Design and Implement the Readout Circuit of an In-Cell High-Resolution Capacitive Touch Panel

2017 ◽  
Author(s):  
Tsung-Yen Ku ◽  
Paul C.-P. Chao ◽  
Chin-Hai Huang ◽  
En-Chih Liu ◽  
Ming-Hua Yeh ◽  
...  
Keyword(s):  
High Resolution ◽  
Cell Structure ◽  
Thin Film Transistor ◽  
Frame Rate ◽  
Readout Circuit ◽  
Charge Amplifier ◽  
Touch Panel ◽  
Capacitance Method ◽  
Capacitor Charge ◽  
Charge Change

This paper proposes a high resolution capacitive touch panel readout circuit to sense the Variation by self-capacitance method. This AM display of in-cell structure includes an active architecture for improved resolution, that controlling the TFT (Thin-film transistor) to make the accuracy better. In addition, the panel has 60 sensing point per 0.88 inches and the proposed readout circuit used switched capacitor charge amplifier (SCCA) to sensing the charge change and enhances the SNR (Signal-to-noise) by eliminating the baseline. The experimental results show that the proposed readout circuit SNR achieves 38dB and the frame rate is 200Hz.

scholarly journals NIMG-19. USING FUNCTIONAL ULTRASOUND (FUS) TO MAP BRAIN FUNCTIONALITY AND TUMOR VASCULATURE WITH MICROMETER-MILLISECOND PRECISION

2020 ◽  
Vol 22 (Supplement_2) ◽  
pp. ii151-ii151
Author(s):  
Sadaf Soloukey ◽  
Arnaud J P E Vincent ◽  
Djaina D Satoer ◽  
Frits Mastik ◽  
Marion Smits ◽  
...  
Keyword(s):  
Decision Making ◽  
High Resolution ◽  
Cerebral Blood Volume ◽  
Power Doppler ◽  
Awake Craniotomy ◽  
Frame Rate ◽  
Low Grade ◽  
Neurosurgical Procedures ◽  
Tumor Removal ◽  
Functional Areas

Abstract OBJECTIVE In the early 20th century, Dr. Cushing first demonstrated the use of electrical stimulation mapping (ESM) to define motor and sensory cortices during neurosurgical procedures. Essentially, little has changed in what guides a neurosurgeon’s intra-operative decision-making since. Inherent limitations of ESM such as limited depth penetration and risk of seizure elicitation, warrant the development of new image-guided resection tools. Here, we present functional Ultrasound (fUS)-imaging as a new, high-resolution tool to guide intra-operative decision-making during awake tumor removal. METHODS fUS relies on high-frame-rate ultrasound, which offers images at thousands of frames-per-second. As such, fUS is sensitive to very small motions caused by vascular dynamics (µDoppler), allowing measurements of changes in cerebral blood volume (CBV). This facilitates the possibility to 1) detect functional response, as CBV-changes reflect changes in metabolism of activated neurons through neurovascular coupling and 2) visualize high-resolution vascular morphology of tumor and healthy tissue. During conventional awake craniotomy surgery, n= 10 patients were asked to perform 60s functional tasks to elicit cortical responses. Simultaneously, a conventional 5 MHz ultrasound probe connected to an experimental acquisition system, was placed over ESM-defined functional areas. After image acquisition, correlation analyses with the corresponding tasks revealed functional and non-functional areas. In addition, 3D vascular maps were reconstructed from subsequent 2D-Power Doppler Images (PDIs). RESULTS fUS was able to detect functional areas as activated using conventional motor tasks, as well as complex language-related tasks. In addition, both 2D-PDIs and 3D-reconstructions revealed the ability of fUS to detect unique high-resolution onco-vascular characteristics in high- and low-grade malignancies. In all cases, images were acquired with micrometer-millisecond (300 µm, 1.5-2.0 msec) precision at imaging depths > 5 cm. CONCLUSIONS Applying fUS-imaging successfully in this awake craniotomy series serves as a clear demonstration of the technique’s revolutionary potential for maximizing safe tumor removal.

ITVT-10. Using functional Ultrasound (fUS) for real-time, depth-resolved functional and vascular delineation of brain tumors with micrometer-millisecond precision

2021 ◽  
Vol 23 (Supplement_6) ◽  
pp. vi230-vi230
Author(s):  
Sadaf Soloukey ◽  
Luuk Verhoef ◽  
Frits Mastik ◽  
Bastian Generowicz ◽  
Eelke Bos ◽  
...  
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Cerebral Blood Volume ◽  
Imaging Technique ◽  
Power Doppler ◽  
Ease Of Use ◽  
Frame Rate ◽  
Neurosurgical Procedures ◽  
Vascular Morphology

Abstract BACKGROUND Neurosurgical practice still relies heavily on pre-operatively acquired images to guide tumor resections, a practice which comes with inherent pitfalls such as registration inaccuracy due to brain shift, and lack of real-time functional or morphological feedback. Here we describe functional Ultrasound (fUS) as a new high-resolution, depth-resolved, MRI/CT-registered imaging technique able to detect functional regions and vascular morphology during awake and anesthesized tumor resections. MATERIALS AND METHODS fUS relies on high-frame-rate (HFR) ultrasound, making the technique sensitive to very small motions caused by vascular dynamics (µDoppler) and allowing measurements of changes in cerebral blood volume (CBV) with micrometer-millisecond precision. This opens up the possibility to 1) detect functional response, as CBV-changes reflect changes in metabolism of activated neurons through neurovascular coupling, and 2) visualize in-vivo vascular morphology of pathological and healthy tissue with high resolution at unprecedented depths. During a range of anesthetized and awake neurosurgical procedures we acquired vascular and functional images of brain and spinal cord using conventional ultrasound probes connected to a research acquisition system. Building on Brainlab’s Intra-Operative Navigation modules, we co-registered our intra-operative Power Doppler Images (PDIs) to patient-registered MRI/CT-data in real-time. RESULTS During meningioma and glioma resections, our co-registered PDIs revealed fUS’ ability to visualize the tumor’s feeding vessels and vascular borders in real-time, with a level of detail unprecedented by conventional MRI-sequences. During awake resections, fUS was able to detect distinct, ESM-confirmed functional areas as activated during conventional motor and language tasks. In all cases, images were acquired with micrometer-millisecond (300 µm, 1.5–2.0 ms) precision at imaging depths exceeding 5 cm. CONCLUSION fUS is a new real-time, high-resolution and depth-resolved imaging technique, combining favorable imaging specifications with characteristics such as mobility and ease of use which are uniquely beneficial for a potential image-guided neurosurgical tool.

scholarly journals Phaseless Terahertz Coded-Aperture Imaging Based on Incoherent Detection

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 226 ◽  
Author(s):  
Long Peng ◽  
Chenggao Luo ◽  
Bin Deng ◽  
Hongqiang Wang ◽  
Yuliang Qin ◽  
...  
Keyword(s):  
High Resolution ◽  
High Speed ◽  
Phase Retrieval ◽  
Time Frame ◽  
Frame Rate ◽  
Future Research ◽  
Coded Aperture ◽  
Main Work ◽  
Coded Aperture Imaging ◽  
The Matrix

In this paper, we propose a phaseless terahertz coded-aperture imaging (PTCAI) method by using a single incoherent detector or an incoherent detection array. We at first analyze and model the system architecture, derive the matrix imaging equation, and then study the phase retrieval techniques to reconstruct the original target with high resolution. Numerical experiments are performed and the results show that the proposed method can significantly reduce the system complexity in the receiving process while maintaining high resolution imaging capability. Furthermore, the approach of using incoherent detection array instead of single detector is capable of decreasing the encoding and sampling times, and therefore helps to improve the imaging frame rate. In our future research, the method proposed in this paper will be experimentally tested and validated, and high-speed PTCAI at nearly real-time frame rates will be the main work.

A 100 MHz B-Scan Ultrasound Backscatter Microscope

1989 ◽  
Vol 11 (2) ◽  
pp. 95-105 ◽  
Author(s):  
M.D. Sherar ◽  
B.G. Starkoski ◽  
W.B. Taylor ◽  
F.S. Foster
Keyword(s):  
High Resolution ◽  
Internal Structure ◽  
Frame Rate ◽  
Ocular Tissue ◽  
Multicellular Spheroids ◽  
Microscopic Scale ◽  
Motion System ◽  
Ultrasound Backscatter ◽  
Mode Technique

The construction and operation of a 100 MHz B-mode ultrasound backscatter microscope are described. The powerful B-mode technique is extended into the domain of microscopy allowing the imaging of internal structure in living specimens on a microscopic scale. A frame rate of 5 frames per second is achieved which gives rapid feedback to the operator. Specially designed components of the scanner are described in detail, including the transducer, motion system and scan converter. An f/2 transducer is employed, leading to a scanner resolution of approximately 36 μm in both the lateral and axial directions. The benefits of such high resolution are demonstrated in preliminary images of multicellular spheroids and intact human ocular tissue.

Bottom-Gate Gallium Indium Zinc Oxide Thin-Film Transistor Array for High-Resolution AMOLED Display

2008 ◽  
Vol 29 (12) ◽  
pp. 1309-1311 ◽  
Author(s):  
Jang Yeon Kwon ◽  
Kyoung Seok Son ◽  
Ji Sim Jung ◽  
Tae Sang Kim ◽  
Myung Kwan Ryu ◽  
...  
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
High Resolution ◽  
Thin Film Transistor ◽  
Oxide Thin Film ◽  
Zinc Oxide Thin Film ◽  
Indium Zinc Oxide ◽  
Bottom Gate

A 128×96 Pixel Stack-Type Color Image Sensor: Stack of Individual Blue-, Green-, and Red-Sensitive Organic Photoconductive Films Integrated with a ZnO Thin Film Transistor Readout Circuit

2011 ◽  
Vol 50 (2R) ◽  
pp. 024103 ◽  
Author(s):  
Hokuto Seo ◽  
Satoshi Aihara ◽  
Toshihisa Watabe ◽  
Hiroshi Ohtake ◽  
Toshikatsu Sakai ◽  
...  
Keyword(s):  
Thin Film ◽  
Color Image ◽  
Thin Film Transistor ◽  
Image Sensor ◽  
Zno Thin Film ◽  
Readout Circuit

Modular 64×64 CdZnTe Arrays With Multiplexer Readout for High-Resolution Nuclear Medicine Imaging

1997 ◽  
Vol 487 ◽  
Author(s):  
J. M. Woolfenden ◽  
H. B. Barber ◽  
H. H. Barrett ◽  
E. L. Dereniak ◽  
J. D. Eskin ◽  
...  
Keyword(s):  
Nuclear Medicine ◽  
High Resolution ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Imaging System ◽  
Radiation Detectors ◽  
Readout Circuit ◽  
Nuclear Medicine Imaging ◽  
Pixel Pitch

AbstractWe are developing modular arrays of CdZnTe radiation detectors for high-resolution nuclear medicine imaging. Each detector is delineated into a 64×64 array of pixels; the pixel pitch is 380 jim. Each pixel is connected to a corresponding pad on a multiplexer readout circuit. The imaging system is controlled by a personal computer. We obtained images of standard nuclear medicine phantoms in which the spatial resolution of approximately 1.5 mm was limited by the collimator that was used. Significant improvements in spatial resolution should be possible with different collimator designs. These results are promising for high-resolution nuclear medicine imaging.

Highly Reliable Bidirectional a-InGaZnO Thin-Film Transistor Gate Driver Circuit for High-Resolution Displays

2016 ◽  
Vol 63 (6) ◽  
pp. 2405-2411 ◽  
Author(s):  
Chih-Lung Lin ◽  
Chia-En Wu ◽  
Fu-Hsing Chen ◽  
Po-Cheng Lai ◽  
Mao-Hsun Cheng
Keyword(s):  
Thin Film ◽  
High Resolution ◽  
Thin Film Transistor ◽  
Driver Circuit ◽  
Gate Driver
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