Liquid crystal display device, electronic equipment, and method of manufacturing liquid crystal display device
View Patent ↗A liquid crystal display device of electrically controlled birefringence mode includes the combination of a liquid crystal cell having a liquid crystal layer sandwiched between a pair of substrates, and a hybrid retardation layer in which liquid crystal molecules are hybrid-aligned, and the hybrid retardation layer is formed by deposition at the liquid crystal layer side on one substrate of the pair of substrates.
1. A liquid crystal display device of electrically controlled birefringence mode, the liquid crystal display device comprising the combination of:
a liquid crystal cell having a liquid crystal layer sandwiched between a pair of substrates; and
a hybrid retardation layer in which liquid crystal molecules are hybrid-aligned,
wherein the hybrid retardation layer is formed by deposition at the liquid crystal layer side on one substrate of the pair of substrates, and
wherein an alignment direction of the hybrid retardation layer and an alignment direction of the liquid crystal layer at the hybrid retardation layer side form an angle from 150° to 210°.
2. The liquid crystal display device according to claim 1 , wherein the liquid crystal molecules that form the hybrid retardation layer have positive refractive anisotropy.
3. The liquid crystal display device according to claim 1 , wherein a pixel electrode and a drive element that drives the pixel electrode are provided on the other substrate of the pair of substrates.
4. The liquid crystal display device according to claim 1 , wherein a λ/4 retardation layer is provided on an outer side of the liquid crystal cell or between the hybrid retardation layer and the one substrate.
5. The liquid crystal display device according to claim 4 , wherein retardation obtained by subtracting retardation of the λ/4 retardation layer from a sum of retardation of the hybrid retardation layer and retardation of the liquid crystal layer in white presentation when no voltage is applied is λ/2, and
wherein retardation obtained by subtracting retardation of the λ/4 retardation layer from a sum of retardation of the hybrid retardation layer and retardation of the liquid crystal layer in black presentation when a voltage is applied is zero.
6. The liquid crystal display device according to claim 1 , wherein a color filter is provided at the liquid crystal layer side of the hybrid retardation layer or between the hybrid retardation layer and the one substrate.
7. The liquid crystal display device according to claim 1 , wherein the liquid crystal molecule that forms the hybrid retardation layer has a molecule structure in which acrylate group is bonded to nematic liquid crystal.
8. The liquid crystal display device according to claim 1 , wherein the liquid crystal cell has a reflective display region and a transmissive display region with respect to each pixel.
9. A liquid crystal display device, of electrically controlled birefringence mode, the liquid crystal display device comprising:
a liquid crystal cell having a liquid crystal layer sandwiched between a pair of substrates; and
a hybrid retardation layer in which liquid crystal molecules are hybrid-aligned,
wherein the hybrid retardation layer is formed by deposition at the liquid crystal layer side on one substrate of the pair of substrates,
wherein a λ/4 retardation layer is provided on an outer side of the liquid crystal cell or between the hybrid retardation layer and the one substrate, and
wherein an alignment axis of the hybrid retardation layer and an optical axis of the λ/4 retardation layer form an angle from 80° to 100°.
10. A liquid crystal display device of electrically controlled birefringence mode, the liquid crystal display device comprising:
a liquid crystal cell having a liquid crystal layer sandwiched between a pair of substrates; and
a hybrid retardation layer in which liquid crystal molecules are hybrid-aligned,
wherein the hybrid retardation layer is formed by deposition at the liquid crystal layer side on one substrate of the pair of substrates,
wherein a sum of retardation of the hybrid retardation layer and retardation of the liquid crystal layer when no voltage is applied is 3λ/4, and
wherein a sum of retardation of the hybrid retardation layer and retardation of the liquid crystal layer when a voltage is applied is λ/4.
11. Electronic equipment comprising a liquid crystal display device of electrically controlled birefringence mode including a liquid crystal cell having a liquid crystal layer sandwiched between a pair of substrates and a hybrid retardation layer in which liquid crystal molecules are hybrid-aligned in combination,
wherein the hybrid retardation layer is formed by deposition at the liquid crystal layer side on one substrate of the pair of substrates, and
wherein an alignment direction of the hybrid retardation layer and an alignment direction of the liquid crystal layer at the hybrid retardation layer side form an angle from 150° to 210°.
12. A method of manufacturing a liquid crystal display device comprising the steps of:
forming a hybrid retardation layer in which liquid crystal molecules are hybrid-aligned on a first substrate; and
filling and sealing a space between the first substrate and a second substrate oppositely provide data formation surface of the hybrid retardation layer on the first substrate with a liquid crystal layer,
wherein, at the step of forming the hybrid retardation layer by deposition,
depositing a material film of the hybrid retardation layer using light cure liquid crystal via an alignment film on the first substrate, and
exposing the material film to light while controlling viewing angle dependency of retardation with heating temperature of the material film, and thereby, forming by deposition the hybrid retardation layer having the material film cured.
13. A method of manufacturing a liquid crystal display device comprising the steps of:
forming a hybrid retardation layer in which liquid crystal molecules are hybrid-aligned on a first substrate; and
filling and sealing a space between the first substrate and a second substrate oppositely provided at a formation surface of the hybrid retardation layer on the first substrate with a liquid crystal layer,
wherein, at the step of forming the hybrid retardation layer by deposition,
depositing a material film of the hybrid retardation layer using light cure liquid crystal via an alignment film on the first substrate,
forming by deposition the hybrid retardation layer having the material film cured by exposure to light, removing a surface layer of the hybrid retardation layer to a predetermined thickness, and thereby, controlling viewing angle dependency of retardation in the hybrid retardation layer.