DE102008003638B4 - display device - Google Patents

Abstract

Display device comprising a printed circuit board (1) on which one or more light sources are arranged and having a transmittable film (6), particularly a color film, which extends freely over the light sources and is arranged at two opposite end regions (7) ) is connectable to the printed circuit board (1), wherein the end regions (7) of the film (6) in recesses (3) of the printed circuit board (1) protrude.

Description

The The invention relates to a display device with a printed circuit board, on the one or more light sources are arranged and with a observer arranged in front of the light sources or transilluminable film, especially colored foil.

at Such display devices, it is known, the color film firmly on a carrier or housing part to arrange.

This requires special support components and complex assembly processes.

A once installed color foil is no longer interchangeable.

From the post-published DE 10 2006 031 345 A1 is a display device with a printed circuit board, on which one or more light-emitting diodes are arranged, known, wherein the observer side in front of the light source, a film is arranged, which extends freely over the circuit board and is connectable to the printed circuit board at two opposite end portions.

Furthermore, from the DE 103 05 760 A1 . DE 199 41 589 C2 . DE 20 2006 006 889 U1 . DE 85 29 956 U1 and DE 43 11 937 A1 Lighting devices or display devices with a cover of the light source known, but which is not a film.

task The invention is therefore a display device of the beginning to create the aforementioned type, the o. g. Disadvantages avoids, simply constructed and easy to install.

These The object is achieved by a Display device solved with the features of claim 1. The Color foil extends freely over the Light sources and is at two opposite end with the circuit board connectable. The end regions of the film protrude to Connection to the circuit board in recesses of the circuit board. In this case, the bending stress of the film as a holding force to the holder exploited the end portions of the color foil in the recesses.

By spans this training as an independent Component formed film the light sources and is only at their End regions connected to another component, namely the circuit board.

In order to the structure of the display device is simple and the foil light mountable.

The both end regions extend toward the printed circuit board, so that in the uninstalled state extending in a plane Foil is in the installed state under bending stress.

are the two end regions of the film can be detachably connected to the printed circuit board, so is a simple exchange of films of different colors easily possible.

Around over To be able to extend a plurality of light sources, the film can be ribbon-like be formed and have at their band ends the end portions.

It is possible, that the end regions of the film by means of fastening elements with the circuit board are connectable.

are the end regions of the color film can be positively connected to the printed circuit board, so are no special components, in particular no fasteners to attach the Fo required, what the structure and installation the display device simplified.

Preferably the recesses are formed continuously and the end portions the film protrude through the recesses.

Around the end portions of the film even in vibration in their installed position to hold the end regions have a narrowing area which reduces their width have, which can be arranged in the recess.

This is particularly advantageous if the display device in a Motor vehicle is installed, which in driving significant shocks can be exposed.

One Tilt the film in its mounting position due to uneven mounting the end portions are avoided if the end portion is two of their width decreasing, opposing necking areas have, which can be arranged in the recess.

there becomes an automatic Solve the End areas of the color foil further complicated from their installation position, when the constricted areas at least approximately have rectangular cross-section.

to easy insertability the end portions of the film in the recesses may be in the circuit board insertion slots be formed, which is at least approximately at right angles to the extension extend the film and open into the recesses.

Preferably, the insertion slots open with their one end to an edge of the lei terplatte to the outside.

Münden the insertion slots with its other end in the end region of the recesses closer to the light sources, so the end portions of the film snap under the bending stress in the Recesses and are therefore very safe in their installed position held.

to easy mounting, the film can be a symmetrical structure exhibit.

The Foil may be in the area in front of one or more of the light sources have a translucent color imprint, so that of a Observer perceived light a color mixture of the color of the light emitted from the light source and the color of the color imprint is.

Besides can Be areas without color imprint, allowing light from an observer perceived in the mix of the color of the light source and the foil becomes. Is the film colorless transparent and the light source colored, so light is perceived in the color of the light source.

Around while achieving a forced positional adjustment in the installation position, can the end of the recesses removed from the light sources have a V-like decreasing cross-section.

A heat stress the foil through the light sources is avoided when the light sources are light emitting diodes are.

One embodiment The invention is illustrated in the drawing and will be described below described in more detail. Show it

1 a perspective section of a display device

2 a plan view of a circuit board of the display device according to 1

3 a plan view of a color foil of the display device according to 1 ,

The display device shown in the figures has a printed circuit board 1 on, preferably in SMD technology, a group of four light-emitting diodes 2 is arranged.

The required conductor tracks are not shown.

On opposite sides of the group of LEDs 2 is in each case a continuous rectangular recess 3 in the circuit board 1 formed, whose the light-emitting diodes 2 Removed side has a V-like decreasing training.

Right-angled to an imaginary connecting line between the recesses 3 lead from the light-emitting diodes 2 nearer end areas insertion slots 4 to the edge 5 the circuit board 1 ,

One in not installed state in 3 illustrated translucent color foil 6 is formed like a strip with the same width and has at its end 7 two width-reducing, opposite constriction areas 8th rectangular cross section so that between the constricted areas 8th a band area 9 lesser width remains, this smaller width of the width of the recesses 3 equivalent. The length of the band areas 9 is greater than the thickness of the circuit board 1 ,

The distance between the two bands 9 smaller width is greater than the distance between the two recesses 3 from each other.

For mounting the color foil 6 this is extended over the light emitting diodes, the end regions 7 to the circuit board 1 bent and the band areas 9 lesser width from the edge 5 the circuit board 1 through the insertion slots 4 pushed until the band areas 9 in the recesses 3 engage.

This engagement takes place by the bending stress of the color foil 6 caused by the elastic bending of the end areas 7 the normally stretched color foil 6 arises.

The steps 10 at the ends of the band areas 9 form stops on the top and bottom of the Lei terplatte 1 abut and the color foil 6 secure in their mounting position.

By different colors of separately controllable LEDs 2 it depends on the driven LED 2 to a different color detectable by the observer, by mixing the color of the driven LED 2 and the color of the color foil 6 arises.

1

circuit board

2

LEDs

3

recess

4

insertion slots

5

edge

6

color film

7

end regions

8th

constriction areas

9

band ranges

10

stages

Claims (12)

Display device with a printed circuit board ( 1 ), on which one or more light sources are arranged, and with a transmittable foil arranged in front of the light source (s) ( 6 ), in particular color film which extends freely over the light sources and at two opposite end regions ( 7 ) with the printed circuit board ( 1 ) is connectable, wherein the end regions ( 7 ) of the film ( 6 ) in recesses ( 3 ) of the printed circuit board ( 1 ) protrude. Display device according to claim 1, characterized in that the end regions of the film by means of fastening elements with the printed circuit board ( 1 ) are connectable. Display device according to claim 1, characterized in that the end regions ( 7 ) of the film ( 6 ) in a form-fitting manner with the printed circuit board ( 1 ) are connectable. Display device according to one of claims 1 to 3, characterized in that the recesses ( 3 ) are formed continuously through the printed circuit board and the end regions ( 7 ) of the film ( 6 ) the recesses ( 3 ). Display device according to claim 4, characterized in that the end regions ( 7 ) has a narrowing area ( 8th ), which in the recess ( 3 ) can be arranged. Display device according to claim 4, characterized in that the end regions ( 7 ) two width-reducing, each gegenüberlie lowing Einschnürbereiche ( 8th ), which in the recess ( 3 ) can be arranged. Display device according to one of the preceding claims, characterized in that the constricting regions ( 8th ) have at least approximately rectangular cross-section. Display device according to one of the preceding claims, characterized in that in the printed circuit board ( 1 ) Insertion slots ( 4 ) are formed, which are at least approximately at right angles to the extent of the film ( 6 ) and into the recesses ( 3 ). Display device according to one of the preceding claims, characterized in that the film ( 6 ) has a symmetrical structure. Display device according to one of the preceding Claims, characterized in that the film in front of one or in front of several of the light sources a translucent color imprint having. Display device according to one of the preceding claims, characterized in that the end region of the recesses ( 3 ) has a V-like decreasing cross-section. Display device according to one of the preceding claims, characterized in that the light sources light-emitting diodes ( 2 ) are.