Light module providing positioning and fixation of a circuit board in a housing
There is provided a light module having a housing, a first circuit board arranged in the housing and comprising a central through hole, a front side on which driver electronics through-hole components are mounted, and a back side from which leads of the driver electronics through-hole components protrude, wherein a gap behind the first circuit board accommodates the leads, and a second circuit board electrically connected to the first circuit board and comprising at least one solid-state lighting element adapted to emit light, wherein the second circuit board is arranged in level with the first circuit board or in a plane behind the first circuit board.
1. A light module, comprising:
a housing;
a first circuit board arranged in the housing and comprising a central through hole, a front side on which driver electronics through-hole components are mounted, and a back side from which leads of the driver electronics through-hole components protrude, wherein a gap behind the first circuit board accommodates said leads;
a second circuit board electrically connected to the first circuit board and comprising at least one solid-state lighting element adapted to emit light, wherein the second circuit board is arranged in level with the first circuit board or in a plane behind the first circuit board; and,
a heat spreader arranged behind the first and second circuit boards,
an electrical insulator arranged between the first circuit board and the heat spreader,
wherein the electrical insulator comprises a central through hole matching the central through hole of the first circuit board, and said electrical insulator is attached to the heat spreader.
2. The light module according to claim 1 , wherein the outer perimeter of the second circuit board substantially matches the circumference of the central through hole of the first circuit board.
3. The light module according to claim 1 , wherein the heat spreader is plate-shaped.
4. The light module according to claim 1 , wherein the heat spreader closes the rear of the housing.
5. The light module according to claim 1 , wherein the second circuit board is in physical contact with the heat spreader.
6. The light module according to claim 1 , wherein the heat spreader is attached to the housing by means of screws ( 46 a - c ).
7. The light module according to claim 6 , wherein the heat spreader at said screws comprises portions ( 48 a - c ) that protrude towards the first circuit board.
8. The light module according to claim 7 , wherein the heat spreader at each of said portions that protrude towards the first circuit board comprises a recess ( 52 a - c ) adapted to accommodate the head of one of said screws.
9. The light module according to claim 1 , wherein said gap is less than 3 mm.
10. A method of assembling a light module, which method comprises:
providing a housing;
placing a first circuit board in the housing, the first circuit board comprising a central through hole, a front side on which driver electronics through-hole components are mounted, and a back side from which leads of the driver electronics through-hole components protrude;
placing a second circuit board, the second circuit board comprising at least one solid-state lighting element adapted to emit light, wherein the second circuit board is arranged in level with the first circuit board or in a plane behind the first circuit board;
placing a heat spreader arranged behind the first and second circuit boards and an electrical insulator arranged between the first circuit board and the heat spreader,
wherein the electrical insulator comprises a central through hole matching the central through hole of the first circuit board.
11. A method according to claim 10 , further comprising:
closing the rear of the housing by means of the heat spreader; and
attaching the heat spreader to the housing by means of screws ( 46 a - c ).