Display device and electronic product

• US 20100118003A1
• Filed: 10/19/2009
• Published: 05/13/2010
• Est. Priority Date: 11/07/2008
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Uchino, Katsuhide, Yamashita, Junichi
• Granted Patent: US 8,847,935 B2
• Time in Patent Office: Days
• US Class Current: 345/205
• CPC Class Codes: G09G 2320/045 Compensation of drifts in the characteristics of light emitting or modulating elements
• CPC Class Codes: G09G 2320/046 Dealing with screen burn-in prevention or compensation of the effects thereof
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 2360/147 the originated light output being determined for each pixel
• CPC Class Codes: G09G 3/30 using electroluminescent panels
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

A display device includes: a screen unit; a drive unit; a signal processing unit; and a selector, 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 plural regions each having plural pixel circuits, the pixel circuit emits light in accordance with the video signal, the light sensor is arranged with respect to each region and outputs a luminance signal in accordance with the light emission, the selector supplies plural luminance signals to the signal processing unit by switching the signals, and the signal processing unit corrects the video signal in accordance with the luminance signals and supplies the video signal to the driver.

Claims

1. A display device comprising:

a screen unit;

a drive unit;

a signal processing unit; and

a selector,

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 plural regions each having plural pixel circuits,

the pixel circuit emits light in accordance with the video signal,

the light sensor is arranged with respect to each region and outputs a luminance signal in accordance with the light emission,

the selector supplies plural luminance signals to the signal processing unit by switching the signals, and

the signal processing unit corrects the video signal in accordance with the luminance signals and supplies the video signal to the driver.

2. The display device according to claim 1,

wherein plural light sensors arranged so as to correspond to plural regions are grouped into blocks by a given number of sensors, and

the signal processing unit processes the luminance signals by each block.

3. The display device according to claim 2, further comprising:

a converter converting analog luminance signals outputted from the light sensors into digital luminance signals and supplying the signals into the signal processing unit,

wherein the converter is arranged so as to correspond to each block.

4. The display device according to claim 2, further comprising:

an amplifier amplifying the luminance signals outputted from the light sensors and supplying the signals to the signal processing unit,

wherein the amplifier is arranged so as to correspond to each block.

5. The display device according to claim 1,

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

6. The display device according to claim 5,

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

7. The display device according to claim 1,

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 after the first period, corrects the video signal in accordance with the comparison result and supplies the signal to the driver.

8. 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 light sensors,

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 plural regions each having plural pixel circuits,

the pixel circuit emits light in accordance with the video signal,

the light sensors are arranged so as to correspond to respective regions, grouped into blocks by a given number of sensors and outputs luminance signals in accordance with the light emission, and

the signal processing unit corrects the video signal in accordance with the luminance signals and supplies the video signal to the driver.

9. 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, a signal processing unit and a selector,

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 plural regions each having plural pixel circuits,

the pixel circuit emits light in accordance with the video signal,

the light sensor is arranged with respect to each region and outputs a luminance signal in accordance with the light emission,

the selector supplies plural luminance signals to the signal processing unit by switching the signals, and

the signal processing unit corrects the video signal in accordance with the luminance signals and supplies the video signal to the driver.

10. 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 light sensors,

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 plural regions each having plural pixel circuits,

the pixel circuit emits light in accordance with the video signal,

the light sensors are arranged so as to correspond to respective regions, grouped into blocks by a given number of sensors and outputs luminance signals in accordance with the light emission, and

the signal processing unit corrects the video signal in accordance with the luminance signals and supplies the video signal to the driver.