426results about How to "Improve output stability" patented technology

A plasma processing apparatus includes a chamber for containing a substrate to be processed, a gas supply unit for supplying a processing gas into the chamber, and a microwave introducing unit for introducing plasma generating microwaves into the chamber. The microwave introducing unit includes a microwave oscillator for outputting a plurality of microwaves having specified outputs, and an antenna section having a plurality of antennas to which the microwaves outputted from the microwave oscillator are respectively transmitted.

A miniaturized laser package is provided comprising a standard semiconductor laser package modified to accept a solid state microchip assembly pumped by the diode laser. Standard packages described in the invention include TO and HHL packages all of which are characterized by small dimensions, well sealed housing, robust mounting features, known characterized materials and economical production and assembly techniques characteristic of the semiconductor processing industry. In particular, the microchip lasers are produced using high density techniques that lend themselves to mass production, resulting in very low unit costs. At the same time, the compact laser devices provide a solution to the problem of providing laser radiation at high beam quality and good reliability features with a variety of wavelengths and operational characteristics and low noise features not available from diode lasers yet relying primarily on standardized designs, materials and techniques common to diode laser manufacturing. The devices constructed according to methods taught by the invention can therefore be readily integrated into numerous applications where power, reliability and performance are at a premium but low cost is essential, eventually replacing diode lasers in many existing systems but also enabling many new commercial, biomedical, scientific and military systems.

In a laser-diode-pumped laser apparatus, a solid-state laser crystal doped with at least one rare-earth element including at least Pr3+ is pumped with a laser diode, and emits laser light. In the first aspect, the laser diode has an active layer made of one of an InGaN, InGaNAs, and GaNAs materials, and an optical wavelength conversion element converts the solid-state laser light into ultraviolet laser light by wavelength conversion. In the second aspect, the solid-state laser crystal is codoped with Pr3+ and at least one of Er3+, Ho3+, Dy3+, Eu3+, Sm3+, Pm3+, and Nd3+. In the third aspect, instead of the solid-state laser crystal, an optical fiber codoped with Pr3+ and at least one of Er3+, Ho3+, Dy3+, Eu3+, Sm3+, Pm3+, and Nd3+ is pumped with a GaN-based compound laser diode. In the fourth aspect, an optical fiber codoped with Pr3+ and at least one of Er3+, Ho3+, Dy3+, Eu3+, Sm3, Pm3, and Nd3+ amplifies incident light having a wavelength which is identical with a wavelength of fluorescence generated by pumping of the optical fiber with a GaN-based compound laser diode.

The pressure sensitive sensor includes a sheet base, an application-side and a receiving-side electrode provided on the sheet base and conducting coatings provided on the electrodes. The conductive electrodes have pressure-sensitive conductive ink containing conductive carbon black. Resistance between the application-side electrode and the receiving-side electrode changes by a contact area between the conductive coatings on the electrodes. The pressure-sensitive conductive ink has an enhanced strength as a resin and an enhanced effect of dispersion of the conductive carbon black by adding 30 to 70 parts by weight of silicon dioxide to 100 parts by weight of silicone elastomer component as a binder. The pressure-sensitive sensor has output stability and linearity at temperatures in a wide range from −40° C. to 85° C.

PROBLEM TO BE SOLVED: to realize a wide bandwidth light source capable of a stable operation providing a less spectrum variation.

SOLUTION: Optical pulses 202 outputted by this optical pulse-generating device 201 are split by optical coupler 210. The one of split optical pulses is inputted in white light-emitting device 204 to emit the white light having the wide bandwidth. The other split is inputted in optical band pass filter 212 in operation-stabilizing circuit 207. Optical detector 213 detects a signal level of a specific wavelength and input in feedback circuit 215 to generate first and second feedback signals 205 and 206. Ring resonator fiber laser 208 uses any one of them and controls a rotation angle of the waveplate to realize stabilization of the output.

An operation control method of a synchronization variable speed constant frequency wind generating set includes the strategies of AYC, synchronization control, low wind speed ceiling capacity follow control and high wind speed constant power control which includes the AYC, the synchronization control, the low wind speed ceiling capacity follow control and the high wind speed constant power control. An anemoscope and a wind vane measure the wind speed and wind direction information to generate a yaw deviation signal; a yaw motor is driven to execute left and right yaw according to the yaw direction and angle and limit the yaw velocity and meanwhile, the steering turns of the engine room are measured with the help of cables winding around a sensor, so as to execute safe untwist action, thus ensuring that the wind generating set realizes quick, accurate and safe effect of the wind wheel against wind. All the control strategies cooperate in work from the start to synchronization power generation according to the requirement of the set and external conditions, so as to ensure the safe and efficient operation of the wind generating set.

The invention discloses a shifting register and a driving method thereof as well as a gate drive circuit and a display device. The shifting register comprises an input module, a reset module, a first control module, a second control module, a first output module and a second output module. According to the shifting register disclosed by the invention, through mutual cooperation of the six modules, the electric potential of a third node for controlling the first output module is at a stable state under the action of the first control module, and the electric potential of a fourth node for controlling the second output module is at a stable state under the action of the second control module, so that the stability of a scanning signal output from a driving signal output end of the shifting register is realized, the noise of the scanning signal output from the driving signal output end is further reduced, and the output stability of the shifting register is improved.

The invention relates to the field of piezoelectric ceramic drivers, in particular to a piezoelectric ceramic driver for optical focusing and zooming of a mobile phone. The structure of the piezoelectric ceramic driver comprises a disc stator at the center, a piezoelectric ceramic plate stuck to the surface of the stator, and a mobile body in threaded fit with the stator, wherein the piezoelectric ceramic plate is of a thin ring shape, and upper and lower surface electrodes of the ring-shaped ceramic are of fan-shaped quarter shapes; and when electrical signals are introduced to the surfaces of four fan-shaped regions of the piezoelectric ceramic, continuous driving force is formed on the internal thread of the disc stator to propel the mobile body to rotate spirally relative to the stator so as to realize axial linear motion. The manufacturing process is simple and suitable for industrialized production; compared with the prior art, the piezoelectric ceramic driver is easily microminiaturized, the output performance of an executor is more stable, and the piezoelectric ceramic driver has broad application prospect in the fields of optical focusing, precision driving and micro systems. Particularly, the piezoelectric ceramic driver can realize double effects on focusing and zooming in an embedded lens of the mobile phone or a notebook computer.

The invention discloses a shifting register and a driving method thereof as well as a gate drive circuit and a display device. The shifting register comprises an input module, a reset module, a first control module, a second control module, a first output module and a second output module. According to the shifting register disclosed by the invention, through mutual cooperation of the six modules, the electric potential of a third node for controlling the first output module is at a stable state under the action of the first control module, and the electric potential of a fourth node for controlling the second output module is at a stable state under the action of the second control module, so that the stability of a scanning signal output from a driving signal output end of the shifting register is realized, the noise of the scanning signal output from the driving signal output end is further reduced, and the output stability of the shifting register is improved.

An adaptive pulse width control power conversion device includes a pulse width adjustable pulse frequency module (PFM) control circuit, a pulse width modulation (PWM) control circuit, a PWM/PFM switching unit, a switching circuit, and a load status detection circuit. When the power conversion device is to be switched from a PWM mode to a PFM mode, pulse width of a series of PFM control signals is sequentially adjusted from a low value to a high value according to a predetermined pulse width increment until an optimum pulse width is determined and thereafter, an output voltage is supplied to a load in the PFM mode, whereby ripple of output voltage in the PFM mode can be improved and improved stability of output of the power conversion device is realized.

The invention discloses a hydro-viscous speed regulation device which comprises a transmission mechanism, a control mechanism, a drive shaft transparent cover and a driven shaft transparent cover, and the hydro-viscous speed regulation device further comprises a gear sleeve and a support base, wherein the gear sleeve is fixedly connected with a drive shaft and is located at the end part of a power output end of the drive shaft, and an initiative friction plate is arranged on the gear sleeve; the support base is connected with a driven shaft and can rotate opposite to the driven shaft; the support base is located at the end part of a power input end of the driven shaft, the support base is connected with the gear sleeve, the support base and the gear sleeve enclose to form a lubricating oil cavity together, an axial oil duct of the drive shaft is communicated with the lubricating oil cavity, an axial oil duct of the driven shaft is not communicated with the lubricating oil cavity, and the lubricating oil can go between the initiative friction plate and a passive friction plate; and a working oil cavity of a piston cylinder is communicated with a second radial oil duct. According to the invention, the drive shaft is changed into a split type from an integral type to further improve a lubricating oil duct, so that the problem of eccentric wear of friction plates in the prior art is solved fundamentally.

The invention relates to an adjustable pulse width control power supply conversion method and device, wherein the device comprises an adjustable pulse width PFM control circuit, a PWM control circuit, a PWM/PFM switching unit, a switch circuit and a load state detection circuit; and before a PWM mode is switched into a PFM mode, the grade is increased by preset pulse width, the pulse width of a PFM control signal of a sequence is gradually adjusted from low to high sequentially to an optimum pulse width valve, and then the output voltage is supplied to the load by the PFM mode, so that the output voltage wave form when in the PFM mode can be improved, and the output stability of the power supply conversion device is better.

Disclosed is a method of controlling a laser apparatus, which has a laser light irradiation unit, an excitation unit including a flash lamp, a laser light shielding unit, and a control unit configured to control light shielding by the light shielding unit and release of the light shielding and control setting conditions of the flash lamp. The control unit performs a process of blocking the laser light by the light shielding unit when irradiation of the laser light is stopped, then performs a process of controlling the setting condition so that consumption of the flash lamp is reduced, performs, when the irradiation is restarted, a process of controlling the setting conditions so that the laser light is stably irradiated, and then performs a process of releasing the light shielding.