• Information Display
• /
• v.23 no.2
• /
• pp.15-23
• /
• 2022

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.270-271
• /
• 2007

LED를 이용한 램프개발 다목적 램프, 실내 조명용이나 전광판의 디스플레이용, 간판의 채널래터용으로 이용가능, LED 램프의 효율을 향상을 위해 반사판 설계, 3차원 설계로 반사판 설계 후 포토피아로 시뮬레이션 반사판과 글로브 형태 및 재질에 따른 광효율시뮬레이션

• Journal of Convergence for Information Technology
• /
• v.11 no.12
• /
• pp.90-96
• /
• 2021

In this paper, we designed manufactured and design an integrated interface control unit that has compatibility with brightness control unit, color control unit, and existing control unit. As the implementation method the standard of DVI/HDMI transmission method is applied to the data transmission method, and the Sil 1169 IC is used as the applied IC. Brightness control is programmed to have eight levels of brightness control using the AT89C2051. Also, EPM240T100C5 IC was used for image and dimming data processing. As a result, it is compatible with the control unit using the DVI/HDMI transmission method manufactured by each company and can reproduce clear high quality full HD video according to the surrounding brightness through the full color LED display system.

• 전자공학회논문지 IE
• /
• v.48 no.4
• /
• pp.25-29
• /
• 2011

Organic electroluminesencent device have been studied because of its easy fabrication and high brightness for plate panel display instead of CRT and LED. There are some device structure for full color filter system can be applicable to the full color application if the blue light organic electroluminesencent device(OELD) is developed. In this study, We have investigated electro-luminescent (EL) characteristics of organic EL device using Alq3, PBD as emitting material. Current and luminance can be seen that express a similar relativity in voltage and could know that luminance is expressing current relativity.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.61 no.9
• /
• pp.1275-1282
• /
• 2012

This paper proposes the 16-channel LED Driver IC for Full color LED display system. The proposed LED driver IC in this paper can draw current independent of temperature and supply voltage in each channel. Current flow in the channel is configurable via an external resistor. LED brightness is adjusted by 12-Bit PWM(Pulse Width Modulation) and 8-Bit DC(Dot Correction). A real-time monitoring of IC temperature ($130^{\circ}C/150^{\circ}C$) and LED status (open/short) is provided by LED driver IC and the user can receive warning and get information on problems. A 16-channel LED driver IC is produced using 0.35 um BCD process and the size is $2.5mm{\times}2.5mm$. In this paper, channel current characteristic and channel current control function were measured in order to verify am embodied 16-channel LED driver IC by producing a single IC test board.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.50 no.10
• /
• pp.135-141
• /
• 2013

In this paper, we installed three high brightness red, green, and blue LED in one socket and made one pixel unit. And we also developed the full-color display board module and control unit which can express various images such as text, graphics, video image with the combination of pixel units and a number of modules. LED display driver module have a driver circuit within the combination of the RGB pixel dot on unit area. These modules of the existing form can be high priced because of implementation a fixed resolution in specific space and installation space. To overcome these shortcomings, we developed a LED driver and LED pixel modules free in array at random pitch intervals. Display board module of this paper enabled to display smoothly video image which have many data processing quantity through dragging data speed up 36 frames per second. Also there are an effect which is provided more clear image because of improving the flickering of the existing display board.