Lighting system and method
First Claim
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1. A lighting system for driving light bulbs having a lower voltage tolerance than the voltage supply to the system, comprising:
- a pulse wave modulator converter supplied with a required voltage from a system source voltage supply of the system for regulating an average output signal of the pulse wave modulator converter supplied to a register to selectively connect the output signal of the pulse wave modulator converter to a light bulb selected by the converter supply from a plurality of light bulbs, each light bulb having a lower voltage tolerance than the system voltage, the register and converter synchronised via a clock source, wherein the converter drives a single light bulb at any one time even with a variable PWM mark-space ratio.
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Abstract
A lighting system and method (1) is disclosed having a pulse-width modulation (PWM) lighting system and method for use in environments where the PWM ratio is variable, for example though not exclusively, in 42V and/or dual-voltage electrical systems in automotive applications.
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Citations
10 Claims
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1. A lighting system for driving light bulbs having a lower voltage tolerance than the voltage supply to the system, comprising:
a pulse wave modulator converter supplied with a required voltage from a system source voltage supply of the system for regulating an average output signal of the pulse wave modulator converter supplied to a register to selectively connect the output signal of the pulse wave modulator converter to a light bulb selected by the converter supply from a plurality of light bulbs, each light bulb having a lower voltage tolerance than the system voltage, the register and converter synchronised via a clock source, wherein the converter drives a single light bulb at any one time even with a variable PWM mark-space ratio. - View Dependent Claims (2, 3, 9)
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4. A lighting method for driving light bulbs having a lower voltage tolerance than the voltage supply to the system, comprising the steps or:
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supplying a required voltage from system source voltage from a system source voltage supply;
regulating an average output signal from a pulse wave modulator converter supplied with the system source voltage from the source system supply;
supplying the regulated average output signal to a register, the register and converter synchronised via a clock source; and
selectively connecting the output signal of the pulse wave modulator converter from the register to a single light bulb at any one time from a plurality of light bulbs, even with a variable PWM mark-space ratio, wherein each light bulb having a lower voltage tolerance than the system voltage supply. - View Dependent Claims (5, 6, 10)
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7. A lighting system substantially as hereinbefore described and with reference to the drawings.
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8. A lighting method substantially as hereinbefore described and with reference to the drawings.
Specification