LCD PLATEAU POWER CONSERVATION
First Claim
1. A method for reducing power consumed by an electronics device that includes a liquid crystal display device, the method comprising:
- altering video information for output on the liquid crystal display device to produce altered video information while a backlight included in the liquid crystal display device provides light at a first backlight luminance level;
changing the backlight to a second backlight luminance level; and
increasing transmissivity of altered video information when the backlight changes to the second backlight luminance level,wherein an aggregate output luminance formed by combining the first backlight luminance level and the altered video information is about equal to or less than a new aggregate output luminance formed by the second backlight luminance level and the video information that was altered to produce the new maximum luminance.
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Accused Products
Abstract
Described herein are power conservation systems and methods that reduce power consumption for an electronics device including a liquid crystal display (LCD). The LCD includes a backlight that offers multiple luminance levels, where each level consumes a different amount of power. The systems and methods alter video information while the backlight remains at a backlight luminance level. The alteration reduces luminance for the video information to produce new video information that can be presented at a lower backlight luminance level. Change to the lower backlight luminance level may then occur without significantly affecting aggregate luminance of the new video information, as perceived by a user. The LCD and electronics device consume less power at the lower luminance level.
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Citations
20 Claims
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1. A method for reducing power consumed by an electronics device that includes a liquid crystal display device, the method comprising:
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altering video information for output on the liquid crystal display device to produce altered video information while a backlight included in the liquid crystal display device provides light at a first backlight luminance level; changing the backlight to a second backlight luminance level; and increasing transmissivity of altered video information when the backlight changes to the second backlight luminance level, wherein an aggregate output luminance formed by combining the first backlight luminance level and the altered video information is about equal to or less than a new aggregate output luminance formed by the second backlight luminance level and the video information that was altered to produce the new maximum luminance. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for reducing power consumed by an electronics device that includes a liquid crystal display device, the system comprising:
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a monitoring apparatus designed or configured to monitor user activity in a display area for the liquid crystal display device; and a power conservation apparatus designed or configured to a) receive user activity information provided by the monitoring apparatus, b) alter video information for output on the liquid crystal display device to produce altered video information while a backlight included in the liquid crystal display device provides light at a first backlight luminance level, and c) increase transmissivity of altered video information when the backlight changes to a second backlight luminance level, wherein an aggregate output luminance formed by combining the first backlight luminance level and the altered video information is about equal to or less than a new aggregate output luminance formed by the second backlight luminance level and the video information that was altered to produce the new maximum luminance. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An electronics device comprising:
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a liquid crystal display device that includes a backlight offering multiple backlight luminance levels, wherein the liquid crystal display device changes power consumption with each backlight luminance level; and a power conservation apparatus designed or configured to a) alter video information for output on the liquid crystal display device to produce altered video information while a backlight included in the liquid crystal display device provides light at a first backlight luminance level, and b) increase transmissivity of altered video information when the backlight changes to a second backlight luminance level, wherein an aggregate output luminance formed by combining the first backlight luminance level and the altered video information is about equal to or less than a new aggregate output luminance formed by the second backlight luminance level and the video information that was altered to produce the new maximum luminance. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification