Self-luminous display apparatus, peak luminance adjustment apparatus, electronic apparatus, peak luminance adjustment method and program

• US 20070126672A1
• Filed: 11/22/2006
• Published: 06/07/2007
• Est. Priority Date: 11/25/2005
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Hasegawa, Hiroshi, Ozawa, Atsushi, Tada, Mitsuru
• Granted Patent: US 8,325,115 B2
• Time in Patent Office: Days
• US Class Current: 345/77
• 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 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/025 Reduction of instantaneous peaks of current
• CPC Class Codes: G09G 3/2014 by modulation of the duration of a single pulse during which the logic level remains constant
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

A self-luminous display apparatus, a peak luminance adjustment apparatus is disclosed wherein power to be consumed by a self-luminous display panel is compulsorily suppressed to a level within a prescribed range and consequently the life of a battery is maintained. A mean gradation value calculation section calculates a mean gradation value of a video signal inputted within a period of one frame. A power consumption calculation section determines a standard peak luminance corresponding to the calculated mean gradation value and calculates a power consumption amount to be consumed based on the standard peak luminance and the calculated mean gradation value. A peak luminance adjustment section adjusts the standard peak luminance so that a total value of the power consumption to be consumed within a fixed period of time may not exceed a preset power amount.

Claims

1. A self-luminous display apparatus capable of variably controlling a peak luminance of a face of a self-luminous panel in a unit of one frame, comprising:

a mean gradation value calculation section configured to calculate a mean gradation value of a video signal inputted within a period of one frame;

a power consumption calculation section configured to determine a standard peak luminance corresponding to the calculated mean gradation value and calculate a power consumption amount to be consumed based on the standard peak luminance and the calculated mean gradation value; and

a peak luminance adjustment section configured to adjust the standard peak luminance so that a total value of the power consumption to be consumed within a fixed period of time may not exceed a preset power amount.

2. The self-luminous display apparatus according to claim 1, wherein said peak luminance adjustment section calculates A/B×

standard peak luminance as the standard peak luminance after the adjustment, where A is an actual power consumption amount which can be consumed within a remaining period within a fixed period defined as a control unit, and B is a power consumption amount which can be consumed within the remaining period where said self-luminous display apparatus is lit with the same peak luminance over an overall period of the fixed period defined as a control unit.

3. The self-luminous display apparatus according to claim 1, wherein the standard peak luminance corresponding to the calculated mean gradation value is read out from a correspondence table wherein combinations of several values of the mean gradation value and the standard peak luminance are recorded.

4. A peak luminance adjustment apparatus for adjusting a peak luminance of a face of a self-luminous panel in a unit of one frame, comprising:

a mean gradation value calculation section configured to calculate a mean gradation value of a video signal inputted within a period of one frame;

a power consumption calculation section configured to determine a standard peak luminance corresponding to the calculated mean gradation value and calculate a power consumption amount to be consumed based on the standard peak luminance and the calculated mean gradation value; and

a peak luminance adjustment section configured to adjust the standard peak luminance so that a total value of the power consumption to be consumed within a fixed period of time may not exceed a preset power amount.

5. An electronic apparatus which incorporates a peak luminance adjustment apparatus for adjusting a peak luminance of a face of a self-luminous panel in a unit of one frame

a mean gradation value calculation section configured to calculate a mean gradation value of a video signal inputted within a period of one frame;

a power consumption calculation section configured to determine a standard peak luminance corresponding to the calculated mean gradation value and calculate a power consumption amount to be consumed based on the standard peak luminance and the calculated mean gradation value; and

a peak luminance adjustment section configured to adjust the standard peak luminance so that a total value of the power consumption to be consumed within a fixed period of time may not exceed a preset power amount.

6. A peak luminance adjustment method for adjusting a peak luminance of a face of a self-luminous panel in a unit of one frame, comprising the steps of:

calculating a mean gradation value of a video signal inputted within a period of one frame;

determining a standard peak luminance corresponding to the calculated mean gradation value and calculating a power consumption amount to be consumed based on the standard peak luminance and the calculated mean gradation value; and

adjusting the standard peak luminance so that a total value of the power consumption to be consumed within a fixed period of time may not exceed a preset power amount.

7. A computer program for causing a computer, which adjusts a peak luminance of a face of a self-luminous panel in a unit of one frame, to execute the steps of:

calculating a mean gradation value of a video signal inputted within a period of one frame;

determining a standard peak luminance corresponding to the calculated mean gradation value and calculating a power consumption amount to be consumed based on the standard peak luminance and the calculated mean gradation value; and

adjusting the standard peak luminance so that a total value of the power consumption to be consumed within a fixed period of time may not exceed a preset power amount.