Liquid crystal display device using cholesteric liquid crystal and a manufacturing method thereof
View Patent ↗A liquid crystal display device includes a liquid crystal cell having a cholesteric liquid crystal color filter; an integrated collimating polarizer under the liquid crystal cell, the integrated collimating polarizer having a collimating layer and a circular polarizer on the collimating layer; a backlight under the integrated collimating polarizer; a diffusing layer over the liquid crystal cell; a retardation layer over the diffusing layer; and a linear polarizer over the retardation layer.
1. A liquid crystal display device, comprising:
a liquid crystal cell;
a collimating polarizer under the liquid crystal cell, the collimating polarizer having a collimating layer, a circular polarizer and a transparent substrate between the collimating layer and the circular polarizer;
a backlight under the collimating polarizer;
a diffusing layer over the liquid crystal cell;
a retardation layer over the diffusing layer; and
a linear polarizer over the retardation layer.
2. A method of fabricating an integrated collimating polarizer for a liquid crystal display device, comprising:
providing a first transparent substrate;
coating a cholesteric liquid crystal on the first transparent substrate;
exposing and hardening the cholesteric liquid crystal to form a pitch of the cholesteric liquid crystal;
coating a resin on the cholesteric liquid crystal; and
patterning and hardening the resin to form a collimating layer.
3. The method according to claim 2 , further comprising disposing a second transparent substrate on the cholesteric liquid crystal.
4. The method according to claim 2 , further comprising forming first and second protection films on the collimating layer and under the cholesteric liquid crystal, respectively.
5. The method according to claim 2 , wherein a stamp is used in patterning the resin.
6. The method according to claim 2 , wherein embossing is used in patterning the resin.
7. The method according to claim 2 , wherein the exposing and hardening are provided using ultraviolet light.
8. The method according to claim 2 , wherein the exposing and hardening are provided using heat.
9. A method of fabricating an integrated collimating polarizer for a liquid crystal display device, comprising:
providing a first transparent substrate;
coating a cholesteric liquid crystal on the first transparent substrate;
providing a second transparent substrate on the cholesteric liquid crystal layer;
exposing and hardening the cholesteric liquid crystal to form a pitch of the cholesteric liquid crystal;
coating a resin on the cholesteric liquid crystal; and
patterning and hardening the resin to form a collimating layer.
10. The method according to claim 9 , wherein the exposing and hardening are provided using ultraviolet light.
11. The method according to claim 9 , wherein the exposing and hardening are provided using heat.
12. The method according to claim 9 , further comprising passing the first and second substrates with the cholesteric liquid crystal therebetween through rollers before exposing and hardening the cholesteric liquid crystal.