AT518334B1 - MATRIX LIGHTING MODULE - Google Patents

Abstract

Disclosed is a matrix illumination module having a plurality of light emitting diodes (LEDs) arranged in series or in a matrix. The LEDs can be switched off and on independently of each other. Subsequent to the LEDs, an optical element is provided. Between the optical element and the LEDs are apertures (38) are provided which substantially separate the beam paths of the LEDs from each other.

Description

Description: The invention relates to a matrix lighting module or a matrix lighting module, in particular for a vehicle, in accordance with the preamble of claim 1 and WO 2014/012 128 A1.

This module has the disadvantage that no clear assignment of the individual LEDs to certain sections of the primary optics is possible, and that light emitted by other LEDs is passed on from an unwanted section of the primary optics, which leads to undesired lighting images.

Other publications such as WO 2014/094 017 A2 disclose the design of the primary optics in the form of many cavities which are designed as reflectors or, as in EP 2 042 801 A1, convex projections.

The vehicle can be an aircraft or a waterborne vehicle or a landborne vehicle. The land vehicle can be a motor vehicle. The use of the module in a vehicle headlight or in a vehicle lamp in a truck or passenger car is particularly preferred.

[0005] A light-emitting diode (LED) or light-emitting diode can be in the form of at least one individually packaged LED or in the form of at least one LED chip which has one or more light-emitting diodes. Several LED chips can be mounted on a common substrate ("submount") and form an LED. The at least one LED can be equipped with at least one of its own and / or common optics for beam guidance, for example with at least one Fresnel lens or a collimator. Instead of or in addition to inorganic LEDs, for example based on InGaN or AlInGaP, organic LEDs (OLEDs, e.g. polymer OLEDs) can generally also be used. The LED chips can be directly emitting or have an upstream phosphor. Alternatively, the LED can be a laser diode or a laser diode arrangement. The emission wavelengths of the LEDs can be in the ultraviolet, visible or infrared spectra range. The LED chips preferably emit white light in the standardized ECE white field of the automotive industry.

It is known to form an adaptive driving light or an adaptive driving beam (ADB) with a matrix lighting module. In particular, the module can be used to implement a glare-free high beam for automotive applications. For this purpose, one or more LEDs are switched off on the module in the case of oncoming traffic in order not to blind a driver of the oncoming vehicle. A glare-free high beam can thus be formed with the module. The disadvantage here is that it is technically difficult to implement in such a module to avoid glare to the vehicle driver from the oncoming vehicle within the framework of legal requirements.

The object of the present invention is to provide a matrix lighting module with which an adaptive light is made possible in a device-technically simple manner, in which, for example, when used as high beam, glare from oncoming traffic is prevented or reduced or within the scope of Legislative requirements.

This object is achieved by a matrix lighting module according to the features of claim 1.

Particularly advantageous refinements can be found in the dependent claims.

According to the invention, a matrix lighting module or a module or a Compact ADB (Adaptive Driving Beam) module has a plurality of light-emitting diodes (LEDs). These can be arranged in one or more rows. Furthermore, at least one primary optics or primary lens connected downstream of the LEDs is preferably provided. This is designed, for example, in one part or in several parts and can be used to collect the light emitted by the LEDs and to form a specific photo. Advantageously, at least one of the LEDs or several of the LEDs or all of the LEDs can be controlled independently of the other LEDs. At least one diaphragm is advantageously arranged between an LED, which can be controlled independently of the other LEDs, and an adjacent LED.

[0011] This solution has the advantage that when the LED which is associated with a diaphragm is switched off, no light or at least less light from the neighboring LED is coupled into the light path due to the diaphragm. It has been found in the prior art that, when LEDs are switched off, light is coupled from the non-switched-off LEDs into the primary lens or into the section of the primary lens of the switched-off LED or LEDs, which can lead to glare, as explained at the beginning. In other words, light that is coupled from an LED into the neighboring element of the primary optics is responsible for a scattered light that leads to limit values with regard to glare being exceeded. This ensures in the module according to the invention that a maximum intensity prescribed by law is not exceeded in the deactivated pixels, ie in the light path of the deactivated LEDs. In order to maintain maximum intensities when using the module, one or more shutters are advantageously arranged between the individual LEDs.

When independently controlling one or more LEDs or pixels, switching on and off and / or dimming should be possible.

In a further embodiment of the invention, the at least one diaphragm is arranged and / or configured such that it at least partially reflects light radiation, the light radiation being emitted by the LED adjacent to it and being reflected on a coupling surface of the primary optics. Alternatively or additionally, the diaphragm is arranged and / or configured in such a way that light radiation emitted by the LED adjacent to it is prevented from entering a beam path of the other LED adjacent to it. In other words, the aperture can have two functions. On the one hand, it can keep radiation reflected by the primary lens egg coupling surface within the corresponding pixel, and on the other hand it can block direct radiation that would reach a neighboring coupling surface. As a result, the requirements of the legislator can be met in a simple manner in terms of device technology.

In a further embodiment of the invention, the LEDs are arranged on a plate or a board. The primary optics can then be spaced apart or approximately parallel to the plate. The primary optics and the plate are preferably connected via a module housing and / or attached to a module housing. The at least one diaphragm is then preferably arranged in the module housing between the primary optics and the plate. This leads to an extremely compact, simple and robust design of the module. The diaphragm or diaphragms can thus be inserted between the LED board and the primary optics.

Preferably, the screen or the screens are each approximately lamellar or plate-shaped.

To separate a plurality of LEDs arranged in a row, a plurality of diaphragms is preferably arranged, which can extend approximately at a parallel distance from one another. Furthermore, the diaphragm or the diaphragms can extend approximately perpendicular to the plate and / or approximately parallel to the beam axis of a respective LED.

In a further embodiment of the invention, the diaphragm or the diaphragms are spaced from the primary optics and / or from the plate. As a result, the module can be used in a simple manner at different temperatures or application temperatures, which means that when the volume of the plate and / or the primary optics changes, there is preferably no mechanical contact with the diaphragm. In particular, if the primary optics are designed as silicone optics or silicone lenses, comparatively large expansions of the primary optics can take place when the temperature rises.

Further preferably, a shape of the diaphragm or a respective diaphragm is adapted to a contour of the plate surface of the plate facing the diaphragm and / or the coupling surface of the primary optics facing the diaphragm, which effectively enables the functions mentioned above of the diaphragm. In particular, a diaphragm side of a respective diaphragm facing the primary optics can be adapted to a contour of an approximately opposite section of the coupling surface. Alternatively or additionally, a panel side of a respective panel facing the panel can be adapted to a contour of an approximately opposite section of the panel.

In a further embodiment of the invention, it is conceivable that a distance from the diaphragm to the primary optics increases in each case in a transverse direction towards the housing. As a result, a distance between the diaphragm and the primary optics, viewed in a transverse direction of the primary optics, can increase toward the respective edge area.

[0020] The primary optics preferably have a coupling surface, which is designed with a convex projection section in each case toward a respective LED. This can taper towards the respective LED. The diaphragm can then be arranged in the region or the diaphragms can then each be arranged in the region between two projection sections. This makes it possible to dazzle stray light over a large area.

In a further embodiment of the invention, diaphragms can also be arranged in a row in a row of LEDs. In particular, an aperture can be provided between two LEDs. If a plurality of rows of LEDs are provided, it is conceivable to arrange at least one screen between adjacent rows.

[0022] The primary optics are preferably followed by a secondary optics or a secondary lens for imaging the light image in a far field.

The LEDs and the primary optics are arranged in a direction transverse to the row of LEDs between two housing walls of the housing. The diaphragm or diaphragms in turn extend between the housing walls.

The panels are, for example, integrally formed with the housing or each as a separate component to the housing.

[0025] The diaphragm is preferably designed with a scattering and / or absorbing and / or reflecting surface.

The housing is preferably simply designed as a frame. A receptacle for the primary optics into which it is inserted can be provided within the frame. The plate can also be applied and fastened, for example, to an, in particular annular, end face of the frame-shaped housing.

Preferably, a vehicle headlight or a vehicle lamp is provided with the module according to one or more of the preceding aspects.

The invention will be explained in more detail below using an exemplary embodiment.

The figures show: [0030] FIG. 1 in a perspective illustration of part of a matrix lighting module according to an exemplary embodiment, [0031] FIG. 2 in a longitudinal section the module from FIG. 1 together with a primary optics and [0032] 3 shows a cross section of the module from FIG. 1 together with the primary optics.

According to Figure 1, a matrix lighting module 1 has a frame-shaped housing 2, which delimits approximately a rectangular interior 4. An approximately annular, axially introduced inner step 8 is provided from a light exit side 6 of the housing 2, into which an optical element or a primary optic 10, see FIG. 2, can be inserted.

A plurality of LEDs 16 to 34 are arranged in a row at a distance from one another on a plate 12 or a board on an upper side 14 facing the housing 2. According to FIG. 2, the plate 12 rests with its upper side 14 or plate surface against an abutment side 36 of the frame-shaped housing 2 facing away from the light exit side 6 and is connected to it, for example screwed. Laminated diaphragms 38, see FIGS. 1 and 2, are arranged between the LEDs 16 to 34, each extending approximately in the transverse direction to the row with the LEDs 16 to 34. According to FIG. 2, a respective underside or panel side 40 of a respective panel 38 facing the plate 12 is spaced apart from the top side 14. Furthermore, an upper side or diaphragm side 42 of a respective diaphragm 38 facing the primary optics 10 is spaced apart from the primary optics 10.

According to Figure 2, the primary optics 10 has an approximately annular retaining collar 44, via which it is inserted in the stage 8 of the housing 2. A first optics section 46 of the primary optics 10 protrudes from the housing 2. A second optics section 48, on the other hand, projects from the step 8 into the housing 2 towards the plate 12. The primary optics 10 are elongated and extend along the row of LEDs 16 to 34 from FIG. 1.

According to Figure 2, the primary optics 10 has a coupling surface 50 facing the plate 12, which has a convex projection section 52 for each LED 16 to 34. A distance from the plate 12 is then increased between the projection sections 52, the screens 38 then being arranged between the projection sections 52.

According to FIG. 3 it can be seen that the projection section 52 also tapers towards the LED when viewed in cross section. According to FIG. 2, an intermediate space 56 between two projection sections 52 is approximately V-shaped, seen in longitudinal section, the intermediate space 56 tapering in a direction away from the plate 12. Seen in cross section in FIG. 3, the intermediate space 56 has approximately the same shape as the projection section 52, with a distance from the plate 12 being greater.

According to FIG. 3, the diaphragm side 42, seen in cross section, has approximately a contour corresponding to the coupling surface 50 of the primary optics 10 in the area of the intermediate space 56. A distance between the diaphragm side 42 and the coupling surface 50 is approximately constant here in cross section. The underside 36 of the diaphragm 38 is approximately flat and extends approximately at a parallel distance to the plate 12. According to FIG. 2, the diaphragm side 42 of a respective diaphragm 38 is curved and convex, seen in longitudinal section.

What is disclosed is a matrix lighting module with a plurality of light-emitting diodes (LEDs) arranged in a row or in a matrix. The LEDs can be switched on and off independently of each other. An optical element is provided after the LEDs. Apertures are provided between the optical element and the LEDs, which essentially separate the beam paths of the LEDs from one another.

LIST OF REFERENCE NUMBERS

Module 1

Housing 2

Interior 4

Light exit side 6

Level 8

Primary optics 10

Plate 12

Top 14 LED 16 to 34

Appendix page 36

Aperture 38

Aperture side 40

Aperture side 42

Retaining collar 44

Optics section 46

Optics section 48

Coupling surface 50

Protrusion portion 52

Space 56

Claims (8)

claims 1. Matrix lighting module with a plurality of light-emitting diodes (16-34) (LEDs) and with at least one primary optics (10) connected downstream of the LEDs (16-34), at least one of the LEDs (16-34) being independent can be controlled by the other LEDs (16-34) and at least one aperture (38) between an LED (16-34) which can be controlled independently of the other LEDs (16-34) and an adjacent LED (16-34) is arranged, the LEDs (16 - 34) being arranged on a plate (12), the primary optics (10) extending at a distance from the plate (12), the primary optics (10) and the plate (12) via a housing (2) are connected, and wherein the at least one diaphragm (38) is arranged in the housing (2) between the primary optics (10) and the plate (12), characterized in that a coupling surface (50) of the primary optics (10) with a convex projection section (52) each towards a respective LED (16-34), the at least one blend e (38) is arranged at a distance from the primary optics (10) in a region (56) between two convex projection sections (52) of the primary optics (10). 2. Module according to claim 1, wherein a plurality of lamellar or plate-shaped diaphragms (38) are arranged in series to separate the LEDs. 3. Module according to one of the preceding claims, wherein a shape of the panel (38) or panels (38) to a contour of the panel (38) facing plate surface (14) of the plate (12) and / or the panel (38 ) facing coupling surface (50) of the primary optics (10). 4. Module according to one of the preceding claims, wherein the diaphragm (38) or the diaphragms (38) is / are approximately plate-shaped and wherein a diaphragm side (42) of the diaphragm (38) or a respective diaphragm (facing the primary optics (10) 38) is adapted to a contour of an approximately opposite section of the coupling surface (50). 5. Module according to one of the preceding claims, wherein the primary optics (10) is followed by a secondary optics. 6. Module according to one of the preceding claims, wherein the LEDs (16-34) and the primary optics (10) in the transverse direction of the row of the LEDs (16-34) are arranged between two housing walls of the housing (2), between which there are the panel (38) or panels (38) extend. 7. Module according to one of the preceding claims, wherein the diaphragm (38) or the diaphragms (38) is / are fixed in the housing (2) or is designed in one piece with it. 8. Module according to one of the preceding claims, wherein the diaphragm (38) or the diaphragms (38) is / are designed with a scattering and / or absorbing and / or reflecting surface. Two sheets of drawings