Device and system for projection and / or lighting, method of controlling projection and / or lighting

Abstract

The projection and / or illumination device (1) has multiple separate light sources (2) arranged on a surface inside the casing (3), whereby the light sources (2) have separate control. The device (1) has an optical element (4) for projecting the radiating elements of the light sources (2) onto the projection surface (5), preferably using a single connecting lens to display all the light sources (2) from a common carrier (22). The light source (2) is an LED diode (23), preferably with a luminosity of more than 5 Cd and a transverse dimension of up to 8 mm. The diameter of the optical element (4) is equal to or greater than the diagonal of the matrix with the light sources (2). The devices (1) are positioned above the projection surface (5) with a spacing from each other such that their projection fields are closely adjacent. The devices (1) are connected to a control center (6). The desired image shape is placed in the plan view of the projection surface (5) with sectors (7). The displayed pixels are assigned to the respective sector (7) and subsequently assigned to the positions of the light source (2) in the device (1).

Description

[0001] DEVICE AND SYSTEM FOR PROJECTION AND / OR LIGHTING, METHOD OF CONTROLLING PROJECTION AND / OR LIGHTING

[0002] Field of technology

[0003] The invention concerns a device for projection and / or lighting, in particular for projection of static or dynamic images onto the floor in halls, warehouses, gyms and so on. The device may be part of a system with central projection control of multiple devices and it may also be used for lighting spaces, whereby the device will be usually located above the floor and / or below the ceiling.

[0004] Prior state of the art

[0005] LED light sources are commonly used for lighting spaces, which can be centrally controlled according to the required lighting conditions in the relevant part of the building or hall. Technical solutions are also known that allow the projection of various static images, using a sufficiently powerful light source, a fixed or controlled shade or a controlled mirror with a pattern and an optical system that projects rays with a shape according to the pattern on the shade or mirror. The image can have the shape of a company logo or the shape of an arrow for the direction of movement, and so on. Such devices are a simplified version of projection devices.

[0006] Known solutions for projecting images onto a projection surface are demanding on the performance of the lighting system and have energy losses caused by shielding of the part of the light output. This leads to energy losses and also to an increase in the required light source power to levels that are structurally and financially demanding.

[0007] Publication US11138886B1 describes a system for illuminating a path for pedestrians or cyclists, where lights are pre-activated in the respective direction of the path. A lighting guidance system according to document US10573179B2 in a parking lot or garage includes a control of a LED light board to create a guiding light pattern, thereby guiding the vehicle to a free parking space. The light board selectively creates a path pattern for the vehicle, where unlit parts of the parking lot or garage space represent the wrong direction of the planned travel. Selective switching of lights on and off to mark an escape route is described in document KR20170010346A. A display panel with a matrix of LED diodes is known, for example, from the document TW200936945A, where a panel for displaying various symbols, such as arrows, directional signs and so on, is described. The display is only perceptible directly on the panels, it is not projected onto another surface. The display of images on the floor or wall using a projector is described in the publication KR101627228B1 , the dynamics of the movement of the projected arrow are ensured by rotating the entire device in the direction of movement of the person, which, however, requires mechanically movable parts. The projection of a fixed template is also described in the publications KR20100132156A, KR20140070940A, the projection of a rotating template is illustrated in the document KR20190020477A.

[0008] Publication CN201407596Y describes a matrix with a group of LEDs, where each LED has its own lens to emit a rectangular light spot. Without a common optical element, individual LEDs are not projected onto the floor next to each other, but the device emits light where all LEDs illuminate one rectangular area multiple times, thereby achieving the high brightness required in this publication.

[0009] So-called GOBO projectors (graphical optical blackout), which have an optical system of multiple lenses and a screen with multiple images for sharp projection onto the projection surface, are also known. These projectors are particularly useful when the total area where the image is to be projected is small. A disproportionately large number of projectors with high power consumption would be required, to cover larger areas.

[0010] A simple invention for projecting images onto the floor in halls and similar spaces is desired and not known, whereby the device should be structurally and operationally simple and should be energy-efficient.

[0011] Essence of the invention

[0012] The deficiencies in the prior art are significantly remedied by a projection and / or lighting device that includes a plurality of separate light sources arranged on a surface in the body of the device, whereby the light sources have separate control according to the this invention, the essence of which lies in the fact that the device includes an optical element for projecting light, where the optical element is adapted to project the light source elements of the light sources onto a projection surface outside the device body.

[0013] The optical element for projecting light is connected in such a way that it projects the light radiating from multiple light source elements, usually projects the light radiating from all light source elements that are in the respective body of the device. The optical element is common to several, preferably all separate light sources. In this case, the optical element is adapted and adjusted in such a way that it projects the individual light sources from a common surface onto a projection surface next to each other, as the light sources are arranged on the surface in the body of the device. This achieves mutual projection of the separate or adjacent light sources, whereby when using a single optical element, this projection can be inverted or mirror-inverted, respectively.

[0014] The image on the projection surface will be significantly larger than the size of the area on which the light sources are arranged inside the device. Usually, this image will be more than 10 times larger, preferably more than 20 times larger. The device does not mix the light flows from the individual light sources, but these separate light flows are projected through the optical element into separate parts of the projection onto the projection surface. The result is a projection that corresponds to the enlargement of the matrix with light sources depending on how the respective sources are turned on.

[0015] The light sources may be separated by being placed on a common carrier, for example on a board (preferably a PCB), but each light source is capable of emitting light essentially without affecting the ability of the adjacent light source to do so. The term "separate" light source refers to an arrangement in which the illuminating light source does not essentially shine through into the field of adjacent or other light sources. If the light sources have diffusers or similar elements for diffusing light, these diffusers or elements must be limited in their function to only the area corresponding to the respective light source on the carrier. A light diffuser that is separate for each light source does not constitute an optical element for joint projection. It is suitable if the light sources are regularly distributed on the common carrier, and they may form a matrix with a rectangular boundary. The carrier may be in the form of a flat plate or may have a cylindrical curvature or a spherical curvature or other curvature, which may correct some optical deformations according to the characteristics of the optical element used. Any curvature of the surface with light sources represents a deliberate deviation of the position of the light source from the plane in which the object plane of the optical element is located. The separation and number of light sources determine the distinguishing characteristic of the device, where one pixel in the image on the projection surface is formed by one light source in the body of the device.

[0016] The light source is preferably a LED diode, especially preferably a high- luminance LED diode. The LED diode has relatively small dimensions, which allows the creation of a compact carrier with a high number of separate light sources. For the purposes of this document, a high-luminance LED diode can be considered a LED diode with a luminance of more than 5 Cd, preferably at least 10 Cd. The transverse dimension of the LED diode will be up to 8 mm, preferably up to 5 mm, which essentially determines the basic raster of the carrier. The transverse dimension of the LED diode and the selected number of light sources will determine the planar dimension of the device body and also determine the size of the area from which it is necessary to transmit light to the area outside the body of the device by means of an optical element.

[0017] The term “projection surface outside the body of the device”, i.e. the surface onto which the image is projected, primarily refers to the floor, but the projection surface can also have another position or function. In general, there will be a relationship between the characteristics of the projection surface and the required power of a single light source. The goal is to achieve sufficient contrast of the pixel that is part of the image compared to the surrounding projection surface, the illumination of which depends on the specific installation location.

[0018] The separate control of the light source serves to switch the respective light source on and off and possibly also to control its power; the term “control” in this document therefore denotes not only binary switching on and off, but also indicates the achievement of partial light power, if necessary. It is important that the light source with a known position in the matrix raster can be directly controlled, thereby achieving a selectively shaped image composed of illuminated pixels on the projection surface. The separate control can have different designs, it can be simple electromechanical switches for each light source, which are manually operated, or it can be remote control by a person standing on the projection surface or control from a remote control center, as will be described below. Such selective control of light sources is already known, however, the light from individual light sources according to the prior art creates only light spots with blurred edges on the illuminated surface, which, on the one hand, allows to regulate the illumination of different parts of the illuminated surface, for example the floor, but, on the other hand, does not allow to create clear images with sharply defined lines.

[0019] An important part of the present invention is an optical element for projecting light, which is adapted for the joint projection of the radiating elements of the light sources onto a surface outside the body of the device, for example onto the floor of an exhibition or industrial hall or onto the floor of a gym. Unlike known projection devices, the optical element is not focused on projecting a screen, template, film, LCD panel, mirror, but the optical element is adapted for projecting the light of the radiating element of the light source. This eliminates the need to use a condenser lens system, as is known in classic film projectors. The optical element is distanced from the surface with the light sources. Unlike light diffusers, the optical element is physically separated from the light sources.

[0020] An LED usually has an LED semiconductor chip located in a circular, spherical or pyramidal reflector, above which a conductive fiber is led from the anode. The radiating element thus formed is located in a transparent casing, which forms a scattering lens, a diffuser for emitting light. The optical element according to the invention transmits light from the semiconductor chip and from the reflector surface, whereby this light is directed from the optical element to the projection surface as a distinct pixel. The projection of the radiating element of the light source is focused onto the projection surface, whereby the raster from the carrier matrix is transferred onto the surface as a sharp projection of this raster. The radiating element in the case of LEDs is considered to be the semiconductor chip and also the reflector and / or diffuser around the semiconductor chip. It is suitable if the pixel illuminance on the projection surface exceeds 500 lx, preferably exceeds 750 lx, in order to achieve a contrast with the ambient illuminance, which is normally in production halls at a level of up to 300 to 500 lx.

[0021] The use of commonly commercially available LED light-emitting diodes with a small scattering angle of up to 20°, preferably up to 15°, has proven to be advantageous for simple assembly and for focusing the light flow within a single pixel. LED light-emitting diodes can be advantageously used, whereby they have a rectangular cross-section of the transparent casing and / or have a rectangular crosssection of the reflector in which the semiconductor chip with the anode fiber is located. The square, rectangular shape leads to the illumination of a rectangular shape of one pixel on the projection surface and the square shape is more easily connected to lines. However, in practice, a device with a conventional circular plan of the LED reflector has also been reliably tested, which subsequently generates a circular shape of the pixel.

[0022] Projection using the described device consists in projecting separately controlled light points without shading any part of the already created light flow. Modem DLP, LED, DLP, LCD and LCoS projectors use a principle known for more than 120 years, where light from a strong source passes through the film, or rather through a controlled shade, or is reflected from a controlled mirror and dark parts in the resulting image are created by shading the relevant part of the light flux. This leads to situation where even when projecting a small bright point, for example with 5% coverage of the projection surface, it is necessary to shine fully, with 100% power of the central light source. This inefficiency is not significant in cinema projectors, since their operation is dynamic and the total projection time is limited. Using projection devices designed in this way for long-term or even permanent projection is difficult in terms of investment and operation.

[0023] The proposed invention presents significant advantages in both of these indicators. The device does not have a shading element that would cause internal light losses when providing dark spots on the projection surface. Dark spots in the image are achieved by the fact that the respective separate light source on the carrier is not simply turned on and, unlike other devices, 0% of the light is sent to the dark spot. Thanks to this, low electrical consumption of the device is achieved, but also low heating of the light source carrier and the entire device body. The dark pixel in the projection is completely dark, unlike projectors, where even the dark spot has a certain level of illumination. The absence of shading is also advantageous from the point of view of the device's service life, when high-power light sources in projectors have a service life limited to several thousand hours, but conventional LED light sources usable in the device according to the present invention have a service life on the order of tens of thousands of hours. The device also has advantages over laser projectors, which are structurally and operationally demanding and pose a risk to vision.

[0024] The LED diode can be colored, depending on the desired color on the projection surface. In a simple embodiment, the LED diode shines in only one color, preferably white with a temperature of 3500 to 6500 K. The device can also be used with RGB diodes, if they are designed so that all light-emitting elements have a centric arrangement, or so that the light from semiconductor chips for individual colors is combined into one light-conducting segment, which is subsequently projected by an optical element.

[0025] It is obvious that the device according to this invention will not allow detailed and fine rendering of an image on the floor in fine details, as would be possible with the previously mentioned film or data projectors, but in the case of displaying relatively simple images on a large area, it provides significant advantages. By projecting light focused on the desired area (primarily on the floor) using the described device, images composed of a raster can be created according to the number of light sources on the carrier. By placing light points with relatively sharp edges next to each other, lines and subsequently complex images can be created. The size of one light point on the floor will be determined by the number of light sources and the size of the areas to which the optical element of one device will be adjusted with its object and focal distance. These parameters can be appropriately selected when designing the installation according to the required task. For example, a raster on the floor with one pixel with dimensions of approximately 10 x 10 cm is sufficient for rendering lines, borders and so on. One device with a matrix of 50 x 50 light sources can cover an area of 5 x 5 m. If an image of only one point is to be created (for example, one point 10 x 10 cm placed on an area of 5 x 5 m), the device requires a power consumption of 0.04% of the total sum of all light sources on the carrier, the total current consumption is at the level of up to 50 mA, consumption up to 0.6 W. This emphasizes the difference compared to, for example, a spot projector, which needs full power to project the same light point, e.g. 60 to 100 W.

[0026] The optical element of the device is formed by at least one optical lens designed to spread light in the visible range. The optical element may include one coupling lens (coupler), a convex lens, or it may also include a system of lenses that focus the projection of the radiating elements of the light sources onto the projection surface. The optical element may include an aspherical lens or may consist of a Fresnel lens, which achieves a lower weight and thickness of the optical element. The advantage of the device according to the present invention is the fact that one lens is sufficient for the full functionality of the device, which simplifies the entire design of the device. A design with more complex optical systems is not excluded, which can achieve further image improvement. If one lens is used as the optical element, it is appropriate for its diameter to be larger than the diagonal of the matrix with light sources. The lower limit of the lens diameter can be calculated as the diagonal of the matrix increased by the slope of the scattering angles of the light sources.

[0027] The optical element is of a size that allows all light sources on one carrier of the device to be projected by one optical element, which ensures that the regular pitch of the light sources on the carrier is projected onto equally regular pixel pitches on the projection surface. However, a more complicated arrangement is also possible, where one matrix with light sources is projected by several optical elements that are placed next to each other and adjusted so that their projection correctly renders the adjacent light sources on the projection surface. The advantage of the device is mainly the functionality with only one single lens for the entire matrix with light sources.

[0028] The distance of the optical element from the plane with the light sources can be adjusted with the possibility of focus during installation of the device. In one possible embodiment, the device is supplied for installation with a pre-set focus and with a determination of the recommended range of projection distance, for example 10m ±0.5 m, which may correspond to the height of the suspension system for normal industrial hall lighting.

[0029] The device has advantages over the prior art also in the case of simple direct control of the light sources, for example using a group of switches on the rear wall of the device body. In addition to the embodiment in which one switch is used per light source, one row and one column of switches or other local control can also be used, which determines the state of the light source. The utility value of the device is significantly increased if it is provided with remote control of individual light sources. In such a case, the operator can determine the shape of the projected image without access to the device body. Remote control can be provided by a remote wireless controller or is preferably designed so that the device has a data connection with the control center, which sends instructions for activating or deactivating the respective light source. The data connection can be wireless, for example as a MESH network from WIFI communication modules or can be created by a cable, preferably a LAN cable. The device will usually be powered by connecting to the electrical network, when during installation the device is simply connected to the network for controlling the light sources with a LAN cable. The network can also be created by modulating the signal into a voltage supply. In another embodiment, for example for temporary exhibitions or short-term events, the devices can be installed with their own power supply, in which case wireless control of the devices will also be advantageous.

[0030] The device according to the invention is fully functional and usable as a single projector, but it is advantageous to use at least two or at least four devices simultaneously in a system where the devices are spaced apart so that their projection surfaces are adjacent to each other. The system does not have these devices placed close together - as is known, for example, when assembling screens that gradually cover the projection surface. If all devices in one system are the same and are placed at the same distance from the projection surface, the devices will be distributed on the projection surface plan at regular intervals, usually in the centers of the diagonals above the respective projection surface. A system with multiple devices will usually be provided with a control center for centralized input of the desired images. The control center has a display element with a projection surface plan, wherein a raster corresponding to the projection of one light source onto the projection surface is marked in the plan. This allows the operator to transform the desired image into pixels on the screen and subsequently send direct instructions to turn on the respective light sources on the device in a given sector. The control center designed in this way has an appropriate graphical interface and a converter for addressing commands, which will allow full flexibility in timing images and also freedom in their creation within the available number of pixels.

[0031] In another embodiment, the control center can be simplified so that it issues instructions to turn on or off the appropriate light sources on the devices in the desired sector, while the control center has a finite number of images to be projected set in memory. Such a system can be used, for example, in gyms to switch boundaries for various games or training programs. The activation and deactivation of the respective light sources in the matrix can be conveniently controlled in a manner similar to that of controlling LED screens connected into a larger unit. Pairs of sending cards and receiving cards, as in LED screens, can be used to transmit the image from the control center computer to the matrix in the respective devices. The difference is the mutual physical distance of the individual devices from each other in pitch. Only the projections of the projection surfaces are closely adjacent.

[0032] The image projected by the device will usually be stable, but it is also possible to control it in such a way that the image changes dynamically according to instructions from the control center. Controlling the power of the light source will allow one to create images composed not only of pixels of two levels - illuminated I unilluminated, but it will also allow one to adjust the brightness of the illuminated pixel at different levels according to the characteristics of the light source used. This embodiment will allow one to create not only images consisting of lines, curves, but images can include transitions with different levels of illumination. In this way, it is possible to create an image analogous to a black and white display, where white is formed by illuminated pixels and the black (unilluminated) area has the illumination of the surroundings. Controlling the power of the light source will also allow one to illuminate the floor with a lower power of all light sources, thus achieving full illumination of the area similar to classic room lighting. In such case, the device is used as a lighting fixture.

[0033] In another aspect, the invention includes modulating the signal emitted by the light source so that the light source alternately lights on and off in order to transmit information towards the projection surface. Such information can then be read by a simple light-sensitive sensor. It is advantageous if the switching frequency of the light source is higher than the frequency resolution of the human eye, i.e. for example it is higher than 7Hz to 60Hz. Particularly sensitive people are able to observe changes in lighting up to the level of 100 Hz. When the above frequencies are exceeded, the light appears to the surrounding personnel as continuous and uninterrupted, but at the same time it represents a modulated signal with information. In such case, the separate control of the light sources is advantageously used, whereby a different light signal can be transmitted for each light source. A computer program that will process the desired image into pixels according to the resolution of the devices, which subsequently assigns the pixels to sectors and assigns the pixel in the sector to the light source in the device for the relevant sector, is also the subject of the present invention for selected countries.

[0034] The advantage of the proposed invention is the high flexibility of marking communication zones, paths, edges, delimitation of storage areas, work zones, playing plans and so on, while the device is structurally and energetically very undemanding, allowing modular assembly into a system for any floor plan. The advantage is also the ability to control the projection remotely and the possibility of displaying dynamic images. The device and the system have no moving parts, image changes are made by switching the appropriate light sources, thereby achieving high reliability of the device and the system.

[0035] Description of drawings

[0036] The invention is further disclosed by means of figures 1 to 6. The projected image, the number of pixels, the shape of one pixel as well as the details of the location of the LEDs are for illustration purposes only and cannot be interpreted as limiting the scope of protection. Light sources marked with hatching represent an inactive, non-illuminated state. Light sources without hatching represent an active, illuminated state.

[0037] Figure 1 schematically depicts in partial cross-section the projection of two pixels by projecting two active light sources onto the floor of the hall. Figure 1 also shows that the size of the diameter of the lens of the optical element exceeds the size of the matrix increased by the expansion of the light beam to the distance between the matrix and the lens. Figure 2 then depicts the board with the light sources and figure 3 depicts the floor plan with two illuminated pixels. The number of light sources on the board is reduced for clarity and does not correspond to the number of light sources according to the respective embodiment. The size of the pixel on the projection surface of the floor subsequently corresponds to this simplification. Figure 2 depicts the basic dimensional relationship between the size (or diagonal) of the matrix and the lens of the optical element. Figure 3 depicts the device without the body in order to clarify the function of the optical element in transmitting light from the light sources.

[0038] Figures 4 and 5 depict the grouping of several devices into a system, where the devices are controlled from a control center. Figure 4 is a spatial view of the distribution of devices under the ceiling of the hall. Figure 5 is a view of the control center screen, where the operator sets the desired image. Figure 5 depicts the division of the floor into individual sectors illuminated by the respective devices, using dashed lines.

[0039] Figure 6 depicts a device with a remote control in the form of a mobile phone with an application to connect to the device's communication interface.

[0040] Examples of realization

[0041] Example 1

[0042] In this example according to figures 1 to 3, the device 1 has a closed body 3, in which a PCB with mounted light sources 2 is attached. The PCB forms a carrier 22 and the light sources 2 are high-brightness LED diodes 23 with a transverse dimension of up to 3 mm. In this example, a matrix with a grid of 50 x 50 pieces of LED diodes 23 is formed on the carrier 22, while the matrix has edges with a square groundplan of approximately 150 x 150 mm.

[0043] All used LEDs 23 are identical and have a casing 231 that scatters the light from the semiconductor chip with a total angle of approximately 15°. The carrier 22 is planar and on the rear side it is provided with a cooler in the form of an aluminum profile that protrudes from the body 3.

[0044] The body 3 houses a holder 31 of the optical element 4, which carries the optical element 4 and allows changing the distance of the optical element 4 between it and the plane with the carrier 22. After the carrier 22 with the LED diodes 23 is mounted, the holder 31 is adjusted so that the optical element 4 is focused on the plane of the light-emitting elements of the LED diodes 23, i.e. at the level of the reflector and the chips in the LED diodes 23. The optical element 4 consists of one coupling lens, the diameter of which is 230 mm; this diameter exceeds the diagonal of the matrix with the light sources 2, so that all the light sources 2 shine directly onto the surface of the lens.

[0045] The device 1 shines onto the projection surface 5 an image of a pixel, which is an enlargement of the illuminated light source 2. The device 1 has a communication module for receiving instructions for addressing the switching on and off of the light sources 2. The device 1 in this example is used as a single floor projector with dimensions of approximately 5 x 5 m. The image has the shape of arrows for directing visitors in directions according to the most optimal use of the operations in the shopping center hall.

[0046] Example 2

[0047] Six devices 1 according to example 1 are assembled into a system with a control center 6 according to figures 1 to 5. The floor area of 10 x 14 m of the industrial hall in this example is divided into six sectors 7. In the middle of the sectors 7, a device 1 is suspended from the ceiling, the two outer sectors 7 are smaller than the available projection surface 5 of one device 1 , and therefore the outer light sources 2 in the two devices 1 are essentially permanently inactive or can be used to illuminate the adjacent wall. The display field of the device 1 is closely adjacent to the display field of the neighboring device 1 . All devices 1 are connected to the electrical network for powering the sources for the LED diodes 23 and all devices 1 are connected by a LAN cable to the network to the control center 6.

[0048] The floor plan of an industrial hall is displayed on the computer screen in the control center 6. An example of a marked path to a storage area for storing pallets is depicted in figure 5. Such an image is transferred to the floor in figure 4, with the illuminated pixels of the three devices 1 adjacent at the edges and creating a visually continuous line. In the given image, the three devices 1 are without activated light sources 2, thanks to which a high energy efficiency is achieved. According to the instruction from the control center 6, the image can be changed quickly without the need to physically measure it on the floor.

[0049] The relatively small dimensions of the hall shown in this example are chosen only for the sake of clarity of the images. In reality, modem industrial plants reach the size of entire cities, and the representation of the corresponding system with equipment 1 can be a multiple of the provided images. Rapidly developing online stores require the construction of huge warehouses with dimensions in the hundreds of meters to kilometers. Such production and warehouse halls are equipped with prescribed safety features, such as marking of roads, escape routes, edges of warehouses, work zones, etc. Up to 15% of space can be saved by using the space correctly.

[0050] Floor markings and symbols are used to organize activities, facilitate orientation and ensure safety in the company. Floor markings separate people from technology when it moves, thus protecting human health. Modern companies must make the most of people's potential and are forced to optimize people's movement in the premises. Eliminating unnecessary movements thanks to floor displays offers a great benefit. By displaying the correct pallet placement, a lot of space can be saved. A time-optimized route to the correct pallet can also be displayed. Laser projectors or video projectors known from the prior art are expensive and energy-inefficient. The disadvantages of laser projectors are laser safety, high price and relatively complex programming. The disadvantages of video projectors are high energy consumption, since the light source 2 is always on at 100%, and also the high price. A projector with high power is essential for a sufficiently visible image even in broad daylight. For example, for an illumination of 500 lux on a projection surface 5 of 5 x 5 m, a projector with a luminous intensity of 12500 ANSI lumens is required. The price of such a powerful projector is several times higher than the price of the device 1 according to the proposed invention.

[0051] The use of devices 1 and the system for auxiliary marking of the pallet storage location or for marking the path will allow more efficient use of space in the warehouse, or reduce the time to find a given location. In the case of events or concerts, devices 1 can determine the places where and what should be placed. Images, patterns or shapes of the rendering are not limited in advance, they can be changed, so the system can also be used to enter other instructions, for example, a STOP sign is projected and so on.

[0052] The system with the required number of devices 1 can be used in exhibition halls where it is necessary to mark and measure the positions for the installation of exhibition stands, whereby these positions change at each exhibition according to occupancy and contracts with the exhibitors. At exhibition halls, the system according to the proposed invention can easily plot the position of exhibition stands, eliminating the need for lengthy manual measurement on site, effectively reducing the time for marking exhibition stands.

[0053] Example 3

[0054] In the gym, the system according to figure 6 with multiple devices 1 is connected to a control center 6, where the systems of lines for various sports games and training activities are pre-programmed. Personnel with the appropriate authorization adjusts the lighting of the desired image on the gym floor via a mobile phone application.

[0055] Example 4

[0056] The body 3 has an external prism shape with rounded edges, in the lower part the body 3 passes into a circular shape that surrounds the lens. The circular shape of the body 3 creates a shading cylindrical rim of the lens. In the upper part, preferably in the middle of the upper front, the body 3 has a hook for connection to the ceiling, or for connection to the suspension system in the hall. By hanging the body 3, a relatively accurate vertical position and vertical axis of the optical system of the device are achieved. The power cable and the control cable for controlling the individual light sources 2 come out of the body 3. On one side wall of the body 3 there is a handle to facilitate handling of the device, especially during installation.

[0057] Example 5

[0058] The device according to the previous examples has a control adapted to modulate information into an intermittent light flux. The turned-on light source 2 shines intermittently at a frequency that is, in this example, higher than 100 Hz and a signal is modulated into the light. The information is transmitted towards the projection surface 5. Transport carts can move on the projection surface 5, which are equipped with a light sensor and demodulate a signal from the received light. Similarly, devices above the projection surface can be controlled, for example drones in an exhibition hall. It is also possible to control a device stably placed within the space with a signal. For the surrounding personnel, the light appears to be uninterrupted.

[0059] The device allows that adjacent illuminated pixels on the floor, created by the projection of adjacent light sources 2, transmit a differently modulated signal, which can also be used, for example, for selective control of movement on the floor. The signal modulation can consist of classical phase modulation and / or frequency modulation and / or pulse width modulation. A simple form of signal resolution can consist only of a different transmission frequency compared to stable uninterrupted lighting.

[0060] Industrial applicability

[0061] The industrial applicability is obvious. According to this invention, projection or lighting devices can be repeatedly manufactured and used, especially in industrial enterprises, warehouses, exhibition halls, gyms, and so on.

[0062] List of symbols

[0063] 1 - device

[0064] 2 - light source

[0065] 22 - carrier

[0066] 23 - LED diode

[0067] 231 - casing of the LED diode

[0068] 3 - body

[0069] 31 - holder of the optical element

[0070] 4 - optical element

[0071] 5 - projection surface

[0072] 6 - control center

[0073] 7 - sector

[0074] GOBO - graphical optical blackout

[0075] LED - Light Emitting Diode

[0076] DLP - Digital Light Processing

[0077] LCD - Liquid Crystal Display

[0078] LcoS - Liquid Crystal on Semiconductor

[0079] MESH - multi-element network with gradual transfer

[0080] WIFI - wireless network

[0081] LAN - local area network

Claims

AMENDED CLAIMS received by the International Bureau on 01 September 2025 (01.09.2025)1 . A device for a projection and / or an illumination, which includes multiple separated light sources (2) distributed on a surface inside a body (3) of the device (1), whereby the light sources (2) have an independent control, is characterized by the fact, that it includes an common optical element (4) for the projection of a light, where the optical element (4) is designed for a focused projection of a surface with the multiple light sources (2) on a projection surface (5) outside the body (3), and the optical element (4) is designed to project the individual light sources (2) onto a projection surface next to each other, as the light sources (2) are arranged on the surface in the body (3).2 . The device for the projection and / or the illumination according to the claim 1 i s characterized by the fact, the optical element (4) is designed for the focused projection of the surface with all the light sources (2) on a projection surface (5) outside the body (3).3 . The device for the projection and / or the illumination according to the claim 1 or 2 is characterized by the fact, that the light sources (2) are attached on a common carrier (22), preferably on a board, especially preferably with a cooling, whereby at least some of the light sources (2), preferably all the light sources (2), are present in an object plane of the optical element (4), preferably radiating elements of the light sources (2) are present in the object plane.4 . The device for the projection and / or the illumination according to the claims 1 to 3 is characterized by the fact, that the board is planar or it has a cylindrical curvature or a spherical curvature.5 . The device for the projection and / or the illumination according to any of the claims1 to 4 i s characterized by the fact, that the light sources (2) are arranged in a matrix in a regular pitch, preferably the matrix has a rectangular groundplan, especially preferably it has a square groundplan.6 . The device for the projection and / or the illumination according to any of the claims1 to 5 i s characterized by the fact, that the light source (2) is a LED diode (23) with a light-emission in a visible range.7 . The device for the projection and / or the illumination according to the claim 6 i s characterized by the fact, that the LED diode (23) has a luminosity of more than 5 Cd, preferably at least 10 Cd, and a transversal dimension of the LED diode (23) is up to 8 mm, preferably up to 5 mm.8 . The device for the projection and / or the illumination according to the claim 6 or 7 is characterized by the fact, that the LED diode (23) has an angular dispersion up to 20°, preferably up to 15°.9 . The device for the projection and / or the illumination according to any of the claims6to8is characterized by the fact, that the LED diode (23) has a square groundplan of a semi-conductor chip and / or a square groundplan of a reflector, whereby it has, at the same time, square or circular cross-section of a casing (231).10 . The device for the projection and / or the illumination according to any of the claims 1 to 9 is characterized by the fact, that the optical element (4) is a coupling lens.1 1 . The device for the projection and / or the illumination according to any of the claims 1 to 10 is characterized by the fact, that a diameter of the optical element (4) is equal to or greater than a diagonal of the matrix with the light sources (2), preferably the diameter of the optical element (4) is greater than the diagonal of the matrix with the light sources (2) increased by an expansion of a beam in a distance between the matrix and the optical element (4).12 . The device for the projection and / or the illumination according to the claim 10 or 11 is characterized by the fact, that the optical element (4) is Frensel lens or an aspheric lens.13 . The device for the projection and / or the illumination according to any of the claims 1 to 12 i s characterized by the fact, that the distance of the optical element (4) from the plane with the light sources (2) is adjustable, preferably by a holder (31 ) which can be controlled from an outer side of the body (3).14 . The device for the projection and / or the illumination according to any of the claims 1 to 13 is characterized by the fact, that it has a communication element for receiving instructions for the control of individual light sources (2).15 . The device for the projection and / or the illumination according to any of the claims 1 to is characterized by the fact, that the optical element (4) is designed for a depiction on the projection surface which is at least 10 times larger than the size of the surface on which the light sources (2) are distributed, preferably it is at least 20 times larger.

16. A system for the projection and / or the illumination, which includes at least two devices according to any of the claims 1 to 15 i s characterized by the fact, that the devices (1 ) are placed above the projection surface (5) in a pitch which corresponds to the size of the projection from the single device (1 ) and the devices (1) are connected with the control center (6) in order to issue the instructions to control the light sources (2) according to a desired shape of an image.17 . The system for the projection and / or the illumination according to the claim 16 is characterized by the fact, that the control center (6) has a display element with the groundplan of the projection surface (5), whereby a raster corresponding to the projection of at least one light source (2) onto the projection surface (5) is marked in the groundplan.

18. A method of the control of the projection and / or the illumination, where the projection surface (5) is illuminated by at least one of the devices according to any of the claims 1 to 15, is characterized by the fact, that the desired image is placed to the groundplan of the projection surface (5) with sectors (7); depicted pixels are assigned to the respective sector (7), and subsequently they are assigned to a position of the light source (2) in the device (1) in the given sector (7), and a signal to light up the respective light source (2) is sent into this device (1), whereby during a change of the desired image the method is repeated.19 . The method of the control of the projection and / or the illumination according to the claims 18 i s characterized by the fact, that the illuminationof at least one light source (2) is intermittent for a transmission of the signal towards the projection surface (5), preferably with a frequency greater than 7 Hz, especially preferably with the frequency greater than 60 Hz. 0 . A computer program for a realization of the method according to the claim 18 or 19.

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