Abstract: Provided is a light adjusting noise reduction circuit in which the vibration noise accompanying turning ON/OFF of a piezoelectric transformer. A full bridge circuit is controlled by a full bridge drive circuit so as to switch an input voltage (VB1) from an input voltage source and outputs it to a low pass filter. The output from the low pass filter is supplied to a piezoelectric transformer. The output current (IO) from the piezoelectric transformer is supplied to a discharge tube. Each of FET of the full bridge circuit has a drive frequency decided by a voltage control type oscillator. The full bridge circuit is connected to a duty variable circuit and a peak value control circuit. The peak value control circuit forms a rise and a fall of a waveform to be (1?cos?t).

Abstract: A dimmer noise reducing circuit wherein vibration noise accompanying the activation/deactivation of a piezoelectric transformer can be reduced, while non-uniformity of brightness of a discharge lamp can be prevented. A chopping circuit turns on/off an output from an input voltage source in a given periodic manner and a full-bridge circuit that receives an output voltage (vb1) of the chopping circuit. An output from a lowpass filter is supplied to a piezoelectric transformer, an output current of which (Io) is supplied to a discharge lamp. The full-bridge circuit is controlled by a full-bridge drive circuit to switch the input voltage (VB1) from the chopping circuit. The drive frequencies of the FETs of the full-bridge circuit are decided by a voltage-controlled oscillator. The chopping circuit is connected to a duty varying circuit the full-bridge circuit is caused to operate with its duty fixed.

Abstract: An electromagnetic relay which is short in length and capable of maintaining a required insulation distance is disclosed. A first coil terminal connecting with one of extension lines of a coil is disposed in the vicinity of one end of a movable iron fragment and a card. A second coil terminal having a binding member which extends from an intermediate portion of the second coil terminal in a horizontal direction and is allowed to be bended toward the electromagnet block with the other of the extension lines of the coil bound to the binding member is further disposed below the electromagnet block.

Abstract: An electromagnetic relay which is short in length and capable of maintaining a required insulation distance is disclosed. A first coil terminal connecting with one of extension lines of a coil is disposed in the vicinity of one end of a movable iron fragment and a card. A second coil terminal having a binding member which extends from an intermediate portion of the second coil terminal in a horizontal direction and is allowed to be bended toward the electromagnet block with the other of the extension lines of the coil bound to the binding member is further disposed below the electromagnet block.

Abstract: In a disk storage having a front loading structure, a disk tray can smoothly move between a first position and a second position. The disk tray has a tray panel with a surface corresponding to an opening of a storage body. Since the surface is larger than the opening, this disk storage has a dustproof function superior to the conventional one. In addition, since an elastic member is provided generally around the opening, the tray panel will not get damaged even when the tray panel encloses the opening. The storage body may comprise cooling means for preventing the rising of the internal temperature thereof, so that malfunctioning of the parts can be prevented and the life of each part can be extended. The elastic member may comprise a sponge.