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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 4 — Feb. 1, 2014
  • pp: 769–776

Potential improvements for dual directional view displays

Jonathan Mather, Lesley Parry Jones, Paul Gass, Akira Imai, Tomoo Takatani, and Koji Yabuta  »View Author Affiliations

Applied Optics, Vol. 53, Issue 4, pp. 769-776 (2014)

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Dual directional view (DDV) displays show different images to different viewers. For example, the driver of a car looking at a central DDV display could view navigation information, while the passenger, looking from a different angle, could be watching a movie. This technology, which has now established itself on the dashboards of high-end Jaguar, Mercedes, and Range Rover cars, is manufactured by Sharp Corporation using a well-known parallax barrier technique. Unfortunately parallax barriers are associated with an inevitable drop in brightness compared with a single view display. A parallax barrier-based DDV display typically has less than half the transmission of a single view display. Here we present a solution to these problems via the use of a combined microlens and parallax barrier system, which can not only boost the brightness by 55% from a parallax barrier-only system but increase the head freedom by 25% and reduce crosstalk also. However, the use of microlenses (which must be positioned between the polarizers of the LCD) can adversely affect the contrast ratio of the display. Careful choice of the LCD mode is therefore required in order to create a DDV display that is both high in brightness and contrast ratio. The use of a single-domain vertically aligned nematic (VAN) liquid crystal (LC) mode, together with a microlens plus parallax barrier system can achieve this with a contrast ratio of 17001 measured at 30° to normal incidence.

© 2014 Optical Society of America

OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(220.3630) Optical design and fabrication : Lenses
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.3720) Optical devices : Liquid-crystal devices
(110.3925) Imaging systems : Metrics
(130.3990) Integrated optics : Micro-optical devices

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: October 21, 2013
Revised Manuscript: December 16, 2013
Manuscript Accepted: December 16, 2013
Published: January 31, 2014

Jonathan Mather, Lesley Parry Jones, Paul Gass, Akira Imai, Tomoo Takatani, and Koji Yabuta, "Potential improvements for dual directional view displays," Appl. Opt. 53, 769-776 (2014)

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