Doubling the optical efficiency of color‐converted micro‐light‐emitting diode displays with a patterned cholesteric liquid crystal polymer film

2021 ◽  
Author(s):  
En‐Lin Hsiang ◽  
Yannanqi Li ◽  
Ziqian He ◽  
Tao Zhan ◽  
Caicai Zhang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Film ◽  
Light Emitting Diode ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Polymer ◽  
Optical Efficiency ◽  
Light Emitting ◽  
Crystal Polymer

Patterned cholesteric liquid crystal polymer film

2013 ◽  
Vol 30 (2) ◽  
pp. 252 ◽  
Author(s):  
Wei-Liang Hsu ◽  
Ji Ma ◽  
Graham Myhre ◽  
Kaushik Balakrishnan ◽  
Stanley Pau
Keyword(s):  
Liquid Crystal ◽  
Polymer Film ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer

scholarly journals Spiropyran doped rewritable cholesteric liquid crystal polymer film for the generation of quick response codes

2018 ◽  
Vol 8 (12) ◽  
pp. 3708 ◽  
Author(s):  
Gia Petriashvili ◽  
Lali Devadze ◽  
Andro Chanishvili ◽  
Cisana Zurabishvili ◽  
Nino Sepashvili ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Film ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Polymer ◽  
Quick Response ◽  
Crystal Polymer

scholarly journals Enhancing the Optical Efficiency of Near-Eye Displays with Liquid Crystal Optics

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 107
Author(s):  
Tao Zhan ◽  
En-Lin Hsiang ◽  
Kun Li ◽  
Shin-Tson Wu
Keyword(s):  
Virtual Reality ◽  
Liquid Crystal ◽  
High Efficiency ◽  
Berry Phase ◽  
Optical Element ◽  
Liquid Crystal Polymer ◽  
Proof Of Concept ◽  
Optical Efficiency ◽  
Crystal Polymer ◽  
Light Efficiency

We demonstrate a light efficient virtual reality (VR) near-eye display (NED) design based on a directional display panel and a diffractive deflection film (DDF). The DDF was essentially a high-efficiency Pancharatnam-Berry phase optical element made of liquid crystal polymer. The essence of this design is directing most of the display light into the eyebox. The proposed method is applicable for both catadioptric and dioptric VR lenses. A proof-of-concept experiment was conducted with off-the-shelf optical parts, where the light efficiency was enhanced by more than 2 times.

Cholesteric liquid crystal/polymer dispersion for haze‐free light shutters

1992 ◽  
Vol 60 (25) ◽  
pp. 3102-3104 ◽  
Author(s):  
D.‐K. Yang ◽  
L.‐C. Chien ◽  
J. W. Doane
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Polymer ◽  
Polymer Dispersion ◽  
Crystal Polymer

Application of broadband infrared reflector based on cholesteric liquid crystal polymer bilayer film to windows and its impact on reducing the energy consumption in buildings

2014 ◽  
Vol 2 (35) ◽  
pp. 14622 ◽  
Author(s):  
Hitesh Khandelwal ◽  
Roel C. G. M. Loonen ◽  
Jan L. M. Hensen ◽  
Albertus P. H. J. Schenning ◽  
Michael G. Debije
Keyword(s):  
Liquid Crystal ◽  
Energy Consumption ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Polymer ◽  
Bilayer Film ◽  
Crystal Polymer

scholarly journals Multiple-Color Reflectors Using Bichiral Liquid Crystal Polymer Films and Their Applications in Liquid Crystal Displays

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3031
Author(s):  
Cheng-Kai Liu ◽  
Ming-Hsien Li ◽  
Chi-Lun Ting ◽  
Andy Ying-Guey Fuh ◽  
Ko-Ting Cheng
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Polymer Films ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Polymer ◽  
Utilization Efficiency ◽  
Light Sources ◽  
Practical Applications ◽  
Crystal Polymer ◽  
Pitch Length

Multiple-color reflectors using bichiral liquid crystal polymer films (BLCPFs) are investigated. The BLCPFs consist of alternate layers of two different single-pitch cholesteric liquid crystal (CLC) layers, named CLC#A and CLC#B. The thickness of each CLC layer equals its single pitch length. The optical properties in terms of reflections, reflection-wavelength ranges, and distributions of reflection spectra of the BLCPFs that result from the fixed pitch length of CLC#A along with the decrease of the pitch length of CLC#B are qualitatively simulated and investigated. The results indicate that the above optical properties of the BLCPFs depend on the LC birefringence and pitch lengths of CLC#A and CLC#B layers. The concept of fabrication method of the BLCPFs by using polymerizable CLCs and thin films of poly(vinylalcohol) or photoalignment materials is discussed. They have potential practical applications in functional color filters, asymmetrical transmission systems, etc., owing to the multiple reflection bands of BLCPFs. Moreover, the BLCPFs, which can enhance the color gamut and light-utilization efficiency of light sources/LC displays, are reported herein.

scholarly journals Actively transparent display with enhanced legibility based on an organic light-emitting diode and a cholesteric liquid crystal blind panel

2013 ◽  
Vol 21 (8) ◽  
pp. 10358 ◽  
Author(s):  
Jeongho Yeon ◽  
Tae-Wook Koh ◽  
Hyunsu Cho ◽  
Jin Chung ◽  
Seunghyup Yoo ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Light Emitting Diode ◽  
Cholesteric Liquid Crystal ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Transparent Display
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