Method of driving light source, light source apparatus and display apparatus having the light source apparatus
A method of driving a light source includes outputting a light source driving signal and outputting a delayed driving signal. The light source driving signal drives a light source based on image data. The delayed driving signal is generated by delaying the light source driving signal based on a vertical sync signal having a frame period of the image data and a data enable signal having a horizontal line period of the image data.
1. A method of driving a light source, comprising:
outputting a light source driving signal, wherein the light source driving signal drives a light source based on image data; and
outputting a delayed driving signal, wherein the delayed driving signal is generated by delaying the light source driving signal based on a first signal having a frame period of the image data and a second signal having a horizontal line period of the image data,
wherein outputting the delayed driving signal comprises:
delaying the light source driving signal to output a frame-delayed driving signal; and
delaying the frame-delayed driving signal to output a line-delayed driving signal.
2. The method of claim 1 , wherein
the light source driving signal is delayed based on a vertical sync signal to output the frame-delayed driving signal, and
the frame-delayed driving signal is delayed based on a data enable signal to output the line-delayed driving signal.
3. The method of claim 2 , wherein the frame-delayed driving signal is output in response to receiving a frame-delaying selection signal.
4. The method of claim 2 , wherein the line-delayed driving signal is output in response to receiving a line-delaying selection signal.
5. The method of claim 1 , wherein the delayed driving signal is synchronized with a panel data signal output by a display panel configured to display an image based on the image data.
6. A method of driving a light source, comprising:
outputting a light source driving signal, wherein the light source driving signal drives a light source based on image data:
outputting a delayed driving signal, wherein the delayed driving signal is generated by delaying the light source driving signal based on a first signal having a frame period of the image data and a second signal having a horizontal line period of the image data:
applying a slope to the delayed driving signal based on vertical resolution signal.
7. The method of claim 6 , wherein the slope is applied to the delayed driving signal in response to the delayed driving signal changing from a first level to a second level different from the first level, and in response to receiving a slope selection signal.
8. The method of claim 7 , wherein the delayed driving signal is changed from the first level to the second level through A steps, wherein A is an integer greater than or equal to 2.
9. The method of claim 8 , wherein A is 2 n and n is a natural number.
10. The method of claim 9 , wherein the delayed driving signal is changed A times based on a quotient obtained by dividing a level difference between the first level and the second level by A.
11. The method of claim 10 , wherein, when dividing the level difference by A results in a remainder, one is added to the quotient according to a number of the remainder.
12. A light source apparatus, comprising:
a light source part configured to generate light;
a light source driver configured to output a light source driving signal, wherein the light source driving signal drives the light source part based on image data; and
a delaying part configured to output a delayed driving signal, wherein the delayed driving signal is generated by delaying the light source driving signal based on a first signal having a frame period of the image data and a second signal having a horizontal line period of the image data,
wherein the delaying part comprises:
a frame delaying part configured to output a frame-delayed driving signal; and
a line delaying part configured to delay the frame-delayed driving signal to output a line-delayed driving signal.
13. The light source apparatus of claim 12 , wherein the
frame delaying part is configured to output the frame-delayed driving signal based on a vertical sync signal; and
a line delaying part is configured to delay the frame-delayed driving signal based on a data enable signal to output the line-delayed driving signal.
14. The light source apparatus of claim 12 , wherein the frame delaying part is configured to receive a frame-delaying selection signal, and output the frame-delayed driving signal in response to receiving the frame-delaying selection signal.
15. The light source apparatus of claim 12 , wherein the line delaying part is configured to receive a line-delaying selection signal, and output the line-delayed driving signal in response to receiving the line-delaying selection signal.
16. The light source apparatus of claim 12 , wherein the line delaying part comprises a line counter configured to count a number of times the data enable signal is activated.
17. The light source apparatus of claim 12 , further comprising:
a sloping part configured to apply a slope to the delayed driving signal in response to the delayed driving signal changing from a first level to a second level different from the first level.
18. A display apparatus, comprising:
a display panel configured to display an image based on image data; and
a light source apparatus, comprising:
a light source part configured to provide the display panel with light;
a light source driver configured to output a light source driving signal, wherein the light source driving signal drives the light source part based on the image data; and
a delaying part configured to output a delayed driving signal, wherein the delayed driving signal is generated by delaying the light source driving signal based on a first signal having a frame period of the image data and a second signal having a horizontal line period of the image data,
wherein the delaying part comprises:
a frame delaying part configured to output a frame-delayed driving signal; and
a line delaying part configured to delay the frame-delayed driving signal to output a line-delayed driving signal.
19. The display apparatus of claim 18 , wherein the light source apparatus further comprises:
a sloping part configured to apply a slope to the delayed driving signal in response to the delayed driving signal changing from a first level to a second level different from the first level.
20. A light source apparatus, comprising:
a light source part configured to generate light;
a light source driver configured to receive image data and output a light source driving signal; and
a synchronization part, comprising:
a frame delaying part configured to receive the light source driving signal from the light source driver, and output a frame-delayed driving signal based on a vertical sync signal having a frame period of the image data;
a line delaying part configured to receive the frame-delayed driving signal from the frame delaying part, delay the frame-delayed driving signal based on a data enable signal having a horizontal line period of the image data, and output a line-delayed driving signal; and
a sloping part configured to receive the line-delayed driving signal from the line delaying part, and apply a slope to the line-delayed driving signal to generate a sloping data signal,
wherein the light source part is driven using the sloping data signal.