Mitsumi Electric Inactive USPTO patents

Provided is a lens drive device that, using drive force from a voice coil motor, automatically carries out focusing by moving an autofocus movable unit with respect to an autofocus fixed unit in the direction of an optical axis.

A battery protection circuit protects a rechargeable battery from overdischarge, by turning off a transistor inserted in series in a current path between a negative electrode of the battery and a negative terminal coupled to ground of a load or a charger.

The present invention provides an optical scanning control device and a retina scanning projection device provided with a structure for suppressing heat transfer to a laser module, and a heat dissipation structure for dissipating the heat of the laser module.

A connector includes: a plurality of contacts each of which includes one end to be connected to a mating contact of a mating connector; a housing main body inside which a portion between the one end and the other end of each of the plurality of contacts is disposed, the housing main body being configured to support the plurality of contacts such that the plurality of contacts are disposed side by side; and an elastic sealing material to be provided on a side of the other end with respect to the housing main body in such a manner as to come into tight contact with peripheries of the plurality of contacts, the elastic sealing material serving as a seal against water ingress between the housing main body and the plurality of contacts from a side of the one end to the side of the other end.

A power controlling semiconductor device generates a drive pulse to turn on or off a switching device which applies an intermittent current to a primary side winding of a transformer in response to a voltage proportional to a present current flowing through the primary side winding of the transformer and to an output voltage detection signal from a secondary side of the transformer.

A control device, which controls a laser scanning display device, includes a laser device, a first current source that generates a first driving current supplied to the laser device, a second current source that generates a second driving current supplied to the laser device, and a controller.

A method for manufacturing an optical module includes a step of mounting a light emitting device on a board having a plurality of electrodes on its surface in a facedown manner, a step of disposing a resin sheet containing a light conversion material so as to face the surface on which the light emitting device is mounted of the board and filling a space between the resin sheet and the board including the resin sheet and the light emitting device with a first light transmissive resin, a step of covering a surface opposite to a surface of the resin sheet covered with the first light transmissive resin with a second light transmissive resin, a step of forming a groove extending from a top surface of the second light transmissive resin to a predetermined depth of the board, a step of filling the groove with the light reflective resin and covering the top surface of the second light transmissive resin with the light reflective resin, a step of removing the light reflective resin on the second light transmissive resin, and a step of dicing the light emitting device by cutting along the light reflective resin such that an outer lateral surface is covered with the light reflective resin by leaving part of the light reflective resin filled in the groove.

An optical scanning device is provided.

An optical scanning device that scans incident light by causing a mirror to oscillate is provided.

This lens driving device comprises an autofocus (AF) driving unit and a shake correction driving unit, wherein a shake correction support member has a pair of power supply suspension wires and a pair of signal suspension wires.

A semiconductor integrated circuit for a regulator includes an output controlling transistor, a controller circuit, a breeder resister and a current limiting resistor.

A power controlling semiconductor device generates a drive pulse to turn on or off a switching device which applies an intermittent current to a primary side winding of a transformer in response to a voltage proportional to a present current flowing through the primary side winding of the transformer and to an output voltage detection signal from a secondary side of the transformer.

A scan driving device includes a waveform generator that generates a sawtooth driving waveform having a rise period in which a signal level rises, and a fall period in which the signal level falls, and a driving circuit that drives an optical scanning device, that resonates at a natural resonant frequency thereof, by a sawtooth driving voltage waveform corresponding to the sawtooth driving waveform.

A mirror driving device includes a detector configured to output a detection signal having a ringing component included in oscillation of a mirror, a driving waveform generator configured to generate a sawtooth driving waveform that oscillates the mirror, a superimposing waveform generator configured to generate a superimposing waveform to be superimposed to the sawtooth driving waveform, a periodic signal generator configured to generate a periodic signal having a frequency identical to or near a ringing frequency of the ringing component, a correlation calculator configured to calculate a correlation value between the periodic signal and the detection signal, and an amplitude adjuster configured to adjust an amplitude of the superimposing waveform to reduce the ringing component, based on the correlation value.

A control apparatus is used in a display apparatus.

In a lens holder driving device, each of an upper plate spring and a lower plate spring, which are respectively provided on an upper side and a lower side of a lens holder, has an inner peripheral side end fixed to the lens holder, an outer peripheral side end fixed to a fixing part, and a plurality of arms.

A two-dimensional scan type light scanning device is configured to perform oscillation of a mirror in a first direction and a second direction perpendicular to the first direction.

A lens driving device is provided with: a driving part including a movable part and a fixing part, a base member having a rectangular shape in plan view, wherein a shield cover is attached at a peripheral portion of the base member, and a side surface of the peripheral portion and a lower inner peripheral surface of the shield cover are bonded to each other, and a ground terminal part disposed in the base member.