EP3388734A1 - Primary lens unit for light module of vehicle headlamp - Google Patents

Abstract

A primary optics unit (2) for a light module of a motor vehicle illumination device is proposed in which the primary optics unit (2) comprises a plurality of light guide sections (4a, 4b,...). Each light guide section (4a, 4b, ...) is assigned a respective light source (6a, 6b, ...). The light guide portions (4a, 4b, ...) are formed to form a desired intermediate light distribution (16) from light of the plurality of light sources (6a, 6b, ...). The respective light guide section (4a, 4b, ...) is delimited by a first coupling surface (8a, 8b, ...) in such a way that the light source (6a, 6b; ...) associated with the light guide section (4a; 4b; ...) light can be coupled into the light guide section (4a; 4b; ...).

Description

The invention relates to a primary optics unit for a light module of a motor vehicle lighting device.

From the EP 2 865 937 A1 For example, an optical fiber is known which comprises a number of light guide plates and a light source associated with the respective light guide plate. The light guide generates a light beam consisting of a number of vertical pixels. Each vertical pixel can be turned off or on.

This solution is disadvantageous in that the light source is positioned in the region of the optical axis, whereby a low beam in the same module is not feasible.

Further, for a homogeneous high beam distribution, the focusing of the light on a point of the exit surface not sufficient near the optical axis. In particular, no homogeneous and no soft vertical outlet is created, resulting in an unaesthetic edge in the radiated light distribution.

It is therefore an object of the invention to increase the efficiency of a primary optics unit, to improve the appearance of the radiated light distribution and to create the possibility of integrating a low-beam module into the associated light module.

The problem underlying the invention is solved by a primary optics unit according to claim 1.

The proposed primary optics unit for a light module of a motor vehicle lighting device comprises a plurality of, in particular, plate-like light guide sections, wherein each light guide section is assigned a respective light source. The light guide sections are formed to form a desired intermediate light distribution of light from the plurality of light sources. The respective light-guiding section is delimited by a first coupling surface in such a way that light generated by the light source assigned to the light-guiding section can be coupled into the light-guiding section. The respective light-guiding section is further limited by a reflection surface arranged opposite the first coupling-in surface such that light originating from the first coupling surface and striking the reflection surface can be deflected in such a way that it can be focused in the region of a coupling-out surface of the light-guiding section. The respective Lichtleitabschnitt is also limited by a second coupling surface so that of the Lichtleitabschnitt associated light source light generated in the Lichtleitabschnitt can be coupled. The respective light guide section is additionally delimited by the coupling-out surface such that the light deflected by the reflection surface and the light incident from the second coupling surface can be coupled out of the light guide section to generate the intermediate light distribution.

The purpose of the plurality of Lichtleitabschnitten is to operate the high beam distribution as a Teilfernlicht or in the form of a matrix function by individual light sources can be switched on and off independently of each other. By providing the second coupling surface, advantageously, a larger luminous flux can be coupled into the light-conducting section and the efficiency is increased. Due to the focusing in the area of the decoupling surface, a high illuminance of 0 ° / 0 °, that is to say in the direction of the forwardly pointing optical axis of the light module, is achieved, thus providing a high visual range for the vehicle driver. In addition, the homogeneity in a vertical outlet of the light distribution can be improved by the superposition of the light beams in the light guide section and the subsequent common coupling. This improvement in homogeneity in the vertical output of the high beam distribution includes a soft vertical spout without a transition visible to the driver. In particular, disturbing color gradients and unaesthetic sharp edges in the radiated high beam distribution can be avoided in this way. Overall, therefore, the radiated high-beam light distribution improves, which allows the vehicle driver an improved view. Consequently, the traffic safety is increased.

An advantageous embodiment is characterized in that the reflection surface in a section, which runs in an imaginary plane of the light guide portion, at least partially follows an ellipse. This makes it possible to focus the light beams in the region of the decoupling surface.

An advantageous embodiment is characterized in that the decoupling surfaces of the plurality of Lichtleitabschnitten form a common outcoupling surface. By the common decoupling surface and a horizontal homogenization of the radiated high beam distribution is achieved.

In an advantageous embodiment, the light-guiding sections open in the direction of the common decoupling surface into a common light-conducting body. Consequently, it is not necessary that the light-guiding sections pass directly into a common decoupling surface, but the light-conducting sections can also abut on the common decoupling surface in order to effect a light transfer.

An advantageous embodiment is characterized in that the common outcoupling surface of the Lichtleitabschnitte a Petzval surface of an associated secondary optical unit follows. Thus, the common decoupling surface serves as an image plane and the imaging accuracy is increased.

An advantageous embodiment is characterized in that the light source is directed with its Hauptabstrahlrichtung on the first coupling surface. this leads to in that a maximum of the luminous flux emitted by the light source for focusing is guided into the area of the exit surface.

An advantageous embodiment is characterized in that the first coupling surface in a section which runs perpendicular to the course of the associated narrow side of the Lichtleitabschnitts, the Lichtleitabschnitt limited in a convex shape. Thus, the incoming light is parallelized already during coupling, which has a positive effect on the efficiency. In addition, color effects that could arise due to dispersion in the area of the secondary optical unit are prevented or at least reduced.

An advantageous embodiment is characterized in that the first coupling surface in a section which extends in an imaginary plane of the plane of the Lichtleitabschnitts, the Lichtleitabschnitt limited in a convex shape. As a result, the coupled light can be better directed in the direction of the reflection surface.

An advantageous embodiment is characterized in that the second coupling surface in a section which runs perpendicular to the course of the associated narrow side of the Lichtleitabschnitts, the Lichtleitabschnitt limited in a concave shape. This concave design allows an expansion of the beam at the coupling to fan out the vertical outlet of the radiated high beam distribution in terms of a horizontal width.

An advantageous embodiment is characterized in that the second coupling surface in a section which runs in the imaginary plane of the plane of the light-guiding section delimits the light-guiding section in convex form. This improves the homogeneity of the vertical outlet of the radiated high beam distribution.

An advantageous embodiment is characterized in that the coupling-out surface of a light-guiding section arranged centrally between further light-guiding sections follows at least in sections a cylinder outer surface in a transverse section. Thus, the illuminance is advantageously 0 ° / 0 °, d. H. 0 ° horizontally and 0 ° vertically in the direction of the optical axis of the light module, increases.

An advantageous embodiment is characterized in that the outcoupling surfaces of the light-guiding sections at least in sections follow a respective cylinder outer surface in a transverse section. Advantageously, this results in a lichtleitabschnittbezogene focusing of the light and the efficiency is increased because less light is lost. Also, in the case of a split-beam operation, undesirable color effects due to dispersion are reduced or avoided.

An advantageous embodiment is characterized in that the decoupling surface in a sagittal section of the optical axis facing the associated secondary optics unit convexly bounds the light guide section. Advantageously, light can thus be broken in the direction of the secondary optical unit and is not lost. Consequently, this causes an increase in efficiency and an increase in the maximum illuminance.

An advantageous embodiment is characterized in that the decoupling surface in the sagittal section facing away from the optical axis of the associated secondary optics unit concavely delimits the light guide section. This has an advantageous effect on the vertical outlet down. In particular, a softer and more homogeneous outlet zone can be created.

An advantageous embodiment is characterized in that the decoupling surface has a wave-shaped profile in the sagittal section. The wave-shaped profile improves the homogeneity of the high-beam distribution emitted by the secondary optical unit, in particular because the light originating from the second coupling surface and the light coming from the reflection surface are mixed more strongly.

An advantageous embodiment is characterized in that the respective light guide section is delimited by a third coupling surface such that light generated by the light guide section associated light can be coupled into the Lichtleitabschnitt, wherein the Lichtleitabschnitt limited by a further, the third coupling surface oppositely arranged reflection surface is, so that from the third coupling surface on the further reflection surface incident light is deflected so that it can be coupled out in the region of another coupling surface of the Lichtleitabschnitts for generating portions of the intermediate light distribution. Advantageously, this makes the vertical outlet to the top homogeneous. Thus, the efficiency of the primary optics unit is further increased.

As a result, space can also be saved as a result.

For example, the maximum height of the vertical outlet in the radiated high beam distribution is increased when the second exit surface is below the light guide associated with the light source.

A further aspect relates to a light module of a motor vehicle lighting device comprising the primary optics unit described above and the secondary optics unit, wherein the secondary optics unit converts the intermediate light distribution radiated by the primary optics unit into a high beam light distribution radiated by the light module.

An advantageous embodiment is characterized in that the light module comprises a further primary optics unit, wherein the secondary optics unit converts a further intermediate light distribution emitted by the further primary optics unit into a low beam distribution radiated by the light module. Thus, a low beam and a matrix high beam is advantageously integrated in a single light module, wherein a common secondary optical unit is used.

• Figur 1 eine Primäroptikeinheit in schematischer Form;
• Figuren 2 und 4 jeweils ein Lichtmodul in einem schematischen Sagittalschnitt;
• Figur 3 das Lichtmodul in einem schematischen Transversalschnitt;
• Figuren 5 und 6 jeweils eine schematische Schnittansicht einer ersten Einkoppelfläche;
• Figuren 7 und 8 jeweils eine schematische Schnittansicht einer zweiten Einkoppelfläche;
• Figur 9 einen Einkoppelbereich in einem schematischen Sagittalschnitt;
• Figuren 10, 11 und 12 jeweils eine Auskoppelfläche in einem schematischen Transversalschnitt;
• Figuren 13, 14, 15 und 16 jeweils die Auskoppelfläche in einem schematischen Sagittalschnitt; und
• Figur 17 eine Kraftfahrzeugbeleuchtungseinrichtung in schematischer Form.

Further advantages and features of the invention will become apparent from the following described embodiments of the drawing. In the drawing show:

• FIG. 1 a primary optics unit in schematic form;
• Figures 2 and 4 one light module each in a schematic sagittal section;
• FIG. 3 the light module in a schematic transverse section;
• FIGS. 5 and 6 in each case a schematic sectional view of a first coupling surface;
• FIGS. 7 and 8 in each case a schematic sectional view of a second coupling surface;
• FIG. 9 a coupling region in a schematic sagittal section;
• FIGS. 10, 11 and 12 in each case a decoupling surface in a schematic transverse section;
• FIGS. 13, 14, 15 and 16 in each case the decoupling surface in a schematic sagittal section; and
• FIG. 17 a motor vehicle lighting device in a schematic form.

FIG. 1 shows in schematic form a primary optics unit 2, which comprises a number of Lichtleitabschnitten 4 a and 4 b. The first light-guiding section 4a is assigned a light source 6a. The second light guide 4b is associated with a second light source 6b. The Lichtleitabschnitte 4a, 4b are each plate-shaped, wherein the respective Lichtleitabschnitt 4a, 4b spans an imaginary respective plate plane, which are in the present schematic representation in the drawing plane or approximately parallel thereto. The light guide sections 4a and 4b are each delimited by two lateral light guide surfaces extending essentially parallel to one another. Dashed lines are drawn in the FIG. 1 Narrow sides of the Lichtleitabschnitts 4a, which represent further narrow-side Lichtleitflächen. The Lichtleitabschnitte 4a, 4b, .. are, as explained below, preferably fanned out to one another, that is arranged at an angle to each other.

Advantageously, by providing individual segments in the form of the light-guiding sections 4a, 4b, a high-beam light can be operated as a partial high-beam, wherein light is radiated only into a subset of the existing optical-fiber sections 4a, 4b.

The light generated by the light source 6a strikes a first coupling surface 8a of the Lichtleitabschnitts 4a and is at least partially coupled into the Lichtleitabschnitt 4a. The light thus coupled into the light guide section 4a strikes a reflection surface 10a, which deflects the light under total reflection so that the deflected light can be focused in the region of a decoupling surface 12a.

Light generated by the light source 6a strikes a second coupling surface 14a of the light guide section 4a and is coupled into the light guide section 4a. The light coupled in via the second coupling-in surface 14a is conducted in the light-guiding section 4a directly to the coupling-out surface 10a. By this direct supply line is meant that the light coupled in via the second coupling-in surface 14a is not conducted via the reflection surface 10a to the coupling-out surface 12a.

The light incident directly from the second coupling surface 14a on the decoupling surface 12a and the light incident on the decoupling surface 12a from the reflecting surface 10a is decoupled via the decoupling surface 12a in such a way that together with the one above the decoupling surface 12a corresponding decoupling surface 12b of the further Lichtleitabschnitts 4b a common intermediate light distribution 16 is emitted from the primary optics unit 2.

In FIG. 2 a light module 105 is shown in a schematic sagittal section, which comprises the primary optics unit 2. In this description, a sagittal section is understood to mean any section which runs parallel to the illustrated xy plane. The imaginary respective plate plane is located in particular centrally within the respective light guide section 4a, 4b. Furthermore, the imaginary plate plane is equidistant from the limiting sides. For reasons of clarity, only the light guide section 4a and the associated light source 6a are shown. The rays coming from the reflection surface 10a are focused in a focus region 22 which is arranged in the vicinity or at the decoupling surface 12a.

The intermediate light distribution 16 generated by the number of light guide sections 4 strikes a secondary optical unit 18, which in the present case consists of two plano-convex lenses 18a and 18b, in order to radiate a high beam distribution 20 from the light module 105. Of course, the secondary optics unit 18 may also be a biconvex lens or a plano-convex lens. Furthermore, a further primary optical unit 24 is shown, which can emit a further intermediate light distribution 26 in the direction of the secondary optical unit 18. The further intermediate light distribution 26 is converted by the secondary optical unit 18 into a low-beam light distribution 28 and emitted by the light module 105.

The secondary optical unit 18 is rotationally symmetrical about an optical axis 30. A transverse section xy through the optical axis 30 divides the light module space disposed opposite to the x direction into a first half space 32 oriented opposite to the z direction and a half space 34 oriented in the z direction. In the ventral hemisphere 32 is the primary optics unit 2 for the high beam. The further primary optic unit 24 is located in the dorsal half space 34.

The two primary optics units 2 and 24 are separated from each other by a wall 36. The wall 36 may be designed, for example, in the direction of the primary optical unit 2 as a coated sheet metal in the form of a mirror panel. In one embodiment, the wall 36 bears against the narrow side of the number of light-conducting sections 4 oriented in the z-direction. This also reflects rays on the upper narrow side, which do not fulfill the condition for total reflection.

The reflection surface 10a follows in the section shown at least in sections an ellipse. The reflection surface 10a preferably follows, at least in sections, an ellipsoid of revolution.

The coupling surfaces 8a and 14a adjoin one another and, with the associated light source 6a, delimit a coupling-in space 38a. The light source 6a is designed, for example, as a semiconductor light source component. The emission surface of the light source 6a defines a main emission direction, which is here oriented, for example, in the z-direction. The main emission direction of the light source 6a is not on the second coupling surface 14a, but directed to the first coupling surface 8a.

FIG. 3 shows the light module 105 in a schematic transverse section. For reasons of clarity, the further primary optics unit 24 is not shown. The secondary optics unit 18 defines an imaginary Petzval surface 40, in the region of which the individual outcoupling surfaces 12 of the respective light guide sections 4 run. In particular, the decoupling surfaces 12 form a common decoupling surface 42 which extends through the imaginary Petzval surface 40. Starting from the common decoupling surface 42, the individual light guide sections 4a to 4j are connected in a common light guide body 44. The individual light guide sections 4a to 4j, starting from the Petzval surface 40, are separated from the common light guide body 44. The Petzval surface 40 represents an image plane which is imaged on the road in front of the motor vehicle.

Here, for example, only the light sources 6a, 6b and 6f are not in operation, which is why in the region of the common decoupling surface 42, a gap 46 is formed, for example, not to dazzle oncoming traffic. The secondary optical unit 18 images the gap 46 as a recess in the radiated high-beam distribution 20.

In FIG. 4 an embodiment of the light module 105 is shown in a schematic sagittal section. Here, the narrow side 48, oriented in the z-direction, of the representatively-illustrated light-conducting section 4 a is provided, for example, with the wall 36 which has a reflective design. Thus, the narrow side 48 can also be labeled as a further reflection surface. Between the first coupling surface 8a and the second coupling surface 14a is a third Einkoppelfläche 50a, wherein here, for example, the third coupling surface 50a as an extension of the first coupling surface 8a represents. The first coupling surface 8a thus goes into the third coupling surface 50a. Light coupled in via the third coupling-in surface 50a, which originates from the associated light source 6a, is conducted to the narrow side 48 designed as a further reflection surface. The further reflection surface deflects the light incident from the third coupling surface 50a in such a way that it is directed to a second coupling-out surface 52a. The second outcoupling surface 52a couples the light incident from the further reflection surface such that its light rays intersect in a region 54 in the sagittal sectional plane shown, this region being located outside the light-conducting section 4a. The light coupled out via the second outcoupling surface 52a is part of the intermediate light distribution 16. The light is coupled out of the second outcoupling surface 52a such that a homogeneous vertical outflow of the main beam distribution results in the intermediate light distribution 16 and passes through the secondary optics 18.

In the FIGS. 5 and 6 are embodiments of the first coupling surface 8a in a section which is perpendicular to the course of the associated narrow side of the Lichtleitabschnitts 4a, shown. The cut is in FIG. 5 Parabolic-shaped and in FIG. 6 Circular-shaped, whereby a convex boundary of the Lichtleitabschnitts 4a is given in the region of the first coupling surface 8a.

In the FIGS. 7 and 8 is a section in the region of the second coupling surface 14a shown, wherein the section perpendicular to the course of the associated narrow side of the Lichtleitabschnitts 4a runs. This results in a concave boundary of the light guide section 4a in the region of the second coupling surface 14a.

FIG. 9 shows in enlarged form the coupling region of the Lichtleitabschnitts 4a in a schematic sagittal section. The light source 6a is arranged in such a way that its main emission direction 56 is directed onto the first coupling-in surface 8a, which is convex in the section shown here by way of example. The second coupling-in surface 14a is arranged here, for example, facing away from the main emission direction 56.

The Figures 10-12 each show an embodiment of the common decoupling surface 42 in a schematic transverse section. In FIG. 11 a central convex curvature 58 is provided which is assigned to the centrally arranged light guide section 4a. Of course, in an asymmetrical design for the left and right headlamps other than the centrally arranged Lichtleitabschnitt 4a for light generation by 0 ° / 0 ° be responsible, which is why the aforementioned bulge 58 may also be arranged moved out of the center out. In FIG. 12 each convex curvature 58 is assigned to each light guide 4 such.

The Figures 13-16 each show an embodiment of the common decoupling surface 42 in a schematic sagittal section. In FIG. 14 If the planar configuration of the decoupling surface 42 in the z-direction, ie in the direction of the optical axis 30, in its upper portion in an upper camber 60 via. The upper curvature 60 limits the common light guide body 44 convex.

In FIG. 15 A lower indentation 62 bounds the common light guide body 44 in concave form. In FIG. 16 In addition to the convex curvature 60 and the remote from the optical axis 30 lower indentation 62, an intermediate central portion 64 is provided with a wave-shaped profile. The wave-shaped profile is designed, for example, as a sinusoidal shape, a sawtooth shape or otherwise.

In FIG. 17 a lighting device for motor vehicles is designated in its entirety by the reference numeral 101. The lighting device 101 is formed in the illustrated embodiment as a motor vehicle headlight. The lighting device 101 comprises a housing 102, which is preferably made of plastic. In a light exit direction 103, the headlight housing 102 has a light exit opening, which is closed by a transparent cover 104. The cover 104 is made of colorless plastic or glass. The disk 104 may be formed without optically effective profiles (for example, prisms) as a so-called clear disk. Alternatively, the pane 104 may be provided, at least in regions, with optically active profiles, which in particular cause a scattering of the light passing through.

Inside the headlight housing 102, two light modules 105, 106 are arranged in the illustrated embodiment. In a movement of the light modules 105, 106 about a horizontal axis, ie in the vertical direction, a headlight range control can be realized. Of course, in the headlamp housing 102, more or less than the illustrated two Light modules 105, 106 may be provided. With the proposed light module 105, it is possible, in particular, to reduce the number of light modules integrated in a headlight housing 102 by integrating a plurality of light functions. Thus, in particular the installation space of the headlight is reduced overall, without having to forego a matrix headlight function.

On the outside of the headlight housing 102, a control device 107 is arranged in a control unit housing 108. Of course, the control device 107 may also be arranged at any other point of the illumination device 101. In particular, a separate control unit can be provided for each of the light modules 105, 106, wherein the control units can be an integral part of the light modules 105, 106. Of course, the controller 107 may also be disposed away from the illumination device 101. The control unit 107 is used in particular in combination with a camera unit for controlling and / or regulating the light modules 105, 106 or subcomponents of the light modules 105, 106, such as light sources of the light modules 105, 106, so as the light module 105, 106 in one To operate partial remote light mode. In this partial high beam mode, only a portion of the existing light sources are operated to generate a high beam for generating light. The control of the light modules 105, 106 and the sub-components by the controller 107 via connecting lines 110, the in FIG. 1 are shown only symbolically by a dashed line. Via the lines 110, the light modules 105, 106 are supplied with electrical energy. The lines 110 are through an opening in Headlight housing 102 is guided in the control unit housing 108 and connected there to the circuit of the control unit 107. If a plurality of control devices are provided as an integral part of the light modules 105, 106, the lines 110 and can account for the opening in the headlight housing 102.

Claims (20)

A primary optics unit (2) for a light module (105) of a motor vehicle lighting device (101), - wherein the primary optics unit (2) comprises a plurality of light guide sections (4a, 4b, ...), wherein each light guide section (4a, 4b, ...) is assigned a respective light source (6a, 6b, ...), - wherein the Lichtleitabschnitte (4a, 4b, ...) for forming a desired intermediate light distribution (16) of light from the plurality of light sources (6a, 6b, ...) are formed, - The respective Lichtleitabschnitt (4a, 4b, ...) is so limited by a first coupling surface (8a, 8b, ...), so that from the light guide (4a, 4b, ...) associated light source (6a; 6b; ...) through the first coupling surface (8a; 8b; ...) can be coupled into the light guide section (4a; 4b; ...), wherein the respective light guide section (4a, 4b, ...) is delimited by a reflection surface (10a, 10b, ...) which is arranged opposite one of the first coupling surface (8a, 8b; Coupling light (8a, 8b, ...) coming and on the reflection surface (10a, 10b, ...) incident light is deflected so that it is focusable in the region of a decoupling surface (12a, 12b, ...), wherein the respective light guide section (4a, 4b, ...) is delimited by a second coupling surface (14a, 14b, ...), such that light source (6a, 6b) associated with the light guide section (4a, 4b; 6b, ...) through the second coupling surface (14a, 14b, ...) can be coupled into the light guide section (4a, 4b, ...), and - Wherein the respective Lichtleitabschnitt (4a, 4b, ...) by the decoupling surface (12a, 12b, ...) is limited so that the of the reflection surface (10a, 10b, ...) deflected light and that of the light for the generation of the intermediate light distribution (16) from the light guide section (4a, 4b, ...) can be coupled out. The primary optics unit (2) according to claim 1, wherein the respective light guide section (4a; 4b; ...) is delimited by the second coupling surface (14a; 14b; ...) and the decoupling surface (12a; 12b; ...) in that the light coupled in via the second coupling-in surface (14a) is conducted in the light-conducting section (4a) directly to the coupling-out surface (10a). The primary optics unit (2) according to claim 1 or 2, wherein the light guide portions (4a; 4b; ...) are plate-shaped. The primary optics unit (2) according to any one of the preceding claims, wherein the reflection surface (10a; 10b; ...) in a section which is in an imaginary plane of the plate the Lichtleitabschnitts (4a, 4b, ...) runs, at least partially follows an ellipse. The primary optics unit (2) according to any one of the preceding claims, wherein the decoupling surfaces (12a, 12b, ...) of the plurality of Lichtleitabschnitten (4a, 4b, ...) form a common outcoupling surface (42). The primary optics unit (2) according to any one of the preceding claims, wherein the Lichtleitabschnitte (4a, 4b, ...) in the direction of the common outcoupling surface (42) in a common light guide body (44) open. The primary optics unit (2) according to claim 5 or 6, wherein the common outcoupling surface (42) of the Lichtleitabschnitte (4a, 4b, ...) of a Petzval surface (40) of an associated secondary optical unit (18) follows. The primary optics unit (2) according to one of the preceding claims, wherein the respective light source (6a; 6b; ...) is directed with its main emission direction (56) onto the first coupling surface (8a; 8b; ...). The primary optics unit (2) according to any one of the preceding claims, wherein the respective first coupling surface (8a; 8b; ...) in a section which is perpendicular to the course of the associated narrow side of the Lichtleitabschnitts (4a, 4b; Lichtleitabschnitt (4a, 4b, ...) delimited by a convex shape. The primary optics unit (2) according to any one of the preceding claims, wherein the respective first coupling surface (8a; 8b; ...) in a section which runs in an imaginary plane of the light guide portion (4a; 4b; ...), the convex shape Lichtleitabschnitt (4a; 4b; ...) limited. The primary optics unit (2) according to any one of the preceding claims, wherein the respective second coupling surface (14a; 14b; ...) in a section which is perpendicular to the course of the associated narrow side of the Lichtleitabschnitts (4a, 4b; Lichtleitabschnitt (4a, 4b, ...) limited with concave shape. The primary optics unit (2) according to one of the preceding claims, wherein the respective second coupling surface (14a; 14b; ...) in a section which runs in the imaginary plane of the light-conducting section (14a; 14b; 14a, 14b; ...) is bounded in a convex shape. The primary optics unit (2) according to one of the preceding claims, wherein the outcoupling surface (42; 12a) of a light guide section (4a) arranged centrally between further light guide sections (4b, ..., 4f, ...) is at least sectionally sectioned in a transverse section (xy) a cylinder outer surface follows. The primary optics unit (2) according to any one of claims 1 to 11, wherein the decoupling surfaces (42; 12a, 12b, ...) of the light guide sections (4a, 4b, ...) follow in a transverse section at least in sections a respective cylinder outer surface. The primary optics unit (2) according to any one of the preceding claims, wherein the decoupling surface (42, 12a, 12b, ...) in a Sagittalschnitt the optical axis (30) of the associated secondary optical unit (18) facing the Lichtleitabschnitt (4a, 4b, .. .) Convex limited. The primary optics unit (2) according to one of the preceding claims, wherein the decoupling surface (42, 12a, 12b, ...) faces away from the optical axis (30) of the associated secondary optics unit (18) in the sagittal section, the light guide section (4a; 4b; ..) concave. The primary optics unit (2) according to any one of the preceding claims, wherein the decoupling surface (42, 12a, 12b, ...) in the sagittal section has a wave-shaped profile. The primary optics unit (2) according to one of the preceding claims, wherein the respective light guide section (4a; 4b; ...) is delimited by a third coupling surface (50a; 50b; ...) such that the light guide section (4a; 4b ...) coupled light source (6a; 6b; ...) in the Lichtleitabschnitt (4a, 4b, ...) is coupled, wherein the respective Lichtleitabschnitt (4a, 4b, ...) by another, The third coupling surface (50a, 50b, ...) arranged opposite reflection surface (48a, 48b, ...) is limited so that from the third coupling surface (50a, 50b, ...) coming on the further reflection surface (48a ... 48b; ...) light is deflectable so that it in the region of another coupling-out surface (52a, 52b, ...) of the Lichtleitabschnitts (4a, 4b, ...) for generating portions of the intermediate light distribution (16) can be decoupled. A light module (105) of a motor vehicle illumination device (101) comprising the primary optics unit (2) according to one of the preceding claims and a secondary optics unit (18), wherein the secondary optics unit (18) transmits the intermediate light distribution (16) emitted by the primary optics unit (2) into one of the light module (105) converts emitted high-beam light distribution (20). The light module (105) according to claim 19, wherein the light module (105) comprises a further primary optics unit (24), and wherein the secondary optics unit (18) transmits a further intermediate light distribution (26) emitted by the further primary optics unit (24) into one of the light module ( 105) radiated Abblendlichtverteilung (28) converts.

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