34results about How to "Display image is clear" patented technology

The present invention provides a projection screen capable of sharply displaying an image by minimizing the influence of phase differences that are produced when light is slantingly incident on a polarized-light selective reflection layer having a cholesteric liquid crystalline structure, and of providing high image visibility. A projection screen includes: a polarized-light selective reflection layer having a cholesteric liquid crystalline structure, capable of selectively reflecting a specific polarized-light component; and a substrate that supports the polarized-light selective reflection layer. The cholesteric liquid crystalline structure of the polarized-light selective reflection layer contains a plurality of helical-structure parts that are different in direction of helical axis, and, owing to structural non-uniformity in the cholesteric liquid crystalline structure, the polarized-light selective reflection layer diffuses light (imaging light) that is selectively reflected. In the cholesteric liquid crystalline structure of the polarized-light selective reflection layer, the helical pitch on the side farther from the imaging-light-incident side is longer than that on the side closer to the imaging-light-incident side.

The present invention provides a projection screen capable of sharply displaying an image by minimizing the influence of the loss of light that occurs on a polarized-light selective reflection layer and of providing high image visibility. A projection screen includes: a polarized-light selective reflection layer that selectively reflects a specific polarized-light component; and a substrate that supports the polarized-light selective reflection layer. The polarized-light selective reflection layer includes a plurality of partial selective reflection layers that are laminated to one another, and the partial selective reflection layers have cholesteric liquid crystalline structures, owing to which they selectively reflect a specific polarized-light component. The cholesteric liquid crystalline structure of each partial selective reflection layer comprises a plurality of helical structure parts that are different in direction of helical axis, and, owing to structural non-uniformity in the cholesteric liquid crystalline structure, diffuses light (imaging light) that is selectively reflected. The partial selective reflection layer (11a) is for selectively reflecting light in the green (G) color wave range, the partial selective reflection layer (11b) is for selectively reflecting light in the blue (B) color wave range, and the partial selective reflection layer (11c) is for selectively reflecting light in the red (R) color wave range. These partial selective reflection layers (11a, 11b and 11c) are successively laminated in this order from the substrate side.

The invention provides a virtual reality device based on a controllable liquid crystal lens, and relates to the technical field of three-dimensional display. The virtual reality device comprises a display screen and a controllable liquid crystal lens, wherein the controllable liquid crystal lens is arranged on the display screen; the controllable liquid crystal lens comprises a plurality of electrodes; the electrodes are annularly arranged in the controllable liquid crystal lens. As the concentric and annular electrodes are taken as control electrodes, and the electrodes are respectively powered, the focus can be adjusted at any time, the adjustment range is relatively large, and relatively clear display images can be provided. The invention further provides an adjusting method of the virtual reality device. By adopting the adjusting method, the virtual reality device can be applicable to people with different eye sights, and the demands of users of different eye sights can be met.

The invention is an anti-halation area array CCD image sensor which is realized by adding image-sensitive unit addressing circuit and a light integral time pulse generation circuit on the existing sensor; breaking off gate connecting wires for connecting a phase-sensitive zone with CRVA2 and CRVA3 terminals of each image-sensitive unit, and connecting gate of each image-sensitive unit to correspondent output terminal of data selector in the image-sensitive unit addressing circuit; and dividing signals of the CRVA2 and CRVA3 terminals into two paths one of which is connected to input terminal of a sequence pulse signal generation circuit and the other one is used as light integral time pulse control signal output. By independently setting light integral time of each image-sensitive unit, strong light and halation which are difficult to eliminate are prevented to make display image clear. The existing area array CCD image sensor can normally work under halation-free condition. The anti-halation CCD camera prepared in the invention has simple circuit, can be realized easily, and has good application prospects in the fields requiring mechanical observing device such as military affairs, traffic, public security and fire fighting.

The invention discloses a gastrointestinal contrast agent containing traditional Chinese medicine ingredients. The gastrointestinal contrast agent consists of the following components in parts by weight: 55-75 parts of barium sulfate, 5-15 parts of a traditional Chinese medicine extract and 20 parts of mannitol, wherein the traditional Chinese medicine extract is prepared by a method comprising the following steps: mixing the following materials in parts by weight: 20-30 parts of bark of Chinese corktree, 10-20 parts of dried tangerine peel, 10-20 parts of coix seed, 5-10 parts of all-grass of hirsute gonostegia, 10-20 parts of tuckahoe, 20-30 parts of hawthorn, 5-15 parts of herb of christensen ceropegia, 20-30 parts of officinal magnolia bark, 10-20 parts of immature bitter orange, 20-30 parts of dwarf lilyturf tuber, 10-20 parts of Chinese angelica, 10-20 parts of turmeric root-tuber, 5-15 parts of Chinese caterpillar fungus and 10-20 parts of licorice; mixing; immerging by adding water; decocting; filtering; and drying. The gastrointestinal contrast agent disclosed by the invention can achieve beneficial effects of shortening the examination time, relieving side effects (nausea, emesis, inappetence and fatigue) caused by X-ray examination and the like, can also achieve an effect of nourishing or taking good care of stomach, liver and the like, and has a better using effect.

The invention provides an LED display device, a preparation method thereof and display equipment. The LED display device comprises a base plate, pixel points arranged on the base plate, and packagingglue covering the pixel points. Each pixel point comprises at least one LED chip. The LED display device further comprises a light reflecting wall which is vertically arranged on the substrate and surrounds the pixel points, and the light reflecting wall and the substrate jointly form a light condensation cavity of the pixel points. According to the LED display device provided by the invention, the light reflecting wall is arranged around the pixel points; the light rays emitted by the pixel points towards the side face can be reflected to the front face of the LED display device through the light reflecting wall, the light rays of the pixel points are condensed, so that the light emitting brightness of the LED display device is improved to ensure that displayed images in the outdoor environment are clear, and the user experience is improved.

The invention relates to a crane anti-collision control system which comprises a data acquisition unit. The data acquisition unit is connected with a parameter input unit. The parameter input unit is connected with a power source. The input end of the data acquisition unit is connected with a monitoring module. The monitoring module comprises a hook height sensor, a cart displacement sensor and a trolley displacement sensor. The output end of the data acquisition unit is connected with a controller. The output end of the controller is connected with a displayer. The controller is connected with an alarm and a control module. The control module comprises a hook height control mechanism, a cart displacement control mechanism and a trolley displacement control mechanism. The crane anti-collision control system has the advantages of being reasonable in design, simple in structure, convenient to operate, high in applicability, high in intelligent degree, good in anti-collision effect, sensitive in response, stable in running, high in work efficiency, safe, reliable and long in service life.

The invention discloses a novel laser beam repairing machine workbench which comprises a placing platform, a placing groove is formed in the top of the placing platform, triangular supporting plates are fixedly connected to the four corners of the placing groove, four L-shaped limiting strips are fixedly connected to the bottom of the placing groove, and three supporting ejector pins are arranged at the positions, located among the four L-shaped limiting strips, of the bottom of the placing groove. The device has the beneficial effects that the device is simple and convenient to operate, different models of masks can be limited through the placement groove and the L-shaped limiting strip, and then the masks are finely adjusted through the servo motor arranged at the bottom, so that a displayed image is clearer, and the accuracy is improved.

The invention provides a large-scale thin light screen digital video terminal, which relates to the digital video technology and applied optics technology field. In order to improve the performance and price ratio, the video processing circuit adopts the three-time speed time compression circuit composed of BBD components to acquire PDTV image signal, arranges a continuous zoom asymmetrical optical path before the image display to collaborate with the large field view and high efficiency triangle lens, and by combining with the half-way division of the anti-thin pack structure, adopts the 3fv field frequency to trigger and cyclically switch the tricolor synthesis serial source image signals; utilizing the synchronically flap mirror circuit same field driver source image display and via the bugeye lens oblique rays optical path, an ultra-large image is formed by an entire reflection and amplifying in the large-scale thin light screen. The implementation of the invention is of conventional process, with superior performance and cheap price, the efficiency of which greatly overruns the present flat-panel display technology.

The invention discloses an anti-light-interference AG film composition for a laser anti-light screen and a preparation method of an AG film. The anti-light-interference AG film composition comprises UV hardening liquid, a sanding agent, a dispersing agent and black nano color paste, wherein the dosages of the sand finishing agent, the dispersing agent and the black nano color paste are respectively 5-8%, 0.5-1% and 6-9% of the weight of the UV hardening liquid. The AG film provided by the invention has relatively high haze, can be used as the outermost layer of a laser anti-light screen, and is used for improving the incidence rate of light rays of a projector and reducing the reflectivity of the light rays of the projector, so that the imaging effect is improved; the AG film is high in hardness, so that the screen can be prevented from being scratched; the surface color of the AG film is transparent black, the anti-interference light function of the screen can be improved through black light absorption, and images displayed on the screen are still clear even under the condition that ambient light is strong.

The invention provides a teaching device for a computer major, belonging to the technical field of computer major teaching. The teaching device for the computer major comprises a multimedia teaching device, a main control computer and a student terminal computer, wherein an outer sleeve is fixedly arranged at the top of the front end of the multimedia teaching device; a fixing base is fixedly arranged at one end of the outer sleeve; a motor box is fixedly arranged at the end, away from the fixing base, of the outer sleeve; a small motor is fixedly arranged in the motor box; the output end of the small motor is fixedly connected with a cloth rolling shaft; the end, away from the small motor, of the cloth rolling shaft is rotationally connected to the fixing base; a dust blocking cloth curtain is arranged on the cloth rolling shaft in a rolling mode; and the end of the dust blocking cloth curtain is fixedly connected with a pulling strip. According to the teaching device for the computer major, a teacher can conveniently carry out operation demonstration on a computer, students can clearly watch the operation demonstration, teaching images are clearly displayed, specific teaching speeches can be carried out through blackboard writing, and better teaching effect is obtained.

The present disclosure provides a liquid crystal panel and a fabricating method thereof. The liquid crystal panel has an array substrate, a color film substrate and a liquid crystal layer mounted between the array substrate and the color film substrate. The color film substrate forms multiple color resists thereon to form multiple color filter units. The array substrate at least forms a first spacer and a second spacer thereon. A height of the first spacer is equal to a height of the second spacer. A thickness of the color resist corresponding to the first spacer is different from a thickness of the color resist corresponding to the second spacer. The present disclosure simplifies a fabricating art, saves cost and effectively maintains a thickness of the liquid crystal panel at the time to ensure that the liquid crystal panel can clearly display image.

The invention discloses a pancreas color doppler converting agent and a preparation method thereof. The pancreas color doppler converting agent is prepared from the following raw materials in percentage by weight: 10 to 17 percent of wheat powder, 28 to 32 percent of rice, 1 to 5 percent of zizania aquatica, 2 to 6 percent of madarin orange peel, 8 to 12 percent of tapioca flour, 26 to 32 percentof soybean, 3 to 7 percent of brown rice and 1 to 5 percent of stevioside. The total percentage of the raw materials is 100 percent. The pancreas color doppler converting agent provided by the invention can be well remained in the stomach to match a color doppler for ultrasonic penetration, so that a liver tissue type imaging interface is realized after the passing through the stomach and duodenum; therefore the pancreas organ can be clearly observed; the misdiagnosis due to unclear pancreas imaging due to the interference by the stomach and duodenum can be reduced. The pancreas color dopplerconverting agent has the characteristics of short detection time, high image development efficiency and stable effects.