Zhangtao Wang

ORCID: 0000-0001-5600-9651
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About
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Research Areas
  • Photonic Crystals and Applications
  • Surface Roughness and Optical Measurements
  • Liquid Crystal Research Advancements
  • Thin-Film Transistor Technologies
  • Photonic and Optical Devices
  • Semiconductor Lasers and Optical Devices
  • Color Science and Applications
  • Industrial Vision Systems and Defect Detection
  • Advanced optical system design
  • Silicon and Solar Cell Technologies
  • Advanced Optical Imaging Technologies
  • Underwater Vehicles and Communication Systems
  • Water Quality Monitoring Technologies
  • Indoor and Outdoor Localization Technologies
  • Optical Network Technologies
  • Phase-change materials and chalcogenides
  • CCD and CMOS Imaging Sensors
  • Semiconductor materials and devices
  • Mechanical and Optical Resonators
  • 3D IC and TSV technologies
  • Piezoelectric Actuators and Control
  • Aerospace Engineering and Energy Systems
  • Material Properties and Processing
  • Flow Measurement and Analysis
  • Electrowetting and Microfluidic Technologies

BOE Technology Group (China)
2016-2025

Beihang University
2017-2024

Bohai University
2020

Anyang Normal University
2014

Institute of Semiconductors
2003-2005

State Key Laboratory on Integrated Optoelectronics
2003-2004

Chinese Academy of Sciences
2003-2004

Superficial flow velocity perception is inspired by aquatic organisms and has become increasingly important for underwater robots vehicles. Existing marine electromagnetic velometers require very large AC coils with high power consumption excitation, limiting their mobility applications. Permanent magnet excitation preferable miniature sensors because of low consumption, small size, sensitivity. However, permanent not been applicable due to the output drift caused electrode polarization...

10.1109/tim.2023.3304692 article EN IEEE Transactions on Instrumentation and Measurement 2023-01-01

Inspired by the flow perception ability of underwater organisms' lateral line system (LLS), recently, artificial (ALLS) has shown highly competitive application prospects in AUVs. However, existing ALLS contains lots movable parts, which are easily damaged and entangled will generate resistance to AUV carrier. Moreover, mainly focus on vibration object detection, while studies more common valuable translational moving objects relatively less. In this article, a novel practical theory for...

10.1109/jsen.2024.3370259 article EN IEEE Sensors Journal 2024-03-04

Abstract The impact of pixel leakage current and liquid crystal flexoelectric effect on flicker were studied with simulation measurement methods. rule architecture, TFT voltage, electrode design, material, driving signal, other factors is obtained, the key under different conditions are identified. design mixture development scheme proposed, a strategy data voltage modulation at blanking period combined frequency‐wise ACC brightness compensation established to reduce flicker. Based proposed...

10.1002/jsid.2051 article EN Journal of the Society for Information Display 2025-03-31

Mesoporous ZnS-NiS composites are prepared via ion- exchange reactions using ZnS as the precursor. The mesoporous composite materials have large surface areas (137.9 m(2) g(-1)) compared with More importantly, application of these nonenzymatic glucose sensors was successfully explored. Electrochemical based on exhibit a high selectivity and low detection limit (0.125 μm) toward oxidation glucose, which can mainly be attributed to morphological characteristics structure specific area rational...

10.1002/open.201402044 article EN cc-by-nc-nd ChemistryOpen 2014-11-11

In recent years, LCD end‐users are putting forward higher and requirements for dynamic picture display realism. With the increase of panel refresh rate, fidelity has a significant improvement. The extremely high rate become one most important indicators high‐end panels, especially video game usage scenarios. However, in is challenge to drive capability semiconductor TFTs (Thin Film Transistor), response time liquid crystal, transmission high‐frequency signals, resulting maximum...

10.1002/sdtp.16684 article EN SID Symposium Digest of Technical Papers 2023-06-01

Nonmonotonic composition dependence is often observed for numerous properties in the aqueous mixtures of small amphiphilic molecules. The molecular picture underlying this structure–activity relationship, however, remains largely elusive. We herein studied water reorientation dynamics mixture dimethyl sulfoxide (DMSO), which has a significant nonmonotonic dependence, using dynamic simulation and an extended jump model. analysis indicates that nonideal behavior driven by collective frame...

10.1021/acs.jpcb.0c00717 article EN The Journal of Physical Chemistry B 2020-02-05

This paper described the key technology of Dual‐Cell LCD with mega contrast. V‐type pixel sub cell, which contains metal lines, is designed for eliminating moiré, transmittance fluctuation and horizon mura. By contrast optical performance OLED, has same comprehensive as OLED; it even better than OLED in terms image quality details, showing a huge application prospect.

10.1002/sdtp.13819 article EN SID Symposium Digest of Technical Papers 2020-08-01

This paper study the impact of pixel voltage leakage and liquid crystal flexoelectric effect on flicker with simulation measurement method. The rule architecture, TFT voltage, electrode design, material, driving signal other factors is obtained, key under different conditions are identified. design scheme proposed, a strategy data modulation at blanking stage combined frequency‐wise ACC brightness compensation established to reduce flicker. Based proposed complete optimization strategy,...

10.1002/sdtp.16269 article EN SID Symposium Digest of Technical Papers 2023-04-01

A 3-dB multimode interference optical coupler based on rib waveguides with trapezoidal cross section was designed and fabricated silicon-on-insulator wafer. Potassium hydroxide (KOH) anisotropic chemical etching of silicon used to fabricate the obtain smooth interface. modified finite-difference beam propagation method simulate waveguide slope interfaces. The rms roughness interface is as small 1.49 nm. loss 1.3 dB/cm at wavelength 1.55 μm. has a good uniformity 0.2 dB.

10.1088/0256-307x/21/1/032 article EN Chinese Physics Letters 2004-01-01

A cascaded multimode interference 1×8 power splitter is proposed and fabricated in silicon-on-insulator material. The device consists of seven 1×2 splitters arranged a tree configuration. its element have the uniformity approximately 1.5 dB 0.3 dB, respectively.

10.1143/jjap.43.5085 article EN Japanese Journal of Applied Physics 2004-08-01

MMI (multimode interference) coupler, modulator and switch based on SOI (silicon-on-insulator) have been become more attractive in optical systems since they show important performances. SiO/sub 2/ thin cladding layers (<1.0 /spl mu/m) can be used waveguide due to the large index step between Si 2/, making them compatible with VLSI technology. The design fabrication of multimode interference (MMI) technology are presented paper. results demonstrated that has an extinction ratio -11.0 dB...

10.1109/cos.2003.1278216 article EN 2004-05-13

Silicon-on-insulator technology has been used to fabricate 2×2 thermo-optic switches. The switch shows crosstalk of -23.4 dB and extinction ratio 18.1 in the bar-state. switching speed is less than 30 μs power consumption about 420 mW. measured excess loss 1.8 dB. These merits make more attractive for applications wavelength division multiplexing.

10.1088/0256-307x/20/12/028 article EN Chinese Physics Letters 2003-12-01

This paper described the key technology of ADS TV with negative liquid crystal based on rubbing process. has been widely used in all size LCD because its outstanding features like high transmittance, wide view, and weak color shift With crystal, it can effectively improve caused by pre‐tilt angle LC contrast ratio. Negative optical alignment process well developed, but cannot be applied to generation such as G10.5 TFT‐LCD lines risk uniformity specific wavelengths light, limitation OA...

10.1002/sdtp.14305 article EN SID Symposium Digest of Technical Papers 2020-08-01

ADS display mode has many advantages, especially wide viewing angle, and been widely used in various LCD products. In this paper, based on the upgraded PRO technology, we adopt high CR negative liquid crystal, low reflection surface materials process, oblique angle light leakage compensation film, spectrum matching optimize of BLU RGB resin, combined with mini LED backlight. Based these methods, achieve native &gt;3000:1, extreme black state reflectivity &lt; 1.5%, ambient color contrast, no...

10.1002/sdtp.15948 article EN SID Symposium Digest of Technical Papers 2022-10-01

In this paper, a new type of full attachment double‐sided liquid crystal display is designed. The screen and optical films are bonded by OCA called full‐ LCD. mentioned in paper uses the same light source on both sides, guide plate made glass material or nano material. designed ultra‐thin border extremely narrow. It architecture, higher utilization sources, lower power consumption. Because it does not require backplane design, lighter. Its performance has been improved, its cost reduced.

10.1002/sdtp.17246 article EN SID Symposium Digest of Technical Papers 2024-04-01

The present paper reports the study of electrical characteristics and bias temperature stress (BT) stability crystalline Indium‐Gallium oxide (IGO) dual‐gate thin film transistor (TFT) with top‐gate structure. TFT normalized Ion over 100εA PBTS/NBTIS 0.35/‐2.85V was successfully fabricated. By adjusting oxygen partial pressure (O 2 %) substrate temperature, we can control wet etching rate (WER) as‐deposited IGO film. After post annealing, containing In O 3 phase preferred orientation (222)...

10.1002/sdtp.17802 article EN SID Symposium Digest of Technical Papers 2024-06-01

Abstract In this paper, a novel partial scan Gate Driver on Array (GOA) architecture with gate and cascade separated output (GCSS‐GOA) is proposed. Combined newly designed timing controller (TCON) IC IP, dynamic local refresh at any position different rate area liquid crystal display (LCD) panel are achieved. The driving schemes for the image quality evaluation results also presented. For power consumption, it can be reduced by up to 50% respectively GOA data drivers in mode under 60 Hz...

10.1002/jsid.1295 article EN Journal of the Society for Information Display 2024-05-01

In this paper, the electrical performance of a‐Si TFT product on adjustable frequency display is studied. It found that panel flicker behavior related to channel characteristics, which Cgs capacitance increase at low frequency. And it also relationship between brightness fluctuations and leakage current affected by Poole‐Frenkel effect. By optimizing process parameter reduce change in region, obviously improved. As a result, gaming can meet G‐sync optical standard requirement.

10.1002/sdtp.17252 article EN SID Symposium Digest of Technical Papers 2024-04-01

In this paper, we introduce the concept of high contrast ratio to gaming monitor display based on ADS Pro technology. The specification is increased from 1000:1 2000:1 improve picture quality while remaining native response time with 5ms. We have developed low viscosity negative liquid crystal and optimized panel design, backlight design process conditions maximize white brightness minimize dark brightness. Finally, 2225:1, in form grey‐to‐grey 5.27 ms, blue light less than 35% for healthier display.

10.1002/sdtp.17372 article EN SID Symposium Digest of Technical Papers 2024-04-01

A novel low reflectivity composite film using commonly used materials in TFT technology for borderless LCD display applications was investigated and prepared this paper, the design of structure also given. Experimental result shows that by depositing ITO/MoNb/ITO/Cu on glass with optimized thickness, at 550nm can be reduced to 4.39%. It is found total visible light performance long‐wavelength spectrum adjusted varying thickness ITO MoNb.

10.1002/sdtp.17245 article EN SID Symposium Digest of Technical Papers 2024-04-01

We demonstrated a 75‐inch 4K 60Hz outdoor display with an open cell brightness of 3500 nits and regular service life greater than 30000 hours. In terms design, we focused on improving transistor shading. the process, efforts were made to reduce Ioff enhance TFT working stability. And in circuit aspect, time‐varying voltage compensation IC was employed.

10.1002/sdtp.17244 article EN SID Symposium Digest of Technical Papers 2024-04-01

High mobility of thin film transistor (TFT) is critical to liquid crystal display (LCD) for high performance. We have developed an ultra‐high (&gt; 50 cm 2 /V•s) Top Gate Self‐alignment (TGSA) bilayer oxide TFT technology, achieving on‐state current over 60μA and excellent electrical stress stability, which makes it possible achieve resolution, refresh narrow‐bezel simultaneously. Dual gate driving TGSA exhibits even higher support a source line DEMUX 1:2 circuit design. A 12.7 inch 3K*2K...

10.1002/sdtp.17163 article EN SID Symposium Digest of Technical Papers 2024-04-01
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