Display apparatus
View Patent ↗A display apparatus and a driving method thereof, in which the display apparatus includes a temperature sensor detecting a temperature, a first memory, a timing controller that receives an (n−1)th image signal and an nth image signal of consecutive frames, corrects the nth image signal and outputs the nth image signal, wherein the timing controller generates a clock signal whose phase varies according to the detected temperature, writes the nth image signal in the first memory in synchronization with the clock signal, reads the (n−1)th image signal from the first memory, and compares the nth image signal and the (n−1)th image signal with each other to then correct the nth image signal based on the comparison result, a data driver that provides an image-data voltage corresponding to the corrected signal of the nth image signal, and a liquid crystal panel that displays an image corresponding to the image-data voltage.
1. A display apparatus comprising:
a temperature sensor detecting a temperature;
a first memory;
a timing controller that receives an (n−1)th image signal and an nth image signal of consecutive frames, corrects the nth image signal and outputs a corrected signal of the nth image signal, wherein the timing controller generates a clock signal whose phase increases or decreases according to the detected temperature without changing a frequency of the clock signal, writes the nth image signal in the first memory in synchronization with the clock signal, reads the (n−1)th image signal from the first memory, and compares the nth image signal and the (n−1)th image signal with each other to correct the nth image signal based on the comparison result;
a data driver that provides an image-data voltage corresponding to the corrected signal of the nth image signal; and
a liquid crystal panel that displays an image corresponding to the image-data voltage.
2. The display apparatus of claim 1 , wherein the timing controller maintains a set-up time and a hold time of the nth image signal for the clock signal irrespective of the detected temperature.
3. The display apparatus of claim 2 , wherein the timing controller increases a phase of the clock signal when the temperature is lowered from a predetermined temperature.
4. The display apparatus of claim 2 , wherein the timing controller decreases a phase of the clock signal when the temperature is raised from a predetermined temperature.
5. The display apparatus of claim 1 , further comprising a second memory including a first look-up table (LUT) that receives the detected temperature and provides a phase control signal corresponding to the detected temperature to the timing controller, and a second LUT that provides the nth correction signal for correcting the nth image signal fed to the timing controller.
6. The display apparatus of claim 5 , wherein the timing controller includes a memory controller that provides the phase control signal and increases or decreases the phase of the clock signal, and an image-signal-correcting unit that provides the nth correction signal and corrects the nth image signal.
7. The display apparatus of claim 1 , wherein the first memory is a Synchronous Dynamic Random Access Memory.
8. A display apparatus comprising:
a temperature sensor detecting a temperature;
a first memory;
a timing controller that receives an (n−1)th image signal, an nth image signal, and an (n+1)th image signal of consecutive frames, corrects the nth image signal and outputs a corrected signal of the nth image signal, wherein the timing controller generates a clock signal whose phase increases or decreases according to the detected temperature without changing a frequency of the clock signal, writes the (n+1)th image signal in the first memory in synchronization with the clock signal, reads the nth image signal and the (n−1)th image signal from the first memory, and compares the (n+1)th image signal, the nth image signal and the (n−1)th image signal with one another, to correct the nth image signal based on the comparison result;
a data driver that provides an image-data voltage corresponding to the corrected signal of the nth image signal; and
a liquid crystal panel that displays an image corresponding to the image-data voltage.
9. The display apparatus of claim 8 , wherein the timing controller maintains a set-up time and a hold time of the (n+1)th image signal for the clock signal irrespective of the detected temperature.
10. The display apparatus of claim 9 , wherein the timing controller increases a phase of the clock signal when the temperature is lowered from a predetermined temperature.
11. The display apparatus of claim 9 , wherein the timing controller decreases a phase of the clock signal when the temperature is raised from a predetermined temperature.
12. The display apparatus of claim 8 , further comprising a second memory including a first look-up table that receives the detected temperature and provides a phase control signal corresponding to the detected temperature to the timing controller, and a second LUT that provides the nth correction signal for correcting the nth image signal fed to the timing controller.
13. The display apparatus of claim 12 , wherein the timing controller includes a memory controller that provides the phase control signal and increases or decreases the phase of the clock signal, and an image-signal-correcting unit that provides the nth correction signal and corrects the nth image signal.
14. The display apparatus of claim 8 , wherein the first memory includes a first frame memory that stores the (n+1)th image signal and outputs the nth image signal, and a second frame memory that stores the nth image signal and outputs the (n−1)th image signal.
15. The display apparatus of claim 14 , wherein the first memory is a Double Data Rate memory.
16. A method of driving a display apparatus, the method comprising:
detecting a temperature;
generating a clock signal whose phase shifts increases or decreases according to the detected temperature without changing a frequency of the clock signal;
writing an (n+1)th image signal in a memory in synchronization with the clock signal, and reading an nth image signal and an (n−1)th image signal from the memory;
comparing the (n+1)th image signal, the nth image signal and the (n−1)th image signal with one another, and correcting the nth image signal based on the comparison result, to output a corrected signal of the nth image signal;
providing an image-data voltage corresponding to the corrected signal of the nth image signal; and
displaying an image corresponding to the image-data voltage.
17. The method of claim 16 , wherein the step of generating the clock signal comprises maintaining a set-up time and a hold time of the nth image signal for the clock signal irrespective of the detected temperature.
18. The method of claim 17 , wherein the step of generating the clock signal comprises increasing the phase of the clock signal when the temperature is lowered from a predetermined temperature.
19. The method of claim 18 , wherein the generating of the clock signal comprises decreasing a phase of the clock signal when the temperature is raised from a predetermined temperature.