DE102019201766A1 - Projection device for data glasses, method for displaying image information by means of a projection device and control device - Google Patents

Abstract

The invention relates to a projection device (1002) for data glasses (1000). The projection device (1002) comprises an image generation unit (1004) for generating at least one first light beam (1010) representing image information and / or a further first light beam (1011) representing the image information and at least one deflecting element (1008) which is designed around the first light beam (1010) in the form of a second light beam (1012) representing a first image information and / or the further first light beam (1011) in the form of a third light beam (1013) representing a second image information into a first viewing area (1014) and / or in deflecting a second viewing area (1018) of an eye (405), the second light beam (1012) and the third light beam (1013) differing in terms of beam divergence and wherein the second viewing area (1018) and the first viewing area (1018) at least overlap.

Description

State of the art

The approach is based on a device or a method according to the preamble of the independent claims. The subject of the present approach is also a computer program.

There are known data glasses for displaying information in a field of vision of a user.

Disclosure of the invention

Against this background, with the approach presented here, a projection device for data glasses, a method for displaying image information by means of a projection device, furthermore a control device using this method and finally a corresponding computer program according to the main claims are presented. The measures listed in the dependent claims make advantageous developments and improvements of the device specified in the independent claim possible.

The advantages that can be achieved with the approach presented are that a resource-saving, simple system structure of a projection device for data glasses with only very few components is made possible. For example, a significantly simplified holographic function, less effort in image data processing and greatly reduced tolerance requirements are made possible.

• eine Bilderzeugungseinheit zum Erzeugen zumindest eines eine Bildinformation repräsentierenden ersten Lichtstrahls und zusätzlich oder alternativ eines die Bildinformation repräsentierenden weiteren ersten Lichtstrahls; und
• zumindest ein Umlenkelement, das ausgebildet ist, um den ersten Lichtstrahl in Form eines eine erste Bildinformation repräsentierenden zweiten Lichtstrahls und zusätzlich oder alternativ den weiteren ersten Lichtstrahl in Form eines eine zweite Bildinformation repräsentierenden dritten Lichtstrahls in einen ersten Sichtbereich und zusätzlich oder alternativ in einen zweiten Sichtbereich eines Auges umzulenken, wobei sich der zweite Lichtstrahl und der dritte Lichtstrahl hinsichtlich einer Strahldivergenz unterscheiden und wobei der zweite Sichtbereich und der erste Sichtbereich zumindest überlappen.

A projection device for data glasses is presented, the projection device having the following features:

• an image generation unit for generating at least one first light beam representing image information and additionally or alternatively a further first light beam representing the image information; and
• At least one deflection element which is designed to divert the first light beam in the form of a second light beam representing first image information and additionally or alternatively the further first light beam in the form of a third light beam representing second image information into a first viewing area and additionally or alternatively into a second viewing area of an eye, wherein the second light beam and the third light beam differ in terms of beam divergence and wherein the second viewing area and the first viewing area at least overlap.

The different beam divergences of the second light beam and the third light beam advantageously enable differently perceptible image sharpness of the image information for the eye. For example, the second light beam can have a beam divergence for the perception of a higher image sharpness than the third light beam. In the following, the image information transmitted by the second light beam is referred to as first image information and the image information transmitted by the third light beam is referred to as second image information. The first image information and the second image information can differ from one another only with regard to a perceptible image sharpness. The different beam divergences can be generated by different deflection sections with different deflection efficiencies of the deflection element. Thus, the deflection efficiency for generating the third light beam for the unsharp projection can be lower than the deflection efficiency for generating the second light beam for the sharp projection.

In other words, the deflecting element is designed to display the first image information using the second light beam within the first visual range and the second visual range of the eye and to display the second image information using the third light beam within the first visual range and the second visual range of the eye, the The light deflected into the first visual area of the eye and the light deflected into the second visual area of the eye differ in terms of their beam divergence and thus in terms of the perceptible image sharpness, and the second visual area and the first visual area at least overlap.

According to one embodiment, the image generation unit can be designed to generate the first light beam and the further first light beam, wherein the first light beam and the further first light beam can differ from one another with regard to a wavelength.

According to this embodiment, the projection device comprises at least one deflection element which is designed to deflect the first light beam in the form of the second light beam and the further first light beam in the form of the third light beam into the first field of view and also into the second field of view of the eye, the differentiate the second light beam and the third light beam with regard to beam divergence and wherein the second field of view and the first field of view at least overlap.

The task of the different wavelengths is here to be distinguishable for the deflecting element. The whole point is that that Deflection element can distinguish the two first light beams (both can not be divergent) and then deflects one into the second light beam and deflects the other into the third light beam, the second and third light beams then differing in their divergence.

Data glasses can be understood to mean glasses for displaying visual information in a field of view of a wearer of the data glasses. Visual information can be understood to mean, for example, an image point or image content. Depending on the embodiment, the first or the second image information can represent a monochrome or color image. The two pieces of image information can represent, for example, one and the same image content at different virtual image distances and thus image sharpnesses perceived differently. For example, the first image information can be an image that is perceived as being sharp and the second image information can be an image that is perceived as being blurred. The light beams can each be, for example, a laser beam (monochrome image display) or a plurality of approximately superimposed laser beams (multicolored image display). The image sharpness is not to be understood as a physical property of the light beam, but rather a consequence of the distance between the viewer's eye and the distance of the virtual image. Here, for example, the second light beam represents a virtual image at a great distance, while the third light beam can represent an image on the plane of a spectacle lens. This second image cannot be shown in focus due to the short distance to the eye.

A deflecting element can be understood to mean an element for deflecting the first light beam and additionally or alternatively a further first light beam. In particular, the deflecting element can be a hologram, a holographic optical element or an optionally partially transparent mirror. Other operating principles are also conceivable, for example. For example, the deflecting element can also be implemented as an optical phase array, electro- or magneto-optical deflector or as an array of such deflectors. The deflecting element can be integrated into a spectacle lens of the data glasses, for example. Depending on the embodiment, the deflecting element can comprise at least a first deflecting section for deflecting the first light beam in the form of the second light beam into the first viewing area and a second deflecting section for deflecting the further first light beam in the form of the third light beam into the second viewing area. The deflecting sections can be, for example, hologram or mirror layers. A viewing area can be understood to mean an area that can be perceived by one eye of the wearer when the data glasses are worn. The first and the second viewing area can at least overlap or be arranged congruently. In particular, the first viewing area can be a central viewing area of the eye and the second viewing area can be a peripheral viewing area of the eye.

Each light beam can cover the entire field of vision. Both the image information of the third light beam that is perceived as blurred and the image information of the second light beam that is perceived as being sharp can be selectively switched off or dimmed depending on the viewing direction of the user, for example to save energy.

The first light beam can also be, for example, a beam composed of a plurality of first light beams. The further first light beam can also be a beam composed of a plurality of further first light beams. The second light beam can also be a beam composed of a plurality of second light beams. The third light beam can also be a beam composed of a plurality of third light beams.

The approach presented here is based on the knowledge that data glasses can use a suitable deflection element, in particular for example a holographic optical element, to project images of different sharpness into several at least overlapping or congruently arranged viewing areas of a viewer's eye. For example, by utilizing the physiology of the human eye, it can be achieved that sharp image content and also fuzzy image content can be displayed at the same time, for example superimposed.

This enables a resource-saving system structure with the smallest possible number of components. For example, a number of required light sources can be reduced to one or two light sources in the case of monochrome image display and to three to six light sources in the case of full-color image display (RGB). With two basic colors and the resulting mixed colors, for example two to four light sources can also be sufficient. Thus, a number of required reflection layers, such as hologram layers, can be reduced in a corresponding manner. At the same time, the approach presented here enables the implementation of data glasses with a large field of view, also known as the "field of view", and a large, effective eyebox. The functionality of the smart glasses can thus be improved.

According to one embodiment, the deflection element can be designed to generate the second light beam from the first light beam by deflecting it in such a way that the first image information has a higher perceived image sharpness than the second image information. The deflecting element can be designed to display the first image information within a central visual area of the eye as the first visual area and, additionally or alternatively, to display the second image information within a peripheral visual area of the eye as the second visual area. In addition, the deflecting element can be designed to display the first image information within the peripheral visual area of the eye as the second visual area and, additionally or alternatively, the second image information within the central visual area of the eye as the first visual area. Here, the first image information can have an image with a higher image sharpness. The different image sharpness can arise in particular through the virtual image distance. With a correspondingly strong contact lens for extreme farsightedness, the second image information can also be sharply perceptible. A central viewing area can be understood as an area in which the eye perceives images with high visual acuity, ie foveally. A peripheral viewing area can be understood to mean an area in which the eye perceives images with reduced visual acuity, ie peripherally. For example, the central viewing area can be at least partially surrounded by the peripheral viewing area. This enables image information to be displayed with high image sharpness in all areas that can be perceived by the eye, that is to say in those in which the eye can actually see clearly and also in those in which it can see blurred. This can increase the efficiency of the projection device. Thus, the manufacturing cost of the projection apparatus can be reduced.

The deflecting element can be designed to deflect or display the first image information within the first viewing area and additionally or alternatively within the second viewing area and additionally or alternatively the second image information within the second viewing area and additionally or alternatively within the first viewing area, the second viewing area and the first viewing area can be arranged congruently. This enables a simultaneous display of a sharp image content and also a fuzzy image content in, for example, an entire field of view of the eye. Expensive tracking of specific image contents for specific visual areas of the eye can thus advantageously be dispensed with.

The deflecting element can be designed to deflect the first light beam in the form of the second light beam representing the first image information and additionally or alternatively at least the further first light beam in the form of the third light beam representing the second image information to a point located behind a pupil of the eye.

It is also advantageous if the deflecting element is designed to deflect at least one additional first light beam generated by the image generation device in the form of a further second light beam representing the first image information to the point. This enables an overall larger field of view compared to a deflection of the first light beam and additionally or alternatively of the further first light beam, for example to a point arranged in or on the pupil. Using the deflecting element, all second light beams can also be deflected onto the point behind the pupil.

The deflecting element can for example be designed to send the first light beam in the form of the second light beam and additionally or alternatively the further first light beam in the form of the third light beam representing the second image information and additionally or alternatively the additional first light beam in the form of the further second light beam Redirect point that represents a pivot point of the eye. This enables a particularly large angular width for a particularly large field of view of the eye. The first image content is thus advantageously still visible even in the case of larger rotational movements of the eye, for example within an angular range of 60 °.

It is also advantageous if the deflecting element comprises at least one hologram layer for deflecting the first light beam, in particular wherein the deflecting element can comprise at least one further hologram layer for deflecting the further first light beam representing the image information, the further hologram layer being arranged in a different position than the hologram layer can be. A hologram layer can be understood as a holographic optical element implemented as a layer. Another layer can be understood as another layer, for example the hologram layer and the further hologram layer can be arranged one behind the other, for example flush, overlapping or offset. With this embodiment, the deflecting element can be implemented simply and inexpensively. A particularly large number of deflection options for light rays can be covered by hologram layers in different planes.

According to a further embodiment, the projection device can have a spectacle lens. Here, the deflecting element can be part of the Spectacle lenses can be realized, in particular the deflecting element can be cast into the spectacle lens and additionally or alternatively laminated and additionally or alternatively applied to the spectacle lens and additionally or alternatively exposed. A spectacle lens can be understood to mean, for example, a pane or a lens made of glass or plastic. Depending on the embodiment, the spectacle lens can be shaped in order to correct refractive errors of the eye. This embodiment enables a particularly simple, inconspicuous and inexpensive integration of the deflecting element.

Here, the deflecting element can extend over at least a major portion of a surface of the spectacle lens. This enables a field of vision of the eye to be covered over the largest possible area by the deflecting element.

According to a further embodiment, the projection device can have an eye position determination unit for determining an eye position of the eye. The image generation unit can be designed to generate the first light beam and / or the further first light beam as a function of the eye position and additionally or alternatively the deflecting element can be designed to generate the second light beam and additionally or alternatively the third light beam as a function of the eye position redirect. The eye position determination unit can comprise, for example, a camera for detecting the eye position. With this embodiment, an eye position-dependent and therefore energy-saving display of the first or second image information can be achieved. For example, the first image information can be displayed more intensely as a function of the eye position using the second light beam in the first viewing area, and additionally or alternatively the second image information as a function of the eye position using the third light beam in the first viewing area can be displayed less intensively or not at all become. This enables more intensive perception of sharp image information in the central field of vision of the eye.

The eye position determination unit can additionally or alternatively be designed to determine the eye position using infrared light.

Furthermore, the image generation unit can be designed to generate the first light beam and, additionally or alternatively, the further first light beam in such a way that the first image information and, additionally or alternatively, the second image information represent an at least two-colored, in particular multicolored, image. This can improve the display quality of the projection device.

• Erzeugen zumindest des ersten Lichtstrahls und zusätzlich oder alternativ des weiteren ersten Lichtstrahls; und
• Umlenken des ersten Lichtstrahls in Form des die erste Bildinformation repräsentierenden zweiten Lichtstrahls und zusätzlich oder alternativ des weiteren ersten Lichtstrahls in Form des die zweite Bildinformation repräsentierenden dritten Lichtstrahls in den ersten Sichtbereich und zusätzlich oder alternativ den zweiten Sichtbereich des Auges, wobei der erste Lichtstrahl und zusätzlich oder alternativ der weitere erste Lichtstrahl derart umgelenkt wird, dass sich der zweite Lichtstrahl und der dritte Lichtstrahl hinsichtlich einer Strahldivergenz unterscheiden und wobei der zweite Sichtbereich und der erste Sichtbereich zumindest überlappen.

The approach presented here also creates a method for displaying image information by means of a projection device according to one of the preceding embodiments, the method comprising the following steps:

• Generating at least the first light beam and additionally or alternatively the further first light beam; and
• Deflecting the first light beam in the form of the second light beam representing the first image information and additionally or alternatively the further first light beam in the form of the third light beam representing the second image information into the first viewing area and additionally or alternatively the second viewing area of the eye, the first light beam and additionally or alternatively the further first light beam is deflected in such a way that the second light beam and the third light beam differ in terms of beam divergence and wherein the second field of view and the first field of view at least overlap.

In the deflecting step, the second light beam can be deflected in such a way as to display the first image information within the first viewing area and the second viewing area, and additionally or alternatively the third light beam can be deflected in such a way as to display the second image information within the second viewing area and the first viewing area .

Before the deflecting step, the method can have a deflecting step in which at least the first light beam and additionally or alternatively the further first light beam are deflected. For example, the first light beam generated by a permanently installed light generating unit and additionally or alternatively further first light beam can be deflected in the step of deflection from a, for example, movable micromirror onto a deflection element, before it is then deflected into the fields of view by the, for example, immovable deflection element / become.

This method can be implemented, for example, in software or hardware or in a mixed form of software and hardware, for example in a control device.

The approach presented here also creates a control device which is designed to carry out, control or implement the steps of a variant of a method presented here in corresponding devices. Also by this embodiment of the invention in the form of a Control device, the task underlying the invention can be solved quickly and efficiently.

For this purpose, the control device can have at least one processing unit for processing signals or data, at least one memory unit for storing signals or data, at least one interface to a sensor or an actuator for reading in sensor signals from the sensor or for outputting control signals to the actuator and / or have at least one communication interface for reading in or outputting data that is embedded in a communication protocol. The computing unit can be, for example, a signal processor, a microcontroller or the like, wherein the memory unit can be a flash memory, an EPROM or a magnetic storage unit. The communication interface can be designed to read in or output data wirelessly and / or wired, a communication interface that can read in or output wired data, for example, can read this data electrically or optically from a corresponding data transmission line or output it into a corresponding data transmission line.

In the present case, a control device can be understood to mean an electrical device that processes sensor signals and outputs control and / or data signals as a function thereof. The control device can have an interface which can be designed in terms of hardware and / or software. In the case of a hardware design, the interfaces can, for example, be part of a so-called system ASIC, which contains a wide variety of functions of the control device. However, it is also possible that the interfaces are separate, integrated circuits or at least partially consist of discrete components. In the case of a software design, the interfaces can be software modules that are present, for example, on a microcontroller alongside other software modules.

A computer program product or computer program with program code, which can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk or an optical memory, and for performing, implementing and / or controlling the steps of the method according to one of the embodiments described above is also advantageous is used, especially when the program product or program is executed on a computer or device.

• 1 eine schematische Darstellung eines Funktionsprinzips eines Near-to-eye-Displays einer Datenbrille;
• 2 eine schematische Darstellung eines Funktionsprinzips eines Near-to-eye-Displays einer Datenbrille;
• 3 ein Diagramm zur Darstellung einer Sehschärfe als Funktion eines Winkels an einer optischen Achse;
• 4 eine schematische Darstellung eines Funktionsprinzips eines Retinal-Scan-Displays einer Datenbrille;
• 5 eine schematische Darstellung eines Funktionsprinzips eines Retinal-Scan-Displays einer Datenbrille;
• 6 eine schematische Darstellung einer Datenbrille mit einer Projektionsvorrichtung gemäß einem Ausführungsbeispiel;
• 7 eine schematische Darstellung einer Projektionsvorrichtung gemäß einem Ausführungsbeispiel;
• 8 eine schematische Darstellung einer Projektionsvorrichtung gemäß einem Ausführungsbeispiel;
• 9 eine schematische Darstellung einer Projektionsvorrichtung gemäß einem Ausführungsbeispiel;
• 10 eine schematische Darstellung einer Projektionsvorrichtung gemäß einem Ausführungsbeispiel;
• 11 eine schematische Darstellung einer Projektionsvorrichtung gemäß einem Ausführungsbeispiel;
• 12 eine schematische Darstellung einer Projektionsvorrichtung gemäß einem Ausführungsbeispiel;
• 13 ein Ablaufdiagramm eines Verfahrens zum Darstellen von Bildinformationen mittels einer Projektionsvorrichtung gemäß einem Ausführungsbeispiel; und
• 14 eine schematische Darstellung eines Steuergeräts gemäß einem Ausführungsbeispiel.

Embodiments of the approach presented here are shown in the drawings and explained in more detail in the description below. It shows:

• 1 a schematic representation of a functional principle of a near-to-eye display of data glasses;
• 2 a schematic representation of a functional principle of a near-to-eye display of data glasses;
• 3 a diagram showing visual acuity as a function of an angle on an optical axis;
• 4th a schematic representation of a functional principle of a retinal scan display of data glasses;
• 5 a schematic representation of a functional principle of a retinal scan display of data glasses;
• 6 a schematic representation of data glasses with a projection device according to an embodiment;
• 7th a schematic representation of a projection device according to an embodiment;
• 8th a schematic representation of a projection device according to an embodiment;
• 9 a schematic representation of a projection device according to an embodiment;
• 10 a schematic representation of a projection device according to an embodiment;
• 11 a schematic representation of a projection device according to an embodiment;
• 12th a schematic representation of a projection device according to an embodiment;
• 13th a flowchart of a method for displaying image information by means of a projection device according to an embodiment; and
• 14th a schematic representation of a control device according to an embodiment.

In the following description of advantageous exemplary embodiments of the present approach, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, a repeated description of these elements being dispensed with.

1 shows a schematic representation of a functional principle of a near-to-eye display 100 of data glasses, called NTE display for short. A microdisplay is shown as a near-to-eye display 100, which has a deflection optics in the form of a prism 102 and a lens 104 can be viewed. The field of view, also called “field of view” or FOV for short, of such a system can be determined by the size of the coupling prism 102 be limited.

Data glasses show the user image information in his field of vision. In general, a distinction can be made between data glasses for virtual reality, English virtual reality, and data glasses for augmented reality, or AR for short. With data glasses for virtual reality, a real environment can be hidden and replaced by a virtual world. With data glasses for augmented reality, virtual image content can be superimposed on the real environment. AR glasses can therefore, for example, be made transparent or partially transparent. Possible areas of application for AR glasses are, for example, sports glasses for displaying speed, navigation data, cadence or pulse rate, safety glasses for workshops, glasses or helmets in the context of driver assistance or navigation systems, safety glasses for displaying instructions, operating instructions or cable routing as well as glasses for home use. For example, to display a virtual control panel or a recipe.

AR glasses can be implemented, for example, as NTE displays or as retinal scan displays, or RSD for short. In the case of NTE displays, a real image is generated very close to the viewer's eye, for example by means of a microdisplay, and viewed through optics, for example a magnifying glass. 1 shows an example of such a system. The virtual image appears to the eye at a certain distance and is only seen in focus when the eye focuses on this distance.

2 shows a schematic representation of a functional principle of a near-to-eye display 200 data glasses. This is a microdisplay 202 viewed via deflection optics and a lens. In contrast to the in 1 In this case, the image is not coupled into the eye via an additional optical element in front of the spectacle lens, but rather through a light guide within the spectacle lens. In addition, there are coupling and decoupling elements 204 , here holograms, integrated. The space required by the coupling and decoupling elements 204 depends on the desired field of view.

With retinal scan displays, the image is written directly onto the retina. The image therefore never exists outside the eye.

So that the image can be perceived by the eye, it is necessary for the exit pupil of the system to spatially overlap with the entrance pupil of the eye.

3 Fig. 13 is a diagram showing visual acuity 900 , here plotted on the y-axis, as a function of an angle on an optical axis, here plotted on the x-axis. The highest density of sensory cells is located in the area of the so-called macula of the eye, with the highest visual acuity being achieved in its center, the so-called fovea. How out 3 As can be seen, the range of sharp vision is very limited. Visual acuity drops to 30 percent of its maximum value within just plus / minus 5 degrees. In order to make the area of sharp vision appear larger, the human eye unconsciously moves a few times per second to image a different area of the environment onto the fovea.

4th shows a schematic representation of a functional principle of a retinal scan display 400 data glasses.

A possible technical implementation of AR glasses with the so-called retinal scan display is shown 400 , also called RSD for short. With the retinal scan display 400 creates an image directly on the retina or retina of an eye 405 written. Outside the eye 405 the image therefore never exists. The image is created using a fast moving laser beam 410 written directly on the retina, such a procedure is also called a light point or flying spot procedure. By using, in a lens 415 integrated, holographic optical elements 420 , also called HOE, such a display system can be implemented in a particularly compact manner. This is a laser beam 410 by means of a micromirror 425 over the lens 415 scanned and from the HOE 420 in the lens 415 in the eye 405 directed by the viewer. Such a HOE 420 can be designed in such a way that it only deflects the laser wavelength and otherwise for the human eye 405 acts transparently. The presentation of the content is focus-free, ie the virtual content appears sharp regardless of the accommodation distance of the eye 405 as well as possible visual impairments. Except for the glasses 415 , which can take over the vision correction at the same time, no additional optical element is required in front of the eye.

A basic problem with compact RSDs 400 is a size of the so-called "eyebox", ie the exit pupil of the optical system. So a picture of the eye 405 can be perceived, the exit pupil of the optical system must match the entrance pupil of the eye 405 spatial overlap. 4th and 5 show the schematic representation of the problem. The compact optical system, here with the micromirror as an example 425 with a small diameter, limits a diameter of the laser beam used for image display 410 . With a single eye position shown here, a large image can be displayed, but even with small eye movements, e.g. B. to fully view this large picture exits the pupil 430 of the eye 405 the exit pupil of the system and the image disappears, as in 5 shown.

In summary, a holographic optical element steers 420 in the lens 415 all incident rays from the micromirror 425 into the pupil 430 of the eye 405 around. The micromirror 425 is on the eye pupil 430 pictured. In 4th looks the eye 405 straight ahead with an exemplary angle of 0 °. The fovea (5 ° extent) of the eye 405 is in the center of the field of view. In this way, the full field of view, here 60 ° as an example, is in 4th perceptible.

5 shows a schematic representation of a functional principle of a retinal scan display 400 data glasses. This can be the in 4th described retinal scan displays 400 act with the difference that one point of view of the eye 405 is shown rotated by 10 °.

The aperture of the micromirror 425 , here 1mm as an example, limits the diameter of the laser beam used for image display 410 . Therefore, a large image can be displayed with a certain eye position (see 4th ) but even with small eye movements (here 10 °), e.g. B. to fully view this large picture exits the pupil 430 of the eye 405 the exit pupil of the system and the image disappears.

6 shows a schematic representation of data glasses 1000 with a projection device 1002 according to an embodiment. The projection device is only exemplary 1002 according to this embodiment, at least partially in or on the smart glasses 1000 arranged.

The projection device 1002 has an image generation unit 1004 and one here, for example, in a spectacle lens 1006 the data glasses 1000 integrated, deflection element 1008 on, for example in the lens 1006 is cast and / or laminated. According to an alternative embodiment, the deflecting element 1008 on the lens 1006 be arranged applied. The spectacle lens is only exemplary 1006 according to this embodiment, part of the projection device 1002 .

The imaging unit 1004 is designed to generate a first light beam representing first image information 1010 or a corresponding bundle of rays and / or a further first light beam representing the image information 1011 to generate and in the deflection element 1008 to steer. To this end, the projection device 1002 optionally a movable or immobile micromirror 425 on, which is arranged and formed to the first light beam 1010 and / or the further first light beam 1011 from the imaging unit 1004 to the deflection element 1008 to steer. The deflection element 1008 , for example a hologram layer or a composite of a plurality of hologram layers, is formed around the first light beam 1010 in the form of a second light beam representing first image information 1012 and / or the further first light beam 1011 in the form of a third light beam representing second image information 1013 in a first viewing area 1014 and / or a second viewing area 1018 of the eye 405 deflect, with the second light beam 1012 and the third ray of light 1013 differ with regard to a beam divergence and wherein the second field of view 1018 and the first viewing area 1014 at least overlap. According to this exemplary embodiment, the first and the second image information differ with regard to the perceptible image sharpness, wherein the two image information can represent one and the same image content. According to this embodiment, the deflection element 1008 formed to the second beam of light 1012 in the first viewing area 1014 and the second viewing area 1018 of the eye 405 and divert the third ray of light 1013 in the second viewing area 1018 and the first field of view 1014 of the eye 405 redirect. The two fields of vision 1014 , 1018 are generally completely congruent, ie both viewing areas 1014 , 1018 cover the entire field of vision or the lens 1006 from. The deflection element 1008 extends according to an embodiment over a large part of a surface of the spectacle lens 1006 to cover the largest possible area of a field of view of the eye 405 to cover. For example, it is the first viewing area 1014 around a central field of vision within which the eye 405 Can perceive images with high visual acuity, and at the second field of view 1018 around a peripheral field of vision within which the eye 405 Can perceive images with poor visual acuity.

• Gemäß einem Ausführungsbeispiel wird der erste Lichtstrahl 1010 derart durch das Umlenkelement 1008 umgelenkt, dass die durch den zweiten Lichtstrahl 1012 repräsentierte erste Bildinformation eine höhere wahrnehmbare Bildschärfe aufweist als die durch den dritten Lichtstrahl 1013 repräsentierte zweite Bildinformation, sodass die Bildinformation mit der größeren Bildschärfe in zumindest demjenigen der beiden Sichtbereiche 1014, 1018 angezeigt wird, in dem das Auge 1016 tatsächlich scharf sehen kann und/oder in beiden Sichtbereichen 1014, 1018 angezeigt wird. Entsprechend wird die Bildinformation mit der geringeren Bildschärfe in zumindest demjenigen der beiden Sichtbereiche 1014, 1018 angezeigt, in dem das Auge 1016 unscharf scharf sieht und/oder in beiden Sichtbereichen 1014, 1018 angezeigt.

A description of further optional exemplary embodiments of the projection device follows 1002 :

• According to one embodiment, the first light beam 1010 such by the deflecting element 1008 that deflected by the second beam of light 1012 the first image information represents a higher perceptible one Has image sharpness than that by the third light beam 1013 represents second image information, so that the image information with the greater image sharpness in at least that of the two viewing areas 1014 , 1018 appears in which the eye 1016 can actually see clearly and / or in both fields of view 1014 , 1018 is shown. The image information with the lower image sharpness is correspondingly in at least that of the two viewing areas 1014 , 1018 displayed in which the eye 1016 looks out of focus and / or in both fields of view 1014 , 1018 displayed.

According to this embodiment is the image generation unit 1004 designed to in addition to the image information representing the first light beam 1010 the further first light beam representing the image information 1011 to generate, with the first beam of light 1010 and the further first ray of light 1011 differ from each other with regard to a wavelength.

According to the in 6 The embodiment shown includes the data glasses 1000 also an optional control unit 1020 for driving the image generation unit 1004 and the micromirror 425 and / or the deflecting element 1008 . To do this, the control unit sends 1020 a corresponding control signal 1022 to the imaging unit 1004 , the imaging unit 1004 is designed to use the control signal 1022 at least the first ray of light 1010 and / or the further first light beam 1011 to create. The control unit 1020 can additionally or alternatively send a control signal to the deflection element 1008 output, the deflecting element 1008 is designed to use the control signal to at least the second light beam 1012 and / or the third light beam 1013 to generate or redirect.

Depending on the embodiment, the image generation unit 1004 and / or the control unit 1020 on a glasses frame of the data glasses 1000 be attached.

According to this embodiment, the deflection element 1008 optionally formed to the first light beam 1010 in the form of the second beam of light 1012 and / or the further first light beam 1011 in the form of the third ray of light 1013 and / or at least one of the image generation unit 1004 generated additional light beam in the form of a further second light beam representing the first image information 1012 to one behind the pupil 430 of the eye 405 arranged point 1025 redirect. According to this embodiment, the deflecting element steers 1008 every second rays of light 1012 to the point 1025 . According to one embodiment, the deflecting element steers 1008 every third rays of light 1013 to the point 1025 . At the point 1025 According to this exemplary embodiment, it is an example of a pivot point of the eye 405 .

The deflection element 1008 is optionally designed according to this embodiment to the first light beam 1010 in the form of the second beam of light 1012 and / or the additional first light beam in the form of the further second light beam 1012 and / or every second light beam 1012 in the form of a collimated second light beam 1012 or in the form of multiple collimated second light beams 1012 redirect. A collimated light beam is to be understood as a non-divergent or hardly divergent light beam, for example at least a laser beam. The deflection element 1008 is optionally designed according to this embodiment to the further first light beam 1011 in the form of the third ray of light 1013 and / or at least one further third light beam 1013 and / or all third light rays 1012 in the form of a divergent third beam of light 1013 or in the form of multiple divergent third light rays 1013 redirect.

The first light beam is only an example 1010 and also the further first ray of light 1011 according to this embodiment in the form of laser beams from the image generation unit 1004 generated. According to an alternative embodiment, the image generation unit generates 1004 just one of the two rays of light 1010 , 1011 , the projection device 1002 may have a further image generation unit which is designed to generate the other of the two light beams 1010 , 1011 to create. The imaging unit 1004 is optionally designed according to this embodiment to the first light beam 1010 and / or the further first light beam 1011 to be generated in such a way that the first image information and / or the second image information represents an at least two-colored, in particular multicolored, image.

The deflecting element comprises merely by way of example 1008 according to this exemplary embodiment, at least one hologram layer which is designed to surround the first light beam 1010 as the second ray of light 1012 redirect. According to one embodiment, the deflecting element 1008 also comprise at least one further hologram layer which is designed to surround the further first light beam representing the or further image information 1011 as the third ray of light 1013 deflect, wherein the further hologram layer can be arranged in a different position than the hologram layer.

• Anders als in 4 und 5 realisiert die hier vorgestellte Projektionsvorrichtung 1002 ein RSD, bei dem der Mikrospiegel 425 nicht auf die Pupille 430, sondern auf den Drehpunkt im Augeninneren abgebildet wird. Auf diese Weise ist nicht mehr das volle Sichtfeld, hier beispielhaft 60°, scharf wahrnehmbar, sondern nur ein Ausschnitt davon, hier beispielhaft 16,7°. Die Größe des sichtbaren Ausschnitts ist dafür allerdings weitgehend unabhängig von Augenbewegungen des Auges 405. Als Resultat kann das Auge 405 das volle Sichtfeld bis zum Rand betrachten. Die Projektionsvorrichtung 1002 kann daher auch als eine AR-Datenbrille mit großem Sichtfeld bezeichnet werden. Im zentralen Sichtfeld wird dem Auge 405 für jeden Blickwinkel eine scharfe Bildinformation angeboten. Zusätzlich wird mittels des dritten Lichtstrahls 1013, hier in Form eines zweiten Lasers, verschiedene aber ähnliche Wellenlänge, der verbleibende Bereich des Sichtfeldes abgedeckt. Dazu wird mittels einer weiteren holografischen Funktion der weitere erste Lichtstrahl 1011, oder zweite Laser, divergent in Richtung des Auges 405 umgelenkt. Dadurch wird erreicht, dass die Laserstrahlen am Auge 405 ausreichend groß sind und die Pupille 430 in jeder Augenstellung innerhalb des beleuchteten Bereichs liegt. Diese mit divergentem Licht geschriebene Bildinformation wird vom Auge 405 als unscharf wahrgenommen. Gemäß diesem Ausführungsbeispiel liegt die Fovea im Zentrum des FOV. Unter Verwendung des kollimierten Lichts ist das FOV für das Auge 405 teilweise sichtbar, hier 16,7°. Unter Verwendung des divergenten Lichts ist das FOV für das Auge 405 komplett sichtbar, hier 60°.

The following are exemplary embodiments of the projection device presented here 1002 described again in other words:

• Unlike in 4th and 5 realizes the projection device presented here 1002 an RSD in which the micromirror 425 not on the pupil 430 , but is mapped to the pivot point inside the eye. In this way, the full field of view, here 60 ° as an example, can no longer be perceived sharply, but only a section of it, here 16.7 ° as an example. The size of the visible section is largely independent of eye movements 405 . As a result, the eye can 405 view the full field of vision up to the edge. The projection device 1002 can therefore also be referred to as AR data glasses with a large field of view. The central field of vision is the eye 405 sharp image information is offered for every viewing angle. In addition, the third light beam 1013 , here in the form of a second laser, different but similar wavelength, the remaining area of the field of view is covered. For this purpose, the further first light beam is generated by means of a further holographic function 1011 , or second laser, divergent towards the eye 405 diverted. This ensures that the laser beams reach the eye 405 are sufficiently large and the pupil 430 is within the illuminated area in every eye position. This image information written with divergent light is perceived by the eye 405 perceived as blurred. According to this exemplary embodiment, the fovea lies in the center of the FOV. Using the collimated light, the FOV is for the eye 405 partially visible, here 16.7 °. Using the divergent light, the FOV is for the eye 405 completely visible, here 60 °.

Compared to a possible so-called “exit pupil expansion”, that is to say an enlargement of the exit pupil through the use of beam expansion optics such as microlens arrays, the projection device presented here requires 1002 advantageously a significantly smaller installation space and the representation in the projection device presented here 1002 is focus free. Compared to a possible so-called “exit pupil replication”, that is, a duplication of the exit pupil, the projection device presented here requires 1002 advantageously no at least three laser sources and holographic functions with slightly different wavelengths per color. This means that significantly lower costs can be achieved. Compared to a possible so-called “exit pupil tracking”, that is to say a tracking of the exit pupil, the projection device presented here requires 1002 advantageously a significantly smaller installation space and no complex tracking mechanism. In contrast to a possible fixation of the exit pupil on the eye pupil, with tracking being made possible by wearing a special contact lens, is the case with the projection device presented here 1002 advantageously no contact lens is necessary. Compared to a possible generation of an array of exit pupils for the central viewing area with a limited field of view in each case by means of a structured HOE (sharp image content due to collimated laser beams) and a simultaneously displayed divergent and thus large exit pupil for the peripheral viewing area (blurred image content due to divergent laser beams) The method uses or requires a so-called “foveated projection”, ie an adaptation of the projection to the resolution of the human eye (high resolution in the central field of vision and low resolution in the periphery) is the case with the projection device presented here 1002 advantageously no complex holographic function is necessary.

Current concepts for AR data glasses generally show a conflict of objectives between the achievable field of view (FOV) and the size of the eyebox on the one hand and the size or complexity of the system, especially the number of laser sources and holographic functions required , on the other hand. The projection device presented here 1002 reduces the required complexity with a larger FOV and larger eyebox at the same time. This reduces the size and any design restrictions.

In comparison to other conceivable implementation options, the projection device presented here enables 1002 a resource-saving, simple system structure (fewer components are required) by utilizing the physiology of the human eye (sharp image content is only displayed where it can be perceived). The projection device 1002 realizes a reduction in the number of required laser sources from three laser sources to two or even just one laser source with monochrome image display and from nine laser sources to six or even only three laser sources with color (RGB) image display. Since every laser source requires a holographic function, a reduction in the number of holographic functions required is accordingly made possible. Separate beam expansion optics, tracking mechanisms and contact lenses are also not required in the projection device 1002 . Despite the resource-saving, simple system structure, the projection device is implemented 1002 at the same time a larger FOV and a larger eyebox. A significantly simplified holographic function, less effort in image data processing and greatly reduced tolerance requirements are made possible. An improvement in functionality is also achieved because the projection device 1002 is designed to produce two eyeboxes that are firstly not spatially separated and secondly differ in their beam divergence.

A core of the approach presented here is a division of the field of vision into two areas, the central field of vision, or ZSB for short, with high visual acuity and the peripheral field of vision, or PSB for short, with low visual acuity. In this way, the image display is adapted to the physiology of the human eye.

The central field of vision: the spatial resolution of the human eye 405 strongly depends on the density of light-sensitive cells on the retina. This is greatest in the center of the field of view and drops off quickly towards the edge (see 3 ). The area on the retina with the highest density of photoreceptor cells, the fovea centralis, has an angle of approximately 5 °.

The peripheral field of vision: Outside the central fovea, the spatial and color resolution of the eye decrease rapidly (see 3 ). In contrast, the time resolution and thus the perceptibility of faster movements in the periphery increase.

To address the ZSB, the projection device 1002 first image projection used in which the laser beams are deflected in such a way that they go towards the pupil 430 of the eye 405 converge. Advantageously according to this embodiment in the pivot point of the eye 405 , that is, inside the eye. In this way, you can no longer see the full field of vision, but only part of it. This section addresses the assembly of the eye. In this way, the size of the visible section is largely independent of eye movements. As a result, the eye can 405 view the full field of vision up to the edge. The laser beams of this first image projection are made using the second light beams 1012 Focused as well as possible on the retina in order to create a sharp image impression.

Stand to the eye 405 only this first image projection is available, so the eye could 405 While perceiving the assembly belonging to this viewing direction sharply for all viewing directions, parts of the image lying outside the assembly would be invisible. This clearly means that the image information disappears as soon as you look at it 405 moves to a different part of the field of view and reappears as soon as you meet the eye 405 moved back. The effect can best be compared to the restricted field of vision when looking through a toilet roll. In order to circumvent this problem, the remaining area of the field of view, the PSB, is projected via a further image projection with its own laser and its own HOE using the third light beams, according to an exemplary embodiment 1013 shown. So that the pupil 430 receives image information from the entire field of view in every eye position, the laser beam is deflected divergent by the HOE. This leads to a blurred perception of the projected image.

7th shows a schematic representation of a projection device 1002 according to an embodiment. This can be the in 6 projection device described 1002 act, with the difference that for the sake of clarity, the third light rays are not shown.

8th shows a schematic representation of a projection device 1002 according to an embodiment. This can be based on 6 or 7th projection device described 1002 act, with the difference that the eye is shown rotated 10 ° to the right. As in the 6 to 7th the fovea (5 °) of the eye is in the center of the field of view. In this way, the field of view is partially visible, here 16.7 ° as an example.

9 shows a schematic representation of a projection device 1002 according to an embodiment. This can be based on 8th projection device described 1002 act, with the difference that the eye is turned another 10 ° (or opposite 7th is shown rotated by 20 °) to the right. The fovea (5 °) of the eye is in the center of the field of vision. In this way, the field of view is partially visible, here 16.7 ° as an example.

10 shows a schematic representation of a projection device 1002 according to an embodiment. This can be based on 9 projection device described 1002 act, with the difference that the eye is turned another 10 ° (or opposite 7th shown rotated by 30 °) to the right. The fovea (5 °) of the eye lies in the edge of the field of vision. In this way, the field of view is partially visible, here 8.4 ° as an example.

11 shows a schematic representation of a projection device 1002 according to an embodiment. This can be one of the in one of the 6 to 10 projection devices described 1002 act, with the difference that the projection device 1002 according to this exemplary embodiment has an eye position determination unit which is designed to determine an eye position of the eye 405 to investigate. According to this exemplary embodiment, the image generation unit is designed to produce the first Generate light beam and / or the further first light beam as a function of the eye position. According to this exemplary embodiment, the deflecting element is designed to generate the second light beam and / or the third light beam as a function of the eye position.

The eye position tracking required for this takes place, for example, directly via an already installed laser scanner as the eye position determination unit. For this purpose, according to one embodiment, at least one of the already installed light sources in the visible wavelength range or also a further light source in the invisible wavelength range, for example in the infrared range, is used. A back measurement takes place, for example, via an optical transmission path, i. H. for example using a micromirror or a suitable detector installed elsewhere in the system. Additionally or alternatively, the eye position determination unit according to an exemplary embodiment comprises a camera for detecting the eye positions.

The determination of the viewing direction, d. H. the eye position can also be done by measuring the fundus. For this purpose, use can be made, for example, of the fact that the fundus of the eye is scanned with a laser beam for the purpose of image generation. If an optical return channel is now provided, an image of the fundus and the blood vessels running therein can be generated. From displacements of this image, as they occur with eye movements, conclusions can be drawn about the eye movement, for example, in a manner similar to that of an optical computer mouse.

In order to avoid a superimposition of sharp and unsharp images in the central field of vision of the eye, it is advantageous if the large eyebox with the unsharp second image information in the assembly of the eye is darkened. Since the assembly moves depending on the position of the eyes, it is necessary to move the darkened area accordingly. The projection device 1002 controlled for example by means of sensor information from the eye position determination unit in the form of an eye tracking system in such a way that the third light beam in the form of the divergent laser beam is in the central field of vision of the eye 405 switched off or dimmed. As the diameter of the pupil 430 and so that the perceived size of the ZSB changes as a function of the ambient brightness, the projection device can 1002 additionally have a sensor which is designed to measure the ambient brightness and, as a function of this, to adapt a size of the blanked area.

According to this exemplary embodiment, the divergent, large eyebox is therefore used for the full field of vision, according to this exemplary embodiment with the exception of the central first field of vision 1014 , used, wherein advantageously no contact lens or other additional optics are necessary for the sharp image display. The projection device presented here 1002 works beneficially with virtually any eye 405 , even if this is actually corrective optics such. B. requires glasses.

The projection device described 1002 can be designed with one color (monochrome), with two colors and the resulting mixed colors or as a full color system (RGB). For each color, two lasers are required, which differ slightly in wavelength. A difference of approx. 20 nm is advantageous.

According to this exemplary embodiment, the third light beam is advantageously in the form of at least one divergent laser beam in the central first field of view 1014 , which is already supplied with sharp image information by the second light beam in the form of at least one collimated laser beam, is switched off. According to this exemplary embodiment, the fovea lies in the center of the FOV. Using the collimated light, the FOV is for the eye 405 partially visible, here 16.7 °. Using the divergent light, the FOV is for the eye 405 peripherally visible, here 60 ° - 16.7 °.

In order to halve the number of laser sources required, it is conceivable that both optical functions, that is to say the sharp and the unsharp projection, are addressed via the same laser according to an exemplary embodiment. In order to minimize loss of contrast, a deflection efficiency of the HOE for the unsharp projection would be designed to be significantly lower in such a case than the efficiency for the sharp projection. Instead of fading out the ZSB, the PSB would be displayed brighter. According to one exemplary embodiment, the image generation unit is designed accordingly to switch off the further first light beam depending on the eye position, for example in the assembly and / or to generate the first light beam more intensely or brighter depending on the eye position, for example in the assembly, and / or the further first light beam depending on the eye position, for example in the PSB to be produced more intensely or brighter.

As by means of the projection device 1002 a laser beam, for example, directly onto the retina of the eye 1016 can be written, it is also possible to create an image or video of the retina by means of the projection device 1002 to create. This is done, for example, by a corresponding back measurement over the optical transmission path. With such a system, for example, the wearer of the data glasses can be identified geometrically on the basis of a vein structure of the retina. It would also be conceivable to determine a pulse rate as a function of the pulsation of the veins running in the retina or oxygen saturation via a color of the blood flowing in the veins.

12th shows a schematic representation of a projection device 1002 according to an embodiment. This can be based on 11 projection device described 1002 act, with the difference that the eye is shown rotated by 20 ° to the right as an example. According to this exemplary embodiment, the fovea lies in the center of the FOV. Using the collimated light, the FOV is partially visible to the eye, here 16.7 °. Using the divergent light, the FOV is peripherally visible to the eye, here 60 ° - 16.7 °.

13th shows a flow chart of a method 1300 for displaying image information by means of a projection device according to an embodiment. This can be one of the projection devices that are based on one of the 6 to 12th has been described.

The procedure 1300 includes one step 1305 of generating and one step 1310 of redirecting.

In step 1305 During the generation, at least the first light beam and / or the further first light beam is generated. In step 1310 of the deflection, the first light beam in the form of the second light beam representing the first image information and / or the further first light beam in the form of the third light beam representing the second image information is deflected into the first field of vision and / or the second field of vision of the eye, the first light beam and / or the further first light beam is deflected in such a way that the second light beam and the third light beam differ in terms of beam divergence and the second field of view and the first field of view at least overlap.

According to one embodiment, step 1310 of deflecting, the second light beam is deflected in such a way that the first image information is displayed or can be displayed within the first viewing area and the second viewing area, and additionally or alternatively the third light beam is deflected such that the second image information is displayed within the second viewing area and the first viewing area or can be displayed.

Before the step 1310 the process of redirecting 1300 also an optional step according to this exemplary embodiment 1315 of deflecting, in which at least the first light beam and / or the further first light beam is deflected.

The method steps presented here can be repeated and carried out in a sequence other than that described.

14th shows a schematic representation of a control device 1020 according to an exemplary embodiment, for example a control device as described above with reference to FIG 6 is described. The control unit 1020 comprises a generating unit 1610 which is designed to the control signal 1022 for controlling the image generation unit.

Depending on the embodiment, the control unit is 1020 realized as an external unit or as a unit integrated into the image generation unit.

If an exemplary embodiment comprises an “and / or” link between a first feature and a second feature, this is to be read in such a way that the exemplary embodiment according to one embodiment has both the first feature and the second feature and, according to a further embodiment, either only the has the first feature or only the second feature.

Claims (15)

Projection device (1002) for data glasses (1000), the projection device (1002) having the following features: an image generation unit (1004) for generating at least one first light beam (1010) representing image information and / or a further first light beam (1011) representing the image information; and At least one deflection element (1008) which is designed to divert the first light beam (1010) in the form of a second light beam (1012) representing first image information and / or the further first light beam (1011) in the form of a third light beam (1011) representing second image information ( 1013) into a first viewing area (1014) and / or a second viewing area (1018) of an eye (405), the second light beam (1012) and the third light beam (1013) differing in terms of beam divergence and wherein the second viewing area ( 1018) and the first viewing area (1014) at least overlap. Projection device (1002) according to Claim 1 , characterized in that the deflecting element (1008) is designed to the first Divert image information into the first viewing area (1014) and / or the second viewing area (1018) and the second image information into the first viewing area (1014) and / or second viewing area (1018), the second viewing area (1018) and the first viewing area ( 1014) are arranged congruently. Projection device (1002) according to one of the preceding claims, characterized in that the deflecting element (1008) is designed to deflect the first light beam (1010) in such a way that the first image information has a higher perceived image sharpness than the second image information, the deflecting element ( 1008) is designed to display the first image information and / or the second image information within a central viewing area of the eye (405) as the first viewing area (1014) and / or within a peripheral viewing area of the eye (405) as the second viewing area (1018) to represent. Projection device (1002) according to one of the preceding claims, characterized in that the deflecting element (1008) is designed to deflect the first light beam (1010) in the form of the second light beam (1012) representing the first image information and / or at least the further first light beam ( 1011) in the form of the third light beam (1013) representing the second image information to a point (1025) arranged behind a pupil (430) of the eye (405). Projection device (1002) according to Claim 4 , characterized in that the deflecting element (1008) is designed to send the first light beam (1010) in the form of the second light beam (1012) and / or the further first light beam (1011) in the form of the third light beam (1013) to the point ( 1025), which represents a pivot point of the eye (405). Projection device (1002) according to one of the preceding claims, characterized in that the deflecting element (1008) comprises at least one hologram layer for deflecting the first light beam (1010), in particular wherein the deflecting element (1008) comprises at least one further hologram layer for deflecting the further one representing the image information first light beam (1011), wherein the further hologram layer is arranged in a different position than the hologram layer. Projection device (1002) according to one of the preceding claims, characterized by a spectacle lens (1006), the deflecting element (1008) being implemented as part of the spectacle lens (1006), in particular cast and / or laminated, and / or onto the spectacle lens (1006) is upset. Projection device (1002) according to Claim 7 , characterized in that the deflecting element (1008) extends over at least a major portion of a surface of the spectacle lens (1006). Projection device (1002) according to one of the preceding claims, characterized by an eye position determining unit for determining an eye position of the eye (405), the image generating unit (1004) being designed to generate the first light beam (1010) and / or the further first light beam (1011) to be generated depending on the eye position and / or the deflecting element (1008) be designed to deflect the second light beam (1012) and / or the third light beam (1013) depending on the eye position and / or wherein the eye position determination unit is designed to determine the eye position using a laser. Projection device (1002) according to Claim 9 , characterized in that the eye position determination unit is designed to determine the eye position using an infrared light. Projection device (1002) according to one of the preceding claims, characterized in that the image generation unit (1004) is designed to generate the first light beam (1010) and / or the further first light beam (1011) in such a way that the first image information and / or the second image information represents an at least two-colored, in particular multicolored image. Method (1300) for displaying image information by means of a projection device (1002) according to one of the preceding claims, wherein the method (1300) comprises the following steps: Generating (1305) at least the first light beam (1010) and / or the further first light beam (1011); and Deflecting (1310) the first light beam (1010) in the form of the second light beam (1012) representing the first image information and / or the further first light beam (1011) in the form of the third light beam (1013) representing the second image information into a first viewing area (1014 ) and / or a second field of vision (1018) of the eye (405), the first light beam (1010) and / or the further first light beam (1011) being deflected in such a way that the second light beam (1012) and the third light beam ( 1013) differ in terms of beam divergence and wherein the second field of view (1018) and the first field of view (1014) at least overlap. Control device (1020) with a unit (1610) which is designed to perform the method (1300) according to Claim 12 execute and / or control. Computer program which is designed to carry out the method (1300) according to Claim 12 execute and / or control. Machine-readable storage medium on which the computer program is based Claim 14 is stored.

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