• The Korean Journal of Financial Management
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• v.25 no.2
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• pp.103-135
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• 2008

We test the hypothesis whether foreign direct investments(hereafter "FDI") can affect the changes of the firm value. In this study, we use a newly developed event study technique, referred to as value-based event study approach(hereafter "VESA"), which is based on the seminal papers of M&M(1958, 1961, 1963) and Lee(2006, 2007). The empirical findings about the effects of FDI's on the intrinsic firm values, which can be measured by intrinsic Q(hereafter "IQ") values of the VESA, are as follows; First, the FDI's are carried out by healthy firms in terms of high IQ's. The IQ values become higher during the post-FDI period than prior to performing FDI's. Second, among the four components of IQ values, the value of assets-in-place, the value of intangible assets, and the value of growth opportunities are all increased during the post-FDI period, except the value of current earnings. Third, the same results are observed in all the samples classified by industry. In sum, thanks to the above findings in this study, we can conclude that the announcements of the FDI's are good and reliable indicators for the firm to signal to the market that the FDI firms are healthy in intrinsic firm values, and also that they have good chances to increase their firm values through the new investments abroad.

• The Science & Technology
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• v.27 no.1 s.296
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• pp.80-81
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• 1994

• Journal of Korean Electronics
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• v.14 no.10
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• pp.89-99
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• 1994

• Proceedings of the KIEE Conference
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• 2005.05a
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• pp.212-214
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• 2005

The MDDI(Mobile Digital Display Interface) standard is an optimized high-speed serial interconnection technology developed by Qualcomm and supports the VESA(Video Electronics Standard Association). It increases reliability and reduces power consumption in clamshell phones by decreasing the number of wires to interconnect with the LCD display. In this paper, the MDDI host is designed using VHDL and implemented on FPGA. We demonstrates that the MDDI host is connected with S3CA460 LCD controller is designed by Samsung Electronics Co. and display a steal image to the LCD.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10c
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• pp.659-661
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• 1998

기존의 평판 디스플레이 비디오 신호 전송 방식은 그래픽 어댑터에 저장된 비디오 데이터를 DA컨버터를 통해 아날로그 신호를 전송한 다음 평판 디스플레이 패널에서 다시 AD 컨버터를 이용해 디지털 신호로 복원한 다음 평판 디스플레이용 컨트롤에 입력되었다. 아날로그 신호를 보내는 것은 AD/DA 컨버터를 이중으로 사용할 뿐 아니라, 연결선을 길게 하는 것이 어렵고 노이즈로 인해 데이터의 수치가 변할 우려가 있다. 패널의 고면적화와 고해상도의 기술 발달로 SXGA급 및 UXGA급 신호에서는 높은 클럭 주파수와 긴 연결선에서도 안정된 신호 전송을 할 수 있는 VESA FPDi 규격에 맞는 인터페이스는 노이즈에 강하고 전자파 발생 억제 및 저전력으로 동작을 한다. 본 논문에서는 인터페이스 신호 전송 방법을 연구하여 신호의 변화를 줄여서 전자파 발생 억제 및 저전력에 도움을 주는 비디오 신호 엔코딩 알고리즘을 제안하였다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.511-512
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• 2007

The monitoring system has won acceptance as a premium mark that identifies the highest standard of product quality in advanced industry. The TOP features with multi-I/O ports and VGA & RCA TV-out ports supporting mirroring & multiple dual-display modes by windows 0/5. With the choice of versatile stands, panel mount, or VESA wall-mount swing arm and connecting to modem. Wireless keyboard, Customer Display and Card Reader, is your idea Panel system for the application of TOP(Touch Operation Pannel), KIOSK, or Office / Factory Automation. TOP is the hardware and software product that transacts all kind of functions for advanced technology equipment to button, switch, voice and graph etc so that let consumer use easily Industrial HMI System Touch Panel. System characteristics: Easy of use and flexibility to the user, Present a high value solution and advanced function for many Application, Factory Automation, Office Automation, Building Automation System, Information Service System, etc. Analog Touch - 2MB Flash Memory for Saving Screen Data - RS-232C/422 Serial Port - Multi Language Support.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.45 no.1
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• pp.29-37
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• 2008

With the rapid development of display technology as well as the diversity of display, image quality assessment plays an important role in display color reproduction. The image quality has described by objective evaluation based on the physical measured data, such as contrast ratio, color reproduction range, color temperature, and gamma characteristics, etc., however, the final judgement is achieved by perceptual quality assessment of observers. Therefore, it is necessary to investigate the relationship between physical performance of display and perceptual image quality. Thus, in order to evaluate objectively the color reproduction characteristics of two mobile displays, TFT-LCD and AMOLED, we measured the darkroom contrast ratio of full screen, luminance and color temperature of full-screen white, full-screen gray and color linearity, tone reproduction of color scales for each RGB primary, and color reproduction range. Then the pair-wise comparison is implemented for image experts and naive observers not only to judge their preference on principal evaluation attributes but also to subjectively describe perceived image quality. Through two evaluation processes, we derived the objective bases that can prove the results of subjective image quality assessment by interconnecting physical factors that have influence on observers' preference judgements. Finally, this paper provided important information for improving the image quality and increasing preference from an observer's point of view.