Abstract: A display device 100 has a display unit 110 and a display switching unit 120. The display switching unit 120 is provided with a reflective polarizing plate 121, a liquid crystal panel 122, and a polarizing plate 123 arranged in this order from the side of the display unit 110 to the observation side. By controlling the liquid crystal panel 122, the display switching unit can be switched between a light transmissive state and a light reflective state. The display unit 110 and the display switching unit 120 are optically adhered to each other by an adhesive layer 131. Thus, deterioration of the contrast by boundary reflection can be restrained, and the flatness and the rigidity of the device can be improved.

Abstract: A display device 100 has a display unit 110 and a display switching unit 120. The display switching unit 120 is provided with a reflective polarizing plate 121, a liquid crystal panel 122, and a polarizing plate 123 arranged in this order from the side of the display unit 110 to the observation side. By controlling the liquid crystal panel 122, the display switching unit can be switched between a light transmissive state and a light reflective state. The display unit 110 and the display switching unit 120 are optically adhered to each other by an adhesive layer 131. Thus, deterioration of the contrast by boundary reflection can be restrained, and the flatness and the rigidity of the device can be improved.

Abstract: A TN liquid crystal 140 is used as a liquid crystal panel, and a polarizer 130 is provided above the TN liquid crystal 140 while a polarizer 135, a light scattering layer 150 and a polarized light splitter 160 are provided in this order under the TN liquid crystal 140. Furthermore, under the polarized light splitter 160, there is provided a light guide 190 for introducing light of a light source 191 from under the polarized light splitter 160 and a reflecting plate 200. The polarized light splitter 160 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 150 is provided, even if the distance from the TN liquid crystal 140 to the reflecting plate 200 is prolonged, in the reflective display, no double image nor display bleeding occurs.

Abstract: A TN liquid crystal 140 is used as a liquid crystal panel, and a polarizer 130 is provided above the TN liquid crystal 140 while a polarizer 135, a light scattering layer 150 and a polarized light splitter 160 are provided in this order under the TN liquid crystal 140. Furthermore, under the polarized light splitter 160, there is provided a light guide 190 for introducing light of a light source 191 from under the polarized light splitter 160 and a reflecting plate 200. The polarized light splitter 160 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 150 is provided, even if the distance from the TN liquid crystal 140 to the reflecting plate 200 is prolonged, in the reflective display, no double image nor display bleeding occurs.

Abstract: A retardation film 30 and an upper polarized light separator 20 are provided on the upper side of a liquid crystal cell 10. A diffuser 40, a lower polarized light separator 50, a color filter 60, a PET film 70 and an Al deposited film 80 are provided on the lower side of the liquid crystal cell 10. As the upper polarized light separator 20 and the lower polarized light separator 50, 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 120 is introduced into a light guide plate 130 between the upper polarized light separator 20 and the retardation film 30 through a light guide 110. Then the light is emitted from the lower side of the light guide plate 130 to the liquid crystal cell 10.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: This invention refers to a liquid crystal device that provides a color display by utilizing a colorization phenomenon caused by double refraction birefringence of a liquid crystal, wherein the color tone that appears when no voltage or a non-selected voltage is applied is white or a non-color close thereto, and at least two colors are displayed when a voltage is applied, and electronic equipment in which this liquid crystal device is installed.A liquid crystal device which is capable of displaying colors without using color filters and which is also capable of displaying white or a non-color close thereto is implemented by optimizing the value of .DELTA.n.multidot.d of the liquid crystal and the relationship between the value of .DELTA.n.multidot.d of the liquid crystal and the value of retardation (R) of an optically anisotropic substance such as a retardation film.In other words, the liquid crystal cell and the optically anisotropic substance should be such as to satisfy the following relationships:.DELTA.