JPH0544861Y2 - - 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. 12 and 13, a large-sized image display device of this type has a multicolor display lamp 1 having a square display surface 1a, which is mounted on 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 moving images such as video recorded on a videotape or images shot with a television camera may be displayed.

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 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 the minute gap 5. Figure 12a shows the conventional indicator lamp 1.
The lamp socket 34 is inserted into the lamp hole 31 of the support body 30 provided on the front surface of the housing 2 via the waterproof gasket 32, and is provided on the printed circuit board 33 on which the indicator lamp drive circuit is mounted. It is now being installed on
A waterproof gasket 32 inserted in the lamp hole 31 realizes a watertight structure between the lamp hole 31 and the indicator lamp 1. 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 intake port opening at the rear of the indicator lamp 1 and an exhaust port 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, in order to realize a watertight structure that prevents rainwater from entering the housing 2, a waterproof gasket 32 is provided corresponding to each indicator lamp 1. The problem is that the number of parts increases, the configuration becomes complicated, and assembly becomes 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 is easily attached at an angle, and the indicator lamp 1 is easily attached in the vertical and horizontal directions. There was a problem in that the arrangement pitch varied, and the state of attachment to the lamp socket 34 also varied, making it troublesome to position the lamps in the front-rear direction (positioning to make the display surface flush).

The present invention was developed in view of the above points, and its purpose is to realize a watertight structure with a simple configuration, and to easily position the indicator lamp in the vertical, horizontal, and longitudinal directions. Another object of the present invention is to provide a large-sized image display device that can simplify the positioning work of display lamps.

[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. A waterproof wall parallel to the front panel of the case is formed inside the module case, and the module case is divided into parts, and a lamp hole into which an indicator lamp is fitted is inserted between the front panel of the divided case and the waterproof wall, so that the lamp hole straddles both the divided cases. A plurality of fitting grooves are formed in the circumferential surface of the indicator lamp holder, into which the circumferential edges of both lamp holes are fitted.

[Function] The present invention is constructed as described above, in which a waterproof wall is provided parallel to the front plate of the module case of the display module that integrates a plurality of display lamps, and the module case is formed in sections to form the display module. A plurality of lamp holes into which the lamps are fitted are formed so as to span the joints of the front plate of the split case and the waterproof wall, and the peripheries of both lamp holes are formed on the peripheral surface of the display lamp holder. It fits into the fitting groove, making it possible to realize a watertight structure without using a waterproof gasket, and the structure is simple, making assembly easy. Also, since it has a double watertight structure, more reliable waterproof function can be obtained. In addition, due to the double uneven fitting between the fitting groove and the periphery of the lamp hole, the positioning of the indicator lamp in the vertical, horizontal, and front-back directions can be performed accurately and easily, thereby simplifying the positioning work of the indicator lamp. It is becoming possible to do this. Furthermore, if a drainage hole is formed between the front plate of the bottom plate of the lower split case and the waterproof wall, rainwater will not accumulate between the front plate and the waterproof wall and damage the double watertight mechanism. It can be prevented.

[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 passage 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 variations in the luminous efficiency of the display lamps 1 due to temperature changes are prevented, so that high-quality color images can be displayed.

Furthermore, 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 shade 7 is attached to the base of the shade 7 so that the vertical direction between the display lamps 1 is A waterproof plate part 8 is provided which is inserted into the minute gap 5 and faces the exhaust port 13 at an appropriate interval, and the base part of the shade 7 for contrast improvement is used to provide a waterproof plate part 8 formed between each indicator lamp 1. This prevents rainwater 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 a thin stainless steel plate into a predetermined shape, bending the upper light shielding part 7a, and forming the lower light shielding part 7a.
It is formed by cutting and raising b and applying black baking paint.

Here, in the present invention, 16 (8 x 2) display lamps 1 described above are integrated to form a display module 3 as shown in FIGS. 1 to 5,
Furthermore, this display module 3 is installed in 8 pieces (2 x 4
6) are integrated to form a display unit 4 as shown in FIG. 6, and a plurality of display units 4 are arranged in a matrix on the front of the housing 2 to display a large image with a predetermined number of pixels. . The display unit 4 is provided with a blower fan 42 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 5, 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 1 of the display lamp 1 is inserted into the module case 20.
It is formed by arranging a power supply printed circuit board 21 to which 5 is directly attached (soldered), and the power supply printed circuit board 21 includes a drive printed circuit board (not shown) on which a display lamp drive circuit is mounted. Connector 28 to be connected and ventilation hole 2 corresponding to intake port 12
9 is provided. In addition, the module case 20 of the display module 3 is divided into three parts in the vertical direction, with the front part divided into three parts and the rear part divided into two parts.
Upper cover 20b is placed above and below the central case body 20a.
and a lamp hole 2 formed by attaching the lower cover 20c and formed on the front surface of the module case 20.
3 are provided in plural numbers (eight pieces each) so as to straddle the joints between the case main body 20a, which is a divided case, and the upper and lower covers 20b and 20c, respectively. 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 case 20, and the periphery of the lamp hole 26, which is bored across the joint of the waterproof wall 25, is connected to the lamp holder 25. A second watertight structure is formed by fitting into a second fitting groove 27 formed on the circumferential surface of the cylindrical part, thereby providing a more reliable waterproof function. Furthermore, on the bottom plate of the bottom cover 20c,
A drain hole 35 is formed between the front plate 22 and the waterproof wall 25 to drain rainwater that has entered.
This prevents intruding rainwater from accumulating and damaging the double watertight structure. Further, a recess for forming a drainage gap is formed on the upper and lower surfaces of the front part of the display module 3, and when the display module 3 is stacked to form the display unit 4 as shown in FIGS. 7 and 8, A drainage gap 36 is formed between the upper and lower display modules 3, so that water drained through the drainage hole 35 can be smoothly drained.

[Effects of the invention] The present invention is constructed as described above, and includes providing a waterproof wall parallel to the front plate of the module case of a display module that integrates a plurality of display lamps, and forming the module case in sections. A plurality of lamp holes into which the indicator lamps are fitted are formed so as to span the joints of the front plate of the split case and the waterproof wall, and the peripheries of both lamp holes are formed on the peripheral surface of the indicator lamp holder. Since it is fitted into a fitted groove, a watertight structure can be achieved without using a waterproof gasket, and the structure is simple and assembly is easy. This has the effect of providing a more reliable waterproof function. Furthermore, due to the double uneven fitting between the fitting groove and the periphery of the lamp hole, the positioning of the indicator lamp in the vertical, horizontal, and front-back directions can be performed accurately and easily, thereby simplifying the positioning work of the indicator lamp. It has the effect of being able to

[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 a perspective view of the main parts of the same as above, and Figure 7 is a perspective view of the main parts of the same as above.
The figure is a side view of the main part of the same as the above, Fig. 8 is a side view of the main part of the same with a part cut away, Fig. 9 is a perspective view of the main part of the same as the above, Fig. 10 is a sectional view of the main part of the same as the above, and Fig. 11 is a sectional view of the main part of the same as the above. A perspective view of the conventional example, FIG.
Figure b is a front view of the main parts same as above. 1 is an indicator lamp, 2 is a housing, 20 is a module case, 20a, 20b, 20c are divided cases, 22 is a front plate, 23, 26 are lamp holes, 2
4 and 27 are fitting grooves, 25 is a waterproof wall, and 35 is a drain hole.

Claims (1)

[Claims for Utility Model Registration] (1) A large number of indicator lamps are arranged in a matrix with minute gaps on the front of the housing, and the light emission of each indicator lamp is controlled by an indicator lamp drive circuit housed in the housing. In a large image display device that displays an image, a display module that integrates a plurality of display lamps is arranged in a row on the front of the housing, and a display module that is parallel to the case front plate is placed inside the module case of the display module. A waterproof wall is formed, and the module case is formed separately, and a plurality of lamp holes into which indicator lamps are fitted are formed at the joint between the front plate of the divided case and the waterproof wall so as to straddle both divided cases. A large-sized image display device, characterized in that fitting grooves are formed in the circumferential surface of the display lamp holder into which the circumferential edges of both lamp holes are fitted. (2) A large-sized image display device according to claim 1, characterized in that a drain hole is formed between the front plate of the bottom plate of the lower divided case and the waterproof wall.