Seiko Epson Corporation

Takenori Hirota

Tomokazu Umeno

Shohei Yoshida

Ryuichi Kurosawa

Naoki Tomikawa

Masakazu Nishida

Akinori Masuzawa

In a projection type display apparatus, a lighting device includes two reflection type cutoff filters (first cutoff filter and reflective second cutoff filter) which block out ultraviolet range light on an output optical path from a light source. A cut on wavelength of the second cutoff filter on the front side is longer than that of the first cutoff filter on the rear side. The two cutoff filters are formed on planar-shaped first faces of a first integrator lens and a second integrator lens. For this reason, both input faces of the two cutoff filters are orthogonal to an apparatus optical axis.

Projection type display apparatus and lighting device

In a liquid crystal device according to the invention, a pre-tilt angle of a liquid crystal layer is greater on an opposing electrode side than on a pixel electrode side. A high potential and a low potential relative to an opposing electrode potential are alternately applied to pixel electrodes through switching elements; and the opposing electrode potential is higher than a standard potential, the standard potential being a potential in which the average potential between the high potential and the low potential has been shifted by an amount equivalent to the average value of the amount of change in the potential of the pixel electrodes caused by parasitic capacitance in the switching elements when the high potential is applied to the pixel electrodes and the amount of change in the potential of the pixel electrodes caused by parasitic capacitance when the low potential is applied to the pixel electrodes.

Liquid crystal device, liquid crystal device driving method, and electronic apparatus

A liquid crystal display device includes a device substrate that includes a pixel electrode, a counter substrate that is formed opposite the device substrate and that includes a counter electrode, a liquid crystal layer that is formed between the device substrate and the counter substrate, a first alignment layer that is formed on a side of the device substrate which is closer to the liquid crystal layer, and a second alignment layer that is formed on a side of the counter substrate which is closer to the liquid crystal layer. The pixel electrode is made of a material having a work function smaller than that of a material for the counter electrode. The first alignment layer has substantially the same density as that of the second alignment layer, and the thickness dof the first alignment layer is greater than the thickness dof the second alignment layer.

Growing community of inventors

Suwa, Japan

Takenori Hirota