Lighting device

• US 20070001709A1
• Filed: 03/15/2006
• Published: 01/04/2007
• Est. Priority Date: 07/01/2005
• Status: Active Grant

• Current Assignee: Suzhou Industrial Park Tony Lighting Technology Co., Ltd.
• Original Assignee: Yu-Nung Shen
• Inventors: Shen, Yu-Nung
• Granted Patent: US 7,408,370 B2
• Time in Patent Office: Days
• US Class Current: 362/84
• CPC Class Codes: H01L 2224/16145 the bodies being stacked
• CPC Class Codes: H01L 2224/16227 the bump connector connecting to a bond pad of the item
• CPC Class Codes: H01L 2224/2518 being disposed on at least two different sides of the body, e.g. dual array
• CPC Class Codes: H01L 2224/81801 Soldering or alloying
• CPC Class Codes: H01L 2225/06513 Bump or bump-like direct electrical connections between devices, e.g. flip-chip connection, solder bumps
• CPC Class Codes: H01L 2225/06517 Bump or bump-like direct electrical connections from device to substrate
• CPC Class Codes: H01L 2225/06527 Special adaptation of electrical connections, e.g. rewiring, engineering changes, pressure contacts, layout
• CPC Class Codes: H01L 2225/06551 Conductive connections on the side of the device
• CPC Class Codes: H01L 2225/06586 Housing with external bump or bump-like connectors
• CPC Class Codes: H01L 23/3121 a substrate forming part of the encapsulation
• CPC Class Codes: H01L 23/5227 Inductive arrangements or effects of, or between, wiring layers other inductive arrangements H01L23/645
• CPC Class Codes: H01L 24/73 Means for bonding being of different types provided for in two or more of groups H01L24/10, H01L24/18, H01L24/26, H01L24/34, H01L24/42, H01L24/50, H01L24/63, H01L24/71
• CPC Class Codes: H01L 24/81 using a bump connector
• CPC Class Codes: H01L 25/0652 the devices being arranged next and on each other, i.e. mixed assemblies
• CPC Class Codes: H01L 25/0657 Stacked arrangements of devices
• 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 2924/01006 Carbon [C]
• CPC Class Codes: H01L 2924/01033 Arsenic [As]
• CPC Class Codes: H01L 2924/01047 Silver [Ag]
• CPC Class Codes: H01L 2924/01054 Xenon [Xe]
• CPC Class Codes: H01L 2924/01078 : Platinum [Pt]
• CPC Class Codes: H01L 2924/12041 : LED
• CPC Class Codes: H01L 2924/15153 : the die mounting substrate comprising a recess for hosting the device
• CPC Class Codes: H01L 2924/15311 : being a ball array, e.g. BGA
• CPC Class Codes: H01L 2924/16152 : Cap comprising a cavity for hosting the device, e.g. U-shaped cap

Abstract

A lighting device includes a light-guiding rod and a light-emitting unit. The light-guiding rod includes a transparent hollow housing, the housing has two open ends and two insulating plugs for closing corresponding said two open ends. The light-emitting unit includes a transparent light-guiding plate, at least one light-emitting diode, a mounting substrate, and a plurality of conductive bumps. The transparent light-guiding plate is disposed in said housing. At least one light-emitting diode has a light-emitting surface; the surface is attached to a lower surface of said light-guiding plate. The mounting substrate has a wiring surface and a plurality of electric traces. A plurality of conductive bumps for connecting electrically said electric contacts of said at least one light-emitting diode to corresponding said electric traces in such a manner that said at least one light-emitting diode is mounted on said wiring surface of said mounting substrate.

Claims

1. A lighting device, comprising:

a light-guiding rod including a transparent hollow housing having two open ends and two insulating plugs for closing corresponding said two open ends, each of said plugs having an inner surface and a supporting slot form on said inner surface; and

a light-emitting unit, including

a transparent light-guiding plate disposed in said housing and having two end portions each extending into said supporting slot of a corresponding one of said plugs,

at least one light-emitting diode, said at least one light-emitting diode having a light-emitting surface attached to a lower surface of said light-guiding plate, a non-light-emitting surface opposed to said light-emitting surface, and a plurality of electric contacts provided on said non-light-emitting surface,

a mounting substrate having a wiring surface and a plurality of electric traces formed on said wiring surface, and

a plurality of conductive bumps for connecting electrically said electric contacts of said at least one light-emitting diode to corresponding said electric traces in such a manner that said at least one light-emitting diode is mounted on said wiring surface of said mounting substrate.

2. A lighting device as claimed in claim 1, wherein said housing has an inner surface and a fluorescent layer formed on said inner surface.

3. A lighting device as claimed in claim 1, wherein each of said plugs has a body portion outside said housing, a horizontally-extending portion extending from an inner surface of said body portion into said housing, and a pair of through-holes penetrating said body portion and said horizontally-extending portion, said light-emitting unit further including two pairs of power supply electrodes, each power supply electrode of each pair of power supply electrodes extending through a corresponding one of said though-holes in such a manner that one end portion of said electrode extends inside said housing and other end portion of said electrode extends outside said housing, said electric traces on said wiring surface of said mounting substrate connected electrically to said end portions of corresponding said electrodes inside said housing via conductors.

4. A lighting device as claimed in claim 3, wherein said horizontally-extending portion of each of said plugs is formed with said supporting slot, said light-guiding plate having a round top surface, each of said end portions of said light-guiding plate having an outwardly-extending tab extending into said supporting slot of a corresponding one of said plugs in order to fix said light-guiding plate in said housing.

5. A lighting device, comprising:

a light-guiding rod including a transparent hollow housing having two open ends and two insulating plugs for closing corresponding said two open ends, each of said plugs having an inner surface and a supporting slot form on said inner surface; and

a light-emitting unit, including

a transparent light-guiding plate disposed in said housing and having two end portions each extending into said supporting slot of a corresponding one of said plugs, said light-guiding plate having a lower surface and a plurality of electric traces formed on said lower surface,

at least one light-emitting diode, said at least one light-emitting diode having a light-emitting surface and a plurality of electric contacts provided on said light-emitting surface, and

a plurality of conductive bumps for connecting electrically said electric contacts of said at least one light-emitting diode to corresponding said electric traces on said lower surface of said light-guiding plate in such a manner that said at least one light-emitting diode is mounted on said lower surface of said light-guiding plate.

6. A lighting device as claimed in claim 5, wherein said housing has an inner surface and a fluorescent layer formed on said inner surface.

7. A lighting device as claimed in claim 5, wherein each of said plugs has a body portion outside said housing, a horizontally-extending portion extending from an inner surface of said body portion into said housing, and a pair of through-holes penetrating said body portion and said horizontally-extending portion, said light-emitting unit further including two pairs of power supply electrodes, each power supply electrode of each pair of power supply electrodes extending through a corresponding one of said though-holes in such a manner that one end portion of said electrode extends inside said housing and other end portion of said electrode extends outside said housing, said traces on said wiring surface of said mounting substrate connected electrically to said end portions of corresponding said electrodes inside said housing via conductors.

8. A lighting device as claimed in claim 7, wherein said horizontally-extending portion of each of said plugs is formed with said supporting slot, said light-guiding plate having a round top surface, each of said end portions of said light-guiding plate having an outwardly-extending tab extending into said supporting slot of a corresponding one of said plugs in order to fix said light-guiding plate in said housing.

9. A lighting device, comprising:

a light-guiding rod including a transparent hollow housing having two open ends and two insulating plugs for closing corresponding said two open ends; and

a light-emitting unit, including

at least one mounting substrate having a wiring surface, a plurality of electric traces formed on said wiring surface, and a back surface which is opposed to said wiring surface and which is attached to an inner surface of a corresponding one of said plugs,

at least one light-emitting diode, said at least one light-emitting diode having a light-emitting surface, a non-light-emitting surface opposed to said light-emitting surface, and a plurality of electric contacts provided on said light-emitting surface, and

a plurality of conductive bumps for connecting electrically said electric contacts of said at least one light-emitting diode to corresponding said electric traces on said wiring surface of said mounting substrate in such a manner that said at least one light-emitting diode is mounted on said wiring surface of said mounting substrate.

10. A lighting device as claimed in claim 9, wherein each of said plugs has a body portion outside said housing, a horizontally-extending portion extending from an inner surface of said body portion into said housing, and a pair of through-holes penetrating said body portion and said horizontally-extending portion, said light-emitting unit further including two pairs of power supply electrodes, each power supply electrode of each pair of power supply electrodes extending through a corresponding one of said though-holes in such a manner that one end portion of said electrode extends inside said housing and other end portion of said electrode extends outside said housing, said traces on said wiring surface of said mounting substrate connected electrically to said end portions of corresponding said electrodes inside said housing via conductors.

11. A lighting device as claimed in claim 10, wherein said inner surface of said horizontally-extending portion of each of said plugs is formed with an annular groove, said light-emitting unit further including a transparent light-guiding bar, said light-guiding bar having two end portions and two annular flanges extending outwardly from corresponding said end portions into said annular grooves of corresponding said plugs in such a manner that said light-guiding bar is fixed in said housing and that each of said light-emitting diodes is surrounded by a corresponding one of said annular flanges.

12. A lighting device as claimed in claim 11, wherein said light-guiding bar has a plurality of air bubbles formed therein for reflecting light emitted from said at least one light-emitting diode out of said housing.

13. A lighting device as claimed in claim 9, wherein said housing is filled with inert gas.

14. A lighting device as claimed in claim 9, wherein said housing is filled with liquid dye or fluorochrome.

15. A lighting device as claimed in claim 9, wherein said housing is filled with optical fibers, each of said fibers having one end provided with fluorescent material.

16. A lighting device as claimed in claim 9, wherein said light-emitting unit further includes at least one light-reflecting cup, said at least one light-reflecting cup is provided on said at least one mounting substrate in such a manner that said at least one light-emitting diode is located in a central portion of said at least one light-reflecting cup.

17. A lighting device, comprising:

a light-guiding rod including a transparent housing, said housing having an inner surface and a reflecting layer formed on said inner surface; and

a light-emitting unit operable to emit light into said light-guiding rod through two end of said light-guiding rod,

wherein said reflecting layer has a width widen than that of the end portions of the same.