IPC分类号：
F21V7/18 | F21V7/22 | F21V7/10 | F21V5/02
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, AE Eindhoven, NL
发明人：
HIKMET, RIFAT, ATA, MUSTAFA | VAN BOMMEL, TIES | ANSEMS, JOHANNES, PETRUS, MARIA
代理机构：
VERWEIJ, PETRONELLA DANIËLLE
摘要：
Starting sheet material (1) adapted for forming a reflector (2) for a lighting device (40), the starting sheet material (1) comprising a flat reflective sheet material (14) shaped as a sector of an annulus bendable into a parabolic reflector or a truncated cone reflector, the flat reflective sheet material (1) comprising a first surface (3), a second surface (4), a first edge (5) shaped as a segment of a circle with a first radius and a second edge (6) shaped as a segment of a circle with a second radius, the second radius being smaller than the first radius, a third edge (7) and a fourth edge (8), the third edge (7) and the fourth edge (8) extending between said first edge (5) and said second edge (6), wherein optical structures (9) are provided on at least a part of one of the first surface (3) and the second surface (4), said optical structures (9) enabling collimation and beam shaping of incident light, said optical structures (9) being applied to the flat reflective sheet material (14) along a direction (11) perpendicular to the radial direction (12) of the flat reflective sheet material (1).
技术问题语段：
The technical problem addressed in this patent text is the need for a cost-effective and versatile method to produce custom specular reflecting surfaces for downlights. Current methods such as deep drawing of sheet metal or vacuum deposition of metal onto high gloss injection molded parts are limited in their customization options. Using a 3D printing process is not capable of producing specular reflecting surfaces, and using a flat material with a shape of a block arc and bend it into a truncated cone shaped reflector for beam shaping is not as effective as a parabolic reflector for producing collimation or desired light distributions. The prior art reflector comprising three material layers, namely a diffusing layer, a lenticular layer or more precisely a prism film and a light reflecting layer, is complex and provides limited design options.
技术功效语段：
The present invention aims to provide a starting sheet material that can be used to form a reflector for a light emitting device. The reflector needs to be flexible, collimate light output well, and not compromise the design. The invention also aims to produce the starting sheet material using a 3D printing process without compromising the optical properties of the structure. The technical effects of the invention are that it provides a versatile, cheap, and simple starting sheet material that can easily be bent into the shape of a reflector and produce high-quality light output.
权利要求：
1. Starting sheet material (1) adapted for forming a reflector (2, 20, 200) for a lighting device, the starting sheet material comprising: a flat reflective sheet material (14) shaped as a sector of an annulus bendable into a parabolic reflector or a truncated cone reflector, the flat reflective sheet material comprising a first surface (3), a second surface (4), a first edge (5) shaped as a segment of a circle with a first radius and a second edge (6) shaped as a segment of a circle with a second radius, the second radius being smaller than the first radius, a third edge (7) and a fourth edge (8), the third edge and the fourth edge extending between said first edge and said second edge, wherein optical structures (9) are provided on at least a part of at least one of the first surface and the second surface, said optical structures enabling collimation and/or beam shaping of incident light, said optical structures (9) being applied to the flat reflective sheet material (14) along a direction (11) perpendicular to the radial direction (12) of the flat reflective sheet material, characterised in that said optical structures (9) are optical structures enabling reflection of at least a portion of the incident light at the flat reflective sheet material after two refractions on the optical structures.
2. Starting sheet material according to claim 1, wherein said optical structures (9) are applied to the flat reflective sheet material such that a gradient in density of the optical structures in the radial direction of the flat reflective sheet material is provided.
3. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are provided on a part of the one of the first surface and the second surface of the flat reflective sheet material being closest to said second edge.
4. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are provided directly on at least a part of the one of the first surface and the second surface.
5. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are provided on the first surface and the second surface, or on all of the at least one of the first surface and the second surface, or on all of the first surface and the second surface.
6. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are based on flexible polymer material.
7. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are applied to the flat reflective sheet material by means of printing or fused deposition modelling.
8. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are any one of: refractive optical structures, diffractive optical structures, photonic crystals, continuous optical structures, segmented optical structures, and combinations thereof.
9. Starting sheet material according to any one of the above claims, wherein said optical structures (9) are provided on the flat reflective sheet material in such a way that the density of the optical structures is any one of: more than 40 %, more than 60 %, and more than 70 %.
10. Starting sheet material according to any one of the above claims, wherein any one or more of the optical structures (9), the flat reflective sheet material (14) and the whole starting sheet material (1) is obtained by 3D printing.
11. A reflector (2) for a lighting device, the reflector (2) comprising a starting sheet material (1) according to any one of the above claims, wherein said starting sheet material is bent in such a way that the one of the first surface (3) and the second surface (4) of the flat reflective sheet material (14) comprising said optical structures (9) form a surface facing towards a center axis (13) of the reflector, and the third edge (7) and the fourth edge (8) of the flat reflective sheet material are brought into contact with one another.
12. A reflector according to claim 11, wherein the third edge (7) and the fourth edge (8) of the flat reflective sheet material are connected with one another.
13. A reflector according to claim 11 or 12, wherein the reflector (2) is a truncated cone shaped reflector or a parabolic reflector, and/or wherein the reflector is a specular reflector.
14. A lamp, a luminaire, a lighting fixture, a tunable lamp, a tunable luminaire, a tunable lighting fixture, a directional lamp, a directional luminaire or a directional lighting fixture comprising a reflector according to any one of the above claims 11-13 or a starting sheet material according to any one of the above claims 1-10.