Abstract: A gas meter comprises a filter device having a filter for removing dust from gas that has flowed in from an inflow opening on the upstream side of a flow measurement module. The filter is disposed as to cover the inlet opening, and at least of a portion of the filter forms a plurality of filter partitions disposed spaced apart from one another toward the downstream side. At least two of the filter partitions have openings at different positions toward the downstream side.

Abstract: A light guide plate formed from a panel transparent to visible light has a first incidence surface provided to form a sidewall of the light guide plate that faces a light source configured to emit visible light, and a plurality of prisms provided in a predetermined region on one surface of the light guide plate. The prisms include a reflection surface that reflects the visible light emitted from the light source and entering the light guide plate from the first incidence surface toward another surface of the light guide plate. The predetermined region is divided into a plurality of local regions corresponding to a plurality of tones in the predetermined region when seen from a predetermined viewpoint, and in each local region, the orientation of the reflection surface of the prisms distributed in the local region is established in accordance with the tone corresponding to that local region.

Abstract: A display device includes a transparent liquid crystal panel configured to allow an object arranged at the rear surface to be viewed from the front surface; a first polarizer arranged on at least one of the front surface and the rear surface of the transparent liquid crystal panel; a light source; a light guide element arranged at the other of the front surface and the rear surface of the transparent liquid crystal panel; a second polarizer arranged between the light guide element and the transparent liquid crystal panel, or between the light guide element and the light source and arranged to not block at least a portion of light transmitted through the light guide element via the object; and a controller.

Abstract: A display device includes a transparent liquid crystal panel configured to allow an object arranged at the rear surface to be viewed from the front surface; a first polarizer arranged on at least one of the front surface and the rear surface of the transparent liquid crystal panel; a light source; a light guide element arranged at the other of the front surface and the rear surface of the transparent liquid crystal panel; a second polarizer arranged between the light guide element and the transparent liquid crystal panel, or between the light guide element and the light source and arranged to not block at least a portion of light transmitted through the light guide element via the object; and a controller.

Abstract: A light guide plate formed from a panel transparent to visible light has a first incidence surface provided to form a sidewall of the light guide plate that faces a light source configured to emit visible light, and a plurality of prisms provided in a predetermined region on one surface of the light guide plate. The prisms include a reflection surface that reflects the visible light emitted from the light source and entering the light guide plate from the first incidence surface toward another surface of the light guide plate. The predetermined region is divided into a plurality of local regions corresponding to a plurality of tones in the predetermined region when seen from a predetermined viewpoint, and in each local region, the orientation of the reflection surface of the prisms distributed in the local region is established in accordance with the tone corresponding to that local region.

Abstract: A reflection structure configured to be disposed on a light guide body that guides a light beam incident from a light source and causes the light beam to exit from a light emitting area set in a light exit surface, having a reflection surface that reflects the light beam emitted from the light source toward the light emitting area. When the reflection structure is viewed from a direction perpendicular to the light exit surface, a pointed end is arranged in a direction orthogonal to a traveling direction of the reflected light beam, and an angle formed between the traveling direction of the reflected light beam and a normal direction of an end edge of the reflection surface connected to the pointed end is less than or equal to ?38.327x2+152.3x?94.014, wherein x is a refractive index of the light guide body.

Abstract: A reflection structure configured to be disposed on a light guide body that guides a light beam incident from a light source and causes the light beam to exit from a light emitting area set in a light exit surface, having a reflection surface that reflects the light beam emitted from the light source toward the light emitting area. When the reflection structure is viewed from a direction perpendicular to the light exit surface, a pointed end is arranged in a direction orthogonal to a traveling direction of the reflected light beam, and an angle formed between the traveling direction of the reflected light beam and a normal direction of an end edge of the reflection surface connected to the pointed end is less than or equal to ?38.327x2+152.3x?94.014, wherein x is a refractive index of the light guide body.

Abstract: A connecting terminal for a connector has a fixed portion configured to be connected to an electrode portion provided in a member for mounting the connector, and a contact configured to electrically come in contact with a contact portion of a connected portion to be connected to the connector. At least one concave portion is provided along a whole outer peripheral surface of the connector terminal.

Abstract: A method for manufacturing a metal component includes the steps of forming a resist film on a surface of an electrode plate, making the resist film exposed to light by use of a photomask having a mask pattern, in at least part of a rim of which a fine concavity and convexity are drawn, developing the resist film, to form an opening for molding in the resist film, and epositing an electroforming material by electroforming inside the opening for molding, to mold the material.

Abstract: A method for manufacturing a metal component includes the steps of forming a resist film on a surface of an electrode plate, making the resist film exposed to light by use of a photomask having a mask pattern, in at least part of a rim of which a fine concavity and convexity are drawn, developing the resist film, to form an opening for molding in the resist film, and epositing an electroforming material by electroforming inside the opening for molding, to mold the material.

Abstract: A connecting terminal for a connector has a fixed portion configured to be connected to an electrode portion provided in a member for mounting the connector, and a contact configured to electrically come in contact with a contact portion of a connected portion to be connected to the connector. At least one concave portion is provided along a whole outer peripheral surface of the connector terminal.