LED-based assembly with fixating optical boards

1. An LED-based assembly comprising:

an electrical device comprising:

a plurality of circuit boards arranged to drive and/or supply an array of LEDs;

a plurality of arrays of LEDs electrically connected, respectively, onto the circuit boards;

an optical device provided onto the electrical device and comprising a plurality of optical boards, each one of said optical boards being mounted onto at least two of said circuit boards such that some LEDs of an array of LEDs connected to said at least two circuit boards are not covered by the optical board.

2. The assembly according to claim 1 , wherein at least one among the optical boards is mounted onto at least two of said circuit boards such that some LEDs of each array of LEDs connected to the at least two circuit boards are not covered by this optical board.

3. The assembly according to claim 1 , wherein each one of said circuit boards and said optical boards exhibits width, length and thickness, and wherein the width of each one of the optical boards is approximately the same as half the sum of the widths of the at least two circuit boards onto which it is mounted.

4. The assembly according to claim 1 , wherein the circuit boards have substantially the same dimensions.

5. The assembly according to claim 1 , wherein the optical boards have substantially the same dimensions.

6. The assembly according to claim 1 , wherein the at least one of said optical boards is at least partly mounted onto circuit boards at zones of fixation located apart from the LEDs connected to these circuit boards.

7. The assembly according to claim 6 , wherein the fixations at the zones of fixation are performed via one or a combination of the following means of fixation:

holes provided through the optical board and through the circuit board, and a rigid element of fixation provided through these holes;

soldering.

8. The assembly according to claim 1 , wherein said circuit boards are positioned side by side to form a main electrical board, and wherein said optical boards are positioned side by side to form a main optical board.

9. The assembly according to claim 1 , further comprising narrow optical boards covering at least a part of the LEDs not covered by the optical boards.

10. The assembly according to claim 1 , further comprising a frame around the electrical device and the optical device.

11. The assembly according to claim 10 , wherein some inner opposite surfaces of the frame are provided with notches in which the electrical device and/or optical device can slide.

12. The assembly according to claim 10 , wherein the frame comprising electrical connections between at least a part of said M circuit boards.

13. The assembly according to claim 12 , wherein the frame comprising a single electrical interface used for supplying and/or controlling the M circuit boards.

14. The assembly according to claim 1 , further comprising a single control unit comprising:

a control unit able to control signals to the LEDs of the circuit boards;

several parallel signals output, all connected to the control unit such that they output the same signal produced by the control unit;

converters, each converting output signals to power, each converter being connected on one hand to one output of the control unit and on the other hand to an electrical input of one or several circuit boards.

15. An LED-based assembly comprising:

an electrical device comprising:

a plurality of circuit boards arranged to drive and/or supply an array of LEDs;

a plurality of arrays of LEDs electrically connected, respectively, onto the circuit boards; and

an optical device provided onto the electrical device and comprising a plurality of optical boards, each one of said optical boards being mounted onto at least two of said circuit boards such that some LEDs of an array of LEDs connected to said at least two circuit boards are not covered by the optical board;

wherein each of the optical boards are mounted onto at least two adjacent circuit boards, each of the at least two adjacent circuit boards having zones of fixation working in conjunction with the optical boards and a plurality of rigid elements of fixation to attach the at least two adjacent circuit boards together.