VEHICULAR LAMP

• US 20100277939A1
• Filed: 04/20/2010
• Published: 11/04/2010
• Est. Priority Date: 04/30/2009
• Status: Active Grant

• Current Assignee: Koito Manufacturing Company Limited
• Original Assignee: Koito Manufacturing Company Limited
• Inventors: Komatsu, Motohiro, Sazuka, Kiyoshi, Watanabe, Shigeyuki, Serizawa, Hiroyuki, Ishida, Hiroyuki
• Granted Patent: US 9,080,738 B2
• Time in Patent Office: Days
• US Class Current: 362/516
• CPC Class Codes: F21S 41/143 the main emission direction of the LED being parallel to the optical axis of the illuminating device
• CPC Class Codes: F21S 41/148 the main emission direction of the LED being perpendicular to the optical axis
• CPC Class Codes: F21S 41/151 arranged in one or more lines
• CPC Class Codes: F21S 41/255 Lenses with a front view of circular or truncated circular outline
• CPC Class Codes: F21S 41/275 Lens surfaces, e.g. coatings or surface structures
• CPC Class Codes: F21S 41/28 Cover glass
• CPC Class Codes: F21S 45/10 Protection of lighting devices cooling of lighting devices F21S45/40; waterproofing of lighting devices F21S45/50
• CPC Class Codes: F21V 7/24 characterised by the material
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A vehicular lamp comprising includes a light-emitting diode that is used as a light source and that emits light; and a light transmitting member that is arranged in a path of the emitted light and through which the light is passed. The light transmitting member shields the light-emitting diode from infrared rays that travel in an opposite direction to a traveling direction of the light.

Claims

1. A vehicular lamp comprising:

a light-emitting diode that is used as a light source and that emits light; and

a light transmitting member that is arranged in a path of the emitted light and through which the light is passed, wherein

an infrared ray reflective film is formed on the light transmitting member.

2. The vehicular lamp according to claim 1, further comprising:

a circuit board on which the light-emitting diode is mounted, wherein

the light transmitting member is a protective cover that is arranged on the circuit board to cover and protect the light-emitting diode.

3. The vehicular lamp according to claim 1, further comprising:

a lamp body that is open at one side, wherein

the light transmitting member is an outer cover that is attached to the lamp body to close the opening,

the lamp body and the outer cover constitute a lamp casing,

a plurality of lamp units each having the light-emitting diode are arranged inside the lamp casing, and

the infrared ray reflective film is formed at a portion of the outer cover, through which light, emitted from the light-emitting diode of the lamp unit having the smallest irradiated area among the plurality of lamp units, passes.

4. The vehicular lamp according to claim 1, further comprising:

a projection lens that disperses the emitted light, wherein

the light transmitting member is arranged so that the dispersed light passes through the light transmitting member.

5. The vehicular lamp according to claim 1, wherein the infrared ray reflective film is formed on a surface of the light transmitting member, adjacent to the light-emitting diode.

6. A vehicular lamp comprising:

a light-emitting diode that is used as a light source and that emits light; and

a light transmitting member that is arranged in a path of the emitted light and through which the light is passed, wherein

the light transmitting member contains an infrared ray absorbent.

7. The vehicular lamp according to claim 6, further comprising:

a circuit board on which the light-emitting diode is mounted, wherein

the light transmitting member is a protective cover that is arranged on the circuit board to cover and protect the light-emitting diode.

8. The vehicular lamp according to claim 6, further comprising:

a lamp body that is open at one side, wherein

the light transmitting member is an outer cover that is attached to the lamp body to close the opening,

the lamp body and the outer cover constitute a lamp casing,

a plurality of lamp units each having the light-emitting diode are arranged inside the lamp casing, and

a portion of the outer cover contains the infrared ray absorbent, and light, emitted from the light-emitting diode of the lamp unit having the smallest irradiated area among the plurality of lamp units, passes through the portion of the outer cover.

9. The vehicular lamp according to claim 6, further comprising:

a projection lens that disperses the emitted light, wherein

the light transmitting member is arranged so that the dispersed light passes through the light transmitting member.

10. A vehicular lamp comprising:

a light-emitting diode that is used as a light source and that emits light; and

a light transmitting member that is arranged in a path of the emitted light and through which the light is passed, wherein

the light transmitting member shields the light-emitting diode from infrared rays that travel in an opposite direction to a traveling direction of the light.