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Backlight for 3D display device

A display device, 3D technology, applied in mechanical equipment, light guides of lighting systems, light guides, etc., can solve problems such as screen resolution reduction

Active Publication Date: 2008-11-05
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Perceived screen resolution reduction when the diffuser is in front of the lenticular sheet

Method used

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  • Backlight for 3D display device
  • Backlight for 3D display device
  • Backlight for 3D display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] see figure 1 and 2 , according to the invention, a backlight 5 for an autostereoscopic display comprises a light source 6 and a light guide 7 .

[0038] The light guide 7 is formed from a sheet of optically transparent material, such as polymethyl methacrylate (PMMA). Preferably, the light guide 7 is plate-shaped and rectangular, comprising two main faces and four side faces constituting the front and rear faces 7f, 7b of the light guide. A plurality of parallel V-section grooves 8 are provided on the front surface 7f of the light guide, spaced at regular intervals. The light source 6 is arranged close to the side 7s of the light guide. The light source 6 may be an LED (Light Emitting Diode) or a CCFL (Cold Cathode Fluorescent Lamp).

[0039] A material 9 whose refractive index is higher than that of the light guide 7 , such as polymethyl methacrylate, is arranged on the front surface 7 f of the light guide and fills the groove 8 . In one embodiment, the material ...

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PUM

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Abstract

A backlight (5) for a 3D display device, the backlight (5) comprising a planar light guide (7) through which light is guided transversely by internal reflection. The light guide (7) is provided with a plurality of grooves (8), which are configured to direct light propagating within the light guide (7), out of a face of the light guide (7) so as to form a plurality of line light sources.

Description

technical field [0001] The invention relates to a backlight for a 3D display device comprising a planar light guide through which light is guided laterally via internal reflection. Background technique [0002] Recently, research and development of three-dimensional (3D) image display has made rapid progress. Of the various ideas proposed, many rely on users wearing special glasses to see 3D images. However, it is inconvenient for users to wear glasses, and such systems can only allow a single user to see 3D images at a time. Therefore, for reasons of improving cost performance and user convenience, a display system that does not require the user to wear glasses has been developed. Such display systems are known as autostereoscopic displays. [0003] Autostereoscopic displays typically comprise a conventional display panel, such as an LCD (Liquid Crystal Display) panel, combined with parallax providing means necessary to ensure that the user's left and right eyes correctl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/00F21V8/00
CPCG02B6/0038G02B6/0056G02F1/1335
Inventor M·P·C·M·克里恩W·L·伊泽尔曼S·T·德兹瓦特H·J·科恩利森
Owner KONINK PHILIPS ELECTRONICS NV