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Curved vehicle windshield made from laminated glass

A windshield and laminated glass technology, applied in windshield, glass/slag layered products, layered products, etc., can solve problems such as enlargement

Active Publication Date: 2010-11-17
SAINT-GOBAIN GLASS FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at smaller line widths, the ghosted lines appear separate from the actual image lines and are thus perceived separately by the viewer, making ghosting a particularly annoying experience
On the other hand, a larger HUD field of view is required for more data, which increases ghosting at the upper and lower edges of the HUD field of view

Method used

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  • Curved vehicle windshield made from laminated glass
  • Curved vehicle windshield made from laminated glass
  • Curved vehicle windshield made from laminated glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] figure 1 The basic travel of the beam after it is emitted is shown, where the beam passes through the curved windshield 1 to form a transmitted ghost in the driver's eye 2 . The primary light beam P emitted from the light source 3 enters the driver's eye 2 as a primary light beam P' after being deflected twice on both surfaces of the glass plate 1 . However, the eye perceives the bright light source 3 as a primary image 3' on the extension of the primary beam P'. Inside the glass sheet 1 a small part of the primary beam P is reflected twice on the glass surface and leaves the glass sheet as a secondary beam S. The driver's eyes 2 will see a ghost image 3" on the extension of the secondary light beam S. In the region where the primary light beam emitted from the light source 3 passes through the glass plate 1, the glass plate 1 has a radius of curvature R c curvature. The angle defined by the primary beam P' and the secondary beam S is the so-called ghost angle η.

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PUM

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Abstract

Interfering double images that occur with curved windshields made from laminated glass during night driving in transmission and with head-up displays in reflection can be reduced by a wedge-shaped thermoplastic intermediate film. The wedge-angle profile required for compensation of double images is determined locally as a function of pane shape and installation situation. If the vehicle has a head-up display system, the wedge-angle progression can be determined in the HUD field such that double images are prevented there in reflection. However, outside the HUD field, a wedge-angle progressionthat compensates double images in transmission is selected. The specifically adapted wedge- angle profile enables better compensation of double images than is possible with a film with a constant wedge angle.

Description

technical field [0001] The present invention relates to curved motor vehicle windshields made of laminated glass, the outer and inner surfaces of which are wedged with one another to prevent or reduce disturbing ghost images, at least in preferred areas. Background technique [0002] Ghost images, also known as ghost images, can be very annoying to motor vehicle drivers. In principle, a distinction is made between two different types of ghosting, that is, on the one hand those that arise in transmission under certain contrast conditions, and on the other hand when using a head-up display to see to the ghosting. [0003] Ghost images produced in transmission through a curved windshield often appear during night driving, from headlight reflections of oncoming vehicles or other bright light sources. The ghost image is produced as a result of multiple reflections on the windshield surface, when a part of the incident beam, the so-called secondary beam, leaves the windshield at...

Claims

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Application Information

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IPC IPC(8): B32B17/10B32B27/30G02B27/01B60J1/00
CPCB32B17/10568G02B2027/011B32B17/10036G02B27/0101B60J1/02
Inventor M·拉布罗特V·奥弗曼J-E·德萨林斯
Owner SAINT-GOBAIN GLASS FRANCE