Session Index

Solid State Lighting

Poster SessionⅠ
Friday, Dec. 4, 2015  11:30-12:30
Chair:
Room:
Notes: N/A
Paper No.  2015-FRI-P0801-P001
Hsin-Ying Lee Award Candidate Investigation of Green Micro-QDs-LEDs Using Color Conversion Technique and Reflectors


To enhance the color conversion efficiency of green quantum dots (QDs), hybrid Bragg reflector (HBR) and distributed Bragg reflector (DBR) were respectively stacked on bottom side and over QD slurry layer of the micro-QDs-LEDs. The green light intensity was enhanced by 21.0% in comparison with micro-QDs-LEDs without HBR and DBR.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P002
Chen-Hao Kuo Award Candidate Fabrication of White Flip-Chip Light Emitting Diodes by Substrate Transferring Technique


This study develop a phosphor template and flip-chip structure to produce uniform phosphor-converted white LEDs using laser lift-off, secondary transferring and surface roughening process. In the experiments, the FRGWB-LED reveals the better luminous flux and good angular correlated color temperature deviation in the range of -80° to +80°.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P003
Pei-Hsin Chen Award Candidate Ergonomic Control Model of an Intelligent Luminaire


This study evaluated the illumination provided by an intelligent luminaire in relation to two operating factors: correlated color temperature and task illuminance, with the presence of a computer monitor. An ergonomic control model based on the subjective brightness perceptions was established to define the satisfactory operating range.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P004
lee keng shuo Award Candidate Study of Thermal Activated Delayed Fluorescences doped in Red Phosphorescent Polymer Light- Emitting Devices


This study that we doped 2CzPN as the TADF material in red phosphorescent PLED. The triplet's non- radiative decay can be captured by 2CzPN and returned to singlet. The maximum luminance enhanced 112.6% and the EQE enhanced 74.8%. The device have color stable red emission.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P005
Shih-Yu Tu Award Candidate Efficient speckle suppressed white light by using overlapping diversity for a MEMS scanning beam area


Efficient-speckle-reduction results are demonstrated by using overlapping diversity. The speckle contrast (SC) can be reduced from 38.5% to 7.8% for a MEMS scanning blue image. The almost speckle-free result is achieved. Calculated mixing speckle contrasts show speckle-free results that could be used for illumination and display applications.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P006
Tsung-Hsun Yang Aging Characteristics of LEDs


We explores the essential characteristics of LEDs during their aging processes. One empirical model to describe the aging process of LEDs is proposed. Tens of LED bulbs are monitored on their normal operation to failure. Then, three aging characteristics of LEDs are found and analyzed.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P007
Bo-Yan Chen Dispersion Effect of White Light LED Lamp With Hemisphere Reflector


In this paper, the optical models of the four types white light LEDs are built, and the dispersion effects of the WLLED lamps with and without the hemisphere reflectors are compared in simulations and experiments. According to the results, the hemisphere reflector can reduce the maximum dispersion extent to about ten times.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P008
Ming-Chun Tseng Effect of Textured Aluminum-Doped Zinc Oxide of P-side up Thin-Film AlGaInP Light Emitting Diodes


A high-brightness p-side-up thin-film AlGaInP based light-emitting diodes (LEDs) with textured the AZO thin film by wet etching and ZnO nanorod arrays are presented is studied in this article. The textured AZO layer is deposited on the carbon-doped GaP cap layer by pulsed laser deposition to enhance the light extraction efficiency of LEDs. The output power of p-side-up thin-film AlGaInP LED with the textured AZO layer has improved up to 56.1 % (@ 350 mA) compared with that of LED without AZO film.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P009
An-Jye Tzou The study of InGaN-based green light-emitting diodes with low droop by quaternary InAlGaN/GaN superlattice electron blocking layer


We presented a low efficiency droop green light emitting diodes (LEDs) with a quaternary InAlGaN/GaN superlattice electron blocking layer (SL-EBL). A digital growth of quaternary SL-EBL was demonstrated. Furthermore, the light output power shows a 57% enhancement and only 30% efficiency droop was obtained.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P010
Sheng-Wen Wang The White-LED with micrometer pixel array quantum-dot film onto the sapphire substrate of the flip-chip LED


A novel quantum dots light-emitting diode with laser-processed microscale patterns has been demonstrated for white light emission. Via the pulsed laser ablation, microscale square holes with nano-ripple structures can be directly fabricated onto a sapphire substrate in flip-chip blue LED, confining sprayed quantum dots at specific areas and eliminating the coffee ring effect.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P011
Jian-Yu Shen Optical properties of cyclic remote phosphor structure of scattered photon extraction light-emitting diodes


This study presents a scattered photon extraction structure with a cyclic remote phosphor layer. The scattered photon extraction structure with a cyclic remote phosphor layer would be expected to provide high output power with good color rendering property.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P012
fang chi Luminance Contrast Study for Indoor Display and Lighting


This study investigates the visual fatigue of media viewing activities under different luminance contrast between indoor display and ambient lighting, in order to establish an adaptive control model.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P013
Shuo-Chieh Chang Color Speckle and Uniformity Simulation of Phosphor Converted Laser White Light


A method of simulating laser color speckle by Monte Carlo method and Mie theory has been introduced. Then we used this method to simulate white light generated by laser pumping phosphor. Accordingly, We further discussed the spatial color uniformity (∆u'v') of the phosphor converted white light pumped by different speckled blue laser light.

 Preview abstract
 
Paper No.  2015-FRI-P0801-P014
Shu-Yi Ho Experimental Verification with Numerical simulations in Multilayer Organic Light-Emitting Devices


The numerical simulation regarding optical and electrical processes simultaneously is vital for designing the device structures of organic light-emitting devices (OLEDs). The aim of this paper is to minimize the times of trial-and-error experiments and unveil the efficient method for optimizing the OLED performance. With the integration of electrical and optical simulations, the numerical data agrees with the experimental results.

 Preview abstract