Long life intelligent illuminated road marker
First Claim
1. An illuminated road marker, comprising a one piece housing formed of plastic, comprising a top plate and perimeter sides, wherein at least one perimeter side comprises a light transmission surface through which light can be transmitted, and wherein said top plate and said sides define a cavity in said housing;
- a plurality of light emitting diodes (LEDs) positioned within said cavity such that light produced by said LEDs is transmitted through the same light transmitting surface, wherein said plurality of LEDs are oriented at angles different by 2 to 15 degrees thereby increasing the visibility angle of said road marker;
a long life battery within said cavity that energizes said LEDs, wherein said battery tolerates trickle charging without deterioration;
at least one solar cell within said cavity adjacent said top plate, wherein said solar cell recharges said battery; and
electrical circuitry within said cavity configured to control charging of said battery.
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Accused Products
Abstract
Self-contained solar-powered long-life intelligent illuminated road markers are provided comprising a one-piece housing formed of optionally colored plastic capable of transmitting light. Light is reflected by reflective coating or generated internally by LED which is powered by a long life battery, the charging of which is controlled by electrical circuitry which comprises a peripheral interface controller. The electrical circuitry provides intelligent control for a variety of modes corresponding to diverse driving conditions, and can enter a low-power sleep mode to conserve battery life.
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Citations
42 Claims
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1. An illuminated road marker, comprising
a one piece housing formed of plastic, comprising a top plate and perimeter sides, wherein at least one perimeter side comprises a light transmission surface through which light can be transmitted, and wherein said top plate and said sides define a cavity in said housing; -
a plurality of light emitting diodes (LEDs) positioned within said cavity such that light produced by said LEDs is transmitted through the same light transmitting surface, wherein said plurality of LEDs are oriented at angles different by 2 to 15 degrees thereby increasing the visibility angle of said road marker;
a long life battery within said cavity that energizes said LEDs, wherein said battery tolerates trickle charging without deterioration;
at least one solar cell within said cavity adjacent said top plate, wherein said solar cell recharges said battery; and
electrical circuitry within said cavity configured to control charging of said battery. - View Dependent Claims (3, 8, 9, 10, 15, 18, 21, 22, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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23. An illuminated road marker comprising
a one piece housing formed of a plastic, comprising a top plate and perimeter sides, wherein at least one perimeter side comprises a light transmission surface through which light can be transmitted, and wherein said top plate and said sides define a cavity in said housing; -
a plurality of light emitting diodes (LEDs) positioned within said cavity such that light produced by said LEDs is transmitted through said light transmitting surface, wherein said LEDs include LEDs having different voltage requirements;
a long life battery within said cavity that energizes said LEDs, wherein said battery tolerates trickle charging without deterioration;
at least one solar cell within said cavity adjacent said top plate, wherein said solar cell recharges said battery; and
electrical circuitry within said cavity, wherein said electrical circuitry is configured to provide different voltages to said LEDs having different voltage requirements.
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42. An illuminated road marker, comprising
a one piece housing formed of plastic, comprising a top plate and perimeter sides, wherein at least one perimeter side comprises a light transmission surface through which light can be transmitted, and wherein said top plate and said sides define a cavity in said housing; -
a plurality of light emitting diodes (LEDs) positioned within said cavity such that light produced by said LEDs is transmitted through the same light transmitting surface a long life battery within said cavity that energizes said LEDs, wherein said battery tolerates trickle charging without deterioration;
at least one solar cell within said cavity adjacent said top plate, wherein said solar cell recharges said battery; and
electrical circuitry within said cavity configured to control charging of said battery;
wherein said LEDs are pulsed, and the duration of each pulse is shortened under low charge conditions.
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Specification