Sharp Kabushiki Kaisha Corporation

Nitto-denko Corporation

Hitachi Chemical Company, Ltd.

Takahiro Yoshikawa

Daisuke Hattori

Ryota Morishima

Atsushi Kishi

Kozo Nakamura

Yufeng Weng

Yasumori Kuromizu

Toshio Takizawa

Takashi Shinoda

Munehiro Oota

Kaori Yamamoto

Shigeru Yoshikawa

Takaaki Tanaka

Shuki Yamamoto

Takaaki Matsumoto

Shimpei Mukadeyama

An optical laminate includes: a low-refractive index layer; a first pressure-sensitive adhesive layer arranged adjacent to the low-refractive index layer; and a second pressure-sensitive adhesive layer serving as one outermost layer. The low-refractive index layer has a porosity of 40 vol % or more; the first pressure-sensitive adhesive layer has a storage modulus of elasticity at 23° C. of from 1.0×10(Pa) to 1.0×10(Pa); the second pressure-sensitive adhesive layer has a storage modulus of elasticity at 23° C. of 1.0×10(Pa) or less; a ratio of a thickness of the low-refractive index layer to a total thickness of the pressure-sensitive adhesive layers present in the optical laminate with pressure-sensitive adhesive layers on both surfaces is from 0.10% to 5.00%; and, when the second pressure-sensitive adhesive layer is arranged outside the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer is free from being arranged adjacent to the first pressure-sensitive adhesive layer.

Optical laminate with double-sided adhesive layer, and optical device

A lightguide component for illumination devices having an exit surface includes: a lightguide layer having a light-receiving portion to receive light emitted from a light source, a first principal face at the exit surface side, and a second principal face at an opposite side from the first principal face; a light distribution controlling structure having a plurality of internal spaces, each of the plurality of internal spaces including a first slope to direct a portion of light propagating in the lightguide layer toward the exit surface via total internal reflection, and a second slope at an opposite side from the first slope, wherein, when viewed from a normal direction of the first principal face of the lightguide layer, the first slope presents a curved surface that is convex toward the light source; and an anti-reflection layer and/or anti-glare layer disposed at the first principal face side of the lightguide layer.

Light guide member for lighting device and lighting device

A backlight unit includes: a light source; a light guide plate arranged to face the light source, having an end surface that light from the light source enters; and an emitting surface from which the entered light is emitted; a reflective plate bonded to a back surface side of the light guide plate via a double-sided pressure-sensitive adhesive film; and a casing having a front portion and a back portion, the casing configured to store the light source, the light guide plate, and the reflective plate. The backlight unit is configured so that light from the light source is free from entering a space between the low-refractive index layer and the reflective plate, or so that light that has entered the space between the low-refractive index layer and the reflective plate from a light source is free from being emitted from the emitting surface of the light guide plate.

Backlight unit and image display device

A lighting device that can ensure task productivity while reducing the glare is provided herein. The lighting device has a light source; and a light guiding part including a light guiding panel and configured to guide light that is emitted from the light source. The light guiding panel includes: a light incident end surface that is situated facing the light source, the light incident end surface being a surface on which the light emitted from the light source is incident; a first light emitting part that is included in an opposite end from the light incident end surface, and that emits the light guided inside the light guiding panel; and a second light emitting part that is included in a predetermined main surface of the light guiding panel that intersects with the light incident end surface, and that emits the light guided inside the light guiding panel.

Lighting device

A backlight unit includes: a light source; a light guide plate having an end surface that is arranged to face the light source, and that light from the light source enters, and an emitting surface from which the entered light is emitted; a casing having a front portion and a back portion, the casing being configured to store the light source and the light guide plate; and an optical pressure-sensitive adhesive film arranged between the front portion of the casing on a light source side and the light guide plate, the optical pressure-sensitive adhesive film being bonded to the light guide plate. The optical pressure-sensitive adhesive film includes a light-absorbing layer, a substrate, a low-refractive index layer, and a pressure-sensitive adhesive layer in the stated order from a front portion side of the casing.

Provided is an optical member, which is suppressed from causing a reduction in display quality due to wear or a flaw resulting from its vibration while maintaining the excellent characteristics of its low-refractive index layer. The optical member includes: a light guide plate having an end surface that light from a light source enters and an emitting surface from which the entered light is emitted; and a reflective plate bonded to a side of the light guide plate opposite to the emitting surface via a double-sided pressure-sensitive adhesive film. The double-sided pressure-sensitive adhesive film includes a first pressure-sensitive adhesive layer, a low-refractive index layer, and a second pressure-sensitive adhesive layer from the light guide plate side. The optical member further includes a surface-treated layer formed on a side of the reflective plate opposite to the double-sided pressure-sensitive adhesive film.

Optical member, and backlight unit and image display device using said optical member

There is provided an optical member that can achieve a backlight unit excellent in brightness uniformity. The optical member includes: a light guide plate having an end surface that light from a light source enters, an emitting surface from which the entered light is emitted, and a light extraction pattern arranged on a surface opposite to the emitting surface; and a reflective plate bonded to the light guide plate via a double-sided pressure-sensitive adhesive film. An outer edge of the light guide plate is positioned outside an outer edge of the double-sided pressure-sensitive adhesive film, and the outer edge of the double-sided pressure-sensitive adhesive film is positioned outside an outer edge of the light extraction pattern.

Optical member and backlight unit using said optical member, and image display device

A desktop illumination device includes a light source; and a light guide including a light guide plate. The light guide plate has a light incident surface and first and second main surfaces. An angle at which an intensity becomes maximum in a light distribution of light emitted from the first main surface is in a range of −90° or more to less than 0°, in a case where an axis passing through a center of the first main surface and perpendicular to an installation surface is defined as a vertical axis, and in a plane including the vertical axis and perpendicular to the installation surface, a direction parallel to the installation surface is defined as vertical 0°, an upward angle with respect to the vertical 0° is defined as a positive angle, and a downward angle with respect to the vertical 0° is defined as a negative angle.

Desktop illumination device

Provided is a lighting apparatus having high light entrance efficiency with respect to a light guide plate, and being excellent in tint of light emitted from the light guide plate. The lighting apparatus of the present invention includes: an LED package; a light guide plate, which includes a main surface serving as a light emission surface, and a side surface serving as a light entrance surface, and which is arranged so that the side surface is opposed to the LED package; and a low-refractive index layer arranged between the LED package and the light guide plate.

Illumination device

The present invention provides an optical sheet for a light guide plate type liquid crystal display, including a low refractive index layer having an extremely low refractive index. The optical sheet Afor a light guide plate type liquid crystal display () according to the present invention includes a first optical film (light guide plate) (), a low refractive index layer (), and a second optical film (reflection plate) () laminated in this order, and the low refractive index layer () has a refractive index of 1.25 or less.

Optical sheet for light guide plate type liquid crystal display, backlight unit for light guide plate type liquid crystal display, and light guide plate type liquid crystal display

Provided is a polishing liquid including cerium oxide particles, an organic acid A, a polymer compound B having a carboxyl acid group or a carboxylate group, and water, wherein the organic acid A has at least one group selected from the group consisting of &#x2014;COOM group, -Ph-OM group, &#x2014;SOM group and &#x2014;POMgroup, pKa of the organic acid A is less than 9, a content of the organic acid A is 0.001 to 1 mass % with respect to the total mass of the polishing liquid, and a content of the polymer compound B is 0.01 to 0.50 mass % with respect to the total mass of the polishing liquid, and pH is in the range of 4.0 to 7.0.

Polishing liquid and method for polishing substrate using the polishing liquid

In order to provide a display device which includes a touch panel and enable to (i) maintain flatness of a display surface, (ii) increase productivity, and (iii) reduce variations caused during the manufacturing process, provided is a display device () including: a display panel (); a touch panel () provided on an observer side of the display panel (); and a single holding frame () surrounding a side surface of each of the display panel () and the touch panel (), each of the display panel () and the touch panel () being held by the single holding frame.

Display device with touch panel

It is an object of the present invention to achieve cost reduction or the like in a lighting device. A backlight unitaccording to the present invention includes: LEDsas a plurality of light sources; at least two LED boardson which the LEDsare mounted; a chassisin which the at least two LED boardsare housed; and a connecting and retaining member. The at least two LED boardsinclude ones arranged adjacent to each other. The adjacent LED boardsare electrically connected to each other and retained on the chassisby the connecting and retaining member

Lighting device, display device and television receiver

A lighting device maintains an optical design and absorbs expansion of a light guide plate with a simple structure if the light guide plate expands toward a light source side. A backlight unitincludes an LED board; an LED light sourcesarranged on the LED board; a light guide platehaving a flat plate shape and including light entrance surfacesandon side surfaces that are provided on opposite sides, the light entrance surfacesandbeing arranged to face the LED light sourcesof the LED board; and spacer members() regulating a distance Wbetween the LED boardand the light guide plate. Each spacer member() has a Young's modulus smaller than that of the light guide plate. Each spacer member() regulates the distance Wbetween the LED light sourcesand the light guide plateand absorbs the expansion of the light guide plate

Lighting device, display device, and television receiver

A backlight unitaccording to the present invention includes LEDsas light sources, an LED boardmounting the LEDsthereon, a chassisthat stores the LED boardtherein and includes an attachment hole, a body portionthat sandwiches the LED boardbetween the body portionand the chassisand holds the LED board, and a board holding memberincluding an attachment portionthat is protruded from the body portiontoward the chassisto be inserted into the attachment hole, and the board holding memberis configured to be rotatable along a plate surface of the chassisbetween a holding position at which the attachment portionoverlaps with an edge of the attachment holein a plan view and sandwiches the edge of the attachment holebetween the attachment portionand the body portionand a non-holding position at which the attachment portiondoes not overlap with the edge of the attachment holein a plan view and attaching and detaching of the attachment portionfrom the attachment holeis allowed.

Growing community of inventors

Osaka, Japan

Takahiro Yoshikawa