[특허]Cylindrical irradiance-mapping lens and its applications to LED shelf-lighting

[미국특허] Cylindrical irradiance-mapping lens and its applications to LED shelf-lighting 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F21V-005/00
출원번호	US-0332738 (2006-01-17)
등록번호	US-7273299 (2007-09-25)
발명자 / 주소	Parkyn,William A. Pelka,David G.
출원인 / 주소	Pelka & Associates
인용정보	피인용 횟수 : 61 인용 특허 : 5

초록 ▼

A cylindrical irradiance-redistribution lens is positioned over a line of LEDs, and is shaped to redistribute their light for uniformly illuminating a nearby planar target, such as shelves, signs, or walls. The lens shape is calculated via matching the cumulative lateral flux functions of the line of LEDs with that of the uniformly illuminated planar target. Numerous preferred embodiments are disclosed for a variety of illumination geometries.

대표청구항 ▼

We claim: 1. A cylindrical irradiance-redistribution lens is positioned over a line of LEDs, and in combination therewith, the lens configured to redistribute multiple LED light for uniformly illuminating a nearby substantially planar target, and wherein the lens is elongated and has cross sections along lens length characterized by: i) a central upper convex surface dome, ii) a central lower concave surface dome, under the upper surface dome, iii) said domes angled downwardly and transversely to terminate at two flanges projecting oppositely, iv) the lower surface of each flange intersecting the lower surface dome at a locus beneath the upper surface dome, said locus defining the periphery of the lower surface dome, the lower surface dome everywhere facing away from the upper surface dome. 2. The combination of claim 1 wherein the LEDs in said lens having cumulative lateral flux function or functions, and the lens shape being calculated for matching said cumulative lateral flux function or functions of the line of LEDs with that of the uniformity illuminated planar target, the lens being elongated to bridge multiple LEDs. 3. The combination of claim 1 including a tape supporting the line of LEDs extending parallel to said planar target in the form of a shelf, sign, or wall. 4. The combination of claim 3 including circuitry on or along the tape for electrically energizing the LEDs. 5. The combination of claim 1 wherein the lens has an aperture that is between about 6 to 7 times the emitter diameter for each LED. 6. The combination of claim 1 wherein light rays from each LED intercept substantially all surface extents of the domes. 7. The combination of claim 1 including a tape supporting the LEDs and spaced below said dome surfaces. 8. The combination of claim 7 including an elongated support, supporting the flanges and supporting the tape whereby light rays from each LED intercept substantially all surface extents of the domes. 9. The combination of claim 1 including an illuminated wall or walls intercepting LED light that has been redistributed by the lens, the wall extending lengthwise in a direction generally parallel to said line of LEDs. 10. The combination of claim 9 wherein the wall or walls form an illuminated corner. 11. The combination of claim 1 wherein the LEDs are positioned below the domes at loci characterized in that light flux from the LEDs forms a ray-fan subtending about 60째 said ray-fan directly extending uninterruptedly to said lower surface dome. 12. The combination of claim 11 wherein the ray-fan is refracted by the lens to exit from the upper dome to subtend about 45째. 13. The combination of claim 1 including a support for the LEDs which are positioned below the lens lower surface such that the ray-fan exiting the lens subtends the surface of the planar target, with substantially uniform illumination thereof. 14. The combination of claim 1 wherein the lens is asymmetric. 15. In combination, a cylindrical lens structure in combination with a series of LEDs and a flat target surface proximate the lens to receive illumination from the LEDs, and the lens configured to produce substantially uniform illumination on and over the area of said flat surface proximate said lens, the lens having i) a central upper convex surface dome, ii) a central lower concave surface dome, under the upper surface dome, iii) said domes angled downwardly and transversely to terminate at two flanges projecting oppositely, iv) the lower surface of each flange intersecting the lower surface dome at a locus beneath the upper surface dome, said locus defining the periphery of the lower surface dome, the lower surface dome everywhere facing away from the upper surface dome. 16. The combination of claim 15 wherein the lens extends linearly, and the LEDs are spaced apart linearly. 17. The combination of claim 15 including a tape supporting the LEDs and via which electrical energy is supplied to the LEDs. 18. The combination of claim 15 wherein the lens defines dome shaped regions projecting away from the series of LEDs.

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연합인증

[미국특허] Cylindrical irradiance-mapping lens and its applications to LED shelf-lighting 원문보기

초록 ▼

대표청구항 ▼

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이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

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[미국특허] Cylindrical irradiance-mapping lens and its applications to LED shelf-lighting 원문보기

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대표청구항 ▼

연구과제 타임라인

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