Liquid crystal display device, methods for manufacturing the same, and electronic apparatus
View Patent ↗A liquid crystal display device whose sub-pixel region has a reflective display region that displays an image in a reflective mode and a transmissive display region that displays an image in a transmissive mode includes a first substrate, a second substrate opposing the first substrate; and a liquid crystal layer between the first substrate and the second substrate. The liquid crystal layer has a smaller thickness in the reflective display region than in the transmissive display region. One of the first substrate and the second substrate includes a reflection layer in the reflective display region, and the other substrate includes on the liquid crystal layer side a functional resin layer having a first functional resin sub layer in the reflective display region and a second functional resin sub layer in the transmissive display region. The first functional resin sub layer and the second functional resin sub layer serve as retardation layers with different optical axes from each other.
1. A liquid crystal display device whose sub-pixel region has a reflective display region that displays an image in a reflective mode and a transmissive display region that display an image in a transmissive mode, the liquid crystal display device comprising:
a first substrate;
a second substrate opposing the first substrate;
a polarizer disposed above the second substrate; and
a liquid crystal layer between the first substrate and the second substrate, the liquid crystal layer having a smaller thickness of about one half in the reflective display region than in the transmissive display region,
one of the first substrate and the second substrate including a reflection layer in the reflective display region, and the other substrate including on a liquid crystal layer side a functional resin layer having a first functional resin sub layer in the reflective display region and a second functional resin sub layer in the transmissive display region,
a thickness adjustment layer being formed directly on the first functional resin sub layer, and an alignment layer formed to cover the thickness adjustment layer in the reflective display region and to cover the second functional resin sub layer in the transmissive display region,
the second functional resin sub layer being isotropic and applying no phase difference to transmitted light, the second functional resin sub layer having a slow axis parallel to a transmission axis of the polarizer; and
the first functional resin sub layer serving as a retardation layer and applying a phase difference to transmitted light, the first functional resin sub layer having a slow axis forming an angle of about 68° relative to the transmission axis of the polarizer.
2. The liquid crystal display device according to claim 1 , the first functional resin sub layer being formed by polymerizing a polymerizable liquid crystal material in a liquid crystal phase, and the second functional resin sub layer being formed by polymerizing the polymerizable liquid crystal material in an isotropic phase.
3. The liquid crystal display device according to claim 1 , the first substrate including a first electrode and a second electrode at the liquid crystal layer side between which an electric field is generated to drive the liquid crystal layer, and the second substrate having the functional resin layer.
4. The liquid crystal display device according to claim 1 , the liquid crystal layer in the reflective display region giving a phase difference of about λ/4 to incident light in an inactive state.
5. An electronic apparatus comprising the liquid crystal display device as set forth in claim 1 .