Display device

Abstract

A display device comprising: a display module; a frame positioned at the rear of the display module; a step adjustment unit positioned between the display module and the frame and adjusting a gap between the display module and the frame; a worm shaft that provides a driving force to the step adjustment unit; and a control unit that controls the display module to output a marker at a position corresponding to the step adjustment unit, wherein a height difference or elevation difference between adjacent display modules can be adjusted without separating the display modules, thereby reducing installation time.

Description

display device

[0001] The present invention relates to a display device comprising a plurality of display modules.

[0002] Digital signage is a communication tool that can be used for corporate marketing, advertising, training effectiveness, and customer experience. It is a display device that provides specific information as well as broadcast programs in public places such as airports, hotels, hospitals, and subway stations.

[0003] Digital signage is a medium that displays various contents and commercial advertisements by installing display devices such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), and OLED (Organic Light Emitting Diode) on devices such as outdoor fixed locations or street furniture. Currently, it can be installed in all routes where the public moves, such as apartment elevators, subway stations, subways, buses, universities, banks, convenience stores, discount stores, and shopping malls.

[0004] When digital signage uses multiple display modules to form a single screen, there is a problem that the screen may be split or distorted due to the difference in height between adjacent display modules in the vertical or horizontal directions. Therefore, it is important to configure the front positions of adjacent display modules to be the same.

[0005] Conventionally, when a gap between adjacent display modules occurred, the display modules were separated, the height of the joints adjusted, and then re-joined. This method required repeated separation and rejoining of the display modules, and adjustments were made while the display modules were separated, resulting in poor accuracy.

[0006] The present invention may aim to provide a multi-display device capable of adjusting the height difference or the elevation difference between adjacent display modules to solve the aforementioned problem.

[0007] A display device is provided, comprising: a display module; a frame positioned at the rear of the display module; a step adjustment unit positioned between the display module and the frame and adjusting a gap between the display module and the frame; a worm shaft providing driving force to the step adjustment unit; and a control unit controlling the display module to output a marker at a position corresponding to the step adjustment unit.

[0008] The above control unit can control the display module to output only markers corresponding to the step adjustment unit that requires step adjustment.

[0009] The above control unit can control the display module so as not to output a marker corresponding to a step adjustment unit for which step adjustment has been completed.

[0010] The device further includes a displacement sensor that measures a step difference between the neighboring display modules, and the control unit can output a value measured by the displacement sensor to the display.

[0011] The step adjustment unit may include a holder magnet coupled to the back surface of the display module; a leveling screw extending from the holder magnet in the back direction and capable of adjusting the insertion amount into the frame; and a clutch module selectively providing the driving force of the worm shaft to the leveling screw, and may include a magnet jig that contacts the marker to switch the clutch module to an ON state.

[0012] The above leveling screw further includes a nut gear having a nut hole through which the leveling screw passes, and the clutch gear can rotate the nut gear when the clutch module is in an ON state to move the leveling screw in the forward and backward direction.

[0013] A worm wheel that rotates while engaging with the worm shaft; a clutch gear that is selectively coupled to the worm wheel and transmits the driving force of the worm wheel to the leveling screw; a clutch shaft that passes through the clutch gear; and a clutch head located at the front of the clutch shaft, wherein the display module can output the marker at the front of the clutch head.

[0014] When the clutch head moves forward by the magnetic force of the magnet jig, the clutch gear can be engaged with the worm wheel.

[0015] The above magnet jig optionally includes an electromagnet that provides magnetic force, and can be turned off when control of the step adjustment unit is terminated.

[0016] The above step adjustment units are arranged in a plurality of pieces spaced apart from each other in the longitudinal direction of the worm shaft, and the worm shaft can be arranged to mesh with the worm wheels of the plurality of step adjustment units.

[0017] According to another aspect of the present invention, a method for installing a display device is provided, comprising: installing a plurality of display modules in a frame; detecting a step difference between adjacent display modules; outputting a marker corresponding to a position of a step adjustment module on the display module; contacting a magnet jig with the marker; controlling the step adjustment module by rotating a worm shaft to adjust the front-rear position of the display module; and separating the magnet jig from the marker.

[0018] According to one embodiment of the present invention, the height difference or elevation difference between adjacently arranged display modules can be adjusted without separating the display modules, thereby reducing the installation time.

[0019] In addition, according to one embodiment of the present invention, it is possible to prevent an accident in which the display module is damaged during repeated attachment and detachment processes.

[0020] The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention belongs from the description below.

[0021] FIG. 1 is a drawing illustrating a display device according to an embodiment of the present invention.

[0022] FIG. 2 is a drawing illustrating a process of assembling a display module of a display device according to one embodiment of the present invention.

[0023] FIG. 3 is a drawing illustrating a step between display modules of a display device according to one embodiment of the present invention.

[0024] Figure 4 is an enlarged view showing part A of Figure 2.

[0025] FIG. 5 is a drawing illustrating a step adjustment unit of a display device according to one embodiment of the present invention.

[0026] FIG. 6 is a perspective view showing the OFF state of the step adjustment unit of a display device according to one embodiment of the present invention.

[0027] FIG. 7 is a cross-sectional view showing the OFF state of the step adjustment unit of a display device according to one embodiment of the present invention.

[0028] FIG. 8 is a perspective view showing the ON state of the step adjustment unit of a display device according to one embodiment of the present invention.

[0029] FIG. 9 is a cross-sectional view showing the ON state of the step adjustment unit of a display device according to one embodiment of the present invention.

[0030] FIG. 10 is a cross-sectional view showing the ON state of a step adjustment unit of a display device according to another embodiment of the present invention.

[0031] FIG. 11 is a front perspective view of a clutch gear of a display device according to one embodiment of the present invention.

[0032] FIG. 12 is a schematic diagram illustrating a control method of a step adjustment unit of a display device according to one embodiment of the present invention.

[0033] FIG. 13 and FIG. 14 are drawings showing a state in which a marker guiding the control of the step adjustment unit of the display device of the present invention is output.

[0034] FIG. 15 is a flowchart illustrating a control method of a step adjustment unit of a display device according to one embodiment of the present invention.

[0035] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components will be given the same reference numbers and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably only for the convenience of writing the specification, and do not in themselves have distinct meanings or roles. In addition, when describing the embodiments disclosed in this specification, if it is determined that a specific description of a related known technology may obscure the gist of the embodiments disclosed in this specification, a detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

[0036] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0037] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0038] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0039] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0040] Hereinafter, a light emitting diode (LED) panel is used as an example for the display panel, but the display panel applicable to the present invention is not limited to an LED panel, and may also be an organic light emitting diode (OLED), a plasma display panel (PDP), a field emission display (FED), or a liquid crystal display (LCD).

[0041] FIG. 1 is a drawing illustrating a display device (1000) according to an embodiment of the present invention, and FIG. 2 is a drawing illustrating a process of assembling a display module of the display device (1000) according to an embodiment of the present invention.

[0042] Referring to FIGS. 1 and 2, a multi-display device (1000) may include a display module (100) capable of displaying an image, a frame (200) supporting the display module (100), and a step adjustment unit (250) mounted between the display module (100) and the frame (200) to adjust the gap therebetween.

[0043] The display module (100) may include a display panel and a module cover positioned at the rear of the display panel. The module cover may be positioned at the rear of the display panel to protect the rear of the display panel from the outside, and may include a displacement adjustment unit for attachment to a frame and a connecting portion to which it is attached.

[0044] A display panel may include a plurality of pixels (R, G, B). The plurality of pixels (R, G, B) may be formed in each area where a plurality of data lines and a plurality of gate lines intersect. The plurality of pixels (R, G, B) may be arranged or arranged in a matrix form.

[0045] For example, a plurality of pixels (R, G, B) may include a red (Red, hereinafter referred to as 'R') sub-pixel, a green (Green, 'G') sub-pixel, and a blue (Blue, 'B') sub-pixel. The plurality of pixels (R, G, B) may further include a white (White, hereinafter referred to as 'W') sub-pixel.

[0046] The side of the display module (100) that displays an image may be referred to as the front or front. When the display module (100) displays an image, the side from which the image cannot be observed may be referred to as the rear or back. When viewing the display module (100) from the front or front, the upper side may be referred to as the upper side or upper surface. Similarly, the lower side may be referred to as the lower side or lower surface. Similarly, the right side may be referred to as the right side or right surface, and the left side may be referred to as the left side or left surface.

[0047] The display module (100) may be arranged so that multiple display modules (100) are adjacent to each other in the vertical direction or the left-right direction. The display module (100) of the present embodiment may have a form in which a plurality of display modules (100) are arranged side by side in the horizontal direction and are long in the vertical direction.

[0048] The frame (200) may be arranged at the rear of a plurality of display modules (100). The front of the frame (200) may face the rear of the display module (100). The frame (200) may be arranged to correspond to the display module (100) in the thickness direction or the front-back direction of the display module (100). The frame (200) may be formed in a picture frame shape with an open central area.

[0049] The frame (200) may have a size N times the size of the display module (100) so that multiple display modules (100) can be mounted thereon. For example, in the display device (1000) of the embodiment illustrated in FIG. 2, the length of the upper side of the frame (200) may be substantially equal to the length obtained by multiplying four of the display modules (100). However, this is not limited thereto. The frame (200) may be formed to be longer or shorter than the display module (100) depending on the external environment, such as the building or wall in which it is installed.

[0050] In FIGS. 1 and 2, it is illustrated that the display module is formed of one frame (200), but this is not limited thereto. The frame (200) may include a plurality of frames with a size corresponding to the size of the display module.

[0051] FIG. 3 is a diagram illustrating a step difference between display modules of a display device (1000) according to one embodiment of the present invention. Adjacent display modules may have different thicknesses, or their thicknesses may differ during the frame assembly process. Alternatively, a height difference on the wall on which they are installed may occur, resulting in a step difference between display modules, as illustrated in FIG. 3 .

[0052] A step adjustment unit (250) is required to adjust the distance between the display module (100) and the frame (200) to adjust the step between adjacent display modules.

[0053] A step adjustment unit (250) can be placed between a plurality of display modules (100) and a frame (200). The step adjustment unit (250) can be mounted on the frame (200) in the thickness direction of the display module (100). The step adjustment unit (250) mounted on the front of the frame (200) can be attached to the rear of the display module (100).

[0054] The step adjustment unit (250) can adjust the distance between the rear surface of the display module (100) and the front surface of the frame (200). There may be a plurality of step adjustment units (250). The step adjustment units (250) can be placed at each end of the frame (200).

[0055] The step adjustment unit (250) finely adjusts the protrusion amount from the frame (200) to adjust the distance between the frame (200) and the display module (100). However, in the conventional method, the step adjustment unit (250) is located on the back of the display module (100), so that the display module (100) must be separated from the frame (200) to adjust the step adjustment unit (250). In the conventional method, the adjustment work of the step adjustment unit (250) is cumbersome, and it is difficult to accurately determine the step between adjacent display modules (100).

[0056] Accordingly, the present invention provides a display device (1000) capable of adjusting a step adjustment unit (250) while the display module (100) is coupled to a frame (200).

[0057] FIG. 4 is an enlarged view showing part A of FIG. 2, in which a step adjustment unit (250) is illustrated. The step adjustment unit (250) of the present invention is positioned on the frame (200) and may be positioned on the rear end of the display module (100). The step adjustment unit (250) may include a holder magnet (258) coupled with the display module (100). The holder magnet (258) protrudes forward from the frame (200) and is coupled to the frame (200) through a leveling screw (257).

[0058] The protrusion amount of the holder magnet (258) can be adjusted by rotating the leveling screw (257) or rotating the nut gear (256) into which the leveling screw (257) is inserted. In the past, the display module (100) was removed and the holder magnet (258) was rotated to adjust the insertion amount of the leveling screw (257) into the frame (200). However, the present invention uses a worm shaft (260) extending vertically to the leveling screw (257) to rotate the nut gear (256) into which the leveling screw (257) is inserted, thereby adjusting the forward / backward position of the leveling screw (257).

[0059] FIG. 5 is a drawing illustrating a step adjustment unit (250) of a display device (1000) according to one embodiment of the present invention. The step adjustment unit (250) may be arranged at a predetermined interval along the end of the display module (100).

[0060] The worm shaft (260) can be connected to each step adjustment unit (250) one by one, but it is difficult for the user to directly adjust the worm shaft (260) except for the end of the display module (100). Therefore, as shown in FIG. 5, a worm shaft (260) that is extended long enough to be connected to multiple step adjustment units (250) at the same time can be used.

[0061] A motor (265, see Fig. 12) for rotating the worm shaft (260) is provided at the end of the worm shaft (260) extended to the end of the display module (100), or the user can manually rotate the worm shaft (260) to adjust the protrusion amount of the leveling screw (257) of the step adjustment unit (250).

[0062] However, in order to individually control only a specific step adjustment unit (250) using a worm shaft (260) combined with a plurality of step adjustment units (250), a selective synchronization structure that selectively synchronizes the worm shaft (260) and the leveling screw (257) is required. Hereinafter, such a selective synchronization structure is referred to as a clutch module (251, 252, 253, 254, 255).

[0063] The step adjustment unit (250) includes a worm wheel (255) that rotates while meshing with a worm shaft (260), and the clutch module can selectively transmit the rotational force of the worm wheel (255) that rotates when the worm shaft (260) rotates to a nut gear (256) in which a leveling screw (257) is inserted.

[0064] The state in which the clutch module drives the step adjustment unit (250) by transmitting the rotational force of the worm wheel (255) that rotates when the worm shaft (260) rotates to the leveling screw (257) is referred to as the ON state, and the state in which the clutch module is not synchronized with the worm shaft (260) and therefore cannot transmit the rotational force of the worm wheel (255) to the leveling screw (257) is referred to as the OFF state.

[0065] FIG. 6 is a perspective view showing an OFF state of a step adjustment unit (250) of a display device (1000) according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view showing an OFF state of a step adjustment unit (250) of a display device (1000) according to an embodiment of the present invention.

[0066] FIG. 8 is a perspective view showing the ON state of the step adjustment unit (250) of the display device (1000) according to one embodiment of the present invention, and FIG. 9 is a cross-sectional view showing the ON state of the step adjustment unit (250) of the display device (1000) according to one embodiment of the present invention.

[0067] Referring to FIG. 7, the clutch module may include a worm wheel (255) that rotates while engaging with a worm shaft (260) and a clutch gear (253) that transmits the driving force of the worm wheel (255) to a leveling screw (257).

[0068] The clutch gear (253) can move forward and backward and be coupled to the nut gear (256). When the clutch gear (253) moves to a position where it engages with the teeth of the nut gear (256), it can receive the rotational force of the worm wheel (255) to rotate the nut gear (256). At this time, the clutch gear (253) can move forward and be coupled to the back surface of the worm wheel (255) as illustrated in FIG. 9 in order to stably transmit the rotational force of the worm wheel (255).

[0069] The clutch gear (253) moves forward and backward and can be selectively engaged with the nut gear (256) and the worm wheel (255), and in the OFF state, the clutch gear (253) is separated from the nut gear (256) and the worm wheel (255).

[0070] In this embodiment, the worm wheel (255) and the clutch gear (253) are arranged in the front-rear direction, and can also be arranged so as to be adjacent to each other so as to mesh with the teeth of the worm wheel (255) and rotate. In this embodiment, when the clutch module is in the ON state, the worm wheel (255), the clutch gear (253), and the nut gear (256) can be positioned at the same height in the front-rear direction and mesh with each other to be linked.

[0071] A clutch shaft (252) and a clutch head (251) may be included to control the clutch gear (253) to move forward and backward. The rear end of the clutch shaft (252) is coupled to the clutch gear (253), and the clutch head (251) is located at the front end of the clutch shaft (252).

[0072] The clutch head (251) includes a metal material that is attracted to a magnet and can move forward when a magnetic force is applied from the front. When a magnet jig (270) including a magnet is positioned in front of the display module (100), the clutch head (251) can move toward the display module (100) by the magnetic force of the magnet jig (270).

[0073] The magnet of the magnet jig (270) may be a permanent magnet, or an electromagnet that selectively generates magnetic force when power is supplied. In this case, the clutch module can be switched to the OFF state simply by turning off the power to the electromagnet without removing the magnet jig (270) from the display module (100).

[0074] FIG. 10 is a cross-sectional view showing the ON state of the step adjustment unit (250) of the display device (1000) according to another embodiment of the present invention, in which the leveling screw (257) is inserted into the nut gear (256) to the maximum extent and the leveling screw (257) protrudes from the frame (200) to the shortest extent.

[0075] If the position of the clutch head (251) protrudes further forward than the holder magnet (258) while the clutch gear (253) is engaged with the nut gear (256), the clutch gear (253) may not be engaged with the nut gear (256) while the leveling screw (257) protrudes short, as shown in FIG. 10.

[0076] Regardless of the length of the leveling screw (257), when the clutch gear (253) is switched to the ON state coupled with the nut gear (256), the clutch head (251) must be in contact with the back surface of the display module (100) as shown in FIG. 10 or not in contact with the back surface of the display module (100) as shown in FIG. 9.

[0077] That is, when the clutch module switches from the OFF state to the ON state, the movement distance of the clutch gear (253) must be shorter than the distance between the back surface of the display module (100) and the clutch head (251).

[0078] Therefore, in the ON state where the clutch gear (253) is coupled with the nut gear (256) as shown in FIG. 9 or FIG. 10, the protrusion amount (a) of the clutch shaft (252) from the frame (200) must be equal to or less than the protrusion amount (b1 or b2) of the leveling screw (257) from the frame (200) (a≤b1, b2). Therefore, the movement distance (a) of the clutch module must be equal to or less than the minimum protrusion length (b2) of the leveling screw (257) (a≤b2).

[0079] In order to stably transmit the rotational power of the worm wheel (255) when the clutch gear (253) is coupled to the worm wheel (255) as shown in FIGS. 9 and 10, a clutch protrusion (2525) protruding from the back surface of the worm wheel (255) and a clutch groove (2535) formed on the front surface of the clutch gear (253) to engage with the clutch protrusion (2525) may be included. The clutch groove (2535) may be formed on the worm wheel (255) and the clutch protrusion (2525) may be formed on the clutch gear (253).

[0080] The clutch home (2535) and the clutch projection (2525) may include a straight portion (2535a) so that the worm wheel (252) can rotate together when the worm wheel (255) rotates after being combined.

[0081] Fig. 11 is a front perspective view of a clutch gear (253) of a display device (1000) according to one embodiment of the present invention, showing a clutch groove (2535). The clutch groove (2535) may have a polygonal shape, or may be formed in a circular shape with a portion formed by a straight line.

[0082] The clutch groove (2535) is configured symmetrically so that the clutch gear (253) can be easily engaged with the worm wheel (252) regardless of the arrangement of the worm wheel (255). The clutch groove (2535) of Fig. 11 is symmetrical in a 180° section, but the straight section (2535a) can also be arranged in a 90° or 60° section.

[0083] Since the clutch shaft (252) is fastened to the clutch groove (2535), a shaft hole (2533) into which the clutch shaft (252) is coupled can be formed in the clutch groove (2535). The clutch gear (253) moves forward when the clutch head (251) moves forward by the magnet jig (270), and the clutch protrusion (2525) of the worm wheel (255) is inserted into the clutch groove (2535) of the clutch gear (253). The clutch gear (253) rotates by receiving the rotational force of the worm wheel (255), and the nut gear (256) rotates to move the leveling screw (257) in the forward and backward directions.

[0084] The clutch shaft (252) can serve as a rotation axis of the worm wheel (255) and the clutch gear (253), and can be fixed to both the clutch shaft (252) and the worm wheel (255) to rotate together, or can move only in the forward and backward direction without rotating.

[0085] When the clutch shaft (252) is fixed to both the worm wheel (255) and the clutch gear (253), the clutch shaft (252) can transmit the rotational power of the worm wheel (255) to the clutch gear when the worm wheel (255) rotates. In this case, when the clutch module is in the OFF state and the worm wheel (255) rotates, both the clutch gear (253) and the clutch shaft (252) rotate. Since the clutch gear (253) is not fastened to the nut gear (256), the leveling screw (257) does not move.

[0086] However, in this case, since the driving force of the worm shaft (260) is unnecessarily consumed, the worm wheel (255) and the clutch shaft (252) do not rotate together, and only the worm wheel (255) can be configured to rotate around the clutch shaft (252). Since the worm shaft (260) is not fixed to the worm wheel (255), the rotational force of the worm wheel (255) is not transmitted to other parts in the OFF state.

[0087] As shown in Fig. 8, when the clutch gear (253) is engaged with the worm wheel (255), the teeth (2531) of the clutch gear (253) mesh with the teeth of the nut gear (256) coupled with the leveling screw (257). Therefore, the rotation of the worm wheel (255) is transmitted to the nut gear (256) through the clutch gear (253).

[0088] After the display module (100) has moved a desired amount, the magnet jig (270) can be moved away from the front of the display module (100) to stop the movement of the leveling screw (257).

[0089] When the magnet jig (270) is separated from the display module (100), the clutch gear (253) of the clutch module is separated from the worm wheel (255), and the clutch module is switched to the OFF state. At this time, a restoration spring (254) that presses the clutch gear (253) in the rearward direction may be further included to provide force for the clutch gear (253) to move backward.

[0090] In this embodiment, the restoration spring (254) can be positioned between the worm wheel (255) and the clutch gear (253), and can be compressed when the clutch gear (253) and the worm wheel (255) are coupled as shown in FIG. 9, and can be tensioned when they are spaced apart as shown in FIG. 7.

[0091] The magnetic force of the magnet jig (270) provides a magnetic force greater than the elasticity of the restoration spring (254), so that the magnet jig (270) can move the clutch head (251) forward to compress the restoration spring (254).

[0092] The restoration spring (254) may not be coupled to at least one side of the worm wheel (255) or the clutch gear (253). When another step adjustment unit (250) is driven, the worm wheel (255) of the step adjustment unit (250) that is turned off rotates, so the rotational force of the worm wheel (255) is prevented from being transmitted to the clutch gear (253) through the restoration spring (254).

[0093] Fig. 12 is a schematic diagram illustrating a method for controlling a step adjustment unit (250) of a display device (1000) according to an embodiment of the invention. As described above, the worm shaft (260) is extended to be able to control a plurality of step adjustment units (250), and a plurality of step adjustment units (250) may be arranged along the longitudinal direction of the worm shaft (260).

[0094] Only the step adjustment unit (250a) that has the clutch module turned ON by the magnet jig (270) is synchronized with the worm shaft (260) so that the clutch gear (253) rotates and drives the leveling screw (257), and the remaining step adjustment units (250b) are not driven even if the worm shaft (260) rotates.

[0095] The display device (100) of the present invention can control the step adjustment unit (250) without separating the display module (100), but has a problem in that it is difficult for a user to find the position of the clutch head (251) of the step adjustment unit (250) in front of the display module (100).

[0096] Accordingly, the display device (1000) of the present invention outputs a marker (281) indicating the position of the clutch head (251) of the step adjustment unit (250) on the front of the display module (100), so that the user can easily recognize the contact position of the magnet jig (270).

[0097] The user can visually check the step between neighboring display modules (100) and adjust the step by contacting the magnet jig (270) with the marker (281) corresponding to the step adjustment unit (250) of the part requiring step adjustment, and then rotating the worm shaft (260).

[0098] The marker (281) may be displayed on the screen in white or color, or when the display module (100) is brightly lit for aging after the display module (100) is installed in the frame (200), the marker (281) may be displayed on the screen of the display module (100) in a dark color.

[0099] Alternatively, the display device (1000) may further include a displacement sensor (240) that measures the step difference between adjacent display modules (100). As illustrated in FIG. 4, the displacement sensor (240) may be an optical sensor, such as an ultrasonic or laser, built into the back surface or frame (200) of the display module (100) to measure the step difference between the display modules (100).

[0100] Alternatively, since the displacement sensor (240) is no longer used after installation, a jig-shaped displacement sensor (not shown) installed on the front of the display module (100) can be used only when the display module (100) is installed on the frame (200).

[0101] FIG. 13 and FIG. 14 are drawings showing a state in which a marker (281) guiding the control of the step adjustment unit (250) of the display device (1000) of the present invention is output.

[0102] As illustrated in Fig. 13, the control unit (180) can output a value (282) measured by the displacement sensor (240) to the display module (100) to be adjusted by the step adjustment unit (250). The displacement sensor (240) can detect not only the step between neighboring display modules (100) but also the inclination of the display module (100) to guide one display module (100) to be installed so that it forms a flat surface.

[0103] Instead of always displaying all markers (281), markers (281) corresponding to step adjustment units (250) whose adjustment has been completed as shown in FIG. 14 may no longer be output, or markers (281) corresponding to step adjustment units (250) whose heights are the same as those of neighboring display modules (100) and for which adjustment is not necessary may not be output.

[0104] Fig. 15 is a flowchart illustrating a control method of a step adjustment unit (250) of a display device (1000) according to an embodiment of the present invention. After installing a display module (100) on a frame (200) (S1100), the step difference with respect to an adjacent display module (100) can be detected with the naked eye or using a displacement sensor (240) (S1200).

[0105] The control unit can output a marker (281) indicating the position of the clutch head (251) of the step adjustment unit (250) on the display module (100) (S1300, see FIG. 13). At this time, the step requiring adjustment detected by the displacement sensor (240) can be displayed numerically on the display module (100).

[0106] The magnet jig (270) is brought into contact with the marker (281) at the position where the step adjustment is required, and the clutch unit of the corresponding step adjustment unit (250) is turned ON (S1400, see Fig. 8). When the worm shaft (260) is driven (S1500), only the leveling screw (257) of the step adjustment unit (250) whose clutch unit has been turned ON can be moved to adjust the step of the display module (100). When the worm shaft (260) rotates by the required amount of movement and the step adjustment is completed (S1600), the magnet jig (270) can be moved away from the display module (100) to turn the clutch unit OFF (S1700).

[0107] If multiple step adjustment units (250) need to be adjusted, the magnet jig (270) can be moved to another marker (281) and steps S1400 to S1700 can be repeated.

[0108] As described above, according to one embodiment of the present invention, the height difference or the height difference between adjacent display modules (100) can be adjusted without separating the display modules (100), thereby reducing the installation time.

[0109] In addition, according to one embodiment of the present invention, it is possible to prevent an accident in which the display module (100) is damaged during repeated attachment and detachment processes.

[0110] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. Display module; A frame located at the rear of the above display module; A step adjustment unit positioned between the display module and the frame and adjusting the gap between the display module and the frame; A worm shaft providing driving force to the above step adjustment unit; and A display device including a control unit that controls the display module to output a marker at a position corresponding to the step adjustment unit.

2. In paragraph 1, The above control unit A display device characterized in that the display module is controlled to output only markers corresponding to a step adjustment unit requiring step adjustment.

3. In paragraph 1, The above control unit A display device characterized in that the display module is controlled so as not to output a marker corresponding to a step adjustment unit for which step adjustment has been completed.

4. In paragraph 1, Further comprising a displacement sensor for measuring the step between the adjacent display modules, The above control unit A display device characterized in that it outputs the value measured by the displacement sensor to the display.

5. In paragraph 1, The above step adjustment unit A holder magnet that is attached to the back surface of the above display module; A leveling screw extending from the holder magnet in the rear direction and capable of adjusting the amount of insertion into the frame; and Includes a clutch module that selectively provides the driving force of the worm shaft to the leveling screw, A display device characterized by including a magnet jig that contacts the marker to turn the clutch module ON.

6. In paragraph 5, Further comprising a nut gear including a nut hole through which the leveling screw penetrates, A display device characterized in that the clutch module rotates the nut gear when the clutch module is in the ON state to move the leveling screw in the forward and backward direction.

7. In paragraph 5, A worm wheel that rotates while meshing with the above worm shaft; A clutch gear that is selectively coupled to the worm wheel and transmits the driving force of the worm wheel to the leveling screw; a clutch shaft passing through the clutch gear; and Includes a clutch head located at the front of the clutch shaft, A display device characterized in that the display module outputs the marker in front of the clutch head.

8. In paragraph 7, A display device characterized in that when the clutch head moves forward by the magnetic force of the magnet jig, the clutch gear engages with the worm wheel.

9. In paragraph 5, The above magnet jig Optionally includes an electromagnet that provides magnetic force; A display device characterized in that the power is turned off when the control of the step adjustment unit is terminated.

10. In paragraph 1, The above step adjustment unit is arranged in multiple units spaced apart in the longitudinal direction of the worm shaft, A display device characterized in that the above worm shaft is arranged to mesh with the worm wheels of a plurality of the above step adjustment units.

11. Step of installing multiple display modules on the frame; A step of detecting a step difference between adjacent display modules; A step of outputting a marker corresponding to the position of the step adjustment module on the above display module; A step of contacting a magnet jig to the above marker; A step of adjusting the forward and backward position of the display module by controlling the step adjustment module by rotating the worm shaft; and A method for installing a display device, comprising the step of separating the magnetic jig from the marker.

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