Surface light with a shaping opaque front panel and limited light emission

Abstract

Surface light (1), in particular LED panel for mounting in grid ceilings or on concrete ceilings, characterized in that it has a front plate (7) with a defined cutout (8) for limiting the light emission, wherein the front plate (7) is opaque and is positioned on an LED backlight panel (2) so that a surface illumination can be generated.

Description

Technical area

[0001] The invention relates to a panel light, in particular an LED panel for installation in grid ceilings or on concrete ceilings, with a light emission limitation provided by a shaped front panel. The invention particularly relates to an LED light with backlight technology for targeted lighting in interior areas. State of the art

[0002] Well-known are so-called sidelight or edge-lit panels, in which LED strips feed into a light guide plate (LGP) from the side. The LGP guides the light into the surface through total internal reflection and emits it forward in defined patterns. This technology requires precisely structured light guide plates and results in even light distribution across the entire surface.

[0003] In contrast, so-called backlight LED panels have become established, in which the LEDs are arranged on the back, directly behind the illuminated surface. These panels contain diffuser films for even light distribution and create a homogeneous illuminated surface. However, such panels are usually designed as completely flat radiating units.

[0004] A disadvantage of conventional LED panels is that the light-emitting surface is not shaped, thus preventing customized lighting control or design. Targeted, shape-defined light emission is not possible with conventional backlight panels. Object of the invention

[0005] The invention is based on the object of providing a surface light which, based on a backlight panel, enables a selection of the light output, in particular for generating a defined light image while remaining simple to manufacture and install in common ceiling structures. Solution to the task

[0006] This object is achieved by a surface light having the features of claim 1.

[0007] According to the invention, a surface light is provided which is designed in particular as an LED panel for installation in grid ceilings or on concrete ceilings, wherein the light has an opaque front panel with a defined cutout for limiting the light emission and this front panel is positioned on an LED backlight panel which generates a surface illumination.

[0008] This enables the targeted light to be directed onto a defined area in a particularly effective manner without having to change the LED panel itself.

[0009] Preferably, the cutout in the front panel is round, oval, polygonal, or any other freely formed shape to create different light patterns or images. It is also advantageous for the front panel to be made of aluminum, steel, or opaque plastic, ensuring mechanical stability and light shielding.

[0010] Advantageously, the LED panel is constructed as a backlight module with the following layers: an LED unit on a rear carrier board, a reflector layer behind the LEDs, one or more diffuser layers in front of the LEDs and a light-emitting front surface with scattering properties.

[0011] It is also advantageous according to an embodiment of the invention that the carrier board is made of heat-conducting aluminum in order to enable improved heat dissipation of the LED assembly.

[0012] Preferably, the surface light is designed in such a way that it is suitable both for insertion into grid ceiling systems and for mounting on solid ceilings, for example by means of a corresponding frame or bracket.

[0013] Another particularly advantageous feature is that the front panel is designed to be interchangeable, so that different light emission shapes or patterns can be achieved through simple mechanical adjustment.

[0014] Advantageously, there is a distance between the front panel and the light-emitting surface, which provides additional scattering and thus a softer light distribution.

[0015] According to a further preferred embodiment of the invention, the front panel can be detachably attached to the panel by plugging, snapping or magnetic fastening.

[0016] The invention further relates to the use of the surface light as a lighting element in modular ceiling structures, in particular for targeted lighting design in interior spaces.

[0017] The surface light includes: • an LED panel with backlight design, • an opaque front panel positioned on top with a cutout through which light escapes.

[0018] The cutout can be round, oval, polygonal, or freely shaped. The front panel is preferably made of aluminum, steel, or opaque plastic. The cutout acts as a light window through which light emerges in the desired shape. The front panel thus limits the light emission to the desired area and creates a shape-defined light pattern.

[0019] The invention thus allows for easy individualization of light images by exchanging or varying the front panel without having to change the light panel itself. Advantageous embodiments

[0020] In preferred designs, the front panel is detachably mounted on the LED panel, e.g., by plug-in, snap-in, or magnetic connection. The distance between the front panel and the light surface can be selected to ensure a gentle dispersion of the light edges.

[0021] The LED panel can be embedded in a grid ceiling (e.g., a traditional ceiling) or mounted on a solid ceiling (e.g., a concrete ceiling) using a mounting frame. The LED carrier board is preferably made of heat-conducting aluminum for improved heat dissipation.

[0022] By choosing different front panels, light outputs in different shapes or arrangements can be created without having to change the actual light source.

[0023] Further advantageous embodiments result from the further subclaims or their possible subcombinations. Description of the drawing

[0024] The invention is further explained below with reference to the drawings. The schematic representation shows in detail: Fig. 1 a schematic representation of a surface light according to the invention, Fig. 2 a schematic side view of the panel light, and Fig. 3 a front view of the circular front panel in the example.

[0025] The same reference numbers in the figures indicate the same or similarly acting elements.

[0026] Fig. Figure 1 shows a schematic exploded view of a panel light according to the invention in an isometric view. The panel light (1) comprises a housing frame (3) that serves to accommodate the additional components and can be used either for insertion into a grid ceiling or for mounting on a solid ceiling (e.g., using a mounting frame).

[0027] A carrier board (4) with a plurality of LEDs (5) is arranged on the housing frame (3), which emit light upwards in a flat manner (backlight configuration). A reflector layer (not separately marked in the illustration) can be provided behind the carrier board (4), which reduces downward light losses.

[0028] Above this there are one or more diffuser layers (6), which evenly distribute the point-shaped light of the LEDs and ensure a homogeneous light emission surface.

[0029] The top light-emitting layer is a translucent front surface (6), typically made of opal plastic or acrylic, which emits the light softly.

[0030] Above this is an opaque front panel (7) featuring a round cutout (not separately numbered). This cutout serves as a light window through which light can escape. The front panel (7) can be made of aluminum, steel, or opaque plastic, for example, and can be optionally attached in a removable or replaceable manner.

[0031] The combination of the diffuser surface (6 or 5) with the opaque front panel (7) above it with light cutout enables a targeted limitation and shaping of the outgoing light.

[0032] The Fig. 2 and Fig. 3 shows a schematic side view of the surface light, showing that in the example shown the panel (2) is curved protruding through the opening of the front panel (7).

[0033] In Fig. 3 shows the front view of the circular opening (8) of the front panel (7) in the example. List of reference symbols 1 panel light 2 LED backlight panels 3 LED module / LED board 4 Reflector layer 5 diffuser foil(s) / diffuser layer 6 Front panel / light exit surface 7 Opaque front panel 8 Light cutout / opening in front panel Light-emitting surface 9 frames for ceiling inlay or surface mounting 10 Carrier board (aluminum)

Claims

[1] Surface-mounted luminaire (1), in particular LED panel for installation in suspended ceilings or on concrete ceilings, characterized by that it has a front panel (7) with a defined cutout (8) to limit the light emission, wherein the front panel (7) is opaque and is positioned on an LED backlight panel (2) so that an area illumination can be produced. [2] Surface lamp (1) according to claim 1, characterized by , that the cutout (8) is round, oval, polygonal or of any other free shape. [3] Surface lamp (1) according to one of claims 1 or 2, characterized by , that the front panel (7) is made of aluminium, steel or opaque plastic. [4] Surface lamp (1) according to one of claims 1 to 3, characterized by , that the LED panel (2) is a backlight panel with the following components: - an LED module (3) on a rear carrier board (10), - a reflector layer (4) behind the LED module (3), - one or more diffuser layers (5) in front of the LED module (3), - an opal or diffusing front panel (6). [5] Surface lamp (1) according to claim 4, characterized by , that the carrier board (10) is made of aluminium and serves for heat dissipation. [6] Surface lamp (1) according to any one of claims 1 to 5, characterized by , that the panel (2) or the surface light (1) is inserted into a grid ceiling (e.g. Odenwald ceiling) or alternatively mounted with a frame (9) to a solid ceiling (e.g. concrete ceiling). [7] Surface lamp (1) according to any one of claims 1 to 6, characterized by , that the front panel (7) is interchangeable to create different light emission shapes or patterns. [8] Surface lamp (1) according to any one of claims 1 to 7, characterized by, that there is a distance between the front panel (7) and the light emission surface (6) which creates a soft light distribution by scattering in a scattered light zone (11). [9] Surface lamp (1) according to any one of claims 1 to 8, characterized by that the front panel (7) is attached to the panel (2), snapped into place or magnetically fixed. [10] Surface lamp (1) according to any one of claims 1 to 8, characterized by , that the panel (2) is curved protruding through the opening of the front panel (7). [11] Use of the surface luminaire (1) according to any one of claims 1 to 10 as a lighting element in modular ceiling structures, in particular in interiors with optically designable lighting guidance.

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