JPH0342461Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a light-emitting display body used as a sign board or the like that lights up and displays a predetermined display pattern in various lighting states.

2. Description of the Related Art As a light-emitting display with a fixed display pattern of this type, the present applicant has already proposed a structure as shown in FIGS. 10 and 11. That is, this light-emitting display has a mask plate 10 in which a large number of through holes 101 are formed in a matrix shape (in the illustrated example, an 8×8 matrix shape).
2 is superimposed on the display substrate 103, and the LED lamps 104 with leads are selectively housed in the through holes 101 so as to form a predetermined display pattern (Katakana "I" in the example). In addition to being attached to a substrate 103, a filter plate 105 having a visible light transmittance of about 50 to 85% is provided on the mask plate 102. The lighting display circuit is formed by using the LED lamp 10 as shown in FIG.
4 through the lead insertion holes 107, 107 of the display substrate 103, and solder the leads 106, 106 to the conductive pattern 108 on the back side of the display substrate 103, and do not attach the LED lamp 104. Lead insertion holes 10
This is done by inserting a bifurcated shorting pin 109 into the shorting pin 109 and soldering the shorting pin 109 to the conductive pattern 108.

Problems to be solved by the invention However, in the above-mentioned light-emitting display,
The shorting pins 109 must be inserted into the lead insertion holes 107, 107 at all locations where the LED lamps 104 are not attached and must be soldered to the conductive patterns 108 on the back of the display board, which increases the number of parts and reduces the manufacturing process. There are problems such as complexity.

Therefore, as shown in FIG. 12, we considered using a conductive paste 110 to electrically connect the conductive pattern 108 in areas where the LED lamp 104 is not attached. In this way, the shorting pin 109 becomes unnecessary, and the number of parts is reduced. However, in order to form a lighting display circuit, four steps are required: a step of applying the conductive paste 110, a step of heating and curing the applied conductive paste 110,
a step of inserting the leads 106, 106 of the LED lamp 104 into the lead insertion holes 107, 107 and mounting the LED lamp 104 on the display substrate 103;
A process of soldering the leads 106, 106 to the conductive pattern 108 is required, and since the LED lamp 104 with leads is used,
Since the step of drilling the lead insertion holes 107 in the display substrate 103 is also required, the manufacturing process cannot be significantly simplified.

This invention was made in view of such circumstances,
The purpose is to provide a light-emitting display that does not require any shorting parts such as the shorting pin 109 and can greatly simplify the manufacturing process.

Means for Solving the Problems In order to achieve the above object, the light emitting display of the present invention has a plurality of rows of conductive patterns having a plurality of cut portions formed on the surface of the display substrate, and A number of cut sections are selected to form a predetermined display pattern, and a leadless chip-type light emitting element is connected and fixed to the conductive pattern using conductive paste so as to straddle each of the selected cut sections. The other cut portions are connected with a conductive paste, and a mask plate in which at least through holes corresponding to the light emitting elements are formed is superimposed on the surface of the display substrate.

Effect of the invention According to the light emitting display having such a structure, the cut portion of the conductive pattern where the chip-type light emitting element is not connected and fixed is connected with the conductive paste, so that the shorting parts such as the shorting pin 109 used in the previous example can be connected. Nothing is needed. In addition, a leadless chip-type light-emitting element is used as a light-emitting element, and the chip-type light-emitting element is connected and fixed to the conductive pattern with conductive paste so as to straddle the selected cut portion of the conductive pattern. There is no need to drill lead insertion holes in the board. Moreover, the formation of the lighting display circuit involves three steps: applying conductive paste to both edges of the selected cut portion of the conductive pattern selected to constitute a predetermined display pattern and to the other cut portions;
This can be done by mounting a chip-type light emitting element so as to straddle the selected cutting section, and heating and curing the conductive paste.

Examples Hereinafter, the light-emitting display of the present invention will be described in detail with reference to examples.

FIG. 1 is a plan view showing an embodiment of the light emitting display of the present invention, and FIG. 2 is an enlarged sectional view taken along the line - - in FIG. A chip-type light emitting device is shown.

The display substrate 1 in this embodiment is manufactured by etching a copper-clad laminate whose base material is glass epoxy, paper phenol, etc.
As shown in Fig. 3, eight rows of conductive patterns 4 running horizontally on the surface of the substrate are formed, and each conductive pattern 4 has eight cut portions 5, making a total of 64 cuts on the entire surface of the substrate. The cutting portions 5 are arranged in an 8×8 matrix. The interval W between each cut portion 5 is set in the range of about 0.15 to 0.4 mm, taking into account the interval between the external electrodes of the chip-type light emitting element 3.

In the light-emitting display of this embodiment, 10 cut parts 5' are selected from among the 64 cut parts 5 so as to form the katakana "I", and FIGS.
As shown in the figure, a leadless chip-type light emitting element 3 is mounted so as to straddle each selected cutting section 5'. This light emitting element 3 is shown in FIG.
As shown in FIG. 2, it is a leadless chip type LED lamp in which an LED element 31 is sealed with a translucent sealing resin 32 such as an epoxy resin. A side external electrode 34 is provided. However,
By connecting and fixing these external electrodes 33 and 34 to the conductive pattern 4 via a conductive paste (such as epoxy silver paste) 6 as shown in FIG. They are arranged in a . On the other hand, the other unselected cutting parts 5 are electrically connected by applying conductive paste 6 as shown in FIGS. 1 and 2. In this way, a lighting display circuit is formed in which light emitting elements 3 are connected in series in each horizontal row.

On the display substrate 1 as described above, as shown in FIGS. 1 and 2, there is a mask plate 2 in which 8×8 mortar-shaped through holes 7 are formed vertically and horizontally in correspondence with the cut portions 5.
are superimposed on each other and are fitted and attached to the substrate 1 with fasteners such as screws (not shown). This mask plate 2 is used to improve visibility by enlarging the apparent light emitting dots and preventing light from leaking to adjacent light emitting parts.
Preferably, the surface of the mask plate 2 is a black or gray light absorbing surface, and the tapered inner circumferential surface 8 of the through hole 7 is a light reflecting surface. Incidentally, this mask plate 2 has all the cutting parts 5, as in this embodiment.
It is not necessary to form the through hole 7 corresponding to the chip type light emitting element 5', and it is sufficient if the through hole 7 is formed at least corresponding to the chip type light emitting element 3.

In such a light emitting display, for example, as shown in FIG. 4, one end of each conductive pattern 4 is connected to the (+) side of a DC power source 10 via a current adjustment resistor r and a blinking control circuit 9. Connect the other end to DC power supply 1
By connecting to the (-) side of 0 and performing blinking control with the blinking control circuit 9, the chip-type light-emitting elements 3 can be blinked in one horizontal row or every multiple rows, or all the chip-type light-emitting elements 3 can be blinked at the same time. It is possible to display the display pattern "A" in a desired blinking manner, such as by turning the display pattern "A" on. Therefore, by using a plurality of such light-emitting display bodies in combination, a sign board or the like that lights up and displays a predetermined display pattern in various blinking manners can be obtained.

In addition, in manufacturing the light emitting display as described above, conductive paste is applied to both edges of the selected cut portion 5' of the conductive pattern 4 selected to constitute a predetermined display pattern and to the other cut portions 5. a step of applying conductive paste 6, a step of mounting the chip-type light emitting element 3 so as to straddle the selective cutting section 5', and a step of applying conductive paste 6.
The process of heating and curing (for example, 30 degrees at 100 to 150 degrees)
A lighting display circuit can be formed through the three steps (conditions of 1 minute to 2 hours), and lead insertion holes are drilled in the display board as in the case of using leaded LED lamps. This eliminates the need for additional steps, making it possible to greatly simplify the manufacturing process. Furthermore, since the cut portion 5 to which the chip-type light emitting element 3 is not attached is connected with the conductive paste 6, there is no need for any shorting pins, etc., and the manufacturing cost can be reduced by reducing the number of parts.

FIG. 5 is a partial sectional view showing another embodiment of the present invention. According to this light-emitting display, the mask plate 2 has a smoke color or a light transmittance of about 50 to 85% over the entire visible light range. A brown filter plate 11 is provided. When such a filter plate 11 is provided, visible light from the outside is absorbed twice when it is incident and when it is reflected, whereas light from the light emitting element 3 is absorbed once when passing through the filter plate 11. Since the light is only absorbed, the brightness contrast between the light emitting part and other parts is increased, which has the advantage of further improving visibility. Since the other configurations are the same as those of the previous embodiment, corresponding parts are only given corresponding symbols and detailed explanations are omitted.

In all of the above embodiments, each conductive pattern 4 is one series, but for example, there may be two series of conductive patterns 4a as shown in FIG. 6A, or three series of conductive patterns 4a as shown in FIG. 6B. A pattern 4b is provided, and two patterns as shown in Fig. 8 A and B are provided correspondingly.
Four external electrodes 33a, 33a, 34a, LED elements 31a, 31a sealed with sealing resin 32a,
34a, or three LED elements 31b, 3 as shown in FIG.
Six external electrodes 33b, 33b, 33b, 34b, 34 with 1b, 31b sealed with sealing resin 32b
The chip type light emitting element 3b having the shapes b and 34b may be mounted across the cutting portion 5'.
With such a configuration, it is possible to perform multiple light emission through blinking control, and when the respective LED elements emit light in different colors, it is also possible to emit light in multiple colors, and there is an advantage that a variety of lighting displays can be performed.

Effects of the Invention As is clear from the above explanation, the light emitting display of the present invention eliminates the need for shorting parts such as shorting pins, making it possible to reduce the number of parts. The manufacturing process can be greatly simplified because the drilling process is not required and the lighting display circuit can be formed in just three steps.
Therefore, it is possible to achieve the effect of reducing manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, Fig. 3 is a plan view of the display substrate of the embodiment, and Fig. 4 is a usage pattern. An explanatory diagram of one example, Fig. 5 is a partial sectional view of another embodiment of the present invention, and Figs. 6 A and 6 are plan views of main parts of still another embodiment of the present invention without the LED lamp installed. , Fig. 7 A and B, Fig. 8 A and B, and Fig. 9 A and B are perspective views and internal circuit diagrams showing different examples of chip-type light emitting elements, respectively, and Fig. 10 shows a filter plate partially cut away. Perspective view of conventional example, 1st
1 is an enlarged sectional view taken along the line -- in FIG. 10, and FIG. 12 is a partial sectional view of another conventional example. 1...Display body substrate, 2...Mask board, 3, 3
a, 3b...chip type light emitting element, 4, 4a, 4b
...Conductive pattern, 5, 5'... Cutting part, 6...
Conductive paste, 7...through hole.

Claims (1)

[Scope of utility model registration request] A plurality of rows of conductive patterns each having a plurality of cut portions are formed on the surface of a display substrate, a number of cut portions are selected from all the cut portions so as to constitute a predetermined display pattern, and each of the selected cut portions is A leadless chip-type light emitting element is connected and fixed to the conductive pattern using conductive paste so as to straddle the cut portion, and the other cut portions are connected using conductive paste.
A light-emitting display comprising a mask plate having through holes formed therein corresponding to at least light-emitting elements and superimposed on the surface of a display substrate.