A5027826075- VLSI and Analog Circuit Testing
- Optical Wireless Communication Technologies
- Radiation Effects in Electronics
- Semiconductor Lasers and Optical Devices
- Low-power high-performance VLSI design
- Advanced Sensor and Energy Harvesting Materials
- Advanced Wireless Communication Techniques
- Radio Wave Propagation Studies
- Interactive and Immersive Displays
- Electromagnetic Compatibility and Noise Suppression
- Advanced Optical Imaging Technologies
- Analog and Mixed-Signal Circuit Design
- Advanced Photonic Communication Systems
- VLSI and FPGA Design Techniques
- 3D IC and TSV technologies
- graph theory and CDMA systems
- Cryptographic Implementations and Security
- Nonlinear Optical Materials Studies
- Neural Networks and Applications
- Aerodynamics and Acoustics in Jet Flows
- Porphyrin and Phthalocyanine Chemistry
- Physical Unclonable Functions (PUFs) and Hardware Security
- Bluetooth and Wireless Communication Technologies
- Cooperative Communication and Network Coding
- Sensor Technology and Measurement Systems
Sungkyunkwan University
2014-2023
Pratt & Whitney (United States)
2017
Whitney Museum of American Art
2017
Duke University
2014
Samsung (South Korea)
2010-2012
Yonsei University
2008-2009
Kyoto University
2009
Kyoto University Institute for Chemical Research
2009
Electronics and Telecommunications Research Institute
2006
A novel strategy for constructing a vertical arrangement of bicontinuous donor-acceptor arrays on semiconducting electrode has been developed. The relationship between the film structure and photoelectrochemical properties elucidated as function number donor layers first time. maximum incident photon-to-current efficiency value (21%) is comparable to highest (20%) reported arrangements electrodes.
We present a display-driver IC embedding capacitive-touch-screen controller. It is designed to operate with conventional overlay-type and on-cell touch display panels. The exhibits performance of 40 ms latency 120 Hz update rate within ±0.5 mm jitter. has been evaluated on 16.7 M-color wQVGA AMOLED panel screen.
Capacitive touch screens have become widely adopted in mobile applications. touch-screen display modules conventionally been assembled by bonding two separate modules: 1) a module with panel glass or film attached to the cover window, and 2) module, small air gap between them. An important role of is decrease capacitive coupling noise sensors, it very effective since permittivity more than 4χ lower that glass.
A positioning system based on visible light communication (VLC) utilizes illuminating indoor lights to identify the location of objects. The complexity and cost VLC are largely affected by limited bandwidths optical emitters detectors. In this paper, we present an signaling multiplexing technique, which employs Hadamard matrices implement a multiple-input multiple-output (MIMO) system. Fundamental conditions create nonnegative signals brightness control defined in conjunction with different...
Flexible and thin displays for smart devices have a large coupling capacitance between the sensor electrode of touch screen panel (TSP) display electrode. This increased limits signal passband to less than 100 kHz, resulting in significant reduction received signal, with driving frequency several hundred kilohertz used noise avoidance. To overcome this problem, we reduced effective at analog front-end by connecting circuit negative parallel TSP. In addition, in-phase quadrature demodulation...
In recent years, several indoor positioning systems have been extensively studied for environments where a satellite signal is typically degraded and interrupted. Among them, visible light (VLP), which has advantages such as the absence of electromagnetic interference, energy efficiency, high bandwidth availability, received considerable attention. However, most VLP are established based on two-dimensional (2D) methods in height receiver fixed or restricted tilt not considered. To solve...
The direct time-of-flight (d-ToF) technique is the most promising method for light detection and ranging (LiDAR) systems in long-range autonomous applications. However, receiver cannot distinguish its own pulse signal from those of other LiDAR systems. This causes mutual interference between systems, which degrades object recognition. optical code division multiple access (OCDMA) modulation can be used to avoid interference. it difficult secure sufficient orthogonal codes, because each laser...
Here we present for the first time, design, fabrication and characterization of novel high temperature SOI micro-hotplates employing tungsten resistive heaters. Tungsten has a operating temperature, good mechanical strength, could be used CMOS interconnects. These devices have been fabricated using commercial SOI-CMOS process followed by DR1E back-etch step, offering low cost option circuit integration. report on with two different diameters (560mum 300mum), 3D electro-thermal simulation in...
This paper generalizes the capacitive touch sensing problem in a form of weighing matrices which cover Walsh-Hadamard, 4k-order Hadamard, and other types matrices. The existing regular Hadamard matrix, conference that have small sum column weights, increase signal sensitivity as well signal-to-noise ratio for signals. Experiments show proposed design approach various can meet different requirements. results this research sophisticated matrix improves three times higher than time-multiplexed method.
A single event transient generated from a high-energy particle is capable of corrupting the status digital system. Not only in aerospace engineering, but even terrestrial application system reliability expected to worsen due radiation effects as semi-conductor technology advances. In this paper, we introduce an incremental gate-sizing method for minimizing soft errors gate-level designs. The target designs have constraints marginal circuit area and path delay. proposed heuristic algorithm...
The signal-to-noise ratio (SNR) and driving levels of capacitive touch sensors determine the applicability these to thinner displays sensor-integrated modules. simultaneous technique has been widely applied cope with various types environmental noise. A Hadamard matrix used code multiplex signals required increase SNR responsivity sensors. Using multi-level matrices, a new for sensing concurrent elements across multiple rows panel was developed. provides more effective design choices than...
As the semi-conductor technology advances, evaluation of soft error hardness for modern electrical and electronic devices becomes more generalized. Related studies have mainly focused on rate analysis both combinational sequential logic circuits, which includes techniques dynamic simulation, path-based statistical estimation. In particular, non-dynamic approaches make entire framework simple compact. However, when design under test has a large number propagation paths, there is still problem...
Measurements of two-photon absorption (TPA) cross sections are greatly confounded by even very weak linear absorption, for example from hot bands. In this case, the experimental power dependence fluorescence amplified and mode-locked laser systems can differ drastically, if peak intensity is adjusted to be same in both cases. A simple pulse train shaping method suppresses contributions extracts nonlinear section, demonstrated here a meso-to-meso ethyne-bridged bis[(porphinato)zinc(II)]...
In recent times, several indoor positioning systems have been actively studied for environments where satellite signals are typically degraded and disrupted. Among them, visible light (VLP) has attracted wide interest owing to its advantages of high energy efficiency, broad bandwidth availability, electromagnetic interference rejection. The performance a VLP system highly depends on ability distinguish between individual each channel. this paper, we propose new optical signal modulation...
Interconnection technologies must consider reliability problems in dense on-chip networks, where a large number of routing elements constitute the global tracks for bus transactions through high-speed and low-swing signals. As density device integration continues to evolve even employ multilevel states, effectively cope with dynamic errors maintain system reliability. The primary objective this study is develop an atomic hardware multiplexer decrease signal that can be applied fault-tolerant...
The continuous scaling of feature dimensions and the much more complex IC composition are pushing interconnect reliability to its limit, resulting in many fault tolerant schemes being proposed. At system level, real-scenario platform simulation is conducted choose optimal combination each part, various also compared. In a simulation, practical error model addition white noise needed. So, this paper suggests integrative simple probability using regression analysis with respect physical...
As the display panels with embedded touch sensors get thinner for slim and compact devices, impact of noise flowing into screen has become problematic. Although been regarded as a common-mode sensors, it can show noticeable spatial variation in case extremely thin modules like flexible modules. To deal non-uniform property noise, we examined resistance distribution cathode electrode that is passing through, proposed cross-type lattice mesh circuit model to correctly reflect around...
A sensing signal for an active sensor generally embeds a modulating product to ensure various noise immunity. The acquisition and the capacity of arrays can be further improved through multiplexing techniques using orthogonal sequences. However, multi-channel multi-user interferences degrade performance by introducing variety channel delays. In this paper, we construct delay-tolerant perfectly codes their decoding methods multi-level Hadamard matrices. stimulating sensors are re-constructed...
From multi-photon imaging penetrating millimeters deep through scattering biological tissue, to super-resolution conquering the diffraction limit, optical techniques have greatly advanced in recent years. Notwithstanding, a key unmet challenge all these is perform rapid wide-field turbid medium. Strategies such as active wave-front correction and excitation, both used for tissue imaging; or total-internal-refection illumination, can generate arbitrary excitation patterns over large...
As the technological advances in mobile display is focusing on thinner and wider structures, capacitive touch recognition suffers from ever-increasing noise. Realizing reliable thin displays requires a way to remove We observed that noise evident various patterns amplitudes according image. In order noise, we applied non-inverse signals inverse across two data frames, accordance with periodicity of With all other conditions remaining same, proposed method showed higher signal-to-noise ratio...
In recent years, simultaneous driving and sensing techniques for capacitive sensors have used to obtain high signal-to-noise ratio given time limit of the touch system. this paper, we show more effective utilization design constraints system by use variants 4k-order orthogonal codes. It is also possible ease specification input stages receivers in controllers.