31results about How to "Reduce the number of drives" patented technology

An image forming apparatus has a black sensitized body and plural color sensitized bodies arranged in a row as well as a belt adapted to move round on a course, sequentially passing by or coming into contact with the plural sensitized bodies, of which the black sensitized body is located at an end of the row, a roll for causing the belt to come into contact with the black sensitized body and a retractable roll located between the color sensitized body disposed at the other end of the row of the sensitized bodies opposite to the black sensitized body and the color sensitized body immediately adjacent to the black sensitized body and adapted to shift from a position for holding itself in contact with the belt to a position for separating itself from the belt and vice versa to change the course of round movement of the belt.

Disclosed is a display apparatus wherein a reduction of power consumption is achieved without deteriorating the aperture ratio. A liquid crystal capacitive element (Clc) is formed by being sandwiched between a pixel electrode (20) and a counter electrode (80). The pixel electrode (20), one end of a first switch circuit (22), one end of a second switch circuit (23), and the first terminal of a second transistor (T2) form an internal node (N1). The other end of the first switch circuit (22) is connected to a source line (SL), and the other end of the second switch circuit (23) is connected to a voltage supply line (VSL). The second switch circuit (23) is configured with a series circuit composed of a transistor (T1) and a diode (D1), and the control terminal of the transistor (T1), the second terminal of the transistor (T2), and one end of a boost capacitive element (Cbst) form an output node (N2). The other end of the boost capacitive element (Cbst) is connected to a boost line (BST), and the control terminal of the transistor (T2) is connected to a reference line (REF). The diode (D1) has a rectifying behavior in the direction toward the internal node (N1) from the voltage supply line (VSL).

The present invention provides a refrigerator comprising: a cabinet having a storage chamber; a door for opening and closing the storage chamber; a case having a discharge port through which air is discharged to the storage chamber; an evaporator provided inside the case and for supplying cold air by means of heat exchange with air; a fan installed on the discharge port and for generating the airflow discharging to the storage chamber the air which has been heat exchanged in the evaporator; and a differential pressure sensor having a first pipe, of which one end is positioned on a part where the air is withdrawn to the fan, and a second pipe of which one end is positioned on a part where the air is discharged from the fan.

The invention discloses a vehicle-mounted air conditioner as well as a low power consumption standby method and circuit thereof. The vehicle-mounted air conditioner comprises an indoor unit standby circuit and a power supply circuit used for providing standby voltage to the indoor unit standby circuit to control the standby of an indoor unit, wherein the power supply circuit comprises a boosting circuit used for performing boosting adjustment on an input power supply at a preset switching frequency. The low power consumption standby method of the vehicle-mounted air conditioner comprises the following steps that a standby mode of the vehicle-mounted air conditioner is monitored; and when the vehicle-mounted air conditioner enters the standby mode, the boosting circuit is controlled to stopworking after working for first preset time according to the preset switching frequency, and restart to work after intermittently resting for second preset time. According to the vehicle-mounted airconditioner as well as the low power consumption standby method and circuit thereof, the standby power consumption of the vehicle-mounted air conditioner is reduced.

The invention relates to a light-emitting diode (LED) display panel and a driving method thereof. The panel consists of a plurality of pixels, wherein each pixel comprises an LED, a display capacitor, a diode, a first electrode, a second electrode and a third electrode. In the method, the capacitor embedded in each pixel is charged, LEDs are connected in series to form capacitive discharging current so as to emit light and an appropriate capacitance value is selected, so that the working voltage of the driving circuit can be increased, driving current is reduced and circuit loss and burden ofa driving power supply which are caused by high-current driving are reduced.

A local dimming backlight driver circuit and an electronic device, the local dimming backlight driver circuit comprising: a current sink (A); a driver power source (10); a backlight module (60), the backlight module (60) comprising multiple LED lamps arranged in a matrix; multiple power supply selector switches (40), input terminals of the multiple power supply selector switches (40) being connected to the driver power source (10); output terminals of the multiple power supply selector switches (40) being connected to anodes of the LED lamps in a one-to-one correspondence; multiple driver switches (50), an input terminal of each driver switch (50) being connected to cathodes of at least two LED lamps, and an output terminal of each driver switch (50) being grounded via the current sink (A); and a control module (30), used to drive each driver switch (50), so as to implement dimming of an LED driver module (20), control LED driver module (20) operation and control the multiple power supply selector switches (40) to turn on and off. The present local dimming backlight driver circuit decreases a number of driver ICs, lowering production costs.

A display device that realizes a reduction in power consumption without causing deterioration of an aperture is provided. A liquid crystal capacitor element (Clc) is formed by being interposed between a pixel electrode (20) and a counter electrode (80). A counter voltage (Vcom) is applied to the counter electrode (80). One terminals of the pixel electrode (20), a first switch circuit (22), and a second switch circuit (23), and a first terminal of a second transistor (T2) form an internal node (N1). The fist switch circuit (22) and the second switch circuit (23) have other terminals connected to a source line (SL). The second switch circuit (23) is configured by a series circuit of transistors (T1 and T3), and a control terminal of the transistor (T1), a second terminal of the transistor (T2), and one terminal of a boost capacitor element (Cbst) form an output node (N2). The other terminal of the boost capacitor element (Csbt) is connected to a boost line (BST), the control terminal of the transistor (T2) is connected to a reference line (REF), and the control terminal of the transistor (T3) is connected to a selecting line (SEL).

Provided is a display device capable of reducing power consumption without reducing the aperture ratio. The liquid crystal capacitive element (Clc) is formed between the pixel electrode 20 and the counter electrode (80). A counter voltage (Vcom) is applied to the counter electrode (80). The pixel electrode (20), one end of the first switch circuit (22), one end of the second switch circuit (23), and the first terminal of the second transistor (T2) form an internal node (N1). The other end of the first switch circuit (22) is connected to the source line (SL). The other end of the second switch circuit (23) is connected to the voltage supply line (VSL). The second switch circuit (23) includes a series circuit of a transistor (T1) and a transistor (T3). The second terminal of (T2) and one end of the boost capacitor element (Cbst) form an output node (N2). The other end of the boost capacitor (Csbt) is connected to the boost line (BST), the control terminal of the transistor (T2) is connected to the reference line (REF), and the control terminal of the transistor (T3) is connected to the select line (SEL).

A solenoid valve system (10A) includes a supply solenoid valve (14), a plurality of exhaust solenoid valves (16, 18), and a valve control section (126) controlling opening and closing operation of thesupply solenoid valve (14) and the plurality of exhaust solenoid valves (16, 18) using PWM or PFM. The plurality of exhaust solenoid valves (16, 18) are disposed in parallel with each other. The supply solenoid valve (14) and the plurality of exhaust solenoid valves (16, 18) have substantially identical flow rate characteristics. The number of the plurality of the exhaust solenoid valves (16, 18)is twice the number of the supply solenoid valve (14).

The invention relates to a brushless DC motor boost integrated drive system and a control method. By coupling and using switching devices, a front-stage Boost DC-DC converter topology circuit is formed to realize the voltage regulation effect on an input source; at the same time, a rear-stage is composed Three-phase full-bridge power converter topology circuit, the output voltage regulated by the front-stage Boost DC-DC converter is used as the input source of the rear-stage three-phase full-bridge power converter topology circuit, and supplies power to the brushless DC motor drive to achieve motor regulation. speed effect; the present invention not only realizes the integrated topology on the hardware circuit, but also realizes the integrated control mode on the system control method. In the field of electric vehicles, it can not only drive the electric vehicle to run, but also collect the braking energy when the electric vehicle brakes, save energy and increase the driving distance of the electric vehicle.