32results about How to "Precise modulation" patented technology

This invention relates to method for marking and identifying key parts, belonging to machine manufacture and laser device, especially for condition of averting surface failure, and bearing false proof ability, such as aerial metal parts. The invention is characterized in using laser impact wave as a force source to plastic deform material, and directly plastic deform metal parts; by changing grey scale of liquid crystal mask film, energy of laser burst, burst width and shape, and flexible plaster with different sizes to attain plastic deforming force in different time and space to generate tri-dimensional plastic deformation and actualize tri-dimensional high false proof ability of marking; generating a residual compressive stress at marking area and lower surface asperity without ablating parts surface, which guarantees the non-damage of laser impact wave marking.

The present invention proposes a display device, which includes: a blue backlight source capable of emitting blue light; a display panel arranged on the light emitting side of the blue backlight source, and includes an array substrate, a liquid crystal layer, and a color filter substrate stacked in layers, Among them, the liquid crystal layer is composed of cholesteric liquid crystal and can regulate blue light, and the color film substrate includes a red color film layer, a green color film layer and a blue color film layer arranged on the same layer, a red color film layer and a green color film layer. The color film layer is a photoluminescent layer, and the red color film layer emits red light when excited by the blue light, and the green color film layer emits green light when excited by the blue light; wherein, the display device does not include upper and lower polarizers. In the display device proposed by the present invention, the liquid crystal layer formed by the cholesteric liquid crystal has a more accurate modulation effect on blue light than white light. Therefore, it is not necessary to install polarizers on both sides of the display panel, and the display device can also be adjusted. The light output is controlled, thereby greatly improving the light output efficiency of the display device.

The invention discloses an electrical connector with an adjustable phase. The electrical connector comprises an interface main body, a tail main body and a jackscrew, wherein the interface main body comprises an inner conductor, an interface main body insulator and an interface main body housing which are fixedly connected from the inside to the outside; a non-split groove end of a matching bushing is pressed into the biggest stepped hole of the interface main body housing in an interference fit manner; the biggest stepped hole of a phase modulating screw barrel is connected with an outline step of the interface main body housing in an interference fit manner, i.e., the inner conductor, the interface main body insulator, the interface main body housing, the matching bushing and the phase modulating screw barrel are fixed relative to one another; the tail main body comprises a jack, a tail main body insulator and a tail main body housing which are fixedly connected in sequence from the inside to the outside; a bushing is pressed into the biggest step hole of the tail main body housing in an interference fit manner and the tail main body insulator is axially fixed, i.e., the jack, the tail main body insulator, the tail main body housing and the bushing are fixed relative to one another; and the phase modulating screw barrel is screwed in the bushing in a threaded connection manner and the interface main body is connected with the tail main body. The inner conductor and an outer conductor always keep continuous matching of impedance in the phase modulating process.

The invention discloses a liquid crystal optical device based on a digital microscope component, which comprises a light source system, a digital microscope component, a computer control system, an imaging system, a liquid crystal layer and a liquid crystal control system, wherein the light source system is used for forming parallel light, the digital microscope component receives the parallel light and generates a plurality of beams of diffracted light, the computer control system is used for controlling the digital microscope component, the imaging system converges the diffracted light and coheres and superposes the diffracted light to form modulation figures, the liquid crystal layer receives the modulation figures, and the liquid crystal control system is used for applying driving voltage to the liquid crystal layer. The invention can modulate the liquid crystal layer accurately and quickly.

The invention discloses a multi-DC motor forward series control system and method, wherein 2*(n+1) IGBT modules are connected in series in pairs to form n+1 bridge arms; the n+1 bridge arms are connected in parallel with positive and negative poles of a DC power supply, and n DC motors which are serially connected in a forward manner are respectively connected in series with the n+1 bridge arms; the n DC motors are connected to a reference voltage synthesizer through two-stage PI controllers via a speed sensor, a current sensor and a speed adjustment module in sequence, and the reference voltage synthesizer is connected to n+1 phase inverters by a PWM pulse generating unit; the n+1 phase inverters are connected to the reference voltage synthesizer via current regulating modules and one-stage PI controllers, and are connected to the PWM pulse generating unit through the reference voltage synthesizer; and pulse control signals generated by the PWM pulse generating unit control the on / offof the 2*(n+1) IGBT modules to drive the n DC motors. The number of circuit elements is small, the structure is simple, the performance stability is reliable, and the wide use value is achieved.

The invention discloses a method for determining half-wave voltage of a phase modulator. The method comprises the steps that firstly, voltage of a phase position 0pi, voltage of a phase position pi / 2, voltage of a phase position pi, voltage of a phase position 3pi / 2 of an emitting end are calculated; secondly, voltage of a phase position 0pi, voltage of a phase position pi / 2, voltage of a phase position pi, voltage of a phase position 3pi / 2 of a receiving end are calculated; thirdly, the voltage of the phase position pi / 2 is found, the phase voltage of the emitting end of the phase modulator is stabilized to pi / 2, scanning is performed from the minimum value to the maximum value of the voltage range of the receiving end of the phase modulator, a sine curve Q2 is obtained, the corresponding position of the maximum point and the corresponding position of the minimum point of the receiving end are found through fitting, the maximum point corresponds to the voltage of the phase position pi / 2 of the receiving end, and the voltage of the phase position pi / 2 of the receiving end is B2; fourthly, whether the voltage of the phase position pi / 2 and the voltage of the phase position 3pi / 2 of the emitting end are interchanged is determined. According to the method, the half-wave voltage can be accurately calculated when the external environment is changed, and the direction of modulation can be judged. In this way, the phase position of a photon can be accurately modulated so that interference can occur at the two ends.