Peak intensity level control device, self light-emitting display device, electronic device, peak intensity level control method, and computer program

• US 20080150970A1
• Filed: 12/17/2007
• Published: 06/26/2008
• Est. Priority Date: 12/26/2006
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ozawa, Atsushi, Tada, Mitsuru
• Granted Patent: US 8,106,929 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• 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 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/2014 by modulation of the duration of a single pulse during which the logic level remains constant

Abstract

A peak intensity level control device that controls a peak intensity level in a self light-emitting display module of active matrix driving type is disclosed. The device includes: an average picture value calculation section that calculates an average picture value of display data to be supplied to the self light-emitting display module; a driving condition control section that controls, at a time of performing intensity-up driving with respect to the peak intensity level, a driving condition of the self light-emitting display module to be able to derive the peak intensity level suited for the average picture value; and a gamma change section that applies, at the time of performing the intensity-up driving with respect to the peak intensity level, gamma change to the display data not to increase power consumption compared with driving with the peak intensity level of a standard value.

Claims

1. A peak intensity level control device that controls a peak intensity level in a self light-emitting display module of active matrix driving type, the device comprising:

an average picture value calculation section that calculates an average picture value of display data to be supplied to the self light-emitting display module;

a driving condition control section that controls, at a time of performing intensity-up driving with respect to the peak intensity level, a driving condition of the self light-emitting display module to be able to derive the peak intensity level suited for the average picture value; and

a gamma change section that applies, at the time of performing the intensity-up driving with respect to the peak intensity level, gamma change to the display data not to increase power consumption compared with driving with the peak intensity level of a standard value.

2. The peak intensity level control device according to claim 1, wherein

the average picture value calculation section calculates the average picture value for an arbitrary frame.

3. The peak intensity level control device according to claim 1, wherein

the average picture value calculation section calculates the average picture value for the display data provided during a fixed length of time.

4. The peak intensity level control device according to claim 1, wherein

the average picture value calculation section calculates the average picture value for every frame.

5. The peak intensity level control device according to claim 1, wherein

the gamma change section

executes a gamma change process based on the average picture value of the display data designed for the self light-emitting display module.

6. The peak intensity level control device according to claim 1, wherein

the gamma change section

stops, at the time of the intensity-up driving with respect to the peak intensity level corresponding to the average picture value, when the power consumption shows a decrease compared with the driving with the standard value, the gamma change to the display data, and

applies, at the time of the intensity up driving with respect to the peak intensity level corresponding to the average picture value, when the power consumption shows an increase compared with the driving with the standard value, the gamma change to the display data to reduce an amount of increase of the power consumption.

7. A self light-emitting display device, comprising:

a self light-emitting display module with a pixel configuration of active matrix driving type;

an average picture value calculation section that calculates an average picture value of display data to be supplied to the self light-emitting display module;

a driving condition control section that controls, at a time of performing intensity-up driving with respect to the peak intensity level, a driving condition of the self light-emitting display module to be able to derive the peak intensity level suited for the average picture value; and

a gamma change section that applies, at the time of performing the intensity-up driving with respect to the peak intensity level, gamma change to display data not to increase power consumption compared with driving with the peak intensity level of a standard value.

8. The self light-emitting display device according to claim 7, wherein

a pixel is configured by an electroluminescent element.

9. An electronic device, comprising:

a self light-emitting display module with a pixel configuration of active matrix driving type;

a driving condition control section that controls, at a time of performing intensity-up driving with respect to a peak intensity level, a driving condition of the self light-emitting display module to be able to derive the peak intensity level suited for the average picture value;

a gamma change section that applies, at the time of performing the intensity-up driving with respect to the peak intensity level, gamma change to display data not to increase power consumption compared with driving with the peak intensity level of a standard value; and

a system control section.

10. A driving condition control method of controlling a peak intensity level in a self light-emitting display module of active matrix driving type, the method comprising the steps of:

calculating an average picture value of display data to be supplied to the self light-emitting display module;

controlling, at a time of performing intensity-up driving with respect to the peak intensity level, a driving condition of the self light-emitting display module to be able to derive the peak intensity level suited for the average picture value; and

applying, at the time of performing the intensity-up driving with respect to the peak intensity level, gamma change to display data not to increase power consumption compared with driving with the peak intensity level of a standard value.

11. A computer program for allowing a computer that controls a peak intensity level in a self light-emitting display module of active matrix driving type to execute:

a process for calculating an average picture value of display data to be supplied to the self light-emitting display module;

a process for controlling, at a time of performing intensity-up driving with respect to the peak intensity level, a driving condition of the self light-emitting display module to be able to derive the peak intensity level suited for the average picture value; and

a process for applying, at the time of performing the intensity-up driving with respect to the peak intensity level, gamma change to display data not to increase power consumption compared with driving with the peak intensity level of a standard value.