JPH0230021B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device that displays a desired pattern by disposing a plurality of display materials.

BACKGROUND OF THE INVENTION Display devices that display alphanumeric characters or figures by applying electric signals to matrix wiring include devices that use display materials such as incandescent bulbs, phosphors, discharge gas, liquid crystals, and light emitting diodes (LEDs). In order to arrange various display materials in a matrix and send electrical signals to each one independently, the display materials and matrix wiring are first connected using various methods suitable for the materials, such as pressure bonding, sealing, wire bonding, etc. . It is also necessary to provide input/output terminals in a part of the matrix wiring formed of various materials such as a transparent conductive metal film. The display device is driven by selectively sending electric signals suitable for various display materials to the input/output terminal members.

A conventional display device will be explained with reference to FIG. FIG. 1 schematically shows a display device using LEDs, which have been attracting the most attention as a display material in recent years. FIG. 1 shows an insulating base 11 made of ceramic, for example.
Arrange matrix wiring 12 and LED 13 on top,
Input/output terminal member x ₁ at the end of matrix wiring 12 ~
x ₄ and y ₁ to _{y 4} are formed. Normal matrix wiring is, for example, 5 columns and 7 rows (5 x 7).
There are alphanumeric displays composed of
In the figure, for ease of explanation, there are 4 columns and 4 rows (4 rows).
×4) basic form was used. In this Figure 1,
If the first wiring group is formed by the four horizontal rows of the matrix wiring 12, the input/output terminal members x ₁ to x ₄ become the terminal member group X , and the second wiring group is formed by the four vertical columns of the matrix wiring 12.
If a wiring group is formed, the input/output terminal members y ₁ to y ₄ become a terminal member group Y.

In the above configuration, the display device is driven and images are displayed by sending a negative electrical signal to the terminal member group X and a positive electrical signal to the terminal member group Y.

However, as described above, terminal member groups X and Y
In a display device having a structure in which the terminal member X and Y become an obstacle. Therefore, it has been impossible to provide continuity to the displayed image by constructing a matrix wiring with fine burst pitches (uniformly arranged pitches). That is, when a plurality of display devices are connected to form a large display device, it has been impossible to obtain a display device with a high density arrangement.

The present invention addresses the above-described drawbacks of the prior art and provides a display device that has a high density array and can be made large.

That is, the present invention provides a matrix type display device using various display materials.
This is a display device in which a group of input/output terminal members are dispersed within a region surrounded by the outer ends of matrix wirings and at intervals substantially greater than the intervals of matrix wirings.

An embodiment of the present invention will be described below with reference to FIGS. 2, 3, 4, and 5.

2 is a plan view of the display device schematically shown in correspondence with FIG. 1, and FIG. 3 is a sectional view taken along the line E--I' of FIG. 2. First, the basic configuration will be explained based on FIGS. 2 and 3. Similar to FIG. 1, FIGS. 2 and 3 are shown in a basic form of 4 columns and 4 rows (4×4) for ease of explanation. In FIGS. 2 and 3, reference numeral 21 denotes an insulating base made of ceramic, and matrix wiring 22 is provided on this base 21.
LEDs 23 are provided corresponding to the intersections of the matrix wirings 22 (16 locations). Then, corresponding to the matrix wiring 22, input/output terminal members x ₁ to x ₄ (circles indicated by dotted lines in the figure) and y ₁ to _{y 4}
(square marks indicated by dotted lines in the figure) are provided.
The input/output terminal members x ₁ to x ₄ and y ₁ to y ₄ are distributed within a region surrounded by the outer end of the matrix wiring 22 and at intervals greater than the interval of the matrix wiring 22. . In FIG. 2, the input/output terminal members x ₁ to x ₄ and y ₁ to y ₄ are illustrated in larger numbers than their actual shapes in order to make it easier to understand. Further, the above-mentioned matrix wiring 22 includes the wiring 22a shown in FIG. 1, which is a vertical wiring, and the second wiring 22, which is a horizontal wiring.
2b, and this first wiring 22
a and the second wiring 22b are electrically insulated, that is, insulated by an insulator 24, at least at the portion where they intersect. Furthermore, each LED 23 is provided on a second wiring 22b, and the input/output terminal members x ₁ to x ₄ (x ₄ in FIG. 3) are connected to this second wiring 22b.
are connected to each other, and the upper end side of each of the LEDs 23 is connected to the first LED via a lead wire 25 made of gold (Au).
This first wiring 22a is connected to the first wiring 22a.
The input/output terminal members y ₁ to y ₄ (in Fig. 3) are
y ₃ and y ₄ ) are connected. The display device A configured in this way has input/output terminal members x ₁ to _{x 4}
Any image can be displayed by selectively sending electrical signals to y ₁ to _{y 4} . For example, as shown in FIG. 4, a plurality of display devices A ₁ ,
A ₂ ... A ₁₁ ... A ₂₁ ... _A
Since LED 2 is not installed on the outside of LED 2, a continuous part of the display device, for example, the connecting part of A ₁ and A ₂ ,
3 does not change, resulting in a substantially high-density display device A. When actually driving this display device A , 256 LEDs 23 (16×
16), and if a plurality of these display devices are connected to display, for example, an address, the result will be as shown in FIG. That is, the effects of the present invention can be clearly demonstrated. The parts shown in Fig. 5 are shaded to make them easier to understand, and the input/output terminal members x ₁ to 1 on the back side are
x ₁₆ and y ₁ to _{y 16} are indicated by black circles and black squares, respectively.

In the above embodiment, the input/output terminal member is provided at the intersection of the first wiring 22a and the second wiring 22b, but as shown in FIG.
It may be provided at a point other than the intersection of the wiring 22a and the second wiring 22b. Providing the input/output terminal members x ₁ to x ₄ and y ₁ to y 4 at locations other than the intersecting portions is advantageous in terms of insulation separation when taking out the input/output terminal members x 1 to x 4 and y 1 to y ₄ . This FIG. 6 is a diagram corresponding to FIG. 4 shown in the above embodiment, and is a plan view when a plurality of small display devices are arranged in series.

Next, as another embodiment of the present invention, a display device capable of displaying multiple colors will be described with reference to FIGS. 7 and 8. FIG. 7 is a schematic plan view showing the input/output terminal members x ₁ to x ₄ , y ₁ to _{y 4} ,
y′ ₁ to y′ ₄ are shown close to their actual sizes,
Fig. 8 is a sectional view taken along the Ro-Ro' line in Fig. 7, and for ease of explanation, these Figs. ×4) is shown in the basic form. In FIGS. 7 and 8, 81 is an insulating base made of ceramic, and matrix wiring 82 is provided on this base 81.
LEDs 83a and 83b (not shown in FIG. 7) are provided corresponding to the intersection points (32 locations) of the matrix wiring 82. In the embodiment, one of the LEDs 83a and 83b provided at the intersection of the matrix wiring 82 is a GaP red LED and the other is a GaP green LED, and these are provided in pairs. There is.
In other words, when actually driving, two
The LED becomes one light-emitting pixel, and for example, if you drive only one, it will emit red or green light, but if you drive both, it will display yellow to orange (the emitted color may vary slightly depending on the luminous efficiency of both). It is now possible to display different results. Corresponding to the matrix wiring 82, input/output terminal members x ₁ to _{x 4} (circles indicated by solid lines in the figure), y ₁ to y ₄ (square marks indicated by solid lines in the figure), y' ₁ to y' ₄ (diamond mark indicated by a solid line in the figure). The input/output terminal members x ₁ to x ₄ , y ₁ to y ₄ and y' ₁ to y' ₄ are arranged within a region surrounded by the outer end of the matrix wiring 82 and at a distance substantially greater than the interval of the matrix wiring 82 . They are distributed at intervals of . Further, the matrix wiring 82 includes a first wiring 82 which is a vertical wiring.
a and 82a', and the second wiring 82 which is the horizontal wiring.
b, and the first wirings 82a and 82a' are provided close to each other as a pair, and the first wirings 82a and 82a' and the second wiring 82b
are electrically insulated, that is, insulated by an insulator 84, at least at the portion where they intersect. Furthermore, each
The LEDs 83a and 83b are provided on a second wiring 82b, and the input/output terminal members x ₁ to x ₄ are connected to the second wiring 82b.
The upper end sides of 83a and 83b are connected to first wirings 82a and 8, respectively, via lead wires 85 made of gold leads.
2a', and input/output terminal members _y1 to _y4 and _y'1 to _y'4 are connected to this first wiring. With this configuration, a multi-color display device can be obtained, and an example of its manufacturing method will be briefly described as follows. First, gold paste-insulating material-gold paste is formed into a desired pattern on the insulating substrate 81 by a printing method, and is solidified by firing at about 1000°C. At this time, input/output terminals x ₁ to x ₄ , y ₁ to y ₄ , and y' ₁ to y' ₄ are also fired at the same time so that they are integrated. Through this firing process, the gold paste becomes a matrix wiring 82 made of gold, and the insulating material becomes an insulator 84 made of ceramic. The red LED 83a and green LED
The LEDs 83b are brought close together and fixed via conductive paste. After this, each LED83a and 83b
and the first wirings 82a and 82'a are wire-bonded using gold wire. Finally, protect the display surface to which the LED is fixed with epoxy resin (not shown)
to obtain a display device.

Here, the features of the present invention will be described. It is possible to increase the size of the display device by making it possible to connect the display devices, which was difficult with the conventional structure of the display device described with reference to FIG. An output terminal member is provided below the matrix wiring, and the input/output terminal members are distributed within the matrix wiring. In particular, in the case of a display device with a high-density arrangement as explained in FIGS. 4 to 6, by arranging the input and output terminals as shown, a display device that can be connected without shorting between terminal members can be manufactured. I was able to do that.

In addition, in the above example, as a display material
Although the case where LEDs are used has been described, liquid crystal or the like may also be used as the display material. However, in the case of liquid crystals, the driving method is slightly different.

Furthermore, the arrangement of the input/output terminal members is not limited to the above embodiment, and can be modified in various ways. Furthermore, the manufacturing method need not be limited to the above embodiments.

[Brief explanation of drawings]

FIG. 1 is a plan view schematically showing a conventional display device, FIG. 2 is a plan view schematically showing the basic configuration of the display device of the present invention corresponding to FIG. 1, and FIG. A cross-sectional view taken along line A-A' in the figure, Figure 4 is a plan view of a larger display device by connecting multiple display devices of Figure 2, and Figure 5 is a larger display device. A plan view when an address is displayed, FIG. 6 is a plan view corresponding to FIG. 4 showing a modification of the installation location of the input/output terminal member, and FIG. 7 is a multi-color display showing another embodiment of the present invention. The plan view when displayed, Fig. 8, is the low view of Fig. 7.
FIG. 21... Insulating substrate, 22... Matrix wiring, 23... LED, 24... Insulator, 25...
Lead wires, x ₁ to x ₄ and y ₁ to _{y 4} ... input/output terminal members.

Claims (1)

[Claims] 1. An insulating base provided so that a plurality of first wirings and a plurality of second wirings are insulated and intersect with each other;
A specific type of light emitting diode is provided corresponding to the intersection of the wirings on the side where the respective wirings are provided on the insulating substrate, and a light emitting diode of a specific type is provided on the side opposite to the side where the respective wirings are provided on the side of the base body where the respective wirings are provided. and a terminal member for directly sending a drive signal to the light emitting diode provided corresponding to the wiring, wherein the terminal member is provided in a region surrounded by an outer end of each of the wirings. Under each of the above wiring,
The first wiring or the second wiring adjacent in parallel
1. A display device characterized in that the display device is distributed at intervals equal to or greater than the intervals between the wiring lines.