14.1: <i>Invited Paper</i>: Challenges and Technologies for Multi‐Channel Projection Systems

Vandenberghe, Patrick; Maximus, Bart

doi:10.1889/1.3069493

Cited by 5 publications

(2 citation statements)

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“…The expected increase in dynamic range to 5.000.000:1 using a combination of dimming systems has been validated [Vandenberghe 2008]. To enable communication of HDR image data from the image generator (rendering PC) to the projector, 16 bit gamma encoded input and the 23 bit equivalent processing path have been integrated into a projector.…”

Section: Expositionmentioning

confidence: 99%

A full HDR pipeline from acquisition to projection

Santos

Gierlinger

Huff

et al. 2010

ACM SIGGRAPH 2010 Posters

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Section: Expositionmentioning

confidence: 99%

A full HDR pipeline from acquisition to projection

Santos

Gierlinger

Huff

et al. 2010

ACM SIGGRAPH 2010 Posters

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“…Projection surfaces are often curved (as the one shown in the figure), so the depth of focus should be large enough to allow this, without the need of very complicated and expensive projection lenses. In order to obtain a seamless image in both day and night time simulation conditions, the projectors need to have excellent warping, blending and dimming capabilities [1] . The primary and secondary colors, and the white point of all these projectors have to be adjustable in order to obtain good color uniformity throughout the complete screen.…”

Section: Multi-projector Display Systemsmentioning

confidence: 99%

Future prospects of high-end laser projectors

Janssens

Malfait

2009

SPIE Proceedings

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During the last years, a trend to replace commonly used short arc lamps in projection systems with alternative light sources is seen. Next to LEDs for low light output products, lasers try to enter the projection area and have the ambition to infiltrate from low (picoprojection) towards high light output systems (digital cinema).One of the benefits of lasers is their narrow spectral bandwidth. As a consequence, the display can have a very large colour gamut, if the lasers are carefully selected. Another benefit is the very low intrinsic étendue of the source. One can imagine using less complex, more efficient, smaller but more powerful optical systems. This not only for scanning projectors, but also for 2D light valve based projectors (LCOS, LCD, DLP). In addition, the limited lifetime of lamps has serious impact on a system's cost of ownership, and puts light source reliability/lifetime high on the list of priorities for future developments. For this reason, Barco entered the European FP6-project OSIRIS, in a subtask where a 300 lm laser projector demonstrator has to be developed and evaluated.So far, we found out that next to obvious challenges such as laser cost and laser power, the most critical issue regarding image quality is speckle interference which counteracts the beneficial nature of the light source. This phenomenon is a direct consequence of the coherent nature of a laser and cannot be solved as easily as is often claimed. We will describe laser speckle in the context of laser projection and the theoretical limits of several reduction techniques. This leads to guidelines which can make laser projection worth considering.

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Chiral Nematic Liquid Crystal Displays

Coates

2014

Handbook of Liquid Crystals

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14.1: Invited Paper: Challenges and Technologies for Multi‐Channel Projection Systems

Cited by 5 publications

References 5 publications

A full HDR pipeline from acquisition to projection

A full HDR pipeline from acquisition to projection

Future prospects of high-end laser projectors

Chiral Nematic Liquid Crystal Displays

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