Light fixture with dynamically controllable light distribution
A flexible printed circuit board and method of fabrication are disclosed. The flexible printed circuit board has a flexible body with multiple segments. Each segment has multiple body contacts that are electrically isolated from body contacts of each other segment. The flexible printed circuit further has multiple flexible legs in which each leg extends from a different segment and contains multiple leg contacts disposed proximate to a distal end of the leg from the body. Each leg contact is connected with a different body contact of the leg. The flexible printed circuit board is formed from a multilayer structure that includes: a dielectric layer, a metal layer adjacent to the dielectric layer, and a solder mask layer adjacent to the metal layer, the solder mask layer exposing portions of the metal layer to form the body contacts.
1. A flexible printed circuit board comprising:
a flexible body comprising a plurality of segments, each segment comprising a plurality of body contacts that are electrically isolated from the plurality of body contacts of each other segment; and
a plurality of flexible legs, each leg:
adjacent to another of the legs,
extending from a different segment of the plurality of segments, and
comprising a plurality of leg contacts disposed more proximate to a distal end of the leg from the flexible body than to the flexible body, each leg contact coupled with a different body contact of the segment from which the leg extends.
2. The flexible printed circuit board of claim 1 , wherein:
the flexible printed circuit board is formed from a multilayer structure that comprises:
a dielectric layer,
a metal layer adjacent to the dielectric layer, and
a solder mask layer adjacent to the metal layer, the solder mask layer exposing portions of the metal layer to form the body contacts.
3. The flexible printed circuit board of claim 2 , wherein the multilayer structure further comprises:
an adhesive layer configured to adhere the structure to a material contacting the adhesive layer.
4. The flexible printed circuit board of claim 2 , wherein:
the solder mask layer exposes portions of the metal layer to form the leg contacts.
5. The flexible printed circuit board of claim 2 , wherein:
the dielectric layer exposes portions of the metal layer to form the leg contacts.
6. The flexible printed circuit board of claim 1 , wherein:
each segment comprises multiple plurality of body contacts that are electrically isolated from each other.
7. The flexible printed circuit board of claim 1 , wherein:
the flexible printed circuit board is formed from a multilayer structure that comprises:
an adhesive layer configured to adhere the structure to a material contacting the adhesive layer;
a solder mask layer configured to expose, for each segment, the plurality of body contacts and the plurality of leg contacts of the segment, and
a plurality of alternating dielectric and metal layers disposed between the adhesive layer and solder mask layer, each metal layer providing, for each segment, electrical connection between one of the plurality of the body contacts and a corresponding plurality of leg contacts of the segment, each metal layer electrically isolated from each other metal layer.
8. The flexible printed circuit board of claim 7 , wherein:
the solder mask layer exposes portions of each metal layer to form the leg contacts.
9. The flexible printed circuit board of claim 8 , wherein:
the dielectric layer exposes portions of each metal layer to form the leg contacts.
10. The flexible printed circuit board of claim 1 , wherein for each segment:
each leg of the segment comprises secondary leg contacts disposed more proximate to the body than to the leg contacts.
11. The flexible printed circuit board of claim 1 , wherein:
each segment comprises multiple plurality of body contacts and multiple plurality of leg contacts, and
for each segment, each plurality of body contacts of the segment is in electrical contact with a corresponding plurality of leg contacts of the segment, and each plurality of body contacts and corresponding plurality of leg contacts of the segment are electrically isolated from each other plurality of body contacts and corresponding plurality of leg contacts of the segment.
12. The flexible printed circuit board of claim 1 , wherein:
each leg further comprises a plurality of test contacts disposed between the leg contacts of the leg and the segment from which the leg extends.
13. The flexible printed circuit board of claim 1 , wherein:
a different leg extends from every segment of the body.
14. A method of fabricating a flexible printed circuit, the method comprising:
forming a metal layer on a flexible dielectric layer;
applying a solder mask over the metal layer, portions of the metal layer exposed through the solder mask forming body contacts; and
applying an adhesive to the dielectric layer,
the flexible printed circuit comprising a flexible body and a plurality of flexible legs extending from the flexible body, the flexible body comprising a plurality of segments, each of the legs extending from a different segment of the plurality of segments, each segment comprising the body contacts, the body contacts of each segment electrically isolated from the body contacts of each other segment, and the leg comprising leg contacts disposed more proximate to a distal end of the leg from the flexible body than to the flexible body, and
each leg being adjacent to another of the legs.
15. The method of claim 14 , wherein:
portions of the metal layer exposed through the solder mask form the leg contacts.
16. The method of claim 14 , further comprising:
removing portions of the dielectric layer to expose the metal layer and form the leg contacts prior to applying the solder mask.
17. The method of claim 14 , wherein:
the adhesive is applied to the dielectric layer after formation of the body contacts.
18. A flexible printed circuit comprising:
a body comprising a plurality of segments and a plurality of body contacts, each segment comprising at least one body contact of the plurality of body contacts; and
a flexible leg:
extending from the body, and
comprising multiple sets of leg contacts disposed more proximate to a distal end of the leg from the body than to the body, each set of leg contacts having a plurality of leg contacts that are electrically isolated, each set of leg contacts associated with:
a body contact of a different segment depending upon whether each segment contains a single body contact, and
a different set of body contacts within a particular segment depending upon whether the particular segment comprises multiple sets of body contacts, each set of body contacts having multiple body contacts.
19. The flexible printed circuit of claim 18 , wherein at least one of:
the sets of leg contacts is associated with different segments, or
the sets of leg contacts is associated with different sets of body contacts within the particular segment.
20. The flexible printed circuit board of claim 18 , wherein:
the flexible printed circuit board is formed from a multilayer structure that comprises:
an adhesive layer to attach the flexible printed circuit board to an underlying surface,
a metal layer to provide electrical connection between the body and leg contacts,
a dielectric layer adjacent to the metal layer, the adhesive layer attached to a portion of the dielectric layer, and
a solder mask layer configured to expose the metal layer to form the plurality of body contacts.
21. The flexible printed circuit board of claim 20 , wherein:
the metal layer is exposed through the dielectric layer to form the leg contacts.
22. The flexible printed circuit board of claim 18 , wherein each leg is adjacent to another of the legs.