Abstract

Tinted vehicle windows are commonly used for different applications, among which are providing privacy, reducing transmitted sunlight in hot climates, and sometimes just for aesthetics among other uses. The work reported here was geared towards retaining these traditional aspects of tinted vehicle windows while adding a new display aspect component for custom display applications. We applied a low cost dual purpose diffusely transmitting and diffusely reflective pattern onto a polyvinyl chloride (PVC) plastic film. This custom-patterned film was then applied to both transparent and conventionally tinted vehicle window glass to observe the change in image quality projected onto them. For image projection we used a low cost VGA resolution, 45 lum liquid crystal on silicon (LCoS) Pico projector. Images were observed and recorded under the same ambient light environment. The field results showed significantly improved perceptibility with 200:1 contrast ratio, on tinted vehicle windows augmented with our custom pattern printed film. Whereas images projected on surfaces without the custom patterned film were literally imperceptible.

© 2011 IEEE

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References

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2009 (1)

B. Bauer, "Does Stevens's power law for brightness extend to perceptual brightness averaging?," Psychol. Rec. 59, 171-186 (2009).

1924 (1)

S. Hect, "The visual discrimination of visual intensity and the Weber–Fichner law," J. General Physiol. (1924).

J. General Physiol. (1)

S. Hect, "The visual discrimination of visual intensity and the Weber–Fichner law," J. General Physiol. (1924).

Psychol. Rec. (1)

B. Bauer, "Does Stevens's power law for brightness extend to perceptual brightness averaging?," Psychol. Rec. 59, 171-186 (2009).

Other (17)

P. G. J. Barten, Contrast Sensitivity of the Human Eye and Its Effects on Image Quality (Uitgeverij HV Press, 1999).

L. Edwards, “Canadian authorities to try 3D image of child to slow drivers,” http://www.physorg.com/news203054814.html.

D. Coldewey, “Apple Granted Patent for Insanely Complicated 3D display Method,” http://techcrunch.com/2010/12/01/apple-granted-patent-for-insanely-complicated-3d-display-method/.

S. S. Stevens, G. Stevens, Psychophysics: Introduction to Its Perceptual, Neural, and Social Prospects (Wiley, 1986).

M. Jansen, G. P. Carey, R. Carico, R. Dato, A. M. Earman, M. J. Finander, G. Giaretta, S. Hallstein, H. Hofler, C. P. Kocot, S. Lim, J. Krueger, A. Mooradian, G. Niven, Y. Okuno, F. G. Patterson, A. Tandon, A. Umbrasas, "Visible laser sources for projection displays," Proc. SPIE (2007) pp. 648908.

D. Darmon, J. R. McNeil, M. A. Handschy, "LED-illuminated pico projector architectures," SID Dig. (2008).

M. P. Krijn, B. A. Salters, O. H. Willemsen, "LED-based mini-projectors," Proc. SPIE (2006) pp. 619602-619614.

E. H. Stupp, M. S. Brennesholtz, Projection Displays (Wiley, 1999).

M. H. Keuper, G. Harbers, S. Paolini, "RGB LED illuminator for pocket-sized projectors," SID Dig. (2004) pp. 943-945.

G. Harbers, M. Keuper, S. Paolini, "High power LED illuminators for data and video projection," Proc. IDW (2002).

M. H. Keuper, S. Paolini, G. Harbers, "Ultra-compact LED based image projector for portable applications," SID Dig. (2003) pp. 713.

S. Dredge, Nokia World: Fancy a 100 GB mobile phone with a built-in projector? (2006) http://www.techdigest.tv/2006/11/nokia_world_fan.html.

J. Schöning, M. Rohs, S. Kratz, M. Löchtefeld, A. Krüger, "Map torchlight: A mobile augmented reality camera projector unit," Proc. 27th Int. Conf. Extended Abstracts on Human Factors in Comput. Syst. (2009).

R. Sprague, From Mobile Displays, Technology and Applications (Wiley, 2008).

A. Greaves, P. M. Kerman, E. Rukzio, K. Cheverst, J. Hakkila, "Exploring user reaction to personal projection when used in shared public places: A formative study," Mobile HCI 2009 Workshop: CAM3SN (2009).

M. L. Wilson, S. Robinson, D. Craggs, K. Brimble, M. Jones, "Pico-ing into the future of mobile projector phones," Proc. 28th Int. Conf. on Human Factors in Comput. Syst. (2010).

U.S. Dep. Traffic Audit Bur.“Adoncar Excerpts,” http://www.adoncar.com.au/documents/AdOnCar%20Fact%20Sheet%20March%202009.pdf.

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