Lightweight, compact 2D/3D autostereoscopic LCD backlight for games, monitor, and notebook applications

Eichenlaub, Jesse B.

doi:10.1117/12.274468

Cited by 17 publications

(9 citation statements)

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“…LCD shutter glasses are popular for CRT displays [1][2][3] , as are polarizing glasses for projection displays and new technologies including auto-stereoscopic (no glasses) flat panel LCD displays [4][5][6][7][8][9] . Several of these systems are also capable of user head tracking to enable wide viewing freedom and update of the stereoscopic image to simulate look-around.…”

Section: Introductionmentioning

confidence: 99%

<title>Controlling perceived depth in stereoscopic images</title>

et al. 2001

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electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modication of the content of the paper are prohibited. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. ABSTRACTStereoscopic images are hard to get right, and comfortable images are often only produced after repeated trial and error. The main difficulty is controlling the stereoscopic camera parameters so that the viewer does not experience eye strain or double images from excessive perceived depth. Additionally, for head tracked displays, the perceived objects can distort as the viewer moves to look around the displayed scene. We describe a novel method for calculating stereoscopic camera parameters with the following contributions:(1) Provides the user intuitive controls related to easily measured physical values. (2) For head tracked displays; necessarily ensures that there is no depth distortion as the viewer moves. (3) Clearly separates the image capture camera/scene space from the image viewing viewer/display space. (4) Provides a transformation between these two spaces allowing precise control of the mapping of scene depth to perceived display depth.The new method is implemented as an API extension for use with OpenGL, a plug-in for 3D Studio Max and a control system for a stereoscopic digital camera. The result is stereoscopic images generated correctly at the first attempt, with precisely controlled perceived depth. A new analysis of the distortions introduced by different camera parameters was undertaken.

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Section: Introductionmentioning

confidence: 99%

<title>Controlling perceived depth in stereoscopic images</title>

et al. 2001

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“…A larger viewing region is provided by using HOEs [48]. Instead of producing diamond-shaped regions, the right image is directed to the right side of the viewing field, and the left image to the left.…”

Section: Multiple Image: Binocular Fixed Viewing Zonesmentioning

confidence: 99%

A Survey of 3DTV Displays: Techniques and Technologies

Benzie

Watson

Surman

et al. 2007

IEEE Trans. Circuits Syst. Video Technol.

198

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The display is the last component in a chain of activity from image acquisition, compression, coding transmission and reproduction of 3-D images through to the display itself. There are various schemes for 3-D display taxonomy; the basic categories adopted for this paper are: holography where the image is produced by wavefront reconstruction, volumetric where the image is produced within a volume of space and multiple image displays where two or more images are seen across the viewing field. In an ideal world a stereoscopic display would produce images in real time that exhibit all the characteristics of the original scene. This would require the wavefront to be reproduced accurately, but currently this can only be achieved using holographic techniques. Volumetric displays provide both vertical and horizontal parallax so that several viewers can see 3-D images that exhibit no accommodation/convergence rivalry. Multiple image displays fall within three fundamental types: holoform in which a large number of views give smooth motion parallax and hence a hologram-like appearance, multiview where a series of discrete views are presented across viewing field and binocular where only two views are presented in regions that may occupy fixed positions or follow viewers' eye positions by employing head tracking. Holography enables 3-D scenes to be encoded into an interference pattern, however, this places constraints on the display resolution necessary to reconstruct a scene. Although holography may ultimately offer the solution for 3DTV, the problem of capturing naturally lit scenes will first have to be solved and holography is unlikely to provide a short-term solution due to limitations in current enabling technologies. Liquid crystal, digital micromirror, optically addressed liquid crystal and acoustooptic spatial light modulators (SLMs) have been employed as suitable spatial light modulation devices in holography. Liquid crystal SLMs are generally favored owing to the commercial availability of high fill factor, high resolution addressable devices. Volumetric displays provide Manuscript both vertical and horizontal parallax and several viewers are able to see a 3-D image that exhibits no accommodation/convergence rivalry. However, the principal disadvantages of these displays are: the images are generally transparent, the hardware tends to be complex and non-Lambertian intensity distribution cannot be displayed. Multiple image displays take many forms and it is likely that one or more of these will provide the solution(s) for the first generation of 3DTV displays.

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“…Although an auto-stereoscopic display based on the controlled backlight illumination method need not to put an optical element in front of a display panel [7], the problems mentioned above remain. A multi-projector display method, which forms multiple exit pupils aligned horizontally, can form auto-stereoscopic image with large viewing area without degrading image resolution [2].…”

Section: Introductionmentioning

confidence: 99%

Multi-user autostereoscopic display based on direction-controlled illumination using a slanted cylindrical lens array

et al. 2014

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This research aims to develop an auto-stereoscopic display, which satisfies the conditions required for practical use, such as, high resolution and large image size comparable to ordinary display devices for television, arbitrary viewing position, multiple viewer availability, suppression of nonuniform luminance distribution, and compact system configuration. In the proposed system, an image display unit is illuminated with a direction-controlled illumination unit, which consists of a spatially modulated parallel light source and a steering optical system. The steering optical system is constructed with a slanted cylindrical array and vertical diffusers. The direction-controlled illumination unit can control output position and horizontal angle of vertically diffused light. The light from the image display unit is controlled to form narrow exit pupil. A viewer can watch the image only when an eye is located at the exit pupil. Auto-stereoscopic view can be achieved by alternately switching the position of an exit pupil at viewer's both eyes, and alternately displaying parallax images. An experimental system was constructed to verify the proposed method. The experimental system consists of a LCD projector and Fresnel lenses for the direction-controlled illumination unit, and a 32 inch full-HD LCD for image display.

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Lightweight, compact 2D/3D autostereoscopic LCD backlight for games, monitor, and notebook applications

Cited by 17 publications

References 0 publications

<title>Controlling perceived depth in stereoscopic images</title>

<title>Controlling perceived depth in stereoscopic images</title>

A Survey of 3DTV Displays: Techniques and Technologies

Multi-user autostereoscopic display based on direction-controlled illumination using a slanted cylindrical lens array

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