Mobile light
First Claim
1. A light that produces a high level of illumination without glare and that is capable of being powered by a DC voltage source, the light comprising:
- a high-intensity discharge (“
HID”
) lamp mounted within a housing, a lens mounted on the housing so as to enclose the lamp within the lens and housing, the lens being coated to diffuse light emitted from the lamp, a control circuit mounted within the housing and powered by the DC voltage, the control circuit comprising;
a switching circuit for switching the DC voltage to derive an AC voltage from the switched DC voltage, and a voltage multiplier circuit for multiplying the AC voltage'"'"'s peak value to a level capable of igniting the lamp, the AC voltage being applied to the lamp to maintain illumination of the lamp once the lamp is ignited.
6 Assignments
0 Petitions
Accused Products
Abstract
A mobile light is disclosed that produces a high level of illumination without glare using the DC power of a vehicle'"'"'s battery and charging system. The mobile light uses a high-intensity discharge lamp with a control circuit that initially ignites the lamp using a voltage multiplier circuit and that maintains illumination of the lamp using an FET switching circuit that applies a lower AC voltage to the lamp. The microprocessor also periodically adjusts the power delivered to the lamp to compensate for adverse conditions, such as high temperatures within the work light, or a high or low DC input voltage. The microprocessor also periodically senses the level of illumination provided by the lamp and adjusts the voltage applied to the lamp accordingly.
20 Citations
20 Claims
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1. A light that produces a high level of illumination without glare and that is capable of being powered by a DC voltage source, the light comprising:
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a high-intensity discharge (“
HID”
) lamp mounted within a housing,a lens mounted on the housing so as to enclose the lamp within the lens and housing, the lens being coated to diffuse light emitted from the lamp, a control circuit mounted within the housing and powered by the DC voltage, the control circuit comprising;
a switching circuit for switching the DC voltage to derive an AC voltage from the switched DC voltage, and a voltage multiplier circuit for multiplying the AC voltage'"'"'s peak value to a level capable of igniting the lamp, the AC voltage being applied to the lamp to maintain illumination of the lamp once the lamp is ignited. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A light that produces a high level of illumination without glare and that is capable of being powered by the DC voltage of a vehicle'"'"'s battery and charging system, the light comprising:
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a high-intensity discharge (“
HID”
) lamp mounted within a housing,a lens mounted on the housing so as to enclose the lamp within the lens and housing, the lens being coated to diffuse light emitted from the lamp, a control circuit mounted within the housing and powered by the DC voltage, the control circuit comprising;
a switching circuit for deriving an AC voltage from the DC voltage, a voltage multiplier circuit for multiplying the AC voltage'"'"'s peak value to a level capable of igniting the lamp, and a microprocessor for controlling the switching circuit to apply the peak AC voltage to the voltage multiplier circuit and to apply the AC voltage to the lamp to maintain illumination of the lamp once the lamp is ignited.
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20. A light that produces a high level of illumination without glare, the light comprising:
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a high-intensity discharge (“
HID”
) lamp mounted within a housing,a lens mounted on the housing so as to enclose the lamp within the lens and housing, the lens being coated with a translucent white paint to diffuse light emitted from the lamp, a dust filter mounted on the housing and at least one cooling fan mounted within the housing, the dust filter and the at least one cooling fan producing a positive pressure within the housing and lens that tends to keep dust from entering the housing and lens, a control circuit mounted within the housing and powered by DC voltage from a vehicle'"'"'s battery and charging system, the control circuit comprising;
a switching circuit for switching the DC voltage to derive an AC voltage from the DC voltage that is applied to the lamp to maintain illumination of the lamp once the lamp is ignited, a voltage multiplier circuit for multiplying a peak value of the switched DC voltage to a voltage level capable of igniting the lamp, and a microprocessor for controlling the switching circuit, the microprocessor controlling the frequency at which it switches the switching circuitry to control the AC voltage applied to the lamp, and thereby the illumination provided by the lamp, a voltage divider circuit whereby the microprocessor determines whether the input voltage is too low or too high, a photosensitive circuit whereby the microprocessor determines the amount of illumination the lamp is providing, and a temperature sensing circuit whereby the microprocessor determines whether the temperature in the light is too high.
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Specification