Display device and method of driving the same

Abstract

According to one embodiment, a display device includes a display unit and a driver unit. The driver unit includes a display drive unit, a power supply unit and a control unit. The control unit instructs a display period in which the image is displayed in the display unit and a non-display period in which the image is not displayed to the display drive unit, and instructs mitigation driving which mitigates a difference in an electrical load of the display drive unit between the display period and the non-display period to the power supply unit in the non-display period.

1 - 14  (canceled) 
     
     
         15 . A display device comprising:
 a display panel configured to display an image; and   a display driver configured to drive the display panel, the display driver comprising:
 a video signal processor configured to convert a video signal for the image to a pixel signal, to supply the pixel signal to the display panel, to selectively drive the display panel in a display state in which the image is displayed and a non-display state in which the image is not displayed, and including a source amplifier configured to amplify the pixel signal; 
 a power supply device configured to supply drive power to the video signal processor, and including a booster circuit configured to boost a voltage of the drive power to the source amplifier; and 
 a controller configured to control the video signal processor and the power supply device, 
   wherein the controller instructs a display period driven in the display state and a non-display period driven in the non-display state, and instructs off-state driving configured to stop boosting the voltage of the drive power to be output to the source amplifier when the display period is switched to the non-display period.   
     
     
         16 . The display device of  claim 15 , wherein the controller instructs on-state driving configured to activate boosting the voltage of the drive power to be output to the source amplifier when the non-display period is switched to the display period. 
     
     
         17 . The display device of  claim 15 , wherein
 the video signal processor comprises:
 an interface receiver configured to convert an external clock rate of the video signal into an internal clock rate; and 
 a line latch circuit configured to latch the video signal of one line or a plurality of lines of the display panel. 
   
     
     
         18 . The display device of  claim 15 , wherein the power supply device includes a regulator configured to:
 receive power supply;   generate the drive power from the power supply; and   output the drive power stably.   
     
     
         19 . The display device of  claim 15 , wherein
 the display panel includes a plurality of pixel electrodes and a plurality of common electrodes for forming a storage capacitor and performing spatial light modulation for each pixel based on the pixel signal, and   the video signal processor supplies the pixel signal to the pixel electrodes in the display period, and does not supply the pixel signal to the pixel electrodes in the non-display period.   
     
     
         20 . The display device of  claim 15 , wherein
 the video signal processor further comprises a common electrode driving circuit configured to drive the common electrodes,   the common electrode driving circuit sets all of the common electrodes at a common potential in the display period and sets some of the common electrodes at a potential other than the common potential in the non-display period.   
     
     
         21 . The display device of  claim 20 , further comprising;
 a plurality of touch detection elements configured to detect a touch operation from a change in capacitance based on the potential between the touch detection elements and some of the common electrodes in the non-display period, and   a touch-panel controller connected the touch detection elements and configured to receive detection output of the touch detection elements.   
     
     
         22 . An integrated circuit device for driving a display panel configured to display an image, the device comprising:
 a video signal processor configured to convert a video signal for the image to a pixel signal, to supply the pixel signal to the display panel, to selectively drive the display panel in a display state in which the image is displayed and a non-display state in which the image is not displayed, and including a source amplifier configured to amplify the pixel signal;   a power supply device configured to supply drive power to the video signal processor, and including a booster circuit configured to boost a voltage of the drive power to the source amplifier; and   a controller configured to control the video signal processor and the power supply device,   wherein the controller instructs a display period driven in the display state and a non-display period driven in the non-display state, and instructs off-state driving configured to stop boosting the voltage of the drive power to be output to the source amplifier when the display period is switched to the non-display period.   
     
     
         23 . The integrated circuit device of  claim 22 , wherein the controller instructs on-state driving configured to activate boosting the voltage of the drive power to be output to the source amplifier when the non-display period is switched to the display period.