Portable terminal and display control method
First Claim
1. A portable terminal, comprising:
- a display;
a backlight that illuminates the display; and
at least one processor that,when a residual battery quantity of the portable terminal becomes equal to or less than a first threshold value, begins adjusting illuminance of the backlight based on an image that is displayed on the display, and,when the residual battery quantity of the portable terminal becomes equal to or less than a second threshold value which is less than the first threshold value, determines an image parameter to be changed based on an application being executed on the portable terminal, and changes the determined image parameter so as to darken the image that is displayed on the display by at least performing a grayscale transform on the image to increase an amount of black in the image so as to reduce power consumption by the portable terminal.
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Accused Products
Abstract
A mobile phone 10 comprises a display 14 provided with an LED (46) that functions as a backlight, a display driver (42), etc. The display driver has a CABC (Content Adaptive Brightness Control) function to adjust illuminance of the backlight, an image quality of an image to be displayed, etc. based on the image that is displayed on the display 14. If a residual battery quantity of a secondary battery (58) becomes equal to or less that a first threshold value, for example, the CABC function is rendered in an enabled state. Furthermore, if the residual battery quantity becomes equal to or less that a second threshold value, an image parameter such as brightness, contrast, a gamma value, chroma saturation, etc. is changed such that the image that is output to the display driver becomes darker.
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Citations
12 Claims
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1. A portable terminal, comprising:
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a display; a backlight that illuminates the display; and at least one processor that, when a residual battery quantity of the portable terminal becomes equal to or less than a first threshold value, begins adjusting illuminance of the backlight based on an image that is displayed on the display, and, when the residual battery quantity of the portable terminal becomes equal to or less than a second threshold value which is less than the first threshold value, determines an image parameter to be changed based on an application being executed on the portable terminal, and changes the determined image parameter so as to darken the image that is displayed on the display by at least performing a grayscale transform on the image to increase an amount of black in the image so as to reduce power consumption by the portable terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A display control method in a portable terminal that comprises a display and a backlight that illuminates the display, the method comprising a processor:
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when a residual battery quantity of the portable terminal becomes equal to or less than a first threshold value, beginning adjustment of illuminance of the backlight based on an image that is displayed on the display; and
,when the residual battery quantity of the portable terminal becomes equal to or less than a second threshold value, determining an image parameter to be changed based on an application being executed on the portable terminal, and changing the determined image parameter so as to darken the image that is displayed on the display by at least performing a grayscale transform on the image to increase an amount of black in the image so as to reduce power consumption by the portable terminal.
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Specification