LED LAMP USING ULTRA-SMALL LED ELECTRODE ASSEMBLY

• US 20160172339A1
• Filed: 07/08/2014
• Published: 06/16/2016
• Est. Priority Date: 07/09/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: PSI Company Limited
• Inventors: Do, Young Rag
• Granted Patent: US 9,978,725 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• 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: H05K 1/0295 adapted for choosing between different types or different locations of mounted components
• CPC Class Codes: H05K 1/0296 Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295 H05K1/11 takes precedence; lay-out adapted to mounted component configuration H05K1/18
• CPC Class Codes: H05K 1/111 Pads for surface mounting, e.g. lay-out
• CPC Class Codes: H05K 2201/09236 Parallel layout layout of balanced signal pairs H05K1/0245; superposed layout H05K2201/09672
• CPC Class Codes: H05K 2201/09254 Branched layout
• CPC Class Codes: H05K 2201/09381 Shape of non-curved single flat metallic pad, land or exposed part thereof; Shape of electrode of leadless component notches in edge pads H05K2201/09181
• CPC Class Codes: H05K 2201/0939 Curved pads, e.g. semi-circular or elliptical pads or lands
• CPC Class Codes: H05K 2201/09427 Special relation between the location or dimension of a pad or land and the location or dimension of a terminal
• CPC Class Codes: H05K 2201/09954 More mounting possibilities, e.g. on same place of PCB, or by using different sets of edge pads
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 2201/10583 Cylindrically shaped component; Fixing means therefore
• CPC Class Codes: H05K 2201/10636 Leadless chip, e.g. chip capacitor or resistor
• CPC Class Codes: H05K 2201/10651 Component having two leads, e.g. resistor, capacitor
• CPC Class Codes: H05K 2203/048 Self-alignment during soldering; Terminals, pads or shape of solder adapted therefor
• CPC Class Codes: H05K 3/28 : Applying non-metallic protective coatings H05K3/0091 takes precedence; methods for intermediate insulating layers for build-up multilayer circuits H05K3/4673
• CPC Class Codes: H05K 3/3442 : having edge contacts, e.g. leadless chip capacitors, chip carriers
• CPC Class Codes: Y02P 70/50 : Manufacturing or production processes characterised by the final manufactured product

Abstract

Provided is an LED lamp using a nano-scale LED electrode assembly. The LED lamp using the nano-scale LED electrode assembly may solve limitations in which, when a nano-scale LED device according to the related art stands up and is three-dimensionally coupled to an electrode, it is difficult to allow the nano-scale LED device to stand up, and when the nano-scale LED devices are coupled to one-to-one correspond to electrodes different from each other, product quality is deteriorated. Thus, the nano-scale LED device having a nano unit may be connected to the two electrodes different from each other without causing defects, and light extraction efficiency may be improved due to the directivity of the nano-scale LED devices connected to the electrodes. Furthermore, deterioration in function of the LED lamp due to the defects of a portion of the nano-scale LEDs provided in the LED lamp may be minimized, and the LED lamp may have a flexible structure and shape by using the nano-scale LED electrode assembly of which a portion is deformable according to the used purpose or position of the LED lamp.

Claims

1. An LED map using a nano-scale LED electrode assembly, the LED lamp comprising:

a support body;

a base substrate provided in the support body; and

the nano-scale LED electrode assembly comprising a first electrode disposed on the base substrate, a second electrode spaced apart from the first electrode on the same plane as the first electrode, and a plurality of nano-scale LED devices connected to both of the first and second electrodes,

wherein each of the nano-scale LED devices comprises an insulation film, which covers the whole outer surface of a portion of at least the active layer to prevent an electrical short-circuit occurring due to contact between the active layer of the nano-scale LED device and the electrode line from occurring, an outer surface thereof.

2. The LED lamp of claim 1, wherein the support body has a cup shape,

the LED lamp further comprises a phosphor provided in the the support body, the phosphor being excited by light irradiated from the nano-scale LED device, and

the nano-scale LED electrode assembly comprises one of an UV LED, a blue LED, a green LED, and a red LED.

3. The LED lamp of claim 1, wherein the number of nano-scale LED devices is about 2 to about 100,000 per a unit area (100×

100 μ

m²) of the nano-scale LED electrode assembly.

4. The LED lamp of claim 1, wherein the nano-scale LED device has a length of about 100 nm to about 10 μ

m and an aspect ratio of about 1.2 to about 100.

5. The LED lamp of claim 1, wherein a width X of the first electrode, a width Y of the second electrode, a distance Z between the first electrode and the second electrode adjacent to the first electrode, and a length H satisfy following relation expression 1.

0.5Z≦

H<

X+Y+2Z, where 100 nmX≦

10 μ

m, 100 nm≦

10 μ

m, and 100 nmZ≦

10 μ

m. 

 

[Relation Expression 1]

6. The LED lamp of claim 1, wherein the lamp comprises a plurality of nano-scale LED electrode assembles, and the plurality of nano-scale LED electrode assemblies are arranged in a line or surface shape, and

each of the plurality of nano-scale LED electrode assembles comprises at least two nano-scale LED devices of a green LED, a yellow LED, and a red LED, for each colors.

7. The LED lamp of claim 2, wherein, when the nano-scale LED device is a nano-scale UV LED, the phosphor comprises at least one of blue, yellow, green, amber, and red phosphors, and

when the nano-scale LED device is a nano-scale blue LED, the phosphor comprises at least one of yellow, green, amber, and red phosphors.

8. The LED lamp of claim 1, wherein the nano-scale LED electrode assembly further comprises an insulation barrier surrounding an electrode region to which the nano-scale LED device is connected,

the insulation barrier is disposed on the base substrate, and

a vertical distance between the base substrate and the insulation barrier is about 0.1 μ

m to about 100 μ

m.

9. The LED lamp of claim 5, wherein the width X of the first electrode, the width Y of the second electrode, the distance Z between the first electrode and the second electrode adjacent to the first electrode, and a length H of the nano-scale LED device satisfy following relation expression 2.

Z≦

H≦

X+Y+Z, where 100 nmX≦

10 μ

m, 100 nmY≦

10 μ

m, and 100 nmZ≦

10 μ

m. 

 

[Relation Expression 2]

10. An LED map using a nano-scale LED electrode assembly, the LED lamp comprising:

a support body; and

the nano-scale LED electrode assembly comprising a first electrode disposed on the support body, a second electrode spaced apart from the first electrode on the same plane as the first electrode, and a plurality of nano-scale LED devices connected to both of the first and second electrodes,

wherein each of the nano-scale LED devices comprises an insulation film, which covers the whole outer surface of a portion of at least the active layer to prevent an electrical short-circuit occurring due to contact between the active layer of the nano-scale LED device and the electrode line from occurring, an outer surface thereof.

11. The LED lamp of claim 10, wherein the support body has a plan shape, and

a phosphor that is excited by light irradiated form the nano-scale LED device is applied on at least one surface of the support body.

12. The LED lamp of claim 10, wherein the nano-scale LED electrode assembly further comprises an insulation barrier surrounding an electrode region to which the nano-scale LED device is connected,

the insulation barrier is disposed on the support body, and

a vertical distance between the support body and the insulation barrier is about 0.1 μ

m to about 100 μ

m.

13. The LED lamp of claim 10, wherein the nano-scale LED device has a length of about 100 nm to about 10 μ

m and an aspect ratio of about 1.2 to about 100.

14. The LED lamp of claim 10, wherein a width X of the first electrode, a width Y of the second electrode, a distance Z between the first electrode and the second electrode adjacent to the first electrode, and a length H satisfy following relation expression 1.

0.5Z≦

H<

X+Y+2Z, where 100 nmX≦

10 μ

m, 100 nmY≦

10 μ

m, and 100 nmZ≦

10 μ

m. 

 

[Relation Expression 1]

15. The LED lamp of claim 14, wherein the width X of the first electrode, the width Y of the second electrode, the distance Z between the first electrode and the second electrode adjacent to the first electrode, and a length H of the nano-scale LED device satisfy following relation expression 2.

Z≦

H≦

X+Y+Z, where 100 nmX≦

10 μ

m, 100 nmY≦

10 μ

m, and 100 nmZ≦

10 μ

m. 

 

[Relation Expression 2]