Search

EP-4741709-A1 - HEADLIGHT

EP4741709A1EP 4741709 A1EP4741709 A1EP 4741709A1EP-4741709-A1

Abstract

A headlight (1) comprises 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) at 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.

Inventors

  • van de Groote Poort, Daniel Garcia

Assignees

  • ROXX GmbH

Dates

Publication Date
20260513
Application Date
20250102

Claims (11)

  1. 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.
  2. Headlight (1) according to claim 1, wherein the zoom optics (7) includes at least one optical element (71) that is 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 adjustment 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 output side (13) of the headlight (1).
  6. Headlight (1) according to one of claims 2 to 5, wherein the zoom optics (7) includes several optical elements (71).
  7. Headlight (1) according to claim 6, wherein the multiple optical elements (71) are arranged on a common carrier (75) and are jointly adjustable in their position and/or orientation 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 light source (5).
  9. Headlight (1) according to one of the preceding claims, wherein the light source (5) comprises LEDs (51) and/or light lines (52).
  10. Headlight (1) according to claim 9, wherein several light sources (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).

Description

Field of invention The invention relates to a spotlight for professional lighting technology, e.g. for event lighting. State of the art Spotlights for event technology, such as PAR (Parabolic Aluminized Reflector), floodlights, Fresnel or profile spotlights, and strobes, are known. It is also known to attach elements for generating optical effects to such spotlights, either permanently or detachably. Such elements for generating optical effects are, for example, as described in the... DE 20 2024 104 851 U1 The disclosure concerns filters that feature tintable or frosted glass, the light transmission of which can be changed by applying an electrical voltage. Such so-called smart glass filters can be continuously adjusted to be transparent or opaque by applying an electrical voltage and/or they can be continuously tinted. Although various lighting effects can be created using such optical elements, the flexibility in generating these effects is limited, since changes to the effects during operation can only be achieved by applying or withholding voltage. Alternatively, and this is cumbersome, the filter must be replaced with a different type of filter or optical element during operation. Object of the invention Based on this, one object of the invention is to provide a headlight with which the effects of a Smart Glass filter on a headlight can be varied. can be exploited and greater variability of lighting effects can be achieved without changing the filters during operation. Description of the invention This problem is solved with a headlight having the features of claim 1. Preferred embodiments are specified in the dependent claims. The invention is based on the idea of combining an optical filter, formed from a tintable glazing, a so-called smart glass, with the zoom optics of a headlight. The stepless adjustability of the smart glass, in combination with the stepless adjustability of the zoom optics, allows for a multitude of effects to be achieved with the light emitted by the headlight, thus multiplying the possible combinations and effects compared to conventional headlights. Because both the zoom optics and the smart glass are adjustable during operation, these effects can be flexibly applied and achieved at any time without the need to replace filter elements or other optical components. The Smart Glass Filter is either removable or permanently attached to the headlight. If the filter is removable, it can be replaced with another filter, another Smart Glass Filter, or another optical element as needed, providing even greater flexibility in the lighting effects achievable with the headlight and thus expanding its usability. A preferred embodiment for the detachable attachment of a smart glass filter to a headlight is described in the DE 20 2024 104 851 U1 described, the relevant teachings of which are included here by reference. In particular, for a detachable filter, to ensure correct alignment, at least four contacts are preferably provided on a frame of the filter to which the tintable glazing is attached. An electrical voltage is applied to at least two of these contacts to change the light transmission of the tintable glazing, and at least two other contacts ensure that the filter is correctly mounted on the headlight, which is equipped with corresponding contacts. The contacts can be arranged side by side in a row, or alternatively, at least two of the at least four contacts can be arranged in pairs side by side in a row. In a preferred embodiment, the zoom optics include at least one optical element whose position and/or orientation is adjustable. This optical element is arranged between the light sources of the headlight and the light-emitting side or surface of the headlight. In a further preferred embodiment, the optical element is translationally displaceable in a direction that is substantially perpendicular to the light-emitting side or surface of the headlight, so that it can be positioned closer to or further away from the light sources and the light-emitting side. This allows for continuously adjustable lighting effects. For example, the optical element can contain one or more lenses. The adjustment of at least one optical element can be achieved, for example, via a motor that moves the optical element translationally. Alternatively, the optical element could also be rotated or tilted. A motor allows for simple and reliable movement and adjustment of the optical element. Preferably, the zoom optics contain several optical elements, for example, optical elements assigned to each individual light source of the headlight, so that light which light exiting from one or a group of light sources passes through one of the optical elements towards the light-exit side of the headlight. If multiple optical elements are provided, they are preferably arranged on a common carrier so that the position and/or orientation of the optical elements can be adjusted together by moving the carrier. This me