Method of driving display apparatus and driving circuit for display apparatus using the same

Abstract

In a driving method of a display apparatus using a driving circuit, when an image signal is a film image signal, first, second, and third original image signals are extracted based on the film image signal. Then, a first compensation image signal is generated based on first and second original image signals, and a second compensation image signal is generated based on second and third original image signals. The first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal are sequentially output to have a driving frequency higher than an input frequency. In addition, the first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal are output i, k, j, and k times, respectively. Thus, a trembling phenomenon perceived by a viewer of a film image may be prevented.

What is claimed is: 
     
         1 . A method of driving a display apparatus, comprising:
 receiving an image signal in response to a synchronizing signal having a first frequency;   discriminating whether the received image signal is a signal corresponding to a film image or a signal corresponding to a video image;   converting the synchronizing signal into a driving signal having a second frequency higher than the first frequency;   extracting, if the image signal is discriminated to be a film image signal corresponding to the film image, successive first and second original image signals based on the film image signal; and   sequentially outputting the first and second original image signals i times in response to the driving signal.   
     
     
         2 . The method of  claim 1 , wherein the discriminating of the received image signal comprises:
 receiving the image signal as an n-th image signal, a previously-stored (n−1)-th image signal, and a previously-stored (n−2)-th image signal and calculating first, second, and third brightness values corresponding to the n-th image signal, the (n−1)-th image signal, and the (n−2)-th image signal, respectively;   calculating a first difference value corresponding to a difference between the first and second brightness values and a second difference value corresponding to a difference between the second and third brightness values; and   comparing the first and second difference values with a predetermined reference value to discriminate whether the image signal is the signal corresponding to the film image or the signal corresponding to the video image.   
     
     
         3 . The method of  claim 2 , wherein the comparing of the first and second difference values with the reference value comprises:
 comparing the second difference value with the reference value if the first difference value is smaller than the reference value and discriminating that the n-th image signal is the signal corresponding to the video image if the first difference value is greater than the reference value;   calculating a third difference value corresponding to a difference between the third brightness value and a fourth brightness value corresponding to an (n+1)-th image signal and calculating a fourth difference value corresponding to a difference between the fourth brightness value and a fifth brightness value corresponding to an (n+2)-th image signal; and   comparing the third difference value with the reference value if the second difference value is smaller than the reference value and comparing the fourth difference value with the reference value if the second difference value is greater than the reference value to discriminate whether the n-th image signal is the signal corresponding to a still image or the signal corresponding to the film image.   
     
     
         4 . The method of  claim 3 , wherein the comparing of the third and fourth difference value with the reference value comprises:
 discriminating that the n-th image signal is the signal corresponding to the still image if the third difference value is smaller than the reference value and comparing the fourth difference value with the reference value if the third difference value is greater than the reference value; and   discriminating that the n-th image signal is the signal corresponding to the film image if the fourth difference value is smaller than the reference value and that the n-th image signal is the signal corresponding to the video image if the fourth difference value is greater than the reference value.