• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1858-1859
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• 2007

최근 LCD-TV의 화질 개선을 위해서 다양한 영상처리 알고리즘이 적용되고 있다. 그 중 선명도 개선 알고리즘은 영상의 경계선을 강조하여 영상이 보다 선명하게 보이도록 한다. 하지만 경계선을 강조하는 과정에서 노이즈도 같이 증가하는 문제점이 있다. 본 논문에서는 강조된 경계선을 유지하면서 노이즈를 줄일 수 있는 알고리즘을 제안하고자 한다. 이를 위하여 Bilateral 필터를 기반으로 영상의 분산 값에 따라 영상의 노이즈 제거 정도를 결정하는 알고리즘을 제안한다.

• Journal of Digital Convergence
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• v.10 no.4
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• pp.37-43
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• 2012

LED TV integration test unit are the equipment for testing LED BLU as LED BLU's operation, error check, AGING work. The previous test unit were inconvenient because it must change test unit in production line according to LCD's kind and size. This paper develops by integration style test unit that can accommodate various LED TV BLU model of 32 ~ 52 inch that is not one LED TV BLU model. We make that output current is various to dimension of 80 ~ 215 mA. We make functions that are LED BLU state check, Diming and heat occurrence mitigation. Also we develop firmware program and that the program can be upgraded and that can support new panel.

• Journal of Korea Game Society
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• v.13 no.3
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• pp.31-46
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• 2013

TV has evolved into thin and wide shaped due to the huge sales of LCD. And it makes many houses own large TV easily. After that TV technology focuses on large and high-definition screen. Recently majority of TV market is that of smart TV which is equipped with internet and GPOS(General Purpose Operating System) so people can install several applications on TV. Yet smart TV's remote controllers are not suitable for several applications. Especially there is no way to provide people with sufficient interactivity with game contents of TV. In this paper, we proposed new methodology for interworking between smart TV and smart device to enhance interactivity of smart TV platform game.

• Journal of the Korean Society for Precision Engineering
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• v.22 no.3 s.168
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• pp.115-122
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• 2005

As the digital TV markets rapidly growing, many manufacturers introduce large size flat screen TV units. There are two different display types available to large size models which are plasma and TFT-LCD. Since both are constructed with thin large panels that are mostly fragile to even moderate mechanical shock inputs. Some large size panels are severely resonated by the acoustic sound generated TV which deteriorates video quality. Recognizing the potential problems of large displays, accurate measurement of the panels is to be an essential task for the reliable design. Measurement of mechanical properties of a thin large crystallized panel such as TFT-LCD display with traditional material testing equipments is challenging. Since TFT-LCDs are constructed with combination of brittle glass panels, polymer sheets, and liquid crystal, their properties are not only anisotropic but also usually non-linear. Accurate measurement of the properties often requires very expensive facilities. Especially when the size of the test sample is as large as 40-inch or wider, direct measurement cost is prohibitive. Even worse, machining of the large TFT-LCD to make a smaller size specimen that could be fit into a material tester is not possible because of liquid crystal leakage. A new method fer the measurement of elastic modulus of large TFT-LCD panel is presented in this article. The suggested method provides a simple, economic, and user-friendly way fer measuring the elastic modulus of large panels with considerable level of accuracy.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.14 no.10
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• pp.945-954
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• 2004

Recently, specifications of flat display module is going to be higher definition, brightness and more wide viewing angle. On the other hand, physical thickness of those modules is forced to be slimmer and lighter. The flat display modules such as plasma or TFT-LCD employ thin crystallized panels that are normally weak to high level transient mechanical energy inputs. As a result, anti-shock performance is one of the most important design specifications of TFT-LCD modules. TFT-LCD module manufacturers and their customers like PC or TV makers perform a series of strict impact/drop test for the modules. However most of the large display module designs are generated based on engineer's own trial-error experiences. Those designs may result in disqualification from the drop/impact test during final product evaluation. A rigorous study on the impact failure of the displays is of course necessitated in order to avoid the problems. In this article, a systematic design evaluation is presented with combinations of FEM modeling and testing to support the optimal shock proof display design procedure.

• Proceedings of the KIPE Conference
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• 2008.06a
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• pp.271-273
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• 2008

A novel white-LED (light emitting diode) backlight system for 46"LCD TVs which involves the average current controlled X-Y channel driving method is proposed, which is composed of 1 converter and row and column channel switches. In the conventional X-Y channel driving driven with a constant voltage source, the driving current of LED increases because the threshold voltage of LED decreases when LED temperature goes up. To maintain the luminance of backlight constant, the average current controlled X-Y channel driving will be employed. Finally the results are confirmed by experimental results.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.1597-1600
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• 2006

LCD business has grown up changing its strategy and main focus by the order of NBPC, MNT and TV for decades. The presence of PDP drives TV market more demanding. The performance of LCD is required to be improved to struggle against PDP. To strengthen the competitiveness in the market, IPS and VA have evolved in various structures such as H-IPS, AS-IPS, and S-PVA. The introduction of new structures which have multi domains requires the interpretation of disclination area. We developed a new simulation tool based on fast Q-tensor method. It enables us to predict the shape of disclinations and the resulting optical properties. We applied this simulation tool to the development of 26-inch wide monitor having H-IPS mode.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.969-971
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• 2002

In this paper, we study the performances of optical system design using the 1 panel LCD without color filter for projection color television. We analyze the optical efficiency compare this system with 1 panel LCD system using the color filter, and work out a constraint condition of 1 panel LCD without color filter for optical design. We design a high brightness 1 panel optical system using a complex reflection mirror and suggest a method of the optical system design.

• Proceedings of the KIPE Conference
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• 2005.07a
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• pp.746-749
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• 2005

LCD 디스플레이의 대형화에 따라 백라이트용 냉음극 방전램프(Cold Cathode Fluorescent Lamp)는 길어지고 있으며, 하나의 램프를 이용한 백라이트는 휘도의 한계가 있어 대형 디스플레이에서는 램프를 병렬로 사용하여 필요한 휘도를 만들고 있다. 본 논문에서는 냉음극 방전램프 16개를 사용하는 37인치 LCD TV용 대형 백라이트 구동을 위한 인버터를 각각의 램프들이 입력조건에 대해 동일한 출력을 갖도록 설계하였다. 기존의 냉음극 방전램프의 구동방식인 하이-로우(H-L) 방식에서의 문제점을 보완하여 하이-하이(H-H) 방식을 채택하므로서 램프간의 휘도편차를 개선하였고 향후에 상용화가 가능함을 보였다.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.1590-1592
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• 2009

The ubiquitous nature of large area TFT-LCD televisions are truly one of the major success stories of consumer electronic products for the $21^{st}$ century. It is the industry's ability to lower prices over the years that have made TFT-LCD television an affordable option for the majority of consumers. TFT-LCD equipment manufacturers have played a major role these cost reduction efforts. Increasing requirements for high process quality like for eg UHD panels need to be met simultaneously with the demand of an highly productive and reliable equipment. AKT provides an excellent PVD product by improving performance and cost of ownership (CoO) for Gen8.5 and beyond.