Display device

Abstract

The invention relates to a display device comprising: a holding device (2) which can be placed on the head of a user; an image generation module (5) secured to the holding means; and an ophthalmic lens (3, 4) which is fastened to the holding device (2) and which images an at least two-color image in such a way that a user can perceive it as a virtual image, the image generation module having:-a first imager (6) for a first dichroic partial image,-a second imager (7) for a second dichroic partial image,-a second imager (8) for a second dichroic partial image, a second imager (7) for a second dichroic local image; and a combiner (15) comprising a first and a second entry surface (31, 32) and an exit surface (36), in which the first dichroic partial image is incident via the first entry surface (31) and is directed along the first color channel up to the first reflective layer (34, 35), and the second dichroic partial image is directed along the second color channel up to the second reflective layer (34, 35). The first reflective layer (34, 35) reflects one of the two dichroic partial images and transmits the other of the two dichroic partial images, and wherein the second dichroic partial image is incident via a second incident surface (32) and is guided along a second color channel up to the first reflective layer (34, 35), the two color-separated partial images are superimposed by means of a first reflective layer (34, 35) to form an at least two-color image which exits via an exit surface (36) of the combiner (15) and is guided to the spectacle lens (3, 4), the first entry surface (31) is formed and / or the first holographic image is formed in the first color channel in such a way that a first imaging function for the first dichroic partial image is present, and this function is used to correct aberrations caused by the ophthalmic lenses (3, 4).

Description

Technical Field

[0001] The present invention relates to a display device comprising: a holding device capable of being worn on a user's head; an image generation module fixed to the holding device and generating at least a two-color image; and an eyeglass lens fixed to the holding device and imaging the generated at least a two-color image while the holding device is worn on the head, such that the user can perceive the at least a two-color image as a virtual image. Background Technology

[0002] Such display devices are commonly referred to as smart glasses. In addition to the normal functions of a pair of glasses, smart glasses have an additional optical path through which the virtual image can be reflected back to the wearer. These display devices are designed to display multicolor virtual images with high image quality while maintaining the lowest possible weight. Summary of the Invention

[0003] Therefore, the object of the present invention is to further develop a display device of the type mentioned in the introduction in a way that satisfies the requirements mentioned in the introduction as much as possible.

[0004] The invention is defined in claim 1. Advantageous developments are described in detail in the dependent claims.

[0005] The display device includes: a holding device capable of being worn on a user's head; an image generation module fixed to the holding device and generating at least a two-color image; and a spectacle lens fixed to the holding device and imaging the generated at least a two-color image while the holding device is worn on the head, such that the user perceives the at least a two-color image as a virtual image. The image generation module may include: a first imager generating a first color-separated image of the at least a two-color image; a second imager generating a second color-separated partial image of the at least a two-color image; and a combiner including a first incident surface and a second incident surface, at least one first reflective layer, and an exit surface, the at least one first reflective layer reflecting one of the two color-separated partial images and transmitting the other of the two color-separated partial images. The first color-separated partial image is incident on the combiner via the first incident surface and guided to the first reflective layer along a first color channel. Furthermore, the second color-separated partial image is incident on the combiner via the second incident surface and guided to the first reflective layer along a second color channel. The combiner stacks the two color-separated local images by means of a first reflective layer to obtain the at least two-color image, which is emitted through the exit surface of the combiner and guided to the spectacle lens. The first incident surface and / or the first holographic image in the first color channel are formed in such a way that a first imaging function is provided for the first color-separated local image, which is used to correct aberrations caused by the spectacle lens.

[0006] This allows desired color corrections to be performed individually or selectively. Since the already necessary combiner will be adapted simply by forming the first incident surface and / or forming the first hologram in the first color channel, higher image quality can be achieved without increasing weight, which would otherwise be added if additional components were included.

[0007] At the first reflective layer, one of the two color-separated local images can be reflected, while the other of the two color-separated local images can be transmitted, thereby enabling overlay to obtain the at least two-color image.

[0008] The first incident surface may be curved and / or have a geometric structure to achieve a first imaging function for the first color-separated local image. The second incident surface may be planar and / or have no geometric structure.

[0009] Specifically, the corrected aberrations can be longitudinal chromatic aberration and / or lateral chromatic aberration.

[0010] The curvature of the first incident surface can be spherical, aspherical, or complex. Furthermore, the first incident surface can have a free-form curved surface that is not spherically curved, aspherically curved, or complexly curved. The geometry can, in particular, be the geometry that generates the diffraction grating.

[0011] Furthermore, the formation of the second incident surface and / or the formation of the second holographic image in the second color channel can be achieved by providing a second imaging function for the second color-separated local image, which is used to correct aberrations caused by the spectacle lens.

[0012] The second incident surface may be curved and / or have a geometric structure to enable a second imaging function for the second color-separated local image.

[0013] Furthermore, the image generation module may have a third imager that generates a third color-separated local image of the at least two-color image. In this case, the at least two-color image is preferably formed as at least a three-color image. The third color-separated local image is incident on the combiner via a third incident surface and guided along the third color channel to the second reflective layer of the combiner. The second reflective layer is reflective for a first wavelength range and transmissive for both the second and third wavelength ranges. In this case, the first reflective layer is preferably reflective for, for example, the second wavelength range and transmissive for both the first and third wavelength ranges. The first wavelength range can be selected based on the first color-separated local image, the second wavelength range can be selected based on the second color-separated local image, and the third wavelength range can be selected based on the third color-separated local image. These wavelength ranges are preferably selected such that the desired overlay of the three color-separated local images can be achieved to obtain at least a three-color image. For example, the three wavelength ranges can thus be appropriately selected for the red local image, the green local image, and the blue local image.

[0014] The formation of the third incident surface and / or the formation of the third holographic image in the third color channel can be achieved by providing a third imaging function for the third color-separated local image, which corrects aberrations caused by the spectacle lens. Specifically, the third incident surface can be curved and / or have a geometric structure to realize the third imaging function for the third color-separated local image. However, the third incident surface can also be planar and without a geometric structure.

[0015] The curvature of the second incident surface and the curvature of the third incident surface can be formed or further developed in the same manner as the curvature of the first incident surface. Furthermore, the geometry of the second incident surface and the geometry of the third incident surface can be formed or further developed in the same manner as the geometry of the first incident surface.

[0016] The first reflective layer can be formed as a first dichroic layer that reflects one of the color-separated local images from a group of first and second color-separated local images, and transmits the other color-separated local image. Furthermore, the combiner can have a second dichroic layer (e.g., a second reflective layer) that reflects one of the color-separated local images from a group of second and third color-separated local images, and transmits the other color-separated local image. Additionally, the first dichroic layer can transmit or reflect the third color-separated local image, and the second dichroic layer can transmit or reflect the first color-separated local image.

[0017] Specifically, the two dichroic layers can intersect at a 90° angle and be arranged in a beam combination cube (also known as an X-cube). For example, the beam combination cube is a dichroic prism cube in which four rectangular prisms are connected together to form a cube such that the first and second dichroic layers intersect at a 90° angle.

[0018] The first and second dichroic layers (or perhaps a first and second reflective layer) can also be spaced apart or parallel to each other. In this case, the combiner can be implemented as a prism bar (also called a bar combiner) having multiple parallelepiped prisms arranged in succession, wherein the dichroic layers are arranged on corresponding sides of the parallelepiped prisms. In this arrangement, additional colors of the multicolor image can be added, just as with each additional parallelepiped prism.

[0019] The beam path from the first imager to the first incident surface may not have imaging optics. The same applies to the beam path from the second imager to the second incident surface and the beam path from the third imager to the third incident surface.

[0020] However, at least one optical imaging element may also be arranged in at least one beam path in the beam path from the corresponding imager to the corresponding incident surface.

[0021] Furthermore, the exit surface of the combiner can be planar. However, the exit surface of the combiner can also be designed to be curved. In this case, the curved exit surface of the combiner represents an additional degree of design freedom for imaging at least two-color images. As a result of this use of the exit surface, the requirements associated with additional optical surfaces for guiding and coupling the output at least two-color images as virtual images are relaxed.

[0022] The spectacle lens may include a front side, a rear side, an incident section and a deflection section spaced apart from the incident section, an exit section in the rear side, and a light guiding channel. The spectacle lens may guide at least one bicolor image coupled to the spectacle lens via the incident section to the deflection section via at least one reflection within the spectacle lens. The deflection section deflects the at least bicolor image toward the exit section, such that the at least bicolor image exits the spectacle lens via the exit section.

[0023] The deflection section and the exit section can be spatially separate sections. In this case, the deflection section can deflect at least a two-color image toward the exit section, which then exits from the lens via the exit section. However, the deflection section and the exit section can also coincide spatially, for example, when the deflection section is designed as a surface grating.

[0024] The deflection segment may include a single reflective deflection element, a refractive deflection element, and / or a diffractive deflection element, or multiple adjacent reflective deflection elements, refractive deflection elements, or diffractive deflection elements. The desired deflection function and, optionally, imaging function of the deflection segment can be achieved, for example, in a Fresnel-like manner using multiple adjacent deflection elements (this can, of course, also be achieved using a single deflection element). The deflection element may be a reflective surface plate, a refractive surface plate, and / or a diffractive surface plate, which may also be referred to as a reflective plane, a refractive plane, and / or a diffractive plane. The reflective surface plate, refractive surface plate, and / or diffractive surface plate may be planar in their respective cases. However, the reflective surface plate, refractive surface plate, and / or diffractive surface plate may themselves be curved. They may be, for example, spherically curved or aspherically curved, or formed as a freely curved surface. In the same manner, a single reflective deflection element, refractive deflection element, and / or diffractive deflection element may be planar or curved. For example, for a given wavelength or color of the generated image, the reflectivity of the corresponding reflective deflection element (or a single reflective deflection element) can range from 1% to 100% (inclusive of the limits of that range). Therefore, the reflective deflection element can be, for example, reflective or partially reflective. In particular, one or more deflection elements may also have imaging capabilities in addition to their beam deflection function.

[0025] Since the deflection section of the coupled output should be as invisible as possible, and the negative impact from ambient light to the observer's eye should be as minimal as possible, it is generally preferred to have a deflection section with high transmittance in the transmitted light and associated with low reflectance of the beam to be coupled out to the generated image (preferably at least a two-color image). Typical values ​​for the reflectance-to-transmittance ratio are values ​​that are uniformly distributed across the visible light wavelength range, for example, less than or equal to 50% to greater than or equal to 1% (e.g., any value from this range in 1% increments), particularly, for example, 50%, 40%, 30%, 20%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, or 1%.

[0026] The incident section can have a single reflecting incident element, a refractive incident element, and / or a diffractive incident element, or multiple adjacent reflecting incident elements, refractive incident elements, or diffractive incident elements, in the same manner as the deflection section. One or more incident elements can be further developed in the same manner as the deflection elements. In particular, one or more incident elements can cause beam deflection and / or have imaging capabilities.

[0027] The exit section can have a single reflecting exit element, a refractive exit element, and / or a diffractive exit element, or multiple adjacent reflecting exit elements, refractive exit elements, or diffractive exit elements, in the same manner as the deflection section. One or more exit elements can be further developed in the same manner as the deflection elements. In particular, one or more exit elements can cause beam deflection and / or have imaging capabilities.

[0028] Specifically, the lens may have a curved rear side and / or a curved front side. The incident section may be formed in the rear side.

[0029] At least the bicolor image is preferably guided to the deflection segment by one or more reflections (especially total internal reflection). One or more reflections or total internal reflection can be achieved, for example, at the front and / or rear sides of the lens. However, at least one of the reflections or total internal reflection can also be achieved at a layer embedded in the lens, spaced apart from the front and rear sides.

[0030] The display device may have a control unit that controls the image generation module. In particular, the control unit may control the image generation module based on the supplied image data.

[0031] The imager can be designed as a surface-type imager. Corresponding imagers can include LCD modules, LCoS modules, OLED modules, µLED modules, or tilted mirror matrices. Each imager can have multiple pixels, which can be arranged, for example, in rows and columns. For example, each imager can be self-emissive or non-self-emissive.

[0032] Each imager can preferably generate a monochrome image, wherein different imagers generate monochrome images with different wavelengths (thus generating color-separated local images). At least one imager can also be designed to generate a multicolor image (thus generating multicolor-separated local images).

[0033] Therefore, the image generation module may include, for example, a combination of two or more monochrome imagers or a combination of a dual-color imager and a monochrome imager.

[0034] For example, a color-separated local image can be a red local image, a green local image, or a blue local image. At least one additional color-separated local image with a different wavelength (e.g., wavelengths from the IR range) can also be generated.

[0035] Obviously, without departing from the scope of the invention, the features mentioned above and the features to be explained below can be used not only in the specified combinations, but also in other combinations or individually. Attached Figure Description

[0036] The invention will now be illustrated in more detail with reference to the accompanying drawings, which also disclose essential features of the invention. These exemplary embodiments are for illustrative purposes only and should not be construed as limiting. For example, the description of an exemplary embodiment having a large number of elements or components should not be construed as meaning that all of these elements or components are necessary for implementation. Instead, other exemplary embodiments may also include alternative elements and components, fewer elements or components, or additional elements or components. Unless otherwise stated, elements or components of different exemplary embodiments may be combined with each other. Modifications and variations described with respect to one exemplary embodiment may also apply to other exemplary embodiments. To avoid repetition, the same or corresponding elements in different drawings are given the same reference numerals and are not repeated. In the drawings:

[0037] Figure 1 A schematic perspective illustration of an embodiment of a display device according to the present invention is shown;

[0038] Figure 2 A partially enlarged cross-sectional view of the first spectacle lens is shown, including a schematic illustration of the image generation module;

[0039] Figure 3 An enlarged illustration of an image generation module according to another exemplary embodiment is shown;

[0040] Figure 4 An enlarged illustration of an image generation module according to another exemplary embodiment is shown, and

[0041] Figure 5An enlarged illustration of an image generation module according to another exemplary embodiment is shown. Detailed Implementation

[0042] exist Figure 1 In the illustrated embodiment, the display device 1 according to the present invention includes: a holding device 2, which can be worn on a user's head and can be designed, for example, in the manner of a conventional eyeglass frame; and a first spectacle lens 3 and a second spectacle lens 4 fixed to the holding device 2. The holding device 2 having spectacle lenses 3 and 4 can be designed, for example, as sports glasses, sunglasses, and / or glasses for correcting visual impairments, wherein a virtual image can be superimposed onto the user's field of vision via the first spectacle lens 3, which is designed as a spectacle lens according to the present invention and can also be referred to as a multifunctional lens, as described below.

[0043] For this purpose, the display device 1 includes an image generation module 5, which can be arranged in the area of ​​the right temple of the eyeglasses in the holding device 2, such as... Figure 1 As illustrated schematically, the image generation module 5 may include a first imager unit 6 for generating a red local image, a second imager unit 7 for generating a green local image, and a third imager unit 8 for generating a blue local image, as shown below. Figure 2 As illustrated schematically, each of the imager units 6 to 8 accordingly includes surface-type image generating elements 9, 10, and 11. Each of the surface-type image generating elements 9 to 11 may include, for example, an OLED element, an LCD element, an LCoS element, a µLED module, or a tilted mirror matrix, each of which includes, for example, a plurality of pixels arranged in rows and columns. As representatives of the beams emitted from the surface-type image generating elements 9 to 11 (and therefore representatives of the corresponding color-separated local images), individual beams L1, L2, and L3 are schematically drawn in their respective cases.

[0044] Of course, the specific arrangement of the first imager unit 6 for generating the red local image, the second imager unit 7 for generating the green local image, and the third imager unit 8 for generating the blue local image is merely an example. The three imager units 6 to 8 can also be interchanged as needed. For example, the first imager unit 6 and the third imager unit 8 can be interchanged.

[0045] As in Figure 2As can be further seen, the image generation module 5 further includes a stacking element 15 or a combiner 15 (here in the form of a beam splitter cube) and an image module optics unit 16. The image module optics unit 16 may be omitted or integrated into the first spectacle lens 3. Furthermore, a control unit 17 for controlling the image generation module 5 is provided, which has, for example, a processor P and a memory M. The control unit 17 controls the image generation module 5, particularly the image generation elements 9 to 11, according to the supplied image data, such that the color-separated partial images generated by the three image generation elements 9 to 11 present to the observer as a stacked result of a multicolor image based on the image data. For this purpose, beams L1 to L3 from the three surface-type image generation elements 9 to 11 are stacked by the stacking element 15 to form a common beam L4, which travels through the image module optics unit 16 and enters the spectacle lens 3 via the curved rear side 18. The incident area at the rear side 18 may also be referred to as the incident section 19. If the image module optical element unit 16 is part of the spectacle lens 3, then the first surface of the image module optical element unit 16 on which light is incident is the incident surface or incident section 19.

[0046] The first lens 3 further includes a curved frontal side 20 and a deflection section 21 embedded in the first lens 3.

[0047] The deflection section 21 includes a reflection deflection structure 22 having multiple reflection deflection elements 23, which may also be referred to as reflection facets.

[0048] As already described, beams L1 to L3, as a common beam L4, enter the first lens 3 via the incident section 19 in the rear side 18. The common beam L4 is then guided in the first lens 3, for example, by total internal reflection at the rear side 20 and the front side 18, to the deflection section 21, creating a light guiding path 29 from the incident section 19 to the deflection section 21. The deflection section 21 deflects the common beam L4 toward the rear side 18 in such a way that the deflected common beam L4 exits the first lens 3 via the rear side 18. The region through which the common beam L4 exits can also be referred to as the exit section 26.

[0049] The image generation module 5 and the first lens 3 are designed such that a user wearing the display device 1 according to the invention on his head can perceive the multicolor image generated by means of the image generation module 5 as a multicolor virtual image.

[0050] When the common beam L4 (and thus the color-separated local image) is guided in the first lens 3, aberrations (e.g., longitudinal and / or lateral chromatic aberrations) may occur, for example, due to input coupling via the curved incident section 19 at the curved rear side 18 and due to total internal reflection at the curved front side 20 and the curved rear side 18. These aberrations are wavelength-dependent and therefore different for the color-separated local image (e.g., in terms of the actual size or actual contour of the aberration), which may result in undesirable image errors that can be perceived by the user.

[0051] In order to correct these wavelength-dependent aberrations, the combiner 15 is specifically designed as described below.

[0052] Combiner 15 includes a first incident surface 31, a second incident surface 32, and a third incident surface 33 (each incident surface is curved), a first dichroic beam splitter layer 34, a second dichroic beam splitter layer 35, and an exit surface 36. A red local image (beam L1) enters combiner 15 via the first incident surface 31, a green local image (beam L2) enters via the second incident surface 32, and a blue local image (beam L3) enters via the third incident surface 33, and they travel to the dichroic beam splitter layers 34 and 35. In a variant not shown, only one of the three incident surfaces 31 to 33 is curved, while the remaining two incident surfaces 31 to 33 are planar. In another variant not shown, exactly two of the three incident surfaces 31 to 33 are curved, while the remaining incident surface 31 to 33 is planar.

[0053] The first dichroic beam splitter layer 34 reflects the red local image (beam L1) and transmits the green local image (beam L2) and the blue local image (beam L3). The second dichroic beam splitter layer 34 reflects the blue local image (beam L3) and transmits the red local image (beam L1) and the green local image (beam L2). As a result, the three dichroic local images (beams L1 to L3) are stacked to obtain a multicolor image and exit the combiner 15 via the exit surface 36.

[0054] The region of combiner 15 from the first incident surface 31 to the first dichroic beam splitter layer 34 can be referred to as the first color channel (here, the red channel). Similarly, the region of combiner 15 from the second incident surface 32 to the first dichroic beam splitter layer 34 and the second dichroic beam splitter layer 35 can be referred to as the second color channel (here, the green channel), and the region of combiner 15 from the third incident surface 33 to the second dichroic beam splitter layer 35 can be referred to as the third color channel (here, the blue channel).

[0055] As in Figure 2The diagram is presented in a highly exaggerated and illustrative manner, showing that the first incident surface 31 and the third incident surface 33 are, for example, concavely curved, and the second incident surface 32 is convexly curved. However, this is merely an example. For instance, all three incident surfaces could also be concavely or convexly curved. Furthermore, for example, only one or two of the three incident surfaces 31 to 33 could be concave or convexly curved. The key point regarding the possible curvature of at least one of the incident surfaces 31 to 33 is that wavelength-dependent aberrations appearing in the first spectacle lens 3 due to light guidance can be wavelength-selectively corrected (here, for the red, green, and blue local images) using the corresponding curved incident surfaces 31 to 33.

[0056] For example, the curvature of the corresponding incident surfaces 31 to 33 can be spherical, aspherical, or complex. Surfaces with free-form curvature without spherical, aspherical, or complex curvature are also possible.

[0057] With the curved incident surfaces 31 to 33, chromatic aberration can therefore be corrected individually, particularly in terms of color. This is especially advantageous in combination with the first lens 3, since the first lens 3 is made of a single material (e.g., monolithically), making it impossible to correct chromatic aberration by selecting a combination of achromatic materials.

[0058] In addition, such as Figure 3 As shown in the exemplary embodiment (where only the image generation module 15 is shown in enlarged view), the exit surface 36 can be curved (with...). Figure 2 (The exit surface 36 is planar in contrast to embodiments.) The exit surface 36 represents an additional interface, and therefore represents additional design freedom for multicolor images. By using the exit surface 36 as an interface with imaging effect (due to the curvature of the exit surface 36), the requirements associated with the remaining optically effective surfaces of the first spectacle lens 3 are relaxed, such as those associated with the deflection segment 21.

[0059] exist Figure 4 In an exemplary embodiment, the incident surfaces 31 to 33 are not curved, but planar, and have a geometry that generates an imaging function in a diffractive manner. It can also be said that each of the incident surfaces 31 to 33 has a diffraction grating. For example, these diffraction gratings have a structure that, according to... Figure 2 The curved incident surfaces 31 to 33 have the same imaging optical functions.

[0060] exist Figure 5 In an exemplary embodiment, the incident surfaces 31 to 33 are not curved, but planar. Furthermore, holographic images 31', 32', and 33' are formed in color channels, providing the desired imaging functionality for the color-separated local images.

[0061] Based on the reflectivity of deflecting element 23, the user can perceive a virtual image superimposed on the environment. At very high reflectivity, especially at 100% reflectivity, if the user does not exceed a certain distance from deflecting element 23, the user can perceive only the virtual image and not the environment, at least within the region of deflection segment 21. If the user exceeds the certain distance from deflecting element 23, ambient light can pass through these deflecting elements unimpeded and reach the eye, allowing the environment to be observed even at 100% reflectivity of deflecting element 23, as if a perforated / segmented 100% reflective mirror were present.

[0062] The first deflection structure 22 can provide pure beam deflection. Preferably, the first deflection structure can also provide imaging effects.

[0063] In the display device 1 according to the invention, the superposition of the virtual image into the user's field of vision is achieved via the first spectacle lens 3. Of course, superposition via the second spectacle lens 4 is also possible. Furthermore, the display device 1 can be designed such that information or the virtual image is reflected via both spectacle lenses 3 and 4. Superposition can be performed in a manner that creates a three-dimensional image impression. However, this is not absolutely necessary.

[0064] Lenses 3 and 4 can have zero or non-zero refractive power (especially for correcting visual impairments). Specifically, both the frontal side 20 and the posterior side 18 can be curved. In particular, the frontal side 20 is spherically curved. If lenses 3 and 4 have non-zero refractive power to correct visual impairments, the curvature of the posterior side 18 is typically chosen accordingly to achieve the corresponding correction. The posterior side 18 can have a curvature deviating from a spherical shape.

Claims

1. A display device, comprising: The holding device (2) can be worn on the user's head. Image generation module (5), which is fixed to the holding device (3) and generates at least a two-color image, and The spectacle lenses (3, 4) are fixed to the holding device (2) and, while the holding device (2) is worn on the head, image the generated at least two-color image in such a way that the user can perceive the at least two-color image as a virtual image. The image generation module has the following features: - A first imager (6), the first imager generates a first color-separated local image of the at least two-color image, and - Second imager (7), the second imager generates a second color-separated local image of the at least two-color image. -A combiner (15), the combiner comprising at least a first incident surface and a second incident surface (31, 32), at least one first reflective layer (34, 35), and an exit surface (36), the at least one first reflective layer reflecting one of the two color-separated local images and transmitting the other of the two color-separated local images. in, The first color-separated partial image is incident on the combiner (15) via the first incident surface (31) and guided along the first color channel to the first reflective layer (34, 35). The second color-separated partial image is incident on the combiner (15) via the second incident surface (32) and guided along the second color channel to the first reflective layer (34, 35). The combiner (15) stacks the two color-separated local images by means of the first reflective layer (34, 35) to obtain the at least two-color image, which is emitted through the exit surface (36) of the combiner (15) and guided to the lens (3, 4). The first incident surface (31) and / or the first holographic image is formed in the first color channel in such a way that a first imaging function is available for the first color-separated local image, the first imaging function being used to correct aberrations caused by the eyeglass lenses (3, 4).

2. The display device as claimed in claim 1, wherein, The first incident surface (31) is curved and / or has a geometric structure to enable the first imaging function for the first color-separated local image.

3. The display device as claimed in claim 1 or 2, wherein, The second incident surface (32) and / or the second holographic image is formed in the second color channel in such a way that a second imaging function is available for the second color-separated local image, the second imaging function being used to correct aberrations caused by the spectacle lenses (3, 4).

4. The display device as claimed in claim 3, wherein, The second incident surface is curved and / or has a geometric structure to achieve the second imaging function for the second color-separated local image.

5. The display device as claimed in any of the preceding claims, wherein, The combiner (15) has a second reflective layer (34, 35) that is reflective for a first wavelength range and transmissive for a second wavelength range.

6. The display device as claimed in claim 5, wherein, The two reflective layers (34, 35) intersect at a 90° angle and are arranged in the beam combination cube.

7. The display device as claimed in any of the preceding claims, wherein, There are no imaging optics in the beam path from the first imager (7) to the first incident surface (31).

8. The display device as claimed in any of the preceding claims, wherein, The exit surface (36) of the combiner (15) is curved.

9. The display device as claimed in any of the preceding claims, wherein, The eyeglass lens (3, 4) has: a front side (20) and a rear side (18). Incident section (19) and deflection section (21) spaced apart from said incident section (19); The ejection section (26) in the rear side (18); as well as A light guiding channel (29) guides the at least two-color image, which is coupled into the lens (3) via an incident section (19) and reaches the deflection section (21) by at least one reflection in the lens (3), through which the at least two-color image is deflected to exit the lens (3) via the exit section (26).

10. The display device as claimed in claim 9, wherein, The deflection section (21) includes multiple adjacent deflection elements (23) for reflection, refraction and / or diffraction.

11. The display device as claimed in any of the preceding claims, wherein, The aberrations caused by the eyeglass lenses (3, 4) are longitudinal chromatic aberration and / or lateral chromatic aberration.

Images