Optical shutter for camera module and production method thereof
AssigneeSharp Kabushiki Kaisha
InventorsMASANOBU MIZUSAKI, KIYOSHI MINOURA
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Abstract
The present invention provides a highly reliable optical shutter for camera modules capable of preventing the occurrence of a streaky transparent portion in a polymer network liquid crystal layer in a scattering state, and a method for producing the optical shutter for camera modules. The optical shutter for camera modules includes: a pair of substrates bonded together with a seal; and a polymer network liquid crystal layer sealed between the substrates, wherein at least one of the substrates includes a transparent electrode made of an oxide conductive film and a coating film that covers the transparent electrode and contains a polymer with a polyamic acid structure in a main chain.
Claims12
An optical shutter for camera modules, comprising:
- a pair of substrates bonded together with a seal;
- and
- a polymer network liquid crystal layer sealed between the substrates,
- wherein at least one of the substrates includes a transparent electrode made of an oxide conductive film and a coating film covering the transparent electrode and containing a polymer with a polyamic acid structure in a main chain.
A method for producing an optical shutter for camera modules, the method comprising:
- forming a coating film containing a polymer with a polyamic acid structure in a main chain on a transparent electrode that is made of an oxide conductive film and included in a first substrate;
- disposing an uncured sealant in a frame shape on the first substrate or a second substrate;
- dropping a liquid crystal material containing a polymer network forming monomer on the first substrate or the second substrate;
- overlaying the second substrate on the first substrate via the uncured sealant;
- and
- curing the uncured sealant and polymerizing the polymer network forming monomer in the liquid crystal material.
Dependencies are inferred from the claim text.