158 results about "Dot pitch" patented technology

There are provided n number of line-type inkjet nozzles (2) which include nozzles (4) that eject a liquid material and a rearranged in a row, and which are arranged in parallel with each other so that positions of the nozzles (4) are shifted from each other by 1/n of a nozzle pitch (P1). Thus, an inkjet head (1) as a whole has a state equivalent to a state in which the nozzles (4) are arranged at 1/n of a nozzle pitch of one line-type inkjet nozzle (2). The inkjet head (1) is capable of adjusting a timing of ejecting the liquid material for each line-type inkjet nozzle (2). Accordingly, adjustment of a dot pitch such as fine coating and rough coating can be performed with ease.

The invention relates to a naked eye free three-dimensional displaying technology, which arms at synthetizing corresponding three-dimensional images by meeting following requirements: 1, an included angle between surface-mounting direction of grating and the vertical direction is at an arbitrary value; and 2, the technology is suitable for a parallax barrier mode and a lens cylindrical surface mode, and simultaneously is capable of being applied to rectify angle error generated by grating surface-mounting. The technical scheme adopted by the synthetizing algorithm based on naked eye three dimensional displaying technology comprises the following steps: setting a dot pitch of a displayer as delta, a resolution ratio as W*H, a grating pitch as d, an inclination angle as alpha, and viewpoints as N, thus the initial arranged positions of sub-pixels of each row are determined to be consistent with initial positions of subsamplings: delta h equals to 3h*tan alpha equivalent to N (2); circulating for H times with row serving as a unit, and finally generating a three-dimensional composite image. The synthetizing algorithm based on naked eye three-dimensional displaying technology is mainly applied to free three-dimensional displaying.

The invention discloses an arbitrary-curved-surface plane seamless spliced high-quality large-screen display device. The arbitrary-curved-surface plane seamless spliced high-quality large-screen display device is formed by stacking brick-shaped optical-fiber rear-projection display modules, wherein elements of each brick-shaped optical-fiber rear-projection display module include a variable-cross-section optical fiber panel, a signal processing module, a liquid crystal display panel, an LED (light-emitting diode) light source module, a fixing device, a shell, an anti-dazzling frosting coating and a touch sensing plate. The arbitrary-curved-surface plane seamless spliced high-quality large-screen display device has beneficial effects that a seamless spliced high-quality screen with small dot pitch can be produced, a display video picture of an arbitrary curved surface, a special arbitrary shape, and an arbitrary area can be realized; the seamless splicing principle is the primary-pixel splicing principle, pixel points are uniformly and compactly arranged, and the display consistency of the brightness and color is optimal; by adopting the modularized production, the constitutional part is easy to repair and replace; the touch sensing plate can be embedded into the display device, so that precision in positioning can be realized, and the picture quality and the shape of the display device are not affected; the water resistance and collision resistance are relatively good.

The invention relates to a method used for overlapped positioning and transition processing of digital ink jet printer spray head splicing. Errors are avoided by using the flexibility and the alterability of digital control and an end-to-end overlapping method. N overlapped dot pitches are preset and trial printing is performed on a drawing in advance so that an overlapping relation of dots is predicted. According to the number of overlapped dots, the overlapped parts of the head and the tail of the spray heads a and b are printed with part of ink dots, so the relation of mackle is eliminated, and intervals among at least n dot ditches can be regulated so that all kinds of errors are corrected.

The invention discloses a universal three-dimensional picture synthesis method based on lenticular grating LCD (liquid crystal display) free three-dimensional display device, comprising the following steps: 1) measuring the actual lines LPI value and actual elevation angle Alpha value of the lenticular grating; 2) carrying out sampling on N viewport pictures according to the required viewport number N and resolution factor H*V of synthesizing three-dimensional pictures, the vertical resolution factor of each viewport image being sampled to be V/v, and the horizontal resolution factor being sampled to be H/h, wherein, N is more than or equal to 2, v*h is equal to N, and v is an integral value mostly close to N; 3) filling the RGB (red, green, blue) components of N sampled viewport pictures in the RGB components of the three-dimensional pictures according to the actual lines LPI value, the actual elevation angle Alpha value and the dot pitch DOT of an LCD display so as to obtain the required three-dimensional pictures. The universal three-dimensional picture synthesis method is applied to lenticular grating with random lines LPI value and random elevation angle Alpha value, and can quickly and accurately synthesize three-dimensional pictures with random viewport numbers and random resolution factor.

The invention discloses a quick tiled display method for light-emitting diode (LED) screens with different dot pitches and different dot matrixes. The method comprises the following steps of: a, analyzing the composition conditions of LED large screens with different dot pitches and different dot matrixes, normalizing the LED screens with different dot pitches into a virtual dot matrix number at the same dot pitch and calculating total virtual dot matrix number of the entire LED screen; b, setting input rectangular image coordinates of a corresponding processor according to the proportion of the virtual dot matrix number after the normalization of the LED screens with different dot pitches to the total virtual dot matrix number of the entire LED screen; and c, setting output rectangular image coordinates of the corresponding processor according to the real dot matrix numbers of the LED screens with different dot matrixes.

The invention discloses an LED naked eye 3D display device which comprises an LED display screen, a diffusion film and a parallax barrier raster, wherein the pixel density of the LED display screen in the longitudinal direction is different from that of the LED display screen in the transverse direction. The dot pitch of transverse pixels of the LED display screen is smaller than that of longitudinal pixels of the LED display screen, namely the transverse resolution is higher than the longitudinal resolution. The transverse high resolution is used for compensating for resolution loss of multi-view stereo display, and the stereo display longitudinal resolution is not lost, so that the longitudinal resolution is smaller than the transverse resolution, and cost is saved. The purpose that the dot pitch of the transverse pixels is smaller than that of the longitudinal pixels can be achieved through the shape or the arrangement of sub pixels. According to the LED naked eye 3D display device, on the premise that it is guaranteed that an existing LED display screen manufacturing process and an existing LED display screen heat dissipation process can meet the requirements of the pixel point density, the transverse resolution is improved through proper reduction of the longitudinal resolution, images are watched gently, and moire fringes are fewer.

The invention provides a square lattice anti-counterfeit label group, which is composed of a plurality of lattice anti-counterfeit figures arranged in order. A method for reading the square lattice anti-counterfeit label group comprises the following steps: performing gray level analysis on a label group image, and obtaining a corresponding code point group image; acquiring a dot pitch average value; generating the code point group image with a cell according to the dot pitch average value; dividing a plurality of lattice anti-counterfeit images with cells with the same dimension according to the dot pitch average value; determining a position of a locating shaft according to the dot pitch average value; and obtaining practical code value data of the square lattice anti-counterfeit label group by analyzing. A system for reading the square lattice anti-counterfeit label group comprises a label group image acquisition device, a gray value analyzer, a dot pitch average value acquisition device, a code point cell drawing device, a lattice anti-counterfeit image dividing device, a locating shaft position determining device and a practical code value data calculating device. The square lattice anti-counterfeit label group, and the method and system for reading the square lattice anti-counterfeit label group provided by the invention can obtain the authenticity information of the anti-counterfeit label by only adopting a smartphone or a tablet computer, and have the advantages of being convenient and fast.

The invention discloses a dam leakage channel detection method and device based on magnetic field measurement. The method comprises that S1) a background magnetic induction intensity vector of each magnetic observation point when power is not supplied to a signal emitter and the total magnetic induction intensity vector of each magnetic observation point when power is supplied are obtained, emitter electrodes A and B are arranged in the two sides of a dam respectively, the emitter electrode A is positioned in a reservoir and makes contact with water, the signal emitter is connected between theemitter electrodes A and B, and the magnetic observation points are arranged on the dam according to preset line pitch and dot pitch; S2) a difference between the total magnetic induction intensity vector and the background magnetic induction intensity vector of each magnetic observation point is calculated to obtain a magnetic abnormal vector of the magnetic observation point; and S3) current density distribution is deduced based on the magnetic abnormity vector of each magnetic observation point in the magnetic abnormity field, and the leakage channel is in the position where the current density distribution is not zero. The brand new method is used to realize leakage channel detection, and magnetic detection is used for the first time.

The invention provides a small-spacing LED full-color display screen achieved by virtue of a single-layer PCB board (printed circuit board). The pixel pitch of the display screen is less than 4mm; and the LED full-color display screen is an ultrathin bendable single-faced display screen which is 1mm or a double-faced display screen which is 3mm.

The invention discloses a TBM-carried rock slag online compressive strength testing system and a TBM-carried rock slag online compressive strength testing method. The TBM-carried rock slag online compressive strength testing system comprises a robot, a grating projection device, a visual processing device and a compressive strength testing device, wherein the robot is used for acquiring rock slagin the TBM tunneling process; the grating projection device can project structured light to the tested rock slag to form a two-dimensional light bar image in the surface shape of the rock slag; the visual processing device can calculate to obtain a rock slag three-dimensional shape model according to the two-dimensional light bar image shot and projected onto the rock slag surface to form distortion; a loading point position is calculated by means of a rock slag three-dimensional shape model, and whether the tested rock slag meets the requirements or not through the distance between the loading points is judged; and the compressive strength testing device is used for automatically testing the compressive strength of the tested rock slag meeting the requirements. The TBM-carried rock slag online compressive strength testing system and the TBM-carried rock slag online compressive strength testing method have the beneficial effects of being high in timeliness, high in automation degree, safe, economical and the like, effectively solves the problem that surrounding rock strength information of current TBM construction is difficult to obtain in real time, and real-time surrounding rockcondition information and a control parameter decision basis are provided for TBM tunneling.

A liquid crystal display capable of improving a color reproduction range is disclosed. The liquid crystal display includes a liquid crystal panel having a plurality of gate lines and a plurality of data lines which cross each other to define a plurality of unit pixel regions; a first pixel region having a first dot pitch among individual pixel regions in at least one of the unit pixel regions; and a second pixel region having a second dot pitch among the individual pixel regions in the unit pixel regions, wherein the first and second dot pitches of the first and second pixel regions are different from each other. By this configuration, the pixel electrodes are formed to have the same opening ratio in the individual pixel regions forming a unit pixel by changing the shape and size of the pixel electrodes in a region having a sensor and a region without a sensor, thereby improving a color reproduction range and improving the display quality of the liquid crystal display.

The invention provides a curved-surface composite super-resolution current-carrying pipe which is characterized in that a hollow curved-surface current carrier is adopted; the curved-surface current carrier is a composite structure which is formed by at least a metal layer and a dielectric layer, the sample to be tested is arranged in the hollow chamber thereof. The curved-surface composite super-resolution current-carrying pipe leads the dielectric constants in the normal direction and tangential direction to have opposite symbols by constructing the curved-surface composite structure of metal and dielectric and leads high frequency quantity which carries fine structure information and can not be transmitted in normal lens to be transmitted in the curved-surface composite super-resolution current carrying pipe wall and not to generate mutual interference; the dot pitch is more than the Rayleigh resolution limit when the high frequency quantity is emitted out through the curved surface of the external wall of the current carrying pipe, thus realizing that the sample structure of nanometer-class exceeding the diffraction resolution limit can be observed far away; the curved-surface composite super-resolution current-carrying pipe has high resolution, avoids the error of close detection and has far imaging which is more convenient for operation and application.

The invention belongs to the technical field of computer information, and specifically relates to a method and a device for storing point cloud data. The method for storing point cloud data comprises: calculating a bounding box of the point cloud data; according to an octree structure, performing recursion segmentation on the bounding box, each hierarchy of the octree structure being corresponding to a dot pitch; after segmentation of each time, according to the dot pitch of a current hierarchy, determining whether points in each subcell space obtained by segmentation belong to the current hierarchy, storing information of the points which belong to the current hierarchy in a file form, wherein each subcell space obtained by segmentation is corresponding to a node in the current hierarchy, and each node is corresponding to a file. The method and the device for storing point cloud data reduce storage size of point cloud data, improve reading, query, and rendering efficiency of the point cloud data.

The invention discloses an optical field display system based on optical waveguide coupled light exit pupil segmentation-combination control. The system takes at least one optical waveguide projectionunit for projecting an image to a limited far projection surface as a display unit, and performs region segmentation combination control of the coupled light exit pupil through the at least one optical waveguide projection unit, In combination with polarization characteristics or/and time sequence characteristics, views with the viewpoint distance smaller than the pupil diameter of an observer are projected to each eye of the observer, spatial superposition of light beams from more than one view is used for forming monocular spatial light spot distribution capable of being naturally focused,and three-dimensional light field display is achieved. By means of the optical waveguide, the display system has a light and thin structure and can be applied to various screens and portable display terminals such as head-mounted VR, AR, mobile phones and iPads.

The invention discloses an automatic baseline measuring system comprising a casing, a data processing and control module arranged inside the casing and a positioning module electrically connected with the data processing and control module. In addition, the automatic baseline measuring system also consists of an optical distance measuring module, an angle measuring module, a measuring data display module and/or a measuring data interface module that are connected with the data processing and control module electrically. The positioning module transmits obtained latitude and longitude information and the like to the data processing and control module; the optical ranging module measures distance information and transmits the information to the data processing and control module; and the angle measuring module measures attitude values like an azimuthal angle and a pitching angle and transmits the values to the data processing and control module. According to the invention, data fusion is carried out on latitude and longitude information, the attitude values and the distance data; and when the distance between two points is measured, range finding is carried out by using the principles of optics directly instead of using the geographic coordinate calculation. Moreover, the efficiency is high and the error is small.

The invention discloses a bird nest positioning and early fault warning method for a power transmission tower. The method comprises the steps: 1) acquiring a front color image of the power transmission tower with a bird nest, and carrying out graying and mean filtering on the image; 2) carrying out Otsu segmentation and mapping a target to an original grayscale image so as to obtain a power transmission tower image H; 3) performing Hough straight line detection on the power transmission tower image H to obtain a maximum enclosing rectangle of a cross arm area and coordinates of hanging pointsof insulator strings; 4) creating a sliding template with a similar size, extracting pixel points in a cross arm, calculating a gray level co-occurrence matrix of a template area, and determining a bird nest area; 5) extracting the whole image A marked with the bird nest area, and carrying out ellipse fitting on the bird nest area marked in the whole image A; and 6) calculating the distances between the hanging points and the center point of the bird nest, and finally issuing related precaution affairs or alarms. According to the method, the position of the bird nest is actively located, and the relative distances between the hanging points and the bird nest are calculated.

The invention discloses a high-entropy alloy selective laser melting process parameter optimization method. The method comprises the following steps: 1, printing a high-entropy alloy sample by adopting a selective laser melting method which is a cross-over experiment of randomly selecting or specifying three process parameters of power, exposure time and line-dot pitch; 2, detecting the relative density of the high-entropy alloy sample obtained in the step 1; 3, performing polynomial fitting on the relative density obtained in the step 2 and the corresponding three process parameters of the power, the exposure time and the line-dot pitch in the step 1, wherein a polynomial is composed of a cubic term, a quadratic term, a first term and an interactive term about the three parameters respectively; and 4, performing extreme value solving of the relative density on the fitted polynomial, wherein the power, the exposure time and the line-dot pitch corresponding to the extreme value of the relative density are the optimal process parameters. By using the method, an optimization result which is more accurate than that of a traditional optimization process can be obtained.

The invention relates to a lifting-controllable LED louver strip display screen and a manufacturing method thereof. The display screen comprises LED metal material lamp strips, LED lamp strip fixing members for connecting and regulating the LED metal material lamp strips, and a power supply of the LED lamp strips. The LED louver strip display screen provided by the invention has the following advantages that: 1, the structure is light so that the problem of bearing unavailability in special occasions is solved; 2, dot pitches can be transformed flexibly to achieve different transformation effects; 3, a lamp holder is made of a light metal material and has the characteristics of light weight, no deformation, friction resistance and oxidation resistance; 4, a constant-current drive circuit can be used for realizing different television/movie playing effects, such as point-to-point control, animation and the like so as to realize synchronous and asynchronous control; and 5, the heat radiation is fast, and the defect of energy waste generated because the traditional LED display screen structure needs to be cooled by an air conditioner and the like is overcome.

The invention provides a dot matrix generation method and device, a storage medium, electronic equipment and a VCSEL array light source, and the method comprises the steps: obtaining the regional parameters of a dot matrix region corresponding to the VCSEL array light source and a preset dot spacing parameter, wherein the dot spacing parameter represents the minimum distance between any two pointsin the dot matrix region; and generating random points in the dot matrix area according to the area parameters and the dot spacing parameters to obtain a dot matrix corresponding to the VCSEL array light source. In this way, the height irrelevance of the dot matrix can be guaranteed, area parameters and dot spacing parameters can be set according to actual needs, the dot matrix with the height irrelevance and meeting the requirements is obtained as much as possible according to the actual needs, scattered spots projected to the space by the VCSEL array light source have the high irrelevance,and therefore the high irrelevance of the scattered spots is guaranteed. Therefore, the calculation or acquisition of the structured light depth information is facilitated. Moreover, according to thedot matrix obtained in the mode, speckles projected to the space have uniqueness, and depth information reconstruction of speckle structured light can be well met.

The invention relates to the technical field of LED display, and particularly discloses an LED screen correction image acquisition method, correction method, acquisition device and correction system. The acquisition method comprises the steps: calculating the target acquisition width and height range of a camera; generating a plurality of lamp point lightening schemes according to the lamp point spacing of the LED display screen, the target acquisition width and height range and a preset lamp point spacing strategy; generating corresponding display control information and shooting control information according to each lamp point lightening scheme; and obtaining correction images shot by the camera under the different shooting control information on the LED display screen under the different display control information, and the like. On the basis of meeting the data precision requirement, the correction images as few as possible are obtained, the image acquisition efficiency is improved, the CMOS pixels can be fully paved by the obtained correction images as much as possible, the problems of peripheral defocus, distortion and the like of the correction images in the prior art are solved, and the subsequent correction effect on the LED display screen is ensured.

The present invention provides a sphere stationing method, a capture ball and a system for optical motion capture. A pre-determined graph combination is employed to divide the surface of a sphere to allow the surface of the sphere to show a uniform graph distribution state and facilitate setting of reflective marking points of the sphere at the vertex of each geometry image or edge central point of each geometry image so as to form a capture ball for optical capture. The capture ball obtained by employing the sphere stationing method is uniform in stationing and small in distance difference between the reflective marking points to facilitate rapid capture of the reflective marking points on the capture ball through the system and facilitate obtaining of the motion pose information of the capture ball by the system according to the displacement change recognition of the reflective marking points when the optical capture system is utilized to perform motion pose recognition of the capture ball. The sphere stationing mode is employed to obtain the capture ball, the motion pose recognition of the capture ball can be performed in a condition that there are only few matching points on the sphere, and therefore, the system computing amount is reduced, and convenience is brought to the practical application.

The invention provides a printing device, a printing method and a program thereof. The printing device includes the following features. The first dot group in which dots are formed based on the first printing condition and the second dot group in which dots are formed based on a printing condition which is different from the first printing condition are formed together in a common region. In the common region, when the printing is performed in a plurality of conditions such that a difference of the dot pitch between a formation position of dots belonging to the first pixel group and a formation position of dots belonging to the second pixel group is 2/720 inch to 5/720 inch, the change in CIEL*a*b* of the printed image is within the preliminary determined range.