LED light bulb and LED light-emitting strip being capable of emitting 4TT light

• US 9,261,242 B2
• Filed: 02/29/2012
• Issued: 02/16/2016
• Est. Priority Date: 09/08/2010
• Status: Active Grant

• Current Assignee: Zhejiang Ledison Optoelectronics Co. Ltd.
• Original Assignee: Zhejiang Ledison Optoelectronics Co. Ltd.
• Inventors: Ge, Shichao, Liu, Huabin, Ge, Tiehan
• Primary Examiner(s): Hollweg, Thomas A
• Assistant Examiner(s): RAABE, CHRISTOPHER M
• Application Number:
  US13/408,936
• Publication Number:
  US 20130058080A1
• Time in Patent Office: 1,448 Days
• Field of Search: 313/498
• US Class Current: 1/1
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/66 Details of globes or covers forming part of the light source
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 19/0035 the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
• CPC Class Codes: F21V 19/005 by permanent fixing means, e.g. gluing, riveting or embedding in a potting compound
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• 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: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• 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: H05B 45/357 specially adapted for retrofit LED light sources

Abstract

The present invention discloses a LED light bulb, comprising: a LED light bulb shell; a core column with an exhaust tube and a bracket; at least one LED light emitting strip with LED chips therein emitting 4π light; a driver; and an electrical connector, wherein the LED light bulb shell is vacuum sealed with the core column so as to form a vacuum sealed chamber, which is filled with a gas having a low coefficient of viscosity and a high coefficient of thermal conductivity, the bracket and the LED light emitting strips fixed on the bracket are housed in the vacuum sealed chamber, the LED light emitting strip is in turn electrically connected to the driver, the electrical connector, while the electrical connector is used to be electrically connected to an external power supply, so as to light the LED light emitting strips. In addition, the present invention also provides the LED light emitting strips with LED chips emitting 4π light, as used in the LED light bulb.

Claims

1. A LED light bulb, comprising:

a LED light bulb shell;

a core column with an exhaust tube and a bracket;

at least one LED light emitting strip with a plurality of LED chips mounted thereon in a manner that permits the LED light bulb to emit 4 π

light;

a driver; and

an electrical connector, wherein the LED light bulb shell is vacuum sealed with the core column so as to form a vacuum sealed chamber, which is filled with a gas having a low coefficient of viscosity and a high coefficient of thermal conductivity, wherein the bracket and the LED light emitting strips fixed on the bracket are housed in the vacuum sealed chamber,

the LED light emitting strips being connected in series or in series and parallel, and arrangement of the LED light emitting strips is in the form of V, W, column, cone, or plane;

each of the LED light emitting strips having one LED electrode lead wire at each of two ends, with a first end of each of the LED electrode lead wires connected to one of the plurality of LED chips of the LED light emitting strips by an electrical connection wire, while a second end of each of the LED electrode lead wires is connected to a LED electrode lead wire of another LED light emitting strip by a metal wire or to an electrical power lead of the LED light bulb,

wherein the LED light emitting strips are supported within the LED light bulb by fixing the metal wires on a pillar of the core column.

2. The LED light bulb of claim 1, wherein the LED light bulb she is capable of transmitting light and connected to the electrical connector directly or by a connecting piece.

3. The LED light bulb of claim 1, wherein the gas having a low coefficient of viscosity and a high coefficient of thermal conductivity includes He, H₂, and a mixed gas of He and H₂, and at room temperature the gas has a gas pressure in the range of 50-1520 Torrs.

4. The LED light bulb of claim 1, wherein each of the at least one LED light emitting strips has at least one series of LED chips connected in series in such a manner that the PN junctions therein have a same direction, and the number of the LED chips is sufficient large such that their driving voltage is close to an external driving voltage after LED light emitting strips are connected in series or in parallel and series.

5. The LED light bulb of claim 1, wherein the respective LED light emitting strips are interlace with each other, so that any two strips of the LED light emitting strips are not located in a same plane, so as to avoid generating shadow on the LED light bulb she caused by blocking light emitted from one of the LED light emitting strips by means of another LED light emitting strip.

6. The LED light bulb of claim 1, wherein the LED light emitting strips interlace with each other so as to be located in diagonal lines of respective faces of a virtual polyhedral column or polyhedral truncated cone.

7. The LED light bulb of claim 1, wherein the LED light emitting strip with the LED chips emitting 4 π

light, comprises a transparent substrate and at least one series of the LED chips installed on the transparent substrate and connected in series in such a manner that the PN junctions therein have a same direction, and the LED chips having transparent chip substrates.

8. The LED light bulb of claim 7, further comprising an electrode leading device of the LED chips provided at two ends of the transparent substrate.

9. The LED light bulb of claim 8, further comprising a fixing means for fixing the electrode leading device at the two ends of the transparent substrate, and wherein the fixing means is made of high temperature glue, plastics, silver slurry or low melting glass.

10. The LED light bulb of claim 7, wherein the LED chips are blue-light or ultra-violet LED chips, RGB three primary colors LED chips or multi-primary colors LED chips.

11. The LED light bulb of claim 7, wherein a part of the LED chips are blue-light LED chips while the other part of the LED chips are red-light LED chips.

12. The LED light bulb of claim 10, further comprising a luminescent powder layer disposed around the LED chips and the transparent substrate installed with the LED chips.

13. The LED light bulb of claim 1, wherein the plurality of LED light emitting strips comprise four LED light emitting strips connected in series with third and fourth LED light emitting strips being connected intermediate the first and second LED light emitting strips and the metal wire comprises first, second, and third metal wire portions with:

the first metal wire portion interconnecting the LED electrode leadwire at the second end of the first LED light emitting strip with the LED electrode leadwire at the second end of the third LED light emitting strip;

the second metal wire portion interconnecting the LED electrode leadwire at the second end of the third LED light emitting strip with the LED electrode leadwire at the second end of the fourth LED light emitting strip; and

the third metal wire portion interconnecting the LED electrode leadwire at the second end of the fourth LED light emitting strip with the LED electrode leadwire at the second end of the second LED light emitting strip, to permit unidirectional DC current flow through a first electrical power lead, the first LED light emitting strip, the first metal wire portion, the third LED light emitting strip, the second metal wire portion, the fourth LED light emitting strip, the third metal wire portion, the second LED light emitting strip, and a second electrical power lead.