Solid State Light Strips Containing LED Dies in Series
First Claim
1. A lighting device comprising:
- a first substrate having first connection locations electrically connected to first conductors formed on the first substrate;
a plurality of non-packaged light emitting diode (LED) dies, each die having at least a first die electrode and a second die electrode, the first die electrode of associated dies being aligned with and electrically connected to an associated first connection location on the first substrate without wire bonds; and
a second substrate affixed over the LED dies and first substrate, the first substrate and second substrate sandwiching at least a group of LED dies and forming a strip enclosing the group, at least portions of the first conductors connecting the LED dies in the group in series,the second substrate allowing light from the group to pass through a surface of the strip.
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Accused Products
Abstract
A solid state light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. The bottom electrodes of an array of LEDs (e.g., 500 LEDs) are bonded to an array of electrodes formed on a flexible bottom substrate. Conductive traces are formed on the bottom substrate connected to the electrodes. A transparent top substrate is then formed over the bottom substrate. Various ways to connect the LEDs in series are described along with many embodiments. In one method, the top substrate contains a conductor pattern that connects to LED electrodes and conductors on the bottom substrate.
105 Citations
20 Claims
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1. A lighting device comprising:
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a first substrate having first connection locations electrically connected to first conductors formed on the first substrate; a plurality of non-packaged light emitting diode (LED) dies, each die having at least a first die electrode and a second die electrode, the first die electrode of associated dies being aligned with and electrically connected to an associated first connection location on the first substrate without wire bonds; and a second substrate affixed over the LED dies and first substrate, the first substrate and second substrate sandwiching at least a group of LED dies and forming a strip enclosing the group, at least portions of the first conductors connecting the LED dies in the group in series, the second substrate allowing light from the group to pass through a surface of the strip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification