JPH0136278Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention This invention relates to an improvement in the arrangement structure of electrode connection terminals of an electrode substrate used to construct a display panel such as a gas discharge panel or a liquid crystal display panel. It is.

(b) Prior art and problems AC or DC driven gas discharge panels, generally known as plasma display panels, include dot display matrix types and numeric display panels using special electrode patterns. panel, self-shift type panel, or surface discharge type panel with electrodes placed only on one substrate, etc.
Various types have been proposed. FIG. 1 shows an example of the configuration of a conventional matrix-type gas discharge panel.
A pair of electrode substrates 3 and 4 are arranged facing each other at a predetermined interval so that the X electrode group 1 and Y electrode group 2 are orthogonal to each other, and the periphery of the pair of electrode substrates 3 and 4 is surrounded by a low melting point. After sealing with glass 5, the inside of the gap space is once evacuated to a vacuum, and then an ionizable discharge gas is sealed inside. Then, for example, a large number of conductive wires are integrated in parallel with a resin coating material to connect a panel drive circuit to each connection terminal group 1a, 1b and 2a, 2b of both electrode groups 1 and 2 of the gas discharge panel. flat cable 6
Alternatively, a ribbon cable, a lead frame, etc. may be connected by soldering or the like, and a signal voltage may be selectively applied between the electrodes of both electrode groups 1 and 2 of the panel connected to the panel drive circuit by the flat cable 6. A pattern is displayed by applying a voltage to obtain a discharge spot at the opposing intersection of both electrodes.

By the way, in the case of the above-mentioned gas discharge panel, as the electrode arrangement structure becomes denser, each electrode connection for connecting the flat cable 6 to which the driving voltage is applied to both the electrode groups 1 and 2 becomes more difficult. Terminal group 1
The shape of each terminal pattern of a, 1b and 2a, 2b is also inevitably small, and the flat cable 6 connected by soldering etc. may be damaged along with the electrode connection terminal pattern due to impact during handling. If it peels off from the substrates 3 and 4, such inconveniences will occur. Therefore, in order to prevent such inconvenience, after connecting the flat cables 6 to the electrode connection terminal groups 1a, 1b and 2a, 2b by soldering or the like, the connection ends including the covered portions of the flat cables 6 are connected. A method of fixing the panel to the panel using an insulating adhesive has been used, but the problems will be pointed out below while explaining the connection process in more detail. First, the electrode connection terminal groups 1a, 1b and 2a,
A flat cable 6 is connected to each of the cables 2b by soldering or the like. The electrode connection pattern and flat cable are firmly connected by soldering, etc.
At the connection portion, the connection strength between the electrode connection pattern and the flat cable exceeds the connection strength between the board and the electrode connection pattern. Therefore, if an external force is applied to the flat cable, there is a high possibility that the electrode connection pattern itself will be peeled off from the board while being connected to the flat cable. By the way, in order to make such minute connections reliably and with high efficiency, it is essential to use a solvent such as flux in the soldering process. However, solvents such as flux left undisturbed after soldering may cause a chemical reaction with the electrode connection pattern. For this reason, the solvent must be removed after the soldering process is completed, and the usual method is to wash with a vigorous stream of water to remove the solvent. As a result of this cleaning, the external force that is unavoidably applied to the flat cable is transmitted as stress to the electrode connection pattern, which often causes each electrode connection pattern to peel off from the end one after another, and such a phenomenon cannot be repaired. However, there were very serious drawbacks that caused the gas discharge panels to be defective.

(c) Purpose of the invention In order to overcome the above-mentioned conventional drawbacks, the present invention aims to improve the adhesive strength of the connection terminals disposed on the outermost sides of each electrode connection terminal group on the electrode board to which the flat cable is connected to the board. It is an object of the present invention to provide a compact electrode substrate for a display panel, which has a structure in which the connected flat cable does not come off in subsequent steps and can improve handling properties.

(d) Structure of the device By increasing the contact area between the substrate and the electrode connection terminal pattern, the stress and force received from the flat cable connected to the electrode connection pattern can be dispersed, and the adhesive strength of the electrode connection terminal pattern to the substrate can be increased. is enhanced. In accordance with the operation of the invention, the object is to provide an electrode substrate having a plurality of electrodes arranged on the substrate, the electrodes being drawn out and arranged in parallel at the end of the substrate. Of the connection terminal group, the width of the connection terminal on the farthest side is wider than the width of the other connection terminals so that it is wider than the width of the conductor of the flat cable to be connected. This is achieved by providing an electrode substrate for a display panel characterized by the following features:

(e) Embodiments of the invention Preferred embodiments of the invention will be described in detail below with reference to the drawings.

FIG. 2 is a perspective view showing an example in which the present invention is applied to an electrode substrate for a matrix type display panel.

In the figure, 21 is a glass substrate which is the main part of the electrode substrate for a display panel, and a plurality of electrodes 22 covered with a dielectric layer 25 are disposed on the surface of the substrate 21. Reference numerals 23 and 24 denote a group of electrode connection terminals connected to the plurality of electrodes 22, and connection terminals 2 disposed on the outermost sides of the electrode connection terminal groups 23 and 24
3a, 23b and 24a, 24b, the area of each terminal pattern can be easily expanded in the direction of each side. and 24
Each of the terminals a and 24b is arranged in a terminal pattern having an area that is several times or more wide than the width of the other connection terminals. When increasing the area of the outermost terminal pattern, it is more effective for stress relief to extend it toward the outside of the terminal group beyond the connection position with the flat cable, as shown in the figure. Therefore, the electrode connection terminals 23a, 2 on the outermost sides
3b, 24a, 24b to the glass substrate 21 increases, a gas discharge panel is formed using an electrode substrate having electrode connection terminal groups 23, 24 having such a configuration, and each of the electrode connection terminals of the panel For example, if a resin-coated flat cable is connected to the groups 23 and 24 in parallel with a large number of conductive wires (not shown) by soldering or the like, as in the conventional case.
The terminals to which the conducting wires at both ends are connected are wider and more firmly connected than the conducting wires, which eliminates the problem of the conventionally connected flat cable coming off from the electrode connecting terminal group 23, 24 during handling, and the gas discharge panel This will prevent damage to the product or make it defective.

In the above-mentioned embodiment, an example was explained in which the electrode substrate used in a matrix type gas discharge panel was used. However, the present invention is not limited to this, and for example, it is possible to use a special electrode pattern various gas discharge panels that connect various types of flat multiconductor cables such as character, number, and symbol display panels, self-shift display panels, and flat cables for surface discharge type display panels, as well as liquid crystal displays,
Needless to say, it can also be applied to electrode substrates such as EL display panels. Furthermore, when the electrode terminal groups are divided into a plurality of groups to correspond to connectors, the present invention can be applied to each of the plurality of terminal groups in such a manner that the width of the terminals on both sides is widened.

(f) Effect of the invention As is clear from the above explanation, according to the structure of the electrode substrate for a display panel according to the invention, only the pattern area of the electrode connection terminals on the outermost sides of the substrate, which are easily damaged by peeling, is expanded. This has the advantage of eliminating the possibility that the flat cables connected to these electrode connection terminal groups come off from their outermost sides during handling, damaging the electrode substrate or display panel and causing defects. . Therefore, it is extremely advantageous to apply it to the electrode substrates of various gas discharge panels to which flat cables etc. are connected by soldering, or to the electrode substrates of other flat display panels, and has excellent practical effects. Demonstrate. In addition, among the electrode connection terminal patterns, the terminals that are widened to increase the connection strength are limited to the two terminals on the outermost sides. For this reason, there is an effect that a large area is not required for the electrode connection terminal pattern, and a compact design becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a perspective view for explaining a conventional gas discharge panel and its electrode substrate, and FIG. 2 is a perspective view showing an example in which the present invention is applied to an electrode substrate for a matrix type display panel. In the figure, 21 is a glass substrate, 22 is a plurality of electrodes, 23 and 24 are a group of electrode connection terminals, 23a, 2
3b, 24a, 24b are the outermost side electrode connection terminals, 2
5 indicates a dielectric layer.

Claims (1)

[Scope of utility model registration request] In an electrode substrate in which a plurality of electrodes are disposed on a substrate, the terminal width of the connecting terminals on the outermost side of the group of connecting terminals of the electrodes led out in parallel at the edge of the substrate is determined by the width of the connecting terminal to be connected. 1. An electrode substrate for a display panel, characterized in that the electrode substrate is disposed wider outside a group of terminals than other connection terminals so that the width is wider than the width of a conductor of a lead cable.