Liquid crystal display device

1. A liquid crystal display device, comprising:

a liquid crystal cell forming an image display area;

a driver for applying a voltage to said liquid crystal cell;

an overdrive controller for controlling said driver to apply an overdrive voltage exceeding a targeted pixel value to said liquid crystal cell, wherein said overdrive controller controls such that the driver outputs the voltage to accelerate or decelerate a brightness transition for each sub-pixel in order to make up effective brightness of each sub-pixel which forms a single full-pixel;

wherein said overdrive controller selects the overdrive voltage for the sub-pixel exhibiting the slowest transition of brightness and selects the voltage to accelerate or decelerate a brightness transition for the other sub-pixels in order to coordinate with the sub-pixel exhibiting the slowest transition; and

wherein said overdrive controller stores predicted capacitance for each of the sub-pixels and calculates the voltage to accelerate or decelerate a brightness transition for each sub-pixel in order to coordinate with each other based on the predicted capacitance.

2. A liquid crystal display device, comprising:

a liquid crystal cell forming an image display area;

a driver for applying a voltage to said liquid crystal cell;

an overdrive controller for controlling said driver to apply an overdrive voltage exceeding a targeted pixel value to said liquid crystal cell, wherein said overdrive controller controls such that the driver outputs the voltage to accelerate or decelerate a brightness transition for each sub-pixel in order to make up effective brightness of each sub-pixel which forms a single full-pixel; and

wherein said overdrive controller stores predicted capacitance for each of the sub-pixels and calculates the overdrive voltage based on the predicted capacitance.

3. A liquid crystal display device, comprising:

a liquid crystal cell for displaying an image when a voltage is applied to each pixel in a thin film transistor (TFT) structure;

a driver for applying a voltage to each of the pixels of said liquid crystal cell;

a controller for controlling the driver to apply a voltage to said liquid crystal cell, the voltage exceeding what is to be applied when displaying targeted brightness on the liquid crystal cell, wherein said controller comprises:

transition state comprehending unit for comprehending for each of the sub-pixels a transition state between present starting brightness of said liquid crystal cell predicted in advance and targeted brightness at one refresh cycle later which is to be displayed hereupon;

voltage calculating unit for calculating a voltage to be applied to each of said sub-pixels based on the transition state comprehended;

capacitance predicting unit for predicting a capacitance value of a pixel that is reached after the refresh cycle when applying said voltage calculated by said voltage calculating unit to the pixel with the present capacitance value; and

a storage device for storing said capacitance value predicted by said capacitance predicting unit.

4. The liquid crystal display device according to claim 3 , wherein said present starting brightness used by said transition state comprehending unit is said capacitance value stored in said storage device.

5. A liquid crystal display drive circuit comprising:

a capacitance predicting unit for predicting a capacitance value that each pixel reaches at one refresh cycle later when applying a predetermined voltage for targeted brightness;

a storage device for storing the predicted capacitance value;

a transition state comprehending unit for comprehending a transition state of brightness based on the targeted brightness of each sub-pixel at one refresh cycle later and the capacitance value stored in said storage device; and

a voltage calculating unit for calculating a voltage to be applied to each sub-pixel based on the transition state of brightness comprehended.

6. The liquid crystal display drive circuit according to claim 5 , wherein said voltage calculating unit calculates the voltage which is accelerated or decelerated to coordinate the effective brightness of each sub-pixel.

7. A method for driving a liquid crystal display, wherein an input pixel value is overdriven to output a modified pixel value, the method comprising the steps of:

predicting a capacitance value that each pixel reaches at one refresh cycle later when applying a predetermined voltage for the input pixel value;

storing the predicted capacitance value;

comprehending a transition state of brightness for each of sub-pixels constituting each pixel based on an input pixel value at one refresh cycle later and said stored capacitance value; and

calculating a voltage for a predetermined sub-pixel to be underdriven depending on the transition state of brightness comprehended.

8. The method according to claim 7 , further comprising the steps of:

selecting the sub-pixel exhibiting the slowest transition of brightness from the transition states comprehended; and

calculating a voltage for the selected sub-pixel to be overdriven.

9. A program for directing a computer to drive a liquid crystal display device, the program comprising the functions of:

predicting a capacitance value that each pixel reaches at one refresh cycle later when applying a predetermined voltage to said liquid crystal display device based on a pixel value to be displayed;

storing the predicted capacitance value in a buffer of said computer;

comprehending a transition state of brightness for each of sub-pixels constituting each pixel based on an input pixel value at one refresh cycle later and said stored capacitance value; and

calculating a voltage for a predetermined sub-pixel to be underdriven depending on the transition state of brightness comprehended.