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Directional backlight

一种定向背光源、光源的技术，应用在光导领域，能够解决限制显示器观察自由度、增加观察者视觉疲劳、增加图像串扰水平等问题，达到高效自动立体显示、成本降低、增益光学输出的效果

Active Publication Date: 2016-02-10
REALD SPARK LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Undesirably, such displays exhibit image flickering when the observer moves laterally relative to the display, thus limiting the viewing freedom of the display
Such flicker can be reduced by defocusing the optics; however, such defocusing can result in increased levels of image crosstalk and increased observer fatigue
Such flicker can be reduced by adjusting the shape of the pixel holes, however, such changes can reduce display brightness and can include addressing the electronics in the spatial light modulator

Method used

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Examples

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Embodiment Construction

[0115] A time multiplexed autostereoscopic display can be advantageously achieved by directing light from all pixels of the spatial light modulator to a first viewing window in a first time slot and directing light from all pixels to a second viewing window in a second time slot. Two viewing windows improve the spatial resolution of the autostereoscopic display. Thus, an observer whose eyes are arranged to receive light in the first viewing window and the second viewing window will see a full resolution image across the entire display over multiple time slots. Time multiplexed displays can advantageously achieve directional illumination by directing an array of illuminators through a substantially transparent time multiplexed spatial light modulator using directional optics that are substantially in the plane of the window An image of an array of illuminators is formed.

[0116] The uniformity of the viewing window may advantageously be independent of the arrangement of the p...

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Abstract

A directional display may include a waveguide. The waveguide may include light extraction features arranged to direct light from an array of light sources by total internal reflection to an array of viewing windows and a reflector arranged to direct light from the waveguide by transmission through extraction features of the waveguide to the same array of viewing windows. The brightness of the directional display can be increased. An efficient and bright autostereoscopic display system can be achieved.

Description

[0001] Cross references to related patent applications: This application claims U.S. Provisional Patent Application 61 / 768,371 (Attorney Reference Docket 95194936.355000), filed February 22, 2013, entitled "Directional backlight"; "(Directional Backlight), U.S. Provisional Patent Application 61 / 791,112 (Attorney's Reference Docket No. 95194936.355000A); and U.S. Provisional Patent Application, filed October 14, 2013, entitled "Energy efficient directional backlight" 61 / 890,456 (Attorney's Reference Docket No. 95194936.355000B), each of which is incorporated herein by reference in its entirety. This application is also related to U.S. Patent Application 13 / 837,466 (Attorney Reference Docket 95194936.325001), entitled "Polarization recovery in directional display device," filed March 15, 2013, which is incorporated by reference in its entirety into this article. technical field [0002] The present invention relates generally to illumination of light modulation devices, and mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V8/00G02F1/1335G02B30/25
CPCG02B6/0048G02B6/0056G02B30/25G06F3/012G02B6/0051G02B6/0055G02B30/32
Inventor M·G·鲁宾逊G·J·伍德盖特
Owner REALD SPARK LLC