An image processing system includes a portable terminal and an image processing apparatus. The portable terminal includes a transmission processing unit that transmits each of the image data in units of the page of the document. The image processing apparatus includes a reception processing unit, a determination processing unit, and an output processing unit. The reception processing unit receives each of the image data in units of the page of the document transmitted from the portable terminal. The determination processing unit determines a page sequence of each of the image data in units of the page of the document based on each of the image data in units of the page of the document received by the reception processing unit. The output processing unit outputs each of the image data in units of the page of the document received by the reception processing unit in accordance with the page sequence.

A hardware circuit (403) outputs different output signals between a case where an operation of an operating switch (402) is continued for longer than a threshold time and the other cases. An operation detecting CPU (404) outputs different output signals between a case of having detected the operation of the operating switch (402) and the other case. A signal generating section (405) feeds a control signal for switching the power supply mode to an off mode into a power control section (401): when the hardware circuit (403) outputs an output signal different from an output signal for the case where the operation is continued for longer than the threshold time and the operation detecting CPU (404) outputs an output signal for the case of having detected the operation; or when the hardware circuit (403) outputs the output signal for the case where the operation is continued for longer than the threshold time and the operation detecting CPU (404) outputs an output signal different from the output signal for the case of having detected the operation.

A hardware circuit (403) outputs different output signals between a case where an operation of an operating switch (402) is continued for longer than a threshold time and the other cases. An operation detecting CPU (404) outputs different output signals between a case of having detected the operation of the operating switch (402) and the other case. A signal generating section (405) feeds a control signal for switching the power supply mode to an off mode into a power control section (401): when the hardware circuit (403) outputs an output signal different from an output signal for the case where the operation is continued for longer than the threshold time and the operation detecting CPU (404) outputs an output signal for the case of having detected the operation; or when the hardware circuit (403) outputs the output signal for the case where the operation is continued for longer than the threshold time and the operation detecting CPU (404) outputs an output signal different from the output signal for the case of having detected the operation.

A liquid electro-photographic printing system, comprising: a binary ink developer assembly, a power supply arrangement, a switching arrangement, and a controller. The binary ink developer assembly includes a plurality of members defining a flow path for a printing fluid containing charged particles, the plurality of members including a first member and a second member that are arranged to generate an electric field therebetween, the first member having a plurality of segments. The power supply arrangement continuously provides a supply of voltages during a print operation, the voltages including a first voltage and a second voltage having a different voltage level from that of the first voltage. The switching arrangement switches the supply of voltages to the segments of the first member on an individual segment basis, to cause charged particles to be attracted to the first member in the individual segment when the first voltage is supplied to the individual segment and to cause charged particles to be repelled from the first member in the individual segment when the second voltage is supplied to the individual segment. The controller to determine timing of when to switch the supply of voltages to the segments.

An image forming device includes: a charging unit configured to apply charging bias voltage to a charging member and charge a surface of an image carrying body; an exposure unit configured to expose the surface of the image carrying body, and form an electrostatic latent image; a developing unit configured to apply developing bias voltage to a developer carrying body, and develop the electrostatic latent image; and a control unit configured to control timing to start applying the developing bias voltage relative to timing to start applying the charging bias voltage, wherein the control unit performs control such that the larger an absolute value of the charging bias voltage is, the shorter an interval from timing to start applying the charging bias voltage to timing to start applying the developing bias voltage becomes, and such that the smaller the absolute value is, the longer the interval becomes.

An image forming device includes: a charging unit configured to apply charging bias voltage to a charging member and charge a surface of an image carrying body; an exposure unit configured to expose the surface of the image carrying body, and form an electrostatic latent image; a developing unit configured to apply developing bias voltage to a developer carrying body, and develop the electrostatic latent image; and a control unit configured to control timing to start applying the developing bias voltage relative to timing to start applying the charging bias voltage, wherein the control unit performs control such that the larger an absolute value of the charging bias voltage is, the shorter an interval from timing to start applying the charging bias voltage to timing to start applying the developing bias voltage becomes, and such that the smaller the absolute value is, the longer the interval becomes.

A series of conveyance paths to convey a recording medium is formed across a printer and a post-processing device in a printing system. The printing system includes: a detection unit that detects that the post-processing device has entered a predetermined state; and a paper feeding control unit that limits the number of recording media fed to the conveyance path, when it is not detected that the post-processing device has entered the predetermined state, based on the number of recording media conveyable to the post-processing device after the post-processing device enters the predetermined state.

A voltage level detecting device is provided including comparators, a detection circuit, a trigger signal output circuit, a delayed control signal output circuit, a delayed comparison result signal output circuit, a circuit, and a control circuit. The comparators compare a voltage level of an input signal with each threshold level to generate and output a comparison result signal. The detection circuit detects a change in the comparison result signal and outputs a detection signal. The trigger signal output circuit outputs a trigger signal when a predetermined time has elapsed. The delayed control signal output circuit outputs a delayed control signal indicating a value of the control signal. The delayed comparison result signal output circuit outputs a delayed comparison result signal indicating the value of the comparison result signal. The circuit outputs a voltage level signal indicating a voltage level of the input signal. The control circuit outputs the control signal.

A voltage level detecting device is provided including comparators, a detection circuit, a trigger signal output circuit, a delayed control signal output circuit, a delayed comparison result signal output circuit, a circuit, and a control circuit. The comparators compare a voltage level of an input signal with each threshold level to generate and output a comparison result signal. The detection circuit detects a change in the comparison result signal and outputs a detection signal. The trigger signal output circuit outputs a trigger signal when a predetermined time has elapsed. The delayed control signal output circuit outputs a delayed control signal indicating a value of the control signal. The delayed comparison result signal output circuit outputs a delayed comparison result signal indicating the value of the comparison result signal. The circuit outputs a voltage level signal indicating a voltage level of the input signal. The control circuit outputs the control signal.

A power control device includes non-volatile memory, a controller, and a logic circuit. The non-volatile memory includes a function of externally outputting a logical state of a bit stored in a specific area as a state hold signal that indicates an ON/OFF state of a device function unit before a power cutoff. The controller controls the ON/OFF state of the device function unit and also writes the ON/OFF state of the device function unit to the specific area of the non-volatile memory. The logic circuit controls power supply to the controller on the basis of a logic level of the state hold signal from the non-volatile memory.