Alps Electric Co., Ltd.

Chisso Corporation

Alps Electronic Co., Ltd.

Katsumasa Yoshii

Mitsuru Kano

Tatsuya Moriike

Kenji Omote

Tetsushi Tanada

Chie Chikira

Shigeru Sugimori

Hiroyuki Hebiguchi

Takashi Katoh

Yoshihiko Ishitaka

Yuzo Hayashi

Masahiko Yamaguchi

Yumiko Sato

Kinji Omote

A reflector is provided in a reflective or transmissive liquid crystal display device. In the reflector, when light is incident on the reflector in a first direction, a reflection characteristic profile of light reflected therefrom shows a reflectance distribution which is asymmetric with respect to a specular reflection angle of the incident light and shows a non-Gaussian distribution in which a maximum value of reflectance is within a reflection angle range smaller than the specular reflection angle of the incident light. In addition, when light is incident on the reflector in a second direction perpendicular to the first direction, a reflection characteristic profile of light reflected therefrom shows the non-Gaussian distribution, similar to the case in which the light is incident on the reflector in the first direction.

Reflector used in LCD devices having a plurality of convace portions each inner surface thereof having first and second flat surfaces perpendicular to respective first and second directions

The present invention provides a reflector having a light-diffusing property which suppresses inter-object reflection over a wide angle, and giving particularly high reflectance in an intended range of viewing angle; and to provide a reflection type liquid crystal display device using the same. The reflector includes a plurality of light-reflective concave portions. Each of the concave portions is formed so that an inclination angle (an angle between a plane tangential to a point on a concave surface and the surface of the base material) is maximum on a side portion of the curved surface, and so that the direction of the side portion having the maximum inclination angle is on a far side from a view point of an observer.

Reflector providing particularly high reflectance in an intended viewing angle and reflection type liquid crystal display device using the same

The present invention provides a reflector having a light-diffusing property which suppresses inter-object reflection over a wide angle, and giving particularly high reflectance in an intended range of viewing angle; and to provide a reflection type liquid crystal display device using the same. The reflector includes a plurality of light-reflective concave portions. Each of the concave portions is formed so that an inclination angle (an angle between a plane tangential to a point on a concave surface and the surface of the base material) is maximum on a side portion of the curved surface, and so that the direction of the side portion having the maximum inclination angle is on a far side from a view point of an observer. Moreover, the reflector includes many concave portions formed on a reflector surface, an inner surface of each of the concave portions-including a peripheral curved surface and a bottom curved surface that are continuously connected to each other, the peripheral curved surface being a part of a first sphere having a first radius, the bottom curved surface being a part of a second sphere having a second radius different from the first radius, and the bottom curved surface being located within the peripheral curved surface, wherein the first radius is smaller than the second radius, and a normal line extending from a center of the first sphere to the reflector surface and a normal line extending from a center of the second aphere to the reflector surface are not collinear. Further, the reflection type liquid crystal display device is provided with the reflector.

A reflector and a liquid crystal display device in which original reflection characteristics can be sufficiently accomplished and moir&#xe9; patterns can be prevented are provided. A reflectorformed with a plurality of concave portionson one surface of a base member along one arrangement direction is employed. When defining the section passing through the deepest point of the concave portion as a first section and defining the section perpendicular to the first section at the deepest point as a second section, the concave portionshave symmetrical shapes on the basis of the first section and have asymmetrical shapes on the basis of the second section. When defining the directions along the first section in the concave portionsas axis directions L, L, each of the axis directions L, Lare not parallel with the arrangement direction, and the axis directions L, Lare set to two or more directions.

Reflector comprising a plurality of concave portions and liquid crystal display device including the same

A reflector includes a reflection substrate and an optical diffusion layer deposited on the reflection substrate, which is provided with a plurality of reflection inclined planes continuously formed on a surface thereof with a stripe geometry in plan view and a surface of each refection inclined plane is an irregular irregular surface, and the optical diffusion layer is made of a matrix of a transparent resin or a transparent adhesive having fine particles dispersed therein so as to flatten the reflection substrate.

Reflector and liquid crystal display

In a concave portion of a reflector of a liquid crystal display, a shape of an opening surface is approximately elliptical. A straight line parallel to a first section line passing through a deepest point of the concave portion along a long axis of the elliptical shape is formed in a portion of the elliptical shape. The concave portion has an asymmetrical shape with respect to the first section which becomes wide from the first section line passing through the deepest point toward a depth direction and has a symmetrical shape with respect to the second section which becomes wide from the second section line perpendicular to the first section line toward the depth direction. A maximum angle of inclination of the second section is larger than a maximum angle of inclination of the first section.

Reflector and liquid crystal display device

An opening formed on a transflective film is close to the edge of a rectangular pixel region. An interval tbetween three sides of the four sides of the opening and the edge of the pixel region is smaller than the width of one concave portion formed on the transflective film thereby permitting the concave portions that contribute the least to reflection to be minimized, and the reflectance of the transflective film to be maximized. The desired reflection characteristic can be obtained using a predetermined number of concave portions.

Transflective film and liquid crystal display device

The present invention provides a reflector having a light-diffusing property which suppresses inter-object reflection over a wide angle, and giving particularly high reflectance in an intended range of viewing angle; and to provide a reflection type liquid crystal display device using the same. The reflector includes a plurality of light-reflective concave portions. Each of the concave portions is formed so that an inclination angle (an angle between a plane tangential to a point on a concave surface and the surface of the base material) is maximum on a side portion of the curved surface, and so that the direction of the side portion having the maximum inclination angle is on a far side from a view point of an observer. Moreover, the reflector includes many concave portions formed on a reflector surface, an inner surface of each of the concave portions including a peripheral curved surface and a bottom curved surface that are continuously connected to each other, the peripheral curved surface being a part of a first sphere having a first radius, the bottom curved surface being a part of a second sphere having a second radius different from the first radius, and the bottom curved surface being located within the peripheral curved surface, wherein the first radius is smaller than the second radius, and a normal line extending from a center of the first sphere to the reflector surface and a normal line extending from a center of the second sphere to the reflector surface are not collinear. Further, the reflection type liquid crystal display device is provided with the reflector.

A reflector having light diffusibility for suppressing a reflected image within a wide viewing angle range and having a particular brightness at a specific viewing angle range, and a reflective liquid crystal display device using the reflector, are provided. The reflectorcomprises a plurality of light-reflective concave portions, which are formed on a surface S of a substrate, wherein each of the concave portionsis formed with a first curved surface Alocated at one peripheral portion Sof the concave portionand a second curved surface Blocated at the other peripheral portion Sthereof, the deepest point Dis located on the first curved surface A, and the maximum value &#x3c3;bof the absolute value of the second curved surface Bto the surface S of the substrate is larger than that of the maximum value &#x3c3;aof the absolute value of the first curved surface Ato the surface S of the substrate.

An active matrix display device includes a pair of substrates, an optical modulation layer lying between the substrates, a plurality of pixel electrodes on one of the substrates, switching elements for driving the respective pixel electrodes provided in the vicinity of the pixel electrodes, and a reflective or transflective reflecting layerformed on at least one substrate more distant from a viewer side. The reflecting layer has asymmetrical reflection properties.

Active matrix display device with asymmetrical reflection, and insulating layer with a corrugated surface and a flat portion

A reflector for a liquid crystal display includes a substrate with light-reflective concave portions on the surface thereof. Each concave portion has a specific vertical section which passes through a deepest point of the concave portion. The internal shape of the specific vertical section is defined by a first curve, which extends from one point on the peripheral edge of the concave portion to the deepest point of the concave portion, and a second curve, which extends continuously from the first curve and from the deepest point of the concave portion to another point on the peripheral edge of the concave portion. The average of the absolute value of an inclination angle of the first curve relative to the substrate surface is larger than the average of the absolute value of an inclination angle of the second curve relative to the substrate surface.

Reflector which appears bright when viewed at specific angle and reflective liquid crystal display

A liquid crystal display device includes a reflector disposed at an outside surface side of one substrate of a liquid crystal cell or between the first substrate and an electrode disposed on an inside surface side of the first substrate. When an angle between a direction of a normal line with respect to a display surface of the liquid crystal display device and a main viewing direction is from about 0 degrees to about 20 degrees, a reflection ratio peak value of light incident upon the liquid crystal display device and reflected by the reflector is set so as to occur within a range of about 20 degrees from the normal line direction.

Liquid crystal display device with improved viewing angle properly and portable electronic apparatus using the same

In a liquid crystal display, first and second substrates are provided opposing each other with a liquid crystal layer held between them, the outer surface of the first substrate serves as a light scattering surface having a light scattering characteristic, and a reflector including an irregular reflection surface is provided on the light scattering surface so that the reflection surface is on the light scattering surface side.

LCD with irregular reflection surface reflector and light scattering element

Light-reflective concave portions are disposed on the surface of a substrate. The concave portions have a first and second vertical section perpendicular to each other. The first vertical section has an internal shape defined by a first curve and a second curve, the first curve extending from one point on the peripheral edge of the concave portion to the deepest point of the concave portion, and the second curve extending continuously from the first curve and from the deepest point of the concave portion to another point on the peripheral edge of the concave portion. The average of the absolute value of an inclination angle of the first curve is larger than that of the second curve relative to the substrate surface. The second vertical section has an internal shape defined by a shallow curve and deep curves formed at both sides of the shallow curve.

Growing community of inventors

Fukushima-ken, Japan

Katsumasa Yoshii