Abstract: The invention relates to a lighting apparatus having a translucent, light-diffusing panel (1), with at least one aperture lamp (2,3) arranged along one edge, extending in a straight line, of the light-diffusing panel (1) and mounted to rotate about its cylindrical axis in a mounting (6,7) and having a screen (4,5) for the at least one aperture lamp (2,3). By rotating the at least one aperture lamp (2,3) about its axis, the light input into the translucent, light-diffusing panel (1) is influenced.

Abstract: A touch sensitive switch with a light comprises a light sensor which detects a finger approaching the key top using the output of the light sensor to detect that the touch sensitive switch with a light is to be operated before the operation takes place. Notification to the person who operates the key-top can therefore be given by any predetermined effect such as a voice accruing based on the output of the light sensor just before the operation starts. Therefore, confusion does not arise even when the switch is put to a large number of uses.

Abstract: A rotatable head flashlight utilizes a bulb carrier having a circuit board on which are mounted contacts which remain in engagement with energy cells in a battery compartment, a bulb-receiving socket, and a switch assembly engageable with, and operated by, a molded shelf on the inner wall of the battery compartment. The switch includes three contacts, one being a movable contact in the form of a resilient, bridge-like element overlying both of the other contacts, the latter two contacts being printed on the circuit board.

Abstract: An indicating device fastenable using a fastening band includes a housing, a light source mount having a light source module secured at a front end of the housing; a rear cover fitted at a rear end of the housing; a reset spring secured in the housing using a spindle screw and a nut; a metallic movable shaft mount, the reset spring having an outer end positioned at a lower end of the movable shaft mount; an electrically conductive spring secured at a central portion at the other end of the movable shaft mount, and a rotary shaft mount having a lower end disposed in an annular groove at an outer side of the movable shaft mount. The rotary shaft mount is internally provided with a battery chamber adapted to receive two batteries, one end of the batteries pressing against the electrically conductive spring with the other end resting against a positive conductive plate of the light source module entering from a through hole in front.

Abstract: A highly efficient, luminous and energy-saving panel-form illuminating system suitable for mass-production, comprising at least a photoconductor, a linear light source at one side of the photoconductor, and a reflector; wherein grooves or protrusions are formed on the bottom surface of the photoconductor.

Abstract: A plane-shaped lighting device has a light-directing plate and a light source that is placed in contact with or in the proximity of the light-incident surface of the light-directing plate, and the light source is constituted of a plurality of LED lamps each of which has an LED chip for emitting light and a semispherical lens for directing the light from the LED chip into the light-directing plate. Here, the distance from the LED chip to the top of the semispherical lens is set to be 1.8 times as long as the radius of curvature of the semispherical lens. This arrangement allows the light emitted from the LED chip to be efficiently incident on the light-incident surface of the light-directing plate, thereby improving the light-incidence efficiency to the light-directing plate. Further, the application of this plane-shaped lighting device to display devices makes it possible to improve the efficiency of light utilization, and consequently to provide thinner display devices with high visibility.