• Bulletin of the Korean Chemical Society
• /
• 제34권5호
• /
• pp.1366-1370
• /
• 2013

A series of phosphorescent iridium(III) complexes 1-4 based on phenylpyrazole were synthesized and their photophysical properties were investigated. To evaluate their electroluminescent properties, OLED devices with the structure of ITO/NPB/mCP: 8% Iridium complexes (1-4)/TPBi/Liq/Al were fabricated. Among those, the device with 3 showed the most efficient white emission with maximum luminance of 100.6 $cd/m^2$ at 15 V, maximum luminous efficiency of 1.52 cd/A, power efficiency of 0.71 lm/W, external quantum efficiency of 0.59%, and CIE coordinates of (0.35, 0.40) at 15.0 V, respectively.

• 전기학회논문지P
• /
• 제52권2호
• /
• pp.61-67
• /
• 2003

To improve the luminance and luminous efficiency of a surface-discharge alternate current plasma display panel, we analyzed the sustain discharge characteristics as the voltage of the address electrode In the study. As the results, when the address voltage is a half of the sustain voltage in the sustain period, the luminance and luminance efficiency are the highest. The luminance efficiency increased about 16.2%~20.8% compared with the conventional type.

• 한국인터넷방송통신학회논문지
• /
• 제11권5호
• /
• pp.19-25
• /
• 2011

최근 그린 IT 기술이 이슈화 되면서 전 세계적으로 탄소 배출을 낮추고 에너지 효율을 높일 수 있는 환경 친화적인 광원에 대한 연구가 활발히 진행되고 있으며, 특히 고유가와 환경오염 등의 문제로 기존의 백열등이나 형광등을 대체하기 위한 새로운 광원으로 LED가 크게 주목을 받고 있다. 본 논문에서는 저전력, 고효율, 고휘도의 LED 모듈에 온도, 습도, 조도, 그리고 이동 감지 센서를 포함한 복합 센서 모듈을 조합하여 가로등을 지능화하고, ZigBee 모듈을 이용하여 가로등 간에 IT기술인 USN 망 융합을 통하여, 가로등 시스템을 중앙에서 모니터링하고 지역 특성에 따라 선택적으로 가로등의 점멸을 원격으로 제어함으로써 효과적으로 에너지 절약을 극대화할 수 있는 Ad-Hoc망 기반 LED-IT-Sensor 통합 가로등을 설계하고 구현하였다.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
• /
• pp.491-494
• /
• 2004

With recent experiments to add He atoms to the Ne-Xe discharge gas mixture for high luminous efficiency PDPs, we have performed simulations on a coplanar structured AC-PDP sustained in the three species He-Ne-Xe gas mixture. We found that the correct ion mobilities are essential to get the meaningful simulation results. We determined ion mobilities in the mixture gas and presented the calculated results regarding the influence of ion mobilities on discharge characteristics.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2002년도 학술대회논문집
• /
• pp.3-8
• /
• 2002

In this paper, We measured an electric and optical characteristics for electrodeless fluorescent lamp system. We used the CCD(charged couple device) and Integrating Sphere Photometer to detect the accurate variation of data and got a characteristic of output voltage and current, luminance, luminous flux etc. And then we come to understand that the efficiency of electrodeless fluorescent lamps are similar to CFLs(compact fluorescent lamp) or HID(high intensity discharge lamp).

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
• /
• pp.1372-1375
• /
• 2007

MgO thin films were deposited by $O^+$ IBAD method and results showed assisting oxygen ion beam energy plays a significant role in characteristics of MgO thin films. The lowest firing inception voltage, the highest brightness and the highest luminous efficiency were obtained when oxygen ion beam energy was 300 eV.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
• /
• pp.1591-1593
• /
• 2008

The tubular field emission lamp (FEL) was developed using a wire type carbon-nano-structure emitter called CNX The luminous efficiency of the tubular FEL (diode type, diameter: ${\varphi}15.5mm$, length: 200mm) has already achieved around 45lm/W and we expect to achieve over 60lm/W within the year.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
• /
• pp.646-648
• /
• 2003

The electrical and optical characteristics of the cold cathode fluorescent lamps (CCFL) were measured and investigated under the wide ambient temperatures ranging from $-30^{\circ}C$ up to $+100^{\circ}C$. The highest luminous efficiency of the CCFL of 55 lm/W was obtained at the ambient temperature of $50^{\circ}C$.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2003년도 제25회 학술발표회 초록집
• /
• pp.200-200
• /
• 2003

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
• /
• pp.1523-1526
• /
• 2009

We present highly polarized light emissions from an OLED on a flexible photonic anisotropic substrate. It was found that the polarization direction of emitted electroluminescent light corresponded to the ordinaryaxis of the photonic anisotropic substrate. Furthermore, it was also found that luminous polarized electroluminescence over 4,500 cd/$m^2$ was produced with high peak efficiency of 6 cd/A and high polarization ratio over 25.