Effects of Auxiliary Electrode Width in AC Plasma Display Panels With Auxiliary Electrodes

Lee, Sung-Min; Choi, C. S.; Choi, Kyung Cheol

doi:10.1109/jdt.2010.2064757

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…Moreover, there are some pieces of evidences proving that SiO2 position in the silicone film and the chromatic quality have a rational relation. In addition, their particles sizes considerably impact the pcLEDs' color temperature [15].…”

Section: Introductionmentioning

confidence: 99%

Utilizing CaCO3, CaF2, SiO2, and TiO2 phosphors as approaches to the improved color uniformity and lumen efficacy of WLEDs

2021

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The two elements that are most favorable in the quality evaluation for phosphor-converted LEDs (pcLEDs) these days are the chromatic homogeneity and the lumen output. In this study, a thorough research on enhancing color uniformity and luminous flux of pcLEDs that have a high correlated color temperature (CCT) of 8500K is carried out. The scattering enhancement particles (SEPs): CaCO3, CaF2, SiO2, and TiO2 are used to accomplish the goal by adding them to a yellow phosphor compounding Y3Al5O12:Ce 3+ , and comparing their characteristics afterwards. LightTools program is used to build an optical simulation and Mie-scattering theory helps to examine the achieved results. Specifically, the parameters included in SEPs' scattering calculation are the scattering coefficients, the anisotropic scattering, the reduced scattering, and the scattering amplitudes at 455 nm and 595 nm. The outcomes presented that compared to other SEPs, TiO2 particles can yield the highest chromatic homogeneity. However, the lumen output reduces considerably as TiO2 concentration greatly increases while it can be bettered when using SiO2 particles with any particle size. For CaCO3 particles, the color deviation of 620 K CCT can be reduced with 30% concentration, leading to the recommendation of using CaCO3 to promote the CCT homogeneity and luminescence efficiency.

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Section: Introductionmentioning

confidence: 99%

Utilizing CaCO3, CaF2, SiO2, and TiO2 phosphors as approaches to the improved color uniformity and lumen efficacy of WLEDs

2021

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“…Cdse QDs, an semiconductor in group II-VI, is regarded as the most effective ones out of all QDs and has high market value for possessing hyper quantum efficiency over 95%, full width at half maximum (FWHM) from 20-30 nm and can cover the whole cognitive range by customizing the size of particles. Recognizing the advantages of CdSe QDs, researchers were focused on using CdSe QDs to manufacturer the earliest QDs WLEDs on the market [13,14]. Even though the usage of CdSe QDs WLEDs are widespread from common lighting application to advanced purpose of backlighting, its potential is limited as a result of containing Cd, a substance that is harmful to human [15].…”

Section: Introductionmentioning

confidence: 99%

LaSiO3Cl:Ce3+,Tb3+ and Mg2TiO4:Mn4+: quantum dot phosphors for improving the optical properties of WLEDs

Loan

Anh

2020

IJECE

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In this research, we focus on the solutions to enhance the lighting properties as well as the heat regulation of the white light-emitting diodes (WLEDs) with conventional phosphor and quantum dots (QDs). Although receiving lots of attention for being an innovative lighting solution with good color rendering index, the potentials of WLEDs conjugated with quantum dots (QDS), especially the QDs-phosphor mixed nanocomposites ones, are restrained due to the lacking performance in the aspects mentioned above. The crucial requirement to produce better WLEDs is finding solutions that improve the lacking aspects, therefore, through observing previous studies and applying advanced technique, this research suggest an effective and unique packaging configuration, in which the nanocomposites QDs-phosphor layer is set horizontally to the WLED. This novel packaging configuration allow WLED performance in terms of lighting and heating to reach it peaks. This is the first time four different types of WLEDs, single-layer phosphor, dual-layer remote phosphor with yellow-red and yellow-green, and triple-layer phosphor, were simulated, utilized and compared in one study to decide the best WLED configuration. The results show that the triple-layer phosphor configurations improve the color rendering ability and lumen output better than the other configurations.

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“…Even though the benefits are undoubtedly valuable but they could not be widely used due to the high producing cost and difficult manufacturing requirements. Therefore, SEPs such as TiO2, ZrO2, microspheres and SiO2 are more practical materials that can mix with yellow phosphor to create new phosphor compositions are being used [14][15][16][17][18]. The research conduct by Lee with his partner in 2010 which dispersed TiO2 on pcLEDs to exam the possibility that color homogeneity can benefit from adding 0.1% TiO2 to the encapsulated phosphor component.…”

Section: Introductionmentioning

confidence: 99%

The influences of calcium fluoride and silica particles on improving color homogeneity of WLEDs

2020

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The LEDs lighting device with phosphor ingredient (pcLEDs) is among the most common lighting methods in recent years and evaluated by chromatic uniformity and lighting capacity. Therefore, we introduce the phosphor particles that can improve the scattering efficiency (SEPs) to apply in pcLEDs at 8500 K correlated color temperature (CCT) with the expectation to produce better pcLEDs by enhancing both quantity and quality of emitted light.Combining various materials such as CaF2 and SiO2 with yellow Y3Al5O12:Ce 3+ phosphor composition in the pcLEDs simulation created by the LightTools program is the mechanism of this research. The simulated pcLEDs are tested and the results will be verified with Mie-scattering theory. The observation of the simulation leads to the conclusion about the scattering coefficients of SEPs at 455 nm and 595 nm wavelengths. The calculation showed that CaF2 is better for color homogeneity yet suffer from luminous flux deficiency as the concentration gets higher. On the other hand, SiO2 is the scattering enhancement material that can maintain high luminous flux regardless of its concentration.

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Effects of Auxiliary Electrode Width in AC Plasma Display Panels With Auxiliary Electrodes

Cited by 4 publications

References 19 publications

Utilizing CaCO<sub>3</sub>, CaF<sub>2</sub>, SiO<sub>2</sub>, and TiO<sub>2</sub> phosphors as approaches to the improved color uniformity and lumen efficacy of WLEDs

Utilizing CaCO<sub>3</sub>, CaF<sub>2</sub>, SiO<sub>2</sub>, and TiO<sub>2</sub> phosphors as approaches to the improved color uniformity and lumen efficacy of WLEDs

LaSiO3Cl:Ce3+,Tb3+ and Mg2TiO4:Mn4+: quantum dot phosphors for improving the optical properties of WLEDs

The influences of calcium fluoride and silica particles on improving color homogeneity of WLEDs

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