Display driving circuit and a display apparatus using the display driving circuit and the method thereof

1. A display driving circuit for receiving an n-bit digital video signal, comprising:

a color correction unit, which removes at least one least significant bit of the n-bit digital video signal to generate an m-bit signal, generates a combined signal according to the m-bit digital video signal and a polarity signal, and generates an n-bit color corrected video signal using a table look-up method according to the combined signal, wherein the combined signal is equal to the m-bit digital video signal if the polarity signal represents a positive polarity and the combined signal is equal to the m-bit digital video signal plus a constant shift quantity if the polarity signal represents a negative polarity, where m and n are positive integers and m is smaller than n; and

a driving unit, which performs digital-to-analog conversion on the color corrected video signal.

2. The display driving circuit according to claim 1 , wherein the driving unit outputs an analogous driving voltage.

3. The display driving circuit according to claim 2 , wherein the driving polarity of the analogous driving voltage corresponds to the polarity signal.

4. The display driving circuit according to claim 1 , wherein the display driving circuit further comprises a timing control unit providing the display driving circuit with a necessary timing signal.

5. A method of driving a liquid crystal display to display an image, comprising the steps of:

receiving an n-bit digital video signal and a polarity signal;

removing at least one least significant bit of the n-bit digital video signal to generate an m-bit digital video signal, where n and m are positive integers and m is smaller than n;

generating a combined signal according to the m-bit digital video signal and the polarity signal, wherein the combined signal is equal to the m-bit digital video signal if the polarity signal represents a positive polarity and the combined signal is equal to the m-bit digital video signal plus a constant shift quantity if the polarity signal represents a negative polarity;

generating a corresponding n-bit color corrected video signal using a table look-up method according to the combined signal;

converting the color corrected video signal into an analogous driving voltage; and

using the analogous driving voltage to drive the liquid crystal display, wherein the driving polarity of the analogous driving voltage corresponds to the polarity signal.

6. The method according to claim 5 , wherein the table look-up step has a look-up table comprising the combined signal and the color corrected video signal.

7. A method of driving a liquid crystal display to display an image, comprising the steps of:

receiving an n-bit digital video signal and a polarity signal;

removing at least one least significant bit of the n-bit digital video signal to generate an m-bit digital video signal, where n and m are positive integers and m is smaller than n;

enabling the m-bit digital video signal to have a driving polarity characteristic to generate a polarity digital signal according to the polarity signal, wherein the polarity digital signal is equal to the m-bit digital video signal if the polarity signal represents a positive polarity and the polarity digital signal is equal to the m-bit digital video signal plus a constant shift quantity if the polarity signal represents a negative polarity;

performing color correction using a table look-up method to generate a corresponding n-bit color corrected video signal according to the polarity digital signal;

converting the color corrected video signal into an analogous driving voltage; and

using the analogous driving voltage to drive the liquid crystal display.

8. The display driving circuit according to claim 1 , wherein the polarity signal is one bit of the combined signal.

9. The display driving circuit according to claim 1 , wherein the constant shift quantity is 2 m .