A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight

T. Saruta, A. Tagaya, Yasuhiro Koike

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

A combination of front-scattering film and directional backlight has been proposed as a system for wide-viewing-angle transmissive liquid-crystal display (LCD). This system does not require precisely controlled phase difference film presently used in commercial LCDs, which is expected to make LCDs simpler and less expensive. However, this system has not, as far as we know, been put into practical use due to the blurring of images and the whitening of the scattering film that causes the degradation of contrast. In this article, we designed a scattering film that causes little blurring of images and whitening by optimizing conditions of light-scattering particles added to a polymer film and addition of the dye. The blurring of images was inhibited by doping polymer film with particles of high relative refractive index. The whitening of the scattering film was inhibited by the addition of the dye. The film in which particles were dispersed and accumulated showed different luminance properties and blurring of images at the same particle concentration. Finally, a directional backlight covered with the optimized scattering film showed equivalent luminance properties to those of a commercial backlight and demonstrated the feasibility of this system.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7955
DOIs
Publication statusPublished - 2011
EventEmerging Liquid Crystal Technologies VI - San Francisco, CA, United States
Duration: 2011 Jan 252011 Jan 26

Other

OtherEmerging Liquid Crystal Technologies VI
CountryUnited States
CitySan Francisco, CA
Period11/1/2511/1/26

Fingerprint

Liquid Crystal Display
Liquid crystal displays
liquid crystals
Scattering
Angle
blurring
scattering
Polymer films
Luminance
Coloring Agents
Dyes
luminance
Polymers
dyes
Light scattering
causes
Phase Difference
polymers
Light Scattering
Refractive index

Keywords

  • directional backlight
  • light scattering
  • liquid-crystal display
  • viewing angle

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Saruta, T., Tagaya, A., & Koike, Y. (2011). A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7955). [79550G] https://doi.org/10.1117/12.874415

A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight. / Saruta, T.; Tagaya, A.; Koike, Yasuhiro.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7955 2011. 79550G.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Saruta, T, Tagaya, A & Koike, Y 2011, A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7955, 79550G, Emerging Liquid Crystal Technologies VI, San Francisco, CA, United States, 11/1/25. https://doi.org/10.1117/12.874415
Saruta T, Tagaya A, Koike Y. A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7955. 2011. 79550G https://doi.org/10.1117/12.874415
Saruta, T. ; Tagaya, A. ; Koike, Yasuhiro. / A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7955 2011.
@inproceedings{d60ded186d6242558d620d83f6daecd6,
title = "A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight",
abstract = "A combination of front-scattering film and directional backlight has been proposed as a system for wide-viewing-angle transmissive liquid-crystal display (LCD). This system does not require precisely controlled phase difference film presently used in commercial LCDs, which is expected to make LCDs simpler and less expensive. However, this system has not, as far as we know, been put into practical use due to the blurring of images and the whitening of the scattering film that causes the degradation of contrast. In this article, we designed a scattering film that causes little blurring of images and whitening by optimizing conditions of light-scattering particles added to a polymer film and addition of the dye. The blurring of images was inhibited by doping polymer film with particles of high relative refractive index. The whitening of the scattering film was inhibited by the addition of the dye. The film in which particles were dispersed and accumulated showed different luminance properties and blurring of images at the same particle concentration. Finally, a directional backlight covered with the optimized scattering film showed equivalent luminance properties to those of a commercial backlight and demonstrated the feasibility of this system.",
keywords = "directional backlight, light scattering, liquid-crystal display, viewing angle",
author = "T. Saruta and A. Tagaya and Yasuhiro Koike",
year = "2011",
doi = "10.1117/12.874415",
language = "English",
isbn = "9780819484925",
volume = "7955",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight

AU - Saruta, T.

AU - Tagaya, A.

AU - Koike, Yasuhiro

PY - 2011

Y1 - 2011

N2 - A combination of front-scattering film and directional backlight has been proposed as a system for wide-viewing-angle transmissive liquid-crystal display (LCD). This system does not require precisely controlled phase difference film presently used in commercial LCDs, which is expected to make LCDs simpler and less expensive. However, this system has not, as far as we know, been put into practical use due to the blurring of images and the whitening of the scattering film that causes the degradation of contrast. In this article, we designed a scattering film that causes little blurring of images and whitening by optimizing conditions of light-scattering particles added to a polymer film and addition of the dye. The blurring of images was inhibited by doping polymer film with particles of high relative refractive index. The whitening of the scattering film was inhibited by the addition of the dye. The film in which particles were dispersed and accumulated showed different luminance properties and blurring of images at the same particle concentration. Finally, a directional backlight covered with the optimized scattering film showed equivalent luminance properties to those of a commercial backlight and demonstrated the feasibility of this system.

AB - A combination of front-scattering film and directional backlight has been proposed as a system for wide-viewing-angle transmissive liquid-crystal display (LCD). This system does not require precisely controlled phase difference film presently used in commercial LCDs, which is expected to make LCDs simpler and less expensive. However, this system has not, as far as we know, been put into practical use due to the blurring of images and the whitening of the scattering film that causes the degradation of contrast. In this article, we designed a scattering film that causes little blurring of images and whitening by optimizing conditions of light-scattering particles added to a polymer film and addition of the dye. The blurring of images was inhibited by doping polymer film with particles of high relative refractive index. The whitening of the scattering film was inhibited by the addition of the dye. The film in which particles were dispersed and accumulated showed different luminance properties and blurring of images at the same particle concentration. Finally, a directional backlight covered with the optimized scattering film showed equivalent luminance properties to those of a commercial backlight and demonstrated the feasibility of this system.

KW - directional backlight

KW - light scattering

KW - liquid-crystal display

KW - viewing angle

UR - http://www.scopus.com/inward/record.url?scp=79953724878&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79953724878&partnerID=8YFLogxK

U2 - 10.1117/12.874415

DO - 10.1117/12.874415

M3 - Conference contribution

AN - SCOPUS:79953724878

SN - 9780819484925

VL - 7955

BT - Proceedings of SPIE - The International Society for Optical Engineering

ER -