 9 is a timing diagram of data line driving signals according to the prior art.

FIG. 10 is a timing diagram of data line driving signals according to the present invention.

Claims

1. A display control system of a display panel, the display control system comprising: an image control circuit for generating a data signal and a scan signal;a compensation circuit coupled to the image control circuit for generating a compensation signal according to the distribution and magnitude of currents flowing through scan lines of the display panel; anda driver circuit coupled to the image control circuit and the compensation circuit for outputting data line driving signals to data lines of the display panel according to the compensation signal and the data signal and for outputting scan line driving signals to the scan lines of the display panel according to the scan signal to drive the display panel to display images.

2. The display control system of claim 1 further comprising a current meter coupled between the display panel and the image control circuit for measuring the distribution and the magnitude of the currents flowing through the scan lines of the display panel.

3. The display control system of claim 1 wherein the display panel is an organic light emitting diode (OLED) display panel.

4. A flat display comprising: a display panel for displaying images; anda display control system comprising: an image control circuit coupled to the display panel for generating a data signal and a scan signal;a compensation circuit coupled to the image control circuit for generating a compensation signal according to the distribution and magnitude of currents flowing through scan lines of the display panel; anda driver circuit coupled to the display panel, the image control circuit, and the compensation circuit for outputting data line driving signals to data lines of the display panel according to the compensation signal and the data signal and for outputting scan line driving signals to the scan lines of the display panel according to the scan signal to drive the display panel to display images.

5. The flat display of claim 4 further comprising a current meter coupled between the display panel and the image control circuit for measuring the distribution and the magnitude of the currents flowing through the scan lines of the display panel.

6. The flat display of claim 4 wherein the display panel is an organic light emitting diode (OLED) display panel.

7. A display control system of a display matrix, the display control system comprising: an image control circuit for generating a data signal and a scan signal;a compensation circuit for generating a compensation signal according to a predetermined look-up table; anda driver circuit coupled to the image control circuit and the compensation circuit for outputting data line driving signals to data lines of the display matrix according to the compensation signal and the data signal and for outputting scan line driving signals to scan lines of the display matrix according to the scan signal to drive the display matrix to display images.

8. The display control system of claim 7 wherein the display matrix is an organic light emitting diode (OLED) matrix.

9. The display control system of claim 7 wherein the look-up table is generated according to the distribution and the magnitude of currents flowing through the scan lines of the display matrix.

10. A flat display comprising: a display panel for displaying images; anda display control system comprising: an image control circuit coupled to the display panel for generating a data signal and a scan signal;a compensation circuit coupled to the image control circuit for generating a compensation signal according to a predetermined look-up table; anda driver circuit coupled to the image control circuit and the compensation circuit for outputting data line driving signals to data lines of the display panel according to the compensation signal and the data signal and for outputting scan line driving signals to scan lines of the display panel according to the scan signal to drive the display panel to display images.

11. The flat display of claim 10 wherein the look-up table is generated according to the distribution and the magnitude of currents flowing through the scan lines of the display panel.

12. The flat display of claim 10 wherein the display panel is an organic light emitting diode (OLED) display panel.

13. A method for compensating driving signals of a display panel, the method comprising: generating a data signal and a scan signal;generating a compensation signal according to the distribution and magnitude of currents flowing through scan lines of the display panel; andoutputting data line driving signals to data lines of the display panel according to the compensation signal and the data signal and outputting scan line driving signals to the scan lines of the display panel according to the scan signal.

14. The method of claim 13 further comprising measuring the distribution and the magnitude of the currents flowing through the scan lines of the display panel.

15. The method of claim 13 wherein the display panel is an organic light emitting diode (OLED) matrix.

16. A method for compensating driving signals of a display panel, the method comprising: generating a data signal and a scan signal;generating a compensation signal according to a predetermined look-up table; andoutputting data line driving signals to data lines of the display panel according to the compensation signal and the data signal and outputting scan line driving signals to scan lines of the display panel according to the scan signal.

17. The method of claim 16 wherein the display panel is an organic light emitting diode (OLED) matrix.

18. The method of claim 16 wherein the look-up table is generated according to the distribution and the magnitude of currents flowing through the scan lines of the display panel.