A persistance-of-vision display system with a mechanism for adjustment of set-up and adjustment angle of each display

Abstract

The present invention is a persistence-of-vision display system comprising: a base plane (1); at least two displays (2), wherein each display (2) comprises one or more rotatable rays (22), a phase synchronization module configured to set a phase (P) of rotation of the rays (22) for each display (2); and a mechanism configured to incline the rotation axis (O) of the display (2) by a set-up angle (αXY) and by an adjustment angle (βZΩ) so that the rays (22) of adjacent displays (2) being out of set phase (P) of rotation do not collide, and so that after synchronization of phases (P) of rotations of the rays (22) for each display (2), the rotation planes (12) of the displays (2) are moved in one common plane without a collision of the rays (22) of adjacent displays (2).

Description

A PERSISTANCE-OF -VISION DISPLAY SYSTEM WITH A MECHANISM FOR ADJUSTMENT OF SET-UP AND ADJUSTMENT ANGLE OF EACH DISPLAYField of the invention

[0001] The present invention relates to a persistence-of-vision display systems with mechanisms for adjustment of set-up and adjustment angle of each display.Background of the invention

[0002] Persistance-of-vision (PoV) is a phenomenon whereby a succession of images is perceived by the brain as forming a moving image

[0003] US2010 / 020107 discloses a composite display that comprises a paddle configured to sweep out an area, a plurality of pixel elements mounted on the paddle, and one or more optical sensors mounted on the paddle and configured to measure luminance values of the plurality of pixel elements. Selectively activating one or more of pixel elements while the paddle sweeps the area causes at least a portion of an image to be rendered. US2011 / 0164070 discloses a display module, which comprises at least one light source movable along a pre- determined path and a controller adapted to modulate the intensity of light emitted by the at least one light source as it moves along the predetermined path so as to cause a desired image to be visible by virtue of persistence of vision. The display module further comprises a drive sys- tern for causing the at least one light source to move along the predetermined path and a coupling system adapted to ensure the drive system causes the at least one light source to move, in use, along the predetermined path in synchrony with the light sources on one or more adjacent display modules. Similar design is also disclosed in US2013 / 215000.

[0004] CN110097843 discloses a display system comprising rotary displays arranged in a partially overlapped manner. The adjacent displays rotate in opposite directions. Each rotating display comprises a controller for detecting and controlling a rotating speed and a position of rays of the rotating display.

[0005] GB2613369 discloses a PoV display comprising a plurality of display modules with rotating light sources arranged on a grid pattern, wherein diagonally adjacent modules are located on the same plane and have light sources with non-overlapping paths and the same rotational direction, and perpendicularly adjacent modules are located on different planes and have light sources with overlapping paths and opposite rotational directions. The speed of themodules is controlled through, maintaining at a pre-set value, the phase-shift between a synchronisation signal generated by the modules in response to the movement of the light source and a reference signal comprising a timing feature based on the desired speed.

[0006] Aforementioned Persistance-of-vision (PoV) displays needs precise phase synchronization of rotating displays to avoid collisions that increases system complexity and requires precise control mechanisms. Moving parts such as rays or arms pose safety risks, particularly in case of mechanical failure or an emergency stop, which may cause unintended collisions between the rays. There is a need for a PoV that is safe to operate and in the same time removes visible artifacts, distortions, or flickering in the displayed image.Summary of the invention

[0007] The aim is achieved by design of a persistence-of-vision display system comprising a base plane, at least two displays with its respective display supports associated with the base plane. Each display comprises one or more rays comprising a plurality of light-emitting elements. The rays are configured to be rotated to hereby form a rotation plane of the display and a rotation axis of the display that is orthogonal to the rotation plane of the display. Moreover, the rays of displays that overlap rotate in opposite directions.

[0008] The display system comprises a phase synchronization module configured to set a phase of rotation of the rays for each display so that during rotation the rays of the adjacent displays do not occupy a position, in which the ray of one display obscures at least one light-emitting element of the ray of adjacent display. Similar phase synchronization module is disclosed in GB2613369.

[0009] The distinguishing feature of the invention is a mechanism configured to incline the rotation axis of the display by a set-up angle and by an adjustment angle. The set-up angle is the angle relative to the base plane axis in the base plane. The adjustment angle is relative to the axis orthogonal to the base plane in the plane formed by the axis orthogonal to the base plane and the axis in the base plane formed by the set-up angle so that the rays of adjacent displays being out of set phase of rotation do not collide. Moreover, the mechanism is configured to incline the rotation axis of the display by an adjustment angle so that after synchronization of phases of rotations of the rays for each display, the rotation planes of the displays are moved in one common plane without a collision of the rays of adjacent displays. This arrangement of the set-up angle and the adjustment angle in other words may be explained as follows: the set-up angle is the angle between the base plane axis in the base plane andprojection axis of the rotation axis of the display on the base plane, and by the adjustment angle in the plane formed by the projection axis of the rotation axis of the display on the base plane.

[0010] The set-up angle is set based on parameters selected from the group of a number of the displays, configuration of the displays, size of rays of the displays and distances between the rotation axis of the displays, such that the rotation axis of the displays can be inclined by the adjustment angle to one common plane without collision of that the rays of adjacent displays.

[0011] In another embodiment of the invention, the PoV display comprises four displays arranged in two rows and two columns and in a distance from each other such that when all four rotation planes of the displays are in one common plane, the rotation planes of the displays interlap each other forming a common overlapping region. The phase synchronization module is configured to set the phase of rotation of the rays of each display such that the rays of diagonally arranged displays pass through the common overlapping region one after another without collision.

[0012] The mechanism of the persistence-of-vision display system comprises: a plurality of display supports, wherein each display is mounted to its respective display support; a plurality of rotation axles, wherein each display support is fixed to the rotation axle so that the rotation of the rotation axle inclines the display supports and respective displays connected thereto; a plurality of levers coupled to said rotation axles so that a movement of the lever rotates the rotation axle; a rod hingedly connected and linked to the levers so that a movement of rod moves simultaneously all levers that are connected to the rod; and an actuator operatively coupled to the lever and / or rod and / or rotation axle and configured to move the lever and / or rod and / or rotation axle to adjust the adjustment angle of the rotation axis of the displays so that rays of the display do not collide with the rays of adjacent displays preventing collision of the rays of the displays to each other during an initial rotation phase and before said displays reach a synchronized rotation mode or in case of emergency stop.

[0013] Each display may further comprise a second axle rotationally mounted to the display support and positioned orthogonal to the rotation axle of the display support; and a guide mechanism comprising a guide plate having a slot and a bar slidably arranged within the slot, wherein the bar is connected to the display support so that by the movement of the bar within the slot, the display support rotates around the second axle.

[0014] In another embodiment tof the invention, the mechanism comprises a rotary block associated with the display support, wherein the rotary block comprises a motor, a gearbox, a sensor, and a control board, and wherein the rotary block is configured to incline the rotation axis of the display by a set-up angle and configured to further incline the rotation axis of thedisplay by an adjustment angle through the plane formed at the set-up angle so that the rays of adjacent displays do not collide to each other being out of set phase of rotation of the rays, and configured to incline the rotation axis of the display by an adjustment angle so that after the set of phases of rotations of the rays for each display, the rotation plane of the displays are moved can be moved in one common plane without a collision of the rays of adjacent displays.

[0015] The present invention is also a method for operating a persistence-of-vision display system. The method comprises: a) positioning the displays in a parking configuration, in which the rotation axis of the display are inclined by a set-up angle and an adjustment angle in relation to initial rotation axis that is orthogonal to the base plane; b) initiating rotation of said displays in a synchronized manner such that rotating rays of the adjacent displays do not occupy a position, in which the ray of one display obscures at least one light-emitting element of the ray of adjacent display, wherein the rays of displays that overlap are rotated in opposite directions; c) adjusting the adjustment angle of the rotation axis of the displays until the rotation planes of the displays are moved in one common plane without a collision of the rays of adjacent displays; and d) maintaining reached state, in result of which image gaps are significantly reduced or eliminated without a risk of collision. The same method applies for the independently adjustable rotary blocks.

[0016] The method for emergency conditions comprises the following steps: e) detecting an emergency condition from at least one of said displays; f) initiating a parking mode for said rotating displays in response to the emergency condition; g) adjusting the adjustment angle of the rotation axis of the displays until the rotation planes of the displays are moved out from one common plane; and h) maintaining a parking mode for said displays upon power-down. The same method applies for the independently adjustable rotary blocks.

[0017] The present invention provides a divergence of the rotation planes of the displays from the direction of inclination and angle of inclination of the displays. Initially, at startup, all displays start from a parking mode, where the rotation planes of the display do not intersect, but the arms themselves overlap each other. In the parking mode the displays are already turned and inclined in the predefined direction and at the predefined angle. After the displays have reached the required speed and their rotation phases are synchronized in the required state, the displays are turned or inclined in one single plane.

[0018] Further features and advantages of the invention will become apparent from the following description of preferred embodiments of the invention, given by way of example only, which is made with reference to the accompanying drawingsBrief description of the drawings

[0019] The drawings illustrate through examples embodiments of the invention falling within the scope of the invention as defined by the claims.

[0020] Fig. 1 is a top view of a persistence-of-vision display system comprising four displays (2).

[0021] Fig. 2 is perspective view of the persistence-of-vision display system comprising four displays (2), where all four displays (2) are inclined relative to a base (1).

[0022] Fig. 3 is a side view of the persistence-of-vision display system as seen in Fig. 2.

[0023] Fig. 4 is a bottom view of another embodiment of the persistence-of-vision display system.

[0024] Fig. 5 is a top view of the persistence-of-vision display system as seen in Fig. 4.

[0025] Fig. 6 is a side view of the displays (2) inclined relative to a base (1), which is a parking position for the displays (2).

[0026] Fig. 7 illustrates the displays (2) as seen in Fig. 6, but in working position.

[0027] Fig. 8 shows that rotation phase of rays (22) of each display (2) is shifted by predetermined phase shift (P) or rotation angle.

[0028] Fig. 9 illustrates an embodiment of a persistence-of-vision display comprising four displays (2) arranged in two rows and two columns so that in the centre of this arrangement the rotations planes (12) of four displays (2) overlaps forming a common overlapping region (30).

[0029] Fig. 10 illustrates another embodiment of the persistence-of-vision display system, where two supplementary displays (2) are added to four displays (2) of the persistence-of- vision display system as seen in Fig. 1.

[0030] Fig. 11 is a block diagram of a control of displays (2).

[0031] Fig. 12 illustrates the display support (3) and the display (2) with four rays (22) connected thereto, and Fig. 12 also illustrates angles (aXY; PZQ), under which the rotation axis (O) of the display (2) is tilted or inclined by means of the mechanism.Detailed description of the embodiments

[0032] Fig. 1 is a top view of a persistence-of-vision display system comprising four displays (2). Fig. 2 illustrates a persistence-of-vision display system as seen in Fig. 1, where all four displays (2) are inclined relative to a base or base plane (1). Fig. 3 is a side view of thepersistence-of-vision display system as seen in Fig. 2. Each display (2) comprises four rays (22) and each ray (22) comprises a plurality of light emitting elements. The four rays (22) are configured to be rotated to hereby form a circular display (2). The persistence-of-vision display system comprises a mechanism configured to adjust the set-up angle (aXY) and the adjustment angle (0ZQ). The mechanism comprises four display supports (3) and each display (2) is mounted to its respective display support (3). The mechanism comprises three rotation axles (4), wherein each display support (3) is fixed to the rotation axle (4) so that the rotation of the rotation axle (4) inclines the display supports (3) and respective displays (2) connected thereto. In this embodiment, two display supports (3) are connected to one common rotation axle (4), but other two display supports (3) are mounted to each separate rotational axle (4). The mechanism comprises three levers (4.1), where each lever (4.1) is coupled to its respective rotation axles (4) so that a movement of the lever (4.1) rotates the rotation axle (4). The mechanism further comprises two rods (4.2) hingedly connected and linked to all three levers (4.1) so that a movement of the rod (4.2) moves simultaneously all three levers (4.1) that are connected to the rods (4.2). The mechanism further comprises an actuator (4.3) operatively coupled to the rotation axle (4) through an auxiliary lever (4.9) and configured to rotate the rotation axle (4) changing the the set-up angle (aXY) and the adjustment angle (PZQ) so that rays (22) of the display (2) do not collide with the rays (22) of adjacent displays (2) preventing collision of displays (2) during an initial rotation phase and before said displays (2) reach a synchronized rotation mode or in case of emergency stop. The persistence-of-vision display system comprises a rotation module as a part of a control module, which rotates adjacent displays (2) in opposite directions. The system also comprises a phase synchronization module as a part of the control module. The phase synchronization module is dependent on the rotation module that rotates devices in opposite directions. This phase synchronization module sets the phase (P) of adjacent displays (2) in 45 degrees so that the rays (22) of the displays (2) do not overlap. The mechanism also comprises a positioning sensor configured to provide data regarding a position of at least one ray (22) of the display (2) in relation to the base (1) facilitating operation of the phase synchronization module. The system further comprises a module configured to control the actuator (4.3) for changing the angle (A) of the rotation plane (12) of the displays (2) and its rays (22). In the initial state, this module holds the displays (2) in three different planes. Also, this module works in conjunction with the phase synchronization module, and at the predetermined moment, the module activates the actuator (4.3.) bringing the rotation planes (12) of all displays (2) into one common plane.

[0033] The mechanism as disclosed in Figs 1 to 3 does not allow the rays (22) of the displays (2) to collide at the moment of start of the rotation and before the displays (2) enter the predetermined operating mode. The predetermined operating mode is understood as synchronized rotation of the displays (2) as described in patent application publication No. GB2613369A “Display system and method of operation”. At the start of operation, when the system is in a parking mode, the rotation planes (12) of the displays (2) are in different parallel planes (see Fig. 3). In this case, the initial the set-up angle (aXY) and the adjustment angle (PZQ) is determined taking into account the physical dimensions of the display wall and displays (2). After the displays (2) reach the desired rotation modes as described in the patent application publication No. GB2613369A “Display system and method of operation”, the mechanism by means of the levers (4.1) and rods (4.2) attached thereto, which in turn transmit force and motion to the rotation axles (4), slowly shift or incline the rotation planes (12) of the displays (2) from different rotation planes (12) into one common plane. As a result, the rotation planes (12) of the displays (2) are in one common plane. The main advantage of rotating rotation planes (12) of the displays (2) is a large difference in the distance between the rotation planes (12) of the displays (2) at small angular displacements around the axis of rotation of the rotation planes (12) of the displays (2), which allows one to achieve the following technical effect: reduction of the time to space the rotation planes (12) of the displays (2) to a safe distance in emergency situations, which in turn ensures higher operational safety of the displays (2) in the assembled wall. The time required for the safe separation is less than 0.1 seconds.

[0034] Fig. 4 is a bottom view of another embodiment of the persistence-of-vision display system with a mechanism for adjusting the set-up angle (aXY) and the adjustment angle (PZQ). In addition to the mechanism as disclosed in the previous paragraph, the mechanism comprises second axles (4.4), where each second axle (4.4) is rotationally mounted to the respective display support (3) and positioned orthogonal to the rotation axle (4) of the display support (3). The mechanism further comprises a guide mechanism for each display (2) and its respective display support (3). The guide mechanism comprises a guide plate (4.5) having a slot (4.8) and a bar (4.7) slidably arranged within the slot (4.8). The bar (4.7) is connected to the display support (3) so that by the movement of the bar (4.7) within the slot (4.8), the display support (3) rotates around the second axle (4.4). These additional features allow for changing the angle of the rotation planes (12) of the display rays (22). The rotation planes (12) of the display rays (22) can maintain each display (2) in different planes. This module sets the rotation angles so that all rotation planes (12) of the rays (22) do not intersect - this is an angle in three-dimensional space, which is defined by two angles. And the non-obvious aspect here is that four devices can be arranged in three different planes using a 3 -dimensional rotation of the device’s axis of rotation relative to the base (1). Angle#l is about 45 degrees, and Angle#2 is from 0 to 5 degrees.

[0035] The mechanism in Fig. 4 adds a second degree of freedom through the second axle (4.4), in result of which the rotation plane (12) of the display (2) can rotate not only around the rotation axle (4), but also around the second axle (4.4). The rotation around the second axle (4.4) is controlled by means of the guide mechanism comprising the guide plate (4.5) with the slot (4.8) and the bar (4.7). Due to the slot (4.8) in the guide plate (4.5), along which the rod (4.7) runs, it is possible to deflect or further incline the rotation planes (12) of the displays (2) so that the rotation planes (12) of the adjacent displays (2) are spaced apart. In other configurations, the slot (4.8) can be of any shape suitable for operation of the displays (2). It is also possible to make a slot (4.8) in the guide plate (4.5) of such a configuration that during the rotation planes (12) of the displays (2), the gyroscopic moment can be taken into account.

[0036] The rotation of the display support (3) of the display (2) around the rotation axle (4) is a first axis of rotation and the rotation of the display support (3) of the display (2) around the second axle (4.4) is a second axis of rotation. The second axis of rotation is perpendicular to the first axis of rotation, allowing for adjustment of the axis of the rotation plane (12) in relation to the base (1) is a cone like manner.

[0037] Fig. 5 is a top view of the persistence-of-vision display system as seen in Fig. 4. As the displays (2) are inclined then the rays (22) of the displays (2) may freely rotate without a danger of collision against the ray (22) of the adjacent display (2). Since the guide plate (4.5) and two degrees of freedom allow all adjacent rotation planes (12) of the displays (2) to be separated at different levels in the parking position, this makes it possible to bring the displays (2) located diagonally closer to each other. In Fig. 5 these are displays (2) No. 1 with No. 3 and No. 2 with No. 4, without mechanical damage to the rays (22) of the displays (2). This intersection, with the correct phase shifts during the rotation of the rays (22), allows to get rid of areas not exposed to light, “holes” in the image, which inevitably appeared in walls with static displays spaced in different planes depth wise.

[0038] Fig. 6 is a side view of the displays (2) inclined relative to a base (1) as seen in Fig. 5, which is a parking position for the displays (2). When the voltage is applied, the displays (2) begin to rotate each in its own direction as seen in Fig. 5. The displays (2) are initially in the parking position before the voltage is applied, and rotation planes (12) of the displays (2) do not intersect as seen Fig.6. Fig. 6 illustrate a state of the display (2) at the moment of start, therays (22) of the displays (2) are in different rotation planes (12) of the displays (2) avoiding any mechanical damage to the rays (22) during start.

[0039] Fig. 7 is the side view of the displays (2) as seen in Fig. 6, but in working position. When the displays (2) start rotating and become synchronized in accordance with how it is described in patent application publication No. GB2613369A “Display system and method of operation”, each display (2) will rotate in its calculated phase (P), whereas the calculation of the phase (P) depends on the wall design and the reference point (R). After that, a command is given to mechanism for adjusting the set-up angle (aXY) and the adjustment angle (0ZQ), and the mechanism moves all displays (2) in one common plane as seen in Fig. 7.

[0040] In another embodiment of the invention similar to the one as seen in Fig. 4, a configuration of one slot (4.8) for one display (2) differs from a configuration on another slot (4.8) for another display (2) allowing for independent adjustment of the spacing between planes (12) and axis of rotation of adjacent displays (2).

[0041] Fig. 8 shows that rotation phases of rays (22) of displays (2) are shifted by predetermined phase shift or angles. This shift depends on the design of the rays (22), the proximity of rays (22) to each other in the displays (2) located diagonally (display (2) numbers 1-3 and 2-4 in Fig. 8), and the accuracy of phase (P) retention during the rotation of the rays (22).

[0042] Fig. 9 illustrates an embodiment of a persistence-of-vision display comprising four displays (2) arranged in two rows and two columns so that in the centre of this arrangement the rotations planes (12) of four displays (2) overlaps.

[0043] Fig. 11 illustrates another embodiment of the persistence-of-vision display system, where two supplementary displays (2) are added to four displays (2) of the persistence-of- vision display system as seen in Fig. 1. The mechanism comprises additional two rotary blocks (6) associated with the display support (3). Each rotary block (6) comprises a motor, a gearbox, a sensor, and a control board. The rotary block (6) is configured to position said display support (3) with its associated display (2) using said sensor, and wherein said control board communicating with the control boards of other rotary blocks (6) of other displays (2) and with a control module via a communication interface. The control board of the rotary block (6) controls movement of the rotary block (6) and its associated display (2) precisely to the desired plane using sensors, and to obtain additional information on the digital IR interface, communicates with its display (2) and with the common rotary block control module via the CAN interface as seen in Fig. 11. The mechanism of Fig. 10 compared to the previouslydescribed mechanism in Figs. 1 to 8, has no complicated mechanics, is easy to assemble and set up. By adding another degree of freedom to this mechanism, the second axis perpendicular to the first, it is possible to modify the axis of the rotation plane (12) of the displays (2) along the cone.

[0044] Fig. 11 is a block diagram of a control of displays (2). In normal operation mode, when turned on, each rotary block adjusts itself and automatically switches to parking mode and waits for further commands from a main unit, the main control module of the entire system. A main unit is a computer that controls the displays (2), display settings, plays content on displays (2), updates displays (2) and updates itself, interacts with CMS (content management system), computer programs, and other member of the system necessary for its function. After each display (2) turns on and enters its own mode of operation, as described in patent application publication No. GB2613369A “Display system and method of operation”, the main unit through the rotary block control module sends commands to each rotary block to position displays (2) in one common rotation plane (12). When turning off the system, the main unit via the rotary block control module first gives a command to each rotary block to position all displays (2) in the parking position, and after a time gives a command to turn off all displays (2).

[0045] If any of the displays (2) detects an emergency mode, it sends this information via its communication channel to the main unit via optical fiber. Also, for the safety and reliability of signal transmission, this information is duplicated via the “IR interface” channel corresponding to the rotary block associated with this display. The main unit processes the received information and gives a command via the rotary block control module to bring each rotary block to the parking position in emergency mode. Also, the command to enter the parking position in emergency mode is transmitted from the main unit via the “discrete signal” channel. Essentially, the “discrete signal” channel exists only for protection in case of failure of the rotary block control module. The “discrete signal” is an electrical signal that carries a value of 0 or 1. Similarly, as mentioned above, information about the emergency mode is duplicated via the “IR interface” channel. It is processed by the rotary block and transmits information about the accident to other rotary blocks via the “CAN interface” channel. Whichever of the alarm signals in emergency mode will reach first, will be received by the rotary block actuator units. Each display has the ability to transmit information via IR interface. If there is any failure in the display operation, power failure, something hit the beams, something happened to the main unit - all such situations are processed as an emergency mode. For safety and reliability of the emergency mode, information about it is also transmitted via IR interface (see Fig. 11).

[0046] The IR interface is primarily needed so that the main unit can assign an individual address to each rotary block. This is a prerequisite for remotely adjusting the angle of the display mounting plane to the rotary block, because several rotary blocks by default can have the same address. It is not possible to change the address of the rotary block individually via the CAN interface, if there are several rotary blocks with identical addresses. Therefore, when setting up the display wall, when the display number is assigned, it assigns the rotary block address individually via the IR interface (see Fig. 11).

[0047] Fig. 12 illustrates the display support (3) and the display (2) with four rays (22) connected thereto, and Fig. 12 also illustrates angles (aXY; PZQ), under which the rotation axis (O) of the display (2) is tilted or inclined by means of the mechanism. The mechanism configured to incline the rotation axis (O) of the display (2) by a set-up angle (aXY) and by an adjustment angle (PZQ). The set-up angle (aXY) is the angle relative to the base plane axis (X) in the base plane (1). The adjustment angle (PZQ) is relative to the axis orthogonal to the base plane (1) in the plane formed by the axis orthogonal to the base plane (1) and the axis (Q) in the base plane (1) formed by the set-up angle (aXY). The inclination by the set-up angle (aXY) and by the adjustment angle (PZQ) is such that the rays (22) of adjacent displays (2) being out of set phase (P) of rotation do not collide. The mechanism is also configured to incline the rotation axis (O) of the display (2) by an adjustment angle (PZQ) so that after synchronization of phases (P) of rotations of the rays (22) for each display (2), the rotation planes (12) of the displays (2) are moved in one common plane without a collision of the rays (22) of adjacent displays (2). In the present embodiment of the invention the PoV display comprises four displays (2) arranged in two rows and two columns and in a distance from each other such that when all four rotation planes (12) of the displays (2) are in one common plane, the rotation planes (12) of the displays (2) interlap each other forming a common overlapping region (30). The phase synchronization module is configured to set the phase (P) of rotation of the rays (22) of each display (2) such that the rays (22) of diagonally arranged displays (2) pass through the common overlapping region (30) one after another without collision.

[0048] While the invention may be susceptible to various modifications and alternative forms, specific embodiments of which have been shown by way of example in the figures and have been described in detail herein, it should be understood that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention is defined by the following claims.

Claims

CLAIMS1. A persistence-of-vision display system comprising:- a base plane (1);- at least two displays (2), each display (2) having a respective display support (3) associated with the base plane (1), wherein each display (2) comprises one or more rays (22) including a plurality of light-emitting elements, and wherein each ray (22) is configured to rotate, defining a rotation plane (12) of the display (2) and a rotation axis (O) of the display (2) that is orthogonal to the rotation plane (12), and wherein rays (22) of overlapping displays (2) rotate in opposite directions;- a phase synchronization module configured to set a phase (P) of rotation of the rays (22) for each display (2) so that, during rotation, the rays (22) of adjacent displays (2) do not occupy a position in which the ray (22) of one display (2) obscures at least one lightemitting element of the ray (22) of an adjacent display (2); and- a mechanism configured to incline the rotation axis (O) of each display (2) by a set-up angle (aXY), which is defined relative to a base-plane axis (X) in the base plane (1), and by an adjustment angle (PZQ), which is defined relative to an axis orthogonal to the base plane (1) in the plane formed by that orthogonal axis and an axis ( ) in the base plane(1), wherein the axis ( ) is determined by the set-up angle (aXY). The mechanism is further configured so that rays (22) of adjacent displays (2), when out of phase (P) with one another, do not collide, and so that after synchronization of the phases (P) of rotation of the rays (22) for each display (2), the rotation planes (12) of the displays (2) are brought into a common plane without a collision of the rays (22) of adjacent displays (2).

2. The persistence-of-vision display according to claim 1, wherein the set-up angle (aXY) is determined based on parameters selected from the group consisting of: the number of displays (2), the configuration of the displays (2), the size of the rays (22) of the displays(2), and the distances between the rotation axes (O) of the displays (2), such that the rotation axis (O) of each display (2) can be inclined by the adjustment angle (0ZQ) to achieve a common rotation plane without the rays (22) of adjacent displays (2) colliding.

3. The persistence-of-vision display according to claim 1 or 2, wherein the display system comprises four displays (2) arranged in two rows and two columns, spaced apart fromeach other such that, when all four rotation planes (12) of the displays (2) are in a single common plane, the rotation planes (12) overlap in a common overlapping region (30), and wherein the phase synchronization module is configured to set the phase (P) of rotation of the rays (22) of each display (2) so that the rays (22) of diagonally arranged displays (2) pass through the common overlapping region (30) one after another without collision.

4. The persistence-of-vision display system according to any of claims 1 to 3, wherein the mechanism comprises:- a plurality of display supports (3), wherein each display (2) is mounted to its respective display support (3);- a plurality of rotation axles (4), wherein each display support (3) is fixed to the rotation axle (4) so that the rotation of the rotation axle (4) inclines the display supports (3) and respective displays (2) connected thereto;- a plurality of levers (4.1) coupled to said rotation axles (4) so that a movement of the lever (4.1) rotates the rotation axle (4);- a rod (4.2) hingedly connected and linked to the levers (4.1) so that a movement of rod (4.2) moves simultaneously all levers (4.1) that are connected to the rod (4.2); and- an actuator (4.3) operatively coupled to the lever (4.1) and / or rod (4.2) and / or rotation axle (4) and configured to move the lever (4.1) and / or rod (4.2) and / or rotation axle (4) to adjust the adjustment angle (PZQ) of the rotation axis (O) of the displays (2) so that rays (22) of the display (2) do not collide with the rays (22) of adjacent displays (2) preventing collision of the rays (22) of the displays (2) to each other during an initial rotation phase and before said displays (2) reach a synchronized rotation mode or in case of emergency stop.

5. The persistence-of-vision display system according to any of claims 1 to 4, wherein each display (2) further comprises:- a second axle (4.4) rotationally mounted to the display support (3) and positioned orthogonal to the rotation axle (4) of the display support (3);- a guide mechanism comprising a guide plate (4.5) having a slot (4.8) and a bar (4.7) slidably arranged within the slot (4.8), wherein the bar (4.7) is connected to the displaysupport (3) so that by the movement of the bar (4.7) within the slot (4.8), the display support (3) rotates around the second axle (4.4).

6. The persistence-of-vision display system according to any of claim 1 to 5, wherein the mechanism comprises a rotary block (6) associated with the display support (3), wherein the rotary block (6) comprise a motor, a gearbox, a sensor, and a control board, and wherein the rotary block (6) is configured to incline the rotation axis (O) of the display (2) by a set-up angle (aXY) and configured to further incline the rotation axis (O) of the display (2) by an adjustment angle (PZQ) through the plane formed at the set-up angle (aXY) so that the rays (22) of adjacent displays (2) do not collide to each other being out of set phase (P) of rotation of the rays (22), and configured to incline the rotation axis (O) of the display (2) by an adjustment angle (PZQ) so that after the set of phases (P) of rotations of the rays (22) for each display (2), the rotation plane (12) of the displays (2) are moved can be moved in one common plane without a collision of the rays (22) of adjacent displays (2).

7. A method for operating a persistence-of-vision display system according to any of claims 1 to 6, wherein the method comprises: a) positioning the displays (2) in a parking configuration, in which the rotation axis (O) of the display (2) are inclined by a set-up angle (aXY) and an adjustment angle (PZQ) in relation to initial rotation axis that is orthogonal to the base plane (1); b) initiating rotation of said displays (2) in a synchronized manner such that rotating rays (22) of the adjacent displays (2) do not occupy a position, in which the ray (22) of one display (2) obscures at least one light-emitting element of the ray (22) of adjacent display (2), wherein the rays (22) of displays (2) that overlap are rotated in opposite directions; c) adjusting the adjustment angle (PZQ) of the rotation axis (O) of the displays (2) until the rotation planes (12) of the displays (2) are moved in one common plane without a collision of the rays (22) of adjacent displays (2); and d) maintaining reached state, in result of which image gaps are significantly reduced or eliminated without a risk of collision.

8. The method according to Claim 7, wherein the method comprises the following steps: e) detecting an emergency condition from at least one of said displays (2)f) initiating a parking mode for said rotating displays (2) in response to the emergency condition; g) adjusting the adjustment angle (0ZQ) of the rotation axis (O) of the displays (2) until the rotation planes (12) of the displays (2) are moved out from one common plane; and h) maintaining a parking mode for said displays (2) upon power-down.

9. A method for operating a persistence-of-vision display system comprising a plurality of displays (2) mounted on independently adjustable rotary blocks (6), wherein the method comprises the following steps: a) positioning said rotary block (6) with their respective displays (2) in an initial parking configuration, in which the rotation axis (O) of the display (2) are inclined by a set-up angle (aXY) and an adjustment angle (PZQ) in relation to initial rotation axis that is orthogonal to the base plane (1); b) initiating rotation of said displays (2) in a synchronized manner such that rotating rays (22) of the adjacent displays (2) do not occupy a position, in which the ray (22) of one display (2) obscures at least one light-emitting element of the ray (22) of adjacent display (2), wherein the rays (22) of displays (2) that overlap are rotated in opposite directions; c) adjusting the adjustment angle (PZQ) of the rotation axis (O) of the displays (2) until the rotation planes (12) of the displays (2) are moved in one common plane without a collision of the rays (22) of adjacent displays (2); and d) maintaining reached state, in result of which image gaps are significantly reduced or eliminated without a risk of collision.

10. The method according to claim 9, wherein the method comprises the following steps: e) detecting an emergency condition from at least one of said displays (2) f) initiating a parking mode for said rotating displays (2) in response to the emergency condition; g) adjusting the adjustment angle (PZQ) of the rotation axis (O) of the displays (2) until the rotation planes (12) of the displays (2) are moved out from one common plane; and h) maintaining a parking mode for said displays (2) upon power-down.

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