100results about How to "Stable working current" patented technology

The invention discloses a pixel circuit and a driving method thereof, and an organic electroluminescent display panel. A driving transistor, a data writing-in module, a compensation control module, a storage module, a luminescence control module and a luminescent device are included. Through mutual cooperation of the above four modules, a work current of luminescence of the luminescent device driven by the driving transistor is unrelated to a threshold voltage of the driving transistor; an influence of drifting of the threshold voltage on the luminescent device can be avoided so that the work current used for driving the luminescent device to carry out luminescence can keep stable and uniformity of image display brightness is increased.

The invention discloses a display panel and a structure thereof, which comprise a plurality of scanning lines and a plurality of data lines. A pixel circuit is configured at the position where each scanning line is intersected with each data line. In addition, the display panel disclosed by the invention is also provided with a plurality of cathode wires, which are parallel to the scanning lines; among which, all the pixel circuits on the same scanning line are coupled with the same cathode wire and each cathode wire is coupled to a cathode voltage through a switching circuit, and various switching circuits determines whether to conduct the cathode voltage to the corresponding cathode wire according to a control signal. As the elements in the single pixel circuit are reduced, the difficulty of wiring can be lowered, the aperture ratio of the display panel can be increased, the life of the organic light emitting diode element can be extended, and the quality of the picture on the display panel can be kept. The working current in the pixel circuit is stabilized, and the service life of the pixel circuit is extended.

The invention provides a pixel circuit, a driving method of the pixel circuit, a display panel and a display device. The pixel circuit comprises a data writing module, a compensation control module, a storage module, a luminescence control module, a driver transistor and a luminous device. In the cooperation of the four modules and the driver transistor, a working current used for making the driver transistor drive the luminous device to give out light in the pixel circuit is only correlated with the voltage at the data signal end and the voltage at a reference signal end, and uncorrelated with the threshold voltage of the driver transistor and the voltage of a first power source end so that the working current flowing through the luminous device can be avoided from being affected by the threshold voltage of the driver transistor and IR Drop, accordingly the working current driving the luminous device to give out light keeps stable, and then the uniformity of screen brightness in a display area in the display device can be improved.

The present invention discloses a crystal oscillator. The crystal oscillator comprises: a crystal, an oscillating circuit, a first driving circuit, and a second driving circuit, wherein the oscillating circuit comprises a first oscillating transistor and a second oscillating transistor; the first oscillating transistor and the second oscillating transistor are used for providing transconductance for oscillation starting of the crystal and maintenance of oscillation; the first driving circuit is used for generating a stable reference current; and the second driving circuit is used for supplyingan operating voltage to the oscillating circuit, and enabling the operating current of the first oscillating transistor and the second oscillating transistor to be a stable current according to the reference current; and the operating voltage is used to control the first oscillating transistor and the second oscillating transistor to operate in a subthreshold region.

The invention discloses a pixel circuit, a driving method thereof, an organic electroluminescence display panel and a display device, comprising a data write-in module, a reset module, a first storing module, a second storing module, a light emission control module, a driving transistor and a light emitting device. For the cooperation of the above five modules, the working current of the light emitting device driven by the driving transistor in the pixel circuit can be made relevant only to the voltage of the data signal terminal and the voltage of the reference signal terminal, irrespective of the threshold voltage of the driving transistor. This can avoid the effect of the threshold voltage of the driving transistor on the working current across the light emitting device, thereby stabilizing the working current for driving the light emitting device and improving the brightness uniformity of the display area in the display panel.

The invention provides a pixel driving circuit, a driving method, a display panel and a display device.The pixel driving circuit is used for driving a light-emitting element and comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a drive transistor and a capacitor, wherein driving current provided by the light-emitting element is irrelevant to threshold voltage of the drive transistor through coordination of the transistors and the capacitor in the pixel driving circuit, so that influence on the light-emitting element is avoided, operating current of the light-emitting element is kept stable, and display brightness uniformity and good display effect of the display device are guaranteed.

The invention relates to the technical field of 3D glasses and provides an energy-saving control method of the 3D glasses. The method can be applied to the 3D glasses with a receiving unit, which comprises the following steps of: A, receiving a synchronous signal; B, judging whether the synchronous signal is valid or not, if so, leading the 3D glasses to enter a synchronous mode, leading the receiving unit to enter a dormant state, and executing the step C, and otherwise, going back to the step A; and C, capturing synchronous signals once at intervals of N synchronous cycles. By applying the invention, the capture time of the synchronous signal can be greatly shortened, the power consumption can be reduced and the product can be ensured to work stably. The method provided by the inventionis suitable for various types of active shutter type 3D glasses.

The invention discloses a self-adaptive stop control method and device for an electric air compressor. The method comprises the following steps: first, detecting the pressures of air storing tanks; then, comparing the pressure values of the air storing tanks with set air pressure values; when the pressure of the main air storing tank reaches an air pressure value required by the braking of the whole vehicle, detecting the working current of the air compressor; and when the working current of the air compressor reaches unloading current, stopping the air compressor, wherein the unloading current is a stable current value that the air compressor reaches after unloading. The precise control of the electric air compressor is realized through the process.

The invention discloses a light emitting diode (LED) lighting device having an open/short circuit protection function and a lighting circuit. The LED lighting device having the open/short circuit protection function comprises at least two light source modules, at least two LED sets, a power supply, and a plurality of protection components, wherein the LED sets are correspondingly arranged in the light source modules one by one, and each LED set forms a mutually independent loop and comprises a plurality of LEDs connected in series; the power supply is connected with and used for providing constant current electricity for the LED sets respectively; and the protection components, of which the number is corresponding to that of the LEDs, are arranged in the light source modules and used for ensuring that the open LEDs do not affect the normal work of other LEDs. The LED lighting device has the advantages of long service life and low maintenance cost.

The invention discloses an audio frequency amplifier adjunct circuit used for eliminating an emitter output stage. The audio frequency amplifier adjunct circuit used for eliminating the emitter output stage comprises a detection circuit, an amplifying circuit and an adjustable constant flow source circuit, wherein the detection circuit is composed of a diode and an audion, the diode is connected with the base of the audion, and the diode of the detection circuit generates reference voltage to compare and detect the constitution of the circuit; the amplifying circuit is used for amplifying current signals; the adjustable constant flow source circuit is used for generating adjustable constant flow currents; the detection circuit is connected with the amplifying circuit, and the amplifying circuit is connected with the adjustable constant flow source circuit. The adjunct circuit provides reference voltage and carries out comparison detection, the currents are amplified and then enter the adjustable constant flow source circuit to generate adjustable constant flow currents so that an audio amplifier can be controlled and the work voltage of an output stage of the audio amplifier can keep stable, the emitter output of the amplifying circuit is eliminated, collector output is achieved, and the interference with the output stage of the audio amplifier of a transistor by reactive potential voltage of a loudspeaker is eliminated.

The invention discloses a high-performance and energy-saving drying system for radix codonopsis medicine materials. The high-performance and energy-saving drying system for the radix codonopsis medicine materials is characterized by comprising a temperature compensating device, a baking air channel (1), an air intake channel (2), dehumidifiers (3) arranged at an air inlet of the air intake channel (2), an exhaust fan (4) arranged at an air outlet of the air intake channel (2), and the like. The temperature compensating device is formed by a control system (71), a transmission device, a heater (73) and an air blower (72); the control system (71) is formed by a control chip, a hybrid signal processing circuit, a direct-current voltage stabilizing circuit, a trilinear drive circuit, a current regulating circuit, a temperature sensor (74) and a buzzer. According to the high-performance and energy-saving drying system for the radix codonopsis medicine materials provided by the invention, a heat pump is adopted to replace a traditional electrical heating device, so that the power consumption of the high-performance and energy-saving drying system is only a quarter of the power consumption of a traditional drying device. The temperature compensating device is also arranged, so that the drying temperature stability and the drying efficiency of the system are effectively improved.

The invention discloses a triode overcurrent protection type energy-saving power supply circuit for a cold-light LED. The triode overcurrent protection type energy-saving power supply circuit is characterized by mainly comprising a control chip U2, a triode VT2, a diode withstand voltage circuit, a rectification filter circuit, a voltage-stabilization driving circuit, a current regulating circuit, a polar capacitor C5, a diode D3, and a triode overcurrent protection circuit, wherein the N pole of the diode D3 is connected with an RC pin of the control chip U2 while the P pole of the diode D3 passes through a resistor R7 and a resistor R8 and then is connected with a VREF pin of the control chip U2; and the triode overcurrent protection circuit is connected between an OUT pin of the control chip U2 and the current regulating circuit in series. The triode overcurrent protection type energy-saving power supply circuit has a super-strong withstand voltage capability, can output stable current, and can effectively ensure the stability of the luminance of a blue-light LED lamp. Compared with the existing power supply circuit, the energy consumption of the triode overcurrent protection type energy-saving power supply circuit is reduced by 55% or more.

The invention discloses a soft start current stabilization circuit, which is characterized in that it mainly consists of a transformer T, a diode rectifier U, a triode VT4, a capacitor C1, a capacitor C4, a capacitor C5, a capacitor C6, a resistor R6, a resistor R7, a resistor R8, a soft Start circuit and delay circuit. The present invention can realize the soft start of the electronic product, so that the output voltage of the present invention will rise to a given value at a slower speed through a start-up process after the power is turned on, so as to protect the electronic product from the impact of the surge when starting ; When starting, the present invention can also guarantee the optimal delay time of about 30 seconds; it is suitable for popularization and application.

The invention discloses an energy recovery and compensation device for an electric vehicle and belongs to the field of electronic devices for electric vehicles. According to the device, three high-frequency transformer compensation branches are respectively connected to three motor phase lines between an original motor of the electric vehicle and a controller; a primary coil of a high-frequency transformer is connected in series with each phase line; a capacitor is connected in parallel with the primary coil; a secondary coil of the high-frequency transformer is connected with a diode rectifier; a coupling transformer compensation branch is connected in parallel with the three motor phase lines so as to lead out three connecting lines, controls the on/off of the phase lines and a coupling transformer through a relay and is connected with the diode rectifier; and the output ends of four compensation branches are connected in parallel or in series with an original storage battery through a charging bus. According to the device, an original circuit structure of the electric vehicle is not required to be changed, and the device is easy and convenient to mount; and moreover, a regenerative brake momentary charge current of the motor can be recovered during brake and downhill, the energy is saved, and the traveled distance is approximately doubled.

The invention discloses a discrete bootstrap current amplification type energy-saving power supply for a luminescent LED. The energy-saving power supply is characterized by mainly consisting of a control chip U2, a discrete bootstrap current amplification circuit, a current detection circuit, a diode rectifier U1, a polar capacitor C1, a diode D3, a field-effect tube trigger circuit, a constant current starting circuit and a variable frequency driving circuit, wherein an N pole of the diode D3 is connected with a VFB pin of the control chip U2, and a P pole of the diode D3 is connected with a VCC pin of the control chip U2 after passing through a resistor R5 and a resistor R6 in sequence; the field-effect tube trigger circuit is connected with an OUT pin and a VREF pin of the control chip U2 respectively; the constant current starting circuit is serially connected between the VCC pin of the control chip U2 and the field-effect tube trigger circuit; and the variable frequency driving circuit is connected with the constant current starting current. The energy-saving power supply has relatively high voltage endurance capability and load capacity, stable current can be output, and the brightness stability of the luminescent LED is effectively guaranteed. The energy consumption of the energy-saving power supply is decreased by more than 55% compared with the energy consumption of an existing power supply circuit.

The invention relates to the technical field of adsorbent related gas adsorption and desorption, in particular to a liquid adsorbent testing method. A liquid adsorbent testing device comprises a microbalance, a suspension rod, an electromagnet, a testing cavity, a vent port I, a permanent magnet, a steel wire, a displacement sensor, an induction coil, a standard sample, a support I, a tray I, a bracket, a tray II, a support II, a connection tube, a sample cavity, a gas tube I, a gas tube II, a vent port II, a light source, a camera, a divider resistor, a direct-current power source, a feedbackcircuit, a computer and a displacement stage. By combination of the simple-structure feedback structure and the direct-current power source, stable current is provided for the electromagnet so as toreduce errors in an adsorbent weighing process and improve accuracy of results. By adoption of a special gas inlet structure, the shape of a single bubble in a liquid adsorbent can be observed and recorded, application to research on interaction between gas and the liquid adsorbent is realized, and the liquid adsorbent research can be realized according to a weighing method.