Signal generator, method of generating signal, and display device
A signal generator may include a reference horizontal synchronization signal generation block which generates reference horizontal synchronization signals based on a number of clock signals per a horizontal time, a frame clock calculation block which calculates a first frame clock number based on a number of the clock signals per the horizontal time, a frame clock comparation block which calculates a clock offset by comparing the first frame clock number and a second frame clock number generated based on a number of the clock signals per a frame time, a clock distribution block which generates horizontal synchronization signals by distributing a number of the clock signals corresponding to the clock offset to the reference horizontal synchronization signals, and a vertical synchronization signal generation block which generates a vertical synchronization signal based on the horizontal synchronization signals.
1. A signal generator, comprising:
a reference horizontal synchronization signal generation block which generates reference horizontal synchronization signals based on a number of clock signals per a horizontal time;
a frame clock calculation block which calculates a first frame clock number based on a number of the clock signals per the horizontal time;
a frame clock comparation block which calculates a clock offset by comparing the first frame clock number and a second frame clock number generated based on a number of the clock signals per a frame time;
a clock distribution block which generates horizontal synchronization signals by distributing a number of the clock signals corresponding to the clock offset to the reference horizontal synchronization signals; and
a vertical synchronization signal generation block which generates a vertical synchronization signal based on the horizontal synchronization signals.
2. The signal generator of claim 1 , further comprising:
a deviation detection block which generates a clock gain by comparing the clock signals and reference clock signals provided from outside; and
a clock compensation block which calculates the second frame clock number by multiplying the clock gain by the number of the clock signals per the frame time.
3. The signal generator of claim 2 , wherein the clock gain is a ratio of a number of the clock signals per a unit time to a number of the reference clock signals per the unit time.
4. The signal generator of claim 1 , wherein the clock offset is a difference between the first frame clock number and the second frame clock number.
5. The signal generator of claim 1 , wherein the clock distribution block distributes the clock signals corresponding to the clock offset to every two horizontal times (2H) to the reference horizontal synchronization signals.
6. The signal generator of claim 1 , wherein the clock distribution block distributes the clock signals corresponding to the clock offset to every one horizontal time (1H) or three horizontal times (3H) to the reference horizontal synchronization signals.
7. The signal generator of claim 1 , wherein the clock distribution block distributes clock signals corresponding to the clock offset to reference horizontal synchronization signals to which the clock signals are distributed among the reference horizontal synchronization signals, respectively.
8. The signal generator of claim 1 , wherein the clock distribution block distributes two or three clock signals corresponding to the clock offset to each of reference horizontal synchronization signals to which the clock signals are distributed among the reference horizontal synchronization signals.
9. The signal generator of claim 1 , wherein a number of clock signals distributed to each of reference horizontal synchronization signals to which the clock signals are distributed among the reference horizontal synchronization signals is same.
10. The signal generator of claim 1 , wherein a number of clock signals distributed to at least two of reference horizontal synchronization signals among the reference horizontal synchronization signals is different.
11. The signal generator of claim 1 , wherein the frame time includes an active period and a porch period, and
wherein the clock distribution block distributes the clock signals corresponding to the clock offset to reference horizontal synchronization signals in the porch period among the reference horizontal synchronization signals.
12. A method of generating a signal, the method comprising:
generating reference horizontal synchronization signals based on a number of clock signals per a horizontal time;
calculating a first frame clock number based on a number of the clock signals per the horizontal time;
calculating a clock offset by comparing the first frame clock number and a second frame clock number generated based on a number of the clock signals per a frame time;
generating horizontal synchronization signals by distributing a number of the clock signals corresponding to the clock offset to the reference horizontal synchronization signals; and
generating a vertical synchronization signal based on the horizontal synchronization signals.
13. The method of claim 12 , further comprising:
generating a clock gain by comparing the clock signals and reference clock signals provided from outside; and
calculating the second frame clock number by multiplying the clock gain by the number of the clock signals per the frame time.
14. The method of claim 12 , wherein the distributing the clock signals to the reference horizontal synchronization signals includes distributing the clock signals corresponding to the clock offset to every one horizontal time (1H), two horizontal time (2H), or three horizontal times (3H) to the reference horizontal synchronization signals.
15. The method of claim 12 , wherein the distributing the clock signals to the reference horizontal synchronization signals includes distributing one, two, or three clock signals corresponding to the clock offset to each of reference horizontal synchronization signals to which the clock signals are distributed among the reference horizontal synchronization signals.
16. The method of claim 12 , wherein, in the distributing the clock signals to the reference horizontal synchronization signals, a number of clock signals distributed to each of reference horizontal synchronization signals to which the clock signals are distributed among the reference horizontal synchronization signals is same.
17. The method of claim 12 , wherein the frame time includes an active period and a porch period, and
wherein the distributing the clock signals corresponding to the clock offset to the reference horizontal synchronization signals includes distributing the clock signals to reference horizontal synchronization signals in the porch period among the reference horizontal synchronization signals.
18. A display device, comprising:
a display panel including a plurality of pixels;
a scan driver which provides scan signals to the pixels;
a data driver which provides data signals to the pixels;
a timing controller which controls a driving of the scan driver and a driving of the data driver; and
a signal generator which calculates a clock offset by comparing a first frame clock number generated based on a number of clock signals per a horizontal time and a second frame clock number generated based on a number of the clock signals per a frame time, generates horizontal synchronization signals by distributing a number of the clock signals corresponding to the clock offset to reference horizontal synchronization signals, generates a vertical synchronization signal based on the horizontal synchronization signals, and provides the horizontal synchronization signals and the vertical synchronization signal to the timing controller.
19. The display device of claim 18 , wherein the signal generator includes:
a reference horizontal synchronization signal generation block which generates the reference horizontal synchronization signals based on the number of clock signals per the horizontal time;
a frame clock calculation block which calculates the first frame clock number based on the number of the clock signals per the horizontal time;
a frame clock comparation block which calculates the clock offset by comparing the first frame clock number and the second frame clock number;
a clock distribution block which generates the horizontal synchronization signals by distributing a number of the clock signals corresponding to the clock offset to the reference horizontal synchronization signals; and
a vertical synchronization signal generation block which generates the vertical synchronization signal based on the horizontal synchronization signals.
20. The display device of claim 19 , wherein the signal generator further includes:
a deviation detection block which generates a clock gain by comparing the clock signals and reference clock signals provided from an outside; and
a clock compensation block which calculates the second frame clock number by multiplying the clock gain by the number of the clock signals per the frame time.