412 results about "Liquid crystal light valve" patented technology

The invention is a seamless projection lithography system that eliminates the need for masks through the use of a programmable Spatial Light Modulator (SLM) with high parallel processing power. Illuminating the SLM with a radiation source (1), which while preferably a pulsed laser may be a shuttered lamp or multiple lasers with alternating synchronization, provides a patterning image of many pixels via a projection system (4) onto a substrate (5). The preferred SLM is a Deformable Micromirror Device (3) for reflective pixel selection using a synchronized pulse laser. An alternative SLM is a Liquid Crystal Light Valve (LCLV) (45) for pass-through pixel selection. Electronic programming enables pixel selection control for error correction of faulty pixel elements. Pixel selection control also provides for negative and positive imaging and for complementary overlapping polygon development for seamless uniform dosage. The invention provides seamless scanning by complementary overlapping scans to equalize radiation dosage, to expose a pattern on a large area substrate (5). The invention is suitable for rapid prototyping, flexible manufacturing, and even mask making.

A project is provided that includes a light source including three light emitting units in which a plurality of LEDs are disposed and which emits red light, green light, and blue light. A liquid crystal light valve is provided that modulates the red light, the green light, and the blue light emitted from the light source. The projector is constructed so as to be capable of projecting and displaying an image on a screen by projecting the light modulated by the liquid crystal light valve onto the screen. The light source is constructed with one out of the light emitting units including a different number of LEDs than the other light emitting units so that a ratio between respective amounts of red light, green light, and blue light incident on the liquid crystal light valve with all of the LEDs lit satisfies a predetermined condition.

The invention relates to a separated field emission display device, which comprises a glass basic plate and the three primary colors fluorescent powder and aluminum film mounted on the glass basic plate. Wherein, there is a sealed vacuum chamber between the glass basic plate and the ITO glass basic plate; the aluminum film and the ITO glass basic plate are individually connected to the anode and cathode of direct current and high voltage; the ITO glass basic plate is plated with a photo-electric cathode array; the liquid crystal light valve is mainly formed by a upper ITO glass basic plate with directional layer, a liquid crystal layer and a lower ITO glass basic plate with directional layer, while the lower end of said liquid crystal light valve has a negative light source of light-emitting diode. The invention uses the electric beam to impact the fluorescent powder, the liquid crystal light valve and the negative light source, therefore, it has the energy saving, portable and better display properties of CRT and plane display, and compared to the surface conductive electric emitting display, it can avoid the preparation of nanometer slit to reduce the difficulty of technique and process.

Laser lines at 635 nm or longer (ideally 647 nm) are preferred for red, giving energy-efficient, bright, rapid-motion images with rich, full film-comparable colors. Green and blue lines are used too—and cyan retained for best color mixing, an extra light-power boost, and aid in speckle suppression. Speckle is suppressed through beam-path displacement—by deflecting the beam during projection, thereby avoiding both absorption and diffusion of the beam while preserving pseudocollimation (noncrossing rays). The latter in turn is important to infinite sharpness. Path displacement is achieved by scanning the beam on the liquid-crystal valves (LCLVs), which also provides several enhancements—in energy efficiency, brightness, contrast, beam uniformity (by suppressing both laser-mode ripple and artifacts), and convenient beam-turning to transfer the beam between apparatus tiers. Preferably deflection is performed by a mirror mounted on a galvanometer or motor for rotary oscillation; images are written incrementally on successive portions of the LCLV control stage (either optical or electronic) while the laser “reading beam” is synchronized on the output stage. The beam is shaped, with very little energy loss to masking, into a shallow cross-section which is shifted on the viewing screen as well as the LCLVs. Beam-splitter / analyzer cubes are preferred over polarizing sheets. Spatial modulation provided by an LCLV and maintained by pseudocollimation enables imaging on irregular projection media with portions at distinctly differing distances from the projector—including domes, sculptures, monuments, buildings; waterfalls, sprays, fog, clouds, ice; scrims and other stage structures; trees and other foliage; land and rock surfaces; and even assemblages of living creatures including people.

The invention provides a display device and a projector that can improve display performance with a simple structure without accompanying the enlargement of the device. The display device of the invention can include an illumination system capable of outputting a plurality of primary color light components having different luminescent colors and liquid crystal light valves for modulating the primary color light components output from the illumination system, and the illumination system can adjust the emission spectra of the primary color light components. A light-emitting device of each light controls outputs therefrom independently.

Organic light-emitting diodes (OLEDs) that produce white light include an anode, a hole-transporting layer disposed over the anode, a blue light-emitting layer disposed over the hole-transporting layer, an electron-transporting layer disposed over the blue light-emitting layer, and a cathode disposed over the electron-transporting layer. The hole-transporting layer is doped with both a yellow-emitting and a red-emitting dopant. When used together with red, green, and blue color filters, the OLEDs produce red, green, and blue light with good color quality and high efficiency. Also disclosed are multicolor display devices utilizing the OLEDs together with color filters or together with both color filters and liquid-crystal light valves.

A projection-type display device 1 including a light source 10, an optical integrator 20, dichroic mirrors 30 and 35, a reflecting mirror 36, a relay optical system 40, parallelizing lenses 50B, 50G and 50R, liquid crystal light valves 60B, 60G and 60R, incident side lenses 70B, 70G and 70R, a light-synthesizing cross dichroic prism 80, a relay lens 90, an emergent side lens 95, a liquid crystal light valve 100 and a projection lens 110, and liquid crystal light valve 100 is provided in the rear stage of liquid crystal light valves 60B, 60G and 60R.

The invention relates to strapping inertia / astronomical combination navigation semi-physical simulation system. It includes strapping inertia subsystem, astronomical subsystem, combination navigation terminal, trace generating terminal, demo verification and evaluation terminal. The trace generation terminal is used to form nominal trace data which introduces into astronomical subsystem and combination navigation terminal as information processing reference source. The astronomical subsystem is made up of ARM +liquid crystal light valve star map simulator and CMOS sensor +DSP star sensor. The combination navigation terminal is realized by DSP and used to receive the output data. The control terminal is used to realize demo verification and evaluation. The invention can effectively reduce experimentation cost and lead time. Thus, it has great theory and practice meanings for the combination navigation system dynamic performance study and engineering application.

The present invention discloses a new-type laser color display device. It has time sequence controller module, red light laser, green light laser, blue light laser, decoherer, liquid crystal light valve, light valve drive circuit and lens system. Besides, said device also includes the components, of light modulator, reflector, beam-combining prism, beam-expanding prism and display screen. Said invention also provides the connection mode of all the above-mentioned components, and the working principle of said laser color display device.

A projector includes a liquid crystal light valve to which first image data and second image data are alternately written and a polarization switching device that has a plurality of switching areas and switches a polarization state between a first polarization state and a second polarization state for each of the switching areas. A boundary position between a switching area that provides the first polarization state and a switching area that provides the second polarization state moves in synchronization with a boundary position between an area where the first image data is written and an area where the second image data is written.

A liquid crystal display-element which has the high speed response and the high contrast and a display device employing the same are provided. In a display device employing a reflection type liquid crystal light valve, a retardation of a retardation plate which is provided between a polarizing element such as a polarizing beam splitter and the reflection type liquid crystal light valve is generally made ¼ of the wavelength of the incident light, and an optical axis (a slow axis or a fast axis) of the retardation plate and the polarizing direction of the incident polarized light are shifted from each other by slightly larger than 0 degree in order to arrange such optical elements.

Laser lines at 635 nm or longer (ideally 647 nm) are preferred for red, giving energy-efficient, bright, rapid-motion images with rich, full film-comparable colors. Green and blue lines are used too—and cyan retained for best color mixing, an extra light-power boost, and aid in speckle suppression. Speckle is suppressed through beam-path displacement—by deflecting the beam during projection, thereby avoiding both absorption and diffusion of the beam while preserving pseudocollimation (noncrossing rays). The latter in turn is important to infinite sharpness. Path displacement is achieved by scanning the beam on the liquid-crystal valves (LCLVs), which also provides several enhancements—in energy efficiency, brightness, contrast, beam uniformity (by suppressing both laser-mode ripple and artifacts), and convenient beam-turning to transfer the beam between apparatus tiers. Preferably deflection is performed by a mirror mounted on a galvanometer or motor for rotary oscillation; images are written incrementally on successive portions of the LCLV control stage (either optical or electronic) while the laser “reading beam” is synchronized on the output stage. The beam is shaped, with very little energy loss to masking, into a shallow cross-section which is shifted on the viewing screen as well as the LCLVs. Beam-splitter / analyzer cubes are preferred over polarizing sheets. Spatial modulation provided by an LCLV and maintained by pseudocollimation enables imaging on irregular projection media with portions at distinctly differing distances from the projector—including domes, sculptures, monuments, buildings; waterfalls, sprays, fog, clouds, ice; scrims and other stage structures; trees and other foliage; land and rock surfaces; and even assemblages of living creatures including people.

The invention relates to a method and a device of laser direct writing machining and belongs to the technical field of laser machining. The device is a laser machining device which comprises a laser light source, a reflector group, a front reshaping lens group, a liquid crystal light valve, a rear reshaping lens group, a focusing lens, materials to be processed and a reflector or a multi-surface rotating reflector. The laser light source is used to generate laser to be machined, after beams of the laser to be machined are expanded by the front lens group, the laser is reshaped by the liquid crystal light valve, and then the beams of the laser to be machined are expanded by the rear lens group and the laser is converged on the materials to be machined, so that the laser direct writing machining can be achieved. The laser machining device can machine in a high speed direct writing mode, and at the same time, meets requirements of special machining shapes, achieves wide range of laser direct writing machining and has good practical significance.

The invention discloses a display device. The display device comprises a three-dimensional display module, a transparent display module and a liquid crystal light valve, wherein the transparent display module is overlaid on the upper portion of the liquid crystal light valve, the three-dimensional transparent module is overlaid on the upper portion of the transparent display module, and the three-dimensional display module, the transparent display module and the liquid crystal light valve all comprise multiple electrodes which can be controlled independently. When display contents are arranged on the transparent display module, an area on the three-dimensional display module is in a three-dimensional (3D) display state, wherein the area on the three-dimensional display module corresponds to the display contents on the transparent display module, the other areas of the three-dimensional display module are in a two-dimensional (2D) display state. An area on the liquid crystal light valve is in a light-proof state, wherein the area on the liquid crystal light valve corresponds to the display contents on the transparent display module, and the other areas of the liquid crystal light valve is in a transparent state or a semi-transparent state. The display device is not only capable of improving real effects of 3D frames displayed by the 3D display area on the display device, but also improving a contrast ratio between stereo display and transparent display.

The invention discloses a light-emitting diode (LED) backlight driving method, a drive device and a drive circuit. The method comprises the following steps of: generating a dimming signal which comprises dimming delay time information matched with the switching time of a liquid crystal light valve; and driving an LED backlight according to the dimming signal. When a liquid crystal television shows a three dimensional (3D) image picture, the dimming delay time information matched with the switching time of the liquid crystal light valve is added in the dimming signal generated by a signal generation device, so that a phenomenon of picture tailing caused by delay generated in the process of switching the liquid crystal light valve can be eliminated. In addition, drive current increasing information and drive output duty ratio reduction information are added in the dimming signal, so that luminance displayed by the image picture can be improved, and the average power consumption of the LED backlight is invariable.

A display device consists of a set of polarized light separator for separating nonpolarized light to be polarized light P and S, crystal light valve LCD1 and LCD2 to control light P and light S, one projective lens and one projective screen. It is featured as displaying left and right eye image formed by integrated light path separately and viewing two images in different polarization state by wearing polarized light glasses so as to form 3-D visual effect in the cerebrum.

A polarization luminaire is disclosed having a light source, a system of the optical integrator, a polarized light splitting device for splitting a light emitted from the light source into two kinds of polarized lights whose polarization directions are perpendicular to each other and whose traveling directions are apart from each other by an angle of less than 90 degrees, and a polarization conversion device for causing the two kinds of polarized lights to have the same polarization direction. The polarized light splitting device is placed on one of the entrance side and the outputting side of the first lens plate of the system of the optical integrator or is placed within the second lens plate. A prism beam splitter having a polarized light splitting film constituted by a thermally stable dielectric multi-layer film is suitable for the polarized light splitting device. Most of the polarized lights can be utilized by causing the polarized lights to have the same polarization direction. Further, the polarized lights, which have uniform brightness, can be emitted. Consequently, the polarization luminaire is suited to be a luminaire for use in a projection display that has liquid crystal light valves.

The invention provides a projector a lighting optical system, a micro-lens array, a shutter array, a liquid crystal light valve, a projection optical system, and a modulation control portion. The modulation control portion can control the shutter array and the liquid crystal light valve in response to levels of gray-scale of colors specified by input image signals. When the gray-scale value is 1% or less, time-interval control is effected in such a manner that 1% of light is allowed to pass through by the shutter array, while a fine gray-scale expression is achieved by the liquid crystal light valve. Also, when the gray-scale value is 0%, light is shut out completely by the shutter. When configured in this manner, it is possible to improve the reproducibility at darker levels of gray-scale and the contrast characteristics. Accordingly, the display characteristics of an image from a liquid crystal projector can be improved.

A projection type display is provided that can change a quantity of light emitted to a light modulation device without changing the intensity of light emission from a lamp and exhibits superiority in an image expression and adaptability to an operational environment. This includes an illumination device, a liquid crystal light valve modulating light emitted from the illumination device and a projection lens projecting light modulated by the liquid crystal light valve. This illumination device is provided with a light source and a fly-eye lens, making illumination distribution of light incident from the light source uniform and a liquid crystal element for light adjustment, which is disposed on an optical axis of light emitted from the light source and adjusts a quantity of light emitted from the light source. Hence, a quantity of light per unit time emitted from the illumination device is adjustable by driving a liquid crystal element for light adjustment with the time-sharing based on information from outside.

An all-solid-state laser radar scanning method employs a routine signal light source to enforce surface irradiation of a detection field, a liquid crystal light valve array is employed to switch each liquid crystal light valve unit on the liquid crystal light valve array one by one on an optical path between the optical module of a signal receiving module and a routine photoelectric receiver, and the reflection light of the whole detection scene is divided into optical signals one by one so as to realize all-solid-state scanning. The all-solid-state laser radar scanning method can use the routine signal light source and the routine photoelectric receiver, solve the problem that a current all-solid-state laser radar scanning method must depend on various special scanning chips and have a wide application prospect.

Provided are an illumination optical system allowing light beams to be condensed and enter an illumination area at different angles from each other, color separating elements that separate colors of the light beams from the illumination optical systems, liquid crystal light valves that modulate the color lights to form image light for the right and the left eyes, a color combining element that combines the color light beams, a wavelength-selective polarization rotating element that rotates the polarization direction of a predetermined color light so as to align the polarization direction with that of a light beam of another color, and a projection lens that magnifies and projects images. The liquid crystal light valves are provided with an incident side microlens array that causes the light beams for the right and the left eyes to pass respectively through the right and the left eye image pixels, and an exit side microlens array that condenses the light that has passed through the pixels. The projection lens is provided with a polarized light separating element that causes the polarization directions of image light for the right and the left eyes to be orthogonal to each other. Using one projection-type display apparatus, a highly efficient stereoscopic image can be displayed with little flicker and cross talk of image light for the right eye and for the left eye.

The present invention describes several embodiments of optical systems for the projection of images formed on reflective liquid crystal light valves. These light valves are capable of high resolution and very small sizes. The optical systems described are able to project these images with highly efficient utilization of light from an arc lamp source and are also very compact and easy to manufacture.

The invention discloses a liquid crystal light valve curtain for an autostereoscopic display, which comprises three overlapped liquid crystal boxes. Polymer networked cholesteric liquid crystal materials are poured into the liquid crystal boxes, each liquid crystal box is a controllable transflective liquid crystal light valve curtain operated in a reflection mode and a transmission mode, and the reflection wavelengths of the three liquid crystal boxes are respectively a red center wavelength, a green center wavelength and a blue center wavelength when the three liquid crystal boxes are operated in the reflection mode.

The invention relates to a multi-light source projecting system and relative light module, wherein the invention comprises: light source, light source controller, color selective dichroic mirror, liquid crystal light valve, light combine element and projection lens; the light source is formed by first and second lighting elements to supply first and second light colors; the light source controller controls the synchronous operations of light source and liquid crystal light valve; the color selective dichroic mirror divides the second color light into third and fourth color lights; the liquid crystal light valve receives the color light independently to transmit them to the light combine element; the light combine element combines the first, third and fourth color lights to be mixed to be projected to the projection lens to form light image. The invention can fully utilize the efficiency of second color light, to make the brightness of first, third and fourth ratio met with the needed final brilliance white light, to improve the light utilization.

Aspects of the invention provide a projector capable of comparatively easily achieving a contrast ratio higher than the original contrast ratio of the liquid-crystal light valve by a simple mechanism. The illumination light modulated by liquid-crystal light valves, i.e., image light, can be combined together in a cross dichroic prism, and then light intensity of suitable pixels is reduced by a proper amount by a liquid-crystal light valve, and then sent to a projection lens. The image light entering the projection lens can be projected to a projection surface. Because the light intensity of the image light formed by the liquid-crystal light valves is appropriately attenuated at suitable pixel areas by the liquid-crystal light valve, image light projection with a contrast ratio exceeding by far the contrast ratio achievable by the liquid-crystal light valves alone is possible due to cumulative light-intensity adjustment.

The invention discloses a light-cured quick forming device on the basis of a reflection-typed liquid crystal light valve, comprising a computer which is respectively connected with an image generator and a peristaltic pump; the peristaltic pump is communicated with a resin trough; the resin trough is internally provided with a lifting workbench which moves along the internal wall; the image generator is arranged above the lifting workbench. The method which uses the device for quickly forming the part comprises the steps as follows: 3D model of the part required to be formed is divided as layers by the computer; each sub-layer section data is gained; furthermore, the data is sent to the image generator; the image generator generates the optical digital views of each sub-layer section of the part according to the received data; furthermore, the optical digital view is projected to liquid photosensitive resin layer which is exposed and solidified, thus forming the light-cured resin layer of the current section of the part; the steps are repeated till the forming of the part is completed. The method of the invention has the advantages of low cost, high precision, high forming efficiency, simple process, etc.