最新刊期
期 3 ， 2019
- 摘要：
The quantum dot color filter membrane structure was simulated. The conversion efficiency of quantum dot film to backlight and the influence of external structure on light intensity and color gamut were researched. Two different band-pass distributed Bragg reflector structures were proposed on top and bottom of quantum dot film. Firstly, the parameters of red/green quantum dots were imported through the optical simulation software, the conversion model of quantum dot color filter was constructed, and the lay 关键词：quantum dots;color filter;light color conversion;distributed Bragg reflector- 360
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发布时间：2020-07-05 - 摘要：The high thickness PS material was studied, through process optimization, 60~120 μm high PS was prepared successfully in the G5 line. By tuning of VCD & softbake process and curing process, high PS material of no bubble and good membrane surface was obtained. The intensity of exposure influence on the PS was also studied in this paper. When lower than 50 mJ, PS material cannot shape effectively, when amount to 150 mJ, high PS with good appearance, to meet the design value, was received. Finally, the different base of high PS material was studied. When the base did not deal with tackifier, the adhesion of SiN basal was good, but the adhesion of Mo base still needed to optimize the processing.关键词：liquid crystal lens;LC antenna;PS material
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发布时间：2020-07-05 - 摘要：Based on the pixel leakage phenomenon of advanced super dimension switch (HADS) products, the main causes and mechanisms of pixel leakage caused by HADS products were analyzed. Through the analysis, it is found that the light leakage of the HADS product is mainly caused by the difference in transmittance caused by the abnormal alignment angle of the rubbing weak region liquid crystal. Based on this, the two directions of improvement of Rubbing direction optimization and PS shape optimization are provided for the better picture quality of HADS products.关键词：pixel leakage;rubbing weak region;liquid crystal alignment
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发布时间：2020-07-05 - 摘要：
The synthesis of a new polyimide liquid crystal vertical alignment agent substituted with adjacent double long side chains was reported, and its performance for liquid crystal display elements was investigated. First, 2, 3, 4-trifluoronitrobenzene, 4-(4-heptylcyclohexyl)-phenol, phthalimide potassium salt and other raw materials were used to synthesize a functional diamine (L-14) substituted with adjacent double long side chains. The diamine L-14 was characterized by NMR and HPLC-MS. Then a kind of polyimid 关键词：substituted with adjacent flexible long side chains;polyimide;liquid crystal display element;liquid crystal- 342
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发布时间：2020-07-05 - 摘要：
In order to increase the production categories of our company and to put RGBW product into market as soon as possible, the key RGBW CF technology was researched. Firstly, through factory verification tests, the key process parameter differences of RGB-W thickness were decreased from the over coating (OC) material characteristics, OC thickness designations, and OC process conditions, etc. the data models of pixel pitch/OC thickness and differences of RGB-W thickness was established. Secondly, the connections 关键词：RGB-W thickness difference optimization;capacity up;yield up;design optimization- 357
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发布时间：2020-07-05 - 摘要：
With the development of high resolution TFT-LCD HADS products, a kind of Mura which is closely related to the pattern of ITO, occurred frequently. The Mura has bright and dark (black and white) brightness differences, and there is a black and white reversal phenomenon in different viewing angles. After measuring and simulating the parameters of the unaccepted products, the reason is concluded that the pixel electrode ITO (1ITO) pattern and the common electrode ITO (2ITO) figure in the pixel open area have d 关键词：black and white Mura;overlay;ITO;electric field;uniformity- 397
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发布时间：2020-07-05 - 摘要：
Zara Domain is a severe problem in the TFT-LCD production process, especially in the TN production, and already has a great influence on the production yield of the products. In this paper, Zara Domain problem was systematically analyzed and studied by a large number of experiments on 101.3 mm(3.97 in) TN products. The results show that the optimization of product design, process parameters and process control can effectively control the incidence of Zara Domain. Firstly, by adjusting the etching process in 关键词：Zara Domain;polyimide;weak zone;quick cooling- 328
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发布时间：2020-07-05 - 摘要：The Emboss Mura is investigated systematically, the mechanism is found, and the effective measures to improve Emboss Mura are established. Firstly, electrical properties of Mura were tested by means of semiconductor parameter testing equipment and changing voltage and frequency. Then, the gate insulator properties were confirmed by scanning electron microscopy (SEM) and ellipsometer. Finally, Mura morphology and composition on the back of glass substrate were tested by SEM and X-ray photoelectron (EDS), and a reasonable explanation for the causes of Mura is given, effective improvement measures are put forward. The results show that Emboss Mura is formed by scratching the back of the glass on the bottom electrode emboss and sticking the scratches with the scratch debris. By changing the shape, structure and material of bottom electrode emboss, cleaning bottom electrode, optimizing electrode temperature and increasing PI film thickness, Emboss Mura ratio can be greatly reduced.关键词：Emboss Mura;bottom electrode;scratch
- 385
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发布时间：2020-07-05
Materials and Devices
- 摘要：
Depth of field of traditional optical systems is limited, it is hard to achieve a wide field image with high resolution. A novel fusion method of multi-focus image based on Laplacian pyramid transform which evaluated by the metrics of regional variance and Point sharpness (EAV) was proposed. The fusion method firstly performs Laplacian pyramid transform on multiple source images, and feature information at the layers with different frequencies were extracted. Then, the multiple source images were fused by u 关键词：image fusion;multi-focus image;Laplacian pyramid transform;regional variance;EAV- 323
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发布时间：2020-07-05 - 摘要：
In order to eliminate the influence of uneven illumination on image edge detection, an edge detection method based on logarithmic domain gradient and improved Sobel operator was proposed. Firstly, the image was transformed into logarithmic domain to enhance the brightness of the image by weakening the low-frequency incident component and enhancing the high-frequency reflection component. Then, the improved 4-direction Sobel operator was synthesized and the gradient is expressed by infinite norm, so as to ma 关键词：edge detection;logarithmic domain;improved Sobel algorithm;uneven illumination;Bernsen algorithm- 363
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发布时间：2020-07-05 - 摘要：
In order to solve the influence of scale change on target tracking, a multi-scale target tracking algorithm was proposed based on the color feature tracking algorithm. The algorithm realized adaptive scale tracking by training position and scale correlation filters. Firstly, the target center position of next frame was obtained by computing the maximum of the response, where the position correlation filter was learned by the least squares classifier and the dimensionality reduction for color features was an 关键词：target tracking;color feature;principal component analysis;scale adaptation- 315
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发布时间：2020-07-05 - 摘要：
The optical lens distortion correction method used in shooting range treats Quasi systematic error as the accidental error, and can only fit distorted curve in the local region, can not use a curved surface function to describe the problems such as the whole change characteristics of distortion accurately. To solve this problem, a method of least square collocation based on polyhedral function was proposed. Firstly, the method used polyhedral function to fit the trend term of the least squares collocation. 关键词：optical lens distortion correction;least square collocation;polyhedral function;covariance function- 341
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发布时间：2020-07-05 - 摘要：
To achieve the accurate real-time restoration of Bayer image from the output of large area array and high frame CMOS camera, restore its true color and reduce the color distortion of the whole image (especially the edge image), this paper proposes an algorithm that can accurately restore image colors as well as minimize complexity of algorithm. Firstly, the algorithm preprocesses the target image, that is, expands the image and use a unified algorithm to restore the entire image to reduce the amount of comp 关键词：Bayer image;color filter;gradient interpolation;FPGA- 308
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- 12
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发布时间：2020-07-05 - 摘要：
Electrowetting electronic paper shows insufficient gray scale and poor image contrast due to ink reflow phenomenon. In this paper, an error diffusion algorithm based on pixel neighborhood gray information was proposed for electrowetting electronic paper display. Firstly, the image contrast was improved by histogram equalization processing. Then, based on the classical error diffusion algorithm, the original fixed threshold was adjusted according to the current pixel's neighborhood average gray level, the di 关键词：electrowetting electronic paper;gray level;error diffusion;neighborhood gray information- 354
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发布时间：2020-07-05
Image Processing
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