Backlight adjustment system
First Claim
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1. A system for lighting an electronic display, the system comprising:
- an electronic display with a viewing surface and a backlight;
a power source operatively connected to said backlight such that the result of an increase in power to said backlight is an increase in the amount of illumination output from the backlight, and the result of a decrease in power to said backlight is a decrease in the amount of illumination output from said backlight;
a sensor adapted to measure ambient light;
a sensor adapted to measure light emitted by said backlight; and
a software driver in operative communication with said sensors and said power source;
wherein the software driver is configured to access a database indicating a range of a preferred amount of backlight illumination for a given amount of ambient light, to automatically increase the power of said power source when the amount of backlight illumination is below said preferred illumination range for the sensed amount of ambient light at a given time, and to decrease the power of said power source when the amount of backlight illumination is above said preferred illumination range for the sensed amount of ambient light at a given time.
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Abstract
A preferred embodiment relates to controlling the amount of backlight power in an electronic display to account for the temperature in the backlight cavity. Another embodiment relates to a system for controlling the amount of backlight based on both the temperature of the backlight and the amount of ambient light.
209 Citations
12 Claims
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1. A system for lighting an electronic display, the system comprising:
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an electronic display with a viewing surface and a backlight; a power source operatively connected to said backlight such that the result of an increase in power to said backlight is an increase in the amount of illumination output from the backlight, and the result of a decrease in power to said backlight is a decrease in the amount of illumination output from said backlight; a sensor adapted to measure ambient light; a sensor adapted to measure light emitted by said backlight; and a software driver in operative communication with said sensors and said power source; wherein the software driver is configured to access a database indicating a range of a preferred amount of backlight illumination for a given amount of ambient light, to automatically increase the power of said power source when the amount of backlight illumination is below said preferred illumination range for the sensed amount of ambient light at a given time, and to decrease the power of said power source when the amount of backlight illumination is above said preferred illumination range for the sensed amount of ambient light at a given time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for lighting an electronic display device having a viewing surface and backlight, the steps comprising:
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setting a maximum operating temperature for said backlight; storing a range of a preferred amount of backlight illumination for a given amount of ambient light; measuring a temperature of the backlight; measuring an amount of ambient light; calculating a light ratio; and dimming the backlight slightly when the temperature of the backlight exceeds the maximum operating temperature or the amount of backlight illumination is too high for the amount of ambient light. - View Dependent Claims (9)
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10. A method for controlling the backlight in an electronic display device having a viewing surface and a backlight, the steps comprising:
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providing a power source which sends power to the backlight; providing a sensor which measures an operating temperature of said display device; providing a software driver which is operatively in communication with said power source and said sensor; storing a preferred operating temperature range for said display device; and providing electrical signals to the power source through said software driver to decrease the power to the backlight when said operating temperature exceeds said preferred operating temperature range. - View Dependent Claims (11, 12)
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Specification