Method for driving display device, and display device
A method for driving a display device capable of appropriately performing idle driving even when timing information is not transmitted to a liquid crystal module in advance is provided. In a case where, in one vertical period, a non-scanning period other than a scanning period in which a screen of a display unit is scanned once is set to a pause period, a liquid crystal module delays supply of a data signal to the display unit by a recovery period during which a source driver is recovered from a sleep state to an active state in the pause period.
1. A method for driving a display device that performs display by line-sequentially selecting and scanning each of data signal lines of a screen, which includes pixels arranged in a matrix form, with a plurality of scanning signal lines and supplying a data signal to a pixel of the selected data signal lines from the data signal lines, wherein:
in a case where, in one vertical period, a non-scanning period other than a scanning period in which the screen is scanned once is set to a pause period;
in synchronization with an input of the data signal to the display device, a data signal line driving circuit that drives the data signal line starts to be recovered from a sleep state to an active state where the data signal is able to be supplied to the data signal line;
a terminal of a timing controller is shifted to high level in synchronization with the input of the data signal;
the data signal line driving circuit connected to the terminal starts to be shifted to the active state;
by a recovery period during which the data signal line driving circuit that drives the data signal line is recovered from the sleep state to the active state where the data signal is able to be supplied to the data signal line, supply of the data signal to the data signal line driving circuit is delayed from the input of the data signal to the display device;
an end of an active period of the data signal line driving circuit is delayed from an end of the input of the data signal by at least an amount of delay of the supply of the data signal;
the recovery period corresponds to a period in which the scanning signal lines for a preset number of lines are scanned; and
the data signal is supplied to the data signal line driving circuit by being delayed by the preset number of lines.
2. The driving method according to claim 1 , wherein the one vertical period is variable in accordance with a generation speed of the data signal.
3. The driving method according to claim 1 , wherein, in the recovery period, the data signal for the preset number of lines is stored in a line buffer and the data signal stored in the line buffer is supplied to the data signal line driving circuit by being delayed by the preset number of lines.
4. The driving method according to claim 1 , wherein, in the recovery period, the data signal for one frame is stored in a frame buffer and the data signal stored in the frame buffer is supplied to the data signal line driving circuit by being delayed by the preset number of lines.
5. The driving method according to claim 1 , wherein an oxide semiconductor is used as a semiconductor layer of a TFT of each of the pixels.
6. The driving method according to claim 5 , wherein the oxide semiconductor is an In—Ga—Zn—O-based oxide semiconductor.
7. A display device that is driven by the driving method according to claim 1 .
8. The driving method according to claim 1 , wherein the data signal is supplied to the data signal line driving circuit subsequently to recovery of the data signal line driving circuit, by being delayed by the preset number of lines.
9. The driving method according to claim 1 , wherein the data signal is supplied to the data signal line driving circuit simultaneously with recovery of the data signal line driving circuit, by being delayed by the preset number of lines.
10. A method for driving a display device for display that includes a panel driving unit driving a display panel and performing display by line-sequentially selecting and scanning each of data signal lines of a screen, which includes pixels arranged in a matrix form, with a plurality of scanning signal lines and by supplying a data signal to a pixel of the selected data signal lines from the data signal lines, wherein:
in a case where, in one vertical period, a non-scanning period other than a scanning period in which the screen of the display panel is scanned once is set to a pause period;
in synchronization with an input of the data signal to the display device, a data signal line driving circuit that drives the data signal line starts to be recovered from a sleep state to an active state where the data signal is able to be supplied to the data signal line;
a terminal of a timing controller is shifted to high level in synchronization with the input of the data signal, and
the data signal line driving circuit connected to the terminal starts to be shifted to the active state;
by a recovery period during which the panel driving unit is recovered, in the pause period, from the sleep state to the active state where the data signal is able to be supplied to the data signal line, supply of the data signal to the panel driving unit is delayed from the input of the data signal to the display panel;
an end of an active period of the panel driving unit is delayed from an end of the input of the data signal by at least an amount of delay of the supply of the data signal;
the recovery period corresponds to a period in which the scanning signal lines for a preset number of lines are scanned; and
the data signal is supplied to the data signal line driving circuit by being delayed by the preset number of lines.
11. The driving method according to claim 10 , wherein an oxide semiconductor is used as a semiconductor layer of a TFT of each of the pixels.
12. The driving method according to claim 10 , wherein the one vertical period is variable in accordance with a generation speed of the data signal.
13. The driving method according to claim 10 , wherein, in the recovery period, the data signal for the preset number of lines is stored in a line buffer and the data signal stored in the line buffer is supplied to the panel driving unit by being delayed by the preset number of lines.
14. The driving method according to claim 10 , wherein, in the recovery period, the data signal for one frame is stored in a frame buffer and the data signal stored in the frame buffer is supplied to the panel driving unit by being delayed by the preset number of lines.
15. A display device that is driven by the driving method according to claim 10 .
16. The driving method according to claim 10 , wherein the data signal is supplied to the panel driving unit subsequently to recovery of the panel driving unit, by being delayed by the preset number of lines.
17. The driving method according to claim 10 , wherein the data signal is supplied to the panel driving unit simultaneously with recovery of the panel driving unit, by being delayed by the preset number of lines.