Light emitting device, light source, and adaptive driving beam headlights

Abstract

The present disclosure relates to a light emitting device (100) comprising a pixel unit (102) having an array (105) of light emitting pixels (110), wherein each light emitting pixel (110) is separately controllable to emit light, and a memory (120) for storing a plurality of pixel control data. Here, the pixel unit (102) is configured to retrieve pixel control data from the memory (120) to control light emission of the light emitting pixels (110).

Description

[0001] LIGHT EMITTING DEVICE, LIGHT SOURCE, AND ADAPTIVE DRIVING BEAM HEADLIGHTS

[0002] The present disclosure relates to a light emitting device, a light source, and adaptive driving beam headlights used in a car.

[0003] Adaptive driving beam, ADB, headlights that are used for example as car headlights allow to adaptively adjust the light emission within the field of view of the headlights such as to avoid e.g. blinding of oncoming traffic, while still illuminating the road.

[0004] Driving a high resolution ADB headlights system requires in principle a high frequency video interface to ensure the necessary bandwidth. However, only a low bandwidth interface may be provided in an already existing car platform. Thus, for equipping such a car, reduction of the bandwidth, i.e. the data processing and transmission rates, towards the light emitting device used in the ADB headlights is necessary. Moreover, reduced bandwidth would also allow to use less cost intensive components and makes compliance with electromagnetic interference, EMI, regulations easier. Thus, reducing the bandwidth also allows manufacturing of less expensive light emitting devices that can be used e.g. in ADB headlights.

[0005] It is an objective of the present invention to provide an improved light emitting device, an improved light source, and an improved ADB headlight.

[0006] According to embodiments, the above object is achieved by the claimed matter according to the independent claims. Further developments are defined in the dependent claims.

[0007] Embodiments relate to a light emitting device comprising a pixel unit having an array of light emitting pixels, wherein each light emitting pixel is separately controllable to emit light, and a memory for storing a plurality of pixel control data. Here, the pixel unit is configured to retrieve pixel control data from the memory to control light emission of the light emitting pixels. The array of light emitting pixels and the memory may be placed on a single circuit board.

[0008] The pixel unit may be configured to retrieve pixel control data with a rate that is higher than or equal to 30 / s, 60 / s, 90 / s, or 120 / s.

[0009] The number of different pixel control data stored by the memory may be larger than or equal to 10, 50, 100, 500, 1 ,000, or 2,000.

[0010] The pixel unit may be configured to generate additional pixel control data from the pixel control data stored on the memory and, preferably, to store the additional pixel control data in the memory.

[0011] At least a part of the plurality of pixel control data may be configured to control each of the light emitting pixels separately by providing for each light emitting pixel a pixel value that controls light emission intensity of the respective light emitting pixel. Additionally or alternatively at least a part of the plurality of pixel control data may be configured to control the light emitting pixels in groups of adjacent light emitting pixels by providing for each group one pixel value that controls the light emission intensity of all light emitting pixels in the respective group.

[0012] The light emitting device may further comprise a control unit for providing the pixel unit with a selection control signal, wherein the pixel unit is configured to retrieve the pixel control data based on the selection control signal.

[0013] The selection control signal may have a size that is smaller than 2 bits, 10 bits, 20 bits, 50 bits, or 100 bits.

[0014] A connection between the control unit and the pixel unit may have a bandwidth of less than or equal to 2 kb / s, 10 kb / s, 100 kb / s, 500 kb / s, 1 Mb / s, 2 Mb / s, or 5 Mb / s.

[0015] The pixel unit may be configured to use the last retrieved pixel control data for controlling the light emitting pixels and to only retrieve pixel control data from the memory if a selection control signal is provided from the control unit. The selection control signal may indicate a series of pixel control data that is to be retrieved consecutively and the pixel unit may be configured to reiterate retrieval of the series of pixel control data as long as no new selection control signal is provided from the control unit.

[0016] The light emitting device may further comprise a receiving unit that is configured to receive image data and / or video data of a field of view that is illuminated by the light emitting pixels, wherein the control unit is configured to generate the selection control signals based on received image data or video data.

[0017] A light source for adaptively illuminating a field of view may comprise a light emitting device as described above and optics that focusses the light emitted by the light emitting pixels onto the field of view.

[0018] Adaptive driving beam headlights may comprise a light source as described above.

[0019] A car may comprise the adaptive driving beam headlights as described above, wherein the pixel unit is configured to retrieve pixel control such as to avoid blinding of oncoming traffic and / or to project messages to a driver of the car into the field of view of the light source.

[0020] BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification. The drawings illustrate the embodiments of the present invention and together with the description serve to explain the principles. Other embodiments of the invention and many of the intended advantages will be readily appreciated, as they become better understood by reference to the following detailed description.

[0022] The elements of the drawings are not necessarily to scale relative to each other. Like reference numbers designate corresponding similar parts.

[0023] Fig. 1 is a schematic illustration of a light emitting device. Fig. 2 is a schematic illustration of a light source comprising a light emitting device.

[0024] Fig. 3 is a schematic illustration of a car using adaptive driving beam headlights comprising a light emitting device.

[0025] DETAILED DESCRIPTION

[0026] In the following detailed description reference is made to the accompanying drawings, which form a part hereof and in which are illustrated by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology such as "top", "bottom", "front", "back", "over", "on", "above", "leading", "trailing" etc. is used with reference to the orientation of the Figures being described. Since components of embodiments of the invention can be positioned in a number of different orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope defined by the claims.

[0027] The description of the embodiments is not limiting. In particular, elements of the embodiments described hereinafter may be combined with elements of different embodiments.

[0028] Fig. 1 is a schematic illustration of a light emitting device 100 that is configured to emit light into a certain solid angle, also called field of view of the light emitting device 100. The light emitting device 100 comprises at least a pixel unit 102 and a memory 120.

[0029] The pixel unit 102 is the light emitting part of the light emitting device 100. It comprises an array 105 of light emitting pixels 110, wherein each light emitting pixel 110 is separately controllable to emit light. The light emitting pixels 110 are two- dimensionally arranged in the array 105. As shown in Fig. 1 the pixels 110 may be regularly arranged and form e.g. rows and columns of a two-dimensional matrix. However, the pixels 110 may also be arranged non-regularly. For example, the pixels 110 may have different densities in different areas of the array. The pixels 110 may also be arranged along a straight or curved line or such as to form a certain pattern.

[0030] Thus, the arrangement of the pixels 110 is arbitrary.

[0031] Each of the pixels 110 is configured to emit light independent of light emission by the other pixels 110. Thus, each pixel 110 is separately controllable to emit light.

[0032] Preferably, the pixels 110 are LEDs or laser diodes. However, the pixels 110 may in principle also be constituted by any light emitter, such as a plurality of incandescent lamps or halogen lamps. The light emitted by the pixels 110 is preferably visible light and most preferably white light. However, the pixels 110 may in principle also emit infrared or ultraviolet light. In principle, the structure of the light emitting pixels 110 and of the pixel unit 102 is known and a more detailed description thereof can be omitted here.

[0033] By being separately controllable, the light emitting pixels 110 can illuminate the field of view of the light emitting device 100 in an adaptive manner, i.e. within the field of view regions of high illumination and regions of low or no illumination can be defined and dynamically changed.

[0034] To this end, the pixel unit 102 is provided with pixel control data that determine at least whether to turn on or off a pixel 110 or that determine the amount of light emitted by a pixel 110. Moreover, the pixel control data may also indicate a wavelength (spectrum) to be emitted by the respective pixel 110.

[0035] The pixel control data are typically provided to the pixel unit 102 in a frame-based manner. This means that pixel control data for all pixel 110, i.e. for one frame, are provided at predetermined points in time with a given rate. For example, the pixel unit 102 may obtain pixel control data with a rate (or frame rate) that is higher than or equal to 30 / s, 60 / s, or 90 / s. This allows a frequent adaption of the illumination strength of different parts of the field of view of the light emitting device 100.

[0036] Thus, the pixel control data can be configured to control each of the light emitting pixels 110 separately by providing for each light emitting pixel 110 a pixel value that controls light emission intensity of the respective light emitting pixel 110. Each set of pixel control data can then be considered as an “image” having a resolution corresponding to the pixel resolution. This allows adaption of the illumination strength of the field of view with high resolution. Driving of the pixels 110 of the pixel unit 102 is performed as in principle known, e.g. by pixel driver circuitry 103 provided in the pixel unit 102.

[0037] Additionally or alternatively, pixel control data can be used that is configured to control the light emitting pixels 110 in groups 115 of adjacent light emitting pixels 110 by providing for each group 115 one pixel value that controls the light emission intensity of all light emitting pixels 110 in the respective group 115. This means that adjacent pixels 110 within one group 115 will all have the same light emission intensity. In this manner the bandwidth for providing and / or the memory space for storing the pixel control data can be reduced. This allows to reduce the manufacturing costs of the light emitting device 100, since less expensive components for data transmission and data storage can be used.

[0038] The pixel control data for driving the pixel unit 102 are stored on the memory 120, from which the pixel unit 102 retrieves the pixel control data to control light emission of the pixels 110. This means that the pixel control data are not provided from an external device, like e.g. a control system such as an electronic control unit, ECU, of a car in which the light emitting device 100 is used. In contrast, the pixel unit 102 retrieves the pixel control data from the memory 120 provided together with the pixel unit 102 in the same light emitting device 100. Preferably, as shown in Fig. 1 the array 105 of light emitting pixels 110 and the memory 120 are placed on a single circuit board 150 or at neighboring circuit boards within the light emitting device 100 or are at least contained in the same housing.

[0039] In this manner, it is ensured that due to the short distances of data transmission, e.g. on the same circuit board 150 or chip, high bandwidth transmission paths can be provided more easily and for less costs than in the case where the pixel control data are provided with high frame rates from an external device. It is therefore possible for the pixel unit 102 to retrieve the pixel control data with high retrieval / frame rates and with low latency to adapt the illumination strength within the field of view of the light emitting device 100. The memory 120 can be any memory that is capable to store the pixel control data. For example, the memory 120 may be a non-volatile memory such as a read-only memory. This allows defining and storing a predetermined number of “images” of pixel illumination as the pixel control data during manufacturing of the light emitting device 100 from which the pixel unit 102 retrieves the pixel illumination image appropriate at the moment. For example, the number of different pixel control data stored by the memory 120 may be larger than or equal to 10, 50, 100, 500, 1 ,000, or 2,000. This allows a selection among a large number of illumination patterns without the necessity to keep large amounts of processing power ready.

[0040] However, it might also be possible to use a volatile memory in a setup in which the necessary images can be computed in real-time by an (external) processor or the like and stored into the memory 120 before retrieval from the pixel unit 102. This enhances the flexibility of adapting the illumination pattern, since the stored pixel control data can be freely adapted.

[0041] Irrespective of which memory type is used, the “images” constituting the pixel control data may be stored in a compressed or an uncompressed format. Here, an uncompressed format allows a higher resolution, but comes at the cost of the necessity to use a larger memory. Thus, using a compressed format will usually reduce manufacturing costs.

[0042] Additionally to only using the pixel control data stored on the memory 120, the pixel unit 102 may also generate additional pixel control data from the pixel control data stored on the memory 120, e.g. by a processor provided in the pixel unit 102. In particular, the pixel control data may comprise a set of “base images”, which define light emission for all pixels 110 and sets of “change images” which define deviations from the base images as appropriate to reach the desired illumination pattern. The pixel values in the change images can then be added or subtracted from the pixel values of the base images in order to reach a desired image.

[0043] For example, when using the light emitting device 100 in the headlamps of a car, a base image may define road illumination without oncoming traffic. Change images may then define a reduction of the illumination strength the regions of the field of view in which an oncoming car is located. Change images may also define warning messages that can be projected onto the road by the light emitting device 100, such as e.g. a warning that the road is slippery or icy.

[0044] The change images contain less information than the base images. In fact, change image will only refer to pixel locations in which changes to a base image are made and will contain pixel value information only for those pixels 110, but not for all pixels 110, as is the case for base images. Thus, using base images and change images reduces the necessary size of the memory 120.

[0045] The pixel unit 102 may further be configured to not only generate the additional pixel control data, but also to store the additional pixel control data in the memory 120. In this manner, if memory area permits, the pixel unit 102 can generate its own library of pixel control data from an initial set of pixel control data. This reduces the computations necessary to adapt base images to the presently desired illumination patterns if these illumination patterns are demanded frequently.

[0046] As illustrated in Fig. 1 the light emitting device 100 may further comprise a control unit 130 for providing the pixel unit 102 with a selection control signal based on which the pixel unit 102 retrieves the pixel control data.

[0047] The control unit 130 may be located externally to the pixel unit 102 and the memory 120. The control unit 130 may for example be part of a control system controlling more than only the light emitting device 100, such as e.g. the ECU of a car. The control unit 130 may in principle also be located remotely at a server or a server farm. However, the control unit 130 may also be included in the same housing as the pixel unit 102 and the memory 120. It may, for example, be located on the same circuit board 150 as the pixel unit 102 and the memory unit 120 and may be connected to the memory 120, or it may be located on a circuit board next to the circuit board 150 of the pixel unit 102. In this case, the locally provided control unit 130 may carry out its actions under control of an externally provided control system. Further, a locally provided control unit 130 may execute any computing tasks of the pixel unit 102 or may be a control unit of the pixel unit 102. The control unit 130 may be a component of a general purpose processor or may be constituted by a general purpose processor. It may be constituted by a CPU, a GPU or any circuitry that is capable to carry out the functions described above. These functions may be hardware implemented, software based or executed by a mixture of hardware and software.

[0048] The selection control signals that are necessary to indicate to the pixel unit 102 which of the pixel control data to select are small in comparison to the size of the pixel control data. For example, using a pixel array of 320 x 80 = 25,600 pixels and 8 bit pixel values to control the illumination strengths of the pixels leads to pixel control data of at least 204,800 bits. On the other hand, the size of the selection control signal may be smaller than or equal to 2 bits, 10 bits, 20 bits, 50 bits, or 100 bits. For example, the control unit 130 and the pixel unit 102 may have stored a lookup table referencing each of the pixel control data stored in the memory 120 with an identifier. Then, instead of sending the respective pixel control data it is sufficient to send the identifier from the control unit 130 to the pixel unit 102 to trigger the retrieval of the pixel control data.

[0049] Thus, much less bandwidth has to be kept ready for the reception of the selection control signals at the light emitting device 100 / the pixel unit 102 compared to the case where the full pixel control data are to be received from an external source. For example, a connection between the control unit 130 and the pixel unit 102 may have a bandwidth of less than or equal to 2 kb / s, 10 kb / s, 100 kb / s, 500 kb / s, 1 Mb / s, 2 Mb / s, or 5 Mb / s.

[0050] The necessity to provide only a low bandwidth interface allows using less expensive components for the interface of the light emitting device 100 with an external control system or for the interface of the pixel unit 102 and the control unit 130. In addition, it allows to use the light emitting device 100 also in existing illumination systems that only use connections with comparably small bandwidths such as CAN busses. Finally, limiting high bandwidth data transmissions to short distances such as the distance between the pixel unit 102 and the memory 120 reduced the amount of electromagnetic radiation, which eases to match EMI regulations. To further reduce the necessary bandwidth, the pixel unit 102 may use the last retrieved pixel control data for controlling the light emitting pixels 110 and retrieves pixel control data from the memory 120 only if a selection control signal is provided from the control unit 130. This means that without a new selection control signal the illumination pattern will be used that is dictated by the last pixel control data that were retrieved by the pixel unit 102 after reception of the last selection control signal. Thus, without the necessity to update the used illumination pattern, there is no necessity for data transmission to the pixel unit 102.

[0051] Further, selection control signals may not only indicate single pixel control data but may also indicate a series of pixel control data that is to be retrieved consecutively. This means on the one hand that by receiving a single selection control signal a number of pixel control data, and hence a number of consecutive illumination patterns are signaled. This allows for a smaller rate of selection control signal transmission than the rate of adaption of the illumination pattern and allows thus a further bandwidth reduction for the provision of the selection control signals.

[0052] On the other hand, the pixel unit 102 may be configured to reiterate retrieval of the series of pixel control data as long as no new selection control signal is provided from the control unit 130. Thus, if looping through the illumination patterns dictated by the last obtained selection control signal is sufficient, it is not necessary to send a new selection control signal. This can reduce the rate of selection control signal transmission and hence the necessary bandwidth even further.

[0053] As illustrated in Fig. 1 , the light emitting device 100 may further comprise a receiving unit 140. The receiving unit 140 is used to receive image data and / or video data of the field of view illuminated by the light emitting pixels 110. The control unit 130 may generate the selection control signals based on received image data or video data.

[0054] This means that the control unit 130 is able to process the incoming image / video data such as to recognize which regions of the field of view need to be illuminated brightly and for which no illumination or only a reduced brightness should be applied. For example, if the light emitting device 100 is used in headlights or a flashlight, brightness could be reduced in the direction to the face of a human in order to avoid blinding. If the light emitting device is used as a photoflash or for illumination of a scene, brightness could be reduced in the direction of highly reflective surfaces to reduce specular reflexes. Brightness could be increased in regions of particular interest, e.g. in the direction of the roadside in the headlights example, or in the direction of an interesting object in the example of illuminating a scene.

[0055] Accordingly, the control unit 130 and / or a control system that is connected to the control unit 130 can evaluate the surroundings of the light emitting device 100 in order to provide a selection control signal that dictates the pixel unit 102 to retrieve appropriate pixel control data. In this manner adaption of the illumination pattern to the environment can be achieved.

[0056] Fig. 2 shows an implementation of a light emitting device 100 within a light source 200 that is configured to adaptively illuminate a field of view by using the abovedescribed functions of the light emitting device 100. In particular, the light source projects the light emitted from the light emitting pixels 110 through optics 210 to focus it onto the field of view. When implementing the light emitting device 100 in such a light source 200, the above references to the field of view of the light emitting device 100 are to be understood as references to the field of view of the light source 200. This means, the control unit 120 operates on images / videos of the field of view of the light source 200 as received by the receiving unit 140.

[0057] The light source 200 may further comprise or may be connected to an imaging device which constitutes the receiving unit 140. The implementation of this imaging device is in principle arbitrary. Any imaging device can be used that is capable to provide image / video data to the control unit 130 with a sufficiently high frame rate (e.g. 60 frames per second).

[0058] The imaging device may also be an external unit that is not part of the light source 200 but provides data to the light source 200 / the control unit 130. For example, the imaging device may be part of a car electronic system. In particular, the imaging device may be placed on or within a driving mirror and provides imaging data to a central control unit of the car electronic system. The control unit 130 is configured to determine, based on the images and / or videos captured by the imaging device, regions in the field of view that shall not be illuminated and / or regions that are to be illuminated at reduced intensity, and is configured to generate the selection control signals based thereon.

[0059] Thus, as described above, due to the functions of the light emitting device 100 the light source 200 can adaptively illuminate a scene, in particular based on the images / video from the imaging device.

[0060] The light source may in particular be or be included into adaptive driving beam, ADB headlights 300. In such headlights the control unit 130, and - if present - the receiving unit 140 may be implemented by a service interface that can also be used for diagnosis of the headlights 300. In particular, it is not necessary that the ADB headlights use or comprise a video interface that is configured to provide and / or process video data with a high bandwidth of 20 Mbit / s needed for high resolutions of e.g. 320x80 pixels. In fact, by using the memory 120 and the selection control signals to control the light emitting pixels 110, the necessary bandwidth can be reduced such that communication via the service interface (bandwidth in the range of 1 Mbit / s to 2 Mbit / s but fundamentally below 5 Mbit / s available for lower bandwidth CAN-FD transceivers) is sufficient.

[0061] This simplifies the ADB headlights and make it compatible with cars that do not comprise a high bandwidth video interface.

[0062] As shown in Fig. 3 a car 400 may comprise the ADB headlights 300 as described above. Then, the control unit 120 provides selection control signals that trigger selection of pixel control data that avoid blinding of oncoming traffic and / or to project messages to a driver of the car 400 into the field of view of the light source. An accordingly equipped car 400 enhances therefore road safety.

[0063] While embodiments of the invention have been described above, it is obvious that further embodiments may be implemented. For example, further embodiments may comprise any subcombination of features recited in the claims or any subcombination of elements described in the examples given above. Accordingly, this spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.

[0064] In particular, the virtual pixels may only be realized on the signal processing and silicon side, where on the other side the light emitting pixels may be executed in reality in the size of those virtual pixels on the silicon side. This creates also benefits of higher efficiency with coarser light emitting pixels but does not require new silicon designs at the same time.

[0065] LIST OF REFERENCES

[0066] 100 Light emitting device

[0067] 102 Pixel unit 103 Pixel driver circuitry

[0068] 105 Array of light emitting pixels

[0069] 110 Light emitting pixels

[0070] 115 Group of pixels

[0071] 120 Memory 130 Control unit

[0072] 140 Receiving unit

[0073] 150 Circuit board

[0074] 200 Light source

[0075] 210 Optics 300 Adaptive driving beam headlights

[0076] 400 Car

Claims

CLAIMS1 . A light emitting device (100) comprising: a pixel unit (102) having an array (105) of light emitting pixels (110), wherein each light emitting pixel (110) is separately controllable to emit light; a memory (120) for storing a plurality of pixel control data; wherein the pixel unit (102) is configured to retrieve pixel control data from the memory (120) to control light emission of the light emitting pixels (110).

2. The light emitting device (100) according to claim 1 , wherein the array (105) of light emitting pixels (110) and the memory (120) are placed on a single circuit board (150).

3. The light emitting device (100) according to anyone of the preceding claims, wherein the pixel unit (102) is configured to retrieve pixel control data with a rate that is higher than or equal to 30 / s, 60 / s, 90 / s, or 120 / s.

4. The light emitting device (100) according to anyone of the preceding claims, wherein the number of different pixel control data stored by the memory (120) is larger than or equal to 10, 50, 100, 500, 1 ,000, or 2,000.

5. The light emitting device (100) according to anyone of the preceding claims, wherein the pixel unit (102) is configured to generate additional pixel control data from the pixel control data stored on the memory (120); and preferably, the pixel unit (102) is configured to store the additional pixel control data in the memory (120).

6. The light emitting device (100) according to anyone of the preceding claims, wherein at least a part of the plurality of pixel control data is configured to control each of the light emitting pixels (110) separately by providing for each light emittingpixel (110) a pixel value that controls light emission intensity of the respective light emitting pixel (110); and / or at least a part of the plurality of pixel control data is configured to control the light emitting pixels (110) in groups (115) of adjacent light emitting pixels (110) by providing for each group (115) one pixel value that controls the light emission intensity of all light emitting pixels (110) in the respective group (115).

7. The light emitting device (100) according to anyone of the preceding claims, further comprising a control unit (130) for providing the pixel unit (102) with a selection control signal; wherein the pixel unit (102) is configured to retrieve the pixel control data based on the selection control signal.

8. The light emitting device (100) according to claim 7, wherein the selection control signal has a size that is smaller than or equal to 2 bits, 10 bits, 20 bits, 50 bits, or 100 bits.

9. The light emitting device (100) according to claim 7 or 8, wherein a connection between the control unit (130) and the pixel unit (102) has a bandwidth of less than or equal to 2 kb / s, 10 kb / s, 100 kb / s, 500 kb / s, 1 Mb / s, 2 Mb / s, or 5 Mb / s.

10. The light emitting device (100) according to anyone of claims 7 to 9, wherein the pixel unit (102) is configured to use the last retrieved pixel control data for controlling the light emitting pixels (110) and to only retrieve pixel control data from the memory (120) if a selection control signal is provided from the control unit (130).11 . The light emitting device (100) according to anyone of claims 7 to 9, wherein the selection control signal indicates a series of pixel control data that is to be retrieved consecutively; andthe pixel unit (102) is configured to reiterate retrieval of the series of pixel control data as long as no new selection control signal is provided from the control unit (130).

12. The light emitting device (100) according to anyone of claims 7 to 11 , further comprising a receiving unit (140) that is configured to receive image data and / or video data of a field of view that is illuminated by the light emitting pixels (110); wherein the control unit (130) is configured to generate the selection control signals based on received image data or video data.

13. A light source (200) for adaptively illuminating a field of view, the light source (200) comprising: a light emitting device (100) according to anyone of the preceding claims; and optics (210) that focusses the light emitted by the light emitting pixels (110) onto the field of view.

14. Adaptive driving beam headlights (300) comprising a light source (200) according to claim 13.

15. A car (400) comprising the adaptive driving beam headlights (300) according to claim 14, wherein the pixel unit is configured to retrieve pixel control such as to avoid blinding of oncoming traffic and / or to project messages to a driver of the car (400) into the field of view of the light source.

Images