1. An optical filter for a stereoscopic display device separating left-view and right-view images, the optical filter comprising:
a substrate;
an alignment layer formed on the substrate in a predetermined pattern and having a partition wall part on an edge of the alignment layer; and
a liquid crystal layer formed on the alignment layer,
wherein a height of the partition wall part is two to ten times greater than a thickness of a center part of the alignment layer.
2. The optical filter of claim 1, wherein the height of the partition wall part is three to seven times greater than the thickness of the center part of the alignment layer.
3. The optical filter of claim 1, wherein the height of the partition wall part is five to six times greater than the thickness of the center part of the alignment layer.
4. The optical filter of claims 1,wherein the thickness of the center part of the alignment layer is 20 nm to 500 nm.
5. The optical filter of claim 1, wherein the alignment layer is composed of an alignment layer forming composition comprising 1 wt % to 5 wt % of a norbornene monomer substituted with fluorine or a cinnamate group, 1 wt % to 6 wt % of an acrylate monomer, 0.1 wt % to 2 wt % of a photoinitiator; and a solvent for the remainder.
6. The optical filter of claim 5, wherein a boiling point of the alignment layer forming composition is 130\xb0 C. to 180\xb0 C.
7. The optical filter of claim 5, wherein viscosity of the alignment layer forming composition is 4 cp to 20 cp.
8. The optical filter of claim 5, wherein the alignment layer forming composition loses weight by 1 wt % to 40 wt % after being dried for three minutes at a temperature of 50\xb0 C. to 150\xb0 C.
9. The optical filter of claim 5, wherein a boiling point of the alignment layer forming composition is 130\xb0 C. to 180\xb0 C., viscosity of the alignment layer forming composition is 4 cp to 20 cp, and the alignment layer forming composition loses weight by 1 wt % to 40 wt % after being dried for three minutes at a temperature of 50\xb0 C. to 150\xb0 C.
10. The optical filter of claim 7, wherein the alignment layer is formed by using an inkjet printing method.
11. The optical filter of claim 1, wherein a thickness of the liquid crystal layer is 1 \u03bcm to 2 \u03bcm.
12. A stereoscopic display device comprising the optical filter of claim 1.
13. A method for manufacturing an optical filter for a stereoscopic display device separating left-view and right-view images, the method comprising the steps of:
(a) forming an alignment layer in a predetermined pattern by printing an alignment layer forming composition on a substrate, and then by drying the printed alignment layer forming composition, wherein a partition wall part is formed on an edge of the alignment layer; and
(b) forming a liquid crystal layer on the alignment layer.
14. The method of claim 13, wherein the drying is performed for one to five minutes at a temperature of 50\xb0 C. to 150\xb0 C.
15. The method of claim 14, wherein a height of the partition wall part is two to ten times greater than a thickness of a center part of the alignment layer.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A projection screen, comprising:
an upper housing;
an upper roller pivoted in the upper housing;
a reflecting curtain wound on the upper roller and having a first reflecting surface to form a first projection area;
a lower housing fixed at a free end of the reflecting curtain;
a first lower roller pivoted in the lower housing;
a first lower mask wound on the first lower roller; and
a positioning assembly detachably connecting a free end of the first lower mask to the reflecting curtain so as to make the first lower mask cover a portion of the first reflecting surface of the reflecting curtain for defining the boundary of the first projection area.
2. The projection screen according to claim 1, further comprising:
a fixed shaft fixed in the lower housing, wherein the free end of the reflecting curtain is fixed on the fixed shaft.
3. The projection screen according to claim 1, further comprising:
an upper driver disposed between the upper housing and the upper roller for driving the upper roller to fold by winding or unfold the reflecting curtain.
4. The projection screen according to claim 1, further comprising:
a first lower driver disposed between the lower housing and the first lower roller for driving the first lower roller to fold by winding or unfold the first lower mask.
5. The projection screen according to claim 1, further comprising:
a pair of first side masks respectively disposed at the opposite two sides of the reflecting curtain and located between the upper housing and the lower housing for covering two portions of the first reflecting surface respectively so as to define the boundary of the first projection area.
6. The projection screen according to claim 1, further comprising:
a first upper mask connected to the upper housing for covering a portion of the first reflecting surface so as to define the boundary of the first projection area.
7. The projection screen according to claim 1, wherein the positioning assembly comprises:
a first index mark disposed on the reflecting curtain.
8. The projection screen according to claim 1, further comprising:
a second lower roller fixed in the lower housing; and
a second lower mask wound on the second lower roller,
wherein the positioning assembly comprises:
a first positioning component fixed at the free end of the first lower mask; and
a second positioning component fixed at a free end of the second lower mask and coupled to the first positioning component to hold the reflecting curtain so as to fix the first lower mask and the second lower mask onto the reflecting curtain.
9. The projection screen according to claim 8, wherein the first positioning component and the second positioning component are magnetic components.
10. The projection screen according to claim 8, further comprising:
a first lower driver disposed between the lower housing and the first lower roller for driving the first lower roller to fold by winding or unfold the first lower mask; and
a second lower driver disposed between the lower housing and the second lower roller for driving the second lower roller to fold by winding or unfold the second lower mask.
11. The projection screen according to claim 8, wherein the reflecting curtain further has a second reflecting surface opposite to the first reflecting surface, the second reflecting surface forms a second projection area, and the second lower mask covers a portion of the second reflecting surface so as to define the boundary of the second projection area.
12. The projection screen according to claim 11, further comprising:
a pair of first side masks respectively disposed at the two opposite sides of the reflecting curtain and located between the upper housing and the lower housing to cover two portions of the first reflecting surface respectively so as to define the boundary of the first projection area; and
a pair of second side masks respectively disposed at the two opposite sides of the reflecting curtain and located between the upper housing and the lower housing to cover two portions of the second reflecting surface respectively so as to define the boundary of the second projection area.
13. The projection screen according to claim 11, further comprising:
a first upper mask connected to the upper housing to cover a portion of the first reflecting surface so as to define the boundary of the first projection area; and
a second upper mask connected to the upper housing to cover a portion of the second reflecting surface so as to define the boundary of the second projection area.
14. The projection screen according to claim 11, wherein the positioning assembly further comprises:
a first index mark disposed on a side of the reflecting curtain; and
a second index mark disposed on the other side of the reflecting curtain.
15. The projection screen according to claim 1, wherein the positioning assembly comprises:
a first positioning component fixed at the free end of the first lower mask; and
a second positioning component fixed to the reflecting curtain so as to be detachably connected to the first positioning component.
16. The projection screen according to claim 15, wherein the first positioning component and the second positioning component are magnetic components.
17. The projection screen according to claim 15, wherein the first positioning component and the second positioning component are locking components.
18. The projection screen according to claim 1, wherein the positioning assembly comprises:
a first positioning component fixed at the free end of the first lower mask; and
a plurality of second positioning components fixed to the reflecting curtain, wherein the first positioning component is detachably connected to one of the second positioning components.
19. The projection screen according to claim 18, wherein the first component and the second positioning components are magnetic components.
20. The projection screen according to claim 18, wherein the first component and the second positioning components are locking components.