JPH01172889A - Dot matrix light emitting display body and its manufacture - Google Patents

Abstract

PURPOSE:To clearly visualize the display even when it is light, and also, to improve the visibility at night by condensing a radiant ray emitted from a light emitting display part by a convex lens function of a spherical body. CONSTITUTION:In a light emitting display part 2, a spherical body 15 having light transmissivity is placed in an opening part of a through-hole part 5 formed on a mask plate 4. In this regard, as for the spherical body 15, it is both allowed to fix it by joining it with a resin layer 8 and to fix it by joining it with the mask plate 4. Accordingly, since the spherical body 15 of the light emitting display part 2 has a convex lens function, a radiant ray emitted from a light emitting chip 6 passes through the resin layers 7, 8, and thereafter, condensed in parallel, for instance, as an arrow A or to the center of the spherical body 15 by the spherical body 15. In such a way, the radiant ray from the light emitting display part 2 has sharp directivity, and even when it is alight as daytime, the radiant ray is visualized clearly from a distance. Also, when it is dark as night, etc., an intense light beam is radiated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light-emitting display in which characters, figures, etc. are displayed by selectively emitting light from a large number of dot-shaped light-emitting display parts, and a method for manufacturing the same.

[Conventional technology]

As shown in Figure 2, the dot matrix light emitting display is
A display panel 1 has dot-shaped light-emitting display sections 2 lined up in a matrix array vertically and horizontally. Characters, figures, etc. are displayed by selectively emitting light from a large number of light-emitting display sections 2, and in some cases, light-emitting areas can be It is made to move continuously so that the display of characters, figures, etc. flows horizontally, vertically, or diagonally, and is used in a wide range of fields such as store displays and message boards. Examples of the arrangement of the light emitting display section include an 8.times.8 dot matrix arrangement, a 16.times.16 dot matrix arrangement, etc., and a plurality of these are arranged in rows and columns.

In such a light-emitting display, the luminance of the emitted light from the light-emitting display section 2 may be relatively low, but in some cases a wide viewing angle is required, and in other cases, the viewing angle is not so necessary but high brightness is required. Various types of light-emitting displays have been proposed to meet individual requirements.

This is because when using a light source with the same amount of light, widening the viewing angle reduces the brightness at the viewing position, and narrowing the viewing angle increases the brightness.

FIG. 3 exemplifies the structure of a light emitting display section 2 of a light emitting display body with a wide viewing angle for emitted light. As shown in the figure, the light-emitting display section 2 of this type of light-emitting display consists of a substrate 3 inside a through hole 5 of a mask plate 4 laminated on a substrate 3 (a circuit board on which an X-Y dynamic lighting circuit is formed). A light-emitting chip 6 such as an LED light-emitting element is sealed on the surface with a transparent resin layer 7 such as an epoxy resin, and a transparent resin layer 8 such as a silicone resin or an epoxy resin is placed thereon. The surface 9 of the resin layer 8 is recessed into a spherical shape to diffuse the emitted light over a wide range of surroundings. This light-emitting display has the advantage that wiring processing etc. can be easily performed and it can be manufactured at low cost.

FIG. 4 exemplifies the structure of a light emitting display section 2 of a light emitting display body in which radiation light is required to have directivity. As shown in the figure, the light-emitting display portion 2 of this type of light-emitting display is a hole 1) in a mask plate 10.
A dot-matrix light-emitting display (not shown) is constructed by inserting a bullet-shaped light-emitting lamp 12 into the dot and holding it on a circuit board, etc. provided at the bottom of the dot-matrix light-emitting display. It is now given directionality.

By the way, in light-emitting displays, such as traffic information displays installed mainly on outdoor roads, where visibility from a distance is more important than visibility from up close, the direction of the emitted light is Since it is a good idea to use a light-emitting display with increased brightness due to its brightness, a light-emitting display body having the light-emitting display portion 2 illustrated in FIG. 4 rather than the light-emitting display portion 2 illustrated in FIG. 3 has been used in the past. It was used.

[Problem that the invention seeks to solve]

However, in the dot matrix light emitting display having the light emitting display section 2 shown in FIG. 4, the light emitting lamp 12 itself has LED chips arranged and wired in advance and sealed with a transparent resin layer so as to have a convex lens function. Since the LED chips are mounted and wired on a printed circuit board, etc., they are more expensive than those in which a single LED chip is directly mounted on a circuit board. Therefore, a light emitting display using a large number of light emitting lamps 12 becomes considerably expensive. Become. In addition, since two electrode wires 13 are usually drawn out from the light emitting lamp 12, two or three electrode wires must be processed for each light emitting lamp 12 during wiring processing, and this causes the printed circuit board to be damaged. Soldering to the wires caused complicated work.

On the other hand, the light-emitting display having the light-emitting display section 2 explained in FIG. 3 is cheaper than the one shown in FIG. So it's not that complicated.

Therefore, the present invention improves the light emitting display body having the light emitting display section 2 shown in FIG.
The purpose of the present invention is to provide a light-emitting display that is inexpensive and does not require complicated wiring, and a manufacturing method thereof, which improves the economic efficiency and wiring processing problems of the one shown in Fig. 4. do.

[Means for solving problems]

In order to achieve the above object, the dot matrix light emitting display of the present invention is a dot matrix light emitting display in which a mask plate having through holes corresponding to each of the light emitting chips is arranged on a substrate on which light emitting chips are arranged. In the mask plate, a light-emitting chip is sealed in a transparent resin layer in a transparent portion of a mask plate, and a transparent sphere is arranged in an opening of the transparent hole. .

Further, in the method for manufacturing a dot matrix light emitting display of the present invention, when a light emitting chip is sealed in a transparent resin layer in a transparent hole of a mask plate, the transparent resin layer is simultaneously applied to a transparent resin layer in the transparent hole. The spheres are arranged and bonded to and fixed to the resin layer.

[For production]

According to the light emitting display of the present invention, the emitted light emitted from the light emitting chip is collected by the sphere, and the directivity of the emitted light is improved.

According to the method for manufacturing a light emitting display of the present invention, when sealing the light emitting chip, the spheres are simultaneously bonded and fixed by the resin layer used for sealing, so a special process for fixing the spheres is required. becomes unnecessary.

〔Example〕

FIG. 1 illustrates a light emitting display section 2 of a light emitting display according to an embodiment of the present invention. As an example of the arrangement of the light emitting display section 2, the second
As explained in the figure, 8x8 dot matrix array and 1
A typical example is a 6 x 16 dot matrix array, but any number of arrays other than these may also be used.Also, even if the planar shape of the light emitting display section 2 is circular as shown in FIG. Other shapes, such as polygons such as squares, may also be used.

The light emitting display section 2 of FIG. 1 is different from the light emitting display section 2 of FIG. There are only dots. Therefore, parts or elements that are the same as or corresponding to those in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.

Glass beads or resin beads can be used as the sphere 15, but if the light emitting display is to be installed outdoors, glass beads with excellent weather resistance may be used to prevent light transmission due to deterioration. It is desirable to have a comb that does not cause deterioration of sexiness. Further, the sphere 15 may be bonded and fixed to the resin layer 8 or may be bonded and fixed to the mask plate 4.

However, if an air layer is trapped between the sphere 15 and the resin layer 8, the air layer will expand due to the heat generated by the light emission of the light emitting chip 6, which may have an adverse effect on the sphere 15. It is desirable that the sphere 15 be bonded to the resin layer 8 so that it is difficult to cause this. For the resin layer 8, silicone resin or epoxy resin can be used. When an epoxy resin is used for the resin layer 8, the resin layer 8
Since the sphere itself has adhesive properties, there is an advantage that the sphere 15 can be bonded and fixed to the resin layer 8 at the same time when the resin layer 8 covers the resin layer 7 below it. Furthermore, the resin layer 7 that seals the light emitting chip 6 and the resin layer 8 that covers this resin layer 7 do not necessarily need to be formed as separate layers; for example, both layers 7 and 8 are made of epoxy resin. It may be formed as a single layer.

According to such a light emitting display, the sphere 1 of the light emitting display section 2
5 has a convex lens function, after the emitted light from the light emitting chip 6 passes through the resin layer 7.8, it is focused by the sphere 15 either parallel to the arrow A or at the center of the sphere 15. Therefore, the emitted light from the light emitting display section 2 has sharp directivity, and the emitted light can be clearly seen from a distance even in bright daylight. It also emits strong light when it is dark, such as at night.

Next, a method for manufacturing a light emitting display according to an embodiment of the present invention will be described.

After forming a laminate of the substrate 3 and mask plate 4, a resin layer 7.
8 is filled in the through hole 5 of the mask plate 4 where the light emitting chip 6 is placed, and the sphere 15 is placed thereon, and the sphere 15 is bonded and fixed to the resin layer 8.

In this way, the sealing of the light emitting chip and the fixing of the sphere are performed simultaneously in a single process. Note that the resins N7 and 8 may be formed as separate layers, or both layers 7.8 may be formed as a single layer of epoxy resin.0 When both layers 7.8 are formed separately In this step, a resin layer 8 is filled and a sphere 15 is placed on top of the resin layer 8.

〔Effect of the invention〕

As described above, the light-emitting display of the present invention condenses the emitted light from the light-emitting display part by the convex lens function of the sphere and exhibits sharp directivity and improved brightness, so it can be clearly seen even in bright daylight. It can be suitably used as a traffic information board, etc., where the display is required to be visible. Also,
It can also be suitably used when it is desired to enhance visibility with strong light at night. Moreover, the configuration is simply that the sphere is placed in the light-emitting display section as explained in Figure 3, and it does not use expensive light-emitting lamps like the one in Figure 4, making it inexpensive and eliminating the need for complicated wiring. .

Furthermore, in the method for manufacturing a light emitting display of the present invention, the sphere is bonded and fixed when the light emitting chip is sealed, so the sealing of the light emitting chip and the fixing of the sphere are performed simultaneously in a single process. Therefore, there is almost no difference in the manufacturing process compared to the light-emitting display body having the light-emitting display section shown in FIG. 3, and there is an advantage that the manufacturing process is extremely simple in combination with the simple wiring process.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing a light-emitting display portion of a light-emitting display according to an embodiment of the present invention, FIG. 2 is a plan view of the light-emitting display, and FIG.
FIG. 4 is a cross-sectional view illustrating a light-emitting display section of a conventional light-emitting display. 4...Mask plate, 5...Through hole part, 6...Light emitting chip, 7.8...Resin layer, 15... Sphere. Patent applicant Takiron Co., Ltd. Figure 1 Figure 2

Claims (2)

[Claims] (1) In a dot matrix light emitting display in which a mask plate having a through hole corresponding to each of the light emitting chips is arranged on a substrate on which light emitting chips are arranged, the light emitting chips are transparent in the through holes of the mask plate. A dot matrix light-emitting display body sealed with a resin layer having a light property and comprising a light-transmitting sphere disposed in an opening of the through hole. (2) When sealing the light emitting chip with a transparent resin layer in the transparent hole of the mask plate, at the same time, a transparent sphere is placed in the transparent hole and bonded to the resin layer. A method for manufacturing a fixed dot matrix light emitting display.