Abstract: A semiconductor laser device comprises a stem serving as a base; a laser diode LD submount having surface electrodes arranged thereon and joined to the surface of the stem; an LD chip joined to the surface electrode and connected with the surface electrode; and leads fixed in through holes formed in the stem by means of sealing parts and electrically connected to the surface electrodes via embedded layers in via holes formed in the LD submount, wherein grooves are formed in portions of the sealing parts or in portions of the LD submount around the connections between the leads and the embedded layers, to obtain a good modulated light waveform.

Abstract: A voltage detector 22 has an input port IN connectable to a steering remote control 6 of a voltage dividing type adapted to output one of output voltages different from each other for each of key switches to be pressed by a user, and detects through the input port IN an output voltage output from the steering remote control 6. A pull-up resistor 21a is connected in series between the input port IN and a power supply Vdd supplying a voltage to the steering remote control 6, and has a variable resistance. A controller 23 controls the pull-up resistor 21a to have sequentially changed resistances in a course of pressing the key switches. A processor 3 operates on sets of output voltages given respectively for the resistances in the course of pressing the key switches, to select a resistance of the pull-up resistor.

Abstract: A voltage detector 22 has an input port IN connectable to a steering remote control 6 of a voltage dividing type adapted to output one of output voltages different from each other for each of key switches to be pressed by a user, and detects through the input port IN an output voltage output from the steering remote control 6. A pull-up resistor 21a is connected in series between the input port IN and a power supply Vdd supplying a voltage to the steering remote control 6, and has a variable resistance. A controller 23 controls the pull-up resistor 21a to have sequentially changed resistances in a course of pressing the key switches. A processor 3 operates on sets of output voltages given respectively for the resistances in the course of pressing the key switches, to select a resistance of the pull-up resistor.