Liquid crystal device and electronic apparatus
View Patent ↗Aspects of the invention provide a transflective liquid crystal display device that prevents display failure, such as an afterimage and unevenness like stains, and achieves a bright display with a wide viewing angle in both transmissive display and reflective display. The liquid crystal display device of the invention is a vertically-aligned transflective liquid crystal display device having a multigap structure. Each pixel can include, in a dot region, a plurality of islands, and connecting portions for electrically connecting the adjoining islands. Two islands, of the islands, can be disposed in a transmissive display region, and the remaining island is disposed in a reflective display region. A boundary sloping area in which the thickness of a liquid crystal layer continuously changes is disposed right below the connecting portion in the pixel electrode.
1. A liquid crystal display device, comprising:
a pair of substrates having a dot region, the dot region having a transmittance that is uniform regardless of the alignment direction of the liquid crystal molecules;
an electrode including, in the dot region, a plurality of islands and a connecting portion that electrically couples adjoining islands;
a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer containing liquid crystal that has a negative anisotropy;
an alignment control device being provided in planar regions of the islands to control an alignment state of the liquid crystal when a voltage is applied; and
a reflective film in the connecting portion.
2. A liquid crystal display device according to claim 1 , the dot region including a transmissive display region for transmissive display and a reflective display region for reflective display; and
a reflective film that scatters light being provided in the reflective display region.
3. A liquid crystal display device according to claim 2 , a thickness of the liquid crystal layer differs between the transmissive display region and the reflective display region.
4. The liquid crystal display device according to claim 1 , the alignment control device being provided at almost centers of the planar regions of the islands.
5. The liquid crystal display device according to claim 2 , a light-scattering device that scatters reflected light being provided on a side of the substrate having the reflective film, and the light scattering device being provided in a planar region of an island disposed in the reflective display region.
6. An electronic apparatus, comprising the liquid crystal display device according to claim 1 .
7. A liquid crystal display device comprising:
a pair of substrates;
a dot region having a transmittance that is uniform regardless of the alignment direction of the liquid crystal molecules and including a transmissive display region for transmissive display and a reflective display region for reflective display;
an electrode including, in the dot region, a first island in the transmissive display region, a second island in the reflective display region, and a connecting portion that electrically couples the first island and the second island;
a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer containing liquid crystal that has a negative anisotropy, a thickness of the liquid crystal layer differs between the transmissive display region and the reflective display region; and
a reflective film in the dot region except for the transmissive display region, a portion of the reflective film provided in the second island of the reflective display region scatters light, and a portion of the reflective film provided in the dot region except for the second island has a mirror-like surface.
8. A liquid crystal display device according to claim 7 , the reflective film being disposed in the connecting portion.
9. A liquid crystal display device according to claim 1 , the plurality of islands including a transmissive island and a reflective island, and
the reflective film having a first portion that is provided on the dot region of the transmissive island, the first portion having mirror-like surface, and a second portion that is provided on the dot region of the reflective island, the second portion having a non-reflective surface.
10. A liquid crystal display device according to claim 7 , the reflective film having a first portion that is provided on the dot region of the first island, the first portion having mirror-like surface, and a second portion that is provided on the dot region of the second island, the second portion having a non-reflective surface.
11. A liquid crystal display device according to claim 1 ,
the plurality of islands including a transmissive island and a reflective island, and
the connecting portion electrically coupling the transmissive island and the reflective island.
12. A liquid crystal display device, comprising:
a pair of substrates having a dot region;
an electrode including, in the dot region, a plurality of islands and a connecting portion that electrically couples adjoining islands, the connecting portion being formed narrower than the width of the islands and being formed in between the islands;
a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer containing liquid crystal that has a negative anisotropy;
an alignment control device being provided in planar regions of the islands to control an alignment state of the liquid crystal when a voltage is applied; and
a reflective film in the connecting portion.
13. A liquid crystal displays device comprising:
a pair of substrates;
a dot region including a transmissive display region for transmissive display and a reflective display region for reflective display;
an electrode including, in the dot region a first island in the transmissive display region, a second island in the reflective display region, and a connecting portion that electrically couples the first island and the second island, the connecting portion being formed narrower than the width of the first and second islands and being formed in between the first island and the second island;
a liquid crystal layer disposed between the pair of substrates, the liquid crystal layer containing liquid crystal that has a negative anisotropy, a thickness of the liquid crystal layer differing between the transmissive display region and the reflective display region; and
a reflective film provided in a portion of the dot region that is not the transmissive display region, wherein a portion of the reflective film that is provided in the second island, scatters light, and a portion of the reflective film that is not in the second island has a mirror-like surface.