JP2001013892A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a display device which facilitates a short-circuit test of driving electrodes. SOLUTION: In this display device, in the electrodes for driving display elements sandwiched between two substrates opposed to each other, a substrate 1 is provided with a signal electrode group, and another substrate 2 is provided with a scanning electrode group, and these groups are arranged so that the groups cross each other, and the terminals 31a-31e connected with the signal electrode group on the substrate 1 form the central terminal group, and the scanning electrodes on the substrate 2 are divided into two groups 42a-42e, 52a-52e, and are connected with the divided terminal groups 41a-41e and 52a-52e located on both the sides of the central terminal group. In this case, one 52a of the two electrodes adjacent to the electrode groups divided above has connection terminals 51a, 51t, which are on both sides of the central terminal group and arranged as one of each terminal group divided above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring pattern which facilitates a short-circuit test of a drive electrode in a flat display device.

[0002]

2. Description of the Related Art As represented by televisions and personal computers, there is a strong demand for compact and space-saving display devices. A plasma display device or a liquid crystal display device is used as a means for achieving these. In these flat display devices, a display element is sandwiched between two substrates, one substrate is provided with a plurality of signal electrodes, and the other substrate is provided with two types of driving electrodes provided with a plurality of scanning electrodes. Are arranged so as to intersect with each other, a display signal and a scanning signal are applied, and a dynamic driving method of driving a display element by a temporal signal difference is adopted.

FIGS. 7 and 8 are schematic structural diagrams including wiring patterns when such a dynamic drive system is employed in a display device. FIG. 7 is a perspective view, and FIG.
It is A sectional drawing. In the figure, 1 is a lower substrate, and 2 is a transparent upper substrate opposed thereto. Upper substrate 2 between both substrates 1 and 2
Is sealed by a ring-shaped sealing portion 60 along the outer periphery of the liquid crystal display portion, and a liquid crystal display portion is formed inside the sealing portion. 3 for lower substrate 1
The signal electrodes 2a to 32e are arranged on the upper substrate 2 and the scanning electrodes are divided into two electrode groups 42a to 42e and 52a to 52e. The electrode patterns are disposed on the opposing surfaces of the upper and lower substrates, that is, on the lower substrate 1 on the upper side and on the upper substrate 2 on the lower side. The electrode lines are shown in a transparent state so that the relationship between the patterns of the upper and lower substrates can be easily understood. The actual electrode is extremely thin because an extremely thin transparent electrode is used, but the thickness of the cross-sectional electrode is extremely thick for ease of explanation. Further, the pattern of the drive electrode portion also has a required width, which is indicated by a line for easy explanation. A signal voltage is applied to the signal electrode at a time difference, and a scanning voltage is applied to the scanning electrode at a time difference. Intersections of the signal electrodes serve as pixels. Here, an example of 8 × 8 = 64 pixels is shown, but the number of scanning electrode lines and the number of scanning electrodes can be arbitrarily selected.

The lower substrate 1 is provided with a connection terminal for the drive electrode to obtain a drive signal from the outside, and is electrically connected one-to-one with the signal electrode and all of the scan electrodes. The connection terminals 31a to 31e corresponding to the signal electrodes 32a to 32e on the lower substrate 1 are grouped and located at the center of the substrate. This terminal group is called a center terminal group. The connection terminals are often arranged at the same pitch.

On the other hand, two scanning electrode electrode groups 42a to 42e and 52a to 52e on the upper substrate 2 are connected to two divided terminal groups 41a to 41e and 51a to 51e on the left and right sides of the central terminal group. I have. The connection terminals of the divided terminal group are often arranged at the same pitch as the central terminal group. In a flat display device that is dynamically driven, it is necessary to divide the electrode of one substrate into left and right and connect with the outside,
Since the intersection of the scan electrode group and the signal electrode group, which are actual display pixels, is easily located at the center of the display device, a compact and easy-to-view display device is provided.

The electrodes provided on the upper substrate 2 and the lower substrate 1
The connection with the connection terminal is made by conductive particles mixed in the seal portion. The connection terminals of the divided connection terminal group form a pattern of the same shape as the scanning electrode pattern in the sealing portion, and maintain insulation from adjacent electrodes by fine conductive particles mixed in a sealing agent mainly composed of an insulating substance While conducting up and down, electrical connection is ensured. 61a, 61
b is a dummy terminal that protects the connection terminal and is electrically connected, or is not electrically connected.

[0007]

In order to perform display more easily, a high-density display pixel is required. That is, in a display device that performs dynamic driving, both the signal electrode and the scanning electrode must be patterned (arranged) at a high density. As a result, the gap between the adjacent electrodes becomes small, and the risk of a short circuit is likely to occur. In order to prevent such a defective product from being mixed into a product, it is necessary to perform a short-circuit test in the manufacturing process to eliminate the defective product.

In the short-circuit test, a prober for inspection is applied to the connection terminal, adjacent electrodes are selected one after another, and the presence or absence of a short circuit therebetween is inspected. 1, the inspection between the signal electrodes 32a and 32b of the lower substrate 1 selects the connection terminals 31a and 31b of the central terminal group.
An inspection prober is applied to the inspection. Next, the inspection between the signal electrodes 32b and 32c is performed on the connection terminals 31b and 31c.
Perform by selecting c. In the same manner, in the inspection of the electrodes 32c to 32e, the adjacent connection terminals 31c to 31e are sequentially selected two by two in the same manner, and finally the connection terminal 31e and the connection terminal in front thereof are selected to short-circuit the electrodes on the lower substrate 1. The test ends. In the case of the lower substrate, the arrangement order of the electrodes and the connection terminals is the same. Therefore, if the connection terminals are arranged at equal intervals, the prober intervals are fixed, and the inspection is performed while moving sequentially to the left from 31a. Inspection is possible easily.

The scanning electrodes 42a to 42e, 52 of the upper substrate 2
Inspections a to 52e must be performed by selecting two connection terminals to be connected to the electrodes adjacent to each other, but the scanning electrodes are divided into two, and the connection terminals are separated by the center terminal group. Since they are connected to a group, they cannot be inspected in the same way as the lower substrate. That is, the scanning electrode groups 42a to 42e
The connection of the connection terminals 41a to 41e is the same in this range because the arrangement of the electrodes and the arrangement of the connection terminals are the same. Therefore, the prober for inspection performs the inspection by selecting the connection terminals 41a and 41b. , 41b and the next connection terminal are selected two by two. Finally, the connection terminal 41a and the connection terminal before it are inspected, and the process is finished. The order of the inspection is the same whether the inspection is performed sequentially from 41a to 41e or vice versa. The short-circuit test of the other two electrode groups 52a to 52e is also performed by the other divided terminal groups 51a to 51e connected thereto.
Use the connection terminals of The arrangement direction of the connection terminals of the divided terminal groups 51a to 51e is opposite to the left and right direction of the connection terminal groups of the connection terminals 41a to 41e. 5
The inspection can be performed by sequentially selecting two pairs on the left side toward 1e. In this way, the electrodes in each of the divided groups are mutually inspected, but the test between adjacent electrodes between the divided electrode groups cannot be performed. That is, a short circuit test between the electrodes 42e and 52e has not been performed. In order to do this, the connection terminals 41e and 51a in another divided terminal group must be selected, and a prober for inspection must be brought into contact therewith. As is clear from the figure, since this selection must be made across the central terminal group, a prober with an extremely large pitch must be used as compared with the inspection of other electrodes, and the prober for inspection is the same. A prober different in size from a prober that measures between adjacent electrodes in an electrode group is required, and at least two types of probers are required. This complicates the work procedure and the prober management, and further increases the prober cost. The solution of these problems has been an issue.

In another inspection method, a prober is performed with multiple pins in units of divided terminals (four in the case of FIG. 1), and inspection is performed while electrical scanning is performed. Only the inspection can be performed. In order to make this possible, a large multi-pin prober that straddles the central terminal group was required, and there was a problem that standardization of the jig was difficult.

An object of the present invention is to provide a display device which facilitates a short-circuit test of a drive electrode.

[0012]

In order to solve the above-mentioned problems, according to the present invention, an electrode for driving a display element sandwiched between two opposing substrates has a signal electrode group disposed on one substrate and the other electrode disposed on the other substrate. A scanning electrode group is provided on a substrate, and the signal electrodes and the scanning electrodes are arranged in a matrix so as to intersect each other, and each electrode of each substrate is connected to a connection terminal to which a drive signal is applied, and the scanning electrode In a display device having a plurality of electrode groups, a part of which has a wiring that is pulled out substantially to the right and is connected to the connection terminal and a wiring that is drawn out substantially to the left and connected to the connection terminal, A part of at least one electrode of two electrodes of an adjacent electrode group where the electrode groups are adjacent to each other is drawn out substantially in both right and left directions, and further connected to the connection terminal group connected to the electrode group Connection terminal or near Characterized in that it has a test terminal and 査端Ko or connection terminals.

Further, the pitch of the connection terminal group of the scanning electrode and the pitch of the connection terminal group of the signal electrode group are substantially the same.

The pitch of the scanning electrode connection terminal group, the pitch of the signal electrode group connection terminal group, and the connection terminal connection terminal, inspection terminal or connection terminal drawn out in both the left and right directions and connected to the electrodes. The pitch of the inspection terminals is substantially the same.

Further, the electrodes for driving the display element sandwiched between the two opposing substrates include a signal electrode group disposed on one substrate and a scanning electrode group disposed on the other substrate. Are arranged in a matrix so as to cross each other, each electrode of each of the substrates is connected to a connection terminal to which a drive signal is applied, and the connection terminals connected to the electrodes of one of the substrates are adjacent to each other. The electrode that forms the central terminal group and is disposed on the other substrate is divided into two or more, and the connection terminals connected to the two or more divided electrodes are divided terminal groups corresponding to the divided electrodes. The divided terminal group has an electrode pattern located on both sides of the central terminal group, and at least one electrode of two adjacent electrodes of the divided electrode group is at both ends. Connection terminal The connection terminals and is characterized by being arranged on either side of the central terminal group as one of the split terminal group respectively said.

Further, the pitch of the divided connection terminal groups is the same as each other.

Further, the pitch of the divided connection terminal group and the pitch of the center terminal group are the same.

Further, one of the connection terminals of the electrode having connection terminals at both ends has only an inspection region and does not have an external connection region for display driving.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on examples with reference to the drawings. FIG. 1 shows a first embodiment of the invention.
FIG. 5 is a plan view transparently showing a wiring pattern of a liquid crystal display device in which external connection terminals are provided on one substrate in the embodiment. The schematic structure and cross section of the liquid crystal display device are the same as those shown in FIGS. 7 and 8 used for the description of the prior art, and the same components are denoted by the same reference numerals. That is, the scanning electrode group 4 is provided on the upper substrate.
2a-42e and 52a-52e, signal electrode groups 32a-32e are laid on the lower substrate on surfaces facing each other, and central terminal groups 31a-32e are connected to the signal electrode groups 32a-32e.
31e and two divided connection terminal groups 41a to 41e, 51 connected to the scan electrode groups 42a to 42e, 52a to 52e.
a to 51e and dummy terminals 61a and 61b for protecting the connection terminal group are arranged on the lower substrate. In FIG. 3, the electrode 52e is further extended as shown by a dotted line and connected to the external connection terminal 51t on the lower substrate, which is a key point of the present invention. The main purpose of the external connection terminal 51t is to provide an inspection, but since it is electrically equivalent to the terminal 51a, a driving signal can be provided using this terminal. The extension of the electrode is shown by a dotted line, but this is for explanation, and the electrode pattern is integral. In order to arrange the connection terminal group symmetrically, a dummy terminal 61c is provided on the lower substrate.

As described above, since the external connection terminal 51t can be arranged next to the connection terminal 41e, the electrodes adjacent to the divided electrode group, ie, the electrodes 42e and 52a
Short-circuit test was possible with adjacent terminals. If one terminal group is formed by adding 51t to the connection terminals 41a to 41e, the inspection between the divided electrode groups can be easily performed by selecting and inspecting the terminals 41e and 51t following the 41a to 41e. This eliminates the need for special jigs such as a large pitch prober that straddles the central terminal group. If the pitches of the divided terminal groups including the external terminals 51t are arranged at equal intervals, the prober pitch may be a fixed pitch, the inspection jig becomes simpler, and reliable inspection can be performed.

In FIG. 1, the case where the inspection is performed using an assembly in which the lower substrate and the upper substrate are integrated has been described. However, in actual liquid crystal manufacturing, the upper and lower substrates are often inspected as separate units. is there. This is because if the inspection of each of the substrates is completed, defective products in the assembled product are eliminated with a high probability. Next, an embodiment in that case will be described with reference to FIGS.

FIG. 2 shows another embodiment in which the portion B of FIG. 1 is enlarged. The pattern of the lower substrate is indicated by a dotted line, and the pattern of the upper substrate is indicated by a solid line. 41a1 to 41e1 and 51t1 are connection terminals on the upper substrate of the electrodes 42a to 42e and 52a, and the connection terminals 41a to 41e of the lower substrate when integrated with the lower substrate.
And an inspection of the upper substrate alone. The reason why the lower substrate 61d is not arranged to overlap the 51t1 will be described later. Although not shown, the connection terminals of the electrodes 52a to 52e on the upper substrate are arranged at positions to connect to the connection terminals (51a to 51e in FIG. 1) of the lower substrate. When testing the upper substrate alone, if the connection terminals of the upper substrate are used instead of the external terminals described with reference to FIG. 1, there are terminals 41e1 and 51t1 between the electrodes 42e and 52a. The inspection can be performed without using a special prober, and the inspection jig can be simplified.
Since the lower substrate is the same as that shown in FIG. 1, the inspection of the lower substrate may be performed between the connection terminals 31a to 31e in the conventional manner.

In FIG. 2, 61d is a dummy terminal,
The connection terminal 51t1 on the upper substrate is not electrically connected. This is because the test for the upper substrate alone has been completed and the signal for driving the display is controlled by the connection terminal 51a shown in FIG. In this way, by disconnecting the connection terminals provided for inspection, external disturbances such as static electricity can be prevented from entering the panel, and at the same time, external terminals can be connected to the connection terminals by using the terminals on the lower substrate as dummy terminals. When the input flexible substrate (FPC) is attached with an anisotropic conductive adhesive, protection such as prevention of peeling of the adhesive outside the connection terminal can be performed. Also, the dummy terminal 61 of FIG.
Since a pattern can be formed in c and the target shape, a display device having the same shape as the conventional one can be provided, and there is an advantage that compatibility with the conventional one can be maintained.

Further, when the inspection is performed in this manner, the location where the prober comes in contact with the inspection is different from the location of the external connection for actually driving the display, and the inspection is affected by the inspection mark due to the contact of the prober during the inspection. Since the display device can be connected to an external device without the need, the quality of the display device is more stable. The same can be applied to the lower substrate, so that another embodiment will be described with reference to FIG.

Since the display by the dynamic drive performs the display operation depending on the difference in the state at the intersection of the upper and lower electrodes as called the matrix drive, the signal electrode and the scan electrode may be arranged on either the upper or lower substrate. Also, the connection of any electrode to the connection terminal group can be selected from either the center terminal group or the divided terminal group. FIG. 3 shows an embodiment in which a scanning electrode group is assumed on the lower substrate and is used as a divided electrode group. 41a to 41e are connection terminals,
The electrodes 42a to 42e and 52t and the inspection terminal 51t1 of FIG.
The electrodes 42a2 to 42e2, 52t2 and the inspection terminals 51a2 corresponding to are arranged on one lower substrate as indicated by the dotted lines. Here, the inspection area where the inspection probe is brought into contact is 2
The portion C indicated by the dashed line and the external connection region are the portion D indicated by the two-dot chain line. In this case, connection terminals 41a to 41
Using the inspection area e and the inspection terminal 51t2, the test of the substrate alone can be performed with the prober pitch fixed. The two-dot chain line E indicates the edge of the upper substrate.

Although the above embodiment has shown an example in which the scanning electrode is divided into two and divided into two connection end groups, the present invention can be applied to any number of divisions. This is described in the embodiment of FIG. FIG. 4 is a perspective plan view when the electrode group is divided into four groups. 1 have the same contents. That is, 32a to 32e are signal electrode groups on the lower substrate, 42a to 42e are first scan electrode groups on the upper substrate,
2a to 52e are a second scanning electrode group, 31a to 31e are central terminal groups, 41a to 41e, 51a to 51e are divided terminal groups, and 51t is a connection terminal additionally provided to the second divided terminal group, 61a, 61b and 61c are dummy terminals. In addition to this, the third scan electrode groups 72a to 72
e, fourth scanning electrode groups 82a to 82e are provided. The lower substrate has a connection terminal group 71 corresponding to the third electrode group.
a to 71e are arranged, and one connection terminal 81t of the two terminals connected to the electrode 82a is arranged beside the connection terminal groups 71a to 71e. On the other hand, connection terminals 81a to 81e corresponding to the fourth electrode groups 82a to 82e are provided, and one connection terminal 71t of the two terminals connected to the electrode 72a is located on the side of the connection terminals 81a to 81e. It is arranged and arranged alongside this terminal group.

As described above, the scanning electrode 72a is connected to the terminal 71a.
The scanning electrode 82a has two terminals 81a and 81t, and the scanning electrodes 82a have two terminals 51e and 71t.
In the short-circuit test of a, the terminals 51e and 71t are connected to the electrode 72e.
And 82a can be performed by selecting adjacent terminals of the "connection" terminals 71e and 81t, so that inspection can be performed without applying a prober to terminals connected across the central terminal group. Also in the present embodiment, the effect described with reference to FIGS. 2 and 3 can be obtained by using 81t as a dummy terminal.

In the above description, the electrodes of the upper substrate are connected to the lower substrate in the display device, and the terminal connection for driving is performed by the lower substrate. It may be performed directly from the upper substrate. The embodiment will be described with reference to FIGS.

FIG. 5 is a perspective plan view, and FIG. 6 is an FF of FIG.
It is a simplified sectional view. The lower substrate 1 has signal electrodes 32a-3
2e is connected to the center terminal groups 31a to 31e, and the connection terminal group is protected by the dummy terminals 61a and 61b. The external connection for driving includes terminals 31a to 3a in FIG.
1e. For this connection, an anisotropic conductive adhesive in which conductive particles and insulating particles are mixed in an adhesive resin such as epoxy is used, and the connection is performed by thermocompression bonding. The scanning electrodes on the upper substrate are composed of two groups of 42a to 42e and 51a to 52e, and the first divided terminal groups 41a2 to 41e2 respectively.
41e2 and the second divided terminal groups 52a2 to 52e2. Further, the electrodes 42e and 52a have two connection terminals, and each of the electrodes 42e and 52a has four terminals in the opposite terminal group.
It is connected to 1t2 and 51t2. External connection for driving is performed from the lower surface of FIG. Reference numeral 150 in FIG. 7 simply shows the pattern position on the lower surface. Reference numeral 60 denotes a sealing portion. In this case, electrical connection between the upper and lower substrates is unnecessary.

When performing a short-circuit test of the electrodes of the upper substrate 2,
If the connection terminals 51t2 or 41t2 are not prepared, the test between the electrodes 42e and 52a is performed by the connection terminals 41e and 51a.
In this case, only at this time, the inspection prober must use the one that straddles the lower substrate. In the case of this embodiment “form”, 41e2 and 51t2 or 51a
2 and 41t2 can be performed at adjacent terminals.
Reliable inspection can be performed with a simple inspection jig. In the present embodiment, two electrodes having two connection terminals are described, but any one of 41t2 and 51t2 may be used.

[0031]

According to the present invention, as described above, even in a display device in which a matrix-driven electrode group is divided and divided to obtain an external drive signal, one of the electrodes adjacent to the divided group has terminals on both sides. Since the connection terminals that can always inspect the adjacent electrodes are prepared, the inspection of all the electrodes can be performed by repeating the selection of the adjacent connection terminals. As a result, there is no need to prepare an inspection prober having an extremely large span, and there is an effect that the inspection can be performed easily and reliably with a simple jig.

Conventionally, a prober for inspection needs a prober different in size from a prober that measures between adjacent electrodes in the same electrode group, and at least two types of probers are required. As a result, the work procedure and the management of the prober are complicated, and there is also a problem that the prober cost is increased. However, according to the present invention, only one type of prober is required, and the conventional problem can be solved. . Furthermore, by making the pitch of the connection terminal group the same, the contact span of the inspection prober can be fixed, so that the inspection jig becomes simpler and the standardization of the inspection jig becomes easier.

Further, by arranging one connection terminal of the electrode having connection terminals at both ends only in the inspection area, the quality of the completed display device is less likely to be affected by disturbances such as adverse effects of external static electricity in the completed display device. At the same time, it is possible to provide products that are compatible with conventional products.

[Brief description of the drawings]

FIG. 1 is a perspective plan view showing a wiring pattern of a liquid crystal panel in which an external connection terminal is provided on one substrate according to a first embodiment of the present invention.

FIG. 2 is a partial view showing another embodiment in which a portion B in FIG. 1 is enlarged, and is a partial plan view showing a pattern when a divided electrode group is arranged on an upper substrate.

FIG. 3 is a partial view showing another embodiment in which a portion B in FIG. 1 is enlarged, and is a partial plan view showing a pattern when a divided electrode group is arranged on a lower substrate.

FIG. 4 is a perspective plan view showing a wiring pattern when a group of divided electrodes is increased in another embodiment of the present invention.

FIG. 5 is a perspective plan view showing a wiring pattern of a liquid crystal panel in which connection terminals for obtaining drive signals are provided on each of two substrates according to still another embodiment of the present invention.

FIG. 6 is a sectional view taken along line FF of FIG. 5;

FIG. 7 is a perspective view of a liquid crystal panel, which is an example of a display “liquid crystal” device showing the prior art “related to the present invention”, as viewed obliquely from above.

FIG. 8 is a cross-sectional view taken along line AA of the liquid crystal panel shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower board | substrate 2 Upper board | substrate 31a-31e Central terminal group (connection terminal) 32a-32e Signal electrode group (signal electrode) 41a-41e Scanning electrode terminal group (divided connection terminal group) 41a1-41e1 Connection terminal part (terminal of upper board) 41a2 to 41e2 First divided terminal group (terminal) 41t, 41t2, 51t, 51t1, 51t2, 71
t, 81t Inspection terminals 42a-42e Scan electrode group (scan electrode) 42a2-42e2 Electrode group (electrode) corresponding to scan electrode group 51a-51e Scan electrode terminal group (split connection terminal group) 52a-52e Scan electrode group (scan) Electrodes) 52a2-52e2 Second divided terminal group (terminal) 61, 61a-61h Dummy terminal 71a-71e Connection terminal group 72a-72e Third scan electrode group 81a-81e Connection terminal group 82a-82e Fourth scan electrode Group (scanning electrode) C Inspection area D External connection area

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G014 AA03 AB20 AB21 2H092 GA32 NA30 5C040 GK05 5C094 AA42 AA43 AA48 BA31 BA43 CA19 DB01 DB03 DB04 DB10 EA03 EA05 EB03 FA01 FB12 GB10 5G435 AA17 BB06 BB12 CC09 EE12

Claims (7)

[Claims] An electrode for driving a display element sandwiched between two opposing substrates has a signal electrode group disposed on one substrate and a scanning electrode group disposed on the other substrate. Are arranged in a matrix so as to cross each other, each electrode of each of the substrates is connected to a connection terminal to which a drive signal is applied, and a part of the scanning electrode is pulled out substantially to the right and connected to the connection terminal. In a display device having a plurality of electrode groups by having a wiring and a wiring which is pulled out substantially to the left and connected to a connection terminal, in the display device having a plurality of electrode groups, two of the adjacent electrode groups where the electrode groups are adjacent to each other A portion of at least one of the electrodes is drawn out substantially in both left and right directions, and further has a connection terminal or an inspection terminal or a connection terminal and an inspection terminal near the connection terminal group connected to the electrode group. Characterized by Display device. 2. The display device according to claim 1, wherein a pitch of the connection terminal group of the scanning electrode is substantially equal to a pitch of the connection terminal group of the signal electrode group. 3. The connection terminal connection terminal, the inspection terminal or the connection terminal which is drawn out in both the left and right directions and connected to the electrode, wherein the connection terminal group of the scanning electrode and the connection terminal group of the signal electrode group have a pitch. 3. The display device according to claim 1, wherein the pitch of the inspection terminals is substantially the same. 4. An electrode for driving a display element sandwiched between two opposing substrates, wherein a signal electrode group is disposed on one substrate, and a scanning electrode group is disposed on the other substrate. Are arranged in a matrix so as to cross each other, each electrode of each of the substrates is connected to a connection terminal to which a drive signal is applied, and the connection terminals connected to the electrodes of one of the substrates are adjacent to each other. The electrode that forms the central terminal group and is disposed on the other substrate is divided into two or more, and the connection terminals connected to the two or more divided electrodes are divided terminal groups corresponding to the divided electrodes. The divided terminal group has an electrode pattern located on both sides of the central terminal group, and at least one electrode of two adjacent electrodes of the divided electrode group is at both ends. Having a connection terminal The display device, wherein the connection terminals are disposed on both sides of the central terminal group and are arranged as one of the divided terminal groups. 5. The display device according to claim 4, wherein the pitches of the divided connection terminal groups are the same. 6. The display device according to claim 4, wherein a pitch of the divided connection terminal group and a pitch of the center terminal group are the same. 7. The connection terminal according to claim 4, wherein one of the connection terminals of the electrode having connection terminals at both ends has only an inspection region and does not have an external connection region for display driving. 7. The display device according to 6.