Variable barrier pitch correction

A distance and display technology, applied in the field of autostereoscopic 3D systems, which can solve problems such as imperfect head tracking 3D technology

Inactive Publication Date: 2017-04-19
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This approach is not without drawbacks: it is technically very challenging to fabricate high-quality switchable LC barriers
[0012] Even with these advances, current head-tracking 3D technology is far from perfect

Method used

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Embodiment

[0095] 1. In a first embodiment, a tracking system is used in combination with a camera and a fixed parallax barrier 3D display. This system is in Figure 5 shown in a. A parallax system (NP6-3stag1) with a repeating staggered pattern of 6 sub-pixels, a slanted barrier with a slope of 1 pixel per row and a slit of 3 pixels wide gives very good tracking performance. Part of this good performance is due to "redundant" sub-pixels that are initially hidden from the user and can be preloaded with view information. As the user moves and these hidden sub-pixels are revealed, the correct view information can be maintained for each eye. The image processing hardware is configured to implement method 1 and / or method 2 as described above.

[0096] 2. In a second embodiment, a tracking system is used in combination with a camera and a switchable parallax barrier. The barrier can be switched in a discrete manner, such as Figure 5 As shown in c, the electrodes are used to control the ...

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Abstract

Two methods are described for calculating the non-periodic display pixel pattern necessary for good viewing properties of a multiple view directional display with a fixed parallax barrier pitch. These methods could also be used to calculate optimum barrier pitch parameters for a display with a re-configurable parallax optic, such as a re-configurable parallax barrier, and a fixed pixel assignment, or to calculate hybrid system parameters in a display where the parallax optic (eg a parallax barrier) and the pixel assignment are both re-configurable. The first method uses a geometrical analysis to calculate a non-integer subpixel repeat unit for interlacing. In this approach interlacing starts at a point determined by the user's head position relative to the display. The non-integer number ensures that the interlace pattern inserts extra pixels where necessary in order to compensate for the user's head position. The second method uses a pixel-by-pixel calculation step, whereby every pixel's position relative to the user's eyes and the nearest slit of the barrier determines whether the pixel should show left-view or right-view information. This approach may be done for blocks of pixels, but performance is optimal when calculated on a pixel-by-pixel basis.

Description

technical field [0001] The present invention relates to a multiple view directional display, such as an autostereoscopic (glasses-free) 3D system that maintains the 3D effect as the user's head moves closer to or away from the display. The invention is compatible with parallax barrier systems and lenticular lens systems. The invention can be used in other applications, for example, to display different 2D content to multiple different users in a commercial "Dual View" display. Background technique [0002] For years, people have been trying to create better autostereoscopic 3D displays, and the present invention is a further advance in this field. Autostereoscopic displays are displays that give stereoscopic depth without requiring the user to wear glasses. This is achieved by projecting a different image to each eye. Autostereoscopic 3D displays can be achieved by using parallax optics techniques such as parallax barriers or lenticular lenses. [0003] The design and op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/04G02B27/22G02B30/28G02B30/31
CPCH04N13/305H04N13/373H04N13/376H04N13/31H04N13/398G02B30/31G02B30/28G02B30/26G02B30/27
Inventor 乔纳森·马瑟L·思温·黄亚历山大·萨瓦茨基福里斯特·布伦南
Owner SHARP KK
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