System and method for controlling the operation parameters response to current draw
First Claim
1. A system for controlling the power consumption of an electronic display, the system comprising:
- a backlight power source in electrical communication with a display backlight;
a fan power source in electrical communication with a fan which is positioned so as to draw cooling air through an area of the display which requires cooling;
a temperature sensor placed in the area which requires cooling;
a display current draw measurement device which measures the overall draw of current from the entire display; and
a software driver receiving electrical data from the temperature sensor and display current draw measurement device and providing instructions to the backlight power source and fan power source.
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Accused Products
Abstract
A system and method for controlling the power consumption of an electronic display. A maximum current value may be selected where above this value the risk to damage to the display or local circuitry may be jeopardized. Ramp-wise and/or gradual controls of the display parameters such as fan speed and backlight levels may reduce the current draw during extreme situations and line voltage fluctuations. Embodiments allow the display to continue operation without risking an overload of the local circuit or damage to the display. Further embodiments may be used to limit the power consumption of a display in order to minimize energy usage. Several parameters can be measured and controlled simultaneously to provide a minimal amount of energy usage while minimizing any noticeable difference in images.
68 Citations
17 Claims
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1. A system for controlling the power consumption of an electronic display, the system comprising:
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a backlight power source in electrical communication with a display backlight; a fan power source in electrical communication with a fan which is positioned so as to draw cooling air through an area of the display which requires cooling; a temperature sensor placed in the area which requires cooling; a display current draw measurement device which measures the overall draw of current from the entire display; and a software driver receiving electrical data from the temperature sensor and display current draw measurement device and providing instructions to the backlight power source and fan power source. - View Dependent Claims (2, 3, 4, 5, 6, 11, 12, 13)
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7. A method for controlling the power consumption of a system having a display backlight, a fan which is positioned so as to draw cooling air through an area of the display which requires cooling, a temperature sensor placed in the area which requires cooling, a display current draw measurement device, a maximum current value (Cmax), and a maximum temperature value (Tmax), the method comprising the steps of:
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measuring the display current draw with the display current draw measurement device; measuring the temperature of the area which requires cooling with the temperature sensor; decreasing the power sent to the fan if the display current draw is greater than or equal to Cmax and the temperature is less than Tmax; and decreasing the power sent to the display backlight if the display current draw is greater than or equal to Cmax and the temperature is greater than or equal to Tmax. - View Dependent Claims (8, 9, 10)
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14. A method for controlling the power consumption of a display according to a maximum current value (Cmax)and a maximum temperature value (Tmax), the display having a backlight and a fan placed within an area of the display which requires cooling, the method comprising the steps of:
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measuring the display current draw; measuring the temperature of the area which requires cooling; decreasing the power sent to the fan if the display current draw measurement is greater than or equal to Cmax and the temperature measurement is less than Tmax; and decreasing the power sent to the display backlight if the display current draw measurement is greater than or equal to Cmax and the temperature measurement is greater than or equal to Tmax. - View Dependent Claims (15, 16, 17)
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Specification