IPC分类号：
F21V8/00 | F21V9/32 | F21V29/502 | F21Y103/10 | F21Y115/10
国民经济行业分类号：
C4350 | C3874 | C4090 | C3879
当前申请(专利权)人：
SIGNIFY HOLDING B.V.
原始申请(专利权)人：
SIGNIFY HOLDING B.V.
当前申请(专利权)人地址：
High Tech Campus 48,5656 AE Eindhoven NL
发明人：
DE BOER, DIRK, KORNELIS, GERHARDUS | BRULS, DOMINIQUE, MARIA | HANNEN, GERARDUS, EVERARDUS, MARIE
代理人：
MALLENS, ERIK, PETRUS, JOHANNES ET AL.
摘要：
The invention provides a lighting system (1) comprising: - a light source (10) configured to provide light source light (11); - an elongated luminescent body (100) having a length (L), the elongated luminescent body (100) comprising: - a plurality of side faces (140) over at least part of the length (L), wherein the side faces (140) comprise a first side face (143), comprising a radiation input face (111), and a second side face (144) configured parallel to the first side face (143), wherein the side faces (143, 144) define a height (H), wherein the elongated luminescent body (100) further comprises a radiation exit window (112) bridging at least part of the height (H) between the first side face (143) and the second side face (144); - a garnet type A3B5O12 luminescent material (120) comprising trivalent cerium, with a height dependent concentration selected from a concentration range defined by a minimum concentration ymin = 0.036*x-1 and a maximum concentration ymax = 0.17*x-1, wherein y is the trivalent cerium concentration in % relative to the A element, and wherein h is the height (H) in mm, wherein the garnet type A3B5O12 luminescent material (120) is configured to convert at least part of the light source light (11) into converter light (101); - one or more heat transfer elements (200) in thermal contact with one or more side faces (140); and - a reflector (2100) configured at the second side face (144) and configured to reflect light source light (11) escaping from the elongated luminescent body (100) via second face (144) back into the elongated luminescent body (100).
技术问题语段：
The technical problem addressed in this patent is the need for high brightness light sources for various applications such as spots, stage-lighting, headlamps, and digital light projection. The invention describes a lighting system that uses a light concentrator to convert shorter wavelength light to longer wavelengths in a highly transparent luminescent material, which can then be extracted from one of the surfaces of the material to create an intense beam of light. The light concentrator comprises a rectangular bar of a phosphor doped, high refractive index garnet, which can be pumped with blue light to generate green light. The main part of the converted light is trapped into the high refractive index bar and wave guided to the nose of the bar where it can leave. The patent text also describes the use of light conversion in high lens density lighting systems and the design of a dual layered composite structure ceramics phosphor for white LED devices.
技术功效语段：
The patent text describes a lighting system that uses a light concentrator to convert short wavelength light to longer wavelengths in a transparent luminescent material. This allows for the production of high brightness light sources suitable for various applications such as stage-lighting and digital light projection. The light concentrator comprises a rectangular bar of the luminescent material with multiple surfaces that guide the converted light to the desired output beam. The technical effect of this system is to provide a highly efficient and reliable lighting system that can produce high brightness light with high reliability and efficiency.
权利要求：
CLAIMS:
1. A lighting system (1) comprising:
a light source (10) configured to provide light source light (11); an elongated luminescent body (100) having a length (L), and a height (H) or diameter (D), the elongated luminescent body (100) having light guiding properties, and the elongated luminescent body (100) comprising:
- one or more side faces (140) over at least part of the length (L), comprising a radiation input face (111), wherein the elongated luminescent body (100) further comprises a radiation exit window (112) bridging at least part of the height (H) or diameter (D);
- a garnet type A3B5O12 luminescent material (120) comprising trivalent cerium, with a height dependent concentration selected from a concentration range defined by a minimum concentration ymin = 0.036*x_1and a maximum concentration ymax = 0.l7*x_1, wherein y is the trivalent cerium concentration in mole % relative to the A element, and wherein x is the height (H) or diameter (D) in mm, wherein the garnet type A3B5O12 luminescent material (120) is configured to convert at least part of the light source light (11) into converter light (101);
one or more heat transfer elements (200) in thermal contact with one or more side faces (140); and
a reflector (2100) configured to reflect light source light (11) escaping from the elongated luminescent body (100) back into the elongated luminescent body (100), wherein the elongated luminescent body (100) is configured between the light source (10) and the reflector (2100).
2. The lighting system (1000) according to claim 1, wherein the minimum concentration ymin = 0.04*x_1.
3. The lighting system (1000) according to any one of the preceding claims, wherein A comprises one or more of yttrium, gadolinium and lutetium, and wherein B comprises one or more of aluminum and gallium.
4. The lighting system (1000) according to any one of the preceding claims, wherein A=Lu and wherein B=Al, or wherein A comprises Y and Lu, and wherein B=Al.
5. The lighting system (1000) according to any one of the preceding claims, elongated luminescent body (100) comprises a ceramic body or single crystal, and wherein the mean free path for the wavelength of interest is at least 0.5 times the length (L) of the elongated luminescent body (100), wherein the wavelength of interest is the wavelength at maximum emission of the converter light (101) of the luminescent material.
6. The lighting system (1000) according to any one of the preceding claims, wherein the one or more heat transfer elements (200) are configured parallel to at least part of one or more of the side faces (140) over at least part of the length (L) of the elongated luminescent body (100) at a shortest distance (dl) from the respective one or more side faces (140) with 1 pm < dl < 100 pm.
7. The lighting system (1000) according to claim 6, wherein 2 pm < dl < 50 pm, and wherein the one or more heat transfer elements (200) comprise or are functionally coupled to a heat sink.
8. The lighting system (1000) according to any one of the preceding claims, wherein the one or more heat transfer elements (200) comprise one or more heat transfer element faces (201) directed to one or more side faces (140), wherein at least part of the one or more heat transfer element faces (201) of the respective one or more heat transfer elements (200) is in physical contact with the elongated luminescent body (100), and wherein the shortest distance (dl) according to any one of the preceding claims 6-7 is an average distance.
9. The lighting system (1000) according to any one of the preceding claims, comprising a plurality of side faces (140) over at least part of the length (L), wherein the side faces (140) comprise a first side face (143), comprising the radiation input face (111), and a second side face (144) configured parallel to the first side face (143), wherein the side faces (143, 144) define the height (H), wherein the elongated luminescent body (100) further comprises the radiation exit window (112) bridging at least part of the height (H) between the first side face (143) and the second side face (144), wherein the reflector (2100) is configured
at the second side face (144) and is configured to reflect light source light (11) escaping from the elongated luminescent body (100) via second face (144) back into the elongated luminescent body (100).
10. The lighting system (1000) according to claim 9, wherein the one or more heat transfer elements (200) are at least in thermal contact with all side faces (140) other than the first side face (143), and wherein the one or more heat transfer elements (200) are configured as a monolithic heat transfer element (220), which is configured in thermal contact with a support (240) for the light source (10), wherein a heat transfer element face (201) of the one or more heat transfer element (200) directed to the second face (144) comprises the reflector (2100).
11. The lighting system (1000) according to any one of the preceding claims, wherein the reflector (2100) comprises a specular mirror or a diffuse reflector.
12. The lighting system (1000) according to any one of the preceding claims, comprises a plurality of light sources (10), wherein the light sources (10) have optical axes (O) configured perpendicular to one or more of the one or more side faces (140).
13. The lighting system (1000) according to claim 12, wherein the plurality of light sources (10) is configured to provide the light source light (11) to only one of the one or more side faces (140).
14. The lighting system (1000) according to any one of the preceding claims, wherein the luminescent material (120) has an excitation maximum kxm, wherein the light sources (10) are configured to provide the source light (11) with an intensity maximum lrc, wherein lchi-5 nm< lrc< lchi+5 nm.
15. A projection system or a luminaire comprising the system (1000) according to any one of the preceding claims.