Sony Corporation

Shigehiro Yamakita

Shogo Shinkai

Eiji Ohta

Yasuyuki Kudo

Taku Ishimori

Toru Abiko

Makoto Aoki

Masayasu Kakinuma

Ken Hosoya

Mitsunari Hoshi

Hirokazu Odagiri

Yutaka Muramoto

An optical element covering member includes one or more optical elements, a support medium for supporting the one or more optical elements, and a covering member for covering the one or more optical elements and the support medium. At least one out of the one or more optical elements is a reflective polarizer, and the covering member has at least a region, through which the light inputted from a light source is emitted to a liquid crystal panel, the region having a phase difference lag of not more than 1/50 &#x3c0; of a measured wavelength, with respect to an optical axis of the reflective polarizer.

Optical element covering member, backlight and liquid crystal display

An illuminating device capable of decreasing not only in-plane luminance unevenness in the front face direction but also in-plane luminance unevenness when viewed from a diagonal direction is provided. Where an occupancy ratio of a return light generation section in which light from respective linear light sources vertically entering a light incident surface of an optical sheet is entirely reflected by a surface of a convex section and return light oriented toward a reflecting plate is generated out of a first region Rwhen the optical sheet is viewed from the normal line direction of a face is K; and where an occupancy ratio of a return light generation section in which light from the respective linear light sources vertically entering the light incident surface of the optical sheet is entirely reflected by a surface of convex sections and return light oriented toward the reflecting plate is generated out of a second region when the optical sheet is viewed from the normal line direction of the face is K, and Kis larger than K

Illuminating device and display unit

An illuminating apparatus is provided and includes a plurality of point light sources in one plane and a first optical sheet and a second optical sheet overlapped in a region facing the plurality of point light sources. The plurality of point light sources are arranged in a first direction and also arranged in a second direction orthogonal to the first direction. The first optical sheet has a plurality of first three-dimensional structures extending in a direction parallel to the first direction and arranged in a direction parallel to the second direction. The second optical sheet has a plurality of second three-dimensional structures extending in a direction parallel to the second direction and arranged in a direction parallel to the first direction. Each of the second three-dimensional structures has a shape which generates a larger amount of return light from normal incident light as compared with the first three-dimensional structures.

Illuminating apparatus and display apparatus

There is provided an optical sheet stack which includes a first optical sheet having a large number of irregularities consecutively arranged on one surface thereof, and a second optical sheet stacked thereon. In the optical sheet stack, the second optical sheet has, on a bonding surface thereof, an adhesive layer bonded with apexes of the irregularities, and while assuming pitch of arrangement of the irregularities as P, and width of bonding of each apex of the irregularities bonded to the adhesive layer as Pw, the relation of 0&#x3c;Pw/P&#x2266;0.2 is satisfied.

Optical sheet stack and liquid crystal display device

The optical sheet includes a first lens sheet having a plurality of first three-dimensional structures arrayed to extend to one surface thereof, and a reflective polarizer sheet for transmitting either one of p-polarization component and s-polarization component of incident light and reflecting the other of p-polarization component and s-polarization component of the incident light. Head portions of the first three-dimensional structures are bonded to the reflective polarizer sheet.

Optical sheet having bonded prism and polarizer sheets and display device

An optical element covering member is provided which can suppress degradation in display performance caused by warping and undulation. The optical element covering member includes at least one optical element, a support medium supporting the optical element; and a covering member covering the optical element and the support medium. In the above optical element covering member, the covering member has a Vicat softening point of more than 85&#xb0; C., and at least one surface of the covering member, which covers the support medium, has a coefficient of thermal expansion in the range of 85% to 160% of the coefficient of thermal expansion of the support medium.

Optical element covering member, backlight, and liquid crystal display device

Using a distance L between the centers of light sources; a refractive index n of an optical element; a thickness d of the optical element; a distance W from the center of the light source to the optical element; a refractive index nof air; an angle of incidence &#x3b8;of light emitted from the light sources and coming into the optical element, relative to the direction of optical axes; an angle of refraction &#x3b8;of light, incident on the optical element, in the optical element; a diameter of each light source as D; and a maximum tangential angle a formed between a tangential line in contact with an outer surface of a luminance distribution generating layerand a plane orthogonal to the optical axes, there is included a maximum tangential angle a satisfying x&#x3e;L/2&#x2212;D/2 when calculating a travel range x of a split image of the light sources in a direction normal to the optical axes using (1) nsin(a)=n sin(a&#x2212;&#x3b8;), (2) nsin &#x3b8;=n sin &#x3b8;and (3) x=W tan &#x3b8;+d tan &#x3b8;. This facilitates uniformalizing of front luminance distribution.

Surface emission device, optical element and liquid crystal display device

An optical element covering member includes: at least one optical element; a support medium supporting the at least one optical element; and a shrinkable covering member covering the at least one optical element and the support medium. In the optical element covering member, among sides forming primary surfaces of the support medium, at least one set of sides facing each other is covered with the covering member, and the following equation (1) is satisfied under conditions at a temperature of 70&#xb0; C.,0&#x2266;&#x2266;1.65&#xd7;10&#x2003;&#x2003;(1)where t indicates the thickness of the support medium, L indicates the length of the side of the support medium covered with the covering member, F indicates a tensile force of the covering member, which acts in a direction parallel to the side having the length L.

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Miyagi, Japan

Shigehiro Yamakita