Light-guide device having a plurality of light-guide elements for a vehicle control panel

• US 9,389,104 B2
• Filed: 08/06/2013
• Issued: 07/12/2016
• Est. Priority Date: 08/06/2012
• Status: Active Grant

• Current Assignee: Marelli Europe SPA
• Original Assignee: Magneti Marelli S.p.A.
• Inventors: Mouard, Sylvain, Masala, Luca, Ramella, Andrea
• Primary Examiner(s): Negron, Ismael
• Application Number:
  US13/960,257
• Publication Number:
  US 20140160721A1
• Time in Patent Office: 1,071 Days
• US Class Current: 1/1
• CPC Class Codes: B60K 2360/33 Illumination features
• CPC Class Codes: B60K 2360/336 Light guides
• CPC Class Codes: B60K 2360/341 Illumination of dials
• CPC Class Codes: B60K 2360/695 Dial features
• CPC Class Codes: B60K 2370/336 Light guides
• CPC Class Codes: B60K 2370/341 Illumination of dials
• CPC Class Codes: B60K 35/60 Instruments characterised by their location or relative disposition in or on vehicles arrangements of lighting devices on dashboards B60Q3/10
• CPC Class Codes: G01D 11/28 Structurally-combined illuminating devices
• CPC Class Codes: G01D 13/00 Component parts of indicators for measuring arrangements not specially adapted for a specific variable

Abstract

A light-guide device has a single piece body including a plurality of light guiding elements joined together by at least one supporting element. An opaque coating is provided on an outer surface of the at least one supporting element, to absorb the light entering into the supporting element from the light-guide elements.

Claims

1. A light-guide device, comprising:

a body made as a single piece of transparent material and including a plurality of light-guide elements having respective lighting portions for lighting respective indicators in a control panel, and respective transmission portions for guiding respective light beams towards said lighting portions;

said body including at least one supporting element which has a transparent outer surface and joins said light-guide elements to one another; and

an opaque coating which adheres only and directly onto said transparent outer surface of said supporting element so as to absorb the light exiting, in use, from said light-guide elements in said supporting element so as to prevent the light transmission in said supporting element from each said light-guide element to the adjacent light-guide elements.

2. The light-guide device as set forth in claim 1, wherein said outer surface is embossed.

3. The light-guide device as set forth in claim 1, wherein said at least one supporting element is defined by a single supporting element, which consists of a single rail and of a plurality of jumpers, each one joining a corresponding said transmission portion to said rail.

4. The light-guide device as set forth in claim 1, wherein said body includes said light-guide elements and a plurality of supporting elements, each of which joins two adjacent light-guide elements and is coated by said opaque coating.

5. The light-guide device as set forth in claim 1, wherein said plurality of light-guide elements are arranged parallel to one another along the longitudinal direction of said supporting element, and wherein each of the lighting portions and the transmission portions define, generally, an L shape such that the transmission portions extend orthogonal to said lighting portions.

6. A light-guide device as set forth in claim 5, wherein each light-guide element includes an angled surface extending at an angle to, and between said transmission portion and said lighting portion.

7. A light-guide device as set forth in claim 6, wherein said angled surface defines a chamfer extending at an angle of 45°

relative to said lighting portion and said transmission portion.