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Forming method of PVB film for HUD and PVB film prepared through same

A molding method and imaging technology, applied in the field of glass, can solve problems such as hidden dangers of safe driving, ghosting in HUD imaging, and changes in imaging clarity.

Active Publication Date: 2018-07-06
SAINT-GOBAIN GLASS FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the wedge-shaped cross-section in only one direction will cause changes in the clarity of the HUD's imaging when viewing the HUD from different angles for a large-area HUD.
For example: when looking at the HUD from a certain angle, the imaging is clear, but when looking at the HUD from another angle, the imaging will be uniform because the cross-sectional shape of the PVB film at this angle is uniform, resulting in the HUD imaging at this angle. There will be ghosting, which will cause the driver to be unable to see the data displayed on the HUD clearly and need to adjust the viewing angle, which will distract attention, so there is a certain hidden danger to safe driving

Method used

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  • Forming method of PVB film for HUD and PVB film prepared through same
  • Forming method of PVB film for HUD and PVB film prepared through same
  • Forming method of PVB film for HUD and PVB film prepared through same

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Embodiment Construction

[0040] figure 1 Be the sectional view of common windshield in the prior art, refer to figure 1 It can be seen that a common windshield includes an outer glass 1 , an inner glass 2 and a common PVB film 3 with uniform thickness. The ordinary PVB film 3 has good cohesiveness, toughness and elasticity. When the windshield is violently impacted by an external force, the ordinary PVB film 3 will absorb a large amount of energy, and glass fragments will firmly adhere to the ordinary PVB film. Glass shards will not fly, thereby minimizing possible injuries. But the common PVB film 3 in the prior art is not suitable for HUD imaging, and reason is: common windshield is generally the form of laminated glass, and common windshield has the inclination angle, and under the situation of uniform PVB film thickness, the whole Ordinary windshields are generally uniform in thickness, so two reflected images that are staggered from each other will be formed during HUD imaging, so that two over...

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Abstract

The invention relates to a forming method of a PVB film for a HUD. The forming method comprises the following steps that a, PVB raw materials are clamped between two protection films and placed into apreheated die; or one protection film is placed into the preheated die at first, the PVB raw materials are placed on the first protection film, and finally the second protection film is placed on thePVB raw material; b, die assembly is carried out; c, the die is pressed and heated till reaching the needed temperature; d, the formed PVB film and the two protection film are taken out; e, the formed PVB film is cooled; and f, the two protection films are taken down, and the PVB film for the HUD is obtained. The invention further relates to the PVB film formed through the method.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to a method for manufacturing a PVB film for HUD by using PVB raw materials, such as common PVB films, based on a thermocompression forming process. Background technique [0002] Head up display (HUD for short), which allows the pilot to see the important information he needs without looking down, thereby reducing the frequency of the pilot needing to look down at the instrument, avoiding interruption of attention and loss of state awareness (Situation Awareness) mastery. Therefore, it is widely used in high-end models of aircraft and vehicles as a driving aid. [0003] At present, since the HUD generally uses the front windshield of the aircraft or vehicle for display, and these front windshields are generally laminated glass, that is to say, these front windshields have two interfaces inside and outside, which will form two images with different positions. , and the brightness is ...

Claims

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Application Information

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IPC IPC(8): B29C51/08B29C51/14B29C51/42B29C51/46
CPCB29C51/082B29C51/14B29C51/421B29C51/46
Inventor 郭晓锋
Owner SAINT-GOBAIN GLASS FRANCE
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