Modulated intensity flasher for vehicle brake light with lockout
First Claim
1. A control system for modulating a brake light of an automobile for enhanced display indication of braking of the automobile comprising:
- an integral modulation unit sized to be disposed within a casing of the brake light and interposed between a lamp of the brake light and an energy supply;
wherein the modulation unit includes means for sequentially adjusting power from the energy supply to the lamp for a first predetermined time interval concurrent with the braking of the automobile for generating a desired brightening and dimming of the lamp, and continuously supplying a constant power to the lamp after expiration of the first predetermined time interval during continued braking; and
, wherein a lockout timer precludes the sequential adjusting by the modulation unit for a second predetermined time interval after release of the braking for avoiding repetitive flashing in stop and go traffic.
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0 Petitions
Accused Products
Abstract
A method and apparatus for brightening and dimming a brake light of automotive vehicle for enhanced display indication of braking includes a pulse width modulation unit to be electrically connected to a brake lamp for sequentially modulating the supply energy to the lamp to generate a brightening and dimming of the lamp. A time extent of the modulation is detected so that the modulation can be stopped after a preselected time period and the light will be continually on as in a conventional braking operation After the brake is released by the operator, a second preselected time period for locking out the sequential interrupting is timed down, for avoiding repetitive flashing during stop-and-go traffic.
9 Citations
13 Claims
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1. A control system for modulating a brake light of an automobile for enhanced display indication of braking of the automobile comprising:
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an integral modulation unit sized to be disposed within a casing of the brake light and interposed between a lamp of the brake light and an energy supply;
wherein the modulation unit includes means for sequentially adjusting power from the energy supply to the lamp for a first predetermined time interval concurrent with the braking of the automobile for generating a desired brightening and dimming of the lamp, and continuously supplying a constant power to the lamp after expiration of the first predetermined time interval during continued braking; and
,wherein a lockout timer precludes the sequential adjusting by the modulation unit for a second predetermined time interval after release of the braking for avoiding repetitive flashing in stop and go traffic. - View Dependent Claims (2, 3)
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4. A method of operating an interval modulator comprising a brake light of a vehicle for improved indication of braking of the vehicle, comprising steps of:
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detecting the braking of the vehicle by a supply of energy to the brake light coincident with the braking;
sequentially adjusting the supply of energy via a modulator connected to the light for generating a brightening and dimming of the light during the braking;
detecting a time extent of the adjusting;
stopping the adjusting after a preselected time period so that the light is continually on during the braking;
after release of the braking, detecting a second preselected time period for locking out the sequentially adjusting for avoiding repetitive flashing during stop and go traffic.
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5. A brake light comprising:
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a first region operative as a conventional brake light;
a second region separately controlled from the first region, a controller operative to time a braking event and a period between braking events and to selectively modulate the second region based on the timing of the braking even and a period between braking events. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A brake light controller operative to modulate a current through a light source, the brake light controller comprising:
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a pulse width modulator operative to selectively modulate an average current through the light source;
a lockout timer operative to prevent the pulse width modulator from modulating the average current through the light source if the current through the light source had been modulated recently; and
,a modulation interval timer operative to limit a length of time the pulse width modulator modulates the average current through the light source - View Dependent Claims (12, 13)
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Specification