Canon Kabushiki Kaisha

Hideya Tabeta

Takehiro Yoshida

Daisuke Suga

Junji Iguchi

Shunichi Fujise

Michihiro Izumi

Naoto Kagaya

Akihiro Uchimi

Shiyunichi Fujise

An image forming apparatus includes a print head, a main control unit, a head control unit, and a head unit power supply to generate a voltage to be supplied to the head control unit. The main control unit checks whether the main control unit is normally started up. The head control unit includes an operation checker to check whether the head control unit normally operates if the main control unit is normally started up and the head control unit is supplied with a check voltage, a head power supply generator to generate a voltage to be supplied to the print head if the head control unit normally operates, and a status detector to detect a status of the print head based on the voltage supplied to the print head, and control the voltage to be supplied to the head control unit depending on the status detected by the status detector.

Image forming apparatus, method of controlling image forming apparatus and storage medium

An electronic apparatus with a wireless unit includes a multiplier to receive a clock signal at a predetermined frequency. The electronic apparatus further includes a modulator configured to modulate the frequency of the clock signal generated by the multiplier, and a controller configured to change the frequency of the clock signal generated by the multiplier and a modulation rate of the modulation performed by the modulator according to a state of the electronic apparatus.

Apparatus and method for changing clock frequency and modulation method based on current state

A multi-function apparatus having a wider variety of uses and easily employed when carrying a USB cable only without having a power source cord. The apparatus includes means for detecting a connection between the USB interface and the PC, means for detecting a connection to the power line, and control means for selecting a function depending on a detected state of the connection between the USB interface and PC and a detected state of the connection to the AC power line. All the functions in the multi-function apparatus are operable in a connected state of the AC power line to the AC power source, while even in an unconnected state of the AC power line to the AC power source, if the USB interface is connected to the PC, a possible operation is enabled using electric power of 5 V at 500 mA supplied from the PC.

Multi-function apparatus and control method thereof

An object is to provide an image processing apparatus which can reduce power consumption during the power saving standby mode. The starting factor monitor unit and the power saving standby mode voltage control unit are driven with the USB bus power can be supplied during a shift to the power saving standby mode and the starting factor monitor unit and the power saving standby mode voltage control unit are driven by voltage from the main power supply when the USB bus power cannot be supplied during a shift to the power saving standby mode.

Image processing apparatus, power saving control method, and program and storage medium thereof

A photoelectric conversion apparatus includes photoelectric conversion elements configured to receive light reflected from an original illuminated by a light source and to convert the received light into an electrical signal, an output circuit for amplifying the electrical signal from the photoelectric conversion elements and outputting the amplified signal as an image signal in a time series fashion, and a driving stop circuit for stopping driving a part of the photoelectric conversion elements or a power supply stop circuit for stopping supplying power to a part of the photoelectric conversion elements.

Photoelectric conversion apparatus and image reading apparatus having power supply stop means for stopping supplying power to a part of the apparatus

A radio communication apparatus capable of executing communication and processing of audio data and image data by simplifying the system structure where various apparatuses are connected via a terminal adapter (TA), which conventionally used a large area and whose connection was complicated. More specifically, the system structure comprises: an interface unit (RS232C controller , driver , PIAFS controller , I.460 processor ) connected with a data terminal (PC) by radio or by cable; radio communication unit (PHS engine unit ) for realizing radio communication with a wireless telephone unit; and transmission arrangement (first port switch , second port switch , ISDN interface unit and the like) for transmitting at least one of the data transmitted by the data terminal (PC) or the audio data transmitted by the wireless telephone unit, to the digital public communication line (ISDN).

RADIO COMMUNICATION APPARATUS, HAVING COMBINED FUNCTIONS SUCH AS TERMINAL ADAPTER, DIGITAL RADIO COMMUNICATION APPARATUS, FACSIMILE COMMUNICATION APPARATUS AND SO ON, FOR BEING CONNECTED TO A DIGITAL PUBLIC COMMUNICATION LINE

A wireless communication apparatus includes an ISDN interface, an RF unit, and a digital phase-lock loop. When synchronization with the digital line has been established, the digital phase-lock loop counts a clock from the RF unit on the basis of the clock of the ISDN, extracted by the ISDN interface and the output of the digital phase-lock loop, and outputs a clock, so that wireless communication is performed in synchronization with the output of the digital phase-lock loop. When synchronization with the digital line has not been established, the digital phase-lock loop frequency-divides the clock from the RF unit in order to generate a synchronization clock for wireless communication.

Digital phase lock loop for wireless communication and apparatus using same

In a radio communication system with a radio control apparatus in radio communication with radio communication apparatus, a frequency hopping method is used in which the frequencies of a hopping pattern are determined by the radio control apparatus. When the frequencies of the hopping pattern are redetermined, the radio communication apparatus is intstructed to end intermittent reception and is notified of the reconfigured hopping pattern. In response to the instruction, the radio communication apparatus ends intermittent reception and shifts to a state of receiving the notification of the hopping pattern from the radio control apparatus. The frequency for performing intermittent reception is based on the relationship between the period of the notified hopping pattern and the time interval of intermittent reception. These arrangements result in reduction of the time required until the radio communication apparatus can perform frequency hopping communication and electric power consumption of the radio communication apparatuses.

Radio communication system using a frequency hopping method and a method

A voice storage device monitors wireless signals from a plurality of fixed terminals and a plurality of mobile terminals, which are connected to a main unit. When a channel establishment signal is generated by one mobile terminal, the voice storage device detects this signal, and prepares for recording the contents of a speech communication. Subsequently, the fixed terminal generates a channel assignment signal. Thereafter, the voice storage device detects a call setup signal (an ID signal and control information) exchanged between the mobile and fixed terminals, and waits for detection of a response signal which is generated by the mobile terminal and indicates that the call is answered. Upon detection of the response signal, the voice storage device starts a storage operation of voice data at a corresponding one of different storage positions in units of mobile terminals, which position is specified by the call setup signal.

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Kawasaki, Japan

Hideya Tabeta