Integrated source driving system

• US 9,082,364 B2
• Filed: 10/17/2012
• Issued: 07/14/2015
• Est. Priority Date: 10/18/2011
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lin, Yung-Hsu, Tu, Ming-Hung, Chung, Chun-Fan, Hsu, Chih-Che
• Primary Examiner(s): Boyd, Jonathan
• Assistant Examiner(s): AZONGHA, SARDIS F
• Application Number:
  US13/654,385
• Publication Number:
  US 20130093742A1
• Time in Patent Office: 1,000 Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2370/08 Details of image data interface between the display device controller and the data line driver circuit
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

A source driving system includes first and second source driving integrated circuits. The first driving integrated circuit includes a first source driver for receiving first display data and driving pixels in a first block of a display panel according to the first display data. The second source driving integrated circuit includes a second source driver electrically connected to the first source driver for receiving second display data and driving pixels in a second block of the display panel according to the second display data. The first and the second source drivers generate first and second display parameters according to the first and the second display data respectively. The second display parameter is transmitted from the second source driver to the first source driver. The first source driver generates a third display parameter according to the first and second parameters and transmits the third display parameter to the second source driver.

Claims

1. A source driving system for driving a display panel, the source driving system comprising:

a first source driving integrated circuit, comprising;

a first source driver for receiving first display data, driving pixels in a first block of the display panel according to the first display data and generating a first display parameter according to the first display data; and

a first power driver electrically connected to a voltage source and the first source driver for generating a first driving voltage to the first source driver; and

a second source driving integrated circuit, comprising;

a second source driver electrically connected to the first source driver for receiving second display data, driving pixels in a second block of the display panel according to the second display data, generating a second display parameter according to the second display data, and transmitting the second display parameter to the first source driver; and

a second power driver electrically connected to the voltage source, the first source driver and the second source driver for generating a second driving voltage to the second source driver wherein the first source driver is further configured to generate a third display parameter according to the first and second parameters and to transmit the third display parameter to the second source driver;

wherein when a difference between the first driving voltage and the second driving voltage is greater than a predetermined value, the first power driver transmits a power driving signal to the second power driver, and the second power driver adjusts the second driving voltage according to the power driving signal.

2. The source driving system of claim 1 further comprising a memory for storing predetermined data;

wherein the first source driving integrated circuit further comprises a first data processor for accessing the predetermined data, and the first source driving integrated circuit is further configured to transmit the predetermined data to the second source driving integrated circuit, and the second source driving integrated circuit further comprises a second data processor for receiving the predetermined data stored in the memory from the first source driving integrated circuit.

3. The source driving system of claim 2, wherein the first source driving integrated circuit further comprises a first data transmission port electrically connected to the first data processor, the second source driving integrated circuit further comprises a second data transmission port electrically connected to the first data transmission port and the second data processor, and the first data processor and the second data processor are configured to transmit data via the first data transmission port and the second data transmission port.

4. The source driving system of claim 3 further comprising a gamma voltage source for generating a plurality of display voltages with different voltage levels, wherein the first source driving integrated circuit is electrically connected to the gamma voltage source, the second source driving integrated circuit is electrically connected to the gamma voltage source via the first source driving integrated circuit, the first source driving integrated circuit is configured to drive the pixels in the first block of the display panel according to the first display data and the plurality of display voltages, and the second source driving integrated circuit is configured to drive the pixels in the second block of the display panel according to the second display data and the plurality of display voltages.

5. The source driving system of claim 1, wherein the first source driving integrated circuit further comprises a first data transmission port electrically connected to the first data processor, the second source driving integrated circuit further comprises a second data transmission port electrically connected to the first data transmission port and the second data processor, and the first data processor and the second data processor are configured to transmit data via the first data transmission port and the second data transmission port.

6. The source driving system of claim 5 further comprising a gamma voltage source for generating a plurality of display voltages with different voltage levels, wherein the first source driving integrated circuit is electrically connected to the gamma voltage source, the second source driving integrated circuit is electrically connected to the gamma voltage source via the first source driving integrated circuit, the first source driving integrated circuit is configured to drive the pixels in the first block of the display panel according to the first display data and the plurality of display voltages, and the second source driving integrated circuit is configured to drive the pixels in the second block of the display panel according to the second display data and the plurality of display voltages.

7. The source driving system of claim 1 further comprising a gamma voltage source for generating a plurality of display voltages with different voltage levels, wherein the first source driving integrated circuit is electrically connected to the gamma voltage source, the second source driving integrated circuit is electrically connected to the gamma voltage source via the first source driving integrated circuit, the first source driving integrated circuit is configured to drive the pixels in the first block of the display panel according to the first display data and the plurality of display voltages, and the second source driving integrated circuit is configured to drive the pixels in the second block of the display panel according to the second display data and the plurality of display voltages.

8. A source driving system for driving a display panel, the source driving system comprising:

a gamma voltage source for generating a plurality of display voltages with different voltage levels;

a first source driving integrated circuit electrically connected to the gamma voltage source, for driving pixels of a first block of the display panel according to first display data and the plurality of display voltages;

a first power driver electrically connected to a voltage source and the first source driver for generating a first driving voltage to the first source driver;

a second source driving integrated circuit electrically connected to the gamma voltage source via the first source driving integrated circuit, for driving pixels of a second block of the display panel according to second display data and the plurality of display voltages; and

a second power driver electrically connected to the voltage source, the first source driver and the second source driver for generating a second driving voltage to the second source driver;

wherein when a difference between the first driving voltage and the second driving voltage is greater than a predetermined value, the first power driver transmits a power driving signal to the second power driver, and the second power driver adjusts the second driving voltage according to the power driving signal.

9. A source driving system for driving a display panel, the source driving system comprising:

a first source driving integrated circuit, comprising;

a first source driver for receiving first display data and driving pixels in a first block of the display panel according to the first display data; and

a first power driver electrically connected to a voltage source and the first source driver for generating a first driving voltage to the first source driver; and

a second source driving integrated circuit, comprising;

a second source driver for receiving second display data and driving pixels in a second block of the display panel according to the second display data; and

a second power driver electrically connected to the voltage source, the first source driver and the second source driver for generating a second driving voltage to the second source driver;

wherein when a difference between the first driving voltage and the second driving voltage is greater than a predetermined value, the first power driver transmits a power driving signal to the second power driver, and the second power driver adjusts the second driving voltage according to the power driving signal.

10. The source driving system of claim 9, wherein the first source driving integrated circuit further comprises:

a comparator electrically configured to receive the first driving voltage and the second driving voltage for comparing the first driving voltage and the second driving voltage to output a comparing signal; and

a control circuit for controlling the first power driver to transmit the power driving signal to the second power driver according to the comparing signal when the difference between the first driving voltage and the second driving voltage is greater than the predetermined value.

11. The source driving system of claim 10 further comprising a memory for storing predetermined data;

wherein the first source driving integrated circuit further comprises a first data processor for accessing the predetermined data and transmitting the predetermined data to the second source driving integrated circuit, and the second source driving integrated circuit further comprises a second data processor for receiving the predetermined data stored in the memory from the first source driving integrated circuit.

12. The source driving system of claim 11, wherein the first source driving integrated circuit further comprises a first data transmission port, the second source driving integrated circuit further comprises a second data transmission port electrically connected to the first data transmission port, and the first data processor and the second data processor are configured to transmit data via the first data transmission port and the second data transmission port.

13. The source driving system of claim 12 further comprising a gamma voltage source for generating a plurality of display voltages with different voltage levels, wherein the first source driving integrated circuit is electrically connected to the gamma voltage source, the second source driving integrated circuit is electrically connected to the gamma voltage source via the first source driving integrated circuit, the first source driving integrated circuit is configured to drive the pixels in the first block of the display panel according to the first display data and the plurality of display voltages, and the second source driving integrated circuit is configured to drive the pixels in the second block of the display panel according to the second display data and the plurality of display voltages.