Abstract: Provided is a light emitting diode (LED) substrate. The LED substrate includes a substrate of a rectangular shape having sides in a first direction and a second direction, a plurality of LED devices placed on a surface of the substrate, and a plurality of conducting member which electrically connects the plurality of LED devices on the surface of the substrate and forms 2n circuits independent from each other in the first direction. Each circuit has a first electrode part and a second electrode part. The first electrode part receives input of an electric current from the outside, the second electrode part outputs an electric current to the outside, and the first electrode part and the second electrode part face each other in the second direction, and are alternately placed in the first direction to be point-symmetrical with respect to a center of the substrate as a symmetry point.

Abstract: The light illumination module includes a substrate, a plurality of wiring patterns formed in parallel on the substrate, and a plurality of LED devices disposed on the wiring patterns. Each wiring pattern has a stripe-shaped portion extending in a first direction, a first protrusion portion protruding in a second direction, and a second protrusion portion protruding in an opposite direction. The first and second protrusion portions are formed in an alternating manner along the first direction, and the LED devices are disposed on the first protrusion portion and the stripe-shaped portion at a location corresponding to the second protrusion portion. A first electrode of each LED device is electrically connected to the first protrusion portion or the stripe-shaped portion immediately below, and a second electrode of each LED device is electrically connected to the stripe-shaped portion or the second protrusion portion of an adjacent wiring pattern with a wire.

Abstract: Provided is a small-sized circuit board fixing structure capable of enabling a circuit board on a base to be easily replaced. A circuit board fixing structure configured to fix a circuit board onto a surface of a base includes a wire pattern formed on a surface of the circuit board, a first through hole penetrating from a front surface to a rear surface of the circuit board, a second through hole penetrating from a front surface to a rear surface of the base so as to communicate with the first through hole, an electrode penetratively inserted into the second through hole, and a fixing member engaged with the electrode mounted on the surface of the circuit board and configured to fix the circuit board to the base, in which when the fixing member and the electrode are engaged, the wire pattern and the electrode are electrically connected through the fixing member.

Abstract: Provided is a heat dissipation device capable of uniformly cooling an entire base plate (support member) without generating stress in a heat pipe. A heat dissipation device configured to dissipate heat of a heat source into the air, the heat dissipation device including: a support member disposed such that a side of a first principal surface is in close contact with a heat source; a heat pipe thermally joined to a second principal surface of the support member and configured to transport the heat from the heat source; and multiple heat radiation fins disposed in a space adjoining the second principal surface, thermally joined to the heat pipe, and configured to dissipate the heat transported by the heat pipe, in which the respective heat radiation fins are directly joined to the second principal surface in a region other than a region in which the heat pipe is mounted.

Abstract: Provided is a light guide plate for an image display device which uses lead-free glass, has excellent color reproducibility and a light weight, and may obtain a wide viewing angle. A light guide plate for an image display device, which guides image light inputted from an image display element and outputs the image light toward a user's pupil, is configured to be made of lead-free glass having a refractive index of 1.8 or more with respect to a wavelength of the image light, and to have internal transmittance of 0.6 or more with respect to a wavelength of 400 nm when a plate thickness is 10 mm.

Abstract: Provided is a circuit board supporting structure capable of easily detaching a circuit board on a base. The circuit board supporting structure is configured to support a circuit board on a base, in which the base has a concave portion formed in a placement surface of the circuit board, and a rotational operation member configured to be rotatably accommodated in the concave portion and extend and retract in a direction perpendicular to the placement surface by a rotational operation, in which the circuit board has a through hole formed at a position corresponding to the concave portion, in which the rotational operation member has a reference surface formed approximately in parallel with the placement surface, and an operation portion formed on a rotational axis of the rotational operation member so as to be exposed from the through hole.

Abstract: (Problem) To provide a small light illuminating apparatus configured to uniformly cool a plurality of light emitting diodes (LEDs) (Problem-solving approach) A light illuminating apparatus that irradiates light of a line shape includes a light source unit having a plurality of light sources arranged along a first direction on a surface of a substrate, a heat dissipation unit having a plurality of heat sink fins formed along the first direction, and thermally coupled to an opposing surface side of the substrate, a housing which receives the heat dissipation unit and forms a wind tunnel with a cooling wind flowing inside, wherein the cooling wind cools the heat sink fins, and a first cooling fan which generates the cooling wind flowing in the first direction within the wind tunnel, wherein at least one of opposite sides of a second direction of the housing has an air hole through which the cooling wind is discharged to outside via the plurality of heat sink fins, or the cooling wind is absorbed via the pluralit

Abstract: A light emitting apparatus includes a light source, a thin plate-shaped mirror unit which guides light from the light source, and a tension imparting means which imparts tension to the mirror unit. The tension imparting means may have at least any one of a first tension imparting mechanism which imparts tension in a first direction toward the light source along a surface of the mirror unit and a second tension imparting mechanism which imparts tension in a second direction opposite to the first direction, and further, the tension imparting mechanism may have at least any one of a third tension imparting mechanism which imparts tension in a third direction in parallel with the light source along the surface of the mirror unit and a fourth tension imparting mechanism which imparts tension in a fourth direction opposite to the third direction.

Abstract: Provided is an optical semiconductor apparatus including an optical semiconductor device; a light-permeable buffer layer that contains a cured high-hardness silicone resin, that has a thickness ranging from 1 ?m to 300 ?m, and that covers at least part of a light-emitting surface of the optical semiconductor device; and a flexible sealing layer containing a cured flexible silicone resin that has a lower hardness than the light-permeable buffer layer, and that covers the optical semiconductor device and the light-permeable buffer layer. The optical semiconductor apparatus has superior heat resistance and UV resistance and is significantly prevents the breakage of a wire electrically connected to the optical semiconductor device.

Abstract: In a composite optical device having a resin layer on a surface of a glass serving as a base, the resin layer has a first area corresponding to an effective diameter range and a second area disposed outside of the first area, a surface of the first area includes a concave surface of aspheric shape at least in part, and a surface of the second area is continuous with the surface of the first area, and includes an inflection point.

Abstract: A light illuminating apparatus for irradiating light of a line shape extending in a first direction and having a predetermined line width in a second direction perpendicular to the first direction, includes a light emitting unit including a substrate, and a plurality of light sources arranged at a predetermined interval along the first direction on the substrate such that an optical axis is matched to a third direction perpendicular to the first and second directions, and a mirror unit having a mirror surface to reflect and focus the light. In a cross section of the mirror unit taken along a plane defined by the second direction and the third direction, a cross-sectional shape of the mirror surface is a curved shape resulting from rotation of each of a horizontal axis direction positive side part and a horizontal axis direction negative side part of a parabola y=ax2.

Abstract: Provided is a light guide plate for an image display device which uses lead-free glass, has excellent color reproducibility and a light weight, and may obtain a wide viewing angle. A light guide plate for an image display device, which guides image light inputted from an image display element and outputs the image light toward a user's pupil, is configured to be made of lead-free glass having a refractive index of 1.8 or more with respect to a wavelength of the image light, and to have internal transmittance of 0.6 or more with respect to a wavelength of 400 nm when a plate thickness is 10 mm.

Abstract: A light irradiation device includes a light source having a plurality of solid-state elements disposed on a substrate to be defined by a first direction and a second direction in a plurality of rows and irradiate the irradiation target with light from a third direction, an optical element refracting light from the solid-state elements, emitting the light and narrowing a spread angle of light to be emitted from the solid-state elements relative to the third direction, a first reflection portion having at least two first reflection surfaces on a downstream side in the third direction of the irradiation target and reflecting a part of light incident on the first reflection surface to the irradiation target, and a second reflection portion having a pair of second reflection surfaces disposed between the optical element and the first reflection portion and guiding light from the optical element to the first reflection surface.

Abstract: Provided is an optical filter, including an absorbing glass substrate composed of phosphate-based glass or fluorophosphate-based glass; a bonding layer with a single layer structure; and a resin layer, wherein the resin layer is provided on the absorbing glass substrate through the bonding layer, wherein the bonding layer includes a Si atom and one or more selected from a Ti atom, a Zr atom, and an Al atom; or an optical filter, including an absorbing glass substrate composed of phosphate-based glass or fluorophosphate-based glass; and a resin layer, wherein the resin layer includes a Si atom and one or more selected from a Ti atom, a Zr atom, and an Al atom, and is provided on the absorbing glass substrate.

Abstract: Provided is a light guide plate for an image display device which uses lead-free glass, has excellent color reproducibility and a light weight, and may obtain a wide viewing angle. A light guide plate for an image display device, which guides image light inputted from an image display element and outputs the image light toward a user's pupil, is configured to be made of lead-free glass having a refractive index of 1.8 or more with respect to a wavelength of the image light, and to have internal transmittance of 0.6 or more with respect to a wavelength of 400 nm when a plate thickness is 10 mm.

Abstract: Provided is a small-sized light emitting apparatus having a configuration capable of uniformly cooling multiple LEDs. A light emitting apparatus, which emits linear light, includes: a light source unit which has multiple light sources that are disposed on a surface of a substrate in parallel in a first direction; a heat dissipation unit which has multiple heat radiation fins formed in the first direction, and is thermally coupled to a rear side of the substrate; a partition plate which forms a first air channel surrounding the multiple heat radiation fins; a housing which forms a second air channel between the housing and the partition plate; and a cooling fan which receives air from the outside, guides the air to the second air channel, and forms an airflow in the first direction.

Abstract: The light illumination module includes a substrate, a plurality of wiring patterns formed in parallel on the substrate, and a plurality of LED devices disposed on the wiring patterns. Each wiring pattern has a stripe-shaped portion extending in a first direction, a first protrusion portion protruding in a second direction, and a second protrusion portion protruding in an opposite direction. The first and second protrusion portions are formed in an alternating manner along the first direction, and the LED devices are disposed on the first protrusion portion and the stripe-shaped portion at a location corresponding to the second protrusion portion. A first electrode of each LED device is electrically connected to the first protrusion portion or the stripe-shaped portion immediately below, and a second electrode of each LED device is electrically connected to the stripe-shaped portion or the second protrusion portion of an adjacent wiring pattern with a wire.

Abstract: Provided is a light guide plate for an image display device which uses lead-free glass, has excellent color reproducibility and a light weight, and may obtain a wide viewing angle. A light guide plate for an image display device, which guides image light inputted from an image display element and outputs the image light toward a user's pupil, is configured to be made of lead-free glass having a refractive index of 1.8 or more with respect to a wavelength of the image light, and to have internal transmittance of 0.6 or more with respect to a wavelength of 400 nm when a plate thickness is 10 mm.

Abstract: (Problem) To provide technology for easily manufacturing a light illuminating apparatus suitable for the performance of a power device (Problem-solving means) A light emitting device (M) includes a substrate (410) having an anode pattern (310) and a cathode pattern (320), and at least one light emitting element (330) connected to the anode pattern and the cathode pattern. The substrate has a connecting part (350) at each of two ends of the anode pattern extending in a connection direction with other light emitting device that is different from the light emitting device (M) to connect the light emitting device (M) to other light emitting device, and a connecting part (350) at each of two ends of the cathode pattern extending in the connection direction to connect the light emitting device (M) to other light emitting device.

Abstract: Provided is a heat radiating apparatus for radiating heat of a heat source in air. The heat radiating apparatus includes a support member in close contact with the heat source on a first principal surface side, a heat pipe supported by the support member, and a plurality of heat radiating fins in a space that faces a second principal surface to radiate the heat transferred by the heat pipe. The heat pipe has a first line part thermally joined with the support member, a second line part thermally joined with the heat radiating fins, and a connecting part. A plurality of heat radiating apparatuses can be connected such that the first principal surfaces are successive, and each of the plurality of heat radiating apparatuses has a receiving part for receiving the connecting parts of adjacent heat radiating apparatuses in the space that faces the second principal surface.