CH629907A5 - LIGHT PANEL DEVICE. - Google Patents

Description

The present invention relates to a device for light panels, in particular for advertising, indicator or signaling articles, comprising a light source and two or more transparent panels juxtaposed by their large faces, each panel bearing in various places inscriptions and having one of its edges facing the light source.

In British patent No 664.556, a device of this kind is described, comprising two transparent panels juxtaposed by their large face, each panel bearing inscriptions and having one of its edges facing a light source. In this device, the effects of color contrast are obtained by applying paint to said inscriptions.

In the British patent 639,667, a device for luminous panels is described comprising several transparent panels juxtaposed by their large face, each panel bearing inscriptions and being able to be illuminated by one of its sections individually and not simultaneously with the other panels, by a first light source. . This device also includes an additional transparent panel, not juxtaposed with the other panels, and which can be illuminated by one of its edges by a second light source.

The aim is to make a device of the type in question in a simple manner in which different inscriptions can be seen with different colors, thereby giving rise to particularly remarkable contrast effects.

In order to achieve this goal, there is provided, according to the invention, a device of the type described in the preamble, characterized in that the aforesaid sections of the transparent panels are simultaneously illuminated by the light source, the above section of one of the panels being colored and the aforementioned edge of the other panel (s) being colorless or of a color different from that of the first aforesaid panel, the inscriptions of each panel being illuminated by the light flux coming from the light source and passing through its edge above.

In order to clearly understand the invention, an exemplary embodiment of a light sign will be described below with reference to the drawings in which:

Figure 1 is a schematic view of the sign device in vertical section.

Figure 2 shows a sign fragment in front view.

Figure 3 is a sectional view along line III-III in Figure 2.

As shown in FIG. 1, the light sign device given by way of example comprises a housing 1 inside which a light source 2 is provided, for example a luminescent tube (neon) as well as two or possibly several transparent panels 3-4 juxtaposed by their large faces, mounted in one of the faces of the housing and held together by a frame 5.

Optionally, the housing may not exist.

As shown in the example, an opaque plate 6 can be provided which is held by the frame 5 with the transparent panels 3-4.

Each transparent panel 3-4 carries in various places inscriptions 7-8 generally obtained by an etching and / or frosting operation.

An important characteristic is that the section 9-10 of each panel located opposite the light source 2 receives a coloring in a different color. In the example, this section is covered by a colored strip 11-12, each strip having a different coloring from its neighbor. For example, the strip 11 provided for the panel 4 will be colored in red while the strip 12 corresponding to the panel 13 will be colored in green.

It is understood that one or more sections can remain without coloring and that the number of panels can be greater than two.

It is understood that, when the light source is supplied with current, the light rays produced by the source 2 give rise, when they pass through each section 9-10, to luminous fluxes having different colors from one panel to the other. other and propagating in a rectilinear direction in each panel.

When each of these flows meets one of the surfaces 7-8, there is a light scattering, that is to say that the rays are reflected in beams as shown in 13 (FIG. 3) so that the observer finding in 14 sees the inscription of each surface 7 or 8 illuminated in different colors, that is, in the example, respectively in green and in red which gives rise to a contrast effect.

The panels can be made of a plastic material such as polymethyl methacrylate (PMMA) known under the trade name of "Plexiglas" or "Perspex".

According to an important characteristic, and as shown more particularly in FIG. 3, the inscription can be formed by a flat surface 15 obtained by frosting while the contours or lines are engraved giving rise to a groove 16 in which the reflection could take place in a different way.

Thanks to this combination of etching and etching

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629 mi we thus obtain on the edges of the inscription a light cord which further improves the aesthetic effect of the device. The cut of the engraved groove can have any shape but it should be noted that the shape of a prism whose faces are inclined at 45 ° gives the maximum light output for an observer placed from the front.

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1 sheet of drawings

Claims (7)

629,907 1. Device for light panels, in particular for advertising, indicator or signaling articles, comprising a light source and two or more transparent panels juxtaposed by their large faces, each panel bearing in various places inscriptions and having one of its face sections at the light source, characterized in that the aforesaid sections (9-10) of the transparent panels (3-4) are simultaneously illuminated by the light source (2), the above section of one of the panels being colored and the said slice of the other panel (s) being colorless or of a different color from that of the first aforesaid panel, the inscriptions (7-8) of each panel being illuminated by the light flux coming from the light source and passing through its aforesaid slice. 2. Device according to claim 1, characterized in that the coloring of the wafer is obtained by a strip applied to the wafer. 2 3. Device according to claim 1, characterized in that the transparent panels (3-4) are kept assembled together by a frame (5). 4. Device according to any one of claims 1 to 3, characterized by an opaque plate (6) held assembled with the transparent panels by the frame (5). 5. Device according to claim 1, characterized in that the transparent panels are made of a plastic material, for example methyl methacrylate. 6. Device according to any one of claims 1 to 5, characterized in that the inscription is formed by a surface obtained by frosting while the contour or contours or lines are engraved giving rise to a groove producing a light cord . 7. Device according to claim 6, characterized in that the section of the groove is that of a prism whose faces are inclined at 45%.