Control IC for color sequential liquid crystal display

• US 20100039362A1
• Filed: 10/20/2008
• Published: 02/18/2010
• Est. Priority Date: 08/13/2008
• Status: Active Grant

• Current Assignee: Sitronix Technology Corporation
• Original Assignee: Sitronix Technology Corporation
• Inventors: Kuo, Ting-Long, Hu, Chung-Yao, Wu, Kai-Yi, CHIEN, Chin-Wei, Lin, Chia-Jung, Wang, Lung-Hui, Zhu, Hong-Zhung, Lin, Chih-Yu, Chang, Chao-Chu
• Granted Patent: US 8,290,290 B2
• Time in Patent Office: Days
• US Class Current: 345/98
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A control IC (integrated circuit) for color sequential liquid crystal displays (LCD) is revealed. The control IC includes an interface for receiving a command and at least one display data and a timing generator to generate a scan timing signal, a data timing signal, and a driving timing signal. According to the scan timing signal, a scan driving circuit generates a scan signal that is sent to the color sequential LCD. In accordance with the data timing signal, a data driving circuit receives the display data for generating a data signal sent to the color sequential LCD. According to the driving timing signal, a light-source driving circuit generates a plurality of driving signals sent to the color sequential LCD so as to generate a plurality of color backlights. In accordance with the scan signal, the data signal and the plurality of backlights, the color sequential LCD displays a frame.

Claims

1. A control integrated circuit(IC) for color sequential liquid crystal displays comprising:

an interface coupled to a microprocessor for receiving a command and at least one display data from the microprocessor;

a timing generator generating a scan timing signal, a data timing signal, and a driving timing signal;

a scan driving circuit generating a scan signal according to the scan timing signal and sends the scan signal to the color sequential LCD; and

a data driving circuit receiving the display data in accordance with the data timing signal to generate a data signal and sends the data signal to the color sequential LCD;

wherein the driving timing signal is sent to a light-source driving circuit so as to make the light-source driving circuit generate a plurality of driving signals that are sent to the color sequential LCD for generating a plurality of color backlights;

the color sequential LCD displays a frame in accordance with the scan signal, the data signal and the plurality of color backlights.

2. The device as claimed in claim 1, wherein the control IC further comprising:

an oscillator generating an oscillation signal; and

a clock generator generating a clock signal according to the oscillation signal and sends the clock signal is sent to the timing generator so that the timing generator generates the scan timing signal, the data timing signal, and the driving timing signal according to the clock signal and the command.

3. The device as claimed in claim 1, wherein the control IC further comprising:

a power supply circuit generating a first power supply and a second power supply respectively sent to the light-source driver circuit, the scan driving circuit and the data driver circuit.

4. The device as claimed in claim 3, wherein the control IC further comprising:

an oscillator generating an oscillation signal and sends the oscillation signal to the power supply circuit so that the power supply circuit generates the first power supply and the second power supply according to the oscillation signal.

5. The device as claimed in claim 3, wherein the power supply circuit comprising:

a charge pump generating the first power supply that is sent to the light-source driver circuit.

6. The device as claimed in claim 5, wherein the power supply circuit further comprising:

a follower circuit receiving the first power supply, generates the second power supply according to the first power supply from, and sends the second power supply to the scan driving circuit and the data driver circuit.

7. The device as claimed in claim 1, wherein the control IC further comprising:

a data storage unit coupled to the interface for storing the displayed data and sending the displayed data to the data driving circuit according to the data timing signal.

8. The device as claimed in claim 1, wherein the control IC further comprising:

a command register coupled to the interface, temporarily storing the command and sending the command to the timing generator.

9. The device as claimed in claim 1, wherein the color sequential liquid crystal display further comprising:

a backlight module generating different color backlights according to the driving signals; and

a display module displaying the frame according to the scan signal, the data signal and the color backlights.

10. The device as claimed in claim 1, wherein the color backlights comprising a red backlight, a green backlight and a blue backlight.

11. The device as claimed in claim 7, wherein the data storage unit is a memory.

12. The device as claimed in claim 11, wherein the memory is a random access memory.

22. The device as claimed in claim 1, wherein the color backlights comprising a red backlight, a green backlight and a blue backlight.

13. A control integrated circuit(IC) for color sequential liquid crystal displays comprising:

an interface coupled to a microprocessor for receiving a command and at least one display data from the microprocessor;

a timing generator generating a scan timing signal, a data timing signal, and a driving timing signal;

a scan driving circuit generating a scan signal according to the scan timing signal and sends the scan signal to the color sequential LCD;

a data driving circuit receiving the display data in accordance with the data timing signal to generate a data signal and sends the data signal to the color sequential LCD; and

a light-source driving circuit generating a plurality of driving signals according to the driving timing signal and sends the driving signals to the color sequential LCD for generating a plurality of color backlights;

wherein the color sequential LCD displays a frame in accordance with the scan signal, the data signal and the plurality of color backlights.

14. The device as claimed in claim 13, wherein the control IC further comprising:

an oscillator generating an oscillation signal; and

a clock generator generating a clock signal according to the oscillation signal and sends the clock signal is sent to the timing generator so that that timing generator generates the scan timing signal, the data timing signal, and the driving timing signal according to the clock signal and the command.

15. The device as claimed in claim 13, wherein the control IC further comprising:

a power supply circuit generating a first power supply and a second power supply respectively sent to the light-source driver circuit, the scan driving circuit and the data driver circuit.

16. The device as claimed in claim 15, wherein the control IC further comprising:

an oscillator generating an oscillation signal and sends the oscillation signal to the power supply circuit so that the power supply circuit generates the first power supply and the second power supply according to the oscillation signal.

17. The device as claimed in claim 15, wherein the power supply circuit comprising:

a charge pump generating the first power supply that is sent to the light-source driver circuit.

18. The device as claimed in claim 17, wherein the power supply circuit further comprising:

a follower circuit receiving the first power supply, generates the second power supply according to the first power supply from, and sends the second power supply to the scan driving circuit and the data driving circuit.

19. The device as claimed in claim 13, wherein the control IC further comprising:

a data storage unit coupled to the interface for storing the displayed data and sending the displayed data to the data driving circuit according to the data timing signal.

20. The device as claimed in claim 13, wherein the control IC further comprising:

a command register coupled to the interface, temporarily storing the command and sending the command to the timing generator.

21. The device as claimed in claim 13, wherein the color sequential liquid crystal display further comprising:

a backlight module generating the color backlights according to the driving signals; and

a display module displaying the frame according to the scan signal, the data signal and the color backlights.

23. The device as claimed in claim 19, wherein the data storage unit is a memory.

24. The device as claimed in claim 23, wherein the memory is a random access memory.