20 results about "Liquid crystal light valve" patented technology

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 invention discloses an intelligent liquid crystal light valve dynamic response characteristic detection device. The device comprises a base, a detection clamping assembly arranged on the surface of the base, an adjustment detection assembly arranged on the surface of the base and a data transmission assembly arranged on the surface of the base, the detection clamping assembly comprises a placement block detachably connected to the interior of the base, one end of the placement block is provided with a placement opening, and the interior of the placement opening is detachably connected with a rubber pad. An intelligent liquid crystal light valve body is connected to the surface of the rubber pad in a matched mode, a pressing plate is movably connected to the surface of the intelligent liquid crystal light valve body, the telescopic rod works to drive the pressing plate to move in the containing opening, the pressing plate clamps the intelligent liquid crystal light valve body through a sponge block connected to the bottom in a matched mode, and the overall clamping softness is improved through the sponge block and the rubber pad; damage to the intelligent liquid crystal light valve body is reduced, and the intelligent liquid crystal light valve body is convenient to clamp.

This invention provides a metal mask for silicon-based liquid crystal light valve chips, relating to the field of semiconductor optoelectronic device manufacturing technology. It includes a metal substrate and a pixel aperture array, alignment mark area, stress buffer, and reinforced border disposed on the metal substrate, adaptable to mass production evaporation and photolithography processes for LCoS light valve chips. The metal substrate consists of four layers stacked sequentially from bottom to top: a substrate layer, a molybdenum transition layer, a Mo-Ta-N functional pattern layer, and an Al2O3-SiO2 composite passivation layer. The molybdenum transition layer is deposited on the substrate surface using magnetron sputtering, with a surface roughness Ra < 0.15 nm. The Mo-Ta-N functional pattern layer is deposited on the surface of the molybdenum transition layer using reactive magnetron sputtering. The near-vertical, low-roughness aperture sidewalls of this invention result in shadow-free evaporation, uniform electrodes, and clear edges, improving the light utilization and contrast of the LCoS chip. It also increases the utilization rate of the evaporation material and reduces material loss during mass production.

The utility model relates to an electronic adjustable light reducing mirror and a shading bucket based on an electro liquid crystal light valve, the electronic adjustable light reducing mirror comprises a single-chip microcomputer chip, a modem, an operational amplifier and a light reducing mirror, the single-chip microcomputer chip is electrically connected with the modem, the modem is used for receiving a control command of a camera device, and the operational amplifier is connected with the light reducing mirror. The modem is used for processing the control command into a digital signal; the operational amplifier is electrically connected with the single-chip microcomputer chip and used for receiving a voltage driving signal generated by the single-chip microcomputer chip according to the digital signal, and the value of the voltage driving signal is sine alternating current within the range of 1-6V; the light reducing mirror comprises a liquid crystal light valve body, the liquid crystal light valve body is electrically connected with the operational amplifier, the liquid crystal light valve body comprises a plurality of liquid crystal molecules, and the arrangement mode of the liquid crystal molecules is changed according to the voltage driving signal so as to adjust the light entering amount of the light reducing mirror. According to the electronic adjustable light reducing mirror, precise light reducing control can be achieved, a traditional manual adjusting mode is replaced, the problem of color cast distortion is solved, and the optical performance is optimized.

A light engine includes a housing, an optical assembly, a heat exchange device, and a fan. A first lens, a second lens, and the housing cooperatively define a first closed chamber. The first closed chamber includes an air-cooling chamber, a first heat exchange chamber, and a second heat exchange chamber. The first heat exchange chamber and the second heat exchange chamber are arranged on opposite sides of the light converging member, respectively. The air-cooling chamber is in communication with the first heat exchange chamber and the second heat exchange chamber. The liquid crystal light valve is arranged in the air-cooling chamber. A part of the heat exchange device is located in the first heat exchange chamber and / or the second heat exchange chamber. The air blower is provided in the first heat exchange chamber or the second heat exchange chamber.

The utility model discloses a kind of mask for preparing leakproof light liquid crystal light valve and its leakproof light liquid crystal light valve, its mask is additionally increased auxiliary mask layer on the basis of original main mask layer, so that the black pattern of main mask layer and the full black film of auxiliary mask layer form double light shielding pattern, so even if the black pattern of main mask layer appears light transmission needle eye due to the limitation of printing process, the full black film of auxiliary mask layer can also effectively shield the ultraviolet light emitted by exposure machine, to avoid the appearance of light transmission needle eye on ITO glass, and further avoid the appearance of light transmission needle eye on liquid crystal light valve, prevent the appearance of leaky light bad phenomenon of liquid crystal light valve, maximumly guarantee the display blackness of liquid crystal light valve, improve the light shielding performance of liquid crystal light valve and electric welding goggles or electric welding face guard.

The invention provides a liquid crystal light valve device and a driving method. The device comprises a first substrate and a second substrate which are oppositely arranged, and the opposite surfaces of the two substrates are not provided with polyimide alignment layers; a first electrode group is arranged on one side, close to the second substrate, of the first substrate, and a second electrode group is arranged on one side, close to the first substrate, of the second substrate; a liquid crystal layer is arranged between the two substrates; and the first electrode group and the second electrode group are electrically connected with the control circuit. The control circuit can be selectively driven to generate a first-direction planar electric field or a second-direction planar electric field which are perpendicular to each other in the liquid crystal layer, so that the orientation state of the liquid crystal molecules is actively and quickly switched. By omitting a traditional polyimide alignment layer and adopting bidirectional planar electric field driving, the light valve function is realized, the preparation process is simplified, the energy consumption is reduced, and the response speed is remarkably improved.

The utility model discloses a liquid crystal projector and an optical system thereof, the optical system of the liquid crystal projector comprises a light source, a liquid crystal panel and a liquid crystal light valve located between the light source and the liquid crystal panel, and the liquid crystal light valve is stacked on the liquid crystal panel; the liquid crystal panel comprises a plurality of display units which are uniformly arranged; the liquid crystal light valve comprises a plurality of light valve units which are in one-to-one correspondence with the display units; the light valve unit is configured to transmit or cut off light emitted from the light source to the corresponding display unit; according to the projector, the problem that the contrast ratio cannot be improved by partition dimming when an LED light source is matched with an LCD display screen in an existing projector can be solved.

The present application relates to a kind of projection light machine and projection equipment.Projection light machine includes shell, optical assembly, heat exchange device and fan.First lens, second lens and shell form first closed chamber, first closed chamber includes air-cooled chamber, first heat exchange chamber and second heat exchange chamber, first heat exchange chamber and second heat exchange chamber are located at the two sides of light collector respectively, air-cooled chamber is arranged between first heat exchange chamber and second heat exchange chamber, and is communicated with first heat exchange chamber and second heat exchange chamber respectively, liquid crystal light valve is arranged in air-cooled chamber.Heat exchange device is arranged on the cavity wall of first heat exchange chamber and / or second heat exchange chamber, part of heat exchange device is located in first heat exchange chamber and / or second heat exchange chamber, fan is arranged in first heat exchange chamber or second heat exchange chamber, can improve heat dissipation efficiency.In addition, light collector is arranged in the space surrounded by first heat exchange chamber, air-cooled chamber and second heat exchange chamber, make full use of space, it is advantageous to reduce the volume of projection light machine.

This invention provides a method for aerial refueling positioning using targets and dual cameras. A microcontroller controls a target system consisting of a liquid crystal light valve, a button battery, and a reflector to actively flash light. Three targets are fixed to the refueling hose, and two targets are fixed to the receiver aircraft's fuel tank. Two cameras are mounted on the refueling aircraft to continuously photograph the five targets. Based on the camera's intrinsic and extrinsic parameters, the pixel positions of the targets in the photographs, and the target distances, linear and nonlinear equations are constructed. Solving these equations yields the three-dimensional coordinates of the five targets. Averaging these coordinates yields the coordinates of the hose center and the fuel tank center, as well as their deviation vector. Finally, the vertical vector of the hose plane is calculated using the three targets on the hose. Through decomposition, the three-dimensional error vector required for hose control is obtained, completing the error measurement during the aerial refueling process.

Disclosed is a single LCD projector structure switchable between ultra-short distance projection and medium-long distance projection including a projection module. The projection module includes an LED light source, a condenser cup, a collimating Fresnel lens, an LCD light valve and a focusing Fresnel lens arranged in sequence. The single LCD projector structure further includes a first total reflection mirror and an objective lens module including an objective lens ring and a telescopic mechanism for stretching and retracting of the objective lens ring. A single LCD projector is also provided. The objective lens is shared by ultra-short distance projection and the medium-long distance projection without changing its optical characteristics, thus the objective lens group can move rapidly in a large range and fine focusing is performed in the far end ring or the near end ring, which improves the flexibility and practicability of projection and is suitable for various application scenes.

The application discloses a terminal for wireless acquisition and real-time monitoring of operating room environment parameters. The monitoring terminal comprises a common-aperture packaging module, a multi-source energy capturing module, a sensing and logic control module, and a high-voltage direct-drive modulation module. The multi-source energy capturing module uses amorphous silicon photovoltaic panels to absorb visible light and output low-voltage direct-current electric energy, and uses a micro cantilever beam type friction nanogenerator to capture vertical laminar air supply kinetic energy and output transient high-voltage electric energy. The sensing and logic control module performs temperature and humidity sampling and differential pressure sampling and generates a digital baseband control sequence with direct-current balance characteristics. The high-voltage direct-drive modulation module directly applies the transient high-voltage electric energy to a micro-electro-mechanical system liquid crystal light valve through a photoelectric isolation interlocking switch, modulates environmental physical quantities onto a near-infrared probe light beam to form a backscattering light signal, and the system uses a diffuse reflection wall surface to construct a multipath reflection channel to overcome the blockage of a straight-line line-of-sight link caused by medical equipment.

The invention provides a shutter type liquid crystal light valve, a manufacturing method and shutter type glasses. The shutter type liquid crystal light valve comprises a liquid crystal box, two biaxial compensation films and two polaroids. The liquid crystal box comprises two glass substrates and two alignment films. The two alignment films are formed on the inner surfaces of the two glass substrates respectively, and the pretilt angle of each alignment film is 2-4 degrees. The box thickness of the liquid crystal box is 3 + / -0.2 mu m, and the liquid crystal delta n in the liquid crystal box is 0.148 + / -0.002, so that the phase delay value delta nd of the liquid crystal box is 444 + / -10nm. The two biaxial compensation films are arranged on the outer surfaces of the two glass substrates respectively, the in-plane retardation value Ro of each biaxial compensation film is 220 nm, and the retardation value Rth in the thickness direction is 440 nm, or Ro is 440 nm, and Rth is 660 nm. The shutter type liquid crystal light valve is manufactured through the shutter type liquid crystal light valve manufacturing method. The shutter type glasses comprise the shutter type liquid crystal light valve.

The utility model discloses a deepwater imaging device which comprises a waterproof shell, and sapphire glass, an optical combination module, an industrial camera, a liquid crystal spatial light modulator and a microcontroller are sequentially installed in the waterproof shell from front to back. The optical combination module comprises a front lens set, a rear lens set and a liquid crystal diaphragm, and the liquid crystal diaphragm is electrically connected with the liquid crystal spatial light modulator. Through the specially designed light path structure, the whole deepwater camera can adjust the polarization state of incident light by changing the arrangement mode of liquid crystal molecules in the liquid crystal light valve, so that backscattering noise caused by suspended particles is inhibited. The balsaming lens is utilized to reduce or eliminate chromatic aberration to the greatest extent. Therefore, the image quality is effectively improved, the reflection loss of light energy is reduced, and the imaging definition of the lens is improved.

The utility model provides an observation device for imaging of a spatial light modulator, and particularly relates to the technical field of optics, the observation device for imaging of the spatial light modulator comprises a reflection unit, a transmission unit, a switching assembly and a camera, the transmission unit comprises a first polaroid, a second polaroid, a first surface light source and a transmission placing platform; the reflection unit comprises a prism, a second surface light source arranged on one side of the prism and a reflection placing platform; a transmission type liquid crystal light valve and a reflection type liquid crystal light valve are fixed to the transmission placing platform and the reflection placing platform respectively, and the switching assembly is used for switching so that the camera can sequentially align to the first polaroid, the transmission placing platform, the second polaroid and the first area light source, or the camera can sequentially align to the prism and the reflection placing platform. According to the utility model, the switching assembly is used for switching different light paths, so that the detection of different types of liquid crystal light valves can be completed, and the superiority of different types of spatial light modulators can be judged.

The utility model discloses a laser protection auto-dimming filter and a welding mask, which belong to the technical field of laser welding filters, and comprise a filter lens group and a control circuit system, the filter lens group comprises a filter lens and a liquid crystal light valve plate, and the liquid crystal light valve plate is electrically connected with the control circuit system and is used for changing the transmittance of visible light; at least one surface of the filter is plated with a reflecting film for reflecting infrared rays, ultraviolet rays and laser; the filter is arranged close to one side of the light source, the liquid crystal light valve plate is arranged close to one side of human eyes, and the filter and the liquid crystal light valve plate are bonded into a whole. According to the utility model, laser is filtered in a reflecting manner by plating the reflecting film on the filter lens, so that the laser is prevented from entering the liquid crystal light valve to cause damage and failure of the liquid crystal light valve, and the laser filtering capability of the filter lens group is not attenuated along with time.

The invention discloses an optical element surface damage detection device based on a liquid crystal light valve and a detection method, the device adopts the liquid crystal light valve to form a programmable dynamic Fresnel lens or grating, so that an illumination light beam scans the whole surface of a sample to be detected in two dimensions in a spatial range, and optical fiber transmission and high-sensitivity detection are combined to realize measurement of element surface damage without mechanical motion. The device has the characteristics of small size and light weight, realizes on-line real-time direct detection of element surface damage after irradiation of intense laser with different emission, and provides an accurate basis for element damage state and element timely replacement.

The invention provides a three-dimensional projection system and a control method. The system comprises a light source module, a first lens, an image source selection liquid crystal light valve, an image display module and a projection module, the first lens is arranged on the light emitting side of the light source module; the image source selection liquid crystal light valve comprises at least two light-transmitting units, and each light-transmitting unit can be switched between a first light-transmitting state and a second light-transmitting state; in the first light-transmitting state, the light-transmitting unit is used for transmitting polarized light of the light-emitting beam in the preset direction. In the second light-transmitting state, the light-transmitting unit is used for shielding the light-emitting beams; the image display module is arranged on the light emitting side of the image source selection liquid crystal light valve and comprises at least two image display units, and each light transmitting unit corresponds to one image display unit. According to the scheme provided by the invention, a relatively high refresh rate of the screen can be kept on the basis of utilizing a common display screen, and the method has the characteristics of good effect and low cost.

The invention relates to the technical field of three-dimensional image display, and discloses an image crosstalk compensation device and method for a backlight modulation type naked eye three-dimensional displayer, and the device comprises a depth camera, a control unit, a liquid crystal panel, a lens array, a liquid crystal light valve and a backlight source which are sequentially stacked in the light path propagation direction. The control unit is configured to: store a crosstalk model pre-established based on optical characteristics of the device and a corresponding compensation lookup table; receiving eye position information collected by a depth camera; and generating and outputting a driving signal based on the eye position information, the binocular image data to be displayed and the brightness compensation lookup table so as to synchronously control the on-off of the backlight source, the local modulation state of the liquid crystal light valve and the gray value of the display image on the liquid crystal panel. According to the invention, the non-linear reverse compensation model is established, and the lookup table and the control unit are combined to convert the non-linear reverse compensation model into high-precision compensation capable of running in real time, so that the depth sense, definition and stability of a naked-eye three-dimensional display picture are effectively improved.