Led and led lamp

• US 20050068776A1
• Filed: 12/30/2002
• Published: 03/31/2005
• Est. Priority Date: 12/29/2001
• Status: Active Grant

• Current Assignee: Mane Lou
• Original Assignee: Mane Lou
• Inventors: Ge, Shichao
• Granted Patent: US 7,497,596 B2
• Time in Patent Office: Days
• US Class Current: 362/296.80
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/505 of reflectors
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/78 with helically or spirally arranged fins or blades
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 7/06 with parabolic curvature
• CPC Class Codes: F21W 2111/02 for roads, paths or the like
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H01L 33/62 : Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H01L 33/642 : characterized by the shape
• CPC Class Codes: Y10S 362/80 : Light emitting diode

Abstract

This invention relates to a light emitting diode (LED) and a LED lamp consisted of LEDs. The LED comprises at least one LED chip. The LED is mounted on a high heat conductivity base and is connected to an applied power supply through a circuit board. The LED chip also has a transparent medium layer on it. The base top surface acts as a light reflective surface, or a light reflective surface is provided around the base, the LED comprises a screw extended downwards from the base bottom or a screw hole in the base bottom to connect the LED to a heat sink mechanically. The LED is electrically connected to a driving circuit through its outgoing wires. The driving circuit is in turn electrically connected to an electrical connector through its housing. A LED lamp can be fabricated after the LED is enclosed in a transparent bulb housing. The LED has high efficiency, high power and long lifetime and can be used to fabricate LED traffic lamps, LED plane light sources, etc.

Claims

1. A LED, comprising:

At least one led chip mounted on a base of high heat conductivity, the led chip is electrically connected to an applied power supply through a circuit board and has transparent medium layer on it, and the base top surface acts as a light reflective surface or a light reflective surface is provided around the base, wherein, circuit boards are provided on or around the base.

2. The LED according to claim 1, wherein, at least one screw or screw hole is provided on or in the base bottom to mechanically connect the base to a heat sink.

3. The LED according to claim 1, further comprising a light reflector at front of the LED chip.

4. The LED according to claim 1, wherein, the transparent medium is optical glue and a lens.

5. The LED according to claim 1, wherein, the LED chips are a plurality of LED chips emitting the same color light or different color light, the chips are connected to each other in a serial or/and parallel form.

6. The LED according to claim 1, wherein, the base is a metal base, an ultra-high heat conductivity tube or an assembly of a metal base and ultra-high heat conductivity tube under the metal base.

7. The LED according to claim 3, wherein, the angle between the light reflecting surface and the LED axis is an angle from 10°

to 70°

.

8. The LED according to claim 4, further comprising light converting material in the optical glue or between the optical glue and the lens.

9. A LED lamp consisted of the LEDs of claim 1, comprising:

At least one LED, mechanically connected to the heat sink through screws or screw holes on or in the base bottom of the LED;

A driving circuit, to which outgoing leads of the LEDs are connected; and

Transparent bulb housing mounted over the LED.

10. The LED lamp according to claim 9, wherein, the electrical connector is a double-leg bayonet lamp head, multi-leg bayonet lamp head or a screw lamp head.

11. The LED lamp according to claim 9, wherein, the transparent housing is a transparent, colored or scattering bulb housing made of glass or plastic.

12. The LED lamp according to claim 9, wherein, a light converting material layer is coated on the inner surface of the bulb housing.

13. The LED lamp according to claim 9, wherein, the heat sink has heat dispersing flanges on it.

14. The LED lamp of claim 13, wherein, the heat sink has a single heat dispersing gyroidal flange or a plurality of gyroidal heat dispersing flanges.

15. The LED lamp according to claim 13, wherein, the inner surface of the heat sink is a light reflection surface.

16. The LED lamp according to claim 15, wherein, the inner surface is cylindrocanical or parabolic.

17. A LED traffic lamp, wherein, at least one LED is mounted on the heat sink near the focus of the parabolic light reflector of a traffic lamp, the divergence angle of the LED is an angle in a range between 3°

and 60°

, the light emitted by some of the LEDs is emitted outside through the transparent window of the traffic lamp, the remaining light is emitted outside after reflection from the parabolic reflector of the traffic lamp to obtain a desired focus.

18. A LED plane light source, wherein, at least one LED is mounded on a heat sink having a flat heat dispersing plate, the radiator sink is located on the back side of and around the light guiding plate of a back illumination light source for a plane light source or liquid crystal display, light reflectors are disposed on the two sides of or around the LED.

19. The LED plane light source according to claim 18, wherein, the LEDs emit the same color light or different color light.