93results about How to "Guaranteed Contrast" patented technology

The invention discloses a method for eliminating dynamic streaking of liquid crystal display. The concrete steps include: (a). convert images of two following frames into black and white brightness signal images; (b). compare the pixels at the corresponding position in the black and white brightness signal images and retain the pixel with a smaller grayness value; (c). form a frame of black frame insertion images (Gn) with the group of pixels obtained after the comparison of each pair of pixels; (d). insert the black frame insertion images (Gn) into images of two following frames. The method of the invention is to compare continuous image signals of two frames, and form a frame of 'new grayness distribution signal' with the darker pixels of each pixel position as the black frame insertion image to reach the purpose of lowering MPRT and eliminating streaking of dynamic images. The invention can not only overcome the shortcoming of the low efficiency of the black frame insertion technique, but also overcome the inadequate elimination of dynamic blurs and the high decline of the contrast in gray frame insertion technique. In addition, the method of obtaining insertion frames is simple and accessible, thus greatly saving the production cost.

The invention discloses a display substrate and a preparation method thereof, a display panel and a display device. The display substrate comprises a plurality of display areas arranged in an array and non-display areas located between the display areas, wherein a display structure is arranged in each display area and is used for displaying a picture; and the non-display areas are transparent, and photochromic graphics are arranged in the non-display areas and are used for adjusting the light transmittance of the non-display areas according to the illumination intensity of the received light. According to the display substrate, the photochromic graphics are arranged in the non-display areas and can adjust the light transmittance of the non-display areas according to the illumination intensity of the received light, so that the brightness of the area for displaying a relatively dark image originally on the displayed picture is not improved due to the influence of external ambient light in a high-brightness external environment, thereby effectively ensuring the contrast of the displayed picture and improving the display quality.

The invention is fit for the technical field of LED (Light Emitting Diode) display and provides an LED display screen free from moire. The LED display screen free from moire comprises an LED lamp panel and a light diffusion structure, wherein a plurality of LED lamp beads distributed in an array are arranged on the LED lamp panel; the light diffusion structure is arranged on a light-emitting side of the LED lamp panel; the light diffusion structure comprises frames in an array form; the space is divided into a plurality of subspaces by the frames; a light diffusion medium is arranged in each subspace; the width of the top, far away from the LED lamp panel, of each frame is less than 0.3mm. According to the invention, the light diffusion structure is arranged on the light-emitting side of the LED lamp panel; the light emitted from the LED lamp beads forms a uniform area light source by passing through the light diffusion medium; the width of the top of each frame is extremely narrow, so that the periodicity of the pixel structure is weakened; when a CCD (Charge Coupled Device) or CMOS (Complementary Metal-Oxide-Semiconductor Transistor) array camera is used for shooting the LED display screen, no moire is generated; since each LED lamp bead corresponds to each subspace and different LED lamp beads are free from optical crosstalk, so that the contrast ratio of a picture is ensured.

The embodiment of the invention discloses a character stacking method a device thereof, including: obtaining a video image block required stacking the first character; obtaining the first character; obtaining the brightness mean value of the video image block; adjusting the brightness value of the foreground color pixel point of the first character according to the brightness mean value, to obtain the second character, wherein the relative value of the brightness value of the foreground color pixel point of the second character and the brightness mean value is larger than or equal to the first presupposed value; stacking the foreground color pixel point of the second character according to the brightness value and the corresponding pixel point in the video image block. Through adjusting the brightness value of the foreground color character to be stacked, that the difference is present between the brightness value of the foreground color of the character to be stacked and the brightness mean value of the video image block is ensured, to real-time ensure the contrast between the stacked character and the video image, thereby clearly displaying the stacked character.

The invention provides a non-uniform illuminance image enhancement method, and belongs to the technical field of digital image processing. The method aims to solve the problems of an image enhancement method in the prior art; according to the method, image enhancement processing can be carried out on a non-uniform illuminance image. The non-uniform illuminance image enhancement method includes the following steps that a histogram of the non-uniform illuminance image is made, a threshold value is determined according to peak values of high illuminance and low illuminance, the histogram is divided into a high illuminance sub-band and a low illuminance sub-band, a sub-band brightness enhancement method is maintained for the high illuminance sub-band and a corresponding gray level mapping enhancement method is adopted for the low illuminance sub-band. According to the non-uniform illuminance image enhancement method, the situation that the image is excessively enhanced locally is avoided, overall noise of the image is inhibited, and the image which is uniform on the whole is obtained. The calculation amount of an algorithm is little, and the method is stable and reliable and can be used in real-time project systems.

The invention relates to a liquid crystal display panel and a liquid crystal display. The liquid crystal display panel includes a first polarizing layer and a second polarizing layer which are disposed opposite to each other, a vertical alignment liquid crystal box disposed between the first polarizing layer and the second polarizing layer, and a double-optical axis compensation film. According tothe liquid crystal display panel and the liquid crystal display, the double-optical axis compensation film is used to compensate for the leakage of side view light, so that the contrast of the side view of the liquid crystal panel is maintained, the thickness of a polarizer is reduced, and at the same time, the effect of reducing warping during the preparation of the liquid crystal panel is achieved.

The invention discloses an ultrasonic temperature imaging method based on plane waves. The method includes the following steps that ultrasonic signals are transmitted to a test area according to different preset deflection angles with a preset number at the initial moment, echo signals sent back from the test area are received, and images with a preset number are obtained; the obtained images with the preset number are superimposed according to preset conditions, and a first frame of compound image is obtained; compound images with a first number in the test area are obtained within set time; accumulation is conducted on the temperature changes between adjacent frames of compound images of the compound images with the first number according to the time sequence, and a two-dimensional temperature distribution diagram corresponding to the last frame of compound image is obtained; a B-ultrasonic image of one frame of compound image is obtained; the B-ultrasonic image and the two-dimensional temperature distribution diagram are merged, and a two-dimensional temperature image of the test area is obtained. According to the ultrasonic temperature imaging method, very good sensitivity is achieved on ultrasonic radio frequency data changes caused by temperature changing, estimation of the temperature is facilitated, and the resolution ratio and the contrast ratio of the image can be ensured.

The invention provides a background suppression method in TFT-LCD screen automatic optical detection. The method includes the following steps that firstly, images under different TFT-LCD point screen modes are collected; secondly, a series of high-frequency sub-bands and low-frequency sub-bands are obtained after multi-stage wavelet decomposition of the images; thirdly, each stage of high-frequency sub-bands in multiple directions are subjected to coefficient smoothing, and each stage of low-frequency sub-bands are subjected to contrast enhancement; fourthly, the processed high-frequency sub-bands and the processed low-frequency sub-bands are subjected to wavelet reconstruction, and defect images are obtained after background suppression. The images are subjected to multi-scale multi-resolution decomposition, the decomposed high-frequency sub-bands and the decomposed low-frequency sub-bands are subjected to texture suppression and image enhancement respectively, the contrast of original defects can be kept while background texture is suppressed, and the texture suppression effect is good.

The invention provides a power chip type LED light source for an LCD backlight module, which is formed by a plurality of grid-shaped semiconductors, and at least two LED semiconductors are arranged in each grid. The LED light source comprises a printed circuit board (PCB), an LED chip arranged at the upper side of the PCB and a light-emitting lens arranged at the light-emitting surface of the LED chip; a radiator is arranged under the PCB, PCB leads are distributed around the radiator, and the radiator is assembled with electrical connection structure and a corresponding control circuit; and the radiator and the PCB are fixed into a whole by a mechanical fastening part and the same extended light source. The power chip type LED light source has stable and shockproof structure, good color rendition and heat dissipation effect, no incomplete shadow, electricity conservation and long service life, and can remarkably improve the color expressive force of liquid crystal display.

The invention provides a holographic grating exposure method adopting heterodyne interference fringe locking control, belonging to the field of spectrum techniques. The existing holographic grating exposure method realized by adopting a linear array CCD (Charge Coupled Device) in the prior art has the problem that high-frequency fringe jitter inhibition effect is poor due to a reason that the response speed of the linear array CCD is slow. A set of holographic grating exposure device and a set of heterodyne interference fringe locking control device are equipped. Interference fringes are locked in real time and are placed on a grating substrate for exposure. The method provided by the invention has the advantages that the interference fringes can be locked at a certain fixed value relative to the phase of the grating substrate during exposure of a holographic grating; since the control bandwidth is larger, the high-frequency fringe jitter can be better inhibited, the contrast of the groove profile of the holographic grating is guaranteed and the manufacturing process level of the holographic grating is improved.

The invention relates to a liquid crystal aligning agent, a liquid crystal aligning film and a liquid crystal display element. The subject of the invention is end capped polyamide acid or liquid crystal aligning agent for optical aligning film of the derivative of the end capped polyamide acid which is obtained by reaction of Tetracarboxylic acid dianhydride, diamine compounds and amino silane compounds. The liquid crystal display element for a liquid crystal aligning film formed through the liquid crystal aligning agent for the optical aligning film can control generation of the foreign matter in the liquid crystal layer in the element to maintain orientation, aligning stableness, contrast, AC after image and other characteristics.

The invention provides a method for debugging the driving waveform of a three-color electronic paper module, and the method herein has the characteristics of excellent universality, and excellent comparison and display effects. The method is characterized in that the method includes the following steps: 1. determining master driving frames: driving the three-color electronic paper module by usingblack / white / red picture standard test waveforms, and separately reading the black, white and red optical values of a test picture under three kinds of standard test waveforms by using an optical tester, separately comparing the black, white and red optical values with a standard black L*value, a standard white L* value, and a standard red L* value and a* value, obtaining a standard test waveform that meets optical requirements and obtaining a black / white / red master driving frame of the three-color electronic paper module; 2. determining DC balance frames: separately based on the black master driving frame, the white master driving frame and the red master driving frame, determining the DC balance frames corresponding to the black master driving frame, the white master driving frame and thered master driving frame; and 3. determining driving waveforms which include the DC balance frames that perform first driving and the black master driving frame, the white master driving frame and the red master driving frame that perform follow-up driving.

The present invention relates to a video processing device comprising a luminance and saturation detector (LSHD) for detecting the luminance values (lum) and the saturation values (sat) of pixels of an input video signal (IN); and a white-point, saturation and hue modulator (WSH) for transforming luminance and saturation properties (lum, sat) of the pixels of the input video signal (IN) into white-point, saturation and hue correction factors (W, Wc; S, Sc; H, Hc). The video device also comprises a color gamut matrix generating unit (CGMG) for generating a color gamut matrix in the perception domain based on the white-point, saturation and hue correction factors (Wc, Sc, Hc) of the white-point, saturation and hue modulator (WSH); a color gamut mapping unit (20) for multiplying the pixels of the input video signal (IN) with a color gamut matrix generated by the color gamut matrix generating unit (CGMG); and a clipping unit (31) for clipping the results of the a color gamut mapping unit (20) which are out of a predefined range.

The invention provides a method for precisely regulating the direction of interference fringes in a scanning exposure light path, relates to the technical field of spectrum, and aims at solving the technical problem to provide the method for regulating the direction of the interference fringes at high precision. In order to solve the technical problems, the method has the technical scheme that a reference grating is placed on a two-dimensional moving work table; a set of scanning exposure light path is prepared; a reflector is regulated so that the exposure light beams respectively meet the Littrow condition; the work table is moved in the scanning direction, the reference grating direction is regulated according to the interference fringe change condition observed on a CCD (charge coupled device); the plane reflector is regulated so that the two light beams coincide at a position PSD (phase-sensitive detector) and an angle PSD. When the method provided by the invention is adopted, the direction of the interference fringes can be precisely regulated, the guarantee is provided for the contrast of a scanning interference field exposure system in the scanning process, and greater actual significance is realized on the manufacture of a scanning exposure holographic grating.

The invention discloses a pixel circuit, a driving method thereof and a display panel. The pixel circuit comprises a driving module, a threshold compensation module, a data writing module, a storage module, a light emitting module and a potential control module; the driving module is a thin film transistor of a first type; the threshold compensation module is used for capturing the threshold voltage of the driving module to a control end of the driving module in the threshold compensation stage, wherein the threshold compensation module is an oxide thin film transistor of a second type; the data writing module is used for writing a data signal into the first end of the driving module in a threshold compensation stage; the potential control module is connected in series between the first end of the threshold compensation module and the control end of the driving module, and is used for switching off before the threshold compensation module is switched off or when the threshold compensation module is switched off in the same frame; and the potential control module is a low-temperature polycrystalline silicon thin film transistor of a second type. According to the embodiment of the invention, the light-emitting contrast of the pixel circuit reaches the standard.

The invention discloses an infrared and visible light image fusion method based on side window guided filtering, and belongs to the technical field of image processing. The method comprises the steps:carrying out the fuzzy processing of an input infrared and visible light source image through employing a Gaussian filter, and obtaining a large-scale base layer; subtracting the base layer image from the infrared and visible light source images to obtain a detail layer image containing small-scale information; calculating correlation coefficients of the infrared light source image and the visible light source image to obtain a fusion weight coefficient of the base layer, and fusing the base layer image; obtaining an initial detail layer weight graph by using a maximum absolute value rule, optimizing the initial detail layer weight graph by using side window guided filtering, and fusing detail layer images; and carrying out secondary fusion by using the fused base layer image and detail layer image to obtain a final fused image. According to the invention, the fusion of infrared and visible light images can be realized, and the fused image can maintain good contrast.

An embodiment of the invention relates to the technical field of augmented reality, in particular to a strong light simulation system and method. The strong light simulation system comprises control center equipment, a simulation chamber, a sand table field and a sand table vehicle, wherein the control center equipment is in communication connection with the simulation chamber, the sand table field and a light emitting element arranged in the sand table field. On the basis, an embodiment of the invention also provides the strong light simulation method applied to the control center equipment.The method comprises steps as follows: strong light simulation display information is acquired, the position and the angle of the light emitting element are adjusted according to the strong light simulation display information, the light emitting element is controlled to radiate a camera arranged on the sand table vehicle, images acquired by the camera in real time are acquired, and the images aretransmitted to the simulation chamber in real time for display, so that a user in the simulation chamber can check. By means of the strong light simulation system and method, the simulation degree ofstrong light simulation can be improved.

The invention discloses a display panel and a display device. The display panel comprises a plurality of pixel units as well as a light-sensitive unit and a processing chip, wherein the plurality of pixel units are distributed in a matrix manner; at least part of the pixel units comprise light emitting areas and light transmittance areas; the processing chip is connected with the output end of the light-sensitive unit; after the intensity of ambient light is sensed by the light-sensitive unit, a corresponding current signal is generated and transmitted to the processing chip; a gray scale value of a light transmittance area corresponding to the light-sensitive unit is judged by the processing chip according to the received current signal, and a control signal for controlling the gray scale of the light transmittance area to be displayed as the gray scale value is output to the light transmittance area. Due to arrangement of the light-sensitive unit and the processing chip in the display panel disclosed by the embodiment of the invention, the light transmittance rates of the light transmittance areas can be adjusted under the action of the light-sensitive unit and the processing chip, furthermore, the influence of relatively intense ambient light to a display screen can be reduced, the screen contrast ratio can be ensured, and thus the screen quality of the display panel can be improved.

The invention provides a method and device for compressing an image within a wide dynamic range. The method comprises steps of computing the local mean value of image pixels; computing the transfer function of the image pixels according to the local mean value; increasing or decreasing the original brightness values of the image pixels according to the transfer function to obtain first brightness values; increasing the contrast of the original brightness values according to the local mean value and the transfer function to obtain second brightness values; synthesizing the first brightness values and the second brightness values to obtain third brightness values; and synthesizing the third brightness values and the original brightness values to obtain fourth brightness values. The method and the device compress the image pixels within a wide dynamic range by increasing the brightness values of dark area of the image pixels and decreasing the brightness values of the bright area of the image pixels, achieve a clear and distinct image by increasing the contrast of the image pixels, achieve a natural transition effect for the image pixels by synthesis with the original brightness values, and are simple in computation and easy to be realized by integrated circuits.

The invention discloses a transparent liquid crystal display panel and a transparent display device. Firstly, the invention provides the transparent liquid crystal display panel which comprises a first optical deflection piece, a liquid crystal layer and a second optical deflection piece, and is characterized in that the transparent liquid crystal panel further comprises a color filter layer, the color filter layer is composed of arrays of color filtering pixel regions, and each color filtering pixel region is composed of a red sub-pixel region, a green sub-pixel region and a blue sub-pixel region; sub-pixel regions in the same color are non-adjacent in arrangement. Secondly, the invention provides the transparent display device which comprises a box body, a light source and an inner decorating plate, and at least one side of the box body adopts the transparent liquid crystal display panel. The transparent liquid crystal display panel and the transparent display device employing the transparent liquid crystal display panel achieve transparent display in large size, wide colour range, high contrast ratio, high transparency, and high resolution ratio of true color imaging.

The embodiment of the invention discloses a webpage reestablishing method and device based on color transmission. The method includes the steps of obtaining webpage element information of any two webpages, conducting cluster evaluation on the webpage element information to obtain an evaluation result, obtaining blocks of any two webpages, conducting color transmission on the blocks corresponding to any two webpages according to the evaluation result to obtain a color transmission result, correcting the color transmission result, and conducting webpage reestablishment according to the correction result. In the method and device, through the webpage (target webpage) which is designated by a user to be reestablished and the reference webpage which the user wants to reestablish, by means of the reestablishing method, the reestablished webpages can have the color characteristics of the reference webpage, the contrast ratio and readability of target webpage elements are ensured, and the color matching work of designers is simplified.

The invention belongs to the field of photography, and discloses an anti-glare method for a street lamp camera. The method comprises the following steps: according to a lamp structure, the location relationship between LED modules and a camera to be detected, and the distance between a light-emitting center of each LED module and the camera to be detected, selecting a structure type of lens hoods, so as to obtain a 3D model of the lens hoods; obtaining a scattering model of the camera to be detected; carrying out scattering simulation to calculate the intensity of illumination on an image-sensitive element of the camera to be detected, the total integrated scattering (TIS), and the image contrast or a PST value of the camera; according to the intensity of illumination, the TIS, and the image contrast or the PST value of the camera obtained through the scattering simulation, judging whether the structure type, the heights and the inclinations which are selected for the lens hoods meet the requirements or not; and according to the structure type, the heights and the inclinations which are selected for the lens hoods, determining the structure type, the heights and the inclinations of the lens hoods, and carrying out productization of the lens hoods. The anti-glare method provided by the invention can be widely applied in the fields of designing and manufacturing of various security street lamps.

The invention relates to a high-definition visualization method of pipe magnetic leakage data. The method comprises the steps that magnetic leakage data is collected and preprocessed to obtain pre-processed magnetic leakage detection data H; the magnetic leakage detection data H is classified to obtain classification labels of the magnetic leakage data; the classification labels C0 of the magneticleakage data are used to correct classification of the magnetic leakage data and display a sampling curve, and corrected classification labels Cnew are obtained; grayscale mapping is carried out on the magnetic leakage data locally, and an enhanced magnetic leakage data grayscale map Gnew is displayed; and pseudo color conversion is carried out on the magnetic leakage data, the grayscale values,converted from the magnetic leakage data, in different labels are converted into an RGB color space according to the corrected classification labels Cnew through the grayscale level-color transformation method by taking the different classification labels as grayscale value division intervals, and a pseudo color image of the magnetic leakage data is displayed. The curve map display effect is improved, the visualization effect of the magnetic leakage data is improved, characteristic information of magnetic leakage signals is reserved completely, the data display efficiency is improved, and thememory burden is alleviated.

The method relates to a method for carrying out the global color calibration on a plurality of video cameras, belonging to the field of computer multimedia technologies. A calibrant is placed in the center of a scene, and N video cameras acquire an image from the calibrant in the center of the scene. The color calibration process comprises the following steps: calculating global correspondences ofall video cameras by applying a feature point detection method and relevant methods based on areas; establishing overdetermined linear equations based on the color consistency and the dynamic range constraint; and setting the obtained calibration parameters into all video cameras. The calibrant used in the method is simple, flexible and convenient for carrying; the color calibration process has simple algorithm routines, is easy to realize and fully automatic; and the color calibration merges the feature point detection method and the relevant methods based on areas together, thereby obtaining the high-precision global correspondences. The calibrant in the method and the color calibration method can be applied to any multi-video-camera array system, thereby achieving the color consistencyand the high-contrast calibration of all cameras.

The invention discloses an achromatic algorithm capable of maintaining the contrast ratio, color consistency and gray pixel characteristics. A contrast ratio maintaining energy item between pixel pairs is constructed through a double-Gauss model so as to maintain the structure and local contrast ratio information of an original image; meanwhile, a color consistency constraint energy item is constructed through a local linear embedding model to ensure that pixels in consistent colors in the original image have the same gray level in a result image; in order to maintain the gray pixel characteristics, gray pixels in the original image are marked out first, it is forcibly specified that gray values of the gray pixels are known and equal to R all the time in the achromatic transformation process, and then the double-Gauss model is used for constructing a gray characteristic maintaining energy item between the gray pixels and the other pixels. The three energy items are linearly combined to obtain a target energy function, then the gray value for obtaining a minimum total energy value is solved through an iterative method, and therefore a final achromatic result is obtained.

The invention provides a display device which comprises a display area and a non-display area surrounding the display area. The display area comprises multiple pixels, a first substrate, a second substrate and a liquid crystal layer. A first polarization structure is arranged at one side of the first substrate, and a metal wire is arranged at the other side of the first substrate and respectivelydisposed between two pixels and / or in a border area. The second substrate is arranged opposite to the first substrate; a reflective layer is arranged at the side, close to the first substrate, of the second substrate. The liquid crystal layer is arranged between the first substrate and the reflective layer. The first polarization structure comprises a 1 / 4 wave plate and a first polaroid, whereinthe phase difference of the 1 / 4 wave plate is equal to 1 / 4 gamma, the phase difference between second ray and the 1 / 4 wave plate is equal to 1 / 4 gamma so that the second ray is absorbed by the firstpolarization structure, and the gamma refers to visible wavelength. The first polarization structure is improved, a black matrix is omitted, and thus cost reduction is facilitated.

The invention is suitable for the optical technology field and provides an optical imaging system and a target simulation system. The system comprises a polarization light splitting device, a miniature display module, a first polarized light source module and a second polarized light source module, wherein the polarization light splitting device is formed through gluing one pair of rectangular prisms, and a light splitting surface is formed at the bonding position of the rectangular prisms; the miniature display module is formed through splicing two same miniature displays; the first polarizedlight source module and the second polarized light source module are arranged on two adjacent equivalent focal planes of the polarization light splitting device; the P light of the first polarized light source module is vertically emitted into the polarization light splitting device and completely passes through the light splitting surface; the S light of the second polarized light source moduleis vertically emitted into the polarization light splitting device and is reflected at a 45 degree angle on the light splitting surface; the emitting directions of the S light and the P light form a 90 degree angle; and the P light and the S light finally generate an image in the miniature display module. In the invention, through an optical splicing technology, the resolution of the optical imaging system is increased, simultaneously, the size of the optical imaging system is reduced and weight is mitigated.

The invention discloses a low-dose whole-body PET image enhancement method based on a self-inverse convolution generative adversarial network, and the method comprises the steps: training a model through employing a collected low-dose PET image and a collected full-dose PET image, testing the model through the low-dose PET image and a training result, storing the testing result, and obtaining a low-dose PET image enhancement result. According to the method, the mutual conversion between the low-dose PET image and the full-dose PET image is realized by using the self-inverse neural network, andthe trained network has the self-inverse property, so that the noise in the images can be effectively reduced, the image contrast can be effectively maintained, and the robustness of the model is effectively improved. The network model is simple in structure and high in calculation efficiency, noise in the image can be effectively reduced, image details and contrast are effectively reserved, andthe quantitative error is lower than 10%.

The invention provides a black matrix forming method, a display module and a display device. The black matrix forming method comprises the steps that a black target material is placed on a platform with a magnetic field; a target plate and the black target material are oppositely placed, and the face, where a black matrix is to be formed, of the target plate is opposite to the black target material; and a first region, corresponding to a light-emitting device, on the target plate is covered by using a mask, and the black target material is deposited on the surface of the target plate through magnetron sputtering to form the black matrix. The black matrix is formed through magnetron sputtering and the mask, the precision is high, the thickness of the formed black matrix can be small, the light transmittance can be low, and the light emitting effect and the contrast ratio of the display module can be guaranteed.

The invention provides a method for setting a pretilt angle of liquid crystal molecules, comprising the following steps of: step 1, providing a liquid crystal material, a CF (Color Filter) substrate and a TFT (Thin Film Transistor) substrate; step 2, arranging the CF substrate and the TFT substrate in parallel to form a receiving gap, and filling the liquid crystal material in the receiving gap to form a liquid crystal box; step 3, providing a driving control circuit capable of generating a plurality of driving voltages, and electrically connecting the driving control circuit with the TFT substrate; step 4, providing a small-amplitude oscillating device and an ultraviolet light source variable in irradiation intensity, and arranging the liquid crystal box on the small-amplitude oscillating device; step 5, starting the small-amplitude oscillating device so that the liquid crystal box generates small-amplitude oscillation, closing the driving control circuit and employing the plurality of driving voltages to drive the liquid crystal material, and simultaneously, irradiating the liquid crystal through the ultraviolet light source by different intensities; and step 6, performing the operation of the step 5 not less than one time on the liquid crystal box, thereby completing the setting of the pretilt angle.