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

摘要

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.

主权项

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 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, when the image signal is discriminated to correspond to the film image, successive first, second, and third original image signals based on the film image signal; generating a first compensation image signal based on the first original image signal and the second original image signal and generating a second compensation image signal based on the second original image signal and the third original image signal; and sequentially outputting the first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal in response to the driving signal, wherein the first original image signal, the first compensation image signal, the second original image signal, and the second compensation image signal are output i times, k times, j times, and k times, respectively, and wherein the discriminating of the 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; 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; discriminating that the n-th image signal is the signal corresponding to the still image if the first difference value, the second difference value and the third difference value respectively, is smaller than the reference value; discriminating that the n-th image signal is the signal corresponding to the film image if the first difference value is smaller than the reference value, the third difference value are greater than the reference value and the fourth difference value are 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 and the fourth difference value is greater than the reference value.