FLAT PANEL DISPLAY

• US 20090079669A1
• Filed: 07/23/2008
• Published: 03/26/2009
• Est. Priority Date: 09/26/2007
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Huang, Tzu-Chien, Hsu, Ting-Chang, Wang, Hsien-Chun
• Application Number:
  US12/177,888
• Publication Number:
  US 20090079669A1
• Time in Patent Office: Days
• US Class Current: 345/30
• CPC Class Codes: G09G 2310/0218 with collection of electrodes in groups for n-dimensional addressing
• CPC Class Codes: G09G 2310/0224 Details of interlacing
• CPC Class Codes: G09G 3/3677 suitable for active matrices only

Abstract

A flat panel display is provided. The flat panel display includes a display panel, a gate driver, a source driver and a signal switching unit. The gate driver outputs a gate signal. The signal switching unit turns on the first terminal and the second terminal thereof to deliver the gate signal to a first scan line during a preceding half period of a frame period. Moreover, the signal switching unit turns on the first terminal and the third terminal thereof during a rear half period of the frame period, so that the gate signal, which is previously delivered to the first scan line, is delivered to the second scan line at this time. In this way, the source driver drives the display panel in coordination with the gate signal delivered by the first and second scan lines.

Claims

1. A flat panel display, comprising:

a display panel, having a first scan line and a second scan line;

a gate driver, disposed at a side of the display panel and having at least an output terminal, wherein the gate driver outputs a gate signal through the output terminal;

a source driver, disposed at another side of the display panel and electrically connected to the display panel for driving the display panel in coordination with the gate signal; and

a signal switching unit, having a first terminal electrically connected to the output terminal of the gate driver, a second terminal electrically connected to the first scan line and a third terminal electrically connected to the second scan line, wherein the signal switching unit turns on the first terminal and the second terminal thereof during a preceding half period of a frame period and turns on the first terminal and the third terminal thereof during a rear half period of the frame period.

2. The flat panel display according to claim 1, wherein the signal switching unit comprises:

a first switch, having a first terminal electrically connected to the output terminal of the gate driver and a second terminal electrically connected to the first scan line, wherein the first switch is turned on during the preceding half period of the frame period;

a second switch, having a first terminal electrically connected to a control terminal of the first switch and a second terminal electrically connected to the first scan line, wherein the second switch is turned on during the rear half period of the frame period;

a third switch, having a first terminal electrically connected to the output terminal of the gate driver and a second terminal electrically connected to the second scan line, wherein the third switch is turned on during the rear half period of the frame period; and

a fourth switch, having a first terminal electrically connected to a control terminal of the third switch and a second terminal electrically connected to the second scan line, wherein the fourth switch is turned on during the preceding half period of the frame period.

3. The flat panel display according to claim 2, wherein the first switch, the second switch, the third switch and the fourth switch are respectively formed by an N-type transistor.

4. The flat panel display according to claim 1, further comprising:

a signal generator, electrically connected to the signal switching unit for generating control signals to control the signal switching unit.

5. The flat panel display according to claim 1, wherein the display panel is a liquid crystal display panel.

6. A flat panel display, comprising:

a display panel, having a first scan line and a second scan line;

a gate driver, disposed at a side of the display panel and having at least an output terminal, wherein the gate driver outputs a gate signal through the output terminal;

a source driver, disposed at another side of the display panel and electrically connected to the display panel for driving the display panel in coordination with the gate signal;

a signal generator, for generating a first control signal and a second control signal in sequence during a frame period; and

a signal switching unit, having a first terminal electrically connected to the output terminal of the gate driver, a second terminal electrically connected to the first scan line and a third terminal electrically connected to the second scan line, wherein the signal switching unit decides whether to turn on the first terminal and the second terminal thereof according to the first control signal, and whether to turn on the first terminal and the third terminal thereof according to the second control signal.

7. The flat panel display according to claim 6, wherein the signal switching unit comprises:

a first switch, electrically connected between the output terminal of the gate driver and the first scan line and having a control terminal for receiving the first control signal;

a second switch, electrically connected between the control terminal of the first switch and the first scan line and having a control terminal for receiving the second control signal;

a third switch, electrically connected between the output terminal of the gate driver and the second scan line and having a control terminal for receiving the second control signal; and

a fourth switch, electrically connected between the control terminal of the third switch and the second scan line and having a control terminal for receiving the first control signal.

8. The flat panel display according to claim 7, wherein the first switch, the second switch, the third switch and the fourth switch are respectively formed by an N-type transistor.

9. The flat panel display according to claim 6, wherein the display panel is a liquid crystal display panel.

10. A flat panel display, comprising:

a display panel, having a first scan line, a second scan line and a third scan line;

a gate driver, disposed at a side of the display panel and having at least an output terminal, wherein the gate driver outputs a gate signal through the output terminal;

a source driver, disposed at another side of the display panel and electrically connected to the display panel for driving the display panel in coordination with the gate signal; and

a signal switching unit, having a first terminal electrically connected to the output terminal of the gate driver, a second terminal electrically connected to the first scan line, a third terminal electrically connected to the second scan line and a fourth terminal electrically connected to the third scan line,

wherein the signal switching unit turns on the first terminal and the second terminal thereof during a preceding period of a frame period, turns on the first terminal and the third terminal thereof during an intermediate period of the frame period and turns on the first terminal and the fourth terminal thereof during a rear period of the frame period.

11. The flat panel display according to claim 10, wherein the signal switching unit comprises:

a first switch, having a first terminal electrically connected to the output terminal of the gate driver and a second terminal electrically connected to the first scan line, wherein the first switch is turned on during the preceding period of the frame period;

a second switch, having a first terminal electrically connected to a control terminal of the first switch and a second terminal electrically connected to the first scan line, wherein the second switch is turned on during the intermediate period of the frame period;

a third switch, having a first terminal electrically connected to a control terminal of the second switch and a second terminal electrically connected to the first scan line, wherein the third switch is turned on during the rear period of the frame period;

a fourth switch, having a first terminal electrically connected to the output terminal of the gate driver and a second terminal electrically connected to the second scan line, wherein the fourth switch is turned on during the intermediate period of the frame period;

a fifth switch, having a first terminal electrically connected to a control terminal of the fourth switch and a second terminal electrically connected to the second scan line, wherein the fifth switch is turned on during the preceding period of the frame period;

a sixth switch, having a first terminal electrically connected to the control terminal of the fourth switch and a second terminal electrically connected to the second scan line, wherein the sixth switch is turned on during the rear period of the frame period;

a seventh switch, having a first terminal electrically connected to the output terminal of the gate driver and a second terminal electrically connected to the third scan line, wherein the seventh switch is turned on during the rear period of the frame period;

an eighth switch, having a first terminal electrically connected to the control terminal of the fourth switch and a second terminal electrically connected to the third scan line, wherein the eighth switch is turned on during the preceding period of the frame period; and

a ninth switch, having a first terminal electrically connected to a control terminal of the sixth switch and a second terminal electrically connected to the third scan line, wherein the ninth switch is turned on during the intermediate period of the frame period.

12. The flat panel display according to claim 11, wherein the first switch to the ninth switch are respectively formed by an N-type transistor.

13. The flat panel display according to claim 10, further comprising:

a signal generator, electrically connected to the signal switching unit for generating control signals to control the signal switching unit.

14. The flat panel display according to claim 10, wherein the display panel is a liquid crystal display panel.

15. A flat panel display, comprising:

a display panel, having a first scan line, a second scan line and a third scan line;

a gate driver, disposed at a side of the display panel and having at least an output terminal, wherein the gate driver outputs a gate signal through the output terminal;

a source driver, disposed at another side of the display panel and electrically connected to the display panel for driving the display panel in coordination with the gate signal;

a signal generator for generating a first control signal, a second control signal and a third control signal in sequence during a frame period; and

a signal switching unit, having a first terminal electrically connected to the output terminal of the gate driver, a second terminal electrically connected to the first scan line, a third terminal electrically connected to the second scan line and a fourth terminal electrically connected to the third scan line,

wherein the signal switching unit decides whether to turn on the first terminal and the second terminal thereof according to the first control signal, whether to turn on the first terminal and the third terminal thereof according to the second control signal and whether to turn on the first terminal and the fourth terminal thereof according to the third control signal.

16. The flat panel display according to claim 15, wherein the signal switching unit comprises:

a first switch, electrically connected between the output terminal of the gate driver and the first scan line and having a control terminal for receiving the first control signal;

a second switch, electrically connected between the control terminal of the first switch and the first scan line and having a control terminal for receiving the second control signal;

a third switch, electrically connected between the control terminal of the second switch and the first scan line and having a control terminal for receiving the third control signal;

a fourth switch, electrically connected between the output terminal of the gate driver and the second scan line and having a control terminal for receiving the second control signal;

a fifth switch, electrically connected between the control terminal of the fourth switch and the second scan line and having a control terminal for receiving the first control signal;

a sixth switch, electrically connected between the control terminal of the fourth switch and the second scan line and having a control terminal for receiving the third control signal;

a seventh switch, electrically connected between the output terminal of the gate driver and the third scan line and having a control terminal for receiving the third control signal;

an eighth switch, electrically connected between the control terminal of the fourth switch and the third scan line and having a control terminal for receiving the first control signal; and

a ninth switch, electrically connected between the control terminal of the sixth switch and the third scan line and having a control terminal for receiving the second control signal.

17. The flat panel display according to claim 16, wherein the first switch to the ninth switch are respectively formed by an N-type transistor.

18. The flat panel display according to claim 15, wherein the display panel is a liquid crystal display panel.