headlights

Abstract

Headlights (1) with a housing (11), wherein the housing (11) defines a cavity (12) and a light exit side (13) of the headlight (1); a light source (5) provided in the cavity (12) of the housing (11); a zoom optic (7) provided in the cavity (12) of the housing (11); and a filter (8) arranged on the housing (11) on the light exit side (13), wherein the filter (8) has a tintable glazing (smart glass) whose light transmission can be changed by applying an electrical voltage.

Description

Field of the invention

[0001] The invention relates to a spotlight for professional lighting technology, e.g. for event lighting. State of the art

[0002] Spotlights for event technology, such as PAR (Parabolic Aluminized Reflector), floodlights, Fresnel or profile spotlights, and stroboscopes, are well known. Furthermore, it is known to permanently mount elements for creating optical effects on such spotlights or to attach them detachably from the spotlight. Such elements for creating optical effects include, for example, filters, as disclosed in DE 20 2024 104 851 U1, which have tintable or frosted glass whose light transmittance can be changed by applying an electrical voltage. These so-called smart glass filters can be continuously adjusted to be translucent or opaque by applying an electrical voltage, and / or they can be continuously colored.

[0003] Although such optical effect elements can create various lighting effects, the flexibility in creating the lighting effects is limited, as changes to the effects can only be achieved during operation by applying or not applying voltage. Alternatively, the filter must be replaced with a different type of filter or optical element during operation, which is laborious. Object of the invention

[0004] Based on this, it is an object of the invention to provide a headlight with which the effects of a smart glass filter on a headlight can be exploited in a variety of ways and a greater variability of the lighting effects can be achieved without replacing the filters during operation. Description of the invention

[0005] This object is achieved with a headlight having the features of claim 1. Preferred embodiments are specified in the dependent claims.

[0006] The invention is based on the idea of ​​combining an optical filter made of tintable glazing, a so-called smart glass, with the zoom optics of a headlight. The infinitely adjustable nature of the smart glass combined with the infinitely adjustable nature of the zoom optics allows a multitude of effects to be achieved with the light emitted by the headlight, multiplying the possible combinations and thus the effects compared to conventional headlights. Because both the zoom optics and the smart glass are adjustable during operation, these effects can be flexibly used and achieved at any time without having to replace filter elements or other optical elements.

[0007] The Smart Glass filter is attached to the headlight either detachably or permanently. If the filter is preferably detachably attached to the headlight, the Smart Glass filter can be exchanged for a different filter or another optical element as needed, providing even greater flexibility in the lighting effects achievable with the headlight and thus enabling the headlight to be used in a variety of ways.

[0008] A preferred embodiment for the detachable attachment of a smart glass filter to a headlight is described in DE 20 2024 104 851 U1, the teachings of which are incorporated herein by reference.

[0009] In particular, in the case of a removable filter, to ensure correctly aligned installation of the filter, at least four contacts are preferably provided on a frame of the filter to which the tintable glazing is fixed. An electrical voltage is applied via at least two of these contacts to change the light transmittance of the tintable glazing, and at least two other contacts ensure correct installation of the filter on the headlight, which is provided with corresponding contacts. The contacts can be arranged side by side in series, but alternatively, at least two of the at least four contacts can be arranged in pairs next to each other in series.

[0010] According to a preferred embodiment, the zoom optics contains at least one optical element adjustable in its position and / or orientation. The at least one optical element is arranged between the illuminants of the headlight and the light exit side or surface of the headlight. According to a further preferred embodiment, the at least one optical element is translationally displaceable in a direction substantially perpendicular to the light exit side or surface of the headlight, so that it can be arranged closer to or further away from the illuminants and the light exit side. This allows continuously adjustable lighting effects to be achieved.

[0011] For example, the optical element may contain one or more lenses.

[0012] The adjustment of at least one optical element can be achieved, for example, via an adjustment motor that translates the optical element, for example. Alternatively, it would also be conceivable to rotate or tilt the optical element. With the help of an adjustment motor, simple and reliable movement and adjustment of the optical element can be achieved.

[0013] Preferably, the zoom optics contains a plurality of optical elements, for example optical elements each assigned to individual light sources of the headlight, so that light emerging from one or a group of light sources passes through one of the optical elements in the direction of the light exit side of the headlight.

[0014] If multiple optical elements are provided, they are preferably arranged on a common carrier so that the optical elements can be adjusted jointly in their position and / or orientation by adjusting the carrier. This means that only one common adjustment motor is required for the entire zoom optics, reducing the complexity of the setup.

[0015] Preferably, each of the optical elements is assigned at least one light guide as a light source. This allows the light emitted by the light sources to be directed into the optical element in a bundled manner.

[0016] The light sources can be any type of light source or combinations of different light sources, e.g. LEDs and / or light pipes.

[0017] To reduce complexity, the multiple light sources are preferably arranged on a common printed circuit board (PCB). Short description of the characters

[0018] The invention is described below by way of example using preferred embodiments with reference to the accompanying figures. They show: Fig. 1 sectional view of a headlight with a filter with a tintable glazing (smart glass) and a zoom optic according to an embodiment, wherein the zoom optic is in a first position; and Fig. 2 a sectional view of the headlight Fig. 1, with the zoom lens in a second position. Description of preferred embodiments

[0019] Fig. Figure 1 shows a sectional view of a headlight 1. The headlight 1 includes a housing 11 defining a cavity 12. The housing 11 may, for example, be substantially cuboid-shaped or alternatively cylindrical or have any other suitable shape.

[0020] Illuminants 5 are provided in the cavity 12 of the housing 11 of the headlight 1. In the illustrated embodiment, the illuminants 5 are arranged on a printed circuit board (PCB) 55. Several groups of LEDs 51 and light guides 52 are provided as illuminants 5, which, during operation, emit light toward a light exit side 13 of the headlight 1.

[0021] A smart glass filter 8 is provided on the light exit side 13 of the headlight 1. The smart glass filter 8 can be permanently connected to the housing of the headlight 1 or detachably attached to it, thus being interchangeable with another smart glass filter or another type of optical element. The light transmission properties of the smart glass, such as color, transparency, frosting effect, etc., depending on the type of smart glass used, can be changed and adjusted by applying an electrical voltage to the smart glass.

[0022] Furthermore, it is possible to provide additional optical elements, such as additional filters, on the headlight 1.

[0023] Before exiting the cavity 12 of the headlight 1 and passing through the smart glass filter 8, the light emitted by the lamps 5 penetrates a zoom lens 7, which is also arranged in the cavity 12 of the headlight. The zoom lens 7 has a plurality of lenses 71, which are arranged on or at a common carrier 75. One lens or a plurality of lenses can be provided, optionally also integrally formed, i.e. from a single piece of material. Since the lenses 71 are arranged on a common carrier 75 in the illustrated embodiment, they can be moved together via a common adjustment motor 72 with a corresponding adjustment mechanism.

[0024] In the Fig. 1 and Fig. 2, the carrier 75 is translationally displaceable, ie essentially along the light exit direction from the headlight 1, by actuating the adjusting motor 72. In the embodiment shown, the carrier 75 and with it the lenses 71 attached thereto can be moved from a position close to the printed circuit board 55 or circuit board and thus the lighting means 5 (the position shown in Fig. 1) into a Fig. 2 shown the printed circuit board 55 or circuit board and thus the lighting means 5 far position, in which the lenses 71 are close to the Smart Glass filter 8.

[0025] By varying the position of the lenses 71 relative to the light sources, a variety of lighting effects can be achieved with a specific light transmission property of the Smart Glass Filter 8. However, since the light transmission properties of the Smart Glass Filter 8 can also be changed by applying voltage to the latter, this results in even greater variety and flexibility in setting lighting effects. List of reference symbols 1 headlight 11 housings 12 Cavity 13 Light exit side 5 bulbs 51 LED 52 Light guide 55 printed circuit board (PCB) 7 zoom optics 71 optical element (lens) 72 Adjustment motor 75 carriers 8 filters (smart glass) QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2024 104 851 U1 [0002, 0008]

Claims

[1] Headlight (1) with a housing (11), wherein the housing (11) defines a cavity (12) and a light exit side (13) of the headlight (1); a lighting means (5) provided in the cavity (12) of the housing (11); a zoom lens (7) provided in the cavity (12) of the housing (11); and a filter (8) arranged on the housing (11) on the light exit side (13), wherein the filter (8) has a tintable glazing (smart glass) whose light transmittance can be changed by applying an electrical voltage. [2] Headlight (1) according to claim 1, wherein the zoom optics (7) contains at least one optical element (71) adjustable in its position and / or orientation. [3] Headlight (1) according to claim 2, wherein the optical element (71) includes a lens. [4] Headlight (1) according to claim 2 or 3, wherein the zoom optics (7) includes an adjusting motor (72) adapted to effect a change in position and / or orientation of the optical element (71). [5] Headlight (1) according to one of claims 2 to 4, wherein the optical element (71) is displaceable in a direction perpendicular to the light exit side (13) of the headlight (1). [6] Headlight (1) according to one of claims 2 to 5, wherein the zoom optics (7) contains a plurality of optical elements (71). [7] Headlight (1) according to claim 6, wherein the plurality of optical elements (71) are arranged on a common carrier (75) and are jointly adjustable in their position and / or location by adjusting the carrier (75). [8] Headlight (1) according to claim 6 or 7, wherein each of the optical elements (71) is assigned at least one light guide (52) as a lighting means (5). [9] Headlight (1) according to one of the preceding claims, wherein the illuminant (5) contains LEDs (51) and / or light guides (52). [10] Headlight (1) according to claim 9, wherein a plurality of lighting means (5) are provided which are arranged on a common printed circuit board (PCB) (55). [11] Headlight (1) according to one of the preceding claims, wherein the filter (8) is removable from the housing (11).

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