KR100952405B1 - Electric sign board - Google Patents

Abstract

PURPOSE: By automatically controlling the scan direction of the light emitting diode to the desired pattern the display panel improves the power efficiency. CONSTITUTION: A case(10) comprises the opening formed in one side. The light emitting diode socket member(22) comprises the joint part(24) preparing in the other side of the connection unit and the connection unit electrically connected with one or more light emitting diodes(21), and the light emitting diode with the sphere shape. A plurality of point source of light assemblies comprises a plurality of point source of light assemblies expressing the predetermined character or image according to the flash of the light emitting diode and input unit. A point source of light assembly supporting part(30) is fixed to the case. A plurality of fitting holes is formed in the point source of light assembly supporting part. The circuit board(40) comprises a plurality of point source of light assemblies and the electrically connected wirings. The controller(50) controls light emitting diodes.

Description

Electric sign board

The present invention relates to an electronic display plate, and more particularly to an electronic display plate that can adjust the irradiation direction of the light emitting diode to ensure visibility even at various angles.

Light emitting diodes are used as devices for indoor and outdoor announcements, and are positioned as various information transfer media.They have relatively low power consumption, can express various colors and images, and have a long life compared to neon lights. . In recent years, high-definition, large-scale electronic displays using a plurality of light emitting diodes have been developed and produced.

By the way, the light output through the normal light emitting diode has a strong characteristic of straightness, it should be far beyond the minimum visible distance to identify the image information output through the advertising billboard installed in a high place, such as the roof of the building. . In general, it is difficult for a person located on the ground adjacent to a building to recognize image information output from an advertisement signboard on a roof of a building, and this difficulty is particularly severe during the day than at night. In addition, since most of the output is lost, there is a negative problem in terms of efficiency.

An object of the present invention is to provide an electronic display board with improved visibility and advertising efficiency.

Display board according to an embodiment of the present invention for achieving this purpose is a case formed with an opening on one side; At least one light emitting diode, at least one connection portion to which the at least one light emitting diode is electrically connected, and at least one joint portion formed at a spherical shape on the other side of the connection portion, the light emitting diode socket member made of a resin material, and the power source or the light emitting diode as A plurality of point light source assemblies having an input part provided at one side of the light emitting diode socket member to supply an electrical signal, and arranged at regular intervals so that a predetermined letter or image is expressed according to the blinking of the light emitting diode; A point light source assembly support part fixed to the case and having a plurality of fitting holes formed therein, wherein each of the plurality of point light source assemblies are fitted so as to allow movement of two degrees of freedom; A circuit board on which wirings electrically connected to the plurality of point light source assemblies are printed; And a controller configured to control the plurality of light emitting diodes such that each of the light emitting diodes provided in the plurality of point light source assemblies blinks according to an electrical signal, wherein the light emitting diodes are fitted into fitting holes of the point light source assembly support. The point light source assemblies may be moved in two degrees of freedom to adjust the irradiation direction of light emitted from the light emitting diode of the point light source assembly.

In addition, the connection portion of the light emitting diode socket member forms a cup shape, and after the light emitting diode is installed in the cup-shaped connection portion, the connection portion may be filled with epoxy or silicon.

In addition, the light emitting portion of the light emitting diode may be accommodated in more than half of the cup-shaped connecting portion.

In addition, a polyurethane-based sealing resin may be applied to the inner surfaces of the plurality of fitting holes of the point light source assembly.

In addition, the electro-optical plate according to an embodiment of the present invention further includes a radiation direction adjusting plate having a plurality of through holes, wherein each of the plurality of light emitting diodes of the plurality of point light source assemblies is the plurality of through holes of the radiation direction adjusting plate. The irradiation direction adjustment plate is installed in the front portion of the point light source assembly support portion, and the irradiation direction adjustment plate is moved up, down, left and right so as to pass through a corresponding through hole among the plurality of point light source assemblies. The irradiation direction of the diodes can be adjusted.

In addition, the irradiation direction adjustment plate is provided with a plurality of installation holes, the point light source assembly support portion has a plurality of installation groove groups coupled to the plurality of installation holes in the front portion, the plurality of installation groove groups Each of the plurality of installation holes is provided, each of the plurality of installation holes is selectively coupled to one of the plurality of installation grooves of the corresponding installation groove group, so that the irradiation direction adjustment plate is the upper, the point light source assembly support, It can be coupled to the position moved to the left, left, and right.

Further, at least one elastic body supporting the irradiation direction adjusting plate in at least one of up, down, left and right directions, and rotates the irradiation direction adjusting plate against the elastic force of the at least one elastic body. One or more cam members for moving in at least one direction may be further included.

The controller may control the at least one cam member so that the irradiation direction of the light emitting diodes of the plurality of point light source assemblies may be automatically controlled in a predetermined pattern.

The input unit of the point light source assembly may include a first assembly side terminal and a second assembly side terminal provided at a joint portion of the socket member, and the first assembly side terminal may be provided at a fitting hole of the point light source assembly support unit. And a second fitting hole terminal corresponding to the second fitting hole terminal corresponding to the second assembly side terminal, wherein the point light source assembly is fitted into a fitting hole of the point light source assembly support part, thereby performing two degree of freedom movement. In the meantime, the first assembly side terminal and the first fitting side terminal may be connected to each other, and the second assembly side terminal and the second fitting side terminal may be connected to each other.

In addition, the electronic sign according to an embodiment of the present invention is a case formed with an opening on one side; A circuit board accommodated in and fixed to the case; A plurality of light emitting diodes electrically connected to the circuit board and arranged and blinking at regular intervals to form a predetermined character or image; A plurality of optical guides of elastic material attached to front surfaces of each of the plurality of light emitting diodes; An irradiation direction adjusting plate having a plurality of through-holes through which one end of each of the plurality of light guides penetrates, and moved upward, downward, left and right with respect to the plurality of light emitting diodes; And a controller configured to control the plurality of light emitting diodes such that the plurality of light emitting diodes blink in accordance with an electrical signal, and are emitted from the plurality of light emitting diodes by moving up, down, left, and right of the irradiation direction adjusting plate. The irradiation direction of the light can be adjusted.

In the display board according to the embodiment of the present invention, the irradiation direction of the light emitting diode may be actively adjusted according to the installation height of the display board and the ambient brightness, thereby improving visibility.

In addition, it is possible to concentrate the light of the light emitting diode in a desired direction, there is an effect that the power efficiency is improved.

In addition, it is possible to automatically control the irradiation direction of the light emitting diode in a desired pattern, the effect of focusing attention is high bar advertising effect is increased.

1 is a perspective view showing the appearance of an electric sign according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA of FIG. 1.
3A is a perspective view illustrating the point light source assembly of FIG. 1.
Figure 3b is a perspective view of a point light source assembly according to another embodiment of the present invention.
Figure 3c is a perspective view showing a point light source assembly according to another embodiment of the present invention.
4A is a perspective view illustrating an appearance of an electric sign board according to another exemplary embodiment of the present invention.
4B is a perspective view illustrating a state in which the irradiation direction adjusting plate is coupled to the light emitting plate of FIG. 4A.
4C is a perspective view illustrating a state in which the irradiation direction adjusting plate of FIG. 4B is moved and coupled.
5A is a perspective view illustrating an electronic display panel according to another embodiment of the present invention.
5B and 5C are diagrams showing the operation of the irradiation direction adjusting plate of the electronic display plate of FIG. 5A.
6 is a perspective view illustrating an electric sign according to another embodiment of the present invention.
FIG. 7A is a perspective view illustrating the light emitting diode and the light guide of FIG. 6.
7B is a perspective view illustrating a state in which the light emitting diodes and the light guide of FIG. 6 are attached to each other.
8A and 8B are front and side cross-sectional views showing that the irradiation direction of the light emitting diode is adjusted forward and downward in the display panel of FIG. 6.
9 is a view showing an electrical connection structure between the fitting point of the point light source assembly and the point light source assembly support according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the appearance of an electric sign according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line A-A of Figure 1, Figure 3a is a perspective view showing the point light source assembly of Figure 1;

As shown in FIGS. 1 to 3A, the electronic display plate of the present invention includes a case 10, a plurality of point light source assemblies 20, a point light source assembly support 30, a circuit board 40, and a controller. It consists of 50.

The case 10 may form an appearance of an electronic sign and may be made of iron, aluminum, a resin material, or the like. The opening part 11 is formed in the front part of the case 10, and the light emitting diode 21 mentioned later is exposed through the opening part 11 to the front surface. A protective plate (not shown) made of a transparent material may be attached to the front portion of the case 10 to protect components such as a light emitting diode.

The point light source assembly 20 includes a light emitting diode 21, a light emitting diode socket member 22, and an input unit 27. The point light source assembly 20 includes a light emitting diode 21 so that a predetermined character or image is displayed according to the blinking of the light emitting diode 21. The front part is arranged in plurality at regular intervals.

A light emitting diode (LED) is a semiconductor device that emits light in general, and emits light of various colors such as red, green, and blue. Of course, the point light source of the present invention is not limited to the light emitting diode, in addition to the point light source of various forms may be used. Reference numeral 21a denotes a light emitting part for emitting light, and reference numeral 21b denotes lead frames for supplying power to the light emitting diodes.

The light emitting diode socket member 22 includes a connecting portion 23 to which the light emitting diodes 21 are electrically connected to one side, and a joint portion 24 provided in a spherical shape on the other side of the connecting portion 23. Is done. Of course, in addition to the resin material may be made of a non-conductive ceramic material. Inside the light emitting diode socket member 22 is embedded a conductive plate 26 from the connecting portion 23 to the joint portion 24, and one end 26a of the conductive plate 26 is formed of a lead frame of the LED. It is electrically connected to 21b) and the other end 26b of the conducting plate 26 is electrically connected to the input unit 27.

The connection part 23 of the light emitting diode socket member 22 is cup-shaped, and after the light emitting diode 21 is installed in the cup-shaped connection part 23, the waterproofing material 25 is filled in the connection part. The waterproof member 25 may be epoxy or silicone.

The input unit 27 is provided on one side of the light emitting diode socket member 22 to supply power or an electrical signal to the light emitting diode 21, and the input unit 27 of the present embodiment is provided in the form of a wire. As described above, the input unit 27 is electrically connected to the conductive plate 26 embedded in the light emitting diode socket member 22. In order to supply power to the conductive plate 26, one side of the input unit 27 is connected to a circuit board 40 on which wirings are printed. In this embodiment, the input unit 27 and the circuit board 40 are connected to be detachable by the coupling of the female pin 27a and the male pin 40a. Of course, the input member may be fixedly connected to the circuit board by soldering or the like.

The point light source assembly support part 30 is fixedly supported by the case 10, and the point light source assembly support part 30 includes a plurality of fitting holes in which each of the plurality of point light source assemblies 20 is fitted so as to allow two degrees of freedom. 31) are formed. That is, the spherical joint portion 24 of the light emitting diode socket member 22 of the point light source assembly 20 is fitted into the fitting hole 31 of the point light source assembly support 30, and the point light source assembly 20 is fitted. The light emitting diode socket member 22 can be rotated about two axes. Polyurethane-based sealing resin () is applied to the inner surfaces of the plurality of fitting holes 31 of the point light source assembly 20, thereby preventing foreign substances such as water from entering the circuit board side. Reference numeral 12 denotes a sealing member provided between the case 10 and the point light source assembly support 30.

Reference numeral 50 includes a controller for controlling the plurality of light emitting diodes 21 so that each of the light emitting diodes 21 provided in the plurality of point light source assemblies 20 blinks according to an electrical signal. According to the electrical signal output by the controller, the plurality of light emitting diodes 21 form a predetermined character or image.

As described above, in the electric sign of the present embodiment, the point light source assembly 20 is fitted to the point light source assembly support part 30 so as to allow two degrees of freedom movement, thereby rotating each point light source assembly 20 in a desired direction. It becomes possible to improve visibility. For example, even if the display board is installed at a high place such as a roof of a building, the irradiation direction of the light emitting diodes 21 of each point light source assembly 20 is adjusted downward, so that people who pass near the building can easily be expressed on the display board. You can make text or images visible.

In addition, the point light source assembly 20 may be adjusted to create a special pattern such as a wave pattern, a swirl pattern, and the like. Of course, two degrees of freedom of each point light source assembly may be controlled electronically, and two degrees of freedom of all the point light source assemblies may be electronically controlled.

In addition, when a failure occurs in some of the light emitting diodes of the plurality of light emitting diodes, it is possible to easily replace only the light emitting diodes in question. In other words, in the electric sign of the present embodiment, it is possible to attach and detach the point light source assembly individually to the point light source assembly support, so that there is a problem with some light emitting diodes, so that the problem of having to replace the entire electric sign or module does not occur. When mass-producing a point light source assembly in a single product through injection molding or the like, sufficient economical efficiency is expected in terms of production cost. Therefore, the semi-permanent use of the electric signboard is possible by periodically replacing the point light source assembly.

And, Figure 3b is a perspective view showing a point light source assembly according to another embodiment of the present invention, Figure 3c is a perspective view showing a point light source assembly according to another embodiment of the present invention. For reference, hereinafter, the same components as those described above will be omitted and the same reference numerals will be used.

As shown in FIG. 3B, the connection portion 123 of the LED socket member 122 of the point light source assembly 120 has three different colors, for example, red, green, and blue light emitting diodes 21a, 21ab, 21c) are combined and one point light source assembly 120 constitutes one pixel.

As shown in FIG. 3C, the light emitting portion 21a of the light emitting diode 21 of the point light source assembly 220 is accommodated in the cup-shaped connecting portion 223 of the light emitting diode socket member 222 or more. The cup-shaped connection part 223 may be made of a material that can easily reflect, or a material of a material that is easily reflective may be coated on the inner surface 223a of the cup-shaped connection part 223. Accordingly, it is possible to minimize the loss of light emitted from the light emitting diodes 21, thereby reducing the power consumed by the light emitting diodes. Of course, the light emitting diodes 21 vulnerable to heat may be prevented from being directly exposed to direct sunlight. In addition, there is no restriction | limiting in the form of cup-shaped connection part. For example, based on FIG. 3C, only the upper connection part may protrude in the irradiation direction of the light emitting diode.

Figure 4a is a perspective view showing the appearance of the light-emitting plate according to another embodiment of the present invention, Figure 4b is a perspective view showing a state in which the irradiation direction adjusting plate is coupled in the light-emitting plate of Figure 4a, Figure 4c is the irradiation direction adjusting plate of Figure 4b is moved Is a perspective view showing a coupled state.

As shown in FIGS. 4A to 4C, the electronic display plate of the present embodiment further includes an irradiation direction adjusting plate 50 having a plurality of through holes 51.

The irradiation direction adjusting plate 50 has a point light source assembly support so that the light emitting diodes 21 provided in each of the plurality of point light source assemblies 20 pass through the plurality of through holes 51 formed in the irradiation direction adjusting plate 50. It is installed in the front part of 30. As the irradiation direction control plate 50 is moved in the up, down, left, and right directions, two degrees of freedom operation of the plurality of point light source assemblies 20 are performed, and the light emitting diodes 21 of the plurality of point light source assemblies 20 are formed. The direction of irradiation of the groups is adjusted in groups. In this case, the diameter D2 of the through hole 51 formed in the irradiation direction control plate 50 may be larger than the diameter D1 of the point light source assembly 20 for smooth rotation of the point light source assembly 20. The light emitting plate of this embodiment includes one irradiation direction adjusting plate, but a plurality of irradiation direction adjusting plates are provided, so that the light emitting diodes provided in the light emitting plate can be divided into several groups to adjust the irradiation direction.

The irradiation direction adjustment plate 50 according to the present embodiment includes a plurality of installation holes 52, and the point light source assembly support unit 30 has a plurality of installation holes 52 of the irradiation direction adjustment plate 50 at its front surface. And a plurality of installation groove groups 60 coupled to each other, and each of the plurality of installation groove groups 60 includes a plurality of installation grooves 61. In addition, each of the plurality of installation holes 52 is selectively coupled to one of the plurality of installation grooves 61 of the corresponding installation groove group 60, so that the irradiation direction adjusting plate 50 may have the point light source assembly support 30. It may be coupled to a position moved up, down, left, and right with respect to. For example, FIG. 4B shows the irradiation direction adjusting plate 50 such that the irradiation direction of the light emitting diode 21 of the point light source assembly 20 faces a direction perpendicular to the plane of the point light source assembly support 30. As coupled to the 30, each of the plurality of installation holes 52 of the irradiation direction adjustment plate 50 is the middle of the installation grooves 61 of each of the installation groove groups 60 of the point light source assembly support 30. It is coupled to the installation groove (61a) located in. 4C is a combination of the irradiation direction adjustment plate and the point light source assembly support part 30 such that the irradiation direction of the light emitting diode 21 of the point light source assembly 20 faces the front lower side of the light emitting plate. Each of the two installation holes 52 is coupled to an installation groove 61b positioned below one of the installation grooves 61 of each of the installation groove groups 60 of the point light source assembly support 30. In this way, the irradiation direction of the light emitting diodes 21 of the respective point light source assemblies 20 can be adjusted by moving the relative position of the irradiation direction adjusting plate 50 with respect to the point light source assembly support 30.

FIG. 5A is a perspective view illustrating an electronic display plate according to still another embodiment of the present invention, and FIGS. 5B and 5C are views illustrating an operation of the irradiation direction adjusting plate of the electronic display plate of FIG. 5A.

The electronic display panel of this embodiment includes one or more elastic bodies 71 supporting the irradiation direction adjusting plate 150 in at least one of up, down, left, and right directions, and the irradiation direction adjusting plate 50 against the elastic force of the elastic body 71. It further comprises at least one cam member 72 for moving in at least one direction of the up, down, left, right. Reference numeral 80 denotes a frame for protecting the cam member 72, the elastic body 71 and the like from the outside, and reference numeral 73 denotes an irradiation direction adjusting plate 50 inserted between the frame 80 and the point light source assembly support 80. It represents a spacer that forms a space that can be made.

By this structure, the cam member 72 is rotated by a drive motor (not shown). The irradiation direction adjusting plate 150 moves away from or close to the cam member 72 in proportion to the amount of rotation of the cam member 72. Accordingly, the point light source assemblies 20 are rotated in groups to irradiate light emitted from the light emitting diodes. The direction is adjusted.

The elastic body 71 forms a coil spring, but may be a tension spring, and the number thereof is not limited. In addition, there is no limitation on the number of cam members.

In addition, the cam member 72 is automatically controlled by the controller 50 (see FIG. 2), so that the irradiation direction of the light emitting diode of the point light source assembly 150 can be adjusted in a predetermined pattern. Therefore, the advertising effect by the electronic display board can be further increased.

FIG. 6 is a perspective view illustrating an electronic plate according to another embodiment of the present invention, FIG. 7A is a perspective view illustrating the light emitting diode and the light guide of FIG. 6, and FIG. 7B is a state in which the light emitting diode and the light guide of FIG. 6 are attached to each other. It is a perspective view showing. 8A and 8B are front and side cross-sectional views showing that the irradiation direction of the light emitting diode is adjusted forward and downward in the display panel of FIG. 6.

The plurality of light emitting diodes 21 according to the present exemplary embodiment are directly connected to the circuit board and arranged at regular intervals to blink to form a predetermined character or image.

In addition, the light emitting plate of the present embodiment is a plurality of light guides 90 of the elastic material attached to the front portion of each of the plurality of light emitting diodes 21, and a plurality of light emitting diodes 21, the upper and lower And, the left and right further comprises a irradiation direction adjustment plate 50 for bending the plurality of light guides 90 in a predetermined direction. To this end, the irradiation direction adjusting plate 50 includes a plurality of through holes () formed to penetrate one end of each of the plurality of light guides 90.

As described above, the light guide 90 is made of a transparent and predetermined elastic material, and guides the light incident to one end to the other end. The light guide 90 may be made of one strand of integrated resin, or may be made of a combination of several strands of optical fiber.

The irradiation direction adjusting plate 50 may be moved up, down, left, and right in the same manner as described above. In other words, as shown in Figs. 4a to 4c, it may be coupled by a method such as bolt coupling at different positions, it may be moved by a cam member as shown in Figs. 4a to 4c.

9 is a view showing an electrical connection structure between the fitting point of the point light source assembly and the point light source assembly support according to another embodiment of the present invention.

The input unit 327 of the point light source assembly 320 according to the present embodiment includes a first assembly side terminal 327a and a second assembly side terminal 327b provided at the joint portion 324 of the light emitting diode socket member 322. Equipped. The fitting hole 331 further includes a first fitting hole terminal 331a corresponding to the first assembly side terminal 327a and a second fitting hole terminal 331b corresponding to the second assembly side terminal 327b. Include. While the point light source assembly 320 is fitted into the fitting hole 331 and moves in two degrees of freedom, the first assembly side terminal 327a and the first fitting side terminal 331a are connected to each other and the second assembly is connected. The side terminal 327b and the second fitting hole side terminal 331b are connected to each other.

In addition to the present invention may be variously modified. For example, the electric sign may include a rack gear coupled to one side of the irradiation direction adjusting plate, and a spur gear meshed with the rack gear and driven by a driving motor. The irradiation direction adjusting plate coupled with the rack gear by the rotation of the spur gear is linearly movable in one direction. In addition, it is also possible to move the irradiation direction adjusting plate using a bimetal or the like.

10 Case 20 Point Light Assembly
21 Light emitting diodes 22 Light emitting diode socket members
23 Connections 24 Joints
25 waterproof material 26 conduction plate
27 Input part 30 Point light source assembly support
40 circuit board 50 control unit

Claims (10)

A case in which an opening is formed at one side;
At least one light emitting diode, at least one connection portion to which the at least one light emitting diode is electrically connected, and at least one joint portion formed at a spherical shape on the other side of the connection portion, the light emitting diode socket member made of a resin material, and the power source or the light emitting diode as A plurality of point light source assemblies having an input part provided at one side of the light emitting diode socket member to supply an electrical signal, and arranged at regular intervals so that a predetermined letter or image is expressed according to the blinking of the light emitting diode;
A point light source assembly support part fixed to the case and having a plurality of fitting holes formed therein, wherein each of the plurality of point light source assemblies are fitted so as to allow movement of two degrees of freedom;
A circuit board on which wirings electrically connected to the plurality of point light source assemblies are printed; And,
And a controller configured to control the plurality of light emitting diodes such that each of the light emitting diodes provided in the plurality of point light source assemblies blinks according to an electrical signal.
And an illumination direction of the light emitted from the light emitting diode of the point light source assembly by adjusting two degrees of freedom of the point light source assemblies fitted to the fitting holes of the point light source assembly support. The method of claim 1,
And the connection portion of the light emitting diode socket member is formed in a cup shape, and the connection portion is filled with epoxy or silicon after the light emitting diode is installed in the cup-shaped connection portion. The method of claim 2,
And a light emitting portion of the light emitting diode is accommodated in the cup-shaped connecting portion more than half. The method of claim 1,
The inner surface of the plurality of fitting holes of the point light source assembly is a light-emitting plate, characterized in that the polyurethane-based sealing resin is applied. The method of claim 1,
Further comprising a irradiation direction adjustment plate having a plurality of through holes,
The irradiation direction adjustment plate is provided on the front portion of the point light source assembly support so that the light emitting diodes of each of the plurality of point light source assemblies pass through corresponding ones of the plurality of through holes of the irradiation direction adjustment plate,
And the irradiation direction adjusting plate is moved up, down, left, and right so that the irradiation direction of the light emitting diodes of the plurality of point light source assemblies is adjusted. The method of claim 5,
The irradiation direction adjustment plate is provided with a plurality of installation holes,
The point light source assembly support part includes a plurality of installation groove groups coupled to the plurality of installation holes at a front surface thereof, and each of the plurality of installation groove groups includes a plurality of installation grooves.
Each of the plurality of installation holes is selectively coupled to one of a plurality of installation grooves of a corresponding installation groove group, so that the irradiation direction adjusting plate is coupled to a position moved up, down, left, and right with respect to the point light source assembly support. Display board, characterized in that. The method of claim 5,
At least one elastic body supporting the irradiation direction adjusting plate in at least one of up, down, left and right directions;
And at least one cam member which rotates and moves the irradiation direction adjusting plate in at least one of up, down, left and right directions against the elastic force of the at least one elastic body. The method of claim 7, wherein
And the control unit controls the at least one cam member so that the irradiation direction of the light emitting diodes of the plurality of point light source assemblies is automatically controlled in a predetermined pattern. The method of claim 1,
The input unit of the point light source assembly includes a first assembly side terminal and a second assembly side terminal provided in the joint portion of the socket member,
The fitting hole of the point light source assembly support unit further includes a first fitting hole terminal corresponding to the first assembly side terminal, and a second fitting hole terminal corresponding to the second assembly side terminal,
While the point light source assembly is fitted into the fitting hole of the point light source assembly support part and moves for two degrees of freedom, the first assembly side terminal and the first fitting side terminal remain connected to each other, and the second assembly side terminal and And the second fitting hole side terminals are connected to each other. A case in which an opening is formed at one side;
A circuit board accommodated in and fixed to the case;
A plurality of light emitting diodes electrically connected to the circuit board and arranged and blinking at regular intervals to form a predetermined character or image;
A plurality of optical guides of elastic material attached to front surfaces of each of the plurality of light emitting diodes;
An irradiation direction adjusting plate having a plurality of through-holes through which one end of each of the plurality of light guides penetrates, and moved upward, downward, left and right with respect to the plurality of light emitting diodes; And
And a controller configured to control the plurality of light emitting diodes such that the plurality of light emitting diodes blink according to an electrical signal.
And an irradiation direction of light emitted from the plurality of light emitting diodes is adjusted by moving the irradiation direction adjusting plate up, down, left and right.

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