US Patent No. 9,997,684

PRE-ROTATED OVERMOULDED BIDIRECTIONAL SPREADING LENS FOR STRETCHED LEADFRAME ARCHITECTURE


Patent No. 9,997,684
Issue Date June 12, 2018
Title Pre-rotated Overmoulded Bidirectional Spreading Lens For Stretched Leadframe Architecture
Inventorship Serge Joel Armand Bierhuizen, San Jose, CA (US)
Giovanni Cennini, Eindhoven (NL)
Assignee LUMILEDS LLC, San Jose, CA (US)

Claim of US Patent No. 9,997,684

1. A method for manufacturing a solid state light-emitting device (LED) lighting apparatus, comprising:forming a leadframe assembly comprising:
leadframes spaced apart at a first pitch, each leadframe comprising one or more pads; and
interconnects in an initial folded state, each interconnect linking two adjacent leadframes;
mounting LEDs on the leadframes;
disposing bidirectional spreading lenses 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; and
stretching the leadframe assembly so the interconnects unfold to space apart the LEDs at a second pitch greater than the first pitch;
the spreading axis being aligned with a stretch axis along the length of the stretched leadframe assembly after the leadframe assembly is stretched.