Method and apparatus for driving liquid crystal display panel

• US 20030025662A1
• Filed: 07/30/2002
• Published: 02/06/2003
• Est. Priority Date: 08/03/2001
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Park, Joon Ha
• Granted Patent: US 7,079,164 B2
• Time in Patent Office: Days
• US Class Current: 345/88
• 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 comprising:

shorting 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, to apply a first color data to said adjacent first color sub-pixels;

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

applying a third color data to a plurality of third color sub-pixels arranged at other edge of said middle portion within said one pixel.

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-field within said one pixel.

3. 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-field within said one pixel.

4. 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.

5. The method according to claim 3, 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 a plurality of first color sub-pixels arranged at the middle portion of said pixel to respond to a data signal having a polarity contrary to each other at a desired interval.

7. A driving apparatus for a liquid crystal display panel having pixels, each of which includes a plurality of sub-pixels, arranged in a matrix type, said apparatus comprising:

signal selecting means for selecting said sub-pixels to input red, green and blue data;

control signal generating means for generating a control signal for controlling the signal selecting means using a horizontal synchronizing signal and a dot clock inputted from the exterior thereof; and

said liquid crystal display for applying a data outputted from the signal selecting means to said sub-pixels to thereby display a picture.

8. The driving apparatus according to claim 7, wherein the signal selecting means includes:

first signal selecting means for allowing said red and green data to be firstly applied alternately by said control signal upon driving of the liquid crystal display panel; and

second signal selecting means for allowing said blue data to be applied every desired constant interval.

9. The driving apparatus according to claim 7, wherein the control signal generating means includes:

first control signal generating means for supplying a control signal for allowing said green data to be applied every desired constant interval using said dot clock; and

second control signal generating means for allowing said control signal to be applied to the signal selecting means and the first control signal generating means using said horizontal synchronizing signal.

10. A liquid crystal display device comprising:

a pixel having first, second, third, fourth and fifth dot components, each dot component having a switching element;

a data driver and a gate driver;

a plurality of data lines connected to the data driver and respective switching elements;

a plurality of gate lines connected to the gate driver and the respective switching elements;

wherein the first and second dot components are connected to a first data line, the third dot component is connected to a second data line, and the fourth and fifth dot components are connected to a third data line, the switching element of the third dot component being connected to a switching element of a dot component in a second pixel having five dot components.

11. A liquid crystal display device comprising:

a first pixel having first, second, third, fourth and fifth dot components, each of the first, second, third, fourth and fifth dot components having a switching element;

a second pixel having sixth, seventh, eighth, ninth and tenth dot components, each of the sixth, seventh, eighth, ninth and tenth dot components having a switch element;

a data driver and a gate driver;

a plurality of data lines connected to the data driver and respective switching elements;

a plurality of gate lines connected to the gate driver and the respective switching elements;

wherein the first and second dot components are connected to a first data line, the third dot component is connected to a second data line, and the fourth and fifth dot components are connected to a third data line,

wherein the sixth and seventh dot components are connected to a fourth data line, the eighth dot component is connected to a fifth data line, and the ninth and tenth dot components are connected to a sixth data line,

wherein the third dot component of the first pixel is connected to the eighth dot component of the second pixel.

12. The liquid crystal display device according to claim 11, wherein a first output line of the data driver is connected to first and second dot components, a second consecutive line of the data driver is disconnected from any dot components, a third consecutive line of the data driver is connected to fourth and fifth dot components, fourth consecutive line of the data driver is connected to the sixth and seventh dot components, fifth consecutive line of the data driver is connected to the eighth dot component, sixth consecutive line of the data driver is connected to the ninth and tenth dot components.

13. A liquid crystal display device comprising:

an array of pixels each having five dot components; and

data lines connected to the pixels, each pixel being connected to a three data line group, wherein a data line in one of three data line groups is connected to a data line in another one of three data line groups.