Display device
A display device includes: a panel in which plural pixels that emit lights according to a video signal are sectioned into plural areas; a light reception sensor that is arranged in each of the areas and outputs a light reception signal according to light emission luminance; and signal processing means. The area includes first and second pixel groups including at least one pixel and plural pixels other than the first pixel group, respectively. The signal processing means includes arithmetic means for outputting an arithmetic signal according to arithmetic operation of an offset value and a light reception value; converting means for outputting digital data according to the arithmetic signal; and correcting means for correcting the video signal according to the digital data and supplying the corrected video signal to the first pixel group.
1. A display device comprising:
a display panel including a plurality of pixels configured to emit light based on a magnitude of a video signal, the plurality of pixels are sectioned into a plurality of areas of the display panel;
a plurality of light reception sensors, at least one light reception sensor of the plurality of light reception sensors is arranged in one area of the plurality of areas, each light reception sensor of the plurality of light reception sensors is configured to receive incident light and output a light reception signal based on a total luminance value of the incident light that is received; and
signal processing means configured to process one or more light reception signals from the plurality of light reception sensors,
wherein a first area of the plurality of areas of the display panel includes
a first light reception sensor of the plurality of light reception sensors,
a first pixel group of the plurality of pixels including at least one pixel, and
a second pixel group of the plurality of pixels including pixels other than the first pixel group, and
wherein the signal processing means is configured to
obtain the light reception signal from the first light reception sensor,
when the first pixel group and the second pixel group are caused to emit the light at a light emission luminance corresponding to a signal voltage of the video signal, set the light reception signal that is obtained from the first light reception sensor when the first pixel group and the as an offset value, and
when the second pixel group is caused to emit the light at the light emission luminance corresponding to the signal voltage of the video signal and the first pixel group is caused to emit the light at a second light emission luminance different from the light emission luminance corresponding to the signal voltage of the video signal, set the light reception signal that is obtained from the first light reception sensor as a light reception value, and
wherein the signal processing means further includes
an arithmetic means configured to
perform an arithmetic function of the offset value and the light reception value, and
output an arithmetic signal based on the arithmetic function of the offset value and the light reception value,
a converting means configured to output digital data based on the arithmetic signal, and
a modifying means configured to
determine correction data based on the digital data,
modify the video signal using the correction data, and
supply the video signal that is modified to the first pixel group.
2. The display device according to claim 1 , wherein the light emission luminance corresponding to the signal voltage of the video signal is at a predetermined gradation.
3. The display device according to claim 1 , wherein, in the first area of the display panel, the second pixel group includes all pixels of the plurality of pixels other than the first pixel group.
4. The display device according to claim 1 , wherein, in the first area of the display panel, the second pixel group includes some of the plurality of pixels other than the first pixel group.
5. The display device according to claim 1 , wherein, when the light emission luminance corresponding to the signal voltage of the video signal is maintained by the second pixel group and the second light emission luminance of the first pixel group is decreased from the light emission luminance corresponding to the signal voltage of the video signal, the signal processing means is further configured to set the light reception signal that is obtained from the first light reception sensor as the light reception value.
6. The display device according to claim 1 , wherein each pixel of the plurality of pixels is configured to emit the light with one or more self-emitting elements.
7. The display device according to claim 1 , wherein the converting means is an analog-to-digital (A/D) converter.
8. The display device according to claim 1 , wherein the arithmetic function is a calculation of a difference between the offset value and the light reception value.