JPH0114046Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electroluminescent display panel (hereinafter referred to as an EL panel).

Figure 1 shows a partially cutaway perspective view of a conventional EL panel.
Further, FIG. 2 shows a partial sectional view thereof.

on the surface of transparent glass substrate 1 as shown in the figure.
A plurality of transparent electrodes 2 made of In ₂ O ₃ or the like are arranged at equal pitches. The back electrode 3 is made of a conductive material with low electrical resistance such as Al, and the transparent electrode 2
Multiple pieces are arranged at equal pitches so that they are orthogonal to each other. As shown in FIG. 2, an insulating layer 5, a light emitting layer 6, and an insulating layer 7 are sequentially laminated between the transparent electrode 2 and the back electrode 3. Further, the back side of the EL panel is sealed with a sealing plate 4 to prevent moisture, and a sealing liquid chamber 8 is filled with insulating oil. Characters or pixels on the EL panel are displayed from the glass substrate 1 side by applying a charge between the transparent electrode 2 and the back electrode 3 at the required timing and emitting light from the selected intersection of both electrodes. There is. Conventionally, the connection between the EL panel and a control circuit (not shown) is as shown in FIG. The other end of the terminal pattern 26 is connected to a drive circuit 10 mounted on the surface of the flexible substrate 25, and the drive circuit 10 is integrated into an IC. Further, the drive circuit 10 is connected to a control circuit (not shown) through an input terminal pattern 11, and is controlled by the control circuit to scan the transparent electrode 2 or the back electrode 3 line by line. Light is emitted in a matrix from the selected intersections of both electrodes 2 and 3, and characters or pixels are displayed from the glass substrate 1 side. Input terminal pattern 1
The number of terminal patterns 1 is much smaller than the number of terminal patterns 26 because it only controls the drive circuit 10.

In this way, conventionally, the transparent electrode 2 or the back electrode 3
The connection between the terminal pattern 26 and the transparent electrode 2 is made by soldering, and since both the electrodes 2 and 3 are arranged in high density, the transparent electrode 2 and the back electrode 3 are connected to each other by soldering.
The disadvantage is that it takes a long time to align the terminal pattern 26 with the terminal pattern 26.

Note that the terminals are shortened every other line at the ends of the transparent electrode 2 and the back electrode 3, for example, the transparent electrode 2b is made shorter than 2a on one side of the glass substrate 1, and the transparent electrode 2b is made shorter on the other side of the glass substrate 1. When connecting to the terminal pattern 26 by making the transparent electrode 2a longer than the transparent electrode 2a on one side,
If the connection is made on both sides of the glass substrate 1, such as connecting to the transparent electrode 2b on the other side, the pitch of the connecting terminals will be doubled and the connection will be easier, but the line between both electrodes 2 and 3 will be Since the number reaches several hundred, there are drawbacks such as the fact that the time required for positioning the connection terminals cannot be reduced much.

In order to eliminate these conventional drawbacks, the present invention mounts the drive circuit on the sealing plate, connects the electrode terminals of the EL panel on the board surface, and uses a flexible board to connect only the control circuit. An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 3 is a partially cutaway perspective view showing an embodiment of the EL panel of the present invention. As shown in the figure, transparent electrodes 2 and back electrodes 3 are arranged on the surface of a glass substrate 1 so as to cross each other. There is.

The cross section of the EL panel is the same as that described in FIG. Further, as described above, the transparent electrode 2 and the back electrode 3 are made shorter every other line on one side of the glass substrate 1, and the short lines are made longer on the other side, so that they are driven on both sides. .

As shown in FIG. 4, the sealing plate 4 has a concave sealing liquid chamber 8 surrounded by a mounting gap 14, and is provided on four sides of the sealing plate 4 on the surface of the glass substrate 1. A drive circuit is provided with a connection pattern 9 arranged so as to be twice the pitch of the transparent electrode 2 and back electrode 3, and mounted on the surface A of the sealing plate 4 opposite to the sealing liquid chamber 8. The connection pattern 9 is extended to the surface A so as to be connected to the terminal 10. and drive circuit 1
An input terminal pattern 11 is provided which is connected to a control signal input terminal (not shown) for controlling 0.

The sealing plate 4 is adhered to the glass substrate 1 with the transparent electrode 2, the back electrode 3, and the connection pattern 9 overlapping each other as shown in FIG. After adhesion, the transparent electrode 2 and back electrode 3 are joined to the connection pattern 9 by soldering or the like. As another method of bonding, soldering can be facilitated by placing bonding pins at the ends of the transparent electrode 2 and back electrode 3 at the ends of the glass substrate 1, bringing the bonding pins into contact with the connection pattern 9, and soldering.

Connection between the drive circuit 10 and a control circuit (not shown) is made using an input terminal pattern 11 and a flexible substrate 12.
The input terminal pattern 11 and patterns 13 arranged at equal pitches are connected to each other by soldering or the like, and the other end of the pattern 13 is connected to a control circuit. Since the input terminal pattern 11 is a control signal input terminal for controlling the drive circuit 10, the number is smaller than the number of transparent electrodes 2 and back electrodes 3, but the rate of decrease depends on the circuit configuration of the drive circuit 10. It's different. In this way, the number of input terminal patterns 11 can be extremely reduced, making connection with the pattern 13 easier.

In this way, the transparent electrode 2 and the back electrode 3
The connection between the drive circuit 10 and the drive circuit 10 is made by adhesively fixing the sealing plate 4 on which the drive circuit 10 is mounted to the glass substrate 1, and then joining by soldering. Since the number of lines is very small, alignment with the pattern 13 provided on the flexible substrate 12 is very easy, and there is an advantage that the connection time can be shortened.
In this embodiment, the case where the connection between the input terminal pattern 11 and the pattern 13 is performed by soldering has been described. However, if a connector is provided at the end of the input terminal pattern 11 and the pattern 13, the connection between the drive circuit 10 and the control circuit can be made. This makes it easy to remove and also makes it easy to remove.

As explained in detail above, the present invention mounts a drive circuit on the back surface of the sealing plate, and connects the transparent electrode and the back electrode to a pattern patterned on the back surface of the sealing plate. , the connection to the flexible board only needs to be made with the control signal pattern, which has the effect of simplifying the connection and allowing high-definition
Can be used for EL panel mounting equipment.

[Brief explanation of drawings]

Figure 1 is a partially cutaway perspective view of a conventional EL panel.
Figure 2 is a partial sectional view of the same, and Figure 3 is the present invention.
FIG. 4 is a partially cutaway perspective view showing an embodiment of the EL panel, and FIG. 4 is a partially cutaway perspective view of the sealing plate. DESCRIPTION OF SYMBOLS 1... Glass substrate, 2... Transparent electrode, 3... Back electrode, 4... Sealing plate, 5, 7... Insulating layer, 6...
...Light emitting layer, 8...Sealing liquid chamber, 9...Connection pattern, 10...Drive circuit, 11...Input terminal pattern, 12...Flexible substrate, 13...Pattern.

Claims (1)

[Scope of utility model registration request] A plurality of striped transparent electrodes, a first insulating layer, a light emitting layer, a second insulating layer, which are sequentially laminated on a transparent substrate, and are disposed perpendicular to the transparent electrodes. An electroluminescent display panel having a structure in which a matrix-driven electroluminescent light emitting element section consisting of a plurality of striped back electrodes is sealed with a sealing plate, wherein each of the transparent electrodes and each back electrode Connection terminals are arranged around the periphery of the transparent substrate, and electrode patterns extending from the surface of the sealing plate opposite to the surface that seals the back surface of the light emitting element section are arranged on each electrode arranged on the light emitting element section. are arranged at equal pitches with the connection terminals of the electrodes, and one end of the electrode pattern is joined to the connection terminals of each of the electrodes,
The IC chip of the drive circuit is mounted so that the other end is connected to one terminal of the IC chip of the drive circuit,
An electroluminescent display panel characterized in that the other terminal of the IC chip can be connected to a cable for connecting to a control circuit.