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heated lamp cover

A lamp cover and polymer technology, applied in heating elements, ohmic resistance heating, lighting and heating equipment, etc., can solve the problems of damaged heating wire connection, heating function failure, and easy failure of electrical contact parts, etc., to achieve stable electrical contact , to avoid the effect of damage

Active Publication Date: 2016-09-07
SAINT GOBAIN VITRAGE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a risk of damaging the heating wire or the connection between the heating wire and the electrical connection element
Furthermore, the method of thermoforming limits the design freedom regarding the shape of the lamp cover
In addition, the electrical contacts are prone to failure: if the electrically conductive connection between the two connecting elements is interrupted, for example, by breaking off the heating wire, the heating function fails completely

Method used

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Examples

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Embodiment Construction

[0059] figure 1 , image 3 and Figure 4 Correspondingly, details of a lamp cover 10 according to the invention for a passenger vehicle headlight are shown. The polymer matrix 1 contains polycarbonate (PC) and has a thickness of 4 mm. Six heating wires are arranged as lines 2 with a length of 20 cm on the inner side (I) of the polymer matrix 1 . The lines 2 are arranged parallel to each other and horizontally. Line 2 contains copper and has a thickness of 70 μm. The distance between two adjacent heating wires is 10mm. The lines 2 are embedded in the polymer matrix over their entire length by means of ultrasound, the penetration depth being approximately 45 μm.

[0060] Each line 2 is electrically connected to two bus bars 3 . The electrical connection between the lines 2 and the busbars 3 is achieved via an electrically conductive adhesive 5 . The bus bar 3 contains copper and has a thickness of 50 μm, a length of 6 cm and a width of 1 cm.

[0061] The bus bar 3 is co...

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Abstract

The invention relates to a heatable lamp cover (10), comprising at least: a polymer matrix (1), a first busbar (3), a second busbar (3) at the inner side (I) of the polymer matrix (1) ) and at least two lines (2), wherein each line (2) is electrically connected to the first bus bar (3) and to the second bus bar (3).

Description

technical field [0001] The invention relates to a heatable lamp cover, a method for the production of the lamp cover and the use thereof. Background technique [0002] The effectiveness of vehicle lighting can be compromised at low ambient temperatures, especially in winter. Snow, ice or condensed air moisture can accumulate on the outside of the cover of the vehicle light source. Air humidity can likewise condense and freeze on the inside of the lamp cover. This reduces the transparency of the lamp cover and impairs the functionality of the lighting. Safety in road traffic is adversely affected. [0003] Previously, vehicle headlights were preferentially equipped with halogen or xenon lamps. These lamps generate significant heat during operation. The heat is transferred to the lamp cover and causes thawing and / or drying of the lamp cover. More and more recently, vehicle headlights are equipped with light-emitting diodes (LEDs), which generate significantly less heat d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/84F21V29/90F21W101/02F21W101/10F21W107/10
CPCH05B3/84H05B2203/011H05B2203/004H05B2203/014F21V29/90F21S41/28F21S45/10F21S45/60Y10T29/49083B60S1/026B60S1/60H01C17/02H05B3/06
Inventor L.莱斯迈斯特A.施拉布S.施密特M.古尔丹
Owner SAINT GOBAIN VITRAGE SA
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