Data driver and display device including the same
A display device includes a timing controller, a data driver controlled by the timing controller, and a display panel configured to display an image by the data driver. When a data signal is applied in an abnormal state, the data driver generates a voltage for display of black by itself, and supplies the voltage to the display panel.
1. A display device comprising:
a timing controller;
a data driver controlled by the timing controller; and
a display panel configured to display an image by the data driver,
wherein the data driver is configured to, when a clock signal included in a data signal provided to the data driver from the timing controller cannot be recovered by a clock recovery circuit of the data driver, generate a voltage for display of black and supply the voltage to the display panel.
2. The display device according to claim 1 , wherein the data driver generates the voltage for display of black based on a logic state of an internal lock signal corresponding to recovery of the clock signal.
3. The display device according to claim 2 , wherein the data driver generates the voltage for display of black when the internal lock signal transitions to logic low.
4. The display device according to claim 2 , wherein the data driver comprises a multiplexer; and
wherein the multiplexer uses a black voltage source as an output thereof based on the internal lock signal.
5. The display device according to claim 2 , wherein the data driver comprises a latch configured to store a data signal transmitted from the timing controller; and
wherein the latch resets the data signal, thereby outputting a data signal of 0.
6. The display device according to claim 1 , wherein the data driver is configured to output a data voltage after outputting the voltage for display of black during a period in which a gate start pulse for control of start of a scan signal is generated at least two times.
7. A data driver comprising:
a recovery circuit configured to receive a signal including a clock signal and a data signal from a data packet input through an input terminal from a timing controller and to output an internal lock signal having a value associated with recovery of the clock signal; and
a data converter configured to generate a voltage for display of black based on the value of the internal lock signal and to output the voltage for display of black.
8. The data driver according to claim 7 , wherein the data converter comprises a multiplexer; and
wherein the multiplexer uses a black voltage source as an output thereof based on the internal lock signal.
9. The data driver according to claim 7 , wherein the data converter comprises a latch configured to store a data signal; and
wherein the latch resets the data signal based on the internal lock signal, thereby outputting a data signal of 0.
10. The data driver according to claim 7 , wherein the data converter is configured to generate the voltage for display of black when the internal lock signal transitions to logic low.
11. The data driver according to claim 1 , wherein the data driver cannot recover the clock signal based on at least one of a temperature in the display panel and deterioration of driving stability.
12. The data driver according to claim 1 , wherein the display of black reduces a power consumed in the display panel.
13. The data driver according to claim 1 , wherein the data driver is further configured to:
transmit information to the timing controller indicating failure to recover the clock signal.
14. The data driver according to claim 1 , wherein the data signal is provided to the data driver from an adjacent data driver.
15. The data driver according to claim 1 , wherein the data driver is further configured to transmit the data signal to an adjacent data driver.
16. The data driver according to claim 7 , wherein the internal lock signal indicates the clock signal cannot be recovered based on at least one of a temperature in a display panel and deterioration of driving stability.
17. The data driver according to claim 7 , wherein the display of black reduces a power consumed in a display panel.
18. The data driver according to claim 7 , wherein the data signal is provided to the data driver from an adjacent data driver.
19. The data driver according to claim 7 , wherein the data driver is further configured to transmit the data signal to an adjacent data driver.