Display panel driving apparatus, a method of driving a display panel using the display panel driving apparatus and a display apparatus including the display panel driving apparatus
A display panel driving apparatus includes a data processor configured to receive N-th line data of image data. N is a natural number not less than 2. The data processor is further configured to perform a first line delay on the N-th line data to output (N−1)-th line data, to output (N−1)-th line substitution data which is obtained by N-th line substitution data, which is based on the N-th line data and the (N−1)-th line data, and to compensate the N-th line data based on the N-th line data and the (N−1)-th line substitution data to output compensation image data. The display panel driving apparatus further includes a data driver and a gate driver.
1. A display panel driving apparatus comprising:
a data processor configured to receive N-th line data of image data, wherein N is a natural number not less than 2, to perform a first line delay on the N-th line data to output (N−1)-th line data, to output (N−1)-th line substitution data which is obtained by N-th line substitution data, which is based on the N-th line data and the (N−1)-th line data, and to compensate the N-th line data based on the N-th line data and the (N−1)-th line substitution data to output compensation image data;
a data driver configured to generate a data signal in response to the compensation image data output from the data processor, and to output the data signal to a data line of a display panel; and
a gate driver configured to output a gate signal to a gate line of the display panel.
2. The display panel driving apparatus of claim 1 , wherein the data processor comprises:
a first line delaying circuit configured to receive the N-th line data, and to perform the first line delay on the N-th line data to output the (N−1)-th line data;
a substitution data generator configured to generate the N-th line substitution data based on the N-th line data and the (N−1)-th line data; and
a second line delaying circuit configured to perform a second line delay on the N-th line substitution data and to output the (N−1)-th line substitution data.
3. The display panel driving apparatus of claim 2 , wherein the substitution data generator comprises a first look-up table for storing the N-th line substitution data according to the N-th line data and the (N−1)-th line data.
4. The display panel driving apparatus of claim 2 , wherein the substitution data generator receives pixel position data indicating a pixel position in the display panel, and wherein the N-th line substitution data is different according to the pixel position.
5. The display panel driving apparatus of claim 4 , wherein the substitution data generator comprises a plurality of first look-up tables for storing the N-th line substitution data.
6. The display panel driving apparatus of claim 4 , wherein a load of the data line increases along a direction in which the data line extends away from the data driver, and the pixel position data indicates the pixel position along the direction in which the data line extends.
7. The display panel driving apparatus of claim 2 , wherein the data processor further comprises a data compensating circuit configured to compensate the N-th line data based on the N-th line data and the (N−1)-th line substitution data and to output the compensation image data.
8. The display panel driving apparatus of claim 7 , wherein the data compensating circuit comprises a second look-up table for storing the compensation image data according to the N-th line data and the (N−1)-th line substitution data.
9. The display panel driving apparatus of claim 7 , wherein the data compensating circuit receives pixel position data indicating a pixel position in the display panel, and wherein the compensation image data is different according to the pixel position.
10. The display panel driving apparatus of claim 9 , wherein the data compensating circuit comprises a plurality of second look-up tables for storing the compensation image data.
11. The display panel driving apparatus of claim 9 , wherein a load of the data line increases along a direction in which the data line extends away from the data driver, and the pixel position data indicates the pixel position of a pixel along the direction in which the data line extends.
12. The display panel driving apparatus of claim 11 , wherein the compensation image data increases according to an increase of the load of the data line.
13. The display panel driving apparatus of claim 1 , wherein, when (N−1)-th line pixel data, which is generated by charging the compensation image data to an (N−1)-th line pixel, does not reach a target level, the data processor outputs the (N−1)-th line substitution data.
14. The display panel driving apparatus of claim 13 , wherein the (N−1)-th line substitution data is close to the target level.
15. The display panel driving apparatus of claim 13 , wherein, when the (N−1)-th line data is a low level, the N-th line data is a high level, and the (N−1)-th line pixel data does not reach a target low level of the target level, the (N−1)-th line substitution data is close to the target low level.
16. The display panel driving apparatus of claim 13 , wherein, when the (N−1)-th line data is a low level, the N-th line data is the low level, and the (N−1)-th line pixel data does not reach a target low level of the target level, the (N−1)-th line substitution data is close to the target low level.
17. The display panel driving apparatus of claim 13 , wherein, when the (N−1)-th line data is a high level, the N-th line data is the high level, and the (N−1)-th line pixel data does not reach a target high level of the target level, the (N−1)-th line substitution data is close to the target high level.
18. The display panel driving apparatus of claim 1 , wherein the display panel comprises a blue pixel, a green pixel and a red pixel,
wherein the blue pixel is repeatedly disposed in a first direction in which the gate line extends, the green pixel is repeatedly disposed in the first direction, the red pixel is repeatedly disposed in the first direction, and
the blue pixel, the green pixel and the red pixel are sequentially disposed in a second direction in which the data line extends.
19. A method of driving a display panel, the method comprising:
performing a line delay on N-th line data to generate (N−1)-th line data;
outputting (N−1)-th line substitution data which is obtained by delaying N-th line substitution data, wherein the N-th line substitution data is based on the N-th line data and the (N−1)-th line data;
compensating the N-th line data based on the N-th line data and the (N−1)-th line substitution data to generate compensation image data;
outputting a data signal in response to the compensation image data to a data line of a display panel; and
outputting a gate signal to a gate line of the display panel.
20. A display apparatus comprising:
a display panel configured to display an image, the display panel including a gate line and a data line; and
a display panel driving apparatus comprising:
a data processor configured to receive N-th line data of image data, wherein N is a natural number not less than 2, to perform a first line delay on the N-th line data to output (N−1)-th line data, to output (N−1)-th line substitution data which is obtained by N-th line substitution data, which is based on the N-th line data and the (N−1)-th line data, and to compensate the N-th line data based on the N-th line data and the (N−1)-th line substitution data to output compensation image data;
a data driver configured to generate a data signal in response to the compensation image data output from the data processor, and to output the data signal to the data line of the display panel; and
a gate driver configured to output a gate signal to the gate line of the display panel.