最新刊期
期 11 ， 2018
- 摘要：
For the special requirements of the high dynamic range local dynamic dimming in the side-lit backlight, this paper proposed the structural light guide plate matching the LED light bars to spotlight, improving the backlight contrast and realizing the divisional dimming control of the liquid crystal display. First, based on the surface brightness distribution of the existing light guide plate, the microstructure surface of the light guide plate was designed as a zigzag shape. In order to analyze the influence 关键词：local dynamic dimming;structural light guide plate;side-lit;spotlight- 323
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发布时间：2020-08-12 - 摘要：
The temperature variation can affect the phase modulation characteristics and response speed of the liquid crystal wavefront corrector of adaptive optics, thereby affect its phase modulation accuracy. To solve this problem, the influence of temperature on the LUT (look-up table) of a 512×512 pixel silicon-based liquid crystal wavefront corrector (LCOS) was measured experimentally and analyzed. It is due to the change of the LUT induced by temperature that changed the phase modulation characteristics of the 关键词：liquid crystal spatial light modulator;phase modulation;adaptive optics- 325
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发布时间：2020-08-12 - 摘要：
Silver nanowires (AgNWs) are regarded as one of the promising alternatives to traditional indium tin oxide as transparent conductive materials because of its outstanding opto-electronic and mechanical performances. In order to improve the adhesion, flexibility and stability of AgNWs films, we proposed a facile transferring and alkanethiolate based self-assembled process to fabricate the AgNWs-epoxy resin (EPR) composite film. Firstly, surface energy of the temporary substrate was modified by trichloro(octad 关键词：silver nanowires;transferring;stability;flexible touch- 420
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发布时间：2020-08-12 - 摘要：
Back channel etched (BCE) amorphous InGaZnO (a-IGZO) can be fabricated with fewer photolithography masks and achieve smaller parasitic capacitance. However, the back channel of the BCE a-IGZO TFT is vulnerable to acid and plasma damage, which leads to problems of TFT uniformity and stability. In particular, with the introduction of gate driver on array (GOA) technology, it is increasingly urgent to improve the electrical uniformity and stability of TFTs. Therefore, it is an urgent requirement for technology 关键词：BCE a-IGZO TFT;215.9 mm(85 in);8K4K;GOA- 477
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发布时间：2020-08-12 - 摘要：In order to improve the color rendering index of light source, a full spectrum LED light source of COB package is designed and manufactured, by adding the peak wavelength 415 nm of violet LED chip and luminous peak wavelength 497 nm and 655 nm phosphor, the energy distribution of common LED light source in the spectral range of violet, blue-green and red light is make up. The experimental results show that the luminous efficiency is 103.34 lm/W, the color index of the full spectrum LED is as high as 99.38, and it is close to the color index of sunlight, which can meet the requirement of high quality illumination.关键词：COB package;full spectrum LED light source;color-rendering index
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发布时间：2020-08-12
Material and Device
- 摘要：Back channel etched (BCE) amorphous InGaZnO (a-IGZO) can be fabricated with fewer photolithography masks and achieve smaller parasitic capacitance. However, the back channel of the BCE a-IGZO TFT is vulnerable to acid and plasma damage, which leads to problems of TFT uniformity and stability. In particular, with the introduction of gate driver on array (GOA) technology, it is increasingly urgent to improve the electrical uniformity and stability of TFTs. Therefore, it is an urgent requirement for technology and market to develop high reliability BCE IGZO TFTs. The electrical characteristic of the BCE configuration based a-IGZO TFTs were studied. The passivation layer, the selection of color filter material and design of GOA TFT structure were modified for lessening the influence of H2O molecules adsorbing on the back channel of the BCE-structure. The negative and positive bias temperature stress(N/PBTS) results revealed that the optimized GOA TFTs exhibited good device reliability-the Vth shift under gate voltage of -30 V at 80℃ is less than 1 V for 2 000 s. Finally, a high performance 215.9 mm(85 in) 8K4K 120 Hz GOA LCD was demonstrated.关键词：BCE a-IGZO TFT;215.9 mm(85 in);8K4K;GOA
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发布时间：2020-08-12
- 摘要：
This paper presents a method to detect blade assembly quality in a vane pump by features of the combination of Gabor and gray level co-occurrence matrix. Firstly, the blade image dataset is constructed, and the image is filtered by five-scale and four-direction Gabor filters. The amplitude feature map is calculated on the basis of the filtered image, and then the gray level co-occurrence matrix feature of the amplitude feature map is extracted. Finally, we combine and normalize the features extracted from e 关键词：gabor transform;vane pump;gray level co-occurrence matrix;support vector machines;feature combination- 340
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发布时间：2020-08-12 - 摘要：
Aiming at the shortcomings of digital down-conversion (DDC) module such as low precision, expensive logic resources and difficult to process the digital intermediate frequency (IF) signals in real-time when using spectrum analyzer to monitor spectrum, this paper optimizes the mixer module of the traditional digital down conversion system and proposes an efficient one. Firstly, the sampling rate of the analog-to-digital converter (ADC) is set to 4 times the carrier center frequency, while the sampling conver 关键词：spectrum monitoring;digital down conversion;mixer;decimation filter- 342
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发布时间：2020-08-12 - 摘要：Nearest neighbor search is becoming more and more important in large scale image retrieval.Many hash methods are proposed in nearest neighbor search owing to fast query and low memory. However, there is a lack of research on the sparse structure of data in the process of hash function construction. The proposed hashing method introduces the sparse construction process into the learning process of hash function and uses KL distance of sparse autoencoder on hash code sparse constraints to enhance locality preserving discriminant mapping process. The proposed method leverages L2 norm to control quantization error in hash encoding. The experimental results on two common image retrieval datasets CIFAR-10 and YouTube Faces show that the proposed algorithm is superior to other unsupervised hashing algorithms.关键词：image hashing;sparse autoencoder;KL distance;quantization error;unsupervised algorithm
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发布时间：2020-08-12 - 摘要：
With the growing of 3D display, more and more products based on 3D display are used in various fields, for example, 3D movies, auto-stereoscopic television, 3D surgery, etc. Human-computer interaction (HCI) system based on 3D display is also a popular research direction in recent years. However, most of these systems don't use depth information as a clue for interaction which limit interaction orientation into a 2D plane. To extend control on depth direction, a novel HCI system based on 3D display is presen 关键词：visual angle deviation correction;3D display;human-machine interaction;face detection;pupil position estimation- 338
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发布时间：2020-08-12 - 摘要：
Aiming to the automatic recognition of cervical cell cluster, a smart recognition method based on YOLO v2 model was proposed. At first, the model resnet50 was used as basic feature extraction module according to the characters of cervical cell cluster recognition task. Meanwhile, the related data amplification and training program of YOLO v2 network were also proposed. At the same time, we collect the scan image of cervical cell liquid base smear to build the cervical cell cluster image data set and the cel 关键词：cervical cell cluster;data augmentation;Resnet 50;YOLO v2- 368
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发布时间：2020-08-12
Image Processing
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