JPH08194437A - Display device - Google Patents

Abstract

PURPOSE: To provide a display device in which a warm-up time can be shortened. CONSTITUTION: A display device is provided with a display portion 2 formed by containing and arranging a plurality of fluorescent tube type luminous elements in matrix-like in a display device box body 1. A transparent plate 3 is arranged in front of the display portion 2 so as to cover the front of the display portion 2. Air is introduced from the outside of the display device box body 1 and is exhausted from the front face of the display portion 2 passing through the display portion 2 so that the whole display device is cooled down. A circulation fan 4 is provided so that the warm air between the display portion 2 front face and the transparent plate 3 is introduced to the backside of the display portion 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device which is arranged on a roof or a wall of a stadium or a building to display information by characters and images.

[0002]

2. Description of the Related Art Conventionally, a display device of this type is disclosed in Japanese Patent Laid-Open No.
There is one as shown in Japanese Patent No. 56986. As shown in FIG. 4 and FIG. 7, in this display, a large display surface is formed by arranging a large number of multicolor light emitting display bodies 8 having a square display surface in a matrix to form a large display surface. The display element drive circuit housed in the display controls the color and amount of light emitted from each display body 8, displaying still images such as advertisement images and computer graphic images, displaying telops such as electronic news, and recording images on videotapes. It is designed to display a video like.

By the way, such a display device is often installed outdoors, and uses a high-brightness display element so as to display a high-contrast image even when the surroundings are bright. The power consumption of the circuit increases and heat generation becomes a problem. Therefore, normally, as shown in FIG. 5, a blower fan 30 is provided at the rear portion of the display device box 1 to introduce the outside air to cool the entire display device. In addition, for cooling the display unit 20, FIG.
As shown in FIG. 5, a unit fan 31 is provided behind the display unit 20, and a minute gap 16 for exhaust is provided between the display elements arranged in a matrix, so that the display element and the drive can be effectively driven. The circuit can be cooled.

[0004]

The fluorescent tube type display element used in this type of display device has temperature characteristics, and the emission brightness of the element is determined by the temperature of the coldest point of the element. As shown in FIGS. 2, 6 and 7, the display body 8 has four independent square light emitting portions, and the display surface 8
An element body 9 composed of a fluorescent lamp capable of emitting multicolor light, in which a, R, G, and B filters are covered, and a cylindrical lamp holder 10 provided so as to surround a filament portion of the element body 9.
And an electrode pin 1 to which the electrode lead wire 11 of the display element is connected at the periphery of the rear opening of the lamp holder 10.
2 is projected to form a base portion. Further, the rear opening of the lamp holder 10 is an intake port 13, and an exhaust port 14 is provided on the lower front surface of the peripheral surface of the lamp holder 10 so as to provide a space between the lamp holder 10 and the element body 9. Ventilation passage 15
Are formed. Therefore, the temperature of the display body 8 is controlled by flowing the air blown by the blower fan 30 and the unit fan 31 through the ventilation paths of the respective display bodies 8 and the minute gaps 16 between the display bodies 8. Because of such a cooling method, the coldest point of the display body 8 is usually the glass bulb portion 32 shown in FIG. 2, and the temperature of the glass bulb portion 32 depends on the ambient temperature behind the display unit 20. It depends.

FIG. 3 shows a graph of the temperature characteristic of the display body 8. As can be seen from this graph, the display 8 can obtain the maximum light emission brightness when the rear temperature of the display unit 20 is around 40 ° C., and the rear temperature is required around 30 ° C. to obtain the luminous efficiency of 90%. Therefore, when the ambient temperature is low, such as in winter, the display unit 20 in the display device box 1 is
There is a problem in that the temperature of the rear part of the device reaches 30 ° C. and warm-up is required for some time until the brightness of the display body 8 stabilizes, and it takes time to operate.

An object of the present invention is to solve the above problems and to provide a display device capable of shortening the warm-up time.

[0007]

In order to achieve the above object, in the invention of claim 1, a display in which a plurality of fluorescent tube type light emitting elements housed and arranged in a display device box 1 are arranged in a matrix form. A transparent plate 3 disposed in front of the display unit 2 so as to cover the front of the display unit 2 and introducing air from the outside of the display device box 1 and passing through the display unit 2; In a display device in which the entire display device is cooled by exhausting air from the front surface of the display unit, a circulation fan 4 for introducing warm air between the front surface of the display unit 2 and the transparent plate 3 to the rear of the display unit 2.
It is characterized by having.

According to a second aspect of the present invention, an openable and closable shutter 6 is provided in an opening portion 5 provided in the display device box body 1 so as to communicate with the inside and outside of the first aspect, and a fan device 7 is provided in the vicinity of the shutter 6. The shutter 6 is provided while the fan device 7 is stopped during the warm-up to close the display device box 1 and the outside air during the warm-up, and the shutter 6 is closed while the warm-up is completed and the fan device 7 is rotating. The fan device 7 and the shutter 6 are interlocked so as to be opened.

[0009]

According to the first aspect of the invention, the warm air between the front surface of the display unit 2 and the transparent plate 3 is introduced to the rear of the display unit 2 by the circulation fan 4, so that the warm air when the display unit 2 is started up by the warm air. The up time can be shortened. Claim 2
According to the invention, when the warm-up is performed by the opening / closing operation of the shutter 6, the outside air outside the display device casing 1 and the inside of the display device casing 1 are shut off, and the outside cool air is prevented from entering the inside of the display device casing 1. In addition, it is possible to prevent the warm air in the display device box 1 from flowing out to the outside, and it is possible to shorten the warm-up time by efficiently utilizing the heat generated from the display unit 2. Further, the fan device 7 allows the cool air outside the display device housing 1 to flow into the display device housing 1 and the warm air in the display device housing 1 to the display device housing 1.
The display unit 2 can be cooled by discharging it to the outside.

[0010]

The present invention will be described below in detail based on the illustrated embodiments. The display device according to the present invention is mainly configured by accommodating and arranging a plurality of display bodies 8 adjacent to each other in a display device box body 1 in which a ventilation path is formed. As shown in FIGS. 2 and 6, the display body 8 has four independent square light emitting portions, and the display surface 8a is covered with R, G, and B filters to emit multicolor fluorescent light. An element main body 9 made of a lamp and a cylindrical lamp holder 10 provided so as to surround a filament portion of the element main body 9, and an electrode lead of the display body 8 is drawn out at the periphery of the rear opening of the lamp holder 10. Electrode pins 12 to which the wires 11 are connected are provided in a protruding manner to form a cap portion. The rear opening of the lamp holder 10 is the intake port 1
3, an exhaust port 14 is provided on the front lower surface of the peripheral surface of the lamp holder 10, and a ventilation path 15 is formed between the lamp holder 10 and the element body 9. This display 8
7 are installed adjacent to each other as shown in FIG. 7, and a minute gap 16 is provided between adjacent display bodies 8. Then, the temperature of the display body 8 is controlled by flowing the air blown by the fan device 7 and the circulation fan 4 described later through the ventilation passages 15 of the respective display bodies 8 and the minute gaps 16 between the display bodies 8. There is.

A display device box 1 in which a display body 8 is housed and arranged.
As shown in FIG. 1, an opening portion 5 is provided in the upper and lower portions, and a shutter 6 that can be opened and closed is installed in the opening portion 5. A fan device 7 is installed inside the shutter 6. The display body 8 is installed at a substantially central portion of the display device box 1 so as to partition the display device box 1 into front and back, and a transparent plate 3 made of tempered glass or the like is installed in front of the display body 8. A first ventilation space 17 is formed between the transparent plate 3 and the display surface 8a on the front surface of the display body 8. A second ventilation space 18 is formed between the back of the display body 8 and the rear part of the display device box 1. A circulation fan 4 is installed in an upper portion of the display device box 1 so as to be located above the display body 8, and a first ventilation space 17 and a second ventilation space 18 are provided via the circulation fan 4. It is in communication. A ventilation duct 19 is attached to the lower part of the second ventilation space 18 from the circulation fan 4. A temperature sensor is installed in the display device housing 1, and the rotation speed of the fan device 7 is controlled by an inverter or the like according to the temperature in the display device housing 1 to adjust the amount of outside air introduced. .
Further, the shutter 6 and the circulation fan 4 are the fan device 7
The shutter 6 is closed when the fan device 7 is stopped at a low temperature or during warm-up to shut off the display device box 1 from the outside air to prevent outside cold air from entering and the display device. The warm air inside the box 1 is prevented from flowing out. At this time, the circulation fan 4 is rotating, and the warm air between the display body unit 20 including the plurality of display bodies 8 and the transparent plate 3 is introduced to the rear of the display unit 20. The blower duct 19 is attached so as to blow air downward, and has a function of agitating the warm air on the front surface of the display unit 20 and the warm air collected on the upper rear part of the display unit 20.

When the temperature is low or the warm-up is performed, the shutter 6 is closed and the fan unit 7 is stopped, and only the circulation fan 4 is operated. As described above, the air circulates between the first ventilation space 17 and the second ventilation space 18 in the display device box 1 and is present between the display body 8 and the transparent plate 3 by the operation of the display body 8. The warm air in the first ventilation space 17 that circulates can be circulated to quickly warm up the display body 8, and the warm-up time until the brightness of the display body 8 stabilizes can be shortened. The time required for normal operation can be greatly reduced. Further, when the temperature of the display body 8 rises more than necessary, the display body is cooled. To cool the display body 8, the shutter device is opened and the fan device installed inside each shutter 6 is used. 7, air outside the display device box 1 is introduced into the second ventilation space 18 from the lower part of the display device box 1 as indicated by a broken arrow B in FIG. Air is caused to flow toward the first ventilation space 17 through the minute gaps 16 between the respective display bodies 8 to cool the respective display bodies 8, and the display device box body is provided via the fan device 7 above the first ventilation space 17. The display body 8 is cooled by discharging air to the outside.

[0013]

According to the first aspect of the present invention, there is provided a display section in which a plurality of fluorescent tube type light emitting elements housed and arranged in a display device box are arranged in a matrix, and the display section is provided so as to cover the front of the display section. In a display device that includes a transparent plate disposed in front of the display device and cools the entire display device by introducing air from the outside of the display device box and exhausting air from the front of the display unit through the display unit. Since a circulation fan that introduces warm air between the front surface and the transparent plate to the rear of the display unit is provided, it is displayed by warm air by introducing the warm air between the front surface of the display unit and the transparent plate to the rear of the display unit by the circulation fan. It is possible to shorten the warm-up time when starting up the section.

According to a second aspect of the present invention, an openable and closable shutter is provided at an opening portion provided in the display device box so as to communicate with the inside and the outside of the first aspect, and a fan device is provided near the shutter to warm up. To shut off the display device box from the outside air, close the shutter while the fan device is stopped during warm-up, and open the shutter while the fan device is rotating after warm-up is complete. Since they are interlocked with each other, in addition to the effect of claim 1, when the warm-up operation is performed by opening and closing the shutter, the outside air outside the display device box and the inside of the display device box are shut off, and the outside cool air enters the display device box. It is also possible to prevent the warm air inside the display device box from flowing out to the outside, and to efficiently dissipate the heat generated from the display unit. In which it is possible to shorten the warm-up time by use. Further, the cooling air outside the display device box is made to flow into the display device housing by the fan device, and the warm air inside the display device housing is discharged to the outside of the display device housing to cool the display portion. .

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing an internal configuration of a display body.

FIG. 3 is a graph showing changes in temperature and light emission luminance.

FIG. 4 is a schematic configuration diagram showing a conventional example.

FIG. 5 is a schematic cross-sectional view showing an internal configuration of the above.

FIG. 6 is a perspective view showing a display body.

FIG. 7 is an explanatory diagram illustrating a display unit.

[Explanation of symbols]

 1 Display Box 2 Display 3 Transparent Plate 4 Circulation Fan 5 Opening 6 Shutter 7 Fan Device

Claims (2)

[Claims] 1. A display unit comprising a plurality of fluorescent tube type light-emitting elements housed in a display device box arranged in a matrix, the transparent unit being arranged in front of the display unit so as to cover the front of the display unit. In a display device that has a plate and cools the entire display device by introducing air from the outside of the display device box and exhausting air from the front of the display unit through the display unit, warm air between the front face of the display unit and the transparent plate. A display device, comprising: a circulation fan for introducing a rear part of the display part. 2. A shutter that can be opened and closed is provided at an opening provided in the display device box so as to communicate with the inside and outside, and a fan device is provided near the shutter, and the display device box and the outside air are shut off during warm-up. In order to achieve this, the shutter is closed while the fan device is stopped during warm-up, and the fan device and the shutter are interlocked so that the shutter is opened while the fan device is rotating after the warm-up is completed. The display device according to claim 1.