265 results about "Light valve" patented technology

The invention relates to a gray dye composition, which consists of at least one yellow dichroic dye, at least one red dichroic dye, at least one purple dichroic dye and at least one blue dichroic dye, and has uniform total absorption in a visible light region when being mixed with a parent liquid crystal composition for use. The liquid crystal composition has high contrast when applied to light valves, switchable windows, switchable mirrors and guest-host displays.

A static-image augmented privacy display, mode-switchable privacy display system, and method provide a private image to a first view zone and a static image to a second view zone. The static-image augmented privacy display includes a privacy backlight configured to provide directional emitted light to the first view zone and an array of light valves configured to modulate the directional emitted light to provide a private image within the first view zone. The static-image augmented privacy display also includes a static display layer configured to provide a static image in a second view zone. The mode-switchable privacy display includes a broad-angle backlight configured to provide broad-angle emitted light to both a first view zone and a second view zone during a shared mode, a shared image being provided by modulation of the broad-angle emitted light using the light valve array.

The invention discloses a laser depilation dynamic parameter adjustment method based on skin typing recognition, and relates to the technical field of laser depilation, and the method comprises the steps: constructing a three-dimensional skin model of a depilation region through multi-dimensional data cross validation; detecting local pigmentation caused by friction in each area; detecting the blood flow signal intensity of capillary vessels around the hair follicles, judging the period of the hair and generating a hair follicle activity thermodynamic diagram in real time; a three-dimensional energy focus is formed through double-beam crossing; skin curved surface data are obtained through a pressure sensor, liquid crystal molecules in a light valve are driven to be arranged, and light spots are adjusted to be in the shape attached to an unhairing area; the basal metabolic rate of the patient is measured through a noninvasive bioelectrical impedance analysis technology, and the energy density is adjusted based on the basal metabolic rate; and establishing a digital twinborn model, and integrating depilation data, skin state and hormone level information. A three-dimensional energy focus is formed through double-beam crossing, energy is accurately focused on the root of the hair follicle, and epidermis damage is avoided.

The invention relates to the technical field of virtual reality optical systems, and discloses an optical system control method for reducing VR dynamic blurring, which comprises the following steps: arranging an independent liquid crystal light valve in a light path of a display panel, and judging the motion state of a user according to the motion angular velocity of the head of the user acquired by an inertial measurement unit; when the display panel is in the static micro-motion state, the light valve is controlled to be continuously opened, and when the display panel is in the dynamic operation state, the light valve is controlled to execute one-time pulse type switching operation in each frame display period, the image generation function and the time domain luminous flux control function are structurally separated, so that the display panel can concentrate on efficient imaging; and meanwhile, the external light valve accurately inhibits dynamic blur, the inherent contradiction between power consumption and brightness in the prior art is effectively avoided, and the environmental adaptability of the system and the comprehensive experience of a user can be remarkably improved through closed-loop self-calibration and multi-sensory cooperative control.

A head-tracking multi-view display includes a multi-beam backlight that provides a plurality of light beams having different principal angular directions corresponding to different view directions of a multi-view image. A processor receives a plurality of provisional views of the multi-view image. The provisional views correspond to different view directions. The processor receives information regarding a tracking position of a user. The processor shifts the provisional views with respect to the view directions to form a plurality of shifted views corresponding to different view directions. The shifted views vary as a function of the tracking position of the user and are shifted by a shift value that varies across the field of view of the multi-view image. A light valve array modulates the plurality of light beams to provide the plurality of shifted views of the multi-view image in the view directions as the multi-view image.

The invention relates to the technical field of image projectors, in particular to a multi-dimensional light path self-adaptive adjustment control method and system for an image projector, and the method comprises the steps: obtaining multi-path real-time light path parameters, carrying out aberration noise covariance estimation to generate an aberration matrix, and generating a light path crosstalk matrix through crosstalk analysis; predicting light path change based on the aberration matrix and the crosstalk matrix to construct a multi-dimensional light path simulation model; carrying out light valve duty ratio calculation on the model to obtain a basic driving sequence, and generating an anti-crosstalk driving sequence through dead zone compensation; performing phase quantization and peak shifting distribution on the anti-crosstalk driving sequence to obtain a peak shifting control sequence; and performing temperature and ambient light compensation on the off-peak control sequence, generating a temperature compensation driving sequence, performing multi-light path cooperative processing to obtain a multi-dimensional control sequence, collecting feedback light intensity and aberration data, optimizing a simulation model, and realizing multi-dimensional light path adaptive adjustment. The problems that a traditional manual adjusting method is slow in response and poor in environmental adaptability are solved.

The invention relates to the technical field of optical imaging systems, and discloses a projection zoom optical system, which sequentially comprises a light valve, a prism group, an image bias lens, a first group lens, a second group lens, a third group lens, a fourth group lens, a fifth group lens and a sixth group lens from an image source side to a projection side along an optical axis, the first group lens is composed of a first lens with positive focal power, the second group lens is composed of a second lens with positive focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with positive focal power, the third group lens is composed of a diaphragm and a sixth lens with positive focal power, and the fourth group lens is composed of a seventh lens with positive focal power. The fifth group lens is composed of an eighth lens with positive focal power and a ninth lens with negative focal power, and the sixth group lens is composed of a tenth lens with negative focal power and an eleventh lens with negative focal power, so that the performance of the zoom lens can be improved at lower cost and lower complexity; and meanwhile, the quality and definition of a projected image can be improved.

A projection device disclosed by the present invention comprises a support, a ray machine assembly and a water cooling system, the ray machine assembly comprises a light valve shell and a light valve, the light valve is installed in the light valve shell, and a water flow channel communicated with the water cooling system is arranged in the support. A first heat dissipation face is formed on the outer surface, corresponding to the position of the water flow channel, of the support, and the light valve shell is connected with the first heat dissipation face. According to the projection equipment provided by the invention, heat of the light valve shell can be quickly dissipated, and adverse effects on the light valve are avoided.

The application provides a light valve dimming film and a preparation method and application thereof. The dimming film comprises a suspension and a base polymer, the suspension comprises an acrylic polymer and dimming particles, and the base polymer is selected from an epoxy resin; the mass ratio of the dimming particles, the acrylic polymer and the epoxy resin is (0.1-5):100:200-350. The dimming film uses the epoxy resin as the base polymer, the acrylic polymer in the suspension can be dispersed into the epoxy resin in the form of small droplets with micron-level size, a phase separation state is formed, and the particle sedimentation problem is improved; meanwhile, the two polymers have similar refractive indexes, so that the prepared dimming film has good transparency. In addition, the size of the droplets in the dimming film is more conducive to the flipping of the dimming particles, so that the light transmittance is improved, and the performance of an SPD device is improved.

An apparatus includes at least one laser source and a print bed. A light valve array having at least three optically addressable light valves is positioned to direct differing images at the print bed. Optics to direct multiple beams derived from the at least one laser source can be positioned to direct light toward and from the optically addressable light valves.

Provided in the present invention is a split-screen projection device. The split-screen projection device comprises: a projection lens module which sequentially comprises, from a first side to a second side, a plurality of lenses having diopters and an imaging light valve; and a light-splitting module located on the first side of the projection lens module and disposed on an optical axis of the projection lens module, wherein the light-splitting module has a plurality of reflecting surfaces, the plurality of reflecting surfaces reflect light in different directions, and the plurality of reflecting surfaces are configured to receive projection light of the projection lens module and reflect the received projection light to different positions to form a plurality of projection images. The present invention solves the problems in the prior art of split-screen projection devices having a complex structure and a poor imaging quality.

The invention discloses a circuit board system and laser projection equipment, and belongs to the field of laser projection. The invention provides a circuit board system. The circuit board system comprises a power panel, a light source driving module and a control module, the control module comprises a first circuit board, a first control circuit and a digital light processing DLP chip, and the first circuit board and the power panel are separately arranged; the light source driving module comprises a second circuit board and a laser. The DLP chip and the DMD light valve are both located on the first circuit board in the control module, and it can be guaranteed that the probability that the control signal sent by the DLP is interfered is low. And when the form of the laser in the laser projection equipment needs to be replaced, only the light source driving module needs to be replaced, so that the research and development cost and the production cost of the laser projection equipment can be reduced.

The present application relates to a kind of thin ventilation skylight systems for factory, which is installed on the support beam arranged at the top of factory;It is characterized by including waterproof groove, rain baffle, waterproof groove compression frame, support plate, communication rod, light valve plate, buckle unit and valve plate drive module;Using a flat panel to carry out die stamping forming, it can realize modular mass production, and high production efficiency, and no pre-assembly is needed;After completing stamping forming, only bending operation is needed, the forming of product can be realized, and it can be installed directly across the waterproof groove;Buckle unit connection disassembly operation is more convenient, and installation efficiency is improved;Communication rod is connected on each support plate, and the communication rod arranged above and below is used to install rain baffle structure, and staggered arrangement of cloth baffle can guide rainwater into waterproof groove on one hand, and it is also convenient for light to pass through light valve plate for lighting;Valve plate drive module can drive light plate to open and realize ventilation.

The present invention relates to the technical field of instruments and meters, and particularly relates to a combined instrument, which includes a housing, a circuit board, a bracket, a TFT screen and a segment code screen. The bracket is fixedly connected to the housing; the circuit board is fixed between the housing and the bracket; the TFT screen is fixed on the bracket. The segment code screen is arranged outside the TFT screen, and the light valve areas of the TFT screen and the segment code screen are arranged opposite to each other; the segment code screen is fixedly connected to the bracket. A microcontroller, a first control circuit and a second control circuit are integrated on the circuit board; the microcontroller is electrically connected to the first control circuit and the second control circuit; the first control circuit is connected to the LED module of the TFT screen; the second control circuit is connected to the LED module of the segment code screen. The combined instrument provided by the present invention makes the brightness and color of the TFT screen and the segment code screen tend to be consistent, realizes the overall consistency of the TFT screen and the segment code screen, and enhances the display effect.

The present invention relates to an energy-efficient light valve comprising an LC material which is switchable between an optically transparent state and an opaque state and to the use of the light valve in spatial light modulators for handling occlusion in near-eye displays.

The application discloses an optical engine module and a laser projection device, and belongs to the laser projection field.The optical engine module comprises a light source assembly, a prism assembly, a light valve assembly and a lens assembly, wherein the light valve assembly at least comprises a first light valve and a second light valve, the prism assembly is used for guiding the incident light corresponding to each light valve to the corresponding light valve respectively, and guiding the light beams output by each light valve to the lens assembly, the image light beams output by the first light valve and the image light beams output by the second light valve are dislocated at the irradiation position of the lens assembly, so that the resolution of the image picture projected by the lens assembly can be improved without setting a vibrating mirror, the structural components of the optical engine module are less and the volume of the optical engine module is small, the problem that the components of the optical engine module are more and the volume of the optical engine module is large in the related art can be solved, and the effects of simplifying the structure of the optical engine module and reducing the volume of the optical engine module are achieved.

The invention discloses a laser powder bed sheet pattern distortion real-time correction system and method based on a phase type light valve, and relates to the technical field of metal additive manufacturing. The system comprises a polarization laser, a beam expanding and collimating unit, a reflecting mirror, a phase-type spatial light modulator, a reflecting mirror, a relay optical system, a galvanometer / field lens system, a movable spectroscope, a reference plane mirror and a forming cylinder. A double-loop correction system with a position sensitive detector as an absolute reference and a wavefront sensor as direct feedback is constructed, information of the position sensitive detector and the wavefront sensor is unified in a phase domain through a frequency domain fusion algorithm, and a comprehensive compensation phase diagram capable of completing pattern generation and distortion correction at the same time is generated. And loading to a phase type light valve to carry out high-power laser patterning modulation, and melting metal powder of a powder bed.

The present invention discloses a grating light valve type current sensor based on temperature compensation, which includes a signal processing unit and a sensing unit. The sensing unit is a three-beam grating light valve temperature-current sensing unit based on micro-optoelectromechanical system technology. The grating light valve based on micro-optoelectromechanical system technology is used to measure the two parameters of temperature and current, and according to the detected temperature information, the current measurement error introduced by the change of the grating light valve with temperature is corrected to meet the accurate current measurement requirements in the outdoor engineering application process. At the same time, a closed-loop control modulation and demodulation algorithm based on square wave + stepped wave is adopted to improve the linearity and dynamic measurement range of current measurement.

The present invention relates to a laser selective melting (SLM) forming device based on dynamic surface exposure. The device comprises a diode laser array homogenizing light unit, a light-addressable light valve imaging unit, and a light source deflection imaging unit, all arranged sequentially along the laser light path. The diode laser array homogenizing light unit is used to emit multiple groups of laser light and homogenize them into a surface light source. The light-addressable light valve imaging unit is used to separate the surface light source into S-polarized light and P-polarized light. The light source deflection imaging unit is used to dynamically adjust the projection position of the S-polarized light to expand the SLM forming area. This SLM forming device based on dynamic surface exposure aims to address the problem that SLM forming based on surface exposure cannot meet the requirements for forming large parts due to the limited exposure range of the surface light source.

A projection system includes projection devices and a control device. Each projection device is configured to provide first, second, and third light beams of different wavelengths. The projection devices include processors and light valves. The processors include first, second, and third processors. The light valves include first, second, and third light valves. Each of the processors is connected to one of the light valves. The control device respectively provides first, second, and third signals to the first, second, and third processors. The first, second, and third processors respectively control the first, second, and third light valves to provide the first, second, and third light beams in turn according to the first, second, and third signals, so as to generate an image beam; in the same time sequence, the light beams provided by the first, second, and third valves controlled by the first, second, and third processors have different wavelengths.

The present application discloses a projection device, belonging to the field of optoelectronic technology. The projection device includes a light source, a light valve, and a lens, a first convex lens, a first diffuser, a second convex lens, and a light homogenizing component located in the light path between the light source and the light valve; the focal points of the first convex lens and the second convex lens coincide with each other, and the coincident focal point is located between the first convex lens and the second convex lens; the first diffuser is located at the focal point; the first convex lens is used to converge the light emitted by the light source to the first diffuser, the first diffuser is used to expand the divergence angle of the incident light and then direct it to the second convex lens, the second convex lens is used to direct the incident light to the light homogenizing component, and the light homogenizing component is used to homogenize the incident light and then direct it to the light valve, and the light spot area on the first convex lens is larger than the light spot area on the second convex lens. The present application solves the problem of poor display effect of the projection screen of the projection device. The present application is used for projection.

The application discloses a preparation method of a black electrically controlled light valve film based on nano SiC particles, and comprises the following steps: taking silica powder, graphite powder and NaCl-KCl with a mass ratio of 1:(2-5):(4-8) as raw materials to prepare rod-like SiC, wherein the molar ratio of NaCl to KCl is 1:(0.5-2); using a dopamine hydrochloride solution to modify the rod-like SiC to prepare black rod-like SiC@ dopamine powder; using oleic acid to modify the rod-like SiC@ dopamine to prepare modified black nano rod-like SiC powder; dispersing the modified black nano rod-like SiC powder in a dispersing agent, adding a stabilizer to prepare a black dispersion liquid; providing silica gel, uniformly mixing the black dispersion liquid with the silica gel to prepare a coating material; coating the coating material on the ITO surface of one ITO-PET conductive film and performing drying treatment to form a coating layer, oppositely arranging the ITO surface of the other ITO-PET conductive film to the coating layer and performing pressing treatment to prepare a black electrically controlled light valve film. The application can be electrically controlled to switch between colorless transparent and black transparent states, and meets the sunshade requirements of a vehicle regulation.

A projection device includes an illumination system, a light valve, a projection lens, and first and second actuation modules. The illumination system is used to provide an illumination beam. The light valve is arranged on the transmission path of the illumination beam to convert the illumination beam into an image beam. The projection lens is arranged on the transmission path of the image beam to project the image beam out of the projection device. The first actuation module is connected to the first element, and the image beam is translated back and forth along at least one of the first direction, the second direction, and the third direction by moving the first element; and the second actuation module is connected to the second element, and the image beam is translated back and forth along at least one of the first direction, the second direction, and the third direction by moving the second element. The first direction and the second direction are perpendicular to each other, the third direction is at a 45-degree angle to the first direction, and the third direction is at a 45-degree angle to the second direction. The first element is different from the second element. The projection device can provide a high-resolution projection image.

The application discloses a closed-loop control direct-current fiber current sensor, which comprises a grating light valve type fiber direct-current current sensor and a polarization interference type fiber temperature sensor; the polarization interference type fiber temperature sensor and the sensing head of the grating light valve type fiber direct-current current sensor are integrated in the same shell; the temperature at the primary sensing head of the grating light valve type fiber direct-current current sensor is measured through the polarization interference type fiber temperature sensor; error correction is carried out according to the measured temperature information; and the influence of the environmental temperature change on the measurement accuracy of the grating light valve type fiber direct-current current sensor is corrected. Meanwhile, the micro-power light control signal source technology is adopted to realize the closed-loop light feedback control of the grating light valve type fiber direct-current current sensor, the measurement linearity of the grating light valve type fiber direct-current current sensor is improved in the closed-loop demodulation algorithm, and the dynamic measurement range is increased.

The application relates to an illumination display device and an illumination display method. The illumination display device comprises light source modules and light valve modules arranged in sequence along a first direction; the light valve modules are configured to generate a plurality of corresponding light transmission patterns according to a plurality of preset projection images; the light source modules are configured to be partially turned on according to the plurality of preset projection images to generate a plurality of corresponding backlight light sources, the light transmission pattern and the backlight light source generated according to the same preset projection image correspond to each other, the backlight light source propagates along the first direction, and the light transmission pattern is located in the irradiation range of the corresponding backlight light source; the light source modules generate corresponding backlight light sources according to the preset projection image to be formed; the light valve modules generate corresponding light transmission patterns according to the preset projection image to be formed; and the backlight light source passes through the light transmission pattern to form the corresponding preset projection image. The illumination display device can effectively reduce energy consumption and heat generated in the operation process while ensuring the illumination brightness.

The present application provides an image processing method, a recording medium and a projector, which can easily correct uneven brightness. An image processing method of a projector (1) or a portable terminal device (5) which displays an image modulated by a liquid crystal light valve (23), comprising: displaying an image (D1); displaying an adjustment bar (B3) or an adjustment bar (SB3) corresponding to a first brightness at a first position of the image (D1); moving the adjustment bar (B3) or the adjustment bar (SB3) from the first position to a second position along a first axis of the image (D1); and generating an image (D2) as a second image having a range corresponding to the second position of the image (D1) and intersecting the first axis, and having the first brightness.

The detection system of an x-ray or charged particle imaging system utilizes a high bandgap, direct conversion x-ray detection material. The signal of the x-ray / charged particle projection is recorded in a spatial light modulator, for example a liquid crystal (LC) light valve. The light valve is then read out by a polarized light optical microscope and a high speed camera. The camera is used to track the halo in the light valve to resolve its intensity and correlate it to the intensity of the incoming x-ray photons or charged particles. This allows for a spatially resolved imaging with an x-ray and / or charged particle spectrometer.

The utility model discloses a display module. The display module comprises a circuit board with a backlight unit, a first polarizer, a light valve and a front cover plate which are sequentially stacked, wherein an icon is printed on the first polarizer, the icon and the backlight unit are correspondingly arranged, and the backlight unit is used for illuminating the icon; the light valve is used for adjusting polarized light which comes from the backlight unit and passes through the first polarizer so as to control the display state of the icon. The icon is arranged on the first polarizer, and the light for illuminating the icon is controlled by the light valve, so that the dynamic display effect of the icon can be realized, the structure of the display module is simplified, and the cost is saved.

A lighting system and method controls light to prioritize different elements of a light beam output by a luminaire. An LCD surface acts as a color occlusion filter that provides pixel-level control over the light beam transmitted by the layer. An internal LED light source is projected perpendicular to a concave reflector that can be moved on an axis, thereby scaling to widen or narrow the light that is emitted forward as a light beam. The system also includes certain cooling features.

The application relates to the technical field of virtual reality optical systems, and discloses an optical system control method for reducing VR dynamic blur, which comprises the following steps: arranging an independent liquid crystal light valve in the light path of a display panel, and determining the motion state of the user according to the head motion angular velocity obtained by an inertial measurement unit; when being in a static micro-motion state, the light valve is controlled to be continuously opened; and when being in a dynamic operation state, the light valve is controlled to perform a pulse type switching operation once in each display cycle; the application separates the image generation and the time domain light flux control function in structure, so that the display panel can be focused on efficient imaging, and the dynamic blur can be accurately inhibited by the external light valve; the design effectively avoids the inherent contradiction between power consumption and brightness in the prior art, and can significantly improve the environmental adaptability and the comprehensive experience of the user through closed loop self-calibration and multi-sensory collaborative control.