Display interface of mobile telecommunication terminal

• US 20050233773A1
• Filed: 04/19/2005
• Published: 10/20/2005
• Est. Priority Date: 04/20/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Sun Ho
• Granted Patent: US 7,711,394 B2
• Time in Patent Office: Days
• US Class Current: 455/566
• 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 3/3611 Control of matrices with row and column drivers
• 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

A display interface (interface device) of a mobile telecommunication terminal is provided. The mobile telecommunication terminal includes a main body having a processor, and a display coupled to the main body. The processor is configured to implement mobile telecommunication terminal functions. The interface device includes a digital-to-analog converter configured to convert digital pixel information to an analog color signal. The interface device also includes graphic signal lines operatively connected to the digital-to-analog converter, configured to carry the analog color signal to the display. The interfere device also includes a clock line operatively connected to the digital-to-analog converter, configured to provide a timing reference used to sample the analog color signal. The interface device also includes a data enable line operatively connected to the digital-to-analog converter, configured to control transmission of the analog color signal through the graphic signal lines based on a selective switching operation.

Claims

1. A mobile telecommunication terminal having a main body that comprises a processor configured to implement mobile telecommunication terminal functions, a display coupled to the main body, and an interface device, the interface device comprising:

a digital-to-analog converter configured to convert digital pixel information to an analog color signal;

graphic signal lines operatively connected to the digital-to-analog converter, configured to carry the analog color signal to the display;

a clock line (CLK) operatively connected to the digital-to-analog converter, configured to provide a timing reference used to sample the analog color signal; and

a data enable line (DE) operatively connected to the digital-to-analog converter, configured to control transmission of the analog color signal through the graphic signal lines based on a selective switching operation.

2. The mobile telecommunication terminal according to claim 1, wherein the display is a liquid crystal display (LCD).

3. The mobile telecommunication terminal according to claim 1, wherein the mobile telecommunication terminal is a folding type mobile telecommunication terminal.

4. The mobile telecommunication terminal according to claim 1, wherein the graphic signal lines are connected via a flexible printed circuit board.

5. The mobile telecommunication terminal according to claim 1, wherein the analog color signal comprises red-green-blue (RGB) color information.

6. The mobile telecommunication terminal according to claim 5, wherein the graphic signal lines are heterogeneous.

7. The mobile telecommunication terminal according to claim 6, wherein the graphic signal lines comprise Red+, Red−

, Green +, Green−

, Blue+, and Blue−

.

8. The mobile telecommunication terminal according to claim 1, further comprising an analog-to-digital converter (ADC) operatively connected to the graphic signal lines, configured to convert the analog color signal into digital data.

9. An interfacing method in a mobile telecommunication terminal having a main body and a display, the method comprising steps of:

converting graphic data into an analog signal;

transmitting the analog signal to the display;

converting the analog signal to a digital signal; and

storing the digital signal in a video buffer.

10. The method according to claim 9, further comprising a step of:

performing a switching operation to control the transmitting of the analog signal to the display.

11. The method according to claim 10, wherein the step of performing a switching operation comprises transmitting a command signal.

12. The method according to claim 10, wherein the step of performing a switching operation comprises transmitting a data signal.

13. The method according to claim 9, further comprising a step of:

forming the graphic data in the main body.

14. The method according to claim 9, further comprising a step of:

driving the display based on the digital signal stored in the video buffer.