Self-luminous display apparatus, peak luminance adjustment apparatus, electronic apparatus, peak luminance adjustment method and program
View Patent ↗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.
1. A self-luminous display apparatus capable of variably controlling a peak luminance of a self-luminous panel in a unit of one frame, comprising:
a mean gradation value calculation section that calculates within a period of one frame unit mean gradation values of a video signal respectively in units of one frame;
a power consumption calculation section that determines standard peak luminances corresponding to the calculated mean gradation values and that calculates power consumption amounts consumed respectively based on the standard peak luminances and the calculated mean gradation values; and
a peak luminance adjustment section that adjusts the standard peak luminance based on the power consumption amounts calculated for at least two frames so that a total power consumption within a fixed period does not exceed a preset power amount,
wherein the power consumption calculation section calculates the power consumption amounts by multiplying the mean gradation value, a peak luminance magnification, and a reference peak luminance.
2. The self-luminous display apparatus according to claim 1 , wherein said peak luminance adjustment section calculates A/B×the peak luminance magnification as the standard peak luminance of a pertaining frame,
where A is an actual power consumption amount consumed within a reference period of the fixed period,
where B is a power consumption amount consumed within a remaining period of the fixed period, and
where said self-luminous display apparatus is lit with a same peak luminance over an overall period of the reference period.
3. The self-luminous display apparatus according to claim 1 , wherein the power consumption calculation section that determines peak luminance magnifications corresponding to the calculated mean gradation values by reading out from a correspondence table wherein combinations of several values of the mean gradation value and the peak luminance magnification are recorded.
4. The self-luminous display apparatus according to claim 1 , wherein the standard peak luminances are peak luminance magnifications that are predetermined based on magnifications applied to reference peak luminances.
5. A peak luminance adjustment apparatus for adjusting a peak luminance of a self-luminous panel in a unit of one frame, comprising:
a mean gradation value calculation section that calculates within a period of one frame unit mean gradation values of a video signal respectively in units of one frame;
a power consumption calculation section that determines standard peak luminances corresponding to the calculated mean gradation values and that calculates power consumption amounts consumed respectively based on the standard peak luminances and the calculated mean gradation values; and
a peak luminance adjustment section that adjusts the standard peak luminance based on the power consumption amounts calculated for at least two frames so that a total power consumption consumed within a fixed period does not exceed a preset power amount,
wherein the power consumption calculation section calculates the power consumption amounts by multiplying the mean gradation value, a peak luminance magnification, and a reference peak luminance.
6. An electronic apparatus which incorporates a peak luminance adjustment apparatus for adjusting a peak luminance of a self-luminous panel in a unit of one frame, comprising:
a mean gradation value calculation section that calculates mean gradation values of a video signal respectively in units of one frame;
a power consumption calculation section that determines standard peak luminances corresponding to the calculated mean gradation values and that calculates power consumption amounts consumed respectively based on the standard peak luminances and the calculated mean gradation values; and
a peak luminance adjustment section that adjusts the standard peak luminance based on the power consumption amounts calculated for at least two frames so that a total power consumption consumed within a fixed period does not exceed a preset power amount,
wherein the power consumption calculation section calculates the power consumption amounts by multiplying the mean gradation value, a peak luminance magnification, and a reference peak luminance.
7. A peak luminance adjustment method for adjusting a peak luminance of a self-luminous panel in a unit of one frame, comprising:
calculating within a period of one frame unit mean gradation values of a video signal respectively in units of one frame;
determining standard peak luminances corresponding to the calculated mean gradation values and calculating power consumption amounts consumed respectively based on the standard peak luminances and the calculated mean gradation values; and
adjusting the standard peak luminance based on the power consumption amounts calculated for at least two frames so that a total power consumption consumed within a fixed period does not exceed a preset power amount,
wherein calculating the power consumption amounts is a multiplication of the mean gradation value, a peak luminance magnification, and a reference peak luminance.
8. A non-transitory computer readable medium for adjusting a peak luminance of a self-luminous panel in a unit of one frame, the computer readable medium storing program code which when executed by a computer performs operations comprising:
calculating within a period of one frame unit mean gradation values of a video signal respectively in units of one frame;
determining standard peak luminances corresponding to the calculated mean gradation values and calculating power consumption amounts consumed respectively based on the standard peak luminances and the calculated mean gradation values; and
adjusting the standard peak luminance based on the power consumption amounts calculated for at least two frames so that a total power consumption consumed within a fixed period does not exceed a preset power amount,
wherein calculating the power consumption amounts is a multiplication of the mean gradation value, a peak luminance magnification, and a reference peak luminance.