P‐12.1: The Optimal Technique of Color Shift Based on Reverse Dispersion Material

2021 ◽  
Vol 52 (S2) ◽  
pp. 965-967
Author(s):  
Bowen Li ◽  
Feifei Wang ◽  
Kaixuan Wang ◽  
Hongming Zhan ◽  
Xi Chen ◽  
...  
Keyword(s):  
Optimal Technique ◽  
Color Shift

Information Theoretic Analysis and Performance Gains of 3-Color Shift Keying

2021 ◽  
pp. 1-1
Author(s):  
Alexandros E. Tzikas ◽  
Panagiotis D. Diamantoulakis ◽  
George K. Karagiannidis
Keyword(s):  
Theoretic Analysis ◽  
Information Theoretic ◽  
Color Shift ◽  
Shift Keying ◽  
And Performance ◽  
Performance Gains

LP-4: Late-News Poster: Overdrive for Compensating Color-Shift on Field Sequential Color TFT-LCDs

2004 ◽  
Vol 35 (1) ◽  
pp. 408 ◽  
Author(s):  
Kazuo Sekiya ◽  
Kazuhiro Wako ◽  
Shigeru Nakano ◽  
Takahiro Ishinabe ◽  
Tetsuya Miyashita ◽  
...  
Keyword(s):  
Color Shift ◽  
Late News

Prognostics Health Management Model for LED Package Failure Under Contaminated Environment

2015 ◽  
Author(s):  
Pradeep Lall ◽  
Hao Zhang ◽  
Lynn Davis
Keyword(s):  
Health Management ◽  
Luminous Flux ◽  
The State ◽  
Remaining Useful Life ◽  
Integrating Sphere ◽  
State Estimator ◽  
Acceptable Error ◽  
Color Shift ◽  
Useful Life ◽  
The Impact

The reliability consideration of LED products includes both luminous flux drop and color shift. Previous research either talks about luminous maintenance or color shift, because luminous flux degradation usually takes very long time to observe. In this paper, the impact of a VOC (volatile organic compound) contaminated luminous flux and color stability are examined. As a result, both luminous degradation and color shift had been recorded in a short time. Test samples are white, phosphor-converted, high-power LED packages. Absolute radiant flux is measured with integrating sphere system to calculate the luminous flux. Luminous flux degradation and color shift distance were plotted versus aging time to show the degradation pattern. A prognostic health management (PHM) method based on the state variables and state estimator have been proposed in this paper. In this PHM framework, unscented kalman filter (UKF) was deployed as the carrier of all states. During the estimation process, third order dynamic transfer function was used to implement the PHM framework. Both of the luminous flux and color shift distance have been used as the state variable with the same PHM framework to exam the robustness of the method. Predicted remaining useful life is calculated at every measurement point to compare with the tested remaining useful life. The result shows that state estimator can be used as the method for the PHM of LED degradation with respect to both luminous flux and color shift distance. The prediction of remaining useful life of LED package, made by the states estimator and data driven approach, falls in the acceptable error-bounds (20%) after a short training of the estimator.

scholarly journals Quest for the optimal technique of laparoscopic splenectomy – vessels first or hilar transection?

2018 ◽  
Vol 13 (4) ◽  
pp. 460-468 ◽  
Author(s):  
Dorota Radkowiak ◽  
Anna Zychowicz ◽  
Michał Wysocki ◽  
Anna Lasek ◽  
Piotr Major ◽  
...  
Keyword(s):  
Laparoscopic Splenectomy ◽  
Optimal Technique

scholarly journals Light Leakage of Multidomain Vertical Alignment LCDs Using a Colorimetric Model in the Dark State

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Chuen-Lin Tien ◽  
Rong-Ji Lin ◽  
Shang-Min Yeh
Keyword(s):  
Liquid Crystal ◽  
Contrast Ratio ◽  
Liquid Crystal Displays ◽  
Vertical Alignment ◽  
Dark State ◽  
Proposed Model ◽  
Color Shift ◽  
Depolarization Of Light ◽  
The Difference ◽  
Color Filters

Light leakage from liquid crystal displays in the dark state is relatively larger and leads to a degraded contrast ratio and color shift. This work describes a novel colorimetric model based on the Muller matrix that includes depolarization of light propagating through liquid crystal molecules, polarizers, and color filters. In this proposed model, the chromaticity can be estimated in the bump and no-bump regions of an LCD. We indicate that the difference between simulation and measurement of chromaticity is about 0.01. Light leakage in the bump region is three times that in no-bump region in the dark state.

Design of a projection display screen with vanishing color shift for rear-projection HDTV

1996 ◽  
Author(s):  
Xiu Liu ◽  
Jin-lin Zhu
Keyword(s):  
Color Shift ◽  
Projection Display ◽  
Rear Projection

Color-Shift Keying—How Its Largest Obtainable “Minimum Distance” Depends on Its Preset Operating Chromaticity and Constellation Size

2017 ◽  
Vol 35 (13) ◽  
pp. 2724-2733 ◽  
Author(s):  
Amena Ejaz Aziz ◽  
Kainam Thomas Wong ◽  
Jung-Chieh Chen
Keyword(s):  
Minimum Distance ◽  
Color Shift ◽  
Shift Keying ◽  
Constellation Size

scholarly journals Modern Rotational Radiation Techniques with Volumetric Modulated Arc Therapy or Helical Tomotherapy for Optimal Sparing of the Lung and Heart in Left-Breast Cancer Radiotherapy Plus Regional Nodal Irradiation: A Comparative Dosimetric Analysis

Cancers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 5043
Author(s):  
Pei-Yu Hou ◽  
Chen-Hsi Hsieh ◽  
Le-Jung Wu ◽  
Chen-Xiong Hsu ◽  
Deng-Yu Kuo ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Subgroup Analysis ◽  
Helical Tomotherapy ◽  
Volumetric Modulated Arc Therapy ◽  
Left Breast ◽  
Contralateral Breast ◽  
Normal Organ ◽  
Regional Nodal Irradiation ◽  
Optimal Technique ◽  
Arc Therapy

Background: For advanced breast cancer with lymph node involvement, adjuvant radiotherapy (RT) with regional nodal irradiation (RNI) has been indicated to reduce cancer recurrence and mortality. However, an extensive RT volume is associated with normal organ exposure, which increases the toxicity and affects patient outcomes. Modern arc RT techniques can improve normal organ sparing compared with conventional techniques. The aim of this study was to explore the optimal technique for left-breast RT with RNI. Methods: We retrospectively reviewed patients receiving RT with RNI for left-breast cancer. We used modern arc RT techniques with either volumetric-modulated arc therapy (VMAT) or helical tomotherapy (HT) with a novel block technique, and compared differences in dosimetry parameters between the two groups. Subgroup analysis of RNI with or without internal mammary node (IMN) volume was also performed. Results: A total of 108 eligible patients were enrolled between 2017 and 2020, of whom 70 received VMAT and 38 received HT. The median RT dose was 55 Gy. No significant differences were found regarding the surgery, RT dose, number of fractions, target volume, and RNI volume between the VMAT and HT groups. VMAT reduced the heart mean dose more than HT (3.82 vs. 5.13 Gy, p < 0.001), as well as the cardiac parameters of V5-V20, whole-lung mean dose, lung parameters of V5-V20, and contralateral-breast and esophagus mean dose. In the subgroup analysis of RNI with IMNs, the advantage of VMAT persisted in protecting the heart, lung, contralateral breast, and esophagus. HT was beneficial for lowering the thyroid mean dose. For RNI without IMN, VMAT improved the low-dose exposure of the heart and lung, but HT was similar to VMAT in terms of heart, whole-lung, and contralateral-breast mean dose. Conclusions: For patients with left-breast cancer receiving adjuvant RT with RNI, VMAT reduced the exposure dose to the heart, lung, contralateral breast, and esophagus compared with HT. VMAT was superior to HT in terms of normal organ sparing in the patients who underwent RNI with IMN irradiation. Considering the reduction in normal organ exposure and potential toxicity, VMAT is the optimal technique for patients receiving RNI when deep inspiration breath-hold is not available.

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