WHITE LED DEVICE

• US 20110103038A1
• Filed: 04/06/2010
• Published: 05/05/2011
• Est. Priority Date: 10/30/2009
• Status: Abandoned Application

• Current Assignee: Kingbright Electronic Co., Ltd.
• Original Assignee: Kingbright Electronic Co., Ltd.
• Inventors: Song, Wen-Joe
• Application Number:
  US12/754,676
• Publication Number:
  US 20110103038A1
• Time in Patent Office: Days
• US Class Current: 362/84
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21Y 2113/17 forming a single encapsulated light source
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• 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 2224/49113 the connectors connecting different bonding areas on the semiconductor or solid-state body to a common bonding area outside the body, e.g. converging wires
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• 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 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/54 having a particular shape

Abstract

An improved white LED device comprises at least one first LED component, at least one second LED component, and at least one translucent member. The first LED component emits a blue light having a peak wavelength of 440-470 nm; the second LED component emits a red light having the peak wavelength of 600-630 nm; and the translucent member contains at least one fluorescent substance scattered throughout the translucent member. The fluorescent substance is able to absorb some of the blue light, and emits yellow green light having the peak wavelength of 500-570 nm, wherein when the blue light and yellow green light are mixed, the CIE 1931 chromaticity diagram is represented by a polygon with color coordinates (0.20,0.50), (0.20,0.30), (0.29,0.30), and (0.40,0.50), furthermore, after mixing the red light, the blue light, and the yellow green light, the improved white LED device emits a white light with high color rendering, and a color temperature of the white light ranges between 2500-7000 K.

Claims

1. An improved white LED device comprising:

at least one first LED component, emitting a blue light having a peak wavelength ranging between 440-470 nm;

at least one second LED component, emitting a red light with the peak wavelength ranging between 600 and 630 nm, and

at least one translucent member, containing at least one fluorescent substance scattered throughout the translucent member, wherein an absorption spectrum of the fluorescent substance is consistent with the emission spectrum of the blue light from the first LED component, so that the fluorescent substance is able to absorb some of the blue light, and emitting a yellow green light with the peak wavelength ranging between 500 and 570 nm, and a CIE 1931 chromaticity diagram of mixing the blue light and the yellow green light representing a polygon with color coordinates (0.20, 0.50), (0.20, 0.30), (0.29, 0.30), and (0.40, 0.50), furthermore, blending the red light, the blue light, and the yellow green light, the improved white LED device emitting a white light with high color rendering, a color temperature of the white light ranging between 2500 and 7000 K.

2. The improved white LED device according to claim 1, further comprising:

at least one first electrode, connecting to the first LED component and the second LED component, and electrically connecting the first and second LED components to an external electrical device;

a plurality of metal wires, electrically coupling to the first LED component and the second LED component; and

at least one second electrode, electrically connecting to the first LED component and the second LED component via a plurality of metal wires, and electrically coupling the first LED component and the second LED component to the external electrical device.

3. The improved white LED device according to claim 2, wherein the first electrode, the first LED component, the second LED component, the plurality of metal wires, the second electrode, and the light translucent member are all enclosed in a shell.

4. The improved white LED device according to claim 2, wherein the first electrode, the first LED component, the plurality of metal wires, the second electrode, and the translucent member are all enclosed in a first shell, while the first electrode, the second LED component, the plurality of metal wires, the second electrode, and the translucent member are all enclosed in a second shell.

5. An improved white LED device, comprising:

a shell;

at least one first electrode, one end of the first electrode being covered by the shell and forming an installation site, and an opposite end of the first electrode extending outside the shell and connecting to an external electrical device;

at least one first LED component, being disposed on the installation site, the first LED component emitting a blue light;

at least one second LED component, being disposed on the installation site, the second LED component emitting a red light;

at least one second electrode, one end of the second electrode being covered by the shell, and an opposite end of the second electrode extending outside the shell and connecting to the external electrical device;

a plurality of metal wires, electrically coupling the first LED component and second LED component to the second electrode; and

a translucent member, being set on the installation site and enclosing the first LED component, the second LED component, and the plurality of metal wires, wherein the translucent member containing a fluorescent substance, which scattering within the translucent member, moreover, an absorption spectrum of the fluorescent substance cohering with an emission spectrum of the blue light emitted from the first LED component, so that the fluorescent substance is able to soak part of the blue light, and emitting a yellow green light, furthermore, the improved white LED device emitting a white light with high color rendering after mixing the blue light, the red light, and the yellow green light.

6. The improved white LED device according to claim 5, wherein the electrical device is a printed circuit board.

7. The improved white LED device according to claim 5, wherein the emission spectrum of the blue light has a peak wavelength ranging between 440 and 470 nm;

the emission spectrum of the yellow green light having the peak wavelength ranging between 500 and 570 nm; and

the emission spectrum of the red light having the peak wavelength ranging between 600 and 630 nm.