• Title/Summary/Keyword: integrated driver

Search Result 238, Processing Time 0.03 seconds

The Implementation of uClinux Device Driver of Nios II Embedded Processor System for Multimedia Application (멀티미디어 응용을 위한 Nios II 임베디드 프로세서 시스템의 uClinux 디바이스 드라이버 구현)

  • Kim, Dong-Jin;Park, Young-Seak
    • Journal of the Institute of Convergence Signal Processing
    • /
    • v.10 no.4
    • /
    • pp.245-255
    • /
    • 2009
  • Recently, embedded processor systems have been widely used in the field of information communication devices and increased its use range and influence. The embedded systems are offered variety of functions, and its operating systems have been developed to make them easy to repair and maintain. Especially embedded linux is very cheap and provide a lot of equipment drivers. Also we can set up our own system because the source code is opened. In this paper, we describe the implementation of Touch panel and TFT-LCD device driver that are widely used for multimedia application. We designed the system hardware by using Altera Nios II embedded system. And we implemented the device drivers of frame buffer, touch panel and i2s based on uClinux for multimedia application, and tested actual operations of the integrated system.

  • PDF

A Study of Driver's Response to Variable Message Sign Using Evolutionary Game Theory (진화 게임을 이용한 VMS 정보에 따른 운전자의 행태 연구)

  • Kim, Joo Young;Na, Sung Yong;Lee, Seungjae;Kim, Youngho
    • Journal of Korean Society of Transportation
    • /
    • v.32 no.5
    • /
    • pp.554-566
    • /
    • 2014
  • An objective of VMS(Variable Message Signs) is to make transportation system effective specifically for driver's path selection. The traffic solutions including a VMS problem can be modeled through Game Theory, however, the majority of the studies can not model various driver's response according to VMS information in game theory. So, this paper tries to analyze a driver's response according to VMS traffic informations through evolutionary game theory. We apply a behavior characteristics of driver to evolutionary game theory, then finds drivers are only accepting in case of the biggest pay-off, and if a traffic flow finds a balance over time, ratio of accepting information is converged as an evolutionary stable state gradually. Consequently, the strategy of the other drivers such as traffic problems can not be predicted accurately. In case, drivers repeat between groups and reasonable judgment by the experience, we expect that VMS can provide strategic information through evolutionary game theory.

A Design of LLC Resonant Controller IC in 0.35 um 2P3M BCD Process (0.35 um 2P3M BCD 공정을 이용한 LLC 공진 제어 IC 설계)

  • Cho, Hoo-Hyun;Hong, Seong-Wha;Han, Dae-Hoon;Cheon, Jeong-In;Hur, Jeong;Lee, Kang-Yoon
    • Journal of the Institute of Electronics Engineers of Korea SD
    • /
    • v.47 no.5
    • /
    • pp.71-79
    • /
    • 2010
  • This paper presents a design of a LLC resonant controller IC. LLC resonant controller IC controls the voltage of the 2nd side by adjusting frequency the input frequency of the external resonant circuit. The clock generator is integrated to provide the pulse to the resonant circuit and its frequency is controlled by the external resistor. Also, the frequency of the VCO is adjusted by the feedback voltage. The protection circuits such as UVLO(Under Voltage Lock Out), brown out, fault detector are implemented for the reliable and stable operation. The HVG, and LVG drivers can provide the high current and voltage to the IGBT. The designed LLC resonant controller IC is fabricated with the 0.35 um 2P3M BCD process. The overall die size is $1400um{\times}1450um$, and supply voltage is 5V, 15V.

Brand Equity and Purchase Intention: The Fashion Market in China (상표자산이 구매의도에 미치는 영향: 중국패션시장에서)

  • Lee, Dong-Hae;Choi, Young-Ro
    • Journal of Distribution Science
    • /
    • v.13 no.7
    • /
    • pp.85-90
    • /
    • 2015
  • Purpose - Global trends play a part to change the structure of the fashion industry. In particular, companies attempting to conduct innovative marketing centering on such products as SPA brands are growing into global companies. SPA stands for "Specialty Store Retailer of Private Label Apparel", meaning its activities are fully integrated from manufacturing through sales, including material procurement design, product, distribution, inventory management, and final sales. For this reason, more understanding of individual corporate profitability is very sensitive to consumer's attitudinal changes. The effects that corporate marketing activities on customer lifetime value through brand attitude were analyzed based on a structural equation model. Rust suggested value equity, brand equity, and relationship equity as customer equity driver. The study examines Chinese consumer because China is the fastest growing fashion market in the world. Research design, data, and methodology - The survey targeted Chinese college student age 20s. Only respondents who had purchased SPA brands in the past year were included for this research. A total of 303, except for 47 missing data of 350 distributed questionnaires were included in this research. The questionnaire is consists of six part to measure value, brand, relationship equity, attitude toward brand, purchase intention and demographic characteristics. This research conducted exploratory factor analysis and reliability test. To verify research hypotheses, structural equation model test was conducted. As for customer equity, diversified models in consideration of the scope of acquisition data, a method of collection of data, influencing factor, and predictability were suggested based on a net present value model. However, the history of customer equity study is relatively short, and sufficient empirical analyses have not been conducted, so more integrated analysis is required. In this study, the concept of driver suggested by Rust was applied to figure out the effects that consumer's attitude has on customer equity. The customer equity driver suggested by them consists of brand equity, value equity, and relationship equity. Results - This study reveals that value equity and brand equity have a positive influence on relationship equity. And, relationship equity has a positive influence on purchase intention through brand attitude. However, value equity and brand equity do not influence on brand attitude. Conclusion - The results of this research generated following implications. First, SPA brands need to take advantage of their value equity such as perceived low price and up-to-date fashion style to attract Chinese young consumer. Second, strong brand equity promises dominants position in the competitive market. As Chinese fashion market grows rapidly, SPA brands can consider branding strategy such as flagship store and celebrity marketing enhancing brand image. Third, the core concept of customer equity strategy is to maintain a relationship with their expecting and existing customers. The relationship equity is built by brand equity and value equity. When SPA brands serves product and service meet with individual customers, customers have intimacy to the brands.

Handover Control for WCDMA Femtocell Networks

  • Chowdhury, Mostafa Zaman;Jang, Yeong-Min
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.35 no.5B
    • /
    • pp.741-752
    • /
    • 2010
  • The ability to seamlessly switch between the macro networks and femtocell networks is a key driver for femtocell network deployment. The handover procedures for the integrated femtocell/macrocell networks differ from the existing handovers. Some modifications of existing network and protocol architecture for the integration of femtocell networks with the existing macrocell networks are also essential. These modifications change the signal flow for handover procedures due to different 2-tier cell (macrocell and femtocell) environment. The handover between two networks should be performed with minimum signaling. A frequent and unnecessary handover is another problem for hierarchical femtocell/macrocell network environment that must be minimized. This work studies the details mobility management schemes for small and medium scale femtocell network deployment. To do that, firstly we present two different network architectures for small scale and medium scale WCDMA femtocell deployment. The details handover call flow for these two network architectures and CAC scheme to minimize the unnecessary handovers are proposed for the integrated femtocell/macrocell networks. The numerical analysis for the proposed M/M/N/N queuing scheme and the simulation results of the proposed CAC scheme demonstrate the handover call control performances for femtocell environment.

Design of Integrated Control Software for Automated Observing System

  • Ji, Tae-Geun;Lee, Hye-In;Pak, Soojong;Im, Myungshin;Lee, Sang-Yun;Gibson, Coyne A.;Kuehne, John;Marshall, Jennifer
    • The Bulletin of The Korean Astronomical Society
    • /
    • v.42 no.1
    • /
    • pp.57.2-57.2
    • /
    • 2017
  • Remote and robotic telescopes are the most effective instrument for astronomical survey projects. The system is based on the dynamic operation of all astronomical instruments such as dome and telescope control system (TCS), focuser, filter wheel and data taking camera. We adopt the ASCOM driver platform to control the instruments through the integrated software. It can convert different interface libraries from various manufacturers into a uniform standard library. This allows us to effectively control astronomical instruments without modifying codes. We suggest a conceptual design of software for automation of a small telescope such as the new wide-field 0.25m telescope at McDonald Observatory. It can also be applied to operation of multi-telescopes in future projects.

  • PDF

VEHICLE LONGITUDINAL AND LATERAL STABILITY ENHANCEMENT USING A TCS AND YAW MOTION CONTROLLER

  • Song, J.H.;Kim, H.S.;Kim, B.S.
    • International Journal of Automotive Technology
    • /
    • v.8 no.1
    • /
    • pp.49-57
    • /
    • 2007
  • This paper proposes a traction control system (TCS) that uses a sliding mode wheel slip controller and a PID throttle valve controller. In addition, a yaw motion controller (YMC) is also developed to improve lateral stability using a PID rear wheel steering angle controller. The dynamics of a vehicle and characteristics of the controllers are validated using a proposed full-car model. A driver model is also designed to steer the vehicle during maneuvers on a split ${\mu}$ road and double lane change maneuver. The simulation results show that the proposed full-car model is sufficient to predict vehicle responses accurately. The developed TCS provides improved acceleration performances on uniform slippery roads and split ${\mu}$ roads. When the vehicle is cornering and accelerating with the brake or engine TCS, understeer occurs. An integrated TCS eliminates these problems. The YMC with the integrated TCS improved the lateral stability and controllability of the vehicle.

Comparative Analysis of Requirements for Information Presentation on In-vehicle Display Systems by Driving Career (운전 경력에 따른 차량 내 디스플레이 정보표시 요구사항 비교)

  • Gu, Bo Ram;Ju, Da Young
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.24 no.6
    • /
    • pp.668-676
    • /
    • 2016
  • The accelerated convergence of automobiles and ICT has led to an increase in in-vehicle electronic devices designed to enhance the safety and convenience of drivers. Consequently, the information presentation on in-vehicle display systems for drivers and passengers need to be taken into account in order to guarantee driving stability while satisfying the needs of UX-based design users. This study compared and evaluated requirements for information items shown on in-vehicle displays regarding driving safety and convenience by groups according to driving career. A total of 38 information items related to safety and convenience that can be displayed while driving and pulling over were collected. Their level of necessity was tested and evaluated by 234 drivers. Using the results, we conducted a comparative analysis on the requirements for information presentation on in-vehicle display systems by groups according to driving career.

A Design of Method for Compensating Paths based on Integrated Vehicle Networks (통합 차량 네트워크 기반 경로 보정 기법 설계)

  • Moon, Hyeyoung;Kim, Jindeog
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2009.10a
    • /
    • pp.241-244
    • /
    • 2009
  • Recently car navigation systems which are widely spreaded and provide routes exactly have been evolved. The systems use various information and techniques as follows. In order to provide shortest path with good flow, realtime traffic information provided by DMB is used. Augmented reality technique is also introduced to give the sense of real to driver by displaying real images captured by camera during driving. But these operate well when the GPS receives data normally. Exact information about the position of vehicles becomes a base that supports the above function with realities. This paper proposes a method for compensating a given path. It uses various information by integrated vehicle networks when the GPS does not operates normally.

  • PDF

Intelligent Driver Assistance Systems based on All-Around Sensing (전방향 환경인식에 기반한 지능형 운전자 보조 시스템)

  • Kim Sam-Yong;Kang Geong-Kwan;Ryu Young-Woo;Oh Se-Young;Kim Kwang-Soo;Park Sang-Cheol;Kim Jin-Won
    • Journal of the Institute of Electronics Engineers of Korea TC
    • /
    • v.43 no.9 s.351
    • /
    • pp.49-59
    • /
    • 2006
  • DAS(Driver Assistance Systems) support the driver's decision making to increase safety and comfort by issuing the naming signals or even exert the active control in case of dangerous conditions. Most previous research and products intend to offer only a single warning service like the lane departure warning, collision warning, lane change assistance, etc. Although these functions elevate the driving safety and convenience to a certain degree, New type of DAS will be developed to integrate all the important functions with an efficient HMI (Human-Machine Interface) framework for various driving conditions. We propose an all-around sensing based on the integrated DAS that can also remove the blind spots using 2 cameras and 8 sonars, recognize the driving environment by lane and vehicle detection, construct a novel birds-eye HMI for easy comprehension. it can give proper warning in case of imminent danger.