JPH075505Y2 - Outdoor LED display - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a dot matrix type LE used outdoors.
The present invention relates to the improvement of the D display device.

[Conventional technology]

FIG. 6 shows a sectional structure of an outdoor LED display device, and FIG. 7 shows a partial front structure thereof. In the figure, 11
Is an LED lamp, 12 is a dot plate, and 13 is a display unit.

A large number of LED lamps 11 are provided on the front surface (sixth
They are arranged in a matrix on the surface facing left in the figure). The dot plate 12 has a large number of apertures 12a at positions corresponding to the arrangement positions of the large number of LED lamps 11, and with the dot plate 12 arranged on the front surface of the display unit 13, the LED lamps 11 are individually arranged. Fit into the opening 12a.

The dot plate 12 is provided for the purpose of improving the contrast between the brightness of the LED lamp 11 and the surrounding brightness. Individual
Since the LED lamp 11 is arranged deep inside the opening 12a of the dot plate 12, the dot plate 12 is
Will play the role of food. That is,
Prevent the sunlight from directly hitting the LED lamp 11 so that the display of the display due to the diffused reflection of the sunlight on the lens top of the LED lamp 11 will be hard to see. The dot plate 12 is subjected to a black matte surface treatment in order to prevent reflection of sunlight.

[Problems to be solved by the device]

In this outdoor LED display device, water droplets adhere to the dot plate 12 due to rainfall, and further water droplets penetrate into the inside of the openings 12a. Then, water drops adhere to the lens portion of the LED lamp 11.

FIG. 8 shows the emission direction of the light emission of the LED lamp 11 when there is no water droplet inside the opening 12a of the dot plate 12, and the light emission of the LED lamp 11 is normally emitted forward. However, if water drops adhere inside the apertures 12a of the dot plate 12, as shown in FIG. 9, light is refracted on the surface of the water drops 14 between the lens portion 11a of the LED lamp 11 and the apertures 12a, Since the amount of light emitted from the LED lamp 11 to the outside is reduced, the light emitted from the LED lamp 11 becomes almost invisible.

As a solution to this problem, conventionally, in order to prevent water droplets from adhering to the LED lamp, a method of enlarging the aperture of the dot plate or applying a water repellent to the dot plate has been taken. It was However,
Increasing the size of the aperture of the dot plate reduces the sunlight shielding efficiency, and in the method of applying water repellent,
Since the water repellent coating film disappears in a short period of time, there is a drawback that it is necessary to apply the water repellent regularly.

The present invention has been made in view of the above circumstances, and its purpose is to provide good light-shielding efficiency of sunlight and to prevent an LED from raining.
An object of the present invention is to provide an outdoor LED display device in which the light emission of the lamp is good.

[Means for Solving the Problems]

To explain the configuration for achieving the above object, the outdoor LED display device of the present invention is a packing in which a large number of LED lamps are arranged in a matrix on the front surface of the unit case, and the front surface of the unit case is made of an elastic material. Is waterproof by
And on the front surface of the LED lamp, a dot plate having a large number of openings in a matrix at positions corresponding to the positions where the LED lamps are arranged, is arranged so that the LED lamps fit into the respective openings. In the LED display device, the dot plate has a groove that connects the openings in the up-down direction on the back surface side, and the openings are aligned in the up-down direction with the openings and the LED lamps fitted together. The holes communicate with each other through this groove, and in the packing, a large number of cylindrical parts are integrated in a matrix at a position corresponding to the position where the LED lamps are arranged so that the opening faces the front. It is characterized by being formed.

[Action]

On the back side of the dot plate, a groove that connects the holes in the vertical direction is formed, and the holes arranged in the vertical direction when the dot plate hole and the LED lamp are fitted to each other communicate with each other by this groove. ing. In such a configuration,
When water droplets enter the openings of the dot plate during rainfall, the water droplets sequentially flow through the groove, the openings located below the opening, and the groove, and flow downward to be discharged to the outside. Therefore, water droplets do not stay in the holes, so even when it rains
The D lamp emits light well. In addition, the cylindrical part of the packing formed on the front surface of the unit case fits the LED lamp to cover the LED lamp to the root and adhere closely.
Since the adhesion can be secured against the displacement and inclination of the lamp, the inside of the LED display device can be reliably waterproofed. Furthermore, since the opening and the LED lamp are fitted to each other, it is possible to surely shield the sunlight.

〔Example〕

FIG. 1 shows the cross-sectional structure of the outdoor LED display device of this embodiment. In the figure, 1 is an LED lamp, 2 is a dot plate, 3 is a printed circuit board, 4 is a rubber packing, and 5 is a rubber packing.
Is a unit case.

A large number of LED lamps 1 are arranged in a matrix. A plurality of LED lamps 1 are mounted on the printed circuit board 3 for each column of this matrix, and the plurality of printed circuit boards 3 are arranged side by side inside the unit case 5, whereby the matrix arrangement of the LED lamps 1 is achieved. Has been done. The front surface of the unit case 5 is waterproofed by the rubber packing 4. A large number of rubber packings 4 are integrally formed in a matrix on a front surface of the rubber packing so that the cylindrical portion has a position corresponding to the mounting position of the LED lamp 1 so that the opening faces the front surface. 1 is covered to the root. The rubber packing 4 maintains the waterproofness of the portion behind the LED lamp 1 (rightward in the figure).

The dot plate 2 is arranged in front of the LED matrix. This dot plate 2 has a large number of apertures 2a corresponding to the arrangement positions of the LED lamps 1 of the LED matrix.
Is formed, and the lens portion 1a of the LED lamp 1 is fitted into each of the openings 2a. FIG. 2 shows the shape of the surface of the dot plate 2, in which the openings 2a are arranged in a matrix.

The dot plate 2 has a groove 2b formed on the back surface on the side where the LED lamp 1 is fitted. FIG. 3 shows the shape of the back surface of the dot plate 2, and the grooves 2b are formed so as to connect the openings 2a arranged in a matrix in each column direction, that is, in the vertical direction. Groove 2b at the bottom of the dot plate 2
Has a downward opening.

The groove 2b of the dot plate 2 is the lens portion 1 of the LED lamp 1.
When a is fitted in the opening 2a, a space is formed which connects the openings 2a and communicates with each other in the vertical direction. Therefore, the fourth
As shown in the figure, the water droplets that have entered the opening 2a of the dot plate 2 flow from the path shown by the broken line, that is, from the opening 2a through the groove 2b and downward from the opening 2c (Fig. 3) at the lower end of the dot plate 2. Fall to. As a result, water droplets do not stay inside the openings 2a of the dot plate 2 during rainfall.

The groove 2b can have various shapes. Figure 5 shows groove 2b
The shape is shown in FIG. 4A, the square groove is the same as that in the above embodiment, the triangular groove is shown in FIG. Further, in order to prevent the light emission of the LED lamp from leaking to other openings due to the groove, the groove can be formed in an S shape or a "V" shape in the vertical direction. In this case, the light emission of the LED is blocked in the middle of the groove and does not reach other openings. In the above embodiment, since the light distribution angle of the LED lamp is within ± 10 ° vertically and horizontally, light leakage through the groove is small, and a simple square groove is sufficient.

[Effect of device]

As is clear from the above description, in the outdoor LED display device of the present invention, the water droplets that have entered the apertures of the dot plate during rain are sequentially transmitted through the grooves and the apertures and discharged downward. Therefore, since water droplets do not stay in the openings, the LED lamp emits light well even during rainfall. In addition, the cylindrical part of the packing fits the LED lamp to cover the LED lamp up to the base and adhere closely to the LED lamp.
The inside of the display device can be reliably waterproofed. Furthermore, since the packing is integrally formed, it is easy to install and remove, and maintenance work is facilitated. Furthermore, since the opening and the LED lamp are fitted to each other, it is possible to surely shield the sunlight.

[Brief description of drawings]

 FIG. 1 is a diagram showing a sectional structure of an embodiment of the present invention, FIG. 2 is a diagram showing a front structure of an embodiment of the present invention, FIG. 3 is a diagram showing a back structure of the embodiment of the present invention, and FIG. FIG. 5 is a view for explaining the operation of the invention embodiment, FIG. 5 is a view showing a groove shape of the invention embodiment, FIG. 6 is a view showing a sectional structure of a conventional example, and FIG. 7 is a front structure of the conventional example. FIG. 8, FIG. 8 and FIG. 9 are views for explaining the operation of the conventional example. 1 ... LED lamp 2 ... Dot plate 2a ... Open hole 2b ... Groove

Claims (1)

[Scope of utility model registration request] 1. A large number of LED lamps are arranged in a matrix on the front surface of a unit case, the front surface of the unit case is waterproofed by a packing made of an elastic material, and the LE is mounted.
An LED display for outdoor use, in which a dot plate having a large number of openings in a matrix at the positions corresponding to the positions of the LED lamps is arranged on the front surface of the D lamp so that the LED lamps fit into each opening. In the device, the dot plate has a groove on the back surface side that connects the openings in the vertical direction, and the openings aligned in the vertical direction with the openings and the LED lamps fitted to each other. The packing communicates with each other, and the packing has a large number of cylindrical parts integrally formed in a matrix at the position corresponding to the position where the LED lamps are arranged so that the opening faces the front. LED display device for outdoor use.