Abstract: A planar light source device includes a plurality of light sources that is independently drivable, a first light guide to emit light incident from the first light source from an emitting surface in an emitting direction, a second light guide that is contained in a second light emitting region adjacent to a first light emitting region containing the first light guide and emits light incident from a second light source from the emitting surface in the emitting direction, and a partition frame having a partition wall that is positioned between the first light guide and the second light guide, partitions the first light emitting region and the second light emitting region, and is provided with a gap from the emitting surface of the first light guide, in which an angle formed by a wall surface and a bottom face of the partition wall is an acute angle.

Abstract: A refrigerator system capable of reducing decrease in the accuracy of detecting change in a storage state and reducing a communication load for transmitting images of the inside of a storeroom, which are taken at a plurality of viewpoints to the outside of a refrigerator is provided. To achieve this, the refrigerator system includes: a camera configured to take the images of the inside of the storeroom; a camera moving device configured to move the camera at least in the vertical direction; a communication device configured to transmit the images taken by the camera to the outside of a main body; and a change detecting device configured to detect change in a food-item storage state of each shelf based on the images taken by the camera. The camera takes images of each shelf at a first viewpoint and a second viewpoint. The change detecting device detects change in the food-item storage state of the shelf based on the image taken at the first viewpoint.

Abstract: A refrigerator includes: a main body having a storeroom for storing a food item; a shelf plate arranged in a storeroom, the shelf plate on which a food item is put; a door that opens and closes a side of the storeroom; a camera arranged on an inner surface of the door, the camera takes an image of an inside of the storeroom; a camera moving device that moves the camera in a vertical direction. The camera moving device stops the camera at one or more points for each of between the shelf plates located adjacent to each other, and between an inner surface of a top edge of the storeroom and the shelf plate located adjacent to the inner surface of the top edge of the storeroom, and the camera takes an image each time when the camera moving device stops moving the camera.

Abstract: An image reading device (1) includes a board (24) including a plurality of imaging elements (23) arranged along a scanning direction, and a housing (13) including (i) a plurality of optical components that are arranged along the scanning direction and (ii) a plurality of housing components (13a, 13b) that are arranged along the scanning direction. Each of the plurality of optical components focuses light reflected by a reading target onto a corresponding imaging element (23), and each of the plurality of housing components holds at least one optical component. The plurality of housing components (13a, 13b) are arranged to have a clearance therebetween and each of the plurality of housing components (13a, 13b) is fixed to the board (24) at a position to transmit light through the optical components to focus onto the corresponding imaging element (23).

Abstract: A planar light source device includes a plurality of light sources that is independently drivable, a first light guide to emit light incident from the first light source from an emitting surface in an emitting direction, a second light guide that is contained in a second light emitting region adjacent to a first light emitting region containing the first light guide and emits light incident from a second light source from the emitting surface in the emitting direction, and a partition frame having a partition wall that is positioned between the first light guide and the second light guide, partitions the first light emitting region and the second light emitting region, and is provided with a gap from the emitting surface of the first light guide, in which an angle formed by a wall surface and a bottom face of the partition wall is an acute angle.

Abstract: A refrigerator system capable of reducing decrease in the accuracy of detecting change in a storage state and reducing a communication load for transmitting images of the inside of a storeroom, which are taken at a plurality of viewpoints to the outside of a refrigerator is provided. To achieve this, the refrigerator system includes: a camera configured to take the images of the inside of the storeroom; a camera moving device configured to move the camera at least in the vertical direction; a communication device configured to transmit the images taken by the camera to the outside of a main body; and a change detecting device configured to detect change in a food-item storage state of each shelf based on the images taken by the camera. The camera takes images of each shelf at a first viewpoint and a second viewpoint. The change detecting device detects change in the food-item storage state of the shelf based on the image taken at the first viewpoint.

Abstract: A refrigerator includes: a main body having a storeroom for storing a food item; a shelf plate arranged in a storeroom, the shelf plate configured to be put a food item on; a door configured to open and close a side of the storeroom; a camera arranged on an inner surface of the door, the camera configured to take an image of an inside of the storeroom; a camera moving device configured to move the camera in a vertical direction. The camera moving device is configured to stop the camera at least one point for each of between the shelf plates lain next to each other, and between an inner surface of a top edge of the storeroom and the shelf plate lain next to the inner surface of the top edge of the storeroom, and the camera is configured to take an image at each time when the camera moving device stops the move of the camera.

Abstract: A surface light source device includes: a source to emit light including first rays and second rays emitted in mutually perpendicular directions; and an element to change a light distribution of the light. The element includes: an incident surface to receive the first and second rays; a layer including a material for diffusing the first and second rays; a first surface through which an optical axis of the element passes, part of the first rays reaching the first surface after passing through the layer without being diffused by the material; a second surface extending from the first surface toward the source, part of the second rays reaching the second surface after passing through the layer without being diffused by the material; and a reflecting surface facing the first surface, part of the first rays being reflected by the reflecting surface toward the second surface after reflected by the first surface.

Abstract: A surface light source device includes a laser beam source, a laser beam guide rod for converting a laser beam into first linear light, an LED light source, an LED light guide rod for converting LED light into second linear light extended in the same direction as the first linear light, a reflecting bar for reflecting the first linear light and the second linear light, and a light reflecting portion formed in a box shape and having an opening portion with an emission side opened and a reflecting surface on an inside of the box shape. The first linear light and the second linear light are reflected by the reflecting bar and the reflecting surface, and are emitted from the opening portion.

Abstract: A surface light source device includes laser light sources, first light guide elements, and a second light guide element. The laser light sources emit laser beams. The first light guide elements mix a plurality of laser beams emitted from the laser light sources to convert the plurality of laser beams to linear light. The second light guide element receives the linear light and converts the linear light to planar light. The laser light sources are disposed in regions separated by the first light guide elements. The surface light source device dissipates heat released from the laser light sources to the regions.

Abstract: A surface light source device includes a first light source for emitting first light, a first light guide rod for causing the first light to be incident thereon and converting the first light into first linear light, a second light source for emitting second light having a greater divergence angle than the first light, and a second light guide rod for converting the second light into second linear light extended in the same direction as the first linear light. Moreover, the surface light source device includes a reflecting bar disposed on an emitting side of the planar light from the first and second light guide rods, and a reflecting portion taking such a box shape as to have an internal wall serving as a reflecting surface, and having an opening portion on a surface at the emitting side of the planar light.

Abstract: A surface light source device includes a laser beam source, a laser beam guide rod for converting a laser beam into first linear light, an LED light source, an LED light guide rod for converting LED light into second linear light, a reflecting bar having a reflecting portion for reflecting part of the first and second linear light and a diffusion reflecting portion for diffusing and reflecting a residual part of the first and second linear light, and a light reflecting portion formed in a box shape and having an opening portion with an emission side opened and a reflecting surface on an inside of the box shape. Part of the first and second linear light is reflected by the reflecting portion and the reflecting surface, and a residual part is diffused and reflected by the diffusion reflecting portion and is emitted from the opening portion.

Abstract: A surface light source device includes a plurality of LEDs for emitting a plurality of light having different colors, and a light guide body for mixing the colors of the plurality of light and emitting light having colors mixed. The light guide body includes a light incident portion for causing the plurality of light to be individually incident, and a light emitting portion provided beside the light incident portion and changing propagation angles of the plurality of light which is incident from the light incident portion and propagated into the light guide body to mix colors, thereby controlling a quantity of light emission from the light guide body and a light emitting position.

Abstract: A surface light source device includes a laser beam source, a laser beam guide rod for converting a laser beam into first linear light, an LED light source, an LED light guide rod for converting LED light into second linear light, a reflecting bar having a reflecting region for reflecting part of the first linear light and the second linear light and a transmitting region for transmitting a residual part of the first linear light and the second linear light, and a light reflecting portion formed in a box shape and having an opening portion with an emission side opened and a reflecting surface on an inside of the box shape. In the first linear light and the second linear light, part thereof is reflected by the reflecting region and the reflecting surface and a residual part is transmitted through the transmitting region and is emitted from the opening portion.

Abstract: A surface light source device includes a first light source for emitting first light, a first light guide rod for causing the first light to be incident thereon and converting the first light into first linear light, a second light source for emitting second light having a greater divergence angle than the first light, and a second light guide rod for converting the second light into second linear light extended in the same direction as the first linear light. Moreover, the surface light source device includes a reflecting bar disposed on an emitting side of the planar light from the first and second light guide rods, and a reflecting portion taking such a box shape as to have an internal wall serving as a reflecting surface, and having an opening portion on a surface at the emitting side of the planar light.

Abstract: A surface light source device includes a laser beam source, a laser beam guide rod for converting a laser beam into first linear light, an LED light source, an LED light guide rod for converting LED light into second linear light extended in the same direction as the first linear light, a reflecting bar for reflecting the first linear light and the second linear light, and a light reflecting portion formed in a box shape and having an opening portion with an emission side opened and a reflecting surface on an inside of the box shape. The first linear light and the second linear light are reflected by the reflecting bar and the reflecting surface, and are emitted from the opening portion.

Abstract: A surface light source device includes a laser beam source, a laser beam guide rod for converting a laser beam into first linear light, an LED light source, an LED light guide rod for converting LED light into second linear light, a reflecting bar having a reflecting region for reflecting part of the first linear light and the second linear light and a transmitting region for transmitting a residual part of the first linear light and the second linear light, and a light reflecting portion formed in a box shape and having an opening portion with an emission side opened and a reflecting surface on an inside of the box shape. In the first linear light and the second linear light, part thereof is reflected by the reflecting region and the reflecting surface and a residual part is transmitted through the transmitting region and is emitted from the opening portion.

Abstract: A surface light source device includes a plurality of LEDs for emitting a plurality of light having different colors, and a light guide body for mixing the colors of the plurality of light and emitting light having colors mixed. The light guide body includes a light incident portion for causing the plurality of light to be individually incident, and a light emitting portion provided beside the light incident portion and changing propagation angles of the plurality of light which is incident from the light incident portion and propagated into the light guide body to mix colors, thereby controlling a quantity of light emission from the light guide body and a light emitting position.