Sharp Kabushiki Kaisha Corporation

Shohei Katsuta

Tsuyoshi Maeda

Yasushi Asaoka

Tsuyoshi Kamada

Hideomi Yui

Emi Yamamoto

Seiji Ohhashi

Toru Kanno

Sho Ochi

Tetsuya Ide

Yuhsuke Tsuda

Satoshi Shibata

Kazuyoshi Sakuragi

Daisuke Shinozaki

Katsumi Kondoh

According to an aspect of the present invention, there is provided a light diffusion member which includes a light diffusion film, a polarizing film, and a retardation film. The light diffusion film includes a first substrate, a light diffusion portion, and a light shielding layer. The polarizing film includes a second substrate and a polarization layer. The retardation film includes a third substrate and a retardation layer. The retardation layer is formed from a birefringence body which has optically-negative uniaxiality. An alignment direction of the birefringence body is different in a thickness direction thereof. A slow axis of the retardation layer is positioned at azimuth between a transmission axis and an absorption axis of the polarization layer.

Light diffusion member, base material for light diffusion member production, display device using same and method for producing light diffusion member

Provided is a display device including a substrate that has light transmissivity, a plurality of light shielding layers that is formed at a recurring period on one face of the substrate, and a light-diffusing unit that is formed in an area of the one face of the substrate except for the area where the light shielding layers are formed, in which the light-diffusing unit includes a light emitting end face on the substrate side and includes a light incident end face having an area larger than the area of the light emitting end face on the side opposite to the substrate side, the height of the light-diffusing unit from the light incident end face to the light emitting end face is greater than the thickness of the light shielding layer, and the periodic direction at which the light shielding layers are recurrently formed is non-parallel to the direction of a pixel pitch of a display body.

Display device and light-diffusing member

A light-diffusion member () includes: a substrate () having light-transmitting properties; a light-diffusion portion () on a face of the substrate () facing a display medium (); and a light-blocking layer () on a part of the face of the substrate () facing the display medium () other than where the light-diffusion portion () is provided. The light-diffusion portion () includes: a light-emitting end face () in contact with the substrate (); and a light-incident end face () facing, and being larger in area than, the light-emitting end face (). The adhesive layer () adheres to light-incident end face () and partly () encroaches into a space () between the light-diffusion portion () and light-blocking layer ().

Display device, adhesive-layer-including light-diffusion member, and method of manufacturing the light-diffusion member

A liquid crystal display device according to one aspect of the present invention includes a liquid crystal panel of a vertical alignment mode, and an optical control member disposed on a light-exiting side of the liquid crystal panel. The liquid crystal panel includes a plurality of pixels having at least two domains (), in which directors of liquid crystal molecules are in a first direction. An absorption axis of a first polarizing sheet and an absorption axis of a second polarizing sheet are a mutually orthogonal and form angle that is approximately 45&#xb0;. The optical control member includes a base, a light diffusion part, a light blocking layer and a low refractive index part. A planar shape of the light blocking layer () when seen from a normal line direction of the base has a straight line part parallel to the absorption axis (P, P) of one of the first polarizing sheet and the second polarizing sheet and a straight line part forming an angle of less than 45&#xb0; with the absorption axis (P, P) of one polarizing sheet.

Liquid crystal display device, optical control member, and base material for manufacturing optical control member

A light-control member () includes a substrate (); light-shielding layers () provided in a first area (A) on one surface () of the substrate (); a light-diffusion section () provided in an area other than the light-shielding layers () in the first area (A) and formed of light transmitting material; and a support section() provided in a second area (A) positioned on an outer side of the first area (A) on the one surface (), in which the light-diffusion section () has a light emitting end surface () in contact with the one surface () of the substrate (), a light incident end surface () opposing the light emitting end surface () and having an area greater than an area of the light emitting end surface (), and a reflective surface () which is in contact with the light emitting end surface () and the light incident end surface () and on which light incident from the light incident end surface () is reflected, and a formation area of the support section () per unit area in the second area (A) is greater than a formation area of the support section () per unit area in the first area (A).

Mother substrate, light-control member, method for manufacturing light-control member, and display device

This light diffusion member includes: a substrate having light transmissivity; a plurality of light shielding layers formed on one face of the substrate; and light diffusion portions formed on the one face of the substrate at regions other than the regions where the light shielding layers have been formed. The light diffusion portions have a light-emitting end surface coming into contact with the substrate, a light incident end surface which faces the light-emitting end surface and has a larger area than the area of the light-emitting end surface, and a reflecting face coming into contact with the light-emitting end surface and the light incident end surface, and reflecting light entering from the light incident end surface. The height from the light incident end surface to the light-emitting end surface of the light diffusion portion is greater than the thickness of the light shielding layers. A scattering intensity at an azimuth &#x3d5;+&#x394;&#x3d5; and a scattering intensity at an azimuth &#x3d5;&#x2212;&#x394;&#x3d5; across a strong scattering azimuth &#x3d5;as a center axis are generally the same.

Light diffusion member and display device

This light-diffusing member includes a light-transmissive substrate, a plurality of wavelength-controlling layers formed on one surface of the light-transmissive substrate, and a light-diffusing portion formed on the one surface of the light-transmissive substrate in a region other than a region where the wavelength-controlling layers are formed. The light-diffusing portion includes a light-emitting end-surface that makes contact with the light-transmissive substrate and a light-incident end-surface that is opposite to the light-emitting end-surface and that has an area greater than an area of the light-emitting end-surface, and is made of a photosensitive resin; a height of the light-diffusing portion from the light-incident end-surface to the light-emitting end-surface is greater than a thickness of the wavelength-controlling layers; and the wavelength-controlling layers have characteristics that an optical absorptance at a first wavelength in a ultraviolet wavelength band is higher than an optical absorptance at a second wavelength in a visible-light wavelength band.

Light-diffusing member, method for manufacturing light-diffusing member, and display device

A liquid crystal display () includes a liquid crystal panel (), a backlight (), and a light-diffusing member (). There exist azimuths in which a transmittance of the liquid crystal panel () and a luminance of the backlight () are higher than a transmittance and a luminance in a direction of a normal. The azimuth in which the transmittance of the liquid crystal panel () is higher coincides with the azimuth in which the luminance of the backlight () is higher.

Liquid crystal display

A light diffusion member includes a substrate that has optical transparency, a light diffusion portion that is formed with a prescribed height on one surface of the substrate, a light shielding layer that is formed with a thickness less than the height of the light diffusion portion in another region of the one surface of the substrate than the light diffusion portion, and an antiglare layer that is formed on the other surface of the substrate. The light diffusion portion includes a light emission end surface that contacts with the substrate, a light incident end surface that faces the light emission end surface and has a larger area than an area of the light emission end surface, and a side surface that is formed between the light emission end surface and the light incident end surface, and the antiglare layer includes a binder layer and plural light diffusion particles that are dispersedly arranged in the binder layer.

Light diffusion member, method for manufacturing same, and display device

A liquid crystal display device includes: a liquid crystal panel; an illuminating device; and a light control member that is disposed on a light emission side of the liquid crystal panel. The light control member diffuses light that is emitted from the liquid crystal panel in an anisotropic manner in a first azimuth angle direction viewed from a normal direction of the liquid crystal panel to control an emission direction of the light. A pixel includes a first region in which a director of liquid crystal molecules is in a first direction, and a second region in which the director of the liquid crystal molecules is in a second orientation opposite to the first orientation in the first direction. A second azimuth angle direction in which light-diffusibility of the light control member is relatively strong, and the first direction approximately match each other.

Liquid crystal display device

Provided is a liquid crystal device including: a liquid crystal panel including a first substrate having a first vertical alignment film, a second substrate having a second vertical alignment film, a liquid crystal layer which is interposed between the first vertical alignment film and the second vertical alignment film and has a negative dielectric anisotropy, a first polarizing plate that is disposed on a light-incident side of the liquid crystal layer, and a second polarizing plate that is disposed on a light-emitting side of the liquid crystal layer; an illuminating device which is disposed on a light-incident side of the liquid crystal panel, and emits light toward the liquid crystal panel; and a light control member which is disposed on a light-emitting side of the liquid crystal panel, and diffuses light that is emitted from the liquid crystal panel in an azimuth angle direction and a polar angle direction viewed from a normal direction of the liquid crystal panel to control an emission direction of the light. The liquid crystal panel includes a plurality of pixels, each being a basic unit of display, and each of the pixels has a plurality of regions in which a director direction or an alignment of liquid crystal molecules at a central portion of the liquid crystal layer in a thickness direction during application of a voltage is different.

Liquid crystal display device having low viewing angle dependency

An inspection device of the present invention is provided with a light source unit which is disposed either one of a base material side and a light diffusing portion side and irradiates light toward a light-regulating film with respect to the light-regulating film which includes a base material, a light diffusing portion, and a light shielding layer, and a light receiver which is disposed on either the other of the base material side and the light diffusing portion side and measures an intensity of transmitted light which is emitted from the light source unit and is transmitted through the light-regulating film, and inspects a state of an inclined surface of the light diffusing portion based on a measurement result of the intensity of the transmitted light.

Inspection device for light-regulating film, and production device for light-regulating film

Provided is a liquid crystal display device in which grayscale inversion when viewing a liquid crystal panel in an oblique direction is suppressed, thereby being excellent in viewing angle characteristics. The liquid crystal display device includes a liquid crystal panel that includes a pair of substrates, a liquid crystal layer disposed between the pair of substrates, and a pair of polarization plates respectively arranged in the liquid crystal layer on a light incident side and a light emission side, an illumination device that is arranged on the light incident side of the liquid crystal panel and emits light toward the liquid crystal panel, and a light diffusion member that is arranged on the light emission side of the liquid crystal panel and causes light emitted from the liquid crystal panel to be diffused in an azimuthal direction viewed from a normal direction of the liquid crystal panel. When the total width of a polar angle when luminance is reduced to &#x2153; of the maximum luminance in characteristics of polar angle luminance of the illumination device is referred to as a &#x2153;-total width, the &#x2153;-total width of the illumination device is equal to or greater than 60&#xb0; in the azimuthal direction in which variations in luminance of the illumination device in a polar angle direction are the greatest.

A light diffusion member includes a substrate having light transmissivity, a plurality of light shielding layers, and light diffusion portions. The light diffusion portions have a light-emitting end surface, a light incident end surface which has a larger area than the area of the light-emitting end surface, and a reflecting face. Light which enters from the light incident end surface is anisotropically diffused in an azimuth direction seen from a normal direction of the substrate, and the height from the light incident end surface to the light-emitting end surface of the light diffusion portion is greater than the thickness of the light shielding layers. A hollow portion of the light diffusion portion is formed in the formation region of the light shielding layers, and air is present in the hollow portion.

Growing community of inventors

Osaka, Japan

Shohei Katsuta