Abstract: No flicker is displayed on the display screen during display of moving pictures and power consumption can be reduced by adding a high quality moving picture display function. Moreover, the number of times of transfer of moving pictures by comprising a still-picture•text•system•I/O•bus interface and a moving picture interface (external display interface), providing a display operation change register (DM) and a RAM access change register (RM) which are changed selectively depending on display content (display mode) displayed on a display device and displaying the display data on the display device via a picture memory even in the moving picture display mode.

Abstract: No flicker is displayed on the display screen during display of moving pictures and power consumption can be reduced by adding a high quality moving picture display function. Moreover, the number of times of transfer of moving pictures by comprising a still-picture·text·system·I/O bus·interface and a moving picture interface (external display interface), providing a display operation change register (DM) and a RAM access change register (RM) which are changed selectively depending on display content (display mode) displayed on a display device and displaying the display data on the display device via a picture memory even in the moving picture display mode.

Abstract: In a system including a color liquid crystal panel, a drive control device for driving the panel, and a microprocessor, the drive control device reduces the burden on the microprocessor as well as power consumption. In a liquid crystal display drive control device that incorporates a memory for storing image data displayed on a color liquid crystal panel, reads out the image data sequentially from the memory, generates image signals of the three primary colors for each pixel of the panel, and outputs the image signals from external output terminals, the drive control device includes a transparency arithmetic circuit that applies calculation processing to two image data read out from built-in memory and generates data for a transparent display, supplies display data generated by the transparency arithmetic circuit to a driver, and makes the driver generate and output drive signals to the liquid crystal panel.

Abstract: In a system including a color liquid crystal panel, a liquid crystal display drive control device for driving the panel, and a microprocessor, the display drive control device of the invention lightens the burden imposed on the microprocessor as well as reduces the power consumption of the system.

Abstract: A display control device and technique for controlling displays on a display unit, in which a plurality of display segments are two-dimensionally arranged (e.g. a dot matrix type display unit), is provided. The technique is effectively applicable to a write data latch circuit of a memory for storing display data in the display control device, such as, for example, a liquid crystal display control device, a mobile electronic apparatus, etc. A display drive control technique for controlling a moving picture display mode of a display device is also provided. The display drive control circuit controls a picture display mode of a display device for displaying still pictures and moving pictures to a liquid crystal display device, such as, for example, a dot matrix type display devices, an organic EL display device, etc.

Abstract: A magnetic circuit includes an annular magnet magnetized in the axial direction thereof; an annular stacked plate disposed on the magnet and including first and second annular plates; and a yoke facing the inner circumferential surface of the stacked plate across a cylindrical space. Upper and lower magnetic gaps are provided at two axially separated positions in the cylindrical space. A loudspeaker includes the magnetic circuit; a voice coil placed in the upper and lower magnetic gaps; a diaphragm connected to the voice coil; and a frame fixed to the stacked plate and supporting the diaphragm in a vibratable manner. The inner circumferential portions of the first and second annular plates are axially deformed downward and upward, respectively, such that the inner circumferential surface of the stacked plate faces the lower and upper magnetic gaps. The remaining portions of the first and second annular plates are stacked on the magnet.

Abstract: In a system including a color liquid crystal panel, a liquid crystal display drive control device for driving the panel, and a microprocessor, the display drive control device of the invention lightens the burden imposed on the microprocessor as well as reduces the power consumption of the system.

Abstract: In a system including a color liquid crystal panel, a liquid crystal display drive control device for driving the panel, and a microprocessor, the display drive control device of the invention lightens the burden imposed on a microprocessor as well as reduces the power consumption of the system.

Abstract: A magnetic circuit includes an annular magnet magnetized in the axial direction thereof; an annular stacked plate disposed on the magnet and including first and second annular plates; and a yoke facing the inner circumferential surface of the stacked plate across a cylindrical space. Upper and lower magnetic gaps are provided at two axially separated positions in the cylindrical space. A loudspeaker includes the magnetic circuit; a voice coil placed in the upper and lower magnetic gaps; a diaphragm connected to the voice coil; and a frame fixed to the stacked plate and supporting the diaphragm in a vibratable manner. The inner circumferential portions of the first and second annular plates are axially deformed downward and upward, respectively, such that the inner circumferential surface of the stacked plate faces the lower and upper magnetic gaps. The remaining portions of the first and second annular plates are stacked on the magnet.

Abstract: No flicker is displayed on the display screen during display of moving pictures and power consumption can be reduced by adding a high quality moving picture display function. Moreover, the number of times of transfer of moving pictures by comprising a still-picture•text•system•I/O bus•interface and a moving picture interface (external display interface), providing a display operation change register (DM) and a RAM access change register (RM) which are changed selectively depending on display content (display mode) displayed on a display device and displaying the display data on the display device via a picture memory even in the moving picture display mode.

Abstract: A spacer for mounting around the outer peripheral surface of a bobbin. The spacer has first and second edge surfaces formed in a circular arc shape. Subsequent to the formation of a first coil by winding wire around the bobbin, the wire is continuously curved from a distal end portion of the first coil along the first edge surface of the spacer. After making a U-turn of substantially 180 degrees, the wire is wound to form the second coil. Upon completion of winding of the second coil, the wire is guided along the second edge surface, from an end portion of the second coil, and a second portion of the first coil is wound. The portion of the wire for connecting both of the first and second coils is free from bent corners, thus avoiding the generation of stress concentration. Also, the wire is guided by smooth and curved edge surfaces of the spacer, thus preventing damage to a coating on the wire.

Abstract: A spacer for mounting around the outer peripheral surface of a bobbin. The spacer has first and second edge surfaces formed in a circular arc shape. Subsequent to the formation of a first coil by winding wire around the bobbin, the wire is continuously curved from a distal end portion of the first coil along the first edge surface of the spacer. After making a U-turn of substantially 180 degrees, the wire is wound to form the second coil. Upon completion of winding of the second coil, the wire is guided along the second edge surface, from an end portion of the second coil, and a second portion of the first coil is wound. The portion of the wire for connecting both of the first and second coils is free from bent corners, thus avoiding the generation of stress concentration. Also, the wire is guided by smooth and curved edge surfaces of the spacer, thus preventing damage to a coating on the wire.

Abstract: A speaker including a magnetic circuit formed by an annular yoke and an annular magnet which are concentric around a central axis and face each other across a gap. The magnet includes an N pole region and an S pole region successively arranged along the central axis direction and divided by an imaginary boundary line. At rest, a first coil is positioned in the gap in the N pole region, and a second coil is positioned in the gap in the S pole region. When the coils are driven by an excessively large current, a portion of the first coil moves beyond the boundary line to enter the S pole region, thereby causing a gentle first damping force on the first coil to prevent an excessive displacement. Likewise, the excessive current causes the second coil to move beyond the boundary line to enter the N pole region, thereby causing a second damping force which is opposite in direction to the first damping force.

Abstract: An electronic device connection terminal including a holder, formed from an insulator, mounted on a metallic frame of the electronic device, and a metallic terminal embedded in the holder and having one end protruding from the holder inside of the frame, the metallic terminal having connected thereto a lead wire extending from an electronic circuit located inside the frame. An insulation wall extends from the holder to oppose the lead wire retained by the metallic terminal and is interposed between the metallic terminal and the inner wall of the frame. The insulation wall is integrally formed with the holder in order to prevent a short circuit of the lead wire to the inner wall of the frame.

Abstract: A speaker in which the inner peripheral face of a ring-shaped soft ferrite core is cemented to a cylindrical projection extending from a lower portion of a bowl-shaped frame. An outer peripheral surface of a co-axially disposed ring-shaped bond magnet is fitted into a recess of the frame. Two magnetic gaps are formed between facing surfaces of the ring-shaped bond magnet and the ring-shaped soft ferrite core. Two voice coils are mounted on a cylindrical bobbin and suspended from a vibratory diaphragm such that the voice coils are inserted into the magnetic gaps.