Abstract: It is an object of the invention to provide a technique capable of suppressing variations in luminance in the vicinity of a light entrance surface of a light guide plate. An illumination device includes a point light source, and a light guide plate having a side surface serving as a light entrance surface opposed to the point light source, and a main surface serving as a light exit surface. The light entrance surface of the light guide plate is provided with unevenness formed by arraying at predetermined pitches a plurality of protrusions each projecting from the light entrance surface and extending in a direction perpendicular to the light exit surface. Each of the top surface and the bottom surface of the unevenness is provided with a plurality of micro protrusions each extending in the direction perpendicular to the light exit surface and having a height smaller than the above protrusion.

Abstract: A planar light source device includes: a point light source that emits light; a circuit board that has a mounting portion, on which the point light source mounted, and a fixing portion, on which a connector supplying electric power to the point light source is mounted; and a frame that holds the circuit board with the point light source, wherein the circuit board has a protruding portion that protrudes from an end portion of the fixing portion, and wherein the fixing portion of the circuit board is fixed at an inner portion of the frame, and wherein the protruding portion of the circuit board is fixed at an outer portion of the frame, which is opposite to the inner portion of the fixing portion.

Abstract: It is an object of the invention to provide a technique capable of suppressing variations in luminance in the vicinity of a light entrance surface of a light guide plate. An illumination device includes a point light source, and a light guide plate having a side surface serving as a light entrance surface opposed to the point light source, and a main surface serving as a light exit surface. The light entrance surface of the light guide plate is provided with unevenness formed by arraying at predetermined pitches a plurality of protrusions each projecting from the light entrance surface and extending in a direction perpendicular to the light exit surface. Each of the top surface and the bottom surface of the unevenness is provided with a plurality of micro protrusions each extending in the direction perpendicular to the light exit surface and having a height smaller than the above protrusion.

Abstract: An illumination unit of the present invention includes: a light guide plate; a point light source for illuminating at least one side surface of the light guide plate; and an anisotropic light diffuser provided between the light guide plate and the point light source for diffusing light emitted from the point light source. The anisotropic light diffuser has anisotropy by which a degree of diffusion differs depending on directions. The anisotropic light diffuser is an anisotropic light diffusion sheet with a particulate dispersion phase defined in an anisotropic light diffusion layer thereof.

Abstract: An object of the present invention is to provide a display device with high withstand mechanical-shock property, and improve quality of the product by controlling occurrence of display defects such as uneven luminance. The display device includes a light guiding plate 1 being provided a light source 5 on an upright surface 1b, optical sheets 2 being provided at a side of light emitting surface of said light guiding plate, a light source supporting member being provided for supporting said light source and a frame 4 having a protrusion 4a for supporting said light guiding plate from the upright surface 1b of said light guiding plate 1. Furthermore, a projection is formed at optical sheets, and cut-out, which includes the projection therebetween, is provided at the frame 4.

Abstract: The display apparatus of the invention includes a liquid crystal display panel, a front frame installed in a front face side of the liquid crystal display panel and protecting a peripheral edge portion of the liquid crystal display panel, and a middle frame including a member which is adjacent to at least a side surface of the liquid crystal display panel in an inner side of the front frame. The member of the middle frame includes a projection portion which protrudes in a front face direction of the liquid crystal display panel, and has an elastic force pushing the front frame in a front face direction of the liquid crystal display panel.

Abstract: In a drive circuit for an electric motor, there is provided a circuit board, at least one semiconductor device mounted to the circuit board and a spacer. The semiconductor device has a semiconductor chip, a chip package incorporating therein the semiconductor chip and comprising a mounting member for mounting on the circuit board, and terminals for connections of the semiconductor chip to the circuit board. The spacer is interposed between the circuit board and the mounting member of the chip package so as to provide a space between the circuit board and the chip package.

Abstract: An object of the present invention is to provide a display device with high withstand mechanical-shock property, and improve quality of the product by controlling occurrence of display defects such as uneven luminance. The display device includes a light guiding plate 1 being provided a light source 5 on an upright surface 1b, optical sheets 2 being provided at a side of light emitting surface of said light guiding plate, a light source supporting member being provided for supporting said light source and a frame 4 having a protrusion 4a for supporting said light guiding plate from the upright surface 1b of said light guiding plate 1. Furthermore, a projection is formed at optical sheets, and cut-out, which includes the projection therebetween, is provided at the frame 4.

Abstract: In a drive circuit for an electric motor, there is provided a circuit board, at least one semiconductor device mounted to the circuit board and a spacer. The semiconductor device has a semiconductor chip, a chip package incorporating therein the semiconductor chip and comprising a mounting member for mounting on the circuit board, and terminals for connections of the semiconductor chip to the circuit board. The spacer is interposed between the circuit board and the mounting member of the chip package so as to provide a space between the circuit board and the chip package.

Abstract: The object of the present invention is to make it easy to separate a portion which takes charge of the operation control of an air conditioner from the air conditioner using a remote controller, and the essential points are that the control means of the air conditioner controls the operation of a compressor to make the room temperature detected by a first temperature sensing means approach to a set temperature set by a first temperature setting means, and further comprises a changeover switch, and a means for controlling the operation of the compressor based on a signal from the remote controller when the changeover switch is in a valid state; the remote controller disposed being detached from the air conditioner comprises a second temperature sensing means for detecting the room temperature and a second temperature setting means for setting a desired temperature and transmits a signal for controlling the operation of the compressor to make the temperature detected by the second temperature sensing means appr

Abstract: An apparatus can prevent a voltage drop a the power supply that would occur when AC power is supplied to a large number of air conditioners from the same power supply simultaneously as when recovering from a power failing. The timing of applying the reset signal to a microprocessor in the apparatus is set arbitrarily by a time setting circuit. A time setting switch is used to set to an arbitrary value for the time elapsed from the generation of the reset signal to the start of an air conditioner compressor. According to the setting of this switch, the microprocessor performs a control to change the delay time for the start of the air conditioner. When the power is restored after a power failure, it is possible to prevent the air conditioners from restarting simultaneously and therefore reduce the voltage drop in the power supply.

Abstract: A method of defrost for an outdoor side heat exchanger in a heat pump having a refrigeration circuit in which a compressor, an indoor side heat exchanger, an expansion device and the outdoor side heat exchanger are connected together so that a heat collected in the outdoor side heat exchanger is radiated from the indoor side heat exchanger and that defrosting for the outdoor side heat exchanger is started when the outdoor heat exchanger is frosted, and a temperature sensor is provided to detect a temperature of the indoor side heat exchanger, wherein the defrosting is started when the temperature detected by the temperature sensor is not higher than a first predetermined level with a downward gradient, which is calculated on the basis of the temperature, of the same temperature becoming as sharp as, or sharper than, a predetermined gradient, and the first temperature level is increased after the temperature becomes as high as a second predetermined level wherein the second level.gtoreq.the first level.

Abstract: An air conditioner has a refrigeration system with a compressor, a motor for air-circulating fans, indoor and outdoor heat exchangers and a four-way valve connected through refrigerant conduits such that it can be operated selectably both for cooling and for heating. An electric heater is also provided for heating. An electrical circuit for the air conditioner has a series connection of (1) a first temperature switch which opens when the temperature of the motor becomes too high, (2) a thermostat of an ordinary kind which places its connector piece in an open or closed position by comparing room temperature with a user-set temperature level, (3) a relay which controls the switching of the compressor of the air conditioner on and off, and (4) a second temperature switch which opens when the temperature of the electric heater becomes too high.

Abstract: An air-conditioner comprises a refrigerating circuit having a compressor, a condenser, an expansion device and an evaporator which are connected by suitable refrigerant conduits. An electric current path for making a current flow through the compressor includes an AC power source, to which a current transformer is coupled, and an output of the current transformer is converted into a DC voltage which is then given as a (+) input of a comparator. A reference voltage is given to a (-) input of the comparator. When the DC voltage exceeds the reference voltage of the comparator, the high level is outputted from the comparator. When the high-level output from the comparator persists for three seconds, the compressor is stopped forcedly and a three-minute timer is turned on. After a lapse of three minutes, the flow of the current through the current path of the compressor is resumed. Thereby, a lightly locked state is removed.

Abstract: An air conditioner comprises a control portion and a refrigeration system wherein a compressor, a condenser, an expansion device and an evaporator are connected in a refrigerant flow relationship. The control portion compares the temperature measured by a room temperature sensor with the temperature set by a temperature setting switch. For heating, the compressor is stopped when the room temperature rises higher than the set temperature, and for cooling, the compressor is stopped when the room temperature falls lower than the set temperature. A special switch is installed in the control portion, and when this switch is operated, responsively the range of the temperature set by the temperature setting switch is changed. More specifically, when the switch is operated at heating the control portion lowers the upper limit of the temperature set by the temperature setting switch and at cooling, the lower limit of the temperature is heightened by the control portion.

Abstract: The present invention provides an electric heating apparatus comprising a plurality of electric heaters and cords for supplying electric power to the heaters through a connector, wherein the connector consists of two separable members, the one member (the primary connector) of the connector has a plurality of contacts and at least one conductor, the cords being separately connected to the contacts, the conductor electrically short-circuiting two contacts of the primary connector which are so selected that the conductor can form a part of a circuit for supplying electric power to a desired heater, the another member (the secondary connector) of said connector has a plurality of contacts being connected only with predetermined contacts of the primary connector, and the contacts of the secondary connector form a part of the circuit for supplying electric power to the desired heater with the contacts and the conductor of the primary connector, wherby heaters to be supplied with electric power can be determined by

Abstract: A vertical, hydraulic bending press has a ram which is connected with the hydraulic cylinder so that an even and uniform sectional modulus is applied over the full length of the ram to decrease stress concentration of the ram during bending of the workpiece. The press frame includes means for guiding the ram. Additionally, a load detection device is provided on either side of the ram so that the ram may be stopped when misloading of the ram is detected.

Abstract: The present invention relates to a press machine that has a vertically movable ram for supporting upper or lower bending tools, said ram being integrally provided with an operation member, and a position determining member having an adjustable position located at a suitable point on said press machine such that when the operation member on the ram contacts the position determining member, the vertical movement of the ram is stopped. The press machine further includes a screw mechanism that is screw-coupled to the position determining member and is movable in an axial direction, a pulse motor drive unit which turns the threaded bolt, and a manual pulse generator for operating the pulse motor from a remote location.

Abstract: The present invention relates to a press machine that has a vertically movable ram for supporting upper or lower bending tools, said ram being integrally provided with an operation member, and a position determining member having an adjustable position located at a suitable point on said press machine such that when the operation member on the ram contacts the position determining member, the vertical movement of the ram is stopped. The press machine further includes a screw mechanism that is screw-coupled to the position determining member and is movable in an axial direction, a pulse motor drive unit which turns the threaded bolt, and a manual pulse generator for operating the pulse motor from a remote location.

Abstract: A hydraulic press such as a press brake is disclosed having a pair of long movable and fixed tools which are always kept in parallel with each other by detecting the obliquities of the movable and fixed tools and controlling the fluid delivery to hydraulic motors which drive the movable tool. Each hydraulic motor is controlled by a valve which is actuated by a rocking cam arrangement. The limit of movement of the movable tool toward the fixed tool also can be easily adjusted by adjusting the rocking cam arrangement.