JPH04136890A - Display device - Google Patents

Abstract

PURPOSE:To improve cooling ability in a display module by ventilation by forming a ventilating hole at the lower part of the front surface of the display module and providing a step part on the upper surface of the display module at a spot corresponding to back of the ventilating hole. CONSTITUTION:As to each module 2, air from an air blowing fan 7 is introduced in a module base 4 through the ventilating hole 4c at the back of the module 2, and it passes toward a driving device 6 and plural display elements 2 which are located forward, so that it cools the device 6. Then, it passes through the ventilating hole of an aggregate socket 5, which is not shown in Figure, to cool the respective elements 2, and is exhausted to the outside air from the ventilating port 8. Since the exhaust air is guided to the inclined surface of the front surface of a trapezoid of the projecting step part 9 and guided forward or toward both right and left sides, ventilating force is improved. As a result, cooling efficiency by the ventilation in the module case 2 is improved. Then, situation that rainwater infiltrates and stagnates behind the step part 9 and corrodes the module case 4 is prevented.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a display device suitable for a large display device installed outdoors such as a driving stadium, and particularly relates to a display module suitable for waterproofing of a display module. The present invention relates to a display device with improved performance.

(Prior Art) Generally, this type of display device configures a display module by incorporating a plurality of display elements such as fluorescent lamps and light emitting diodes for display forming one pixel, and furthermore, a plurality of display modules are arranged on a shelf. They are arranged vertically and horizontally by incorporating them into

By controlling the blinking of each display element, necessary information is displayed using characters, figures, symbols, etc.

Each display module includes display elements arranged in, for example, two rows and eight columns in its module case, and also includes a drive device for driving these display elements, but these display elements and drive device generate heat.

If these temperatures rise above a predetermined temperature, efficiency such as luminous efficiency and lifespan will be reduced, so cooling air is blown into the module case to cool them down.

(Problems to be Solved by the Invention) However, since such display devices are generally installed outdoors, at least a portion of the display module is exposed to wind and rain.

Therefore, regarding the ventilation holes that exhaust the cooling air inside each display module to the outside, rainwater can enter the display module through the ventilation holes without blocking the ventilation inside the module case from being exhausted from the ventilation holes. It is requested to prevent this from happening.

Therefore, the present invention has been made in consideration of such circumstances, and an object thereof is to provide a display device that can improve the waterproofness of a display module.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above problems, the present invention is configured as follows.

In other words, the present invention provides a display device in which a plurality of display modules each having a plurality of heat-generating display elements disposed on the front surface are arranged vertically and horizontally. A ventilation hole is provided in the lower part of the front part of the module to allow gas to flow into the inside of the module through the opening, and to communicate with the above-mentioned ventilation opening surface and to discharge the gas to the outside. It is characterized in that stepped portions are provided at corresponding locations.

(Function) Since the ventilation hole is provided on the lower surface of the front surface of the display module, this ventilation hole opens in the narrow gap between the top and bottom of the display modules that are adjacent to each other in the vertical direction (vertical direction). On the other hand, since it opens downward, it is possible to almost prevent rainwater from entering the display module through this ventilation hole.

Further, a step is provided at the upper part of the front surface of the display module behind the ventilation hole, and this step is located in a narrow gap between the top and bottom of display modules that are adjacent to each other in the vertical direction (vertical direction).

For this reason, even if rainwater or the like enters the gap between the top and bottom of display modules that are vertically adjacent to each other from the front of the display module, this step prevents this rainwater from entering behind it. Since the rainwater is guided to the left and right sides and drained, it is possible to prevent rainwater from entering the display module.

Furthermore, since the ventilation hole of one of the display modules that are vertically adjacent to each other opens in front of the step of the other display module that is adjacent to the display module directly below the display module, the exhaust gas discharged to the outside from this ventilation hole is discharged from the step. will guide you to either side or in front of it. Therefore, the ventilation efficiency within the display module can be increased, and therefore the cooling efficiency of the display element can be increased.

(Example) Examples of the present invention will be described below based on FIGS. 1 to 4.

FIG. 3 is a partially cutaway side view of an embodiment of the present invention, and in the figure, the display device 1 has a plurality of display modules 2, 2, etc. installed outdoors such as an athletic stadium. By incorporating it into the shelf 3 with high density, it is configured as an electric display panel or the like.

The shelf 3 has a plurality of horizontally extending shelf boards 3a arranged vertically in parallel in the figure, and the shelf boards 3a are vertically partitioned by a plurality of partition boards 3b perpendicular to the shelf boards 3a. In this case, a plurality of display modules 2゜2... are arranged so that their front surfaces are flush with each other and their front parts protrude slightly forward,
For example, they are placed in a single horizontal row at high density.

On the other hand, as shown in FIG. 1, the display module 2 has display elements 2a arranged in, for example, 2 rows (stages) and 8 columns, and is housed in the front part of a flat box-shaped module case 4.

The display element 2 is a display fluorescent lamp 2a shown in FIG.
and light emitting diodes, the former type of fluorescent lamps for display 2
For example, a is called a single tube multicolor fluorescent lamp, etc., and is a single tube R(
It is designed to emit light in three colors: red), G (green), and B (blue), and when it emits light, it generates heat and raises its temperature.

The module case 4 is constructed by covering a rectangular flat bottom plate 4a with a U-shaped top cover 4b made of aluminum, for example.
On the front part of a, a collective socket 5 is provided, in which a plurality of sockets for electrical connection are assembled and formed into one body, into which the pins 2aa of each display element 2 can be removably inserted, and at the rear thereof. , a drive device 6 equipped with a power source and a lighting control circuit for lighting each display element 2 or controlling its blinking, and a vent 4c are provided.

The ventilation hole 4c introduces air from the blower fan 7 behind the display module 2 into the module case 4, ventilates the inside thereof, cools the drive device 6 and the plurality of display elements 2, which generate heat, and cools them. This prevents a decrease in efficiency and life due to temperature rise.

A ventilation hole 8 is formed in the front surface of the bottom plate 4a of each module case 4, so that the ventilation introduced through the ventilation hole 4C is discharged to the outside air.

Further, on the upper surface of the upper lid 4b of each module case 4, a trapezoidal convex step 9 tapering upward in the drawing is formed at a location corresponding to the back of the ventilation hole 8, as shown in FIG. It protrudes over the entire length in the width direction, and protrudes upward in the figure behind the ventilation hole 8 in the gap between the display modules 2, 2 adjacent in the vertical direction (vertical direction in Fig. 3). ing.

Next, the operation of this embodiment will be explained.

Each module 2 introduces air from the ventilation fan 7 into the module case 4 through the ventilation hole 4C on the back side,
Furthermore, this air blows toward the front driving device 6 and the plurality of display elements 2 to cool the driving device 6, and also cools and ventilates each display element 2 through the ventilation hole (not shown) of the collective socket 5. It is discharged from the hole 8 to the outside air.

This exhaust air is guided by the trapezoidal front inclined surface of the convex step portion 9 and guided to the front thereof or to both left and right sides thereof, so that the ventilation force is improved. As a result, the cooling efficiency of the air inside the mosiel case 2 can be increased.

On the other hand, during rainy weather, rain as shown by the broken line in FIG. 3 falls on the display module 2, and moreover, this rainwater enters from the front side into the gap between the top and bottom of the display modules 2 that are vertically adjacent to each other. . However, this rainwater is prevented from entering the rear side by the front trapezoidal inclined surface of the convex step part 9, but is guided to both left and right sides thereof and flows down.

Therefore, it is possible to prevent rainwater from entering and staying behind the convex step portion 9 and corroding the module case 4, and also preventing rainwater from entering the module case 4 and causing electrical short-circuits, etc. It is possible to prevent this from happening.

In the above embodiment, the module case 4 has a convex stepped portion 9.
Although a case has been described in which the convex step portion 9 is provided protrudingly, the present invention is not limited to this.
It may be replaced with the concave stepped portion 10 shown in the figure.

The concave stepped portion 10 is located at a location corresponding to the back of the ventilation hole 8.
The upper cover 4b of the module case 4 is formed with a required width on the upper surface and both left and right side surfaces, and the rear sloped surface 10a can prevent rainwater from entering behind it, and has the same effect as in the previous embodiment. It can be effective.

〔Effect of the invention〕

As explained above, in this invention, a ventilation hole is provided at the lower part of the front surface of the display module, and a step is provided on the top surface of the display module at a location corresponding to the back of the ventilation hole. When the outside air is discharged from the ventilation hole, the direction of the discharge can be guided by the step part to the front and to the left and right sides.This makes it possible to increase the ventilation force inside the display module. It is possible to increase the cooling capacity within the display module.

In addition, even if rainwater enters the gap between the top and bottom of display modules that are adjacent to each other in the vertical (vertical) direction from the front side, the stepped portion can prevent rainwater from entering the rear of the display module. It is possible to prevent electrical short-circuits and the like from occurring due to the intrusion into the interior.

[Brief explanation of the drawing]

1 is an external perspective view of the display module shown in FIG. 3, FIG. 2 is an external perspective view of a display fluorescent lamp which is an example of the display element shown in FIG. 1, and FIG. 3 is a display device according to the present invention. FIG. 4 is a partially cutaway side view of an essential part of one embodiment of the present invention, and FIG. 4 is a perspective view of an essential part of another embodiment of the present invention. ]...Display device, 2...Display module, 3...
Shelf, 3a...Shelf board, 4...Module case, 4a
... Bottom plate, 7... Ventilation fan, 8... Ventilation hole, 9
... Convex stepped portion, 10... Concave stepped portion. Applicant's agent Hisashi Hatano\r J

Claims (1)

[Claims] In a display device in which a plurality of display modules each having a plurality of heat-generating display elements disposed on the front surface are arranged in a matrix, the display module has a ventilation opening on its back side, and the inside of the module is supplied through the ventilation opening. A ventilation hole through which gas flows in and communicates with the ventilation opening and discharges the gas to the outside is provided at the lower part of the front surface, while a ventilation hole is provided on the upper surface of the front surface at a location corresponding to the back of the ventilation hole. A display device characterized by providing a stepped portion.