Light emitting device with microlens array

Details Light emitting device with microlens array Light emitting device with microlens array

2011-04-26

2011-04-26

Williams, Joseph L (Department: 2889)

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

C445S050000, C430S314000

Reexamination Certificate

active

07931515

ABSTRACT:
A method of manufacturing a micro-lens array and light-emitting device, comprising forming a first structured polymer film with close packed surface cavities having a mean diameter of less than 20 micrometers and a relatively lower surface energy surface, forming a transparent second structured film with an array of microlenses formed thereon corresponding to the cavities of the first structured film, wherein the second structured film comprises a relatively high surface energy material and has a refractive index greater than 1.45, and wherein the microlenses are randomly distributed, separating the second structured film with the micro-lens array from the first structured polymer film, and attaching the second structured film to a transparent substrate or cover of a light-emitting device through which light is emitted. Use of microlens arrays formed from relatively high surface energy materials enables matching refractive index of microlens array to that of light-emitting devices substrate or cover through which light is emitted and relatively high elastic modulus providing good scratch resistance.

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