Fine pixel pitch electrophoretic display
AssigneeVisitret Displays OU
InventorsAkihiro Mochizuki, Madis-Marius Vahtre, Laura Pait
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Abstract
High display duty ratio and fast optical response electrophoretic display technology is presented by using an anti-ferroelectric coupling torque. The invention also consequently enables fine pixel pitch resolution by introducing photo lithography based switching element preparation method. Newly introduced casting film method for optical switching element preparation enables extremely fine size of switching element based on current well-established flat panel display volume manufacturing process.
Claims18
An electrophoretic display comprising:
- a top substrate;
- a bottom substrate;
- a display medium comprising anti-ferroelectric particles and disposed between the top and bottom substrates;
- and
- electrodes that are configured to apply to the display medium a first voltage to induce spontaneous polarization in the anti-ferroelectric particles,
- wherein the anti-ferroelectric particles are configured to reflect ambient light so that the display acts as an electrophoretic display.
An electrophoretic display comprising:
- a top substrate;
- a bottom substrate;
- a cast and patterned photolithographic polymer film that is disposed between the top and bottom substrates and comprises ferroelectric or anti-ferroelectric particles,
- wherein said ferroelectric or anti-ferroelectric particle are configured to reflect ambient light so that the display acts as an electrophoretic display.
A method of preparing an electrophoretic display, comprising:
- mixing ferroelectric or anti-ferroelectric particles with a photolithographic polymer;
- casting the photolithographic polymer mixed with the particles to form a cast photolithographic polymer layer;
- placing the cast polymer layer on a first substrate comprising electrodes;
- performing a photolithographic pattering on the cast polymer layer;
- and
- placing a second substrate on the first substrate so that the patterned cast polymer layer is disposed between the first and second substrates.
A method of preparing an electrophoretic display, comprising:
- micro-milling a colored polymer film comprising anti-ferroelectric or ferroelectric oxide to form ferroelectric or anti-ferroelectric particles;
- mixing the ferroelectric or anti-ferroelectric particles with a fluid;
- preparing a cell comprising a first substrate and a second substrate;
- and
- inserting the fluid mixed with the particles into the cell.
Dependencies are inferred from the claim text.