UA113339C2 - MEDIAFACADE AND LIGHT MODULE OF MEDIAFACADE - Google Patents

Abstract

The invention relates to the field of hardware and software devices for presenting information. The media façade contains a large number of media modules that form the media façade screen and are connected to the video processing and output nodes connected to the central controller and the central control server and the power lines connected to the low-voltage power units. , contains linear controllers capable of enhancing the smooth motion of dynamic image objects with the addition of additional video subframes, converting image gamma over three RGB channels with curve weighting S sensitivity of the human eye by day and by night, increasing exercise descriptions bit color, as well as interaction with the central controller to perform customized flexible smoothing peaks mediafasadom consumed electric power. The technical result achieved by the present invention is to improve the reliability and durability, simplify the procedure of repair and maintenance.

Description

color description, as well as, when interacting with the central controller, implement flexible adjustable smoothing of the peaks of the electrical power consumed by the media facade. The technical result achieved by this invention is an increase in reliability and DURABILITY, simplification of the repair and routine work procedure.

Penn nn pnntnyakechknnechnnnnk і і і і I k N m-n 13 N V Z Z soyeteitete o eottetintkttooi vi I

WE: as Y N and I ; and E. IC N

НВ и full pllktya flow N ED Kohuiechect ee ekyu tt rach: enny 8 N i V i z ШЭ I ш | With more

N fuda ty lona funk dnyni a o v v NE I Dulyttyanintyan u

Mn V; The 3 cases in feeenetentee 1:

TE B rani od NENNY VOIV: : NN Yi shi SHINA shi i NN ! them THEY: NNYA VI VENU (N

VAEYA OOZHEZE PO BEnHV and KN x

KIHEE ezktchnyukhti and MEMTs khkhlulihuei EDS zhatezea vyy Шюхачикук і

TOWER X UN EN NNUNUU VI MN schu ih x VEN ho Byk y KUKI E

WHO VNI PO VYA EYA EV gi

GKU Te OB i that 7 kvi I V I IC ze i MI x

VENI mue V B shhluh yo vika k Eh IZ IZ

PKEE EE KO in SCHO 5

TOWER pa 5 WOMEN uh BAY KZ ZVYMI osti

ICC eztovyoa and MUSCLES хххххкоююх NPC for avihikoi MEDI hakuhhhhktu

NYA NEK SHENYA sh EI h

KUN OTS ANN EY WEE

YAM Z хм х ВХ и BO х

ХЖАКА ОО t Hit HO HA M zh:

GE : AKA Zh pakh g. Kava :

EE SHE shi : And ;

KENYAYA ХОВ ЕЩХ y, y NK ek KEKV I E

KENE Klyakkolaan and MNCC | Ezheteeeeaih PVC damzhhyuhye and BECTSI kety

EE ON EE X TOK: i

KKU OV Zhov: E-ZEZVI i

fig,

The invention relates to equipment for the presentation of information material, more precisely, to medifacades - software and hardware technical devices that are mounted on facades, internal walls, floors and ceilings of buildings and provide demonstration of static and dynamic video content during the day and night.

There is a fairly large number of schematic and structural solutions for media facades on the market. These are transparent and opaque structures, structures in double-glazed windows and facing panels, mesh and skeleton. Solutions in terms of electronics and software are even more diverse.

According to the general concept and category, the claimed media facade is the closest to the media facade according to the utility model patent KO 137412. This media facade contains a large number of light modules placed on carriers, which are connected by information lines to nodes for processing and outputting video data, which in turn are connected to the central controller and the central control server. Light modules are connected to low-voltage power supply units by power lines.

The light module described in the utility model patent includes a housing, printed circuit boards with LEDs and LED drivers, information lines and power lines.

Nodes for processing and outputting video data to the light modules in the media facade according to the specified patent are a receiving board with a system of differential amplifiers and a system of combining several frequency signals into one higher frequency. information signal located on the back of the light modules. This solves the task of transmitting several information signals in one wire over long distances, which allows you to move all control elements beyond the boundaries of the reflecting surface of the media facade (by 100 meters or more).

According to the mentioned patent, the electrical part of the media facade also has a territorial division into sections. The conversion of 220/380 V alternating voltage into 24 V direct current takes place in power supply units located outside the reflecting surface of the media facade. From the power supply units, a direct current with a voltage of 24 V is supplied to the microconverters, which reduce the current from 24 V to the level required for the operation of the LEDs (3-

From 5 V). The microconverters are located on the back side of the board from the LEDs.

The main task, which is solved in the media facade according to the patent VO 137412 for the utility model, is to ensure the maximum possible light transmission due to the reduction of the area covered by structural elements. It is solved by the fact that only display elements are located within the reflecting surface. All other elements, such as power units, control units, signal distribution units and any others are located outside the reflecting surface and can be located at long distances in special technical rooms.

The invention is based on the task of developing a media facade, which ensures that the technical characteristics and parameters are brought to a level after which further improvement of the relevant parameters does not lead to a change in the subjective perception of video information by a person, the possibility of using inexpensive and maximally widespread structural nodes and technologies without harming the technical parameters, increasing reliability and durability, simplifying the procedure for repair and routine work. A separate technical task is the maximum energy efficiency of the media facade.

Another task of the invention is to create a light module for a media facade, which allows solving the above problems.

In the media facade, which contains a large number of light modules placed on carriers, which form the screen of the media facade and which are connected by information lines to nodes for processing and outputting video data, connected to the central controller and the central control server, and by power lines are connected to low-voltage power supply units, the task set, according to the invention, is solved by the fact that, as nodes for processing and outputting video data to light modules, it contains linear controllers capable of increasing the smoothness of the movement of dynamic image objects with the addition of additional subframes of the video sequence, converting the image gamut by three VOB channels with weighting according to the light sensitivity curve of the human eye during the day and night, to increase the resolution of the color description, as well as, when interacting with the central controller, to perform flexible adjustable smoothing of the peaks of the electrical power consumed by the media facade, and linear controllers and low-voltage power supply units are placed along each other one or both horizontal sides of the media facade screen, while the power lines inside the light modules are made in the form of two aluminum tires with a cross-sectional area of 80-100 mm each, which form the internal backbone of the light module.

It is better that the line controllers and the low-voltage power supply units are placed in the same housing.

It is better for the media facade to have a rigid supporting structure with horizontally located supports.

In a light module for use in a media facade containing a housing, printed circuit boards with LEDs and LED drivers, information lines and power lines, the second task of the invention is solved by the fact that the power lines are made in the form of two aluminum buses isolated from each other with a total cross-sectional area of 160 -200 mm", and between one of the tires and printed circuit boards there is a gasket made of heat-conducting polymer.

It is better that the housing of the light module is made in the form of a tube with a rectangular cross-section made of impact-resistant polycarbonate, into which a component that absorbs the ultraviolet component of the sunlight spectrum is introduced during extrusion.

Next, a preferred embodiment of the invention is described with reference to the drawings in which:

Fig. 1 - Structural diagram of the media facade.

Fig. 2 - Linear controllers and low-voltage power supply units in one housing, perspective view, Fig. C - side view, Fig. 4 front view, Fig. 5 - end view.

Fig. 6 - Light module, front view, Fig. 7 - rear view, Fig. 8 - enlarged view of the edge of the light module.

Fig. 9 - Light module with the housing removed, front view, Fig. 10 - rear view, Fig. 11 - enlarged view of the edge of the light module.

Fig. 12 - Longitudinal section of the light module, Fig. 13 - cross section of the light module.

Fig. 14 - Area of attachment-positioning of the edges of the light modules on the carrier. Fig. 15 - Clip for fastening the central part of the light module.

Fig. 16, Fig. 17, Fig. 18, Fig. 19 - Histograms of the consumed power, depending on the brightness of the frame.

As shown in fig. 1, the media facade contains a large number of light modules 1, which form the screen of the media facade and which are connected by information lines to each other and to the linear controllers 2. The linear controllers 2 are connected to the central controller C of the media facade, which, in turn, is connected to connected to the control server 4. Information lines contain lines 5 of one of

From interfaces NOMI, OMI, or МСА connecting the central control server 4 and the central controller Z, high-speed lines for the distribution of signals from the central controller Z to linear controllers 2 (ETNEVMET), low-speed control lines 7 connecting linear controllers 2 with light modules 1, and 8 lines of end-to-end signal transmission connecting light modules 1.

Light modules 1 are connected to each other and to low-voltage power supply units 10 by low-voltage power lines 9, which in turn are connected by power lines 11 to a source 12 of alternating voltage 220/380 V.

As shown in fig. 2-5, linear controllers 2 and low-voltage power supply units 10 are placed in one housing 13, which provides increased resistance to impulse interference.

The housing 13 has a connector 14 for feeding power lines 11, connector 15 for connecting line b of signal distribution (ETNENMET), connector 16 for low-voltage power line 9, connector 17 for control lines 7, access hatches 18 to power supply units and moisture-proof ventilation ports 19.

Housings 13 with linear controllers 2 and low-voltage power supply units 10 in this version of the media facade are evenly distributed along the upper edge of the screen, which consists of columns of light modules 1.

In more detail, the design of light modules 1 is shown in fig. 6-13. The light module 1 contains a housing 20, printed circuit boards 21 with LEDs 22 and LED drivers 23, as well as a cable 24 connecting the printed circuit boards. The light module contains a large number of pixels 25 consisting of four 5MO LEDs 22.

The power lines, which are inside the housing 20, are made in the form of two aluminum tires 26 and 27, each of which has a cross-sectional area of 90 mm?. The buses are separated from each other by an insulating gasket 28, and between the bus 26 and the printed circuit boards 21 there is a gasket 29 made of a heat-conducting polymer. At the ends, the body 20 is closed with plastic plugs 30 with wedge-shaped fastening elements 31, and on the back of the light module, a connector 32 for control lines 7 and a connector 33 for lines 9 of low-voltage power supply are attached to the body.

A typical modification of light modules has a length of 3 meters and is mounted on horizontally located supports 34 (Fig. 14), which form a rigid supporting structure. Fastening is provided by clips 35 (Fig. 15), located in the central part of the housing 20, and wedge-shaped fastening elements 31 interacting with compensating plates 36, which are equipped with carriers 34. They serve to compensate for linear expansions. Each light module is assigned a serial number of 37, which is necessary to fill in the table of corrections for uniformity of illumination.

In general, the work of the media facade is carried out in the following way.

The media facade, as an external display device, is essentially a video monitor connected to a signal source using NOMI digital interfaces,

OMI or analog MA. With the help of one of these interfaces, the signal source - (computer, media player or other equipment) in the declared media facade - control server 4, is connected to the central controller Z of the media facade. The central controller captures the video stream, analyzes and processes the data, administers the operation of the associated quality improvement functions, and distributes the data intended for a large number of line controllers. After processing and distribution in the central controller, the data are transferred to linear controllers 2 according to the ETNEVMET protocol.

After the data is received in linear controllers 2, in each of them, at the hardware level, the received packets are captured, buffering of the last two incoming frames, analysis and addition of subframes to increase the smoothness of the movement of dynamic objects, superimposition of correction tables for the unevenness of the light output of each LED (data about correction are delivered together with light modules 1 and are stored in the central Z and linear controllers 2), increasing the bit rate of data for the next overlay of color channel processing curves, overlay of gamma curves (weighting according to the light sensitivity curve of the eye), application of digital video processing functions (brightness, total gamma, saturation). After processing the data of the next frame by the linear controller 2 with the help of a specialized serial interface, it is transmitted to a part of the light modules 1 of the screen connected to it, and a command is sent to display on the screen. Through this interface, the linear controller 2 also programs the service control registers of the drivers 23 of the LEDs 22 in the light modules 1 and programs the correction of the unevenness of the light output of the LEDs 22.

The data in the light modules 1 are distributed sequentially along the driver chains 23 of the LEDs 22 according to the shift register principle for the length of one vertical column of the screen. After the data column is completely filled, the information is displayed on the screen.

Then the procedure is repeated.

The media facade, according to the invention, is designed to obtain an increased (up to 1600 Hz) frame rate, the maximum bit rate of color description (48 bits), high brightness, stable illumination of the entire field, and the achievement of an unlimited maximum size. It is built on the principle of cascade distribution and processing of video data. It implements the technology of increasing the smoothness of the movement of dynamic image objects with the addition of additional subframes of the video sequence and at the same time increasing the real frame rate from 30-60 Hz to 400, 800, or 1600 different real frames per second. In addition, it implements the technology of transforming the image gamut separately in three high-resolution color channels with weighting according to the light sensitivity curve of the human eye in daytime and nighttime. This transformation is carried out not in the central computer of the operator and not in the central controller of the media facade, but in the linear controllers 3, immediately before the output to the light modules 1. Due to the fact that the curve of the function of such a transformation has rather gentle sections, the software-hardware processing module, located in linear controllers 2, performs an increase in the bit rate of the color description from the most common system with 16777216 (224) shades to 281474976'710'656 (248) shades. This leads to a significant increase in the amount of output information. In practice, this innovation leads to the possibility of rendering the most smooth transitions between shades, the absence of gradation on gradients, and the most accurate color rendering of the displayed content. In total, this transformation in combination with an increase in the frame rate leads to an increase in the amount of information output to the light module 1 by more than 100 times. This became possible thanks to the location of the linear controllers 2 as close as possible to the light modules 1. The signal transmission distance in this area is no more than 600 mm. This organization of output and processing of information provides the following advantages of the media facade: - Increasing the frequency of real information recovery on large-format screens up to 400-1600 Hz. This leads to a lack of gradation in the movement of fast content elements. - Moving away from high-speed data transmission lines to linear controllers. This leads to a radical reduction in the cost of the hardware part of the product without loss of characteristics and an increase in its market attractiveness. - The absence of strictly specialized low-volume electronic components in the hardware part leads to greater maintainability of the equipment. Due to the low cost and high market prevalence of distributed computing controllers, the efficiency of media facade maintenance increases. - Full interchangeability of linear computing modules. - This scheme also allows you to flexibly change the configuration and dimensions of the screen without significant changes to ready-made block solutions. - Due to low requirements for linear controller blocks (a small volume of processed data for a single module), low energy consumption of linear controllers and a low level of electromagnetic radiation are achieved.

One of the most important factors for the ideal operation of the media facade is the quality of the voltages supplying the light modules. The light modules of 1 media garden are powered by a human-safe voltage of 15 V. At the same time, the power of a large modern media facade can reach 1 MW at peak consumption. At the same time, the total current consumption reaches 66 kA. The above was the reason for using a design solution according to which the power supply units of 7 light modules 1 are located in close proximity to the consumption circuits (as mentioned above, in this embodiment, they are placed along the upper horizontal face of the screen). This distinctive design feature of the media facade allows to reduce heat losses in power cables as much as possible, to get rid of bulky, expensive cables that supply low-voltage power altogether. The small distance of the consumer from the power source leads to a decrease in induction surges of the supply voltage at the moment when the load shows a dynamic nature. This innovation in practice leads to a reduction of noise on the screen, an increase in the stability of operation (especially of large structures), a reduction of thermal energy losses in the supply cables, and a reduction of the parasitic electromagnetic radiation of the structure.

When displaying video content on the LED screen, the power consumption varies within very wide limits within milliseconds (depending on the content of the video stream). Instantaneous power consumption is illustrated in the form of histograms in fig. 16 and 17. The histograms shown in the corner of the frame show the number of points with different luminosity. The histogram consists horizontally of a large number of columns, the height of which reflects the number of points in the frame with a specific value of brightness. To the left horizontally are the points z

With minimum brightness (and, therefore, energy consumption), on the right - with maximum. So, in fig. 16, it can be seen that in the plot of the frame, points (pixels) with 3 low brightness have an absolute numerical advantage, and the total arithmetic average value of the brightness of a pixel in the frame is 28.25 (on a scale of 255 gradations). At the same time, in the frame shown in fig. 17, the vast majority of pixels with high luminance brightness are noticeable, the average value is already 189.83. From the above, it becomes clear that in the case that displays the second frame, the media facade already consumes energy close to the maximum. It should be noted that the vast majority of frames in a standard video series give histograms with values in the range from 70 to 160, and higher values already, as a rule, lead to the subjective impression of a decrease in the contrast of the picture and to a blinding effect in the dark.

In practice, the sharp transition of the image from dark frames to bright ones means an instant increase in power consumption, which leads to peak overloads of the power grid that feeds the structure. Under certain conditions, a situation may arise on media facades of large formats, in which the consumed power can vary from practically zero to hundreds of kilowatts several times per second. This is equivalent to the synchronous operation of up to a hundred welding machines.

In the event that the power supply network at the connection point of the media facade is unable to provide a similar (pulse) mode of operation, the use of an auto-regulation system is absolutely necessary.

When outputting a video stream, it is possible to insert an additional filter - an instantaneous power limiter. When processing the frame, an additional calculation of the brightness histogram of each frame is performed in real time, and if it exceeds the permissible limit, the total brightness and gamma of the entire frame are reduced to a value at which the histogram indicator will be below the set value. If the total power does not exceed the permissible, no additional corrections are made.

The value of the threshold of this limitation can be quickly changed at the software level and is set in the forms of the application software.

The result of this system visually looks like this. In fig. 18 shows the response of the limiter to a frame exceeding the histogram threshold. As can be seen, the number of points with lower brightness has significantly decreased, and the average brightness of a pixel has decreased from 189.83 to 136.85. This happened without losing plot accuracy.

At the same time, the operation of the system on a frame with a low average brightness does not lead to its correction. This can be seen in fig. 19.

This organization of regulation of the maximum consumed power provides the following advantages of the media facade: - Effective fight against the negative consequences of the influence of dynamic loads on the power network at high consumption currents. - The ability to eliminate the blinding effect on bright subjects at night and twilight time of operation. - Makes it possible to emphasize the lighting of local (occupying only part of the screen) bright details of the image.

An important feature of the media facade is the design of the light module 1. The housing 20 of the light module is a hermetic tube of rectangular section made of impact-resistant polycarbonate, into which a component that absorbs the ultraviolet component of the sunlight spectrum is introduced during extrusion. This solution is used due to the fact that ultraviolet radiation leads to extremely fast degradation of LED crystals. The housing of the light module is made in compliance with the IRB7 security standards. Connectors 33 and 32 have similar parameters. A moisture-absorbing component is placed inside the light module, which prevents the appearance of oxides in places of soldering and fogging of the tube during sharp temperature fluctuations.

The key element of the light modules of the media facade is the internal aluminum tire frame, which performs three functions at the same time.

The first and main one is the supply of power through aluminum profiles-buses 26, 27. Due to the fact that the power supply of the light module is low-voltage, it is necessary to ensure high supply currents. This is especially relevant in media facades with a long line length. To ensure small losses in the power cable, it is necessary to increase the cross-section of the power cable. Using the technology with a tire frame, it was possible to obtain a cross-section of the power supply of the order of 2x90 mm?. This solution makes it possible to build very long power lines for light modules without additional wiring and not to experience significant voltage drops even at maximum loads. In addition, the specific resistance of such a power circuit is low

Z0 allows you to avoid the cross-influence of directions created by individual printed circuit boards of the light module. This leads to an increase in the stability of the light modules, which are farthest from the linear controller and the power supply unit.

The second function of the aluminum frame is the effective removal of heat emitted by the drivers of the 23 LEDs of light module 1. The less stressful temperature regime increases the accuracy of the reference output currents of the driver and, accordingly, the stability and uniformity of the screen glow as a whole. Also, the lower operating temperature of the driver increases the duration of its trouble-free operation.

The third function of the internal frame is to increase the mechanical rigidity of the light module, the length of which reaches Z m. The absence of even minimal mechanical deformations is reflected by a high degree of stability of inter-pixel distances horizontally. Detonation of brightness less than 2 9" is noticeable. So, with an interpixel distance (pitch) of 50 mm, a deviation of 1 mm can already turn into a noticeable deviation of brightness in this area. In addition, the high mechanical rigidity of the light module ensures the absence of internal stresses, soldering violations, which ensures high reliability of the structure.

An important feature of the media facade is the installation system of light modules 1. Unlike most known media facades, the media facade according to the invention has a rigid supporting structure. The use of a rigid supporting structure allows to achieve the highest accuracy of observing the horizontal pitch. Also, with this fastening, a high angular accuracy of the directionality of the light module is achieved, which is unattainable on mesh and cable structures. In addition, the rigid design allows to distribute the load on the facade of the house as evenly as possible (both weight and wind).

A rigid structure tolerates icing more easily, because the increased load due to ice will also be evenly distributed over the entire facade of the house. Another advantage of the rigid supporting structure is the absence of a violation of the flatness of the screen under the influence of wind gusts.

Also, an important feature of light modules 1 of the media facade is the fastening system.

The light module has (with a length of 3 m) four attachment points. Two supporting ones in the center (clips 35) and two nodes of automatic fastening on the edges (30, 31). The extreme mounts operate according to the principle of snap-in and make it possible to replace the light module by the efforts of one climber or mountaineer in the shortest possible time.

Each crystal of each LED, after manufacturing the light module, is calibrated for the brightness of its glow at 64 points in the entire power range.

The calibration data is stored on the control server 4. When replacing the light module 1 during the repair, the calibration data is entered into the special software of the server and automatically entered into the newly installed light module.

This function allows you to get the most even field of light on the media facade.

Claims (5)

FORMULA OF THE INVENTION 1. The media facade, which contains light modules, placed on carriers that form the screen of the media facade and which are connected by information lines to the nodes for processing and outputting video data, which are connected to the central controller and the central control server, and by the corresponding power lines connected to low-voltage power supply units, which is distinguished by the fact that, as nodes for processing and outputting video data in the light modules, the media facade contains linear controllers, which are made with the ability to increase the smoothness of the movement of dynamic image objects with the addition of additional subframes of the video sequence, to transform the image gamut in three NEW channels with weighting according to the light sensitivity curve of the human eye during the day and night, to increase the resolution of the color description, when interacting with the central controller, to perform a flexible adjustable smoothing of the peaks of the electrical power consumed by the media facade, and linear controllers and low-voltage power supply units are placed along one or both horizons ontal faces of the media facade screen, and the power lines inside the light modules are made in the form of two aluminum tires with a cross-sectional area of 80-100 mm each, which form the internal backbone of the light module. 2. The media facade according to claim 1, which is characterized by the fact that linear controllers and low-voltage power supply units are placed in the same housing. C. The media facade according to claim 1, which is characterized by the fact that it has a rigid supporting structure with horizontally located supports. 4. The light module of the media facade, which contains a case, printed circuit boards with LEDs and LED drivers, information lines and power lines, which is distinguished by the fact that the power lines are made in the form of two aluminum buses isolated from each other with a total cross-sectional area of 160-200 mm, and between one of the tires and printed circuit boards there is a gasket made of heat-conducting polymer. 5. The light module according to claim 4, which is distinguished by the fact that its body is made in the form of a tube with a rectangular cross-section made of impact-resistant polycarbonate, into which, during extrusion, a component is introduced that absorbs the ultraviolet component of the spectrum of sunlight. inn En tu TKU, en mem COMA 5 m N DIDY tekhahnkote and DEMINK Al Anateyukh POD Hettetuyezhhyuh KESHII la tzhteyav TEBE Jh claim 5 Ve VI EE: Jan. 1