DISPLAY PANEL DRIVING APPARATUS, A METHOD OF DRIVING A DISPLAY PANEL USING THE DISPLAY PANEL DRIVING APPARATUS AND A DISPLAY APPARATUS HAVING THE DISPLAY PANEL DRIVING APPARATUS

• US 20180247606A1
• Filed: 05/01/2018
• Published: 08/30/2018
• Est. Priority Date: 09/22/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: SUNG, JEONG-MIN, JEON, BYUNG-KIL, YEO, DONG-HYUN, JEONG, SU-HYUN, KIM, EUN-SEON
• Granted Patent: US 10,453,419 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 2330/12 Test circuits or failure detection circuits included in a display system, as permanent part thereof
• CPC Class Codes: G09G 2340/16 Determination of a pixel data signal depending on the signal applied in the previous frame
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

A display panel driving apparatus includes a gate driving circuit, a data driving circuit, a timing controlling circuit and a voltage generating circuit state receiving circuit. The voltage generating circuit state receiving circuit is configured to receive voltage generating circuit state data indicating a temperature, a voltage or a current of a voltage generating circuit from the voltage generating circuit. The voltage generator generates a voltage used to drive the display panel, and controls an operation of the timing controlling circuit according to the voltage generating circuit state data.

Claims

1. A display device comprising:

a display panel configured to display an image and comprising a gate line and a data line;

a gate driving circuit configured to output a gate signal to the gate line of the display panel;

a data driving circuit configured to output a data signal to the data line of the display panel;

a timing controlling circuit configured to control timings of the gate driving circuit and the data driving circuit;

a voltage generating circuit configured to generate a first voltage to drive the display panel; and

a voltage generating circuit state receiving circuit configured to receive a voltage generating circuit temperature data indicating a temperature of the voltage generating circuit, a voltage generating circuit voltage data indicating a voltage of the voltage generating circuit, and a voltage generating circuit current data indicating a current of the voltage generating circuit from the voltage generating circuit and control an operation of the timing controlling circuit based on each of the voltage generating circuit temperature data, the voltage generating circuit voltage data, and the voltage generating circuit current data.

2. The display device of claim 1, wherein the voltage generating circuit state receiving circuit includes:

a first controller configured to receive the voltage generating circuit temperature data;

a second controller configured to receive the voltage generating circuit voltage data; and

a third controller configured to receive the voltage generating circuit current data.

3. The display device of claim 2, wherein the first controller outputs an Accurate Color Capture (ACC) compensation value selection signal for selecting an ACC compensation value according to the voltage generating circuit temperature data.

4. The display device of claim 2, wherein the first controller outputs a Dynamic Capacitance Compensation (DCC) value selection signal for selecting a DCC value according to the voltage generating circuit temperature data.

5. The display device of claim 2, wherein the second controller outputs a ready signal control signal for controlling a ready signal of the timing controlling circuit according to the voltage of the voltage generating circuit.

6. The display device of claim 5, wherein, when the voltage of the voltage generating circuit is less than a reference voltage, the timing controlling circuit activates the ready signal according to the ready signal control signal, and when the voltage of the voltage generating circuit is not less than the reference voltage, the timing controlling circuit deactivates the ready signal according to the ready signal control signal.

7. The display device of claim 2, wherein the second controller outputs a data output control signal for controlling an output data from the timing controlling circuit according to the voltage of the voltage generating circuit.

8. The display device of claim 7, wherein, when the voltage of the voltage generating circuit is less than a reference voltage, the timing controlling circuit outputs an image data according to the data output control signal, and when the voltage of the voltage generating circuit is not less than the reference voltage, the timing controlling circuit outputs a built in self test data according to the data output control signal.

9. The display device of claim 2, wherein the third controller outputs a ready signal control signal for controlling a ready signal of the timing controlling circuit according to the current of the voltage generating circuit.

10. The display device of claim 9, wherein, when the current of the voltage generating circuit is less than a reference current, the timing controlling circuit activates the ready signal according to the ready signal control signal, and when the current of the voltage generating circuit is not less than the reference current, the timing controlling circuit deactivates the ready signal according to the ready signal control signal.

11. The display device of claim 2, wherein the third controller outputs a data output control signal for controlling an output data from the timing controlling circuit according to the current of the voltage generating circuit.

12. The display device of claim 11, wherein, when the current of the voltage generating circuit is less than a reference current, the timing controlling circuit outputs an image data according to the data output control signal, and when the current of the voltage generating circuit is not less than the reference current, the timing controlling circuit outputs a built in self test data according to the data output control signal.

13. A method of driving a display device, the method comprising:

receiving a voltage generating circuit temperature data indicating a temperature of a voltage generating circuit, a voltage generating circuit voltage data indicating a voltage of the voltage generating circuit, and a voltage generating circuit current data indicating a current of the voltage generating circuit, wherein the voltage generating circuit generates a first voltage for driving the display panel;

outputting a timing control circuit control signal for controlling an operation of a timing controlling circuit based on each of the voltage generating circuit temperature data, the voltage generating circuit voltage data, and the voltage generating circuit current data;

operating the timing controlling circuit according to the timing control circuit control signal;

outputting a data signal to a data line of the display panel according to the operation of the timing controlling circuit; and

outputting a gate signal to a gate line of the display panel according to the operation of the timing controlling circuit.

14. The method of claim 13, wherein outputting the timing control circuit control signal comprises outputting an Accurate Color Capture (ACC) compensation value selection signal for selecting an ACC compensation value according to the voltage generating circuit temperature data.

15. The method of claim 13, wherein outputting the timing control circuit control signal comprises outputting a Dynamic Capacitance Compensation (DCC) value selection signal for selecting a DCC value according to the voltage generating circuit temperature data.

16. The method of claim 13, wherein outputting the timing control circuit control signal comprises outputting a ready signal control signal for controlling a ready signal of the timing controlling circuit according to the voltage of the voltage generating circuit, and

wherein, when the voltage of the voltage generating circuit is less than a reference voltage, the timing controlling circuit activates the ready signal according to the ready signal control signal, and when the voltage of the voltage generating circuit is not less than the reference voltage, the timing controlling circuit deactivates the ready signal according to the ready signal control signal.

17. The method of claim 13, wherein outputting the timing control circuit control signal comprises outputting a data output control signal for controlling an output data of the timing controlling circuit according to the voltage of the voltage generating circuit, and

wherein, when the voltage of the voltage generating circuit is less than a reference voltage, the timing controlling circuit outputs image data according to the data output control signal, and when the voltage of the voltage generating circuit is not less than the reference voltage, the timing controlling circuit outputs built in self test data according to the data output control signal.

18. The method of claim 13, wherein outputting the timing control circuit control signal comprises outputting a ready signal control signal for controlling a ready signal of the timing controlling circuit according to the current of the voltage generating circuit, and

wherein, when the current of the voltage generating circuit is less than a reference current, the timing controlling circuit activates the ready signal according to the ready signal control signal, and when the current of the voltage generating circuit is not less than the reference current, the timing controlling circuit deactivates the ready signal according to the ready signal control signal.

19. The method of claim 13, wherein outputting the timing control circuit control signal comprises outputting a data output control signal for controlling an output data of the timing controlling circuit according to the current of the voltage generating circuit, and

wherein, when the current of the voltage generating circuit is less than a reference current, the timing controlling circuit outputs an image data according to the data output control signal, and when the current of the voltage generating circuit is not less than the reference current, the timing controlling circuit outputs a built in self test data according to the data output control signal.