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摘要：Encapsulated cholesteric liquid crystal (CLC) film is prepared by means of polymerization induced phase separation (PIPS) method. The electro-optical properties of encapsulated CLC on glass and plastic substrates have been studied in detail, mainly focusing on the driving voltage, reflection and contrast ratio. It shows that no matter on glass or plastic substrate, the encapsulation contributes to improving the display contrast, though the driving voltage accordingly increases. In comparison with the glass substrate, the driving voltage of the encapsulated CLC on the plastic substrate increases from 70 V to 200 V, while the contrast ratio arrives to 6.2:1. In conclusion, our present goal has been achieved on flexible display based on CLC.  

摘要：The transmission process of light in micro-sphere structure, micro-structure and micro-pyramid structure were analyzed. The transmittance and uniformity of micro-sphere structure, micro-cone structure and micro-pyramid structure were compared based on Light Tools software. At last, the effect of vertex angle γ and cutting quantity H of micro-pyramid structure on uniformity and transmittance of diffuser were simulated. The result shows that the uniformity of micro-pyramid structure is the best while the transmittance is worse than micro-sphere structure. The transmittance becomes higher when the vertex angle γ becomes higher. The transmittance is 82.1% and the uniformity is 82.4% when γ=100°.The transmittance becomes higher when the cutting quantity H becomes higher while the uniformity increases first and decreases latter. The transmittance is 84.2% and the uniformity is 86.2% when H=0.04 mm.  

摘要：Sheet-like ZnO crystal was prepared by homogeneous precipitation two steps method without any metal catalyst. Drying at 105 ℃, then annealing at 400 ℃, we can get the two samples with the two different heat treatment temperature. In order to investigate the influence of heat treatment temperature on sheet-like ZnO crystals, we used X-ray diffractometer, scanning electron microscopy, transmission electron microscope, ultraviolet-visible-near infrared spectrophotometer and fluorescence spectroscope to characterize the structure and optical properties of the two samples. The results reveal that the product is highly crystalline with hexagonal wurtzite phase and has the appearance of regular hexagon shape at (0001) plane. The crystallinity of sheet-like ZnO crystals was enhanced and the energy band gap was decreased with the annealing temperature increasing from 105 ℃ to 400 ℃. What's more, the near band gap peaks were red shift in the photoluminescence spectrum with the increasing of the annealing temperature.  

摘要：A new display technology is being developed that uses quantum dot materials. Quantum dot LED (QD-LED) has the advantage of potential high-efficiency emission, long life-time, energy saving and cost-effective. This paper presents the basic principle and pro-perties of QD-LED, as well as broad prospects and scope in the displaying industry.  

摘要：Organic light-emitting devices (OLEDs) are extremely sensitive to vapor and oxygen. The influence of inleakage of vapor and oxygen which can corrode organic functional layer and the electrode material on device's lifetime was serious. Based on the requirements of encapsulation materials, this paper analyzes the most promising OLEDs encapsulation technology —thin film encapsulation, which mainly focuses on the classification and research status.  

摘要：The effects on the PR ashing rate, uniformity and H/V ratio were researched in process of ECCP dry etch model when the gas flow rate and pressure changed. The results show that PR ashing rate and the value of H/V would enlarge with the increasing pressure in a certain range. At the same time the uniformity also gradually changed for the better. The ashing rate would first increase and then decrease when the SF₆ flow rate increased. But in this time the value of H/V had one contrary law. The PR ashing rate did not change significantly but the value of uniformity became smaller gradually when increased the O₂ flow rate only. When the flow rate of SF₆ and O₂ increased but had one constant low proportion, the etching rate of PR increased first and then decreased, the uniformity and H/V ratio had one opposite change.  

摘要：The dependence of Zara and Rubbing Mura on Rubbing intensity has been studied. The experimental result show that, when Rubbing intensity is low, Zara easily occurs, and when rubbing intensity is high, rubbing Mura easily occurs. By selecting the right rubbing intensity, the incidence of Zara and rubbing Mura can be reduced. In addition, through using FIB to observe the surface of the substrate, it is found the reason of FFS product prone to occur Zara and Rubbing Mura  

摘要：The paper introduces the principle of driving circuit of switching power in peak current control mode. When duty-cycle is D>50%,the reasons for instability and oscillation in the system are analyzed,the relationship of the inductor current slope,duty-cycle and system stability is discussed. The way of slope compensation is applied to realizing stability of driving circuit in peak current control mode and the principle of slope compensation and design step and compensation circuit is given.Finally,the paper gives a practical slope compensation circuit of fly-back converter controlled by UC3842.The result of simulation and expe-riment shows that slope compensation circuit can realize switch power stability in peak current control mode when duty-cycle is D>50%,and can ensure stability of system and ability of anti-interference.  

摘要：Segmentation to adhesion cells is critical in image segmentation realm,with the morphology was used in image segmentation,watershed becomes one of the most efficient skills in solving adhesion cells. However,the traditional watershed algorithm is apt to cause over-segmentation for the noise and irregular shape of macrophages.If extracting the "seeding points" from the distance map,and combining some "seeding points" into more reasonable "seeding points" by a certain criterion that the neighbor "seeding points" should be combined to one "seeding point" if the distance between the two points is under threshold which is got from the information the distance map indicates.And redistribute distance map depending on the "seeding points" before watershed,the simulation results show that the algorithm can effectively segment adhesion macrophages as well as restrain the over-segmentation phenomena with a little more time compared with the traditional method.After segmentation,we can mark the numbers to the cells and abstract the characteristic parameters such as circumference、area、roundness factor 、mean gray and so on.  

摘要：In order to realize the speediness display collected by the area array CCD, a fast display system based on field-programmable gate array (FPGA) is presented. Using FPGA to build-up soft core processor and using appropriative IC module AD9929 as the driver processing chip of CCD, and then it designs the driver circuit according to the interface time order of TFT liquid crystal screen and chip AD9929. Finally, the speediness display of collected data can be realized through DMA technique. The testing results of circuit show that this method can make the collected data by area CCD rapidly display on the TFT liquid crystal screen, which has widely applications in the industrial field surveillance.  

摘要：In order to solve the problem that the remote sensing camera image data for the frequency of 100MHz high-speed aerospace instantaneous parallel storage, a multi-channel high-speed short blanking period of the CCD image data storage method. This method to FPGA for data processing and control of the core, the first image data from various quarters parallel storage to SDRAM array, and then by road to read out image data stored by the capture card to the host's hard disk; the input image data into memory bit wide SDRAM read and write clock frequency is reduced to approximately of the original SDRAM capacity increase of times; using string conversion and string conversion operation combined with the asynchronous FIFO data interface of different clock domains to address the high speed image data non-integer multiple of the bit wide conversion problems, and given a minimum depth of SDRAM lowest operating frequency and asynchronous FIFO formula. Research and application results show that the design meets the application requirements, and has been successful in a particular space camera linear CCD ground inspection system, in parallel to receive the total data rate up to 4.13Gb / s.  

摘要：In order to speed up video encoding, a new fast algorithm is proposed, on P-frame mode decision which has high complexity in H.264/AVC. In the proposed algorithm, the check range of candidate inter modes are reduced gradually through the following two steps: the monotonicity check of Jmode and the selection of horizontal or vertical orientation based on sub-blocks’ motion vector (MV). Meanwhile, an intra mode checking method based on the best inter mode is proposed, which check intra modes selectively. Thus, it is avoided effectively that checking unnecessary modes. The experiment results show that, compared with exhaustive mode decision algorithm in the JM, the proposed algorithm reduced the encoding time about by 63.80% on average, while brought negligible performance degradation.  

摘要：The Acrylate resin layer has lower dielectric constant（ε≈3.5）,better optical transparency, and can be spin coated as a flat surface film easily. By using resin as passivaion layer in the array process, we make it increase the vertical gap between the Common ITO and bus line and plannar the devices. This reduces unwanted capacitive coupling and enables the pixel electrode to be extended over the gate and data lines, thus increasing aperture area, specifically decreases power. In this work, there were some problems between the resin passivation layer and pixel ITO, such as Mo attack, missing ITO and so on. After optimizing the process of ITO Etching, photosensitive resin and non-photosensitive resin perfectly match with ITO etchant and Resin Coating, we stressfully has applied the resin passivation layer to the TFT -LCD.  

摘要：A dual-gate + Z-inversion (DZi) driving method was proposed to reduce power consumption of thin-film transistor liquid crystal display (TFT-LCD). The power saving principle of DZi driving was researched, and the structure design and circuit design were finished, and 14.0-inch WXGA (1366RGBx768) samples were manufactured, and the power saving effect was measured and analyzed. As results, DZi can save TFT-LCD power consumption in effect, such as panel AVDDS power reduces 70% (191mW) when display color-bar pattern. Moiré phenomenon that appeared in DZi module was analyzed, and solutions were proposed. The research established a driving method and design reference for lower power consumption in TFT-LCDs and other displays.  

摘要：A green organic light emitting device(OLED) with the structure of ITO/MoO₃(x nm)/N,N'-diphenyl-N,N'-bis(1-naphthyl)-(1,18-biphenyl)-4,4-diamine(NPB)(40 nm)/tris(8-hydroxyquinoline)aluminum(Alq₃)(60 nm)/LiF(1 nm)/Al(150 nm) have been fabricated by vacuum deposition method,x=0,5 nm. The detail process has been described. It was found that the treatment on the surface of ITO substrates by oxygen plasma can effectively reduce the contact angle of the ITO surface in the experiments. By measuring and analyzing the performance of luminescence and electrical of device, the influences of the hole injection layer MoO₃ on device performance was investigated. Experimental results show that HOMO level of MoO₃ can reasonably match ITO work function,which reduces the hole-injecting barrier and improves the brightness and efficiency of device. When forward voltage is less than 10 V, the current density of device does not change significantly with the voltage increases; When the voltage is more than 10 V, the current density increases significantly. The chroma of device stabilizes in green light district of(0.36, 0.55) with the changes of the driving electric voltage.  

摘要：In order to acquire the life information of white OLED, two constant and one step stress accelerated life tests (ALT) were conducted with current stress increased. Weibull Distribution function was applied to describing the life distribution, Bilinear Regression Method (BRM) was employed to estimate the Weibull parameters, and the accelerated life equation was determined. The Kolmogorov-Smirnov test was performed to verify whether the White OLED life met the Weibull distribution or not, and the software developed by authors was used to calculate the average life and median life. The numerical results indicate that the test plans of constant-step ALT are feasible and versatile, that the OLED life follows the Weibull distribution, and that the life-stress relationship satisfies linear Arrhenius equation completely. The precise accelerated parameter is shown to be particularly useful to predict the OLED life within shorter time.  

摘要：Consistency of pixel brightness is an important index for LED display. For LED display with un-ideal consistency of pixel brightness, to get pictures file including brightness information by taking photograph, via computer, background can be de-noised, pixel can be positioned, and even information about brightness can be obtained, thus getting file about brightness data, and finally, handled by computer and database, the Excel brightness corrected file will be made. The brightness file corrected in Excel format can be convenient to deliver to the controller of LED display where it will be corrected point by point. In this way, the visual effect of LED display could be greatly improved.  

摘要：For solving the problem of displacement estimation for out-of-focus blurred images, the method of image registration based on phase-only correlation is introduced. The method is based on the translation characteristics of Fourier transform to search translation between images, the inverse Fourier transform of the normalized cross power spectrum of pairs images is a two dimension impulse function, and the translation displacement between images can be finely retrieved from the location of the correlation peak. The method of image registration of phase-only correlation combined with degradation model of spatially variant blur, the mathematical expression of PSF and OTF for out-of-focus blur is described, and the effect of blur on registration is discussed. The relation between variance of normalized cross power spectrum and degradation of blurred images is demonstrated, which is only dependent on the displacement between images and not on the blur in image.The experimental result shows that this method can detect sub-pixel-level shift parameters accurately and efficiently,the maximum error of registration is only 0.339-pixel. It is efficient and satisfies the system requirements.  

摘要：For a large number of defocused images in films and televisions, the paper proposes a method for depth map extraction of defocused image. Firstly, the focused foreground is separated from the defocused background in a defocused image. For the defocused background, a method for depth map model matching is presented, a depth map model is constructed, and the background and the corresponding depth map model is matched with the help of human's sensitive judgments on the scene depth. The paper also presents the depth map reprocessing based on color segmentation to improve the accuracy of the depth map of the scene. Finally, for the focused foreground, we assign a single value to be the depth in the area of the foreground, and produce the final depth map with respect to background depth map. The experiment shows depth maps obtained by the proposed method have good results in the areas of depth smooth and depth jump.  

摘要：In the application of remote sensing cameras, the grayscale distributions of the transferred images are normally bad. In order to solve this problem, some researches are carried out. The factors that affect the grayscale distribution are analyzed, and three methods are proposed for background subtraction and grayscale stretch based on the parameters of remote sensing camera's imaging electronics. The richness of gray levels of the three methods is formulated, and the optimal method is given. That is, analog stretch is implemented together with digital stretch and all the processes are based on the images with original bits of ADC. Then the lowest some bits are abandoned, and the images with the remaining bits are transferred down to earth. The experiments are made based on an actual remote sensing camera's imaging electronics system in laboratory. The results indicate that the proposed three methods can all achieve the functions of background subtraction and grayscale stretch. The third method brings more gray levels to images than the other two, and leads to better imaging quality. Further, it can be applied in the remote sensing cameras.  

摘要：According to the disadvantage of poor real-time of hyper-spectral image compression system, a new hyper-spectral image compression system based on bit-plane is presented. For the high-bit-plane, first DPCM to relevant is used, then the run-length encoding is done. For the low-bit-plane, the Quad-split algorithm is adapted, then the LZW encoding is done. Finally the mixed steam is given. An embedded high speed image compression processing system on high performance DSP TMS320C6455 and FPGA was designed. Experimental results with real images shows that the reconstruction of the system maintains a high accuracy, and the system can reduce the amount of running the algorithm, the running time of the program is shorter, so it can meet the requirements in the project.  

摘要：Global Motion Estimation is an important tool widely used in computer vision, video processing, and other fields. To reduce the computational complexity of global motion estimation, a global motion estimation method based on the pixel gradient strategy was proposed. With regard to global motion models, six-parameter affine model is adopted because of its reasonable tradeoff between complexity and accuracy. In order to accelerate the algorithm, two-level pyramid is utilized in the calculation. It uses those gradient bigger pixels in the calculation of every pyramid level, and combines Gauss-Newton algorithm. The extensive experiments show that the proposed method is efficient and robust in terms of both computational complexity and accuracy.  

摘要：The use of silicon nitride (SiN_<em>x) in the field of touch sensor has been investigated. Silicon Nitride (SiN_<em>x) with different thickness is deposited on the surface of bare glass by plasma-enhanced chemical vapor deposition technology. Using theoretical analysis and experimental test method, this article illuminates the impact on the touch sensor of transmittance and macro-color caused by film thickness and the refractive index. The results show that the refractive index of SiN_<em>x has great impact on the average transmittance, while the film thickness has no obvious effect on it. The film thickness has great impact on transmittance at fixed-wavelength and the macro-color, and it is crucial to the process control.