USB display driver, and small-scale mobile monitor and USB display system having the USB display diriver

• US 20090009495A1
• Filed: 07/01/2008
• Published: 01/08/2009
• Est. Priority Date: 07/06/2007
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeon, Byung-chul, Park, Kyung-lip
• Application Number:
  US12/215,953
• Publication Number:
  US 20090009495A1
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G06F 3/1438 using more than one graphics controller
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04

Abstract

Provided is a universal serial bus (USB) display driver including a USB receiving unit that serially receives an image data signal from a host via a USB interface and extracts display data and control data from the image data signal, and a display driver that generates a display data voltage corresponding to the display data based on the control data and applies the display data voltage to a small-scale mobile panel. The USB receiving unit, the display driver and the small-scale mobile panel operate using power delivered via the USB interface, and a panel size of the small-scale mobile panel is less than or equal to a panel size corresponding to a maximum speed of data transmission of the USB interface.

Claims

1. A universal serial bus (USB) display system comprising:

a host having a USB transmission unit configured to serially output an image data signal containing display data and control data;

a USB receiving unit configured to extract the display data and the control data from the image data signal serially received via a USB interface;

a display driver configured to generate a display data voltage corresponding to the display data based on the control data; and

a small-scale mobile panel configured to receive the display data voltage and to display an image corresponding to the image data signal.

2. The system of claim 1, wherein the USB receiving unit, the display driver, and the small-scale mobile panel operate using power delivered via the USB interface.

3. The system of claim 1, wherein a panel size of the small-scale mobile panel is limited by a maximum speed of data transmission supported by the USB interface.

4. The system of claim 3, wherein the panel size of the small-scale mobile panel is less than or equal to a panel size corresponding to a maximum size of an image that is to be displayed when the USB interface transmits the image data signal at the maximum speed of data transmission.

5. The system of claim 3, wherein the small-scale mobile panel is a display panel included in a handheld-phone, a portable multimedia player (PMP), a personal digital assistant (PDA), a navigation device, or a digital camera.

6. The system of claim 1, wherein the USB receiving unit and the display driver are integrated on one chip.

7. The system of claim 1, wherein the USB receiving unit is integrated on a chip different from a chip on which the display driver is integrated.

8. The system of claim 1, wherein the USB receiving unit comprises:

a physical layer block configured to serially receive the image data signal via the USB interface;

a data separating unit configured to separate the image data signal and to extract the display data and the control data;

a display data output unit configured to output the display data; and

a control data output unit configured to output the control data.

9. The system of claim 8, wherein the display data output unit is configured to receive the display data in parallel from the data separating unit, and to output the display data in parallel to the display driver.

10. The system of claim 8, wherein the control data output unit is configured to receive the control data in parallel from the data separating unit, and to output the control data in parallel to the display driver.

11. The system of claim 1, wherein the display driver comprises:

a register unit configured to receive the control data and to extract format information and address information from the control data;

a pixel format unit configured to format the display data to conform to the format information and then to output the formatted display data;

an address generation unit configured to receive the address information and to generate an address signal; and

a frame buffer configured to store the formatted display data in an address corresponding to the address signal.

12. The system of claim 11, wherein the control data further comprises timing information and analog interface information.

13. The system of claim 12, wherein the display driver further comprises:

a timing controller configured to control timing of the display driver to conform to the timing information; and

an analog interface unit configured to control an analog interface of the display driver to conform to the analog interface information.

14. The system of claim 11, wherein the display driver further comprises an analog processor configured to receive the formatted display data from the frame buffer, generate the display data voltage, and output the display data voltage to the small-scale mobile panel.

15. The system of claim 1, wherein the host is a central process unit (CPU), a micro process unit (MPU), or an application processor (AP).

16. A universal serial bus (USB) display driver comprising:

a USB receiving unit configured to serially receive an image data signal from a host via a USB interface, and to extract display data and control data from the image data signal; and

a display driver configured to generate a display data voltage corresponding to the display data based on the control data, and to apply the display data voltage to a small-scale mobile panel,

wherein the USB receiving unit, the display driver and the small-scale mobile panel operate using power delivered via the USB interface, and

a panel size of the small-scale mobile panel is less than or equal to a panel size corresponding to a maximum speed of data transmission of the USB interface.

17. A small-scale mobile monitor comprising:

a universal serial bus (USB) display driver configured to serially receive an image data signal from a host computer via a USB cable, extract display data and control data from the image data signal, and generate a display data voltage corresponding to the display data based on the control data; and

a small-scale mobile panel configured to receive the display data voltage and to display an image corresponding to the image data signal,

wherein a panel size of the small-scale mobile panel is less than or equal to a panel size corresponding to a maximum speed of data transmission of the USB cable, and a display operation is performed using power delivered via the USB cable.

18. The monitor of claim 17, wherein the USB display driver comprises:

a USB receiving unit configured to extract the display data and the control data from the image data signal serially received via the USB cable; and

a display driver configured to generate the display data voltage corresponding to the display data based on the control data.

19. The monitor of claim 18, wherein the USB receiving unit comprises:

a physical layer block configured to serially receive the image data signal via the USB cable;

a data separating unit configured to separate the image data signal to extract the display data and the control data;

a display data output unit configured to output the display data; and

a control data output unit configured to output the control data.

20. The monitor of claim 18, wherein the display driver comprises:

a register unit configured to receive the control data and to extract format information and address information from the control data;

a pixel format unit configured to format the display data to conform to the format information and to output the formatted display data;

an address generation unit configured to receive the address information and to generate an address signal;

a frame buffer configured to store the formatted display data in an address corresponding to the address signal; and

an analog processor configured to receive the formatted display data from the frame buffer, generate the display data voltage, and output the display data voltage to the small-scale mobile panel.

21. A universal serial bus (USB) display system comprising:

a host computer configured to output a main image data signal via a monitor cable, and to output first sub image data signal and second sub image data signal via a USB cable;

a main display monitor configured to display a main image corresponding to the main image data signal received via the monitor cable;

a USB hub configured to connect the USB cable to a first USB cable and a second USB cable;

a first small-scale mobile monitor configured to display a first sub image corresponding to the first sub image data signal serially received via the first USB cable; and

a second small-scale mobile monitor configured to display a second sub image corresponding to the second sub image data signal serially received via the second USB cable.

22. The system of claim 21, wherein the first small-scale mobile monitor performs a display operation using power delivered via the first USB cable.

23. The system of claim 22, wherein the first small-scale mobile monitor comprises:

a USB display driver configured to serially receive the first sub image data signal via the first USB cable, extract display data and control data from the first sub image data signal, and generate a display data voltage corresponding to the display data based on the control data; and

a small-scale mobile panel configured to receive the display data voltage and to display the first sub image corresponding to the first sub image data signal.

24. The system of claim 23, wherein a panel size of the small-scale mobile panel is less than or equal to a panel size corresponding to a maximum speed of data transmission of the first USB cable.

25. The system of claim 23, wherein the USB display driver comprises:

a USB receiving unit configured to extract the display data and the control data from the first sub image data signal serially received via the first USB cable; and

a display driver configured to generate the display data voltage corresponding to the display data based on the control data.

26. The system of claim 21, wherein the second small-scale mobile monitor performs a display operation using power delivered via the second USB cable.

27. The system of claim 26, wherein the second small-scale mobile monitor comprises:

a USB display driver configured to serially receive the second sub image data signal via the second USB cable, extract display data and control data from the second sub image data signal, and generate a display data voltage corresponding to the display data based on the control data; and

a small-scale mobile panel configured to receive the display data voltage and to display the second sub image corresponding to the second sub image data signal.

28. The system of claim 27, wherein a panel size of the small-scale mobile panel is less than or equal to a panel size corresponding to a maximum speed of data transmission of the second USB cable.

29. The system of claim 27, wherein the USB display driver comprises:

a USB receiving unit configured to extract the display data and the control data from the second sub image data signal serially received via the second USB cable; and

a display driver configured to generate the display data voltage corresponding to the display data based on the control data.

30. The system of claim 21, wherein the monitor cable is connected to a graphic card of the host computer, and the USB cable is connected to a USB transmission unit of the host computer.