TIMING CONTROL CIRCUIT AND FLAT DISPLAY APPARATUS USING SAME

• US 20120169695A1
• Filed: 07/28/2011
• Published: 07/05/2012
• Est. Priority Date: 12/29/2010
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Chang, Chia-Wei, Lin, Hsin-Yu
• Application Number:
  US13/192,793
• Publication Number:
  US 20120169695A1
• Time in Patent Office: Days
• US Class Current: 345/211
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A timing control circuit includes a gate voltage supply module, a control module and a gate voltage adjusting module. The gate voltage supplying module generates and outputs a gate voltage. The control module outputs at least one control signal following a variation of time during a period for displaying a frame of image. The gate voltage adjusting module is electrically connected both to the gate voltage supply module and the control module, and adjusts a change rate of an original gate voltage on a junction between the gate voltage adjusting module and the gate voltage supply module according to the at least one control signal. The change rate of the original gate voltage is gradually decreasing or increasing, and the gate voltage output is relative to the original gate voltage. A flat display apparatus using the timing control circuit is also provided.

Claims

1. A timing control circuit for flat display apparatus, comprising:

a gate voltage supply module generating and outputting a gate voltage;

a control module outputting at least one control signal following a variation of time during a period for displaying a frame of image; and

a gate voltage adjusting module electrically connected both to the gate voltage supply module and the control module, configured for adjusting a change rate of an original gate voltage on a junction between the gate voltage adjusting module and the gate voltage supply module according to the at least one control signal output by the control module;

wherein the change rate of the original gate voltage is gradually decreasing or increasing, and the gate voltage output by the gate voltage supply module is relative to the original gate voltage.

2. The timing control circuit according to claim 1, wherein the gate voltage adjusting module comprising:

a plurality of resistors parallel connected and each having a terminal electrically coupled to the original gate voltage; and

a plurality of switches respectively electrically coupled between the corresponding resistors and a predetermined potential;

wherein when one of the switches is actuated, a corresponding discharging route for the original gate voltage is provided such that the original gate voltage decreases gradually.

3. The timing control circuit according to claim 1, wherein the gate voltage adjusting module comprising:

a first resistor and a second resistor each having a terminal electrically coupled to the original gate voltage;

a third resistor electrically coupled between the original gate voltage and a predetermined potential;

a first switch electrically coupled between another terminal of the first resistor and the predetermined potential; and

a second switch electrically coupled between another terminal of the second resistor and the predetermined potential;

wherein the at least one control signal output by the control module controls whether actuates the first switch and the second switch.

4. The timing control circuit according to claim 1, wherein the gate voltage adjusting module comprising:

a variable resistor coupled between the original gate voltage and a predetermined potential, and a resistance of the variable resistor being variable according to the at least one control signal output by the control module.

5. A flat display apparatus, comprising:

a plurality of data lines providing display data;

a plurality of scanning lines arranged in a first direction and each configured for transmitting a pulse signal; and

a plurality of pixel units respectively electrically connected to corresponding one of the data lines and corresponding one of the scanning lines;

wherein each pulse signal transmitted in the corresponding scanning line having a chamfer at a falling edge, and slope variations of the chamfers along with the first direction being the same.

6. The flat display apparatus according claim 5 further comprising a timing control circuit comprising:

a gate voltage supply module generating and outputting a gate voltage;

a control module outputting at least one control signal following a variation of time during a period for displaying the frame of image; and

a gate voltage adjusting module electrically connected both to the gate voltage supply module and the control module, configured for adjusting a change rate of an original gate voltage on a junction between the gate voltage adjusting module and the gate voltage supply module according to the at least one control signal output by the control module;

wherein the gate voltage corresponds to a threshold of the pulse signal.

7. The flat display apparatus according to claim 6, wherein the gate voltage adjusting module comprising:

a plurality of resistors parallel connected and each having a terminal electrically coupled to the original gate voltage; and

a plurality of switches respectively electrically coupled between the corresponding resistors and a predetermined potential;

wherein when one of the switches is actuated, a corresponding discharging route for the original gate voltage is provided such that the original gate voltage decreases gradually.

8. The flat display apparatus according to claim 6, wherein the gate voltage adjusting module comprises:

a first resistor and a second resistor each having a terminal electrically coupled to the original gate voltage;

a third resistor electrically coupled between the original gate voltage and a predetermined potential;

a first switch electrically coupled between another terminal of the first resistor and the predetermined potential; and

a second switch electrically coupled between another terminal of the second resistor and the predetermined potential;

wherein the at least one control signal output by the control module controls whether actuates the first switch and the second switch.

9. The flat display apparatus according to claim 6, wherein the gate voltage adjusting module comprise a variable resistor electrically coupled between the original gate voltage and a predetermined potential, and a resistance of the variable resistor being variable according to the at least one control signal output by the control module.