Liquid crystal display device
View Patent ↗A glass substrate ( 101 ) being an active matrix substrate and a resin film substrate ( 102 ) being a counter electrode are opposingly arranged on a surface of an alignment layer 132 , and a liquid crystal layer ( 110 A) is arranged therebetween. Each of polarizing plates ( 118, 119 ) is formed on an outer surface of the glass substrate ( 101 ) and the resin film substrate ( 102 ) forming a counter electrode. An uniaxial absorption anisotropy is imparted to the resin film substrate ( 102 ).
1. A liquid crystal display device, comprising:
a pair of substrates;
a polarizing plate arranged on at least one of the pair of substrates;
a liquid crystal layer arranged between the pair of substrates; and
a group of electrodes formed on at least one of the pair of substrates, for applying an electric field to the liquid crystal layer,
wherein at least one of the pair of substrates has a uniaxial absorption an isotropy;
wherein the polarizing plate includes a polarizing plate protective film and an adhesive layer for bonding at least one of the pair of substrates and the polarizing plate;
wherein at least one of the pair of substrates, the polarizing plate protective film, and the adhesive layer includes a pigment added thereto;
wherein the at least one of the pair of substrates, the polarizing plate protective film, and the adhesive layer which includes the pigment added thereto has a dichroic ratio of at least 2;
wherein the at least one of the pair of substrates, the polarizing plate protective film, and the adhesive layer which includes the pigment added thereto has a region where an absorbance of an absorption axis is at least 0.2; and
wherein a difference of absorbances between an absorption axis and a transmission axis is at least 0.1, which is shown by the at least one of the pair of substrates having the uniaxial absorption anisotropy.
2. A liquid crystal display device according to claim 1 , wherein the at least one of the pair of substrates has the uniaxial absorption anisotropy in a wavelength range of 380 nm to 780 nm.
3. A liquid crystal display device according to claim 1 , wherein a region where the dichroic ratio is at least 2 is in a wavelength range of 550 nm to 780 nm of the at least one of the pair of substrates having the uniaxial absorption anisotropy.
4. A liquid crystal display device according to claim 1 , wherein a region where the dichroic ratio is at least 2 is in a wavelength range of 450 nm to 680 nm of the at least one of the pair of substrates having the uniaxial absorption anisotropy.
5. A liquid crystal display device according to claim 1 , wherein a region where the dichroic ratio is at least 2 is in a wavelength range of 380 nm to 550 nm of the at least one of the pair of substrates having the uniaxial absorption anisotropy.
6. A liquid crystal display device according to claim 2 , wherein the region where an absorbance of an absorption axis is at least 0.2 is in a wavelength range of 550 nm to 780 nm, which is shown by the at least one of the pair of substrates having the uniaxial absorption anisotropy.
7. A liquid crystal display device according to claim 2 , wherein the region where an absorbance of an absorption axis is at least 0.2 is in a wavelength range of 450 nm to 650 nm, which is shown by the at least one of the pair of substrates having the uniaxial absorption anisotropy.
8. A liquid crystal display device according to claim 2 , wherein a region where an absorbance of an absorption axis in a wavelength range of 380 nm to 550 nm is at least 0.2, which is shown by the having the uniaxial absorption anisotropy.
9. A liquid crystal display device according to claim 2 , wherein the difference of absorbances between the absorption axis and the transmission axis in a wavelength range of 550 nm to 780 nm.
10. A liquid crystal display device according to claim 2 , wherein the difference of absorbances between the absorption axis and the transmission axis is in a wavelength range of 450 nm to 650 nm.
11. A liquid crystal display device according to claim 2 , wherein the difference of absorbances between the absorption axis and the transmission axis in a wavelength range of 370 nm to 550 nm.
12. A liquid crystal display device according to claim 2 , wherein a maximum value of an absorbance in a wavelength range of 380 nm to 780 nm, which is shown by the at least one of the pair of substrates having the uniaxial absorption anisotropy locates in a wavelength range of 380 nm to 550 nm.
13. A liquid crystal display device according to claim 1 , wherein the at least one of the pair of substrates is formed of a resin with the pigment added thereto.
14. A liquid crystal display device according to claim 13 , wherein the uniaxial absorption anisotropy of the at least one of the pair of substrates is caused by irradiation of substantially linearly polarized light and/or being stretched.
15. A liquid crystal display device according to claim 14 , wherein the pigment comprises a photoisomerization compound.
16. A liquid crystal display device according to claim 13 , wherein an absorption axis of the at least one of the pair of substrates having the uniaxial absorption anisotropy is substantially parallel or perpendicular to one of absorption axes of a pair of polarizing plates.
17. A liquid crystal display device according to claim 1 , wherein an alignment layer is disposed between the liquid crystal layer and the group of electrodes, and the alignment layer is added with pigment.
18. A liquid crystal display device according to claim 1 , wherein the polarizing plate protective film has the pigment added thereto.
19. A liquid crystal display device according to claim 1 , wherein the adhesive layer has the pigment added thereto.