LED vehicle headlamp with electrochromic device
First Claim
1. A light emitting diode (LED) vehicle headlamp comprising:
- an LED light source;
at least one electrochromic device optically coupled to the LED light source, and the at least one electrochromic device having an alterable light transmission characteristics in response to voltage/current level applied thereto; and
a collimator positioned between the LED light source and the at least one electrochromic device to collimate and converge light emitted from the LED light source and direct light into the at least one electrochromic device;
wherein when a forward bias voltage/current is applied to the at least one electrochromic device, the visible light transmission of the at least one electrochromic device decreases accordingly to generate a first light intensity distribution pattern, and when a backward bias voltage/current is applied to the at least one electrochromic device, the visible light transmission of the at least one electrochromic device increases accordingly to generate a second light intensity distribution pattern different from the first light intensity distribution pattern.
1 Assignment
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Accused Products
Abstract
An LED vehicle headlamp includes an LED light source, at least one electrochromic device optically coupled to the LED light source, and a collimator positioned between the LED light source and the electrochromic device. The electrochromic device has an alterable light transmission characteristics in response to voltage/current level applied thereto. The collimator is configured for collimating and converging light emitted from the LED light source and directing light into the electrochromic device. When a forward bias voltage/current is applied to the electrochromic device, the visible light transmission of the electrochromic device decreases accordingly to generate a first light intensity distribution pattern, which is a low beam. When a backward bias voltage/current is applied to the electrochromic device, the visible light transmission of the electrochromic increases accordingly to generate a second light intensity distribution pattern (high beam) different from the first light intensity distribution pattern.
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Citations
20 Claims
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1. A light emitting diode (LED) vehicle headlamp comprising:
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an LED light source; at least one electrochromic device optically coupled to the LED light source, and the at least one electrochromic device having an alterable light transmission characteristics in response to voltage/current level applied thereto; and a collimator positioned between the LED light source and the at least one electrochromic device to collimate and converge light emitted from the LED light source and direct light into the at least one electrochromic device; wherein when a forward bias voltage/current is applied to the at least one electrochromic device, the visible light transmission of the at least one electrochromic device decreases accordingly to generate a first light intensity distribution pattern, and when a backward bias voltage/current is applied to the at least one electrochromic device, the visible light transmission of the at least one electrochromic device increases accordingly to generate a second light intensity distribution pattern different from the first light intensity distribution pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification