Liquid crystal device and electronic apparatus
View Patent ↗A liquid crystal device includes: a liquid crystal layer which is sandwiched between a pair of substrates; a color filter layer has a first coloration layer for transmitting a first light and a second coloration layer for transmitting a second light; first electrodes has a first pixel electrode disposed on a first sub-pixel region corresponding to a planar region of the first coloration layer and a second pixel electrode disposed on a second sub-pixel region corresponding to a planar region of the second coloration layer; and second electrodes each of which faces each first electrode. Any one electrode of each first electrode and each second electrode has a plurality of band-like portions which are arranged at predetermined intervals. A layer thickness of the liquid crystal layer, a width of each band-like portion, and the predetermined intervals within the first sub-pixel region are smaller than they within the second sub-pixel region.
1. A liquid crystal device comprising:
a pair of substrates which are formed of a first substrate and a second substrate disposed to face each other;
a liquid crystal layer which is sandwiched between the pair of substrates;
a color filter layer which is formed on the second substrate and has at least a first coloration layer for transmitting light of a first wavelength region and a second coloration layer for transmitting light of a second wavelength region on a longer wavelength side than the first wavelength region;
first electrodes each of which is formed on the first substrate and has at least a first pixel electrode disposed on a first sub-pixel region corresponding to a planar region of the first coloration layer and a second pixel electrode disposed on a second sub-pixel region corresponding to a planar region of the second coloration layer; and
second electrodes each of which faces each first electrode with a dielectric layer interposed therebetween,
wherein any one electrode of each first electrode and each second electrode has a plurality of band-like portions which are arranged at predetermined intervals in parallel to each other in the first and second sub-pixel regions,
wherein a layer thickness of the liquid crystal layer within the first sub-pixel region is smaller than a layer thickness of the liquid crystal layer within the second sub-pixel region,
wherein a width of each band-like portion within the first sub-pixel region is smaller than a width of each band-like portion within the second sub-pixel region,
wherein the predetermined intervals within the first sub-pixel region are smaller than the predetermined intervals within the second sub-pixel region, and
wherein a layer thickness of the dielectric layer within the first sub-pixel region is smaller than a layer thickness of the dielectric layer within the second sub-pixel region.
2. The liquid crystal device according to claim 1 ,
wherein values of at least one item of the total four items of a layer thickness of the liquid crystal layer, a width of the band-like portion, the predetermined intervals, and a layer thickness of the dielectric layer satisfy a relationship of approximate equivalence between
a ratio of the value of the item within the first sub-pixel region to the value of the item within the second sub-pixel region and
a ratio of λ 1 ·Δn(λ 2 ) to λ 2 ·Δn(λ 1 ),
where λ 1 is a peak wavelength of the first wavelength region, λ 2 is a peak wavelength of the second wavelength region, Δn(λ 2 ) is a refractive index anisotropy of the liquid crystal layer at the peak wavelength λ 2 , and Δn(λ 1 ) is a refractive index anisotropy of the liquid crystal layer at the peak wavelength λ 1 .
3. The liquid crystal device according to claim 2 ,
wherein a layer thickness of the first coloration layer is larger than a layer thickness of the second coloration layer,
wherein at least a part of a difference between the layer thickness of the liquid crystal layer within the first sub-pixel region and the layer thickness of the liquid crystal layer within the second sub-pixel region is formed by a difference between the layer thickness of the first coloration layer and the layer thickness of the second coloration layer.
4. The liquid crystal device according to claim 2 ,
wherein a liquid-crystal-thickness adjustment layer is formed in the first sub-pixel region on a side of the second substrate facing the liquid crystal layer,
wherein at least a part of a difference between the layer thickness of the liquid crystal layer within the first sub-pixel region and the layer thickness of the liquid crystal layer within the second sub-pixel region is formed by the liquid-crystal-thickness adjustment layer.
5. The liquid crystal device according to claim 2 ,
wherein a first liquid-crystal-thickness adjustment layer is formed in the first sub-pixel region on a side of the second substrate facing the liquid crystal layer,
wherein a second liquid-crystal-thickness adjustment layer is formed in the second sub-pixel region on the side of the second substrate facing the liquid crystal layer so as to be thinner than the first liquid-crystal-thickness adjustment layer, and
wherein at least a part of a difference between the layer thickness of the liquid crystal layer within the first sub-pixel region and the layer thickness of the liquid crystal layer within the second sub-pixel region is formed by a difference between the first liquid-crystal-thickness adjustment layer and the second liquid-crystal-thickness adjustment layer.
6. The liquid crystal device according to claim 2 , further comprising:
a third coloration layer which transmits light of a wavelength region corresponding to red light; and
a third sub-pixel region which corresponds to a planar region of the third coloration layer,
wherein the first wavelength region is a wavelength region corresponding to blue light, and
wherein the second wavelength region is a wavelength region corresponding to green light.
7. The liquid crystal device according to claim 6 ,
wherein values of at least one item of the total four items of the layer thickness of the liquid crystal layer, the width of the band-like portion, the predetermined intervals, and the layer thickness of the dielectric layer satisfy a relationship of approximate equivalence between
a ratio of the value of the item within the second sub-pixel region to the value of the item within the third sub-pixel region and
a ratio of λ 2 ·Δn(λ 3 ) to λ 3 ·Δn(λ 2 ),
where λ 3 is a peak wavelength of the wavelength region corresponding to the red light, and Δn(λ 3 ) is a refractive index anisotropy of the liquid crystal layer at the peak wavelength λ 3 .
8. The liquid crystal device according to claim 7 ,
wherein a layer thickness of the second coloration layer is larger than a layer thickness of the third coloration layer,
wherein at least a part of a difference between the layer thickness of the liquid crystal layer within the second sub-pixel region and the layer thickness of the liquid crystal layer within the third sub-pixel region is formed by a difference between the layer thickness of the second coloration layer and the layer thickness of the third coloration layer.
9. The liquid crystal device according to claim 7 ,
wherein a liquid-crystal-thickness adjustment layer is formed in the second sub-pixel region on a side of the second substrate facing the liquid crystal layer,
wherein at least a part of a difference between the layer thickness of the liquid crystal layer within the second sub-pixel region and the layer thickness of the liquid crystal layer within the third sub-pixel region is formed by the liquid-crystal-thickness adjustment layer.
10. An electronic apparatus comprising a display section which is provided with the liquid crystal device according to claim 1 .