Patent ID: 8994524
Filing Date: 2015-03-31
Classification: B60Q,B60R,H05B,Y02B

Abstract:
1. An indication unit for vehicles, said indication unit comprising: a housing fixedly secured within an interior mirror, an exterior mirror or a camera housing; an LED housed within said housing; and an electrical circuit comprising: a first control circuit arranged in a vehicle that outputs an indicator signal comprising a series of pulses, wherein the series of pulses correspond to an active phase of the indicator signal, a second control circuit that receives the indicator signal and overlays a pulse sequence with a frequency of over 100 Hz onto each active phase portion of the indicator signal, the pulse sequence comprising a first pulse and following pulses subsequent to the first pulse, the first of the pulse sequence having an amplitude that is increased in relation to the following pulses of the pulse sequence, to produce a pulse width modulated indicator signal, and an LED driver circuit that receives the pulse width modulated indicator signal and drives the LED with the pulse width modulated indicator signal, wherein when the LED is driven with the pulse width modulated indicator signal, the active phase of the pulse width modulated indicator signal causes the LED to be pulsed at light intensities in the range of an intensity of the indicator signal and an amplitude of the first pulse of the pulse sequence, wherein the initial pulse of the active phase of the pulse width modulated indicator causes the LED to have an initial pulse of increased light intensity in relation to following pulses of the active phase of the pulse width modulated indicator signal in order to reduce an effective light intensity of the LED.