Display device and electronic product

• US 20100118002A1
• Filed: 10/14/2009
• Published: 05/13/2010
• Est. Priority Date: 11/07/2008
• Status: Active Grant

• Current Assignee: JOLED Inc.
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Uchino, Katsuhide, Yamashita, Junichi
• Granted Patent: US 8,810,554 B2
• Time in Patent Office: Days
• US Class Current: 345/205
• CPC Class Codes: G09G 2300/0417 Special arrangements specific to the use of low carrier mobility technology
• CPC Class Codes: G09G 2300/0819 used for counteracting undesired variations, e.g. feedback or autozeroing
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/0861 with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: H10K 59/13 comprising photosensors that control luminance

Abstract

A display device includes: a screen unit; a drive unit; and a signal processing unit, and 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 drive unit allows plural pixel circuits belonging to different regions to simultaneously emit light, the pixel circuit emits light in accordance with the video signal, the light sensor outputs a luminance signal in accordance with the light emission and the signal processing unit corrects the video signal in accordance with the luminance signal and supplies the signal to the driver.

Claims

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 plural regions each having plural pixel circuits,

the drive unit allows plural pixel circuits belonging to different regions to simultaneously emit light,

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

the light sensor outputs a luminance signal in accordance with the light emission and

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

2. The display device according to claim 1,

wherein the screen unit arranges plural light sensors so as to correspond to plural regions, and

each light sensor outputs luminance signals in accordance with light emission of pixel circuits belonging to a corresponding region.

3. 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.

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 light.

5. 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.

6. 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 plural regions each having plural pixel circuits,

the drive unit allows plural pixel circuits belonging to different regions to simultaneously emit light,

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

the light sensor outputs a luminance signal in accordance with the light emission and

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