JPH0410076B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a large display device used in back screens of baseball stadiums and the like.

Technical background of the invention and its problems In general, this type of display device uses a large number of display elements such as cathode ray tubes, lamps, and light tubes, so the display unit is constructed by dividing the display elements into multiple pieces. However, these display units are regularly arranged vertically and horizontally on a large display surface.

Here, since each display element and lighting control circuit section generate heat during lighting operation, cooling is required. However, the cooling means is a concentrated air blowing method that utilizes the space inside the display box where all the display units are installed. In this method, the cooling condition is rough, and the cooling condition of each display element varies, so it is difficult to make the brightness of the entire display surface the same, resulting in poor display conditions.

Furthermore, in a display device using a fluorescent tube as a display element, the lighting characteristics deteriorate at low temperatures such as in winter, but no particular countermeasures have been taken for this.

Purpose of the Invention The present invention was made in view of the above points, and it is possible to uniformly cool all display elements to make the brightness of the entire display surface almost uniform, and also to reduce the output light from the display surface. To provide a large-sized display device that does not obstruct the image quality, has no fear of foreign matter entering from the outside, is easy to assemble as a whole, and can conversely warm a display element at low temperatures.

Summary of the Invention By providing a fan for each display unit, the present invention makes it possible to cool the lighting control circuit and display element reliably and uniformly, thereby ensuring a high-quality display condition over the entire display surface. In particular, it prevents the output light from the display surface from being obstructed, prevents the intrusion of foreign matter from the outside, and makes it easy to assemble the whole display element-lighting control circuit. Depending on the arrangement of the fan,
When the temperature is low, by weakening the blowing force of the fan, the display element is warmed by warm air from the lighting control circuit section, making it resistant to low temperatures.

Embodiment of the Invention An embodiment of the present invention will be described based on the drawings.
First, FIGS. 1 and 2 show the overall appearance. A display box 2 is provided on a base 1, and the front surface thereof is a display surface 3. Here, display surface 3
is provided with a display board 5 having a large number of holes 4, and a display element 6 protrudes from each hole 4. These display elements 6 are plural, for example, 4×8.
Each =32 display units 7 are designated as display units 7, and these display units 7 are regularly arranged vertically and horizontally on the display surface 3.

3 to 5 show one display unit 7. FIG. Basically, a plurality of display elements 6 are provided in the front stage, a lighting control circuit section 8 such as an inverter for these display elements 6 is provided in the center, and a fan 9 is provided in the rear stage. First, the display element 6 has a fluorescent tube in a holder 10, a colored filter glass 11 protruding from the hole 4 at the tip, the central part is shielded by a rubber 12, and the display element 6 is attached to a mounting part 13 to form a lighting control circuit. Electrical connection is made with the 8 side. Here, the holder 10 has a ventilation section, and an exhaust hole 14 that serves as an exhaust section is formed at the tip (this exhaust hole 14 faces downward, but for convenience in FIG. 3, it is shown on the side surface). show). Further, power is supplied to the lighting control circuit section 8 based on the power supply connector 15, and control is performed by signals from the side of the connector 17 connected to the connector 16. A fan 9 provided on the back side blows air toward the lighting control circuit section 8 and the ventilation section of the display element 6.

Note that 18 is a handle for gripping the display unit 7. Further, in FIG. 1, 19 is a temperature sensor.

In such a configuration, under the control of the lighting control circuit section 8, the fan 9 is also driven when the display element 6 performs lighting display. The cooling air from this fan 9 passes through the lighting control circuit section 8 and the ventilation section in the holder 10 as shown by the arrow in FIG.
The lighting control circuit section 8
Thus, each display element 6 is cooled well.
Since such a cooling operation is performed for all display units 7, the cooling state of all display elements 6 is almost uniform, so that the brightness is uniform across the entire display surface 3, and a high-quality display state is achieved. You will get it.

Incidentally, the power of the fan 9 can be changed by a control circuit (not shown), and is weakened during low temperatures such as in winter. That is, the temperature sensor 19
When it is detected that the outside air temperature is low, all the fans 9 are uniformly controlled by the control circuit to send a breeze. As a result, air is blown in the same way as during cooling described above, but since it is a light breeze,
The air warmed by the lighting control circuit section 8 is sent to the display element 6 side, thereby warming the ambient temperature of each display element 6. In this way, the display element 6 is warmed at low temperatures, making it resistant to low temperatures and ensuring a good lighting condition. This is particularly effective when a fluorescent tube is used as in this embodiment.

Effects of the Invention According to the present invention, as described above, a fan is provided for each display unit and arranged in the order of display element - lighting control circuit section - fan, so that all display elements can be cooled almost uniformly and with high reliability. It is possible to ensure a high-quality display with uniform brightness across the entire display surface, and it also prevents the output light from the display surface from being obstructed and prevents foreign matter from entering from the outside. In addition, since a flow path is formed simply by attaching the display element itself to the mounting part, the entire assembly can be easily assembled.Furthermore, it can be heated by blowing air from a fan at low temperatures, making it resistant to low temperatures. It is something that can be made strong.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a front view of the entire unit, FIG. 2 is a side view thereof, FIG. 3 is a side view of the display unit, FIG. 4 is a front view thereof, and FIG. The figure is a rear view. 6... Display element, 7... Display unit, 8... Lighting control circuit section, 9... Fan.

Claims (1)

[Claims] 1. Has a display section at the tip that blocks fluid flow;
A plurality of display elements that electrically emit light; A mounting part is formed on the front surface to which each of the display elements is attached to a position where each of the display parts forms a planar shape, and each display element is connected to the inside through each of the above-mentioned mounting parts. and a display unit having a lighting control circuit section for transmitting electrical signals; and the display unit has a fan on the back, and the fan draws fluid into the display unit and connects the mounting section to the display unit. forms the fluid so that it can flow,
The display element has a ventilation section formed inside thereof, and the fluid taken into the display unit by the fan is directed to the lighting control circuit section, the mounting section, and the ventilation section at a side part avoiding the display section. A large display device characterized by having an exhaust section that discharges air through the air.