Abstract: A push-button switch (1) is arranged such that, once a user presses an operation button (8), a switch body (20) performs an operation, and light from an LED (21) passes through a transmission plate (70) and then illuminates the operation button (8). A structure (700) is provided on a lower surface (70b) of the transmission plate (70) to refract the light from the LED (21) so that the refracted light is reflected within the transmission plate (70) and then guided to an upper circumferential wall (71) of the transmission plate (70).

Abstract: An operation indicating lamp-equipped electromagnetic relay has an excitation coil, a contract member that has electromagnetic interaction with the excitation coil to open and close a circuit, a housing in which the excitation coil and the contact member are disposed, and having a display surface arranged in a top surface thereof, a light source having an optical axis that is oriented toward a direction other than the display surface in order to display an operating situation of the electromagnetic relay, and being disposed in the housing so as to emit light according to a situation of power supplied to the excitation coil, a reflecting member disposed in the housing so as to reflect the light emitted from the light source toward the display surface, and a diffusion structure that diffuses the light reflected by the reflecting member formed in the display surface.

Abstract: An optical device includes a light guiding plate which guides lights within the surface parallel to an emission surface, and light converging sections onto which the lights guided by the light guiding plate are incident, each of the light converging sections having an optical surface which allows an emitted light to be emitted from the emission surface in a direction where the emitted light is to be substantially converged on one convergence point or convergence line in space or to be substantially diverged from one convergence point or convergence line in space. The light converging sections are formed respectively along a predetermined line within the surface parallel to the emission surface, and the convergence points or the convergence lines are different from each other among the light converging sections, and an image is formed in space by an aggregation of the convergence points or the convergence lines.

Abstract: A relay has a case, a relay body disposed in the case, a light source disposed in the case that emits light in accordance with an operation of the relay body, a light guide path which that receives, via a first end surface, the light emitted from the light source, and causes the light to exit outward from a second end surface, and a diffusion structure disposed in an optical path of the light which exits from the second end surface of the light guide path.

Abstract: A display device has a liquid crystal panel that switches between a transparent state and an opaque state, a first light source, a light guide plate arranged on a back surface of the liquid crystal panel and made of a transparent material, the light guide plate having an incident surface facing the first light source and an outgoing surface facing the back surface of the liquid crystal panel, propagating light emitted from the first light source and incident through the incident surface, and outputting the light toward the liquid crystal panel from the outgoing surface, and a second light source configured to illuminate an object arranged on an opposite side to the liquid crystal panel with the light guide plate interposed therebetween.

Abstract: An operation indicating lamp-equipped electromagnetic relay has an excitation coil, a contract member that has electromagnetic interaction with the excitation coil to open and close a circuit, a housing in which the excitation coil and the contact member are disposed, and having a display surface arranged in a top surface thereof, a light source having an optical axis that is oriented toward a direction other than the display surface in order to display an operating situation of the electromagnetic relay, and being disposed in the housing so as to emit light according to a situation of power supplied to the excitation coil, a reflecting member disposed in the housing so as to reflect the light emitted from the light source toward the display surface, and a diffusion structure that diffuses the light reflected by the reflecting member formed in the display surface.

Abstract: A relay has a case, a relay body disposed in the case, a light source disposed in the case that emits light in accordance with an operation of the relay body, a light guide path which that receives, via a first end surface, the light emitted from the light source, and causes the light to exit outward from a second end surface, and a diffusion structure disposed in an optical path of the light which exits from the second end surface of the light guide path.

Abstract: A push-button switch (1) is arranged such that, once a user presses an operation button (8), a switch body (20) performs an operation, and light from an LED (21) passes through a transmission plate (70) and then illuminates the operation button (8). A structure (700) is provided on a lower surface (70b) of the transmission plate (70) to refract the light from the LED (21) so that the refracted light is reflected within the transmission plate (70) and then guided to an upper circumferential wall (71) of the transmission plate (70).

Abstract: There is provided a switch having a wide, uniform luminance region. In the switch, light emitted from a light source is output through an outgoing surface located in an upper end surface of a light guide, the light being incident from an incident surface located in a lower end surface of the light guide arranged above the light source. A concave lens is formed in the incident surface of the light guide, and a microlens array is formed in the outgoing surface of the light guide.

Abstract: A light guide plate has a light incident surface configured to be arranged facing a point light source for introducing light from the point light source, a light outputting surface that outputs the light to an outside of the light guide plate, a light introducing section for confining the light from the point light source entered from the light incident surface, and a light guide plate main body having a thickness smaller than a maximum thickness of the light introducing section and being arranged to be continuous with the light introducing section, for outputting the confined light to the outside of the light guide plate from the light outputting surface by a light outputting element.

Abstract: An area light source device that is capable of evenly emitting light by reducing leakage in the vicinity of the light source, and enhancing the light emission luminance by exiting light of narrower directional characteristics. A light guide substrate includes a light introducing section and a light guide plate main body. Diffusion patterns are provided at the light exit surface of the light guide plate main body. A low refraction index layer is formed at the lower surface of the light guide plate main body, and a reflection layer is formed at the lower surface of the low refraction index layer. The point light source is positioned facing an end face of the light introducing section. A directivity conversion unit is arranged on the upper surface of the light introducing section. The directivity conversion unit is configured by radially arraying a directivity conversion pattern having a V groove shape.

Abstract: A surface light source device includes a point source of light and a light guide plate causing light from the point source of light introduced from a light incident end face and emitted from a light emission surface to outside. The light guide plate is formed of a light introducing portion provided at an end of a light guide plate body. The point source of light is placed facing the light incident end face positioned at an end face of the light introducing portion. Along a region of the light introducing portion adjacent to the light guide plate body, a directivity converting portion is provided. The directivity converting portion is configured by arranging V-grooved directivity conversion patterns in an arc shape. A region of the light introducing portion has a thickness equal to that of the light guide plate body and has a surface positioned in the same plane.

Abstract: An area light source device that is capable of more evenly emitting light and capable of enhancing the light emission luminance by exiting light of narrower directional characteristics. A light guide substrate includes a light introducing section and a light guide plate main body for exiting the light from a light exit surface. A number of diffusion patterns are formed at the light exit surface. A low refraction index layer is formed at the lower surface of the light guide plate main body, and a reflection layer is formed at the lower surface of the low refraction index layer. The point light source is arranged at a position facing the end face of the light introducing section. A tapered portion inclined to gradually increase the thickness of the light introducing section the farther away from the light source is arranged on the upper surface of the light introducing section.

Abstract: A light guide plate (63) includes a light introducing section (65), which is at a position facing a point light source (62), for confining light from the point light source, and a light guide plate main body (64), which has a thickness smaller than a thickness at an end of the light introducing section on the point light source side, for outputting the confined light to an outside from a light outputting surface by light outputting means (70). The light introducing section (65) has an inclined surface (67), which is inclined from a surface of the light introducing section towards a surface of the light guide plate main body (64). The inclined surface (67) has a directivity converting pattern (68) for converting a directivity expansion in a thickness direction of the light guide plate of the light entered to the light introducing section (65) to directivity characteristics tilted towards a direction parallel to a surface direction of the light guide plate.

Abstract: A light guide plate is formed of a light introducing part positioned to face a point light source for confining light and a light guide plate body having a thickness smaller than the thickness of an end of the light introducing part on a point light source side and causing the confined light to be output from a light exit surface to outside. The light introducing part has an inclined surface, and a directivity conversion pattern formed on the inclined surface. The directivity conversion pattern is configured by arranging V grooves in parallel to each other, each having a vertical angle of 120°, and each extends in a direction approximately perpendicular to a light incidence end face of the light guide plate. The length of the inclined surface in a inclination direction where part of light incident to the light introducing part enters the inclined surface at least twice.