JPH0544863Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a large-sized image display device that displays images using a large number of display lamps arranged in a matrix.

[Prior Art] Conventionally, as shown in FIGS. 11 and 12, this type of large-sized image display device includes a multicolor display lamp 1 whose display surface 1a is square, and a display lamp 1 of a housing 2. A large number of display lamps are arranged in a matrix on the front surface to form a large display surface, and the color and amount of light emitted from each indicator lamp 1 is controlled by an indicator lamp drive circuit (not shown) housed in the housing 2. ,
Still images such as advertising images and computer graphics images are now displayed, as well as captions such as lightning news. Note that it is also possible to display a video recorded on a videotape or a moving image such as a video shot with a television camera.

Incidentally, such large image display devices are often installed outdoors, and use high-intensity display lamps 1 to display high-contrast images even in bright surroundings. The power consumption of the lamp drive circuit increases and heat generation becomes a problem. Therefore, a ventilation fan is provided at the rear of the housing 2, and heat is radiated from the display lamp 1 and the display lamp drive circuit by the ventilation fan.In order to efficiently radiate heat from the display lamp 1, a matrix-shaped A minute gap 5 for exhaust is provided between each display lamp 1 arranged in a row. Therefore, the indicator lamps 1 arranged in a matrix on the front surface of the housing 2 had to be installed in consideration of a watertight structure against rainwater that blows into minute gaps. As shown in FIG. 12, the conventional mounting structure for the indicator lamp 1 is that the indicator lamp 1 is inserted into a lamp hole 31 of a support 30 provided on the front surface of the housing 2 via a waterproof gasket 32, and an indicator lamp drive circuit is mounted. A waterproof gasket 32 inserted into the lamp hole 31 is designed to be attached to a lamp socket 34 provided on a printed circuit board 33.
A watertight structure between the indicator lamp 1 and the indicator lamp 1 was realized by this. Note that the minute gap 5 and the inside of the housing 2 are communicated with each other by a ventilation passage within the indicator lamp 1, which has an air inlet opening at the rear of the indicator lamp 1 and an exhaust outlet opening at the lower front surface of the indicator lamp 1.

[Problem to be solved by the invention] However, in the above-mentioned conventional example, it is necessary to provide the waterproof packing 32 in order to realize a watertight structure that prevents rainwater from entering the housing 1, and the number of parts is reduced. As the number of components increased, the configuration became complicated and assembly became troublesome.
Furthermore, since the waterproof gasket 32 is made of an elastic material, when the indicator lamp 1 is attached to the lamp socket 34 of the printed circuit board 33, the indicator lamp 1
The display lamp 1 is likely to be installed at an angle, and the pitch of the display lamp 1 in the vertical and horizontal directions varies, and the state of attachment to the lamp socket 34 also varies, making it troublesome to position the display lamp 1 in the front-rear direction (positioning the display surface flush with the display surface). There was a problem.

The present invention has been made in view of the above points, and its purpose is to provide a large-sized image display device that can realize a watertight structure with a simple configuration.

[Means for Solving the Problems] The large-sized image display device of the present invention has a large number of display lamps arranged in a matrix on the front surface of a housing with small gaps between them, and a display lamp drive circuit housed in the housing. In a large image display device that displays an image by controlling the light emission of each display lamp, a display module that integrates a plurality of display lamps is arranged in a row on the front of a housing, and a module case of the display module is installed. At the same time, a plurality of lamp holes into which the indicator lamps are fitted are formed at the front joint of the split case so as to span both the split cases, and the lamp holes are formed on the circumferential surface of the display lamp holder. A fitting groove is formed in which the peripheral edge is fitted, and a convex rib is formed on one of the joining surfaces of the split case front plate.
A groove is provided on the other side for uneven engagement.

[Function] The present invention is constructed as described above, in which the module case of the display module that integrates a plurality of display lamps is divided into parts, and the lamp hole into which the display lamp is fitted is formed in the front plate of the divided case. The periphery of both lamp holes is fitted into the fitting groove formed on the peripheral surface of the indicator lamp holder, making it watertight without using waterproof packing. The structure has been simplified, and assembly has become easier. Also,
Since the uneven engagement portion is provided on the joint surface of the front plate of the divided case, a more reliable waterproof function can be obtained. In addition, the uneven fitting between the fitting groove and the periphery of the lamp hole makes it possible to accurately and easily position the indicator lamp in the vertical, horizontal, and front-rear directions, thereby simplifying the positioning work of the indicator lamp. It's getting old.

[Embodiment] FIGS. 1 to 10 show an embodiment of the present invention, and the indicator lamps 1 arranged in a matrix on the front surface of the housing 2 are arranged as shown in FIGS. 9 and 10. , a lamp body 10 consisting of a fluorescent lamp capable of emitting multicolor light, which has four independent square light emitting parts and whose display surface is covered with R, G, and B filters.
and a cylindrical lamp holder 11 provided so as to surround the base (filament part) of the lamp body 10, and the electrode lead line 15a of the indicator lamp 1 is formed at the periphery of the rear opening of the lamp holder 11. An electrode pin 15 to be connected is provided in a protruding manner to form a base portion. Further, the rear opening of the lamp holder 11 serves as an intake port 12 , and the exhaust port 13 is provided on the front lower surface of the circumferential surface of the lamp holder 10 , and an exhaust port 13 is provided between the lamp holder 11 and the lamp body 10 . A ventilation passage 14 is formed. Therefore, by blowing air from the ventilation fan through the ventilation path 14 of each display lamp 1 and the minute gap 5 between the display lamps 1, the heat dissipation of each display lamp 1 is made uniform, and the display lamp 1 due to temperature changes is made uniform. It is now possible to display high-quality color images by preventing variations in luminous efficiency.

In addition, in the embodiment, a shade 7 that prevents sunlight from being reflected on the display surface 1a is attached to each display lamp 1, and the base of the shade 7 is provided with a small amount of light in the vertical direction between the display lamps 1. A waterproof plate part 8 is provided which is inserted into the gap 5 and faces the exhaust port 13 at an appropriate distance. Rainwater is prevented from entering through the minute gap 5 and the exhaust port 13 formed on the front lower surface of the indicator lamp 1. Note that this shade 7 is made by punching out a thin stainless steel plate into a predetermined shape, and inserts the upper light shielding part 7a.
At the same time, the lower light-shielding part 7b is cut and raised and painted black.

Furthermore, in the present invention, the above-mentioned indicator lamps 1 are arranged in 16 (8
×2 pieces) are integrated to form the display module 3,
Furthermore, as shown in FIG. 8, eight (2 x 4) display modules 3 are integrated into a display unit 4.
A plurality of display units 4 are formed in the housing 2.
They are arranged in a matrix on the front surface of the screen to display a large-sized image with a predetermined number of pixels. A blower fan 42 is provided at the rear of the display unit 4 for forced air cooling of the display lamp 1 and the display lamp drive circuit. In the display module 3 shown in FIGS. 1 to 7, the display lamp 1 is attached to a lamp hole 23 formed on the front surface of a module case 20, and the electrode pin 15 of the display lamp 1 is inserted into the module case 20. is formed by arranging a power supply printed circuit board 21 that is directly attached (soldered) to the power supply printed circuit board 21, and a driving printed circuit board (not shown) on which a display lamp drive circuit is mounted is connected to the power supply printed circuit board 21. A connector 28 is formed, and a ventilation hole 29 corresponding to the intake port 12 of the indicator lamp 1 is formed.

In addition, module case 2 of display module 3
0 is divided vertically into 3 parts, with the front section divided into 3 parts and the rear section divided into 2 parts, with the central case body 2
An upper cover 20b and a lower cover 20 are placed above and below 0a.
The lamp hole 23, which is formed by attaching c and is formed on the front surface of the module case 20, is connected to the case main body 20a, which is a split case, and the upper and lower covers 20b20.
A plurality of pieces (eight pieces each) are provided so as to straddle the joints of c. Further, a fitting groove 24 into which the periphery of the lamp hole 23 is fitted is formed on the circumferential surface of the cylindrical portion of the lamp holder 11 of the indicator lamp 1. By fitting into the matching groove 24, a watertight structure can be realized with a simple configuration, and the indicator lamp 1 can be accurately positioned in the vertical and horizontal directions and the front-back direction. A waterproof wall 25 parallel to the front plate 22 is provided inside the module case 20, and the periphery of a lamp hole 26, which is bored across the joint of the waterproof wall 25, is used to hold the lamp. It is fitted into a second fitting groove 27 formed on the circumferential surface of the cylindrical portion of the body 11 to form a second watertight structure, thereby providing a more reliable waterproof function. Further, a front plate 22 is provided on the bottom plate of the lower cover 20c.
A drainage hole 35 for draining rainwater that has entered is formed between the wall and the waterproof wall 25, so that the double watertight structure will not be damaged due to the accumulation of rainwater that has entered. Furthermore, case body 2
Front plate 2 of 0a and upper and lower cases 20b and 20c
Convex rib 36 on one side of the joint surface of 2, concave groove 36 on the other side
Since the grooves a are provided and engaged with the concave and convex portions, a more reliable waterproof function can be obtained.

[Effects of the invention] As described above, the present invention has a large number of indicator lamps arranged in a matrix on the front of the housing with small gaps between them, and the indicator lamp drive circuit housed in the housing controls the light emission of each indicator lamp. In a large-sized image display device that displays an image by controlling the A plurality of lamp holes into which indicator lamps are fitted are formed at the front joints of the split cases so as to straddle both the split cases, and the peripheral edges of the lamp holes are fitted into the peripheral surface of the indicator lamp holder. A fitting groove is formed, and a convex rib is provided on one side of the joint surface of the split case front plate, and a concave groove is provided on the other side for concave-convex engagement.A watertight structure can be realized without using waterproof packing, and the structure is simple. It has the effect of being simple and easy to assemble, and also has a convex rib on one side of the joint surface of the split case front plate and a concave groove on the other side for concave and convex engagement, so it has a more reliable waterproof function. There is an effect that can be obtained. Furthermore, the positioning of the indicator lamp in the vertical, horizontal, and front-back directions can be performed accurately and easily by the uneven fitting between the fitting groove and the periphery of the lamp hole.
This has the effect of simplifying the positioning work of the indicator lamp.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts of the same, Fig. 3 is a front view of the main parts of the same, Fig. 4 is a side view of the main parts of the same, and Fig. 4 is a side view of the main parts of the same. Figure 5 is a perspective view of the main parts of the same as above, Figure 6 is an exploded perspective view of the main parts of the same as above,
Fig. 7 is a sectional view of the main part of the same as above, Fig. 8 is a perspective view of the main part of the same as above, Fig. 9 is a perspective view of main part of same as above, Fig. 10 is a sectional view of main part of same as above, and Fig. 11 is a conventional example. A perspective view of
FIG. 12a is a cross-sectional view of the main part of the same as above, and FIG. 12b is a front view of the main part of the same as above. 1 is an indicator lamp, 2 is a housing, 20 is a case, 20a, 20b, 20c are divided cases, 22
is the front plate, 23 is the lamp hole, 24 is the fitting groove, 36
36a is a convex rib, and 36a is a concave groove.

Claims (1)

[Scope of utility model registration request] A large image display with a large number of display lamps arranged in a matrix on the front of the housing with small gaps between them, and an image displayed by controlling the light emission of each display lamp using a display lamp drive circuit housed inside the housing. In a display device, a display module that integrates a plurality of display lamps is arranged in a row on the front of a housing, and a module case of the display module is divided into parts, and the display lamp is fitted into a joint on the front side of the divided case. A plurality of lamp holes are formed so as to straddle both the divided cases, a fitting groove into which the peripheral edge of the lamp hole is fitted is formed on the circumferential surface of the display lamp holder, and a fitting groove is formed in the circumferential surface of the display lamp holder, and A large image display device characterized in that a convex rib is provided on one side of the bonding surface and a concave groove is provided on the other side for uneven engagement.