• JSTS:Journal of Semiconductor Technology and Science
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• 제15권1호
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• pp.145-149
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• 2015

A reconfigurable lighting engine for widely used lighting models is proposed for low-power GPU shaders. Conventionally, lighting operations that involve many complex arithmetic operations were calculated by the shader programs on the GPU, which led to a significant energy overhead. In this letter, we propose a lighting engine to improve the energy-efficiency by supporting the widely used advanced lighting models in hardware. It supports the Blinn-Phong, Oren-Nayar, and Cook-Torrance models, by exploiting the logarithmic arithmetic and optimizing the trigonometric function evaluations for the energy-efficiency. Experimental results demonstrate 12.7%, 42.5%, and 35.5% reductions in terms of power-delay product from the shader program implementations for each lighting model. Moreover, our work shows 10.1% higher energy-efficiency for the Blinn-Phong model compared to the prior art.

• International Journal of Internet, Broadcasting and Communication
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• 제16권2호
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• pp.75-80
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• 2024

Research on the visual narrative impact of Unreal Engine's Lumen lighting system in games aims to delve into how Lumen's lighting technology plays a crucial role in game design and gameplay experience, thereby enhancing the visual storytelling of games. Lumen, Unreal Engine's dynamic global illumination solution, calculates lighting and shadows in real-time during gameplay, creating a more realistic and immersive environment. Analysis indicates that Lumen technology not only provides visually realistic and dynamic lighting effects but also significantly enriches the expressiveness and immersion of the game narrative through its changes in light and shadow.

• 동력기계공학회지
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• 제18권3호
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• pp.87-92
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• 2014

This study is aimed at investigating the thermal behavior of immersion-cooled high power LED lighting engines. 3D CFD models have been generated for the numerical analysis. Five cases in terms of the configuration of LED chips have been explored for various passive cooling conditions of the lighting engine, i.e., the natural air convection with a lens, the natural air convection without a lens, the deionized water-immersion cooling condition with a lens. The numerical study reveals that the deionized water-immersion cooled lighting engine has nearly twice better thermal performance than the natural air convection cooled lighting engine containing a lens. The investigation has also demonstrated that the four chips configuration has the better thermal performance than the single chip configuration.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.541-542
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• 2008

We propose an architecture for a lighting engine for mobile 3D graphics. The proposed architecture has a variable pipeline depending on lighting effects and the number of lighting sources so that unnecessary operations and power consumption are minimized. We design a lighting engine basedon the proposed architecture using Verilog-HDL and synthesized it using a 0.25um CMOS standard cell library at 100MHz. The synthesis results show that it occupies 180,000 and 260,000 gates for 24bit and 32bit formats, respectively.

• 한국전기전자재료학회논문지
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• 제29권1호
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• pp.62-67
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• 2016

In this paper, the IES file was measured by applying a secondary optical lens to a 21 W LED engine, and the lighting calculation software RELUX was used to perform simulations with the data file of this measurement. For two-lane (two way) concrete paved roads, six LED engine are applied to each streetlight and simulation results show that Uo (uniformity) 0.56, UI (longitudinal uniformity) 0.86 and TI (threshold iIncrement) 9% which satisfies the required standards. RELUX was also used to LED streetlights by designing them in three dimensions, that is ${\pm}25%$ of the arm length of 2.8 m standardized by the road lighting standards of the Korea Expressway Corporation. Comparative analysis was carried out on adjustments were made in increments of 0.1 m that Uo, UI, and TI values in the range of arm lengths from 2.1 m~3.5 m. For the arm length range of 2.1 m~2.4 m, Uo was high, whereas UI was low. Therefore, we present the optimal light distribution values designed for an arm length of 2.5 m.

• 한국항해항만학회지
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• 제48권3호
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• pp.221-231
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• 2024

본 연구의 목적은 여객선 작업공간에서 활동하는 선원의 안전 및 정신건강 증진을 위하여 색차계를 사용한 작업공간의 밝기, 색채 값, 색 분포도, 선원의 인터뷰를 통해 문제점 및 개선 방향을 조사하는 것이다. 첫째, 선행 연구, 참고 문헌, 현행 제도 및 규격, 준사고 사례조사를 검토한 뒤 현재 운행 중인 M Ship의 조타실과 기관실을 대상으로 색차계를 사용하여 각 공간의 색상 값을 분석하였다. M Ship의 조타실과 기관 구역에 분포된 밝기와 색채 측정 결과 각 구역의 천장, 벽, 바닥의 밝기는 전체적으로 어두운 편이고 특히 기관 구역은 매우 어두운 편으로 나타났다. 색채에 관하여 각 구역의 천장엔 Green과 Blue가 분포되어 있으며 벽과 바닥엔 Red와 Blue가 분포되어 있었다. 작업공간에 근무하는 선원의 인터뷰 결과 노후한 실내환경과 어두운 작업환경, 미끄럽고 밝은 바닥재, 국내 사용자에게 맞지 않은 계단으로 인한 준사고 경험에 대해 응답하였다. 이에 따라 추후 조명 설치 시 밤과 낮을 구분하여 공간의 밝기 체크, 조명의 위치, 그림자 형성 수준 및 대비 정도, 시설의 반사율, 눈부심, 빛의 색을 고려한 조명 계획, 바닥의 색채계획 및 자재 선정, 국내 사용자에게 적합한 시설 설계에 관해 제안한다.

• 대한기계학회논문집
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• 제7권2호
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• pp.233-239
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• 1983

Gasification of rice chaff has traditionally been used to produce a clean fuel suitable for lighting, heating and engine application. Since oil crisis, a series of experimental study has been performed to drive a farm engine by agricultural wastes. We produced a combustible gas from rice chaff with a fixed bed up-draught gasifier system, and applied it to a conventional farm kerosene engine. This experiment was quite successful one. We could drive the farm engine with maximum horse power of 9 PS by rice chaff gas which was fairly competitive to the continuous horse power of 10 PS obtained when kerosene was used. Problems of tar existence in gas have been discussed, but we are confident that these can be solved in near future. Development and application of the gasification process will help our farm economy, not only by conserving petroleum oil but by utilizing agricultural wastes.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.663-666
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• 2005

The geometry stage, which performs the transformation and lighting operations of vertices, became the critical part in 3D graphics pipeline. In this paper, we have planned and designed the Geometry Processor for the better and more efficient way to process the real-time 3D using the floating point unit. We also designed a verification system for Geometry engine. It is implemented with Xilinx-Virtex2 and Visual C++.NET. In the Synopsis, we confirmed 100 MHz performance and 137107 cell area of Geometry Engine.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 제2회 학술대회 논문집 일렉트렛트 및 응용기술전문연구회
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• pp.1-8
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• 2000

Automotive electronics as we know it today encompasses a wide variety of devices and systems. Key to them all, and those yet to come. is the ability to sense and measure accurately automotive control parameters. In other words, sensors and actuators are the heart of any automotive electronics application. The important of sensors and actuators cannot be overemphasized. The future growth of automotive electronics is arguably more dependent on sufficiently accurate and low-cost sensors and actuators than on computers, controls, displays, and other technologies. Without them, all of controls system - engine. transmission. cruise, braking, traction, suspension, steering, lighting, windshield wipers, air conditioner/hearter - would not be possible. Those controls, of course, are key to car operation and they have made cars over the years more drivable, safe, and reliable. In this lecture, the principle and future trends of electronic control gasoline engine will be discuss.

• International journal of advanced smart convergence
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• 제12권2호
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• pp.96-101
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• 2023

Digital art creation has become an indispensable part of today's society, but traditional digital art production methods have been difficult to meet the growing creative needs of artists. Therefore, this study takes the cloud series works of artist Morten Lasskogen as an example and explores the application value of 3D Max and Unreal Engine in digital art created by analyzing the lighting effects in the works of art. This research aims to form reference materials through actual case analysis and provide artists with more efficient ideas for digital art creation.