Pre-rotated overmoulded bidirectional spreading lens for stretched leadframe architecture
View Patent ↗A solid state light-emitting device (LED) lighting apparatus comprising a leadframe assembly comprising leadframes spaced apart at a pitch, each leadframe comprising at least one pad, interconnects each linking two adjacent leadframes, LEDs mounted on the leadframes, and bidirectional spreading lenses disposed about the LEDs, each bidirectional spreading lens having a spreading axis and a null axis perpendicular to the spreading axis, each bidirectional spreading lens directing more light in opposite directions along the spreading axis than the null axis, the spreading axis being aligned along the length of the stretched leadframe assembly.
1. A solid state light-emitting device (LED) lighting apparatus, comprising:
a stretched leadframe assembly, comprising:
leadframes spaced apart at a pitch, each leadframe comprising at least one pad;
interconnects each linking two adjacent leadframes;
LEDs mounted on the leadframes; and
bidirectional spreading lenses disposed about the LEDs, each bidirectional spreading lens having a spreading axis and a null axis perpendicular to the spreading axis, each bidirectional spreading lens directing more light in opposite directions along the spreading axis than the null axis,
the spreading axis being aligned along the length of the stretched leadframe assembly.
2. The apparatus of claim 1 , wherein the bidirectional spreading lenses comprise reflector cups around the LEDs and an encapsulant in the reflector cups.
3. The apparatus of claim 1 , further comprising one or more reflectors, the stretched leadframe assembly being fixed relative to the one or more reflectors.
4. The apparatus of claim 3 , further comprising insulating strips over gaps between adjacent reflectors.
5. The apparatus of claim 4 , wherein the insulating strips are provided along the length of the reflectors.
6. The apparatus of claim 4 , wherein the insulating strips are provided along the width of the reflectors.
7. The apparatus of claim 1 , wherein the LEDs are prepackaged light-emitting diodes or naked light-emitting diode dice.
8. The apparatus of claim 1 , wherein each leadframe comprises a cathode pad and an anode pad.
9. The apparatus of claim 8 , wherein the anode pad has wing areas bent to form a mount for the leadframe.
10. The apparatus of claim 1 , wherein the interconnects are substantially straight.
11. The apparatus of claim 1 , wherein the interconnects are slightly bent.