Data signal generator and display device including the same

Abstract

This invention discloses a data signal generating unit and a display device including the same. The data signal generating unit includes: a grayscale data generating unit; an input data comparison unit that outputs one of a first control signal and a second control signal according to conditions; a first output unit that receives one of the first control signal and the second control signal and a first data signal, and outputs a first output data signal to a first data line; and a second output unit that receives one of the first control signal and the second control signal and the second data signal, and outputs a second output data signal to a second data line.

Claims

1. A data signal generator, wherein, include: A grayscale data generation unit outputs multiple data signals, including a first data signal and a second data signal; an input data comparison unit outputs one of a first control signal and a second control signal based on the first data signal and the second data signal, according to a condition; a first output unit receives one of the first control signal and the second control signal and the first data signal, and outputs a first output data signal to a first data line; and a second output unit receives one of the first control signal and the second control signal and the second data signal, and outputs a second output data signal to a second data line. The condition relates to the change of a first previous data signal input from the grayscale data generation unit to the first data line and a second previous data signal input to the second data line at a previous line time, and the change of the first data signal input from the grayscale data generation unit to the first data line and the second data signal input to the second data line at the current line time. The first control signal causes the first output unit and the second output unit to perform a first operation, and the second control signal causes the first output unit and the second output unit to perform the first operation and the second operation. The condition includes a first condition for outputting the first control signal and a second condition for outputting the second control signal. The first condition is as follows: The first prior data signal and the second prior data signal correspond to the first grayscale voltage, and the first data signal and the second data signal correspond to the second grayscale voltage, thereby changing from the first grayscale voltage of the previous line time to the second grayscale voltage of the current line time. The second condition is as follows: the first prior data signal and the second prior data signal correspond to the second grayscale voltage, and the first data signal and the second data signal correspond to the first grayscale voltage, thereby changing from the second grayscale voltage of the previous line time to the first grayscale voltage of the current line time.

2. As in the data signal generation unit of request item 1, wherein, The first output section and the second output section each include a first buffer and a second buffer, and the first buffer and the second buffer each include at least one transistor. Based on the satisfaction of the first condition, a first sub-control signal for performing the first operation is output from the input data comparison section. The first operation causes all at least one transistor included in the first buffer and the second buffer to be turned on. The first control signal includes the first sub-control signal.

3. As in request item 2, the data signal generation unit, wherein, Based on the satisfaction of the second condition, the first operation and the second operation are performed, and a second sub-control signal for performing the second operation is output from the input data comparison unit. The second operation causes the first output data signal of the first data line, which is the output line of the first output unit, and the second output data signal of the second data line, which is the output line of the second output unit, to be output at the same voltage level. The second control signal includes the first sub-control signal and the second sub-control signal.

4. As in request item 3, the data signal generation unit, wherein, Based on the satisfaction of the second condition, the first operation and the second operation are executed, and the second sub-control signal for executing the second operation is output from the input data comparison unit. The second operation causes the first data line of the first output unit to be connected to the second data line of the second output unit.

5. As in request item 1, the data signal generation unit, wherein, The first control signal includes a first sub-control signal for performing the first operation, the second control signal includes the first sub-control signal and a second sub-control signal for performing the second operation, and the first output unit includes: a first switch group controlled by the first sub-control signal; and a first buffer controlled by the output of the first switch group.

6. As in request item 5, the data signal generation unit, wherein, The second output section includes: a second switch group controlled by the first sub-control signal; and a second buffer controlled by the output of the second switch group.

7. As in request item 6, the data signal generation unit, wherein, It also includes a third switch group for connecting the first output line of the first buffer and the second output line of the second buffer, which is controlled by the second sub-control signal.

8. A display device, wherein, include: The gate drive section outputs gate control signals; The data signal generator outputs a data signal. Multiple gate lines, controlled by the gate control signal; multiple data lines, outputting the data signal; The system includes multiple pixels connected to each of the multiple gate lines and each of the multiple data lines, including a first data line and a second data line. The data signal generation unit includes: a grayscale data generation unit that outputs multiple data signals including a first data signal and a second data signal; an input data comparison unit that, based on the first data signal and the second data signal, outputs one of a first control signal and a second control signal according to a condition; a first output unit that receives one of the first control signal and the second control signal and the first data signal, and outputs a first output data signal to a first data line; and a second output unit that receives one of the first control signal and the second control signal and the second data signal, and outputs a second output data signal to a second data line. The condition relates to a first previous data signal input from the grayscale data generation unit to the first data line and a second previous data signal input to the second data line at a previous line time, and a change in the first data signal input from the grayscale data generation unit to the first data line and the second data signal input to the second data line at the current line time. The first control signal causes the first output unit and the second output unit to perform a first operation. The second control signal causes the first output unit and the second output unit to perform the first operation and the second operation, wherein the conditions include a first condition for outputting the first control signal and a second condition for outputting the second control signal. The first condition is as follows: the first previous data signal and the second previous data signal correspond to a first grayscale voltage, and the first data signal and the second data signal correspond to a second grayscale voltage, thereby changing from the first grayscale voltage at a previous line time to the second grayscale voltage at the current line time. The second condition is as follows: the first previous data signal and the second previous data signal correspond to the second grayscale voltage, and the first data signal and the second data signal correspond to the first grayscale voltage, thereby changing from the second grayscale voltage at a previous line time to the first grayscale voltage at the current line time.

9. The display device as described in claim 8, wherein, The first output section and the second output section each include a first buffer and a second buffer, and the first buffer and the second buffer each include at least one transistor. Based on the satisfaction of the first condition, a first sub-control signal for performing the first operation is output from the input data comparison section. The first operation causes all at least one transistor included in the first buffer and the second buffer to be turned on. The first control signal includes the first sub-control signal.

10. The display device as claimed in claim 9, wherein, Based on the satisfaction of the second condition, the first operation and the second operation are performed, and a second sub-control signal for performing the second operation is output from the input data comparison unit. The second operation causes the first output data signal of the first data line, which is the output line of the first output unit, and the second output data signal of the second data line, which is the output line of the second output unit, to be output at the same voltage level. The second control signal includes the first sub-control signal and the second sub-control signal.

11. The display device as claimed in claim 10, wherein, Based on the satisfaction of the second condition, the first operation and the second operation are executed, and the second sub-control signal for executing the second operation is output from the input data comparison unit. The second operation causes the first data line of the first output unit to be connected to the second data line of the second output unit.

12. The display device as described in claim 8, wherein, The first control signal includes a first sub-control signal for performing the first operation, the second control signal includes the first sub-control signal and a second sub-control signal for performing the second operation, and the first output unit includes: a first switch group controlled by the first sub-control signal; and a first buffer controlled by the output of the first switch group.

13. The display device as claimed in claim 12, wherein, The second output section includes: a second switch group controlled by the first sub-control signal; and a second buffer controlled by the output of the second switch group.

14. The display device as claimed in claim 13, wherein, It also includes a third switch group for connecting the first output line of the first buffer and the second output line of the second buffer, which is controlled by the second sub-control signal.

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