Pattern generator using liquid crystal and method thereof
AssigneeKyungpook National University Industry-Academic Cooperation Foundation
InventorHak-Rin KIM
Life of this patent
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Abstract
The dynamic fringe pattern generating apparatus includes a liquid crystal layer including a first area and a second area, a lower layer and an upper layer. The upper layer includes a slit array layer where a micro-slit array including a common slit and a plurality of selection slits are formed and an upper transparent electrode layer where a reference electrode and a plurality of selection electrodes are formed. In the dynamic fringe pattern generating apparatus, different fringe patterns are phase-shifted by sequentially controlling a voltage applied to the reference electrode and to the selection electrodes.
Claims18
A dynamic fringe pattern generating apparatus comprising:
- a liquid crystal layer configured to include a first area where liquid crystal is aligned in a first mode and a second area where liquid crystal is aligned in a second mode;
- a lower layer disposed on a first plane of the liquid crystal layer;
- and
- an upper layer disposed on a second plane facing the first plane of the liquid crystal layer,
- wherein the lower layer is configured to include:
- a lower alignment layer which is disposed to be in contact with first plane of the liquid crystal layer and is aligned in a first direction;
- and
- a lower transparent electrode layer which is disposed so that the one surface is in contact with the lower alignment layer,
- wherein the upper layer is configured to include:
- a transparent substrate constructed with an insulating material;
- an upper alignment layer which is disposed to be in contact with a second plane of the liquid crystal layer and is aligned so that regions corresponding to first and second areas of the liquid crystal layer are aligned in different alignment directions;
- an upper transparent electrode layer which is disposed between the first plane of the transparent, substrate and the upper alignment layer and is configured to a single reference electrode formed at a position corresponding to the first area and a plurality of selection electrodes formed at positions corresponding to the second area;
- and
- a slit array layer which is disposed on the second plane facing the first plane of the transparent substrate constructed with a non-transparent material and is configured to include a slit array including a common slit and a plurality of selection slits,
- wherein the common slit of the slit array is disposed above the first area of the liquid crystal layer, and the selection slits are disposed above the second area of the liquid crystal layer, and
- wherein the reference electrode and a plurality of the selection electrodes are disposed at positions corresponding to the common slit and the selection slits.
A method of manufacturing a dynamic fringe pattern generating apparatus, comprising steps of:
- (a) forming an upper layer;
- (b) forming a lower layer;
- and
- (c) disposing the upper layer and the lower layer to foe separated by a predetermined separation distance, adhering the upper and lower layers, injecting liquid crystal between the upper and lower layers,
- wherein the step (a) is configured to include steps of:
- (a1) depositing a transparent electrode material on a first plane of a transparent substrate and patterning so as to form an upper transparent electrode layer configured to include a plurality of electrodes;
- (a2) forming a slit array layer including a slit array configured to include a plurality of slits on a second plane facing the first plane of the transparent substrate;
- (a3) depositing an upper alignment layer on the first plane of the transparent substrate where the upper transparent electrode layer is formed;
- and
- (a4) dividing the upper alignment layer into a first area and a second area and alignment-processing the first area and the second area in different alignment directions, and
- wherein the step (b) is configured to include steps of:
- (b1) forming a lower transparent electrode layer;
- (b2) forming a lower alignment layer on a first plane of the lower transparent electrode layer;
- (b3) alignment-processing the lower alignment layer in one alignment direction.
Dependencies are inferred from the claim text.