Display device, electronic apparatus, and color conversion method
View Patent ↗According to an aspect, a display device includes an image display unit in which pixels each including a plurality of sub-pixels are arranged in a matrix, and a color converting unit that performs color conversion to reduce power consumption in the image display unit. The color converting unit does not perform the color conversion when total power consumption obtained by adding up the power consumption in the image display unit and power consumption in the color converting unit in a case where the color conversion is performed exceeds the power consumption in the image display unit in a case where the color conversion is not performed.
1. A display device comprising:
an image display unit in which pixels are arranged in a matrix, each of the pixels including a plurality of sub-pixels; and
a color converting unit that performs color conversion to reduce power consumption in the image display unit, wherein
the color converting unit does not perform the color conversion when total power consumption obtained by adding up the power consumption in the image display unit and power consumption in the color converting unit in a case where the color conversion is performed exceeds the power consumption in the image display unit in a case where the color conversion is not performed.
2. The display device according to claim 1 , wherein
the color conversion is processing to increase an amount of reduction in the power consumption in the image display unit with an increase in display luminance of an image displayed by the image display unit, and
the color converting unit is provided with a first luminance setting threshold corresponding to display luminance at which the total power consumption obtained by adding up the power consumption in the image display unit and the power consumption in the color converting unit in a case where the color conversion is performed in an entire display luminance range of the image display unit intersects with the power consumption in the image display unit in a case where the color conversion is not performed, and
the color converting unit does not perform the color conversion when a predetermined luminance setting value falls within a first luminance setting range that is a range smaller than the first luminance setting threshold.
3. The display device according to claim 2 , wherein
the color converting unit is provided with a second luminance setting threshold larger than the first luminance setting threshold, and
the color converting unit changes a color conversion level indicating a degree of a change in display quality caused by the color conversion based on the luminance setting value when the luminance setting value falls within a second luminance setting range that is a range equal to or larger than the first luminance setting threshold and equal to or smaller than the second luminance setting threshold.
4. The display device according to claim 3 , wherein
the color converting unit raises the color conversion level with an increase in the luminance setting value in the second luminance setting range.
5. The display device according to claim 2 , wherein
the color converting unit is provided with a second luminance setting threshold larger than the first luminance setting threshold, and
the color converting unit performs the color conversion in a time-division manner based on the luminance setting value within a range where a change in display quality caused by the color conversion is allowed when the luminance setting value falls within a second luminance setting range that is a range equal to or larger than the first luminance setting threshold and equal to or smaller than the second luminance setting threshold.
6. The display device according to claim 5 , wherein,
when performing the color conversion in the time-division manner in the second luminance setting range, the color converting unit performs the color conversion in units of a frame.
7. The display device according to claim 6 , wherein
the color converting unit performs the color conversion at a frame rate that prevents the total power consumption obtained by adding up the power consumption in the image display unit and the power consumption in the color converting unit from exceeding the power consumption in the image display unit in a case where the color conversion is not performed in the second luminance setting range.
8. The display device according to claim 6 , wherein
the color converting unit shifts a timing of the color conversion for each horizontal line or for each pixel in the image display unit in the second luminance setting range.
9. A color conversion method for an input signal supplied to a drive circuit of an image display unit in which pixels are arranged in a matrix, each of the pixels including a plurality of sub-pixels
the color conversion method comprising,
not performing color conversion to reduce power consumption in the image display unit when total power consumption obtained by adding up the power consumption in the image display unit and power consumption caused by the color conversion in a case where the color conversion is performed exceeds the power consumption in the image display unit in a case where the color conversion is not performed.