Abstract: 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.

Abstract: A solder alloy, a solder paste, a solder ball, a solder preform, a solder joint, a vehicle-mounted electronic circuit, an ECU electronic circuit, a vehicle-mounted electronic circuit device, and an ECU electronic circuit device which have a liquidus-line temperature and a solidus-line temperature falling within predetermined temperature ranges, and have excellent heat conductivity, and excellent heat cycle resistance. The solder alloy has an alloy composition of, by mass %, Ag: 3.0 to 3.8%, Cu: 0.1 to 1.0%, Bi: 1.1% or more and less than 1.5%, Sb: 1.0 to 7.9%, Fe: 0.020 to 0.040%, Co: 0.001 to 0.020%, with the balance being Sn. The solder alloy may further contain, by mass %, at least one of Ge, Ga, As, Pd, Mn, In, Zn, Zr, and Mg: 0.1% or less in total.

Abstract: A solder alloy, a solder paste, a solder ball, a solder preform, a solder joint, a vehicle-mounted electronic circuit, an ECU electronic circuit, a vehicle-mounted electronic circuit device, and an ECU electronic circuit device which have a liquidus-line temperature and a solidus-line temperature falling within predetermined temperature ranges, and have excellent heat conductivity and excellent heat cycle resistance. The solder alloy has an alloy composition of, by mass %, Ag: 3.0 to 3.8%, Cu: 0.1 to 1.0%, Bi: more than 0% and 0.9% or less, Sb: 1.0 to 7.9%, Fe: 0.020 to 0.040%, Co: 0.001 to 0.020%, with the balance being Sn. The solder alloy may further contain, by mass %, at least one of Ge, Ga, As, Pd, Mn, In, Zn, Zr, and Mg: 0.1% or less in total.

Abstract: A solder alloy, a solder paste, a solder ball, a solder preform, a solder joint, a vehicle-mounted electronic circuit, an ECU electronic circuit, a vehicle-mounted electronic circuit device, and an ECU electronic circuit device which have a liquidus-line temperature and a solidus-line temperature falling within predetermined temperature ranges, and have excellent heat conductivity, and excellent heat cycle resistance. The solder alloy has an alloy composition of, by mass %, Ag: 3.0 to 3.8%, Cu: 0.1 to 1.0%, Bi: more than 0% and less than 1.5%, Sb: 1.0 to 7.9%, Fe: 0.020 to 0.040%, Co: more than 0.008% and 0.020% or less, with the balance being Sn. The solder alloy may further contain, by mass %, at least one of Ge, Ga, As, Pd, Mn, In, Zn, Zr, and Mg: 0.1% or less in total.

Abstract: A lightguide component for light emission devices has a first principal face and a second principal face at an opposite side from the first principal face. The lightguide component for light emission devices includes: a lightguide layer including a light-receiving portion to receive light emitted from a light source, a third principal face at the first principal face side, and a fourth principal face at the second principal face side; and a light distribution controlling structure having a plurality of internal spaces, the plurality of internal spaces creating interfaces to direct a portion of the light propagating in the lightguide layer toward the first principal face via total internal reflection. In a plan view a first region in which the light distribution controlling structure is present and a second region in which the light distribution controlling structure is not present are disposed so as to define a predetermined design.

Abstract: 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.

Abstract: The present invention provides an optical laminate including a void-containing layer in which a pressure-sensitive adhesive, an adhesive, and the like barely permeate a void. In order to achieve the object, an optical laminate (10a) or (10b) of the present invention includes a void-containing layer (12) and a low moisture permeable layer (13) formed on the void-containing layer (12), wherein the low moisture permeable layer (13) includes at least one element selected from the group consisting of metal, metal oxide, silicon, silicon oxide and an organic-inorganic hybrid material, and a moisture vapor transmission rate of the low moisture permeable layer (13) measured by a dish method defined in JIS Z 0208-1976 is 35 g/m2·day or less.

Abstract: The present invention provides an optical laminate including a void-containing layer with high strength against peeling, a method for producing the optical laminate, an optical member including the optical laminate, an optical apparatus including the optical laminate, a method for producing the optical member, and a method for producing the optical apparatus. The optical laminate (10a) or (10b) of the present inventions includes: a void-containing layer (12); and a hard layer (13) formed on the void-containing layer (12), wherein the void-containing layer (12) has a void fraction of 30 vol % or more, the hard layer (13) includes at least one element selected from the group consisting of metal, metal oxide, silicon, silicon oxide and an organic-inorganic hybrid material, and hardness measured by pushing an indenter of a nano indenter into the hard layer (13) for 20 nm is larger than hardness of the void-containing layer (12).

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An optical member that functions as an optical coupling layer has a first layer having a porous structure, and a second layer contacting a first main surface of the first layer. The second layer includes a resin composition, and has a transmittance of 5% to 85% with regard to a first light that is within the wavelength range of greater than 800 nm and less than or equal to 2000 nm. The first layer includes a first region having the porous structure, and a second region in which pores of the porous structure are filled with a resin composition.

Abstract: 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 1.0×105 (Pa) to 1.0×107 (Pa); the second pressure-sensitive adhesive layer has a storage modulus of elasticity at 23° C. of 1.0×105 (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.

Abstract: An angle at which an intensity becomes maximum in a light distribution of light emitted from a center of a light emitting surface of a surface illumination device is in a range of ?90° or more to less than 0° in a plane including a vertical axis and perpendicular to the light emitting surface, in a case where an axis passing through the center of the light emitting surface and perpendicular to the floor surface is defined as the vertical axis, and in the plane, a direction extending from the center of the light emitting surface toward the floor surface is defined as ?90°, a direction extending from the center of the light emitting surface toward a side opposite to the floor surface is defined as +90°, and a direction orthogonal to the light emitting surface is defined as vertical 0°.

Abstract: 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.

Abstract: A lightguide component for illumination devices includes: a lightguide layer having a first principal face, a second principal face at an opposite side from the first principal face, and a light-receiving side face to receive light emitted from a light source; a first low-refractive index layer (20A) that is disposed at the first principal face side of the lightguide layer, the first low-refractive index layer having a refractive index nL1 which is smaller than a refractive index nGP of the lightguide layer; and a light distribution controlling structure (14A, 14B) capable of at least directing a portion of light propagating in the lightguide layer toward the first low-refractive index layer or in an opposite direction from the first low-refractive index layer. The lightguide component has a visible light transmittance of 60% or more, and a haze value of less than 10%.

Abstract: 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.