Seiko Epson Corporation

Toshihiko Tsuchihashi

Chiyoaki Iijima

Tsuyoshi Maeda

Hiroshi Wada

Takeyoshi Ushiki

Seiichi Sakura

Yasuyuki Inoue

Yasushi Kasajima

Saori Eisaki

Chiyoaki Iljima

A display devicehas a display unitand a display switching unit. The display switching unitis provided with a reflective polarizing plate, a liquid crystal panel, and a polarizing platearranged in this order from the side of the display unitto the observation side. By controlling the liquid crystal panel, the display switching unit can be switched between a light transmissive state and a light reflective state. The display unitand the display switching unitare optically adhered to each other by an adhesive layer. Thus, deterioration of the contrast by boundary reflection can be restrained, and the flatness and the rigidity of the device can be improved.

Display device and electronic equipment having the same comprising a region for reflecting a polarized light and a region for absorbing the polarized light

A TN liquid crystal is used as a liquid crystal panel, and a polarizer is provided above the TN liquid crystal while a polarizer , a light scattering layer and a polarized light splitter are provided in this order under the TN liquid crystal . Furthermore, under the polarized light splitter , there is provided a light guide for introducing light of a light source from under the polarized light splitter and a reflecting plate . The polarized light splitter is a reflecting polarizer which can accomplish the effective utilization of light so that extremely bright reflective and transmissive displays are obtainable. Additionally, since a light diffusing layer is provided, even if the distance from the TN liquid crystal to the reflecting plate is prolonged, in the reflective display, no double image nor display bleeding occurs.

Display device, electronic apparatus using the same, and light guider for display devices

A retardation film and an upper polarized light separator are provided on the upper side of a liquid crystal cell . A diffuser , a lower polarized light separator , a color filter , a PET film and an Al deposited film are provided on the lower side of the liquid crystal cell . As the upper polarized light separator and the lower polarized light separator , a polarized light separator (reflective polarizer) is used, which reflects linearly-polarized light in one direction as linearly-polarized light in the one direction, and transmits linearly-polarized light in another direction perpendicular to the one direction as linearly-polarized light in the other direction. The light emitted from LED is introduced into a light guide plate between the upper polarized light separator and the retardation film through a light guide . Then the light is emitted from the lower side of the light guide plate to the liquid crystal cell

Display device and electronic apparatus using the same

An upper polarized-light separator is provided on a STN liquid crystal to provide a display device using a polarization-changing optical element. A light source is provided between the upper polarized-light separator and the STN liquid crystal. Plane-polarized light parallel to the drawing passes through the upper polarized-light separator. Plane-polarized light perpendicular to the drawing is reflected by the upper polarized-light separator, goes towards the interior of the liquid crystal display device, and passes through the upper polarized-light separator to be emitted towards the observation side after repeated reflection in the liquid crystal display device, resulting in a brighter display.

Display device with liquid crystal between reflective polarizers, and a light source illuminating between the polazers

A display device capable of obtaining a bright display is provided. A polarizer is arranged above an TN liquid crystal, a light-scattering layer, a polarized light separator, a coloring layer, and a reflecting plate are arranged under the TN liquid crystal. The polarized light separator transmits a linearly polarized light component of a second direction of light being incident from the upper side, reflects a linearly polarized light component of a third direction perpendicular to the second direction, and can upwardly emit linearly polarized light of the second direction in response to light being incident from the lower side. In a voltage non-applied portion, light reflected by the polarized light separator becomes white emission light. In a voltage applied portion, light transmitted through the polarized light separator is colored by the coloring layer to be color emission light.

Display device and electronic apparatus using the same having a reflective polarizer between LCD and optical element which emits light responsive to light from polarizer

A display device is provided which produces a bright display and prevents parallax. Aluminum electrodes, color filters, a polarized light separator and a diffusion layer are provided in this order between a glass substrate and a STN liquid crystal inward of the glass substrate. A polarized light separator is used in which, of the light incident on the STN liquid crystal 50 side, a linearly-polarized light component in a predetermined second direction is transmitted as linearly-polarized light in the second direction, and a linearly-polarized light component in a third direction perpendicular to the predetermined second direction is reflected, and the light incident on a same side as the aluminum electrodes is emitted as linearly-polarized light in the second direction to a same side as the STN liquid crystal.

Growing community of inventors

Matsumoto, Japan

Toshihiko Tsuchihashi