Highly efficient LED array module with pre-calculated non-circular asymmetrical light distribution
View Patent ↗A light module includes a light emitting diode (LED) array and a double-reflective assembly coupled to the LED array. The double-reflective assembly includes a lower member having a frame. The frame has an opening corresponding to the LED array. The frame and LED array are located in the same plane. The light module further includes a left bottom reflector and a right bottom reflector. The light module further includes an upper member which includes a left top reflector; and a right top reflector, wherein the left top reflector is attached to the left bottom reflector, and right top reflector is attached to the right bottom reflector, each forming an arbitrary left and right double-reflective assembly. A shape geometry and profile of each double-reflective assembly provides a pre-calculated combined non-circular asymmetrical intensity distribution pattern. The intensity distribution pattern is a superposition of light reflected from the bottom reflectors, light reflected from the top reflectors, light doubly reflected from both the top and bottom reflectors, and light directed into the intensity distribution pattern directly from the LED array.
1. A light module, comprising:
light emitting means for emitting light; and
reflecting means for reflecting a portion of the emitted light to provide a pre-determined non-circular asymmetrical light distribution in a plane of illumination, wherein the reflecting means comprises a double reflector, comprising a first member and a second member, wherein the first member comprises a frame with a single opening for the light emitting means, wherein the first member and the second member both reflect light emitted through the single opening.
2. The light module of claim 1 , further comprising:
means for removing heat from the light emitting means coupled to the first member; and
means in the first member for fixing the heat removing means to the first member.
3. The light module of claim 1 , wherein the light distribution in the plane of illumination comprises a superposition of:
an intensity distribution from light directed into a pattern directly from the light emitting means;
an intensity distribution from light reflected from the first member;
an intensity distribution from light reflected from the second member; and
an intensity distribution from light double-reflected from both first and second members.
4. The light module of claim 3 , wherein each of the first and second members comprises one or more additional openings.
5. The light module of claim 4 , wherein the light distribution in the plane of illumination comprises a further superposition comprising an intensity distribution from light emitted through the one or more additional openings in the second member.
6. The light module of claim 1 , wherein each of the first and second members is fabricated from sheet metal with a reflective surface coating.
7. The light module of claim 1 , wherein each of the first and second members is fabricated from a plastic material by injecting molding and having reflective surfaces.
8. The light module of claim 1 , wherein the each of the first and second members is fabricated from a combination of sheet metal and plastic molded components having reflective surfaces.
9. The light module of claim 8 , wherein the second member comprises two or more molded components.
10. The light module of claim 1 , wherein the light emitting means is located on the same plane as the first member.
11. The light module of claim 1 , wherein the first member comprises a left bottom reflector and a right bottom reflector.
12. The light module of claim 1 , wherein the second member comprises a left top reflector and a right top reflector.
13. The light module of claim 1 , wherein the first member is flat and the second member is rounded.
14. The light module of claim 1 , wherein the light emitting means is an LED array.