Abstract: A highly versatile flow-rate controller that is easy to handle and a regulator unit and a valve unit used for the same are provided. The flow-rate controller includes a regulator unit having a regulator and a first pressure sensor, a valve unit having a second pressure sensor and a flow-rate control valve, and an orifice unit that is connected to the regulator unit and the valve unit in a detachable manner and that has a fluid channel and an orifice that connect to the regulator unit and the valve unit.

Abstract: An object is to provide a flow control valve that is capable of reducing or eliminating backlash generated between a male threaded portion and a female threaded portion engaged with the male threaded portion and preventing or eliminating hysteresis in the flow level. The flow control valve includes a body having a fluid inlet and a fluid outlet, a cover attachable to the body, a motor disposed in a space defined by the body and the cover, a valving element connected to a rotary shaft of the motor with a screw member, and an urging member that urges the valving element toward the motor side or toward the side opposite to the motor.

Abstract: A valve control apparatus including a stepping motor coupled to a valve and a motor control unit for controlling the stepping motor is provided. The motor control unit includes a motor control section for applying drive pulses to the pulse motor, a counting section for counting the number of drive pulses applied to the pulse motor, a voltage-drop detecting section for detecting a voltage drop of a drive power supply for the motor control section, and a writing section for writing a count from the counting section in a nonvolatile memory if the voltage-drop detecting section detects the voltage drop.

Abstract: A compact differential-pressure flow meter with reduced wiring is provided. The differential-pressure flow meter has first and second pressure sensors 12A and 12B fixed to a base member 14 on upstream and downstream sides of an orifice member 11 along a flow channel to determine a flow rate based on a pressure difference measured between the two sides of the orifice member 11 by the pressure sensors. The differential-pressure flow meter includes specific control boards disposed near pressure-sensing parts installed in the respective pressure-sensing device and a main control board disposed in a board installation space formed inside the base member. The specific control boards are connected to the main control board with wires passing through a plurality of wiring conduits provided in housings of the pressure-sensing device, and external wiring are connected to one of the specific control boards or to the main control board.

Abstract: A heat signal writing device forming a clear writing pattern of a heat signal is provided. A heat signal writing device 10 for writing a heat signal in a medium traveling through a channel, which is secured to an appropriate position on the channel through which the medium flows, includes a Peltier element 11 for writing the heat signal having a temperature change according to a desired pattern by heating or cooling; a channel supporting member 12 shaped as a pyramid formed of a heat conductive material and having a bottom surface in close contact with a surface of the Peltier element 11, the tip of the pyramid being in direct contact with the channel 1; a heat sink 13 in close contact with another surface of the Peltier element 11; and a heat-resistant cover for covering the periphery of the Peltier element 11, excluding a channel contact surface 12a at the tip, and the channel supporting member 12.

Abstract: Provided are a flow meter and a flow-rate control system using the same that is capable of measuring a flow rate in a minute flow-rate region with excellent measurement accuracy by preventing or suppressing the generation of bubbles and in which accumulation of the fluid and the bubbles is less likely to occur.

Abstract: Provided are an orifice member, and a differential-pressure flow meter and a flow-regulating device using the orifice member, that allow purging to be carried out easily when changing the fluid to be circulated, that are less likely to cause contamination and leaching of impurities to the circulated fluid, and that can be easily produced. The flow-regulating device includes a first pressure-measuring device (object to be connected to) that is connected to one end of the orifice member, and a second pressure-measuring device (object to be connected to) that is connected to the other end of the orifice member, and a flow-regulating valve that is connected to the downstream side of the differential-pressure flow meter, which includes the above-mentioned units.

Abstract: A compact differential-pressure flow meter with reduced wiring is provided. The differential-pressure flow meter has first and second pressure sensors 12A and 12B fixed to a base member 14 on upstream and downstream sides of an orifice member 11 along a flow channel to determine a flow rate based on a pressure difference measured between the two sides of the orifice member 11 by the pressure sensors. The differential-pressure flow meter includes specific control boards disposed near pressure-sensing parts installed in the respective pressure-sensing device and a main control board disposed in a board installation space formed inside the base member. The specific control boards are connected to the main control board with wires passing through a plurality of wiring conduits provided in housings of the pressure-sensing device, and external wiring are connected to one of the specific control boards or to the main control board.

Abstract: A valve control apparatus including a stepping motor coupled to a valve and a motor control unit for controlling the stepping motor is provided. The motor control unit includes a motor control section for applying drive pulses to the pulse motor, a counting section for counting the number of drive pulses applied to the pulse motor, a voltage-drop detecting section for detecting a voltage drop of a drive power supply for the motor control section, and a writing section for writing a count from the counting section in a nonvolatile memory if the voltage-drop detecting section detects the voltage drop.

Abstract: A heat signal writing device forming a clear writing pattern of a heat signal is provided. A heat signal writing device 10 for writing a heat signal in a medium traveling through a channel, which is secured to an appropriate position on the channel through which the medium flows, includes a Peltier element 11 for writing the heat signal having a temperature change according to a desired pattern by heating or cooling; a channel supporting member 12 shaped as a pyramid formed of a heat conductive material and having a bottom surface in close contact with a surface of the Peltier element 11, the tip of the pyramid being in direct contact with the channel 1; a heat sink 13 in close contact with another surface of the Peltier element 11; and a heat-resistant cover for covering the periphery of the Peltier element 11, excluding a channel contact surface 12a at the tip, and the channel supporting member 12.

Abstract: A highly versatile flow-rate controller that is easy to handle and a regulator unit and a valve unit used for the same are provided. The flow-rate controller includes a regulator unit having a regulator and a first pressure sensor, a valve unit having a second pressure sensor and a flow-rate control valve, and an orifice unit that is connected to the regulator unit and the valve unit in a detachable manner and that has a fluid channel and an orifice that connect to the regulator unit and the valve unit.

Abstract: Provided are a flow meter and a flow-rate control system using the same that is capable of measuring a flow rate in a minute flow-rate region with excellent measurement accuracy by preventing or suppressing the generation of bubbles and in which accumulation of the fluid and the bubbles is less likely to occur.

Abstract: An object is to provide a flow control valve that is capable of reducing or eliminating backlash generated between a male threaded portion and a female threaded portion engaged with the male threaded portion and preventing or eliminating hysteresis in the flow level. The flow control valve includes a body having a fluid inlet and a fluid outlet, a cover attachable to the body, a motor disposed in a space defined by the body and the cover, a valving element connected to a rotary shaft of the motor with a screw member, and an urging member that urges the valving element toward the motor side or toward the side opposite to the motor.

Abstract: A flow rate detection method using a heat signal that enables accurate flow rate measurement by eliminating sources of measurement error is provided. The flow rate detection method, using a heat signal, of writing a temperature-change heat signal in a medium traveling through a channel and detecting the heat signal with heat signal detecting means provided at a position away from the writing position, to measure a traveling speed of the medium, wherein first and second temperature sensors 20A and 20B, which are separated by a predetermined distance L, are disposed downstream of the writing position, and the traveling speed is calculated from a time difference at which the two temperature sensors 20A and 20B detecting the heat signal and from the distance L.

Abstract: Provided is a method for driving an electroluminescence display panel in which data electrode lines and scan electrode lines cross each other with predetermined gaps to form electroluminescence cells in the crossing areas. The method includes performing a preliminary charging stage in which the signal input terminals of the data electrode lines are switched and electrically disconnected from a data driving unit, and the other terminals of the data electrode lines are switched and electrically connected to one another in the initial stage of each parallel driving period. The preliminary charging stage is performed in the following parallel driving period when the data of the present parallel driving period and the data of the following parallel driving period are different.

Abstract: Provided are an orifice member, and a differential-pressure flow meter and a flow-regulating device using the orifice member, that allow purging to be carried out easily when changing the fluid to be circulated, that are less likely to cause contamination and leaching of impurities to the circulated fluid, and that can be easily produced. The flow-regulating device includes a first pressure-measuring device (object to be connected to) that is connected to one end of the orifice member, and a second pressure-measuring device (object to be connected to) that is connected to the other end of the orifice member, and a flow-regulating valve that is connected to the downstream side of the differential-pressure flow meter, which includes the above-mentioned units.

Abstract: Provided is an apparatus for driving a display panel. The apparatus includes a main display control unit, an icon display control unit, a dot-matrix display control unit, first and second oscillators, an icon driver, and a dot-matrix driver. While the first oscillator generates a first clock signal composed of pulses having a first frequency and supplies the same to the dot-matrix display control unit, the second oscillator generates a second clock signal composed of pulses having a second frequency that is lower than the first frequency and supplies the second clock signal to the icon display control unit.

Abstract: An apparatus for driving a display panel is provided. The display panel driving apparatus includes a main display controller, an icon display controller, a dot-matrix display controller, an icon driver, a dot-matrix driver, a first DC-DC converter, and a second DC-DC converter. The first DC-DC converter boosts an input DC voltage using a coil and supplies the boosted voltage as a first boost voltage to the dot-matrix driver. The second DC-DC converter boosts an input DC voltage using a capacitor and supplies the boosted voltage as a second boost voltage to the icon driver.

Abstract: Provided is a method for driving an electroluminescence display panel in which data electrode lines and scan electrode lines cross each other with predetermined gaps to form electroluminescence cells in the crossing areas. The method includes performing a preliminary charging stage in which the signal input terminals of the data electrode lines are switched and electrically disconnected from a data driving unit, and the other terminals of the data electrode lines are switched and electrically connected to one another in the initial stage of each parallel driving period. The preliminary charging stage is performed in the following parallel driving period when the data of the present parallel driving period and the data of the following parallel driving period are different.

Abstract: An apparatus for driving a display panel is provided. The display panel driving apparatus includes a main display controller, an icon display controller, a dot-matrix display controller, an icon driver, a dot-matrix driver, a first DC-DC converter, and a second DC-DC converter. The first DC-DC converter boosts an input DC voltage using a coil and supplies the boosted voltage as a first boost voltage to the dot-matrix driver. The second DC-DC converter boosts an input DC voltage using a capacitor and supplies the boosted voltage as a second boost voltage to the icon driver.