Method and apparatus for driving liquid crystal display panel

• US 7,079,164 B2
• Filed: 07/30/2002
• Issued: 07/18/2006
• Est. Priority Date: 08/03/2001
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Park, Joon Ha
• Primary Examiner(s): Osorio, Ricardo
• Application Number:
  US10/207,064
• Publication Number:
  US 20030025662A1
• Time in Patent Office: 1,449 Days
• Field of Search: 345/88, 345694-696, 345/613, 382/299, 349/43
• US Class Current: 345/696
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2310/0297 Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A method and apparatus for driving a liquid crystal display panel that is capable of driving a liquid crystal display panel having five color dots within one pixel. In the method, adjacent first color sub-pixels spaced at a desired distance, of a plurality of first color sub-pixels arranged at the middle portion of a pixel are shorted to apply a first color data to said adjacent first color sub-pixels. A second color data is applied to a plurality of second color sub-pixels arranged at one edge of said middle portion within said one pixel. A third color data is applied to a plurality of third color sub-pixels arranged at other edge of said middle portion within said one pixel.

Claims

1. A method of driving a liquid crystal display panel, the liquid crystal display panel including a plurality of data and gate lines that cross each perpendicularly, a pixel from at each intersection between the gate and data lines, each pixel including a plurality of sub-pixels for displaying color data, wherein the pixels are arranged in a matrix formation, the method comprising:

receiving first, second and third color data along with a dot clock signal,

inputting into a first multiplexer the second and third color data and selectively outputting the second and third color data in response to a control signal;

inputting into a second multiplexer the third and second color data and selectively outputting the third and second color data in response to the control signal;

inputting into a third multiplexer the first color data and selectively outputting first color data in response to the control signal;

shorting first color sub-pixels spaced a predetermined distance apart from each other within a line of pixels, the first color sub-pixels being arranged at the middle portion of a pixel, to apply the first color data to said adjacent first color sub-pixels;

applying the second color data to a plurality of second color sub-pixels, the second color sub-pixels being arranged at one edge of said middle portion of the pixels; and

applying the third color data to a plurality of third color sub-pixels, the third sub-pixels being arranged at another edge of said middle portion of the pixels.

2. The method according to claim 1, wherein the step of applying said second color data includes applying a data to said second color sub-pixels arranged correspondingly in a diagonal direction around a first color sub-pixel within said pixel.

3. The method according to claim 2, further comprising the step of:

allowing said second color sub-pixels arranged correspondingly in said diagonal direction to respond to a data signal having a polarity contrary to each other.

4. The method according to claim 1, wherein the step of applying said third color data includes applying a data to said third color sub-pixels arranged correspondingly in a diagonal direction around a first color sub-pixel within said pixel.

5. The method according to claim 4, further comprising the step of:

allowing said third color sub-pixels arranged correspondingly in said diagonal direction to respond to a data signal having a polarity contrary to each other.

6. The method according to claim 1, further comprising the step of:

allowing the first color sub-pixel arranged at the middle portion of pixels located a desired distance from each other to respond to a data signal having a polarity contrary to each other.