[특허]Light guide and lateral illuminator

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F21V-008/00
출원번호	US-0263539 (2002-10-03)
발명자 / 주소	Popovic, Dragoslav Venhaus, David Allen
출원인 / 주소	J. W. Speaker Corporation
대리인 / 주소	Quarles & Brady LLP
인용정보	피인용 횟수 : 43 인용 특허 : 16

초록 ▼

A lighting apparatus for providing a substantially uniformly illuminated light emitting surface, the apparatus comprising first and second light sources generating flux patterns including light rays that diverge about first and second central light rays, respectively and a light guide member having

A lighting apparatus for providing a substantially uniformly illuminated light emitting surface, the apparatus comprising first and second light sources generating flux patterns including light rays that diverge about first and second central light rays, respectively and a light guide member having substantially straight first and second en sections and a curved section, the first end section having a proximal end and a distal end and formed about a first light axis, the second end section having a proximal end and a distal end and formed about a second light axis, the curved section including first and second ends that are linked to the distal ends of the first and second end sections, respectively, the guide forming a front surface and an oppositely facing textured back surface along each of the end sections and the curved section, the curved section forming a bend such that the back surface is concave and the front surface is convex along the curved section length, at least a portion of the back surface tapered toward the first light axis in the direction from the proximal end to the distal end of the first end section, wherein, the first light source is juxtaposed such that the central light ray is directed along the first light axis and the second light source is juxtaposed such that the central light ray is directed along the second light axis.

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1. A lighting apparatus for providing a substantially uniformly illuminated light emitting surface, the apparatus comprising:first and second light sources generating flux patterns including light rays that diverge about first and second central light rays, respectively; anda light guide member havi

1. A lighting apparatus for providing a substantially uniformly illuminated light emitting surface, the apparatus comprising:first and second light sources generating flux patterns including light rays that diverge about first and second central light rays, respectively; anda light guide member having substantially straight first and second end sections and a curved section, the first end section having a proximal end and a distal end and formed about a first light axis, the second end section having a proximal end and a distal end and formed about a second light axis, the curved section including first and second ends that are linked to the distal ends of the first and second end sections, respectively, the guide forming a front surface and an oppositely facing textured back surface along each of the end sections and the curved section, the curved section forming a bend such that the back surface is concave and the front surface is convex along the curved section length, at least a portion of the back surface tapered toward the first light axis in the direction from the proximal end to the distal end of the first end section;wherein, the first light source is juxtaposed such that the central light ray is directed along the first light axis and the second light source is juxtaposed such that the central light ray is directed along the second light axis. 2. The apparatus of claim 1 wherein the degree of taper along the first end section increases from the proximal end to the distal end. 3. The apparatus of claim 2 wherein at least a portion of the back surface tapers toward the second light axis in the direction from the proximal end to the distal end of the second end section and the degree of taper along the second end section increases from the proximal end to the distal end. 4. The apparatus of claim 3 wherein the rate of taper increase is constant along the lengths of each of the first and second end sections. 5. The apparatus of claim 4 wherein the first end section includes X equi-length segments and the degree of taper changes N degrees along each of the X segments. 6. The apparatus of claim 5 wherein N is between 1 and 5 degrees. 7. The apparatus of claim 6 wherein the first end section forms a proximal end width dimension between the front and back surfaces and the length of each equi-length segment is between three and seven times the proximal end width dimension. 8. The apparatus of claim 7 wherein the length of each equi-length segment is approximately five times the proximal end width dimension. 9. The apparatus of claim 3 wherein a width dimension between the back and front surfaces is uniform along the length of the curved section. 10. The apparatus of claim 1 wherein texture is provided along at least a portion of the front surface. 11. The apparatus of claim 1 wherein the guide top and bottom surfaces and wherein at least a portion of each of the top and bottom surfaces is textured. 12. The apparatus of claim 1 further including a coating layer on the back surface and wherein the texture is provided on the back surface by a molecular bond between the coating layer and the back surface. 13. The apparatus of claim 12 wherein the coating layer includes a plastic member. 14. The apparatus of claim 12 wherein the coating layer has a white color. 15. The apparatus of claim 1 wherein the first and second light axis form an angle between 60 degrees and 130 degrees. 16. The apparatus of claim 15 wherein the first and second light axis form an angle of approximately 90 degrees. 17. A lighting apparatus for providing a substantially uniformly illuminated light emitting surface, the apparatus comprising:a light source generating a flux pattern including light rays that diverge about a central light ray; anda light guide member having a substantially straight end section and a curved section, the end section having a proximal end and a distal end and formed about a light axis, the curved section including first and second ends and linked at the first end to the distal end of the end section, the guide forming a front surface and an oppositely facing and textured back surface along the end section and the curved section, the curved section forming a bend such that the back surface is concave and the front surface is convex along the curved section length, at least a portion of the back surface tapered toward the light axis in the direction from the proximal end to the distal end;wherein, the light source is juxtaposed such that the central light ray is directed along the light axis. 18. The apparatus of claim 16 wherein the degree of taper increases from the proximal end to the distal end. 19. The apparatus of claim 18 wherein the rate of taper increase is constant along the length of the end section. 20. The apparatus of claim 19 wherein the end section includes X equi-length segments and the degree of taper changes N degrees along each of the X segments. 21. The apparatus of claim 20 wherein N is between 1 and 5 degrees. 22. The apparatus of claim 21 wherein the end section forms a proximal end width dimension between the front and back surfaces and the length of each equi-length segment is approximately five times the proximal end width dimension. 23. The apparatus of claim 17 wherein texture is provided along at least a portion of the front surface. 24. The apparatus of claim 17 further including a coating layer on the back surface and wherein the texture is provided on the back surface by a molecular bond between the coating layer and the back surface. 25. The apparatus of claim 24 wherein the coating layer includes a plastic white member. 26. The apparatus of claim 17 wherein the end section is a first end section and the light source is a first source, the apparatus further including a second end section and a second light source, the second end section including proximal and distal ends and formed about a second light axis, the second light source generating a flux pattern including light rays that diverge about a central light ray, the second end section linked to the second end of the curved section and the second light source is juxtaposed such that the central light ray of the second source is directed along the second light axis. 27. The apparatus of claim 26 wherein the first and second light axis form an angle of approximately 90 degrees. 28. The apparatus of claim 27 wherein at least a portion of the back surface tapers toward the second light axis in the direction from the proximal end to the distal end of the second end section and the degree of back surface taper is greater at the distal end than at the proximal end of the first end section and the degree of taper is greater at the distal end than at the proximal end of the second end section. 29. The apparatus of claim 17 wherein the front surface is substantially parallel to the light axis along the end section. 30. The apparatus of claim 17 wherein at least a portion of the front surface forms an angle with respect to the light axis.

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