• Proceedings of the KSME Conference
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• 2008.11a
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• pp.1087-1090
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• 2008

This paper presents the electro-luminescence (EL) display lamp which is patterned on a curved surface by the pad printing method. The printing methods, including the gravure, screen, flexo, inkjet, and pad printing, have an advantage of one-step direct patterning. However, in general, the printing and semi-conductor process, except pad printing method, cannot be applied for patterning on a curved surface. Thus, in this paper, we used pad printing method for patterning an EL display lamp on a curved surface. The EL display lamp consists of 5 layers: Bottom electrode; Dielectric layer; Phosphor; Transparent electrode; Bus electrode. Finally, we printed EL display lamp on a dish, which has a radius of curvature 80mm. The EL display lamp was driven at AC 200V of 1kHz.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.479-482
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• 2007

For high performance driving carbon nanotube backlight units, their phosphor must be well studied. This paper experimentally evaluates their activating speed and persisting duration properties. They are proven to be the most efficiency related factors. High performance driving schemes are derived from them and implemented in this paper.

• International Journal of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.81-87
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• 2018

It is common practice to display high-quality video images on the large display among the methods of developing tourist attractions and culture in the region as experience contents differentiation is required. This paper combines the local attractions with the OLED dual layer display system and the extended image implementation and augmented interaction technique to give the experiencer a realistic space, such as directing to new experiences and beautiful sights. In this paper, we added UI layer to additional layers of images to enable users to experience sightseeing information, weather, maps, accommodation, festivals and photo materials with images. It is implemented to add fun through interlocking. We also developed transparent OLED and dual layer panel and 3-channel multi-image playback technique.

• ETRI Journal
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• v.41 no.1
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• pp.42-51
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• 2019

The rainbow hologram provides views of reconstruction with rainbow color within a large viewing zone. In our recent paper, a Fourier rainbow holographic display using diffraction grating and a white-light LED source was introduced. In this technique, the rainbow effect is realized by the dispersion of white-light source on diffraction grating, while the slit is implemented numerically by reducing the demands of the space-bandwidth product of the display. This paper presents a novel analysis on the visual perception of the Fourier rainbow holographic display using Wigner distribution. The view-dependent appearance of the image, including multispectral field of view and viewing zone, is investigated considering the observer and the display parameters. The resolution of the holographic view is also investigated. For this, a new quantitative assessment for image blur is introduced using Wigner distribution analysis. The analysis is supported with numerical simulations and experimentally captured optical reconstructions for the holograms of the computer model and real object generated with different slit size, reconstruction distance, and different observation conditions.

• Journal of the Semiconductor & Display Technology
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• v.20 no.3
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• pp.172-177
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• 2021

The HUD (Head-up Display) device for vehicles has gradually been advanced in connection with ADAS (Advanced Driver Assistant System) for the safety and the convenience of driving. In this paper, the major features (e.g. speed, RPM, etc.) of vehicles is received through the ECU and the route information is received through the navigating API, configurating the integrated GUI. And, the optical system is configured based on DLP (Digital Light Processing) to evaluate the visibility depending on the resolution change of the GUI. The IoT HUD system proposed in this paper has the scalability to flexibly add not only the ECU but also various cloud-based driving-related information.

• Proceedings of the Materials Research Society of Korea Conference
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• 2010.05a
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• pp.20.1-20.1
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• 2010

'Electronic paper (EP)' provides desirable viewing characteristics of paper with being thin, lightweight, flexible, and recordable with minimal power consumption. Currently, a number of different technologies to realize the EP are actively competing. Here we demonstrate a newly developed monolayer rotating ball (MRB) electronic paper display where optically anisotropic rotating balls were disposed in a monolayer, and controllably closely packed with respect to one another. The close packed monolayer configuration provides high brightness and improved contrast with better electrical and optical features in comparison with the typical (Gyrion) rotating ball display. In this talk, we present characteristics of the MRB display in terms of performance, with particular emphasis on the response time as a function of the electric field.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.419-422
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• 2005

In this paper, a display color characteristic simulation algorithm is proposed for nonstandard display units under development. In this algorithm, signal transformation matrix is calculated from the transfer characteristic of a nonstandard display unit to reproduce the same color of the one on a standard CRT display. Proposed algorithm can be used for the simulation of various color reproduction characteristics and the performance improvement of the nonstandard display.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.779-782
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• 2004

Establishing and maintaining optimum lamp operating temperature is critically important in backlight systems for large area displays. The information presented in this paper is based upon work completed for a tiled 37.5" AM LCD, plus projections for a 37.5", 42" & 50" monolithic display. Due to the size of the units, a requirement for highly collimated light and a requirement for high brightness, >550 nits at the display surface, significant wattage is required which generates high heat levels in the backlight display assembly and potentially, at the display rear surface. Uniformity of illumination becomes an important element in the system design because of the large area involved.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.3
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• pp.10-17
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• 2009

In this paper, we explained the relation between evaluating display device and emotional image quality evaluation in human perceptual view. It is also suggested two emotional image quality evaluation method of display reflecting human visual function. One is the color space of CIECAM02 and the other is capturing moving image. It is necessary to standardize the evaluation methods of image quality based on emotional evaluation.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1767-1770
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• 2007

The key development issues in the flexible displays are TFT backplane technology for their various applications, which requires competitive device performance as well as its low temperature process. In this paper, with shortly reviewing recent flexible display development status, we describe technical trends of low-temperature a-Si TFTs. Our TFTs show good device characteristics enough to apply LCD and electrophoretic display.