DISPLAY UNIT, IMAGE PROCESSING DEVICE, DISPLAY METHOD, AND ELECTRONIC APPARATUS

• US 20140176620A1
• Filed: 12/13/2013
• Published: 06/26/2014
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Yano, Tomoya, Funatsu, Yohei, Inoue, Yasuo
• Granted Patent: US 10,497,304 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/025 Reduction of instantaneous peaks of current
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]

Abstract

An image processing device includes a control section configured to determine, based on first luminance information for each display pixel, frame luminance information in a single frame and current information. The current information indicates a magnitude of a current that is expected to be consumed in displaying the single frame on a display section. The control section is configured to control, based on the frame luminance information and the current information, light-emitting luminance of the display section.

Claims

1. A display unit, comprising:

a display section including a plurality of display pixels; and

a control section configured to determine, based on first luminance information for each of the display pixels, frame luminance information in a single frame and current information, the current information indicating a magnitude of a current that is expected to be consumed in displaying the single frame on the display section, and control, based on the frame luminance information and the current information, light-emitting luminance of the display section.

2. The display unit according to claim 1, wherein the control section selectively switches between a first control and a second control, the first control controlling the light-emitting luminance, based on the frame luminance information, and the second control controlling the light-emitting luminance, based on the current information.

3. The display unit according to claim 2, wherein the control section determines a first gain from the frame luminance information and a second gain from the current information, and

selects the first control to control, based on the first gain, the light-emitting luminance when the first gain is lower than the second gain, and

selects the second control to control, based on the second gain, the light-emitting luminance when the second gain is lower than the first gain.

4. The display unit according to claim 3, wherein each of the display pixels includes a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, the first sub-pixel, the second sub-pixel, the third sub-pixel emitting respective three key color light beams, and the fourth sub-pixel emitting a light beam of a color different from each of the light beams of the respective first sub-pixel, the second sub-pixel, and the third sub-pixel.

5. The display unit according to claim 4, wherein the first luminance information includes three pieces of sub-luminance information corresponding to the respective first sub-pixel, the second sub-pixel, and the third sub-pixel, and

the control section determines second luminance information, based on the first luminance information and one of the first gain and the second gain, and controls the light-emitting luminance, based on the second luminance information.

6. The display unit according to claim 5, wherein the control section determines, based on the second luminance information, third luminance information that includes four pieces of sub-luminance information corresponding to the respective first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel, and controls the light-emitting luminance, based on the third luminance information.

7. The display unit according to claim 4, wherein the control section controls the light-emitting luminance by varying a rate of a luminescent period of each of the display pixels during a single frame period, based on one of the first gain and the second gain.

8. The display unit according to claim 7, wherein the first luminance information includes three pieces of sub-luminance information corresponding to the respective first sub-pixel, the second sub-pixel, and the third sub-pixel, and

the control section determines, based on the first luminance information, fourth luminance information that includes four pieces of sub-luminance information corresponding to the respective first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel, and

determines the current information, based on the fourth luminance information.

9. The display unit according to claim 2, wherein the control section selects the first control when a first total pixel current of the display pixels upon performing the first control is expected to be lower than a second total pixel current of the display pixels upon performing the second control, and

selects the second control when the first total pixel current is expected to be larger than the second total pixel current.

10. The display unit according to claim 1, wherein the control section acquires, based on the first luminance information, one of V information in an HSV color space and L information in an HLS color space, and determines the frame luminance information, based on that one of the V information and the L information.

11. The display unit according to claim 1, wherein the display section is an electroluminescence display section.

12. A display unit, comprising:

a display section including a plurality of display pixels; and

a control section configured to control light-emitting luminance of the display section to allow a total pixel current of the display pixels to be increased with an increase in S information in an HSV color space when the S information is equal to or less than a predetermined value, the S information being derived from luminance information for each of the display pixels, and to allow the total pixel current to be substantially constant when the S information is equal to or more than the predetermined value.

13. An image processing device, comprising

a control section configured to determine, based on first luminance information for each display pixel, frame luminance information in a single frame and current information, the current information indicating a magnitude of a current that is expected to be consumed in displaying the single frame on a display section, and control, based on the frame luminance information and the current information, light-emitting luminance of the display section.

14. A display method, comprising:

determining, based on first luminance information for each display pixel, frame luminance information in a single frame and current information, the current information indicating a magnitude of a current that is expected to be consumed in displaying the single frame on a display section; and

controlling, based on the frame luminance information and the current information, light-emitting luminance of the display section.

15. An electronic apparatus provided with a display unit and a control section configured to perform a control of operation on the display unit, the display unit comprising:

a display section including a plurality of display pixels; and

a control section configured to determine, based on first luminance information for each of the display pixels, frame luminance information in a single frame and current information, the current information indicating a magnitude of a current that is expected to be consumed in displaying the single frame on the display section, and control, based on the frame luminance information and the current information, light-emitting luminance of the display section.