Display device and electronic product

1. A display device comprising:

a screen unit;

a drive unit; and

a signal processing unit,

wherein the screen unit includes rows of scanning lines, columns of signal lines, matrix-state pixel circuits and a light sensor,

the drive unit includes a scanner supplying a control signal to the scanning lines and a driver supplying a video signal to the signal lines,

the screen unit is sectioned into regions each having pixel circuits,

the drive unit allows different pixel circuits belonging to different regions to simultaneously emit pixel light in accordance with the video signal,

the light sensor detects the pixel light and outputs a luminance signal in accordance with the pixel light, and

the signal processing unit corrects the video signal in accordance with the luminance signal and supplies a drive signal to the driver,

wherein the signal processing unit compares a first luminance signal outputted from the light sensor during a first period with a second luminance signal outputted from the light sensor during a second period that is after the first period, corrects the video signal in accordance with a result of the comparison to generate a corrected video signal, and supplies the drive signal to the driver based on the corrected video signal.

2. The display device according to claim 1 ,

wherein the light sensor is a set of light sensors arranged to correspond to different regions, and

each light sensor outputs the first and the second luminance signals in accordance with pixel light emitted from pixel circuits corresponding to the region.

3. The display device according to claim 1 ,

wherein the signal processing unit supplies the video signal for display during a display period in which a video is displayed in the screen unit, and supplies the video signal for detection during a detection period in which the video is not displayed in the screen unit.

4. The display device according to claim 3 ,

wherein the signal processing unit supplies the video signal for detection in each frame and allows only pixel circuits of detection targets to emit pixel light.

5. An electronic product comprising:

a main body; and

a display displaying information inputted to the main body or information outputted from the main body,

wherein the display includes a screen unit, a drive unit and a signal processing unit,

the screen unit includes rows of scanning lines, columns of signal lines, matrix-state pixel circuits and a light sensor,

the drive unit includes a scanner supplying a control signal to the scanning lines and a driver supplying a video signal to the signal lines,

the screen unit is sectioned into regions each having pixel circuits,

the drive unit allows different pixel circuits belonging to different regions to simultaneously emit pixel light in accordance with the video signal,

the light sensor detects the pixel light and outputs a luminance signal in accordance with the pixel light and

the signal processing unit corrects the video signal in accordance with the luminance signal and supplies a drive signal to the driver,

wherein the signal processing unit compares a first luminance signal outputted from the light sensor during a first period with a second luminance signal outputted from the light sensor during a second period that is after the first period, corrects the video signal in accordance with a result of the comparison to generate a corrected video signal, and supplies the drive signal to the driver based on the corrected video signal.

6. The electronic product to claim 5 ,

wherein the light sensor is a set of light sensors arranged to correspond to different regions, and

each light sensor outputs the first and the second luminance signals in accordance with pixel light emitted from pixel circuits corresponding to the region.

7. The electronic product to claim 5 ,

wherein the signal processing unit supplies the video signal for display during a display period in which a video is displayed in the screen unit, and supplies the video signal for detection during a detection period in which the video is not displayed in the screen unit.

8. The electronic product to claim 7 ,

wherein the signal processing unit supplies the video signal for detection in each frame and allows only pixel circuits of detection targets to emit pixel light.

9. The display device according to claim 1 , wherein the comparison of the first and second luminance signals produces a reduction amount, and

wherein the corrected video signal is configured to adjust the voltage of each pixel based on the reduction amount.

10. The electronic product to claim 5 , wherein the comparison of the first and second luminance signals produces a reduction amount, and

wherein the corrected video signal is configured to adjust the voltage of each pixel based on the reduction amount.