LED light bulb

• US 10,619,800 B2
• Filed: 09/11/2019
• Issued: 04/14/2020
• Est. Priority Date: 08/17/2015
• Status: Active Grant

• Current Assignee: Zhejiang Super Lighting Electric Appliance Company Limited
• Original Assignee: Zhejiang Super Lighting Electric Appliance Company Limited
• Inventors: Jiang, Tao, Li, Liqin, Fei, Heping, Yao, Wentao, Zhou, Lvhui, Wang, Cheng, Wang, Jin
• Primary Examiner(s): Gramling, Sean P
• Application Number:
  US16/566,905
• Publication Number:
  US 20200003368A1
• Time in Patent Office: 216 Days
• 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 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/90 Methods of manufacture
• 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 3/02 characterised by the shape
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21Y 2103/33 annular
• CPC Class Codes: F21Y 2103/37 U-shaped
• 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 2224/45014 Ribbon connectors, e.g. rectangular cross-section
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• 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

Abstract

A LED light bulb, consisting of: a bulb shell; a bulb base connected with the bulb shell; a driving circuit disposed in the bulb base; two conductive supports installed in the bulb shell and electrically connected to the driving circuit; a stem disposed in the bulb base; an LED filament module installed in the bulb shell and connected with the stem through the conductive support; at least one supporting arm comprising a hook end and a fixed end, the hook end extends radially from the stand for connecting with one of the connecting portions, and the fixed end is embedded into the stand.

Claims

1. An LED light bulb, consisting of:

a bulb shell;

a bulb base connected with the bulb shell;

a driving circuit disposed in the bulb base;

two conductive supports installed in the bulb shell and electrically connected to the driving circuit;

a stem disposed in the bulb base;

an LED filament module installed in the bulb shell and connected with the stem through the conductive supports, the LED filament module comprising;

a first connecting portion and a second connecting portion, the first and the second connecting portions electrically connected to the two conductive supports, both of the first connecting portion and the second connecting portion have a shape surrounding the center axle of the bulb base;

a plurality of LED filaments spaced from each other, wherein each of the LED filaments comprises a first conductive electrode and a second conductive electrode opposite to the first conductive electrode, the first connecting portion connected with the first conductive electrodes, the second connecting portion connected with the second conductive electrodes, each of the plurality of LED filaments comprises;

a plurality of LED chips, electrically connected together;

a flexible light conversion coating, coated on each side of the LED chips and a portion of the conductive electrodes, and exposing a portion of two of the conductive electrodes, and the flexible light conversion coating comprising a top layer and a base layer, wherein the base layer comprises at least one hard portion and at least one soft portion, the hard portions and the soft portions are arranged in a staggered manner, and the hard portions are harder than the soft portions; and

at least one supporting arm comprising a hook end and a fixed end, the hook end extends radially from the stem for connecting with one of the connecting portions, and the fixed end is embedded into the stem.

2. The LED light bulb of claim 1, wherein the hard portions are aligned with the LED chips and the conductive electrodes.

3. The LED light bulb of claim 2, wherein the LED filament module is disposed around the stem.