Abstract: Electronic equipment having a tone generating function has a memory which stores rhythm patterns. Rhythm pattern data which is stored in the memory is sequentially read out by key-in operation at a key input section which selects a desired rhythm pattern. The number of depressing operations by a tempo setting key at the key input section is counted at a counter. The rhythm pattern data which is read out from the memory is set in a predetermined pattern. A control circuit controls the readout speed of the rhythm pattern data in accordance with the counting value of the counter.

Abstract: Predetermined performance keys in a group for a low octave section are used as read-out keys for reading out accompaniment memorized in a first memory, and the other keys in the keyboard are used as read-out keys for reading out melody memorized in a second memory. The read-out accompaniment and melody contents are reproduced with a first tone color designated by a first tone color designation switch given to the accompaniment and a second tone color designated by a second tone color designation switch given to the melody.

Abstract: An electronic musical instrument employs a novel technique to produce a musical sound. A major part of a musical sound producing section of the electronic musical instrument is constructed by digital circuitry which is well adapted for an LSI fabrication. The electronic musical instrument comprises a volume control means to digitally perform a volume control to increase or decrease a performance volume, a period counting means to count one cycle of a musical sound wave by a plurality of counting steps in order to form a musical sound wave under digital control, a period control means to control the period counting means in accordance with the scale represented by a depressed performance key, and a means to instruct the rise and the fall of a musical sound wave by a value which is an integral multiple of a control value of the volume control means, for each block including a predetermined number of counting steps.

Abstract: A voice sound producing electronic data processing apparatus has an electronic data processing main body, a visual display device and a voice sound outputting device having at least one loudspeaker. The voice sound outputting device is coupled to the display device and both are rotatably supported on the electronic data processing main body through a support part having a rotating mechanism such that the loudspeaker and the display device always face in the same direction.

Abstract: Electronic equipment having a tone generating function of the invention has a timbre waveform memory for providing timbre to a frequency signal corresponding to each note. The timbre waveform memory is constituted by n bits for each timbre, each bit storing a binary coded signal of level "1" or "0" in accordance with the type of timbre. The timbre waveform stored in the timbre waveform memory corresponds to each numeric code and is specified by a key-in operation of numeric keys.

Abstract: A miniaturized electronic apparatus having an alarm sound generating function comprises an alarm sound data memory, in which alarm sound data for a plurality of different alarm sounds are memorized. Peculiar alarm sounds can be preset for each season or month or weekday so that upon reaching of an alarm time in the corresponding season or month or on the corresponding weekday it is selectively read out from the memory to produce the corresponding alarm sound from a sound generator. A designated order of the plurality of different alarm sounds can also be set in the apparatus.

Abstract: A cleaning device for an image forming apparatus includes a magnetic brush for causing a magnetic carrier and a toner to slindingly rub a surface of a photoconductor and removing the residual toner adhering on the photoconductor surface. The cleaning device further comprises a toner recovery assembly with a bias voltage applied thereto and for electrostatically attracting the surplus toner in the magnetic brush, a detector for detecting a toner density of the magnetic brush in terms of a magnetic permeability or a resistance of the magnetic brush and a bias voltage control means for controlling the bias voltage to be applied to the toner recovering system in accordance with a detected output of the toner density detector.

Abstract: A basic coefficient to be used for calculation of a transfer function of a digital filter is read out from a ROM according to a cutoff frequency of a desired filter. The value of the coefficient read out from the ROM is gradually varied according to a desired resonance characteristic by an arithmetic circuit so as to reduce the memory capacity of the ROM for storing coefficients.

Abstract: Bar codes representing rhythm data corresponding to rhythm pattern, rhythm progression or a certain kind of rhythm are printed in relation to a musical score, and are read out by scanning with a bar code reader. The rhythm data thus read out are stored in RAMs under the control of a CPU. The rhythm data stored in the RAMs are read out by the CPU and supplied through an amplifier to a loudspeaker, for producing sounds.

Abstract: A CPU provides control instructions according to key switch information supplied from a keyboard. An LSI receives the control instructions and generates a corresponding digital tone signal, which is converted in an acoustic system into an analog tone signal which is in turn supplied to a loudspeaker for producing sound. A power supply unit can be connected to the LSI and acoustic system through a transistor. The transistor is on-off controlled according to a power-off signal which is provided from the CPU according to a silent state signal generated from a power saving circuit in the LSI.

Abstract: An electronic game apparatus having a display unit which is capable of displaying at least a series of numbers and decimal points the number of which is equal to the number of the series of numbers. Among the numbers, any number part of which is not displayed is defined as a target. The target is shifted toward one direction. With one of the function keys, a missile the shape of which corresponds to the non-displayed portion of the target is shifted toward a direction opposite to that of the target. When the non-displayed portion of the target is hit by the missile so as to complete the figure, the decimal point in an effective firing range (display frame or digit) where a missile digit and a target digit coincide disappears. Thus, points are made. The game continues until the missiles which have been given at the start of the game are used up. Points at each stage are added and final score is displayed when the game is over.

Abstract: Frequency data read out from a frequency data conversion ROM in response to a key code generated at a keyboard according to a depressed note key is accumulated at an accumulator and the accumulated result is supplied to an A input terminals of an adder. On the other hand, envelope data generated by an envelope data generating circuit is supplied to a B input terminal of the adder through exclusive OR gates under the control of a clock .0.. The frequency data and envelope data are summed at the adder and the resultant of addition is supplied as an addressing signal to a sine wave ROM for reading out therefrom an envelope-controlled musical sound signal.

Abstract: A dot matrix type multi-layered liquid crystal display device has at least two liquid crystal display sections. Each liquid crystal display section has a dot matrix of transparent electrodes, and the individual liquid crystal display sections are arranged in layers such that their respective dot matrices of transparent electrodes overlie one another.

Abstract: When a key among ten keys or function keys in a keyboard section is operated with a mode selection switch in a key input section set in a recording position, the note data corresponding to the operated key, flag data and tone duration data corresponding to that note data are stored as one-key play note data in a note memory. When a one-key play key is operated in a timed relation to a given rhythm after clearing an address counter in the aforementioned state, musical sound is generated according to the note data stored in the note memory, and at the same time note data is stored again together with flag data for auto play and tone duration data in the note memory.

Abstract: A transparent operation plate is disposed on the operation panel of an input device in correspondence with tone information to be input. A pair of touch contacts are formed exposed on the surface of each transparent operation plate. A liquid crystal display element is disposed immediately below the transparent operation plate. The liquid crystal element displays characters representing the tone information, as well as the information input operation condition. This display can be visually confirmed through the transparent operation plate.

Abstract: A digital musical tone signal is generated in a first LSI selected by a chip select signal transferred from a CPU in accordance with a control signal transferred through a control bus from the CPU. Amplitude data and envelope data are transferred from a second LSI to the first LSI through data lines. In the first LSI, the digital musical tone signal amplitude- and envelope-controlled is transferred to an A/D converter where it is converted into an analog musical tone signal.

Abstract: Bar code data are read out by a bar code reader from a medium on which predetermined tone data are printed in the form of bar codes and are successively stored in a RAM. When a mode selection switch is set to a position "NAVI", a LED provided in the vicinity of a performance key corresponding to the pitch of a tone next to be produced next, is turned on under the control of a control section. Performance of music can be obtained by successively operating performance keys indicated by associated LEDs turned on one after another.

Abstract: The data display device has a memory section to store a specific day or days for different countries or regions of the world. The specific day data read out from the memory section, and which is peculiar to a specific country or region, is transferred to a display section to be displayed thereby.

Abstract: Waveform data for converting attack, decay and release status sections of a musical sound envelope into an exponential function waveform is obtained from an envelope generator wherein exponential function waveform data is read out from a ROM or obtained through calculation based upon an exponential function in a digital logic processing circuit, and it is used for the envelope control of a tone signal from a digital wave generator.

Abstract: An electronic device with an alarm function has a time count circuit for providing time data and a date count circuit for providing date data. The electronic device also produces an alarm sound at an alarm time. When the date data represents a specific day, the electronic device produces a melody different from the alarm sound to tell the specific day.