Optoelectronic module

Abstract

The invention relates to an optoelectronic module (1), comprising a luminescence diode (10) which is designed to emit unpolarised emission radiation (101) in an emission angle range (β), and a functional element (20). The functional element (20) separates the emission radiation (101) into a first radiation (102A) with a first polarisation and a second radiation (102B) with a second polarisation. The first radiation (102A) and the second radiation (102B) emerge on a common output coupling side (20A) of the functional element (20). The functional element (20) deflects the first radiation (102A) into a first angular range (ω1) and the second radiation (102B) into a second angular range (ω2) different from the first angular range (ω1).

Description

[0001] 2023PF00602 September 25, 2024 P2023,0787 WO N - 1 - Description OPTOELECTRONIC MODULE An optoelectronic module is specified. The optoelectronic module is configured to emit electromagnetic radiation. One problem to be solved is to specify an optoelectronic module with particularly high efficiency. This problem is solved by a device according to the independent patent claim. Advantageous embodiments and developments of the device are the subject matter of the dependent patent claims and will further emerge from the following description and the figures. According to at least one embodiment, the optoelectronic module comprises a light-emitting diode configured to emit unpolarized emission radiation in an emission angle range. The light-emitting diode preferably radiates into the entire half-space. For example, the emission angle range covers a range of ± 90°.In particular, the light-emitting diode comprises an optically active region configured to generate the emission radiation. The optically active region preferably has a pn junction, a double heterostructure, a single quantum well (SQW) structure, or a multi-quantum well (MQW) structure for generating radiation. For example, the light-emitting diode is a light-emitting diode or a laser diode. The emission radiation is preferably emitted in one emission direction. 2023PF00602 September 25, 2024 P2023,0787 WO N - 2 - Unpolarized radiation, here and below, refers to electromagnetic radiation composed of a plurality of individual waves with different positions of oscillation planes and relative phases to one another. The emission angle range corresponds to an angle of ±90°. In other words, the total emission angle range corresponds to an amount of 180°.According to at least one embodiment, the optoelectronic module comprises a functional element. The functional element is in particular permeable to the emission radiation emitted by the light-emitting diode during operation. The functional element is preferably arranged downstream of the light-emitting diode in the emission direction. According to at least one embodiment of the optoelectronic module, the functional element separates the emission radiation into a first radiation with a first polarization and a second radiation with a second polarization. Polarized radiation is, for example, polarized according to one of the following types of polarization: linear, circular, or elliptical. For example, the first radiation is polarized in the same way as the second radiation. In other words, for example, the type of polarization of the first radiation does not differ from the type of polarization of the second radiation.According to at least one embodiment of the optoelectronic module, the first radiation and the second radiation exit on a common output side of the functional element. The emission radiation transmits in particular through the functional element and exits again on the output side of the functional element as first and second radiation. 2023PF00602 September 25, 2024 P2023,0787 WO N - 3 - In other words, the functional element transmits a predominant portion of the emission radiation. According to at least one embodiment of the optoelectronic module, the functional element deflects the first radiation into a first angular range and the second radiation into a second angular range different from the first angular range. This advantageously results in a spatial separation of the first and second radiation downstream of the functional element.According to at least one embodiment, the optoelectronic module comprises: - a light-emitting diode configured to emit unpolarized emission radiation in an emission angle range, and - a functional element, wherein - the functional element separates the emission radiation into a first radiation with a first polarization and a second radiation with a second polarization, - the first radiation and the second radiation exit on a common output side of the functional element, and - the functional element deflects the first radiation into a first angular range and deflects the second radiation into a second angular range different from the first angular range. An optoelectronic module described here is based, among other things, on the following considerations: Polarized electromagnetic radiation is required in a variety of optical applications.For example, many projection systems are based on LCD or LCOS imagers, which require illumination with polarized electromagnetic radiation. Light-emitting diodes can serve as particularly efficient light sources, but they often emit unpolarized electromagnetic radiation. Polarization with conventional polarization filters often results in high efficiency losses or complicated illumination concepts. The optoelectronic module described here utilizes, among other things, the idea of ​​using a functional element that splits unpolarized electromagnetic radiation into a first radiation of a first polarization and a second radiation of a second polarization, and deflects these radiations into different angular ranges. This results in a compact and efficient system for utilizing the entire emission of a light-emitting diode for a projection system.According to at least one embodiment of the optoelectronic module, the first polarization is oriented orthogonally to the second polarization. For example, the first radiation is linearly polarized in a first plane, and the second radiation is linearly polarized in a second plane, wherein the first plane and the second plane enclose an angle of 90° to one another. Alternatively, the first radiation is right-circularly polarized and the second radiation is left-circularly polarized. According to at least one embodiment of the optoelectronic module, the first angular range and the second angular range do not overlap. "Non-overlapping" means that they do not overlap within a manufacturing tolerance. In particular, the first angular range 2023PF00602 September 25, 2024 P2023,0787 WO N - 5 - directly borders the second angular range.Without an overlap of the first and second angular ranges, an advantageously particularly good spatial separation of the first and second radiation downstream of the functional element results. According to at least one embodiment of the optoelectronic module, an imaging element is arranged downstream of the functional element, which imaging element images the first and second angular ranges into a first and second imaging region. The imaging element preferably comprises one or more lenses or a lens system. In particular, the imaging element comprises at least one converging lens. The first and second imaging regions are in particular two spatially separate regions of a common imaging plane. Preferably, only first radiation impinges on the first imaging region and only second radiation impinges on the second imaging region.According to at least one embodiment of the optoelectronic module, a delay module with a first delay element and a second delay element is arranged downstream of the functional element. In particular, the delay module is configured to specifically change the polarization of electromagnetic radiation. The delay module preferably adjusts the first polarization to the second polarization such that they are aligned parallel to one another. In particular, the first delay element is congruent with the first imaging region. Furthermore, the second delay element is preferably congruent with the second imaging region. Advantageously, polarized electromagnetic radiation with a single polarization exits the delay module on an output side. 2023PF00602 25.September 2024 P2023,0787 WO N - 6 - According to at least one embodiment of the optoelectronic module, an imager is arranged downstream of the delay module. The imager is configured, in particular, to generate a pixelated image based on a predetermined pattern. For example, the imager is designed as a liquid crystal display (LCD) or a liquid crystal on silicon substrate (LCOS). According to at least one embodiment of the optoelectronic module, a collimation element is arranged between the light-emitting diode and the functional element, which collimates the emission radiation within a collimation angle range of ±α°. The collimation element is preferably configured to collimate the emission radiation emanating from the light-emitting diode. The collimation element is formed, for example, with one or more lenses or a lens system.In particular, the collimation element comprises at least one converging lens. Alternatively, the collimation element is formed with a reflector system or a combination of a reflector and a lens. The collimation angle range extends in a range from α° to -α°, where 0° describes an orientation parallel to the emission direction. The collimation angle range thus covers a total range of 2α°. α corresponds in particular to an angle of 30°, preferably to an angle of 20°, more preferably to an angle of 10°, and particularly preferably to an angle of 5°. Consequently, the collimation angle range 2023PF00602 September 25, 2024 P2023,0787 WO N - 7 - corresponds, for example, to a range of ±30°, preferably to a range of ±20°, more preferably to a range of ±10°, and particularly preferably to a range of ±5°.According to at least one embodiment of the optoelectronic module, the first angular range corresponds to a range of 2α and the second angular range to a range of -2α. In other words, the first angular range extends in a range from 0° to 2α°, and the second angular range extends in a range from 0° to -2α°, where 0° describes an orientation parallel to the emission direction. An absolute value of the collimation angle range therefore advantageously corresponds to an absolute value of the first angular range. In particular, an absolute value of the collimation angle range corresponds to an absolute value of the second angular range. According to at least one embodiment of the optoelectronic module, the functional element is designed as a metaoptic.In particular, the functional element comprises an artificially produced structure made of a base material whose permeability to electric and magnetic fields (permittivity and permeability) deviates from the permeability of the base material typically found in nature. This is achieved by specially manufactured, microscopically fine structures (cells, individual elements) made of electrically or magnetically active materials. An average size of the structures used is, in particular, smaller than a main emission wavelength of the light-emitting diode. A main emission wavelength describes here and below a wavelength at which an emission spectrum has a global intensity maximum. 2023PF00602 September 25, 2024 P2023,0787 WO N - 8 - According to at least one embodiment of the optoelectronic module, the functional element has a periodically repeating arrangement of structures along its lateral extent.For example, the structures comprise a plurality of columns and / or recesses. In particular, an orientation of the structures also follows a periodically repeating pattern. According to at least one embodiment of the optoelectronic module, the functional element comprises a first phase function and a second phase function, wherein the first phase function influences a phase of the first radiation and the second phase function influences a phase of the second radiation. Preferably, the first phase function does not influence the phase of the second radiation, and the second phase function preferably does not influence the phase of the first radiation. A phase function here and below describes a change in an optical phase of an incident electromagnetic radiation as a function of a location of incidence. In particular, the first and second phase functions are each a linear function with a constant gradient.According to at least one embodiment of the optoelectronic module, a difference between the gradients of the phase functions is at least 0.5 rad / µm and at most 32 rad / µm. Preferably, a difference between the gradients of the phase functions is at least 1 rad / µm and at most 16 rad / µm, and particularly preferably, a difference between the gradients of the phase functions is at least 2 rad / µm and at most 8 rad / µm. According to at least one embodiment of the optoelectronic module, at least one phase function has a periodic profile with a plurality of uniform jump regions. In particular, at least one phase function has the shape of a sawtooth curve. Preferably, both phase functions have the shape of a sawtooth curve. In particular, jump points of the sawtooth curves are arranged one above the other. Alternatively, the jump points of the sawtooth curves can be offset from one another on an x-axis.According to at least one embodiment of the optoelectronic module, the phase function within each jump region has a phase change of n*2π, where n is a natural number. According to at least one embodiment of the optoelectronic module, a local optical axis of the functional element is constant along its lateral extent. Constant here and below means: unchanged within a manufacturing tolerance. In particular, an alignment of the optical axis of the functional element is constant along its lateral extent. The lateral extent describes an extent transverse, in particular perpendicular, to a direction from which the functional element is irradiated with the emission radiation. According to at least one embodiment, the optoelectronic module comprises a beam combiner, a plurality of light-emitting diodes, and a plurality of 2023PF00602 September 25, 2024 P2023,0787 WO N - 10 - functional elements.The beam combiner is shaped, for example, as a dichroic cube. According to at least one embodiment of the optoelectronic module, different light-emitting diodes are configured to emit electromagnetic radiation, each for a different main emission wavelength. For example, the module comprises a first, a second, and a third light-emitting diode. The first light-emitting diode preferably emits electromagnetic radiation with at least a first main emission wavelength in the red spectral range. The second light-emitting diode preferably emits electromagnetic radiation with at least a second main emission wavelength in the green spectral range. The third light-emitting diode preferably emits electromagnetic radiation with at least a third main emission wavelength in the blue spectral range.Alternatively, at least one of the light-emitting diodes emits electromagnetic radiation with a main emission wavelength in the infrared spectral range. According to at least one embodiment of the optoelectronic module, each light-emitting diode is assigned a functional element. Advantageously, each functional element is optimized for the main emission wavelength of the light-emitting diode assigned to it. According to at least one embodiment of the optoelectronic module, the electromagnetic radiation from all light-emitting diodes is superimposed on one another in the beam combiner. In particular, the electromagnetic radiation emitted by all 2023PF00602 September 25, 2024 P2023,0787 WO N - 11 - light-emitting diodes during operation leaves the beam combiner at a common output side of the beam combiner. According to at least one embodiment of the optoelectronic module, the delay module is arranged downstream of the beam combiner.An optoelectronic module described here is particularly suitable for use as an efficient and compact portable LED projection system. For example, the optoelectronic module can be used in head-up displays, augmented reality displays, or virtual reality displays. Further advantages and advantageous configurations and developments of the optoelectronic module emerge from the following, in conjunction with the exemplary embodiments illustrated in the figures. They show: Figure 1: a schematic view of an optoelectronic module described here according to a first exemplary embodiment; Figure 2: a profile of phase functions along a lateral extension of a functional element according to a first exemplary embodiment; Figures 3A and 3B: a profile of phase functions along a lateral extension of a functional element according to a second exemplary embodiment.September 2024 P2023,0787 WO N - 12 - embodiment in different coordinate systems, Figures 4A and 4B show a profile of phase functions along a lateral extent of a functional element according to a third embodiment in different coordinate systems, Figure 5 shows a schematic view of a functional element according to a first embodiment, Figure 6 shows a schematic view of a functional element according to a second embodiment, Figure 7 shows a schematic view of a functional element according to a third embodiment, Figure 8 shows a schematic view of a functional element according to a fourth embodiment and Figure 9 shows a schematic view of an optoelectronic module described here according to a second embodiment. Identical, similar or identically acting elements are provided with the same reference numerals in the figures.The figures and the relative sizes of the elements illustrated in the figures are not to be considered to scale. Rather, individual elements may be exaggerated for clarity and / or clarity. 2023PF00602 September 25, 2024 P2023,0787 WO N - 13 - Figure 1 shows a schematic view of an optoelectronic module 1 described here according to a first exemplary embodiment. The optoelectronic module 1 comprises a light-emitting diode 10, which is configured to emit unpolarized emission radiation 101 in an emission angle range β, and a functional element 20. The light-emitting diode 10 radiates, for example, into the entire half-space. In particular, the emission angle range β covers a range of ± 90°. In particular, the light-emitting diode 10 comprises an optically active region, which is configured to generate the emission radiation 101.The optically active region preferably has a pn junction, a double heterostructure, a single quantum well (SQW) structure, or a multi-quantum well (MQW) structure for generating radiation. For example, the LED 10 is a light-emitting diode or a laser diode. The emission radiation 101 is preferably emitted in one emission direction. Unpolarized radiation, here and below, refers to electromagnetic radiation composed of a plurality of individual waves with different positions of oscillation planes and relative phases to one another. The emission angle range β corresponds to an angular range of ±90°. In other words, the total emission angle range β corresponds to an amount of 180°. The functional element 20 is transparent to the emission radiation 101 emitted by the LED 10 during operation. The functional element 20 is preferably the 2023PF00602 25.September 2024 P2023,0787 WO N - 14 - arranged downstream of the light-emitting diode 10 in the emission direction. On a side facing away from the light-emitting diode 10, the functional element 20 has an output side 20A. The functional element 20 separates the emission radiation 101 into a first radiation 102A with a first polarization and a second radiation 102B with a second polarization. Polarized radiation is polarized, for example, according to one of the following types of polarization: linear, circular, or elliptical. For example, the first radiation 102A is polarized in the same way as the second radiation 102B. In other words, for example, the type of polarization of the first radiation 102A does not differ from the type of polarization of the second radiation 102B. Preferably, the first radiation 102A and the second radiation 102B are both linearly polarized. The first polarization is oriented orthogonally to the second polarization.For example, the first radiation 102A is linearly polarized in a first plane, and the second radiation 102B is linearly polarized in a second plane, wherein the first plane and the second plane enclose an angle of 90° with each other. Alternatively, the first radiation 102A is right-circularly polarized, and the second radiation 102B is left-circularly polarized. The first radiation 102A and the second radiation 102B exit on the common output side 20A of the functional element 20. The emission radiation 101 transmits in particular through the functional element 20 and exits again on the output side 20A of the functional element 20 as first and second radiation 102A, 102B. In other words, the functional element 20 transmits a predominant portion of the emission radiation 101.The functional element 20 deflects the first radiation 102A into a first angular range ω1 and the second radiation 102B into a second angular range ω2 that differs from the first angular range ω1. This advantageously results in a spatial separation of the first and second radiation 102A, 102B downstream of the functional element 20. A local optical axis of the functional element 20 is constant along its lateral extent. Constant here and below means: unchanged within a manufacturing tolerance. In other words, the functional element 20, in particular, does not have a locally changing optical axis. The functional element 20 is designed as a metaoptic. In particular, the functional element 20 comprises an artificially produced structure made of a base material whose permeability for electrical and / or magnetic fields (permittivity and permeability) deviates from the permeability of the base material that is customary in nature.This is achieved by specially manufactured, microscopically fine structures (cells, individual elements) made of electrically and / or magnetically active materials. An average size of the structures used is, in particular, smaller than a main emission wavelength of the light-emitting diode 10. A main emission wavelength describes here and below a wavelength at which an emission spectrum has a global intensity maximum. The functional element 20 has a periodically repeating arrangement of structures along its lateral extent. The lateral direction extends transversely, in particular perpendicularly, to the emission direction or main radiation direction of the light-emitting diode 10. For example, the structures comprise a plurality of columns and / or recesses. In particular, an orientation of the structures also follows a periodically repeating pattern.The functional element 20 comprises a first phase function Φ. A and a second phase function Φ B , where the first phase function Φ A a phase of the first radiation 102A is influenced and the second phase function Φ B a phase of the second radiation 102B. Preferably, the first phase function Φ A the phase of the second radiation 102B is not, and the second phase function Φ B preferably does not affect the phase of the first radiation 102A. A phase function Φ A , Φ B describes here and in the following a change in the optical phase of an incident electromagnetic radiation depending on the location of incidence. In particular, the first and second phase functions Φ A , Φ Beach a linear function with a constant gradient. The first angular range ω1 and the second angular range ω2 do not overlap. “Non-overlapping” means that they do not overlap within the scope of a manufacturing tolerance. In particular, the first angular range ω1 directly borders on the second angular range ω2. Without an overlap of the first and second angular ranges ω1, ω2, an advantageously particularly good spatial separation of the first and second radiation 102A, 102B results at a certain distance after passing the functional element 20. 2023PF00602 September 25, 2024 P2023,0787 WO N - 17 - The first angular range ω1 corresponds to a range of 2α°, and the second angular range ω2 corresponds to a range of -2α°.In other words, the first angular range ω1 extends in a range from 0° to 2α°, and the second angular range ω2 extends in a range from 0° to -2α°, where 0° describes an orientation aligned parallel to the main emission direction of the emission radiation 101. Furthermore, an imaging element 40 is arranged downstream of the functional element 20, which images the first and second angular ranges ω1, ω2 into first and second imaging regions X1, X2. The imaging element 40 preferably comprises a lens. In particular, the imaging element 40 comprises a converging lens. The first and second imaging regions X1, X2 are in particular two spatially separate regions of a common imaging plane. The imaging plane is preferably arranged at a focal length f of the imaging element 40. Preferably, only first radiation 102A impinges on the first imaging region X1 and only second radiation 102B impinges on the second imaging region X2.For the sake of clarity, only the beam path of the second radiation 102B is shown as an example in Figure 1. A delay module 30 having a first delay element 31 and a second delay element 32 is further arranged downstream of the functional element 20. In particular, the delay module 30 is configured to specifically change a polarization of electromagnetic radiation. Preferably, the delay module 30 matches the first polarization of the first radiation 102A to the second polarization of the second radiation 102B such that the polarizations of the first and second radiation 102A, 102B are aligned parallel to one another. The delay element 30 is arranged in the imaging plane of the imaging element 40. In particular, the first delay element 31 is congruent with the first imaging region X1.Furthermore, the second delay element 32 is preferably congruent with the second imaging region X2. Polarized electromagnetic radiation with a single polarization advantageously exits the delay module 30 on an output side 30A. An image generator 50 is arranged downstream of the delay module 30. The image generator 50 is configured in particular to generate a pixelated image based on a predetermined pattern. For example, the image generator 50 is designed as a liquid crystal display (LCD for short) or a liquid crystal on silicon substrate (LCOS for short). The light-emitting diode 10 illuminates the image generator 50. A collimation element 60 is arranged between the light-emitting diode 10 and the functional element 50. The collimation element 60 is preferably configured to collimate the emission radiation 101 emanating from the light-emitting diode 10.In particular, the collimation element 60 comprises a converging lens. The collimation element 60 collimates the emission radiation 101 within a collimation angle range ω of ±α°. 2023PF00602 September 25, 2024 P2023,0787 WO N - 19 - The collimation element 60 is formed, for example, with one or more lenses or a lens system. Alternatively, the collimation element 60 is formed with a reflector system or a combination of a reflector and a lens. The collimation angle range ω extends in a range from α° to -α°, where 0° describes an orientation aligned parallel to the main radiation direction of the emission radiation 101. The collimation angle range ω thus covers a total range of 2α°. α corresponds in particular to an angle of 30°, preferably to an angle of 20°, more preferably to an angle of 10° and particularly preferably to an angle of 5°.Consequently, the collimation angle range ω corresponds, for example, to a range of ±30°, preferably to a range of ±20°, more preferably to a range of ±10°, and particularly preferably to a range of ±5°. Figure 2 shows a curve of phase functions Φ. A , Φ B along a period d of the lateral extent x of a functional element 20 according to a first embodiment. The first and second phase functions Φ A , Φ B are each a linear function with a constant gradient. The first and second phase functions Φ A , Φ B each have a maximum phase value of 2π over the period d of the lateral extension x of the functional element 20. The period d extends over the entire lateral extension of the functional element 20. In particular, the first and second phase functions Φ A , Φ Beach have a maximum phase value of a multiple of 2π over the lateral extent x of the functional element 20. The magnitude of the slope of the first phase function Φ A corresponds in particular to 2023PF00602 25 September 2024 P2023,0787 WO N - 20 - the magnitude of the slope of the second phase function Φ B . Preferably, the slope of the first phase function Φ A an opposite sign than the slope of the second phase function Φ B For example, a difference of gradients of the phase functions Φ A , Φ B at least 0.5 rad / µm and at most 32 rad / µm. Preferably, the difference between the gradients of the phase functions Φ A , Φ B at least 1rad / µm and at most 16rad / µm, and particularly preferably a difference of gradients of the phase functions Φ A , Φ B at least 2 rad / µm and at most 8 rad / µm. The first and second phase functions Φ A , ΦB can be shifted relative to each other in the lateral direction x, for example, to enable easier production of a corresponding functional element 20. Figures 3A and 3B show a course of phase functions Φ A , Φ B along a lateral extent x of a functional element 20 according to a second embodiment in different coordinate systems. Essentially, the second embodiment corresponds to the first embodiment shown in Figure 2. In contrast to the first embodiment, the phase functions Φ A , Φ Beach divided into a plurality of jump regions P at periodic intervals d. The functional element 20 comprises a plurality of periods d along its entire extension in the lateral direction x. At least one phase function has a periodic profile with a plurality of uniform jump regions P, the extension of which in the lateral direction x each corresponds to a period d. Preferably, both phase functions have the shape of a sawtooth curve. In particular, jump points of the sawtooth curves are arranged one above the other. Alternatively, the jump points of the sawtooth curves can be shifted relative to one another along the lateral direction x. The phase functions Φ A , Φ B have a phase change of n*2π, where n is a natural number, within each jump range P. Advantageously, such a phase function Φ A , Φ Bbe more easily manufactured in a functional element 20. The example shown in Figure 3A comprises three jump regions P, but two or more than three or even many more jump regions P are also possible. In Figure 3B, the phase functions Φ A , Φ B of Figure 3A in an alternative coordinate system. In the representation according to Figure 3B, the values ​​of the phase functions Φ A , Φ B are chosen as the coordinate axes. This results in a linear line that extends from a phase value of 2π on the axis of the second phase function Φ B up to a phase value of 2π on the axis of the first phase function Φ A extends, wherein a lateral extension of the functional element 20 within a jump range P starting at x=0 and ending at x=d is considered. Figures 4A and 4B show a course of phase functions Φ A , Φ Balong a lateral extent x of a functional element 20 according to a third embodiment in different coordinate systems. Essentially, the third embodiment corresponds to the second embodiment shown in Figures 3A and 3B. In contrast to the second embodiment, the jump regions P of the phase functions Φ A , Φ B are shifted in the lateral direction x. The first phase function Φ A has a plurality of first jump areas P A and the second phase function Φ B has a plurality of second jump areas P B The first and second jump areas P A , P B are shifted in the lateral direction x by half a period d. Alternatively, the first and second jump regions P A , P Bbe shifted from each other by any amount in the lateral direction x. This design freedom can advantageously facilitate the manufacture of the functional element 20. In Figure 4B, the phase functions Φ A , Φ B of Figure 4A in an alternative coordinate system. In the representation according to Figure 4B, the values ​​of the phase functions Φ A , Φ B are chosen as coordinate axes. This results in two linear lines that extend from a phase value of 2π on the axis of the second phase function Φ B up to a phase value of 2π on the axis of the first phase function Φ Aextends, wherein a lateral extension x of the functional element 20 is considered starting at x=0, via x=d / 2 and ending at x=d. Figure 5 shows a schematic view of a functional element 20 according to a first exemplary embodiment. The view in Figure 5 shows the functional element 20 as it appears in the direction of the emission direction z. The functional element 20 comprises a plurality of different structures that repeat along the lateral direction x in a plurality of periods d. 2023PF00602 September 25, 2024 P2023,0787 WO N - 23 - For example, the structures comprise a plurality of columns and / or recesses. In particular, an orientation of the structures also follows a periodically repeating pattern. An average size of the structures used is in particular smaller than a main emission wavelength of the light-emitting diode 10. The structures are formed as rectangles with variable edge lengths.Figure 6 shows a schematic view of a functional element 20 according to a second exemplary embodiment. The second exemplary embodiment essentially corresponds to the first exemplary embodiment shown in Figure 5. In contrast to the first exemplary embodiment, the orientation of the structures also varies. In particular, one edge of the rectangular structures is aligned parallel to a first polarization A and a second edge is aligned parallel to a second polarization B. Figure 7 shows a schematic view of a functional element 20 according to a third exemplary embodiment. The third exemplary embodiment essentially corresponds to the first exemplary embodiment shown in Figure 5. In contrast to the first exemplary embodiment, the structures are arranged in the shape of crosses whose main axes are aligned parallel to the lateral x-direction and the lateral y-direction.Figure 8 shows a schematic view of a functional element 20 according to a fourth exemplary embodiment. The fourth exemplary embodiment essentially corresponds to the third exemplary embodiment shown in Figure 7. In contrast to the third exemplary embodiment, the main axes of the crosses are aligned transversely to the lateral x-direction and the lateral y-direction. Figure 9 shows a schematic view of an optoelectronic module 1 described here according to a second exemplary embodiment. The optoelectronic module 1 comprises an additional beam combiner 70, a plurality of light-emitting diodes 10, and a plurality of functional elements 20. The beam combiner 70 is shaped, for example, as a dichroic cube. Different light-emitting diodes 10 are each configured to emit electromagnetic radiation for a different main emission wavelength.The optoelectronic module 1 comprises a first, a second, and a third light-emitting diode 11, 12, 13. The first light-emitting diode 11 preferably emits electromagnetic radiation with at least a first main emission wavelength in the red spectral range. The second light-emitting diode 12 preferably emits electromagnetic radiation with at least a second main emission wavelength in the green spectral range. The third light-emitting diode 13 preferably emits electromagnetic radiation with at least a third main emission wavelength in the blue spectral range. Alternatively, at least one of the light-emitting diodes 11, 12, 13 emits electromagnetic radiation with a main emission wavelength in the infrared spectral range. 2023PF00602 September 25, 2024 P2023,0787 WO N - 25 - Each light-emitting diode 11, 12, 13 is assigned a functional element 20.Advantageously, each functional element 20 is optimized for the main emission wavelength of its associated light-emitting diode 11, 12, 13. The electromagnetic radiation from all light-emitting diodes 11, 12, 13 is superimposed in the beam combiner 70. In particular, the electromagnetic radiation emitted by all light-emitting diodes 11, 12, 13 during operation leaves the beam combiner 70 at a common output side 70A of the beam combiner 70. The delay module 30 is arranged downstream of the beam combiner 70. The invention is not limited by the description based on the exemplary embodiments. Rather, the invention encompasses any novel feature and any combination of features, which in particular includes any combination of features in the patent claims, even if this feature or combination itself is not explicitly specified in the patent claims or exemplary embodiments.This patent application claims priority from German patent application 102023125990.3, the disclosure of which is hereby incorporated by reference.

[0002] 2023PF00602 September 25, 2024 P2023,0787 WO N - 26 - List of reference symbols 1 optoelectronic module 10 light-emitting diode 11 first light-emitting diode 12 second light-emitting diode 13 third light-emitting diode 20 functional element 20A output side of the functional element d period 30 delay module 30A output side of the delay module 31 first delay element 32 second delay element 40 imaging element f focal length of the imaging element 50 image generator 60 collimation element 70 beam combiner 70A output side of the beam combiner 101 emission radiation 102A first radiation of first polarization 102B second radiation of second polarization β emission angle range ω collimation angle range ω1 first angle range ω2 second angle range X1 first imaging area X2 second imaging area Φ A first phase function Φ B second phase function P jump range P A first jump area 2023PF00602 September 25, 2024 P2023,0787 WO N - 27 - PB second jumping area

Claims

2023PF00602 September 25, 2024 P2023,0787 WO N - 28 - Claims 1. Optoelectronic module (1), comprising: - a light-emitting diode (10) which is designed to emit an unpolarized emission radiation (101) in an emission angle range (β), and - a functional element (20), wherein - the functional element (20) separates the emission radiation (101) into a first radiation (102A) with a first polarization and a second radiation (102B) with a second polarization, - the first radiation (102A) and the second radiation (102B) emerge on a common output side (20A) of the functional element (20), and - the functional element (20) deflects the first radiation (102A) into a first angular range (ω1) and the second radiation (102B) into an angle different from the first angular range (ω1) different second angular range (ω2). 2.Optoelectronic module (1) according to the preceding claim, in which - the first polarization is oriented orthogonally to the second polarization.

3. Optoelectronic module (1) according to one of the preceding claims, in which - the first angular range (ω1) and the second angular range (ω2) do not overlap.

4. Optoelectronic module (1) according to one of the preceding claims, in which - an imaging element (40) is arranged downstream of the functional element (20), which imaging element covers the first and second angular ranges. 2023PF00602 September 25, 2024 P2023,0787 WO N - 29 - (ω1, ω2) into a first and second imaging region (X1, X2).

5. Optoelectronic module (1) according to one of the preceding claims, in which - a delay module (30) with a first delay element (31) and a second delay element (32) is arranged downstream of the functional element (20).

6. Optoelectronic module (1) according to the preceding claim, in which - an image generator (50) is arranged downstream of the delay module (30).

7. Optoelectronic module (1) according to one of the preceding claims, wherein - a collimation element (60) is arranged between the light-emitting diode (10) and the functional element (20), which collimates the emission radiation (101) within a collimation angle range (ω) of ± α°. 8.Optoelectronic module (1) according to the preceding claim, in which - the first angular range (ω1) corresponds to a range of 2α° and the second angular range (ω2) corresponds to a range of -2α°.

9. Optoelectronic module (1) according to one of the preceding claims, in which - the functional element (20) is designed as a metaoptic.

10. Optoelectronic module (1) according to the preceding claim, in which. 2023PF00602 September 25, 2024 P2023,0787 WO N - 30 - - the functional element (20) has a periodically repeating arrangement of structures along its lateral extent.

11. Optoelectronic module (1) according to one of the preceding claims, in which - the functional element (20) has a first phase function (Φ A ) and a second phase function (Φ B ), where the first phase function (Φ A ) influences a phase of the first radiation (102A) and the second phase function (Φ B) influences a phase of the second radiation (102B).

12. Optoelectronic module (1) according to the preceding claim, in which - a difference between gradients of the phase functions is at least 0.5 rad / µm and at most 32 rad / µm.

13. Optoelectronic module (1) according to one of the preceding claims, in which - at least one phase function has a periodic profile with a plurality of uniform jump regions (P).

14. Optoelectronic module (1) according to the preceding claim, in which - the phase function within each jump region (P) has a phase change of n*2π, where n is a natural number.

15. Optoelectronic module (1) according to one of the preceding claims, in which - a local optical axis of the functional element (20) is constant along its lateral extent. 2023PF00602 September 25, 2024 P2023,0787 WO N - 31 - 16. Optoelectronic module (1) according to one of the preceding claims, comprising a beam combiner (70), a plurality of light-emitting diodes (10) and a plurality of functional elements (20), wherein - different light-emitting diodes (10) are configured to emit electromagnetic radiation for a respective different main emission wavelength, - each light-emitting diode (10) is assigned a functional element (20), - the electromagnetic radiation from all light-emitting diodes (10) is superimposed on one another in the beam combiner (70), and - the delay module (30) is arranged downstream of the beam combiner (70).

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