JP3244575B2 - Display element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, about the display element driving element is connected to the electrode terminal portions.

[0002]

2. Description of the Related Art A dot matrix type display element has a first electrode-attached substrate having display electrodes patterned in a stripe shape, and a stripe-shaped display electrode in a direction different from the direction of the stripes of the display electrodes of the first electrode-attached substrate. using a second substrate with electrodes having a patterned display electrode, sealed at their periphery form cells by, sandwiching the electro-optic medium in their interior, the display at the intersection of two display electrodes Is going. As a typical display element, there is a liquid crystal display element, in which liquid crystal is sandwiched between two substrates.

[0003] In recent years, this liquid crystal display element has been particularly developed to have a high definition and a high contrast ratio. For example, many displays such as 640 x 400 dots are performed . 1/200
In the case of duty drive, drive on the upper screen and lower screen.
A two-screen drive that separates motion is used, and the upper and lower segment sides
A total of 1280 terminals are required in the terminal area,
In the case of 0 duty drive, one screen drive is used,
640 terminals on one side are required. Further, when colorization is performed, each pixel is tripled.
Zero terminals are required. On the other hand, a reduction in size and weight is also required, and a drive circuit is being formed from a TCP (tape carrier package, also conventionally referred to as TAB) or a semiconductor chip.

When a normal IC (interconnector) is used, the display electrode is extended to the terminal as it is, and the connection lead is patterned in a rectangular pattern having the same width as the display electrode and including the terminal. In such a case,
The connection lead has the lowest resistance value without any special consideration, and the resistance value of each connection lead is substantially equal.

On the other hand, when TCP is used for compact mounting, the pitch of TCP terminals is becoming finer as the number of TCP terminals increases. For example, 6
For 40 of these pins, the pitch of the pattern of the display electrodes for normal display is about 250～330Myuemu. In contrast, the terminal pitch of TCP is about 100 to 200 μm ,
It has a narrower pitch. Further, it is expected that the number of drive terminals in one TCP increases, and the pitch becomes finer.

[0006] In any case, a large difference occurs in the width of the display element the terminal group of the terminal group of TCP. For example, 16
0 terminal pitch of TCP in TC P output is 200 [mu] m, the terminal pitch of the display element is a 330 [mu] m. In this case, T
C P terminal group a width of about 32mm, the terminal group width of the display element is about 53mm, and when placed approximately in the middle of the terminal group of the display elements connecting the TCP, displacement in the both outer side about 10mm
Becomes As described above, when the terminal pitch is about 200 μm, the line width of the connection lead can be about one hundred and several tens of μm, so that there is not much difference in lead resistance.

[0007] Therefore, it is wired or <br/> or shortest distance in which the connecting leads to the line width constant, does not cause few problems. However, when the load is heavy and the difference in resistance affects the display quality, or when the terminal pitch on the TCP side becomes narrower, there is a problem that the display quality is reduced by such simple wiring. Was.

[0008] Therefore, to adjust the line width of the connection lead to the length of the connecting leads, there is a method that the resistance constant. This method makes it easy to match the resistance of the connection leads
However, since the design must be performed to change the line width for each terminal, the design is troublesome. For this reason, when there are many types, it takes a lot of time to design a plate for electrode patterning, resulting in poor productivity.

As a method of further reducing the design work, the shape of the connection lead is changed, and in the case of a short connection lead, the connection lead is bent in the shape of a "-" to form a connection lead.
There is also a method in which the resistance value is almost matched by increasing the length of the resistor. However, the connection re <br/> over de low minimum of the original in this case the resistance to long bent, will be unreasonable design for arrangement of the connection leads, the resistance value is unnecessarily or higher, disconnection of a short circuit or connection lead between the connection lead
There has been a kuna Ru issues that ease occur.

[0010]

[Problems that the Invention is to Solve When such a connection the driving element such as TCP, easy and wiring method capable too excessive name has wiring design of the connecting lead has been desired. That may not be designed to calculate the line width of one single connection leads, and connecting lead has been desired wiring, such as not too complicated shape.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an electro-optical medium is enclosed therein, and a driving element is drawn out from a display electrode at a terminal portion.
In the display element driving element terminals connected is al provided, is connected Lee <br/> de connecting the display electrode and the driving element terminals, are formed in a linear shape at both the outer and the shortest portion
With the shortest connection lead end on the display electrode side and both outer sides
The drive than connecting the driving element terminal end of the connection lead wire <br/> dynamic element terminal side, is the shortest connection leads and parallel to and read the same line width, the display electrode than the line connecting By the side
A display element, which is arranged in parallel with each outer connection lead and is wired with a line width selected so that the resistance value of the shortest connection lead is substantially equal to the resistance value of the other connection lead. Is provided.

Further, the length L ₃₁ of the shortest connecting leads, line width d
And _31, and the length L ₃₂ of the outer connecting leads, the relationship between the line width d ₃₂ and _{L 31 / d 31 = L 32} / d 32, the shortest connection leads and the outer contact
Connection lead between the connection leads so that the line width d ₃₁ at parallel portions to the shortest connection leads, above the display device in the portion parallel to the outer connecting leads are such that the line width d ₃₂ and, , liquid crystal is sealed between substrates with a transparent electrode of a pair,
On the driving element is connected to the transparent electrodes of the terminal portion
The present invention also provides the above-described display element, wherein the display element and the driving element are TCP .

[0013] Display device of the present invention, a liquid crystal therein, the electro-optic medium of the electrochromic material or the like is sealed, a large number of electrodes are led out to the terminal unit, the drive element is connected to the electrodes of the terminal portion Applied to display elements. As a typical example, there is a liquid crystal display element using a transparent electrode-attached substrate having display electrodes patterned in two stripes.

[0014] electrodes of the electrode with the substrate, In ₂ O ₃ -Sn
Transparent electrodes such as O ₂ (ITO) and SnO ₂ can be used. ,
This is the electrode substrate with electrodes chromium, non-transparent electrode and the like aluminum, a conductive film of an organic compound can also be used. However, since the normal resistance low when using only metal wirings, unevenness due to the difference in resistance to a thin wire is almost the Most seem. For this reason, the present invention is suitable for the case where the wiring is performed by the transparent electrode.

As the substrate, a known substrate such as glass or plastic is used. Electrode may be provided directly on the _{substrate, SiO 2, TiO 2, ZrO} 2 or the like of the inorganic film and a color filter, polyimide, polyamide, polyurea <br/> Tan, organic films such as silicone over emissions It may be provided via.

Hereinafter, a liquid crystal display device using a substrate with a transparent electrode having display electrodes patterned in two stripes will be described as a representative example. In this case, the two substrates with transparent electrodes are arranged to face each other such that the directions of the respective stripes cross each other, and are sealed at the periphery to form cells. Liquid crystal is sealed in the inside.

The directions of the stripes of the two substrates with a transparent electrode may be usually arranged so as to intersect at right angles. For example, if 640 segment electrodes and 400 common electrodes are used, it is possible to display 256,000 pixels, which are the intersections between them. Note that, in exceptional cases, the directions of the stripes of the two electrodes may intersect at 60 °, 45 °, or any direction other than orthogonal.

[0018] When the liquid crystal display device, the surface on the side in contact with the liquid crystal of the transparent electrode Tsukemoto plates, usually polyimide, polyamide, organic film or SiO ₂ such as silicone over emissions, TiO _2, ZrO
An inorganic film such as ₂ is formed, and the surface is rubbed to form an alignment film. Note that the alignment film may be formed by oblique evaporation of an inorganic substance. In the case where an alignment film such as a guest-host mode or a polymer dispersed liquid crystal mode does not need to be formed, the alignment film may not be formed.

The present invention is particularly suitable for a liquid crystal display device of high definition display. Specifically, STN (super twisted tape
It is suitable for a liquid crystal display element which has a twist angle of 180 to 360 ° and which performs display using elliptically polarized light, which is called a liquid crystal display element. And
It is suitable for a terminal having a narrow pitch of TCP terminals or semiconductor chip pads to be used.

In the present invention, the display electrode and the driving element are in contact with each other.
Referring to FIG. 1, a description will be given of a pattern of a connection lead for connecting an electrode to be connected . FIG. 1 is a plan view showing a connection lead near a terminal portion according to the present invention. In FIG. 1, reference numeral 1 denotes a display element terminal group , and 2 denotes a TCP terminal group (a terminal connected to the TCP).
) , 3 is a connection lead group connecting between both terminals, 4 is TCP,
Reference numeral 5 denotes the shortest connection lead having the shortest length in the connection lead group , and 6 denotes the longest connection lead which is the longest.

[0021] Incidentally, the phrase display device terminal, precisely the connection leads, becomes the terminal of the display device including TC P pin, tables for Ku convenience, ease understanding of the description in the present invention
Display electrodes that referred to as display device terminals drawn out portion from the display area. In the case of a normal liquid crystal display element, this means an end portion where the electrode near the seal is drawn out in parallel.

Reference numerals 7A, 7B, 7C, and 7D denote regions in which the wiring patterns of the connection leads are different from each other. The respective regions are the shortest connection lead 5 and the point on the display element terminal side of the shortest connection lead 5 and the outside of both sides . A range divided by a line connecting the points on the TCP terminal side of the connection lead (represented by a broken line in FIG. 1) is shown. In the present invention, specific wiring is performed in this area.

The shortest connection lead 5 in the present invention refers to a lead connecting the display element terminal and the TCP terminal and having the shortest length. As in the example of FIG. 1, the width of the TCP terminal group
If the display element terminals exist on both outer sides of the direction ,
Usually, there is a portion where the connection lead is almost vertical, and this is the shortest connection lead. The longest connection lead 6 is shown in FIG.
Of the left and right connection rie de which refers to connections Lee <br/> de in length becomes longest. TCP is connected exactly to the center of the display element terminal
If so is, since the symmetrical arrangement of the two outer contact
The length of the subsequent leads will be equal. In this case, either one may be the longest connection lead.

[0024] When as in the example of FIG. 4 only exists display element terminal at one outer side in the width direction of the T CP terminal group, both outside
One of the connection leads becomes the shortest connection lead 45,
The other outer connection lead becomes the longest connection lead 46.
Specifically, display element terminals that fall within the width of the TCP terminal group
4 of the group 41 and the left outside of the TCP terminal group 42 in FIG.
The connection lead connecting the sides becomes the shortest connection lead 45.

[0025] If more extreme, for example, seen in the example of FIG. 4, when the left outer display element terminal of the display element the terminal group 41 than the right outer side TCP terminal of TCP terminal group 42 is arranged such that the right side, Again the left outer TC of the TCP terminal group 42
The connection lead connecting the P terminal and the left outer display element terminal of the display element terminal group 41 is the shortest connection lead. Such an arrangement is generally not preferred because the resistance of the connection leads is increased.

Next, with reference to FIGS. 2 and 3, a method of designing a connection lead pattern and line width will be described. In FIG. 2, 31 is the shortest connection lead, 32 is the longest connection lead, 3
3A and 33B are examples of connection leads between them, and 34 is an opposite connection lead.
Shows the outer connection leads.

In FIG. 3, R ₃₁ is the shortest connection lead 31.
(Between the display element terminal 11 and the TCP terminal 21)
R ₃₂ is the longest connection lead 32 (display element terminal 12 and TCP
_R33A and _R33B are connected to the connection leads 33A and 33B (between the display element terminal 13 and the TCP terminal 2).
_R34 represents the resistance of the connection lead 34 (between the display element terminal 14 and the TCP terminal 24).

D ₃₁ and L ₃₁ are the line width and length of the shortest connection lead 31, respectively, L ₃₂ is the length of the longest connection lead 32, and L _33A is
Length of the connecting leads 33A, d _33B and L _33B are respectively connected Lee <br/> de 33B line width and length of the, d ₃₄ and L ₃₄ are each connection lead 3
4 represents the line width and length. In this figure, the line width d ₃₂ of the longest connection lead 32 and the line width d of the connection lead 33A are shown.
_33A is not shown because it complicates the figure, but will be used in the following description.

In the present invention, the resistance of these connection leads is adjusted to be substantially constant. In addition, since there are only a few types of connection lead wire widths and there is no complicated wiring, design is easy and there is little danger of short-circuit and disconnection.

The resistance R ₃₁ of the shortest connecting lead 31 is proportional to its length L _31, is inversely proportional to the line width d _31, the coefficient K
Then, it is expressed as the following equation (1). R ₃₁ = K · L ₃₁ / d ₃₁ (1) Similarly, the resistor R ₃₂ of the longest connection lead ₃₂ has a length L ₃₂
, And is inversely proportional to the line width d ₃₂ , so that if the coefficient is K, it is expressed by the following equation (2). _{R 32 = K · L 32 /} d 32 (2)

[0031] In the present invention, so as to equalize the this resistor R ₃₁ and R _32. In this case, in order to lower order and resistance which does not complicate the pattern of wiring, these two connection <br/> leads are linearly connecting the respective shortest distance. Therefore, the length L ₃₂ of the shortest connecting lead lengths L ₃₁ and outer connecting leads can not be changed, thus adjusting the resistance in the line width d ₃₁ and widths d _32. This is the resistor R ₃₁ and R ₃₂ is optimally exactly equal, if is difficult to equally complete design, but will produce a change in the connection lead resistance, if about 10% of the deviation It can be used without any problem.

That is, from the above equations (1) and (2),
Equation (3) is obtained. L ₃₁ / d ₃₁ = L ₃₂ / d ₃₂ (3) Here, since L ₃₁ <L ₃₂ , d ₃₁ <d ₃₂ . Specifically, d ₃₂ = d ₃₁ · L ₃₂ / L ₃₁ is satisfied and adjacent
D ₃₁ and d ₃₂ are determined so as to keep a gap that does not cause a short circuit with the connection lead.

The connection lead between the shortest connection lead 31 and the longest connection lead 32 is a line connecting the end of the shortest connection lead 31 on the display element terminal side and the end of the longest connection lead 32 on the TCP terminal side (FIG. 2). (Indicated by a broken line).

Below this dashed line, the connection leads are 33
As shown by A, wiring is performed in parallel with the shortest connection lead 31 and with the same line width. In other words, the connection lead 33A in this part, the line width d _33A (= d _31), are patterned by a length L _33A. The resistance R33A of this part is as follows (4)
It is expressed like a formula. _R33A = _KL33A / _d33A (4)

Above this dashed line, the connection lead is 33
As shown by B, wiring is performed in parallel with the longest connection lead 32 and with the same line width. That is, the connection leads 33B in this part, the line width d _33B (= d _32), are patterned by a length L _33B. The resistance R33B in this portion is expressed as in the following equation (5). _R33B = _KL33B / _d33B (5)

The combined resistance R ₃₃ of the connecting leads 33A, 33B becomes the sum of the resistance of both. _{R 33 = K · L 33A /} d 33A + K · L 33B / d 33B (6) At this time, since the like design above, for example L
_33A = When X · L ₃₁ and (where 0 ≦ X ≦ 1), L 33B =
The _{(1-X) · L 32} . Also, d _33A = d ₃₁ , d _33B =
Since d ₃₂ , the expression (6) is as follows. _{R 33 = K (X · L} 31 / d 31 + (1-X) · L 32 / d 32) (7)

From the above equation (3), L ₃₁ / d ₃₁ =
Since L ₃₂ / d ₃₂ , the above equation (7) becomes as follows. R ₃₃ = K · L ₃₁ / d ₃₁ (8) That is, all the connection leads between the shortest connection lead 31 and the longest connection lead 32 can have the same resistance as the shortest connection lead 31.

A similar design is applied to the left side of the shortest connection lead 31 .
Also carried out in connection lead. That performs a parallel and wired in the same line width as the shortest connection lead 31 in the region 7C of FIG. 1, and parallel and the wiring in the same line width as the left outer connecting leads 34 in the region 7D. Thereby, all the connection leads between the shortest connection lead 31 and the left end connection lead 34 can have the same resistance as the shortest connection lead 31.
Thereby, the resistance of all connection leads connected to this TCP can be made constant.

In this case, an example of designing one TCP has been described. When the arrangement is slightly shifted in each TCP, a connection lead having the highest resistance among them is determined, and the connection lead of the connection lead is determined. It intends row of the above design in a certain TCP.
The combined resistance at that time is R ₀ . Then another TC
When designing the connection lead of P, the resistance is set to R ₃₁ = R ₃₂ =
If it is designed to be R ₀ , the connection resistances of all TCPs can be matched.

[0040] By such a design, essentially requires a line width three connection leads, that direction also three directions (connecting leads in all connection leads straight 31,32,3
4 is only parallel), not easy and is very design. Also,
Since the pattern is simple, rather easy to understand is an abnormality of design errors and vans, it is less trouble on the production.

FIG. 4 is a diagram for explaining a design in a case where the display element terminal group and the TCP terminal group are arranged so as to be shifted from each other. For example in FIG. 4, the display device display device of the terminal group 41
Connection lead and the TCP pin of the TCP terminal group 42 are connected vertically have greens. In this case, the left outer connection re <br/> over de is the shortest connection lead 45, the right outer connecting leads is the longest connection lead 46. In this case, there are two regions having different design patterns.

The areas 47A and 47B are formed between the end of the shortest connection lead 45 on the display element terminal side and the T of the longest connection lead 46.
It is separated by a line connecting the ends on the CP terminal side (shown by a broken line in FIG. 4). In such a case, the line width of each connection lead is obtained from the shortest connection lead 45 and the longest connection lead 46 in the same manner as in the case of the above equation (3).

[0043] Then, all of the contact between the two outside of the connection lead
The continuation lead is located in the area 47 as indicated by 48A and 48B.
In A, the line width is parallel to the shortest connection lead 45 and has the same line width.
In the region 47B, it may be designed to be parallel to the longest connection lead 46 and to have the same line width.

In the case of a liquid crystal display device, the liquid crystal used is a nematic liquid crystal for a normal TN type liquid crystal display device or an STN type liquid crystal display device, various known liquid crystals for vertical alignment, liquid crystal for phase transition, ferroelectric. Liquid crystals, antiferroelectric liquid crystals, and liquid crystals to which dichroic dyes and other additives are added can also be used.

A polarizing plate, a retardation plate, a reflecting plate, a light source and the like are used in combination with the liquid crystal display device manufactured as described above, if necessary. Further, if necessary, a color filter, a light-shielding film, or the like may be formed inside or outside the substrate. In the case of a display element other than a liquid crystal display element, various members and components can be added and used as needed.

The driving element used in the present invention is most preferably TCP, but a chip may be used directly. The electrode at the portion where the driving element is disposed may be a transparent electrode only, or a metal thin film may be formed by plating or the like as necessary.

The connection between the drive element and the electrode can be easily conducted directly on the transparent electrode by using, for example, an anisotropic conductive film or an anisotropic conductive adhesive. Also,
By utilizing the contraction force of the photo-curable resin, the electrodes and the terminals (pads) can be pressure-bonded with only the non-conductive photo-curable adhesive to make conductive connection. Various known methods can be used for the conductive connection in the present invention.

[0048]

EXAMPLE 1 I was placed on a soda glass substrate undercoated with SiO _2.
TO forming a transparent electrode made of (about 10 [Omega / □), a 640 stripes with a pitch 0.30 mm (same for the display device pin) in the display area, pitch TCP pin 0.22
mm was formed as a segment-side electrode .

The TCP has 80 terminals, and the upper and lower 16 TCPs are arranged on the segment side. At this time, upper and lower 16 blocks as shown in FIG. 2 or FIG. 4 are arranged. Further, since the upper and lower patterns are symmetrically arranged, the description here will be limited to only one side. At this time, the first block, the second block, the seventh block, and the eighth block have a design pattern as shown in FIG.
With respect to a block from the third to the sixth made to the design pattern shown in FIG.

For the first block, the second block, the seventh block and the eighth block, the line widths of the connection leads in the areas 47A and 47B shown in FIG. 4 are set as shown in Table 1. And the connection lead resistance of each was made the same.

[0051]

[Table 1]

[0052] The third block, the fourth block, with respect to the fifth block and the sixth block, the line width of the shortest connection leads as shown in FIG. 2 d31, the line width of the right outside of the longest connection lead d ₃₂ was set to indicate the line width d ₃₄ of the left outer connecting leads respectively Table 2, the connection lead resistance of each is set to be the same.

[0053]

[Table 2]

[0054] Each connection lead between the shortest connection lead and right outside of the longest connection lead is patterned in two areas as described in Figure 2, the shortest connection leads and the left edge of the contact
Each connection lead to the continuation lead was also divided into two regions and patterned as described in FIG. Thus, a substrate with electrodes on the segment side was manufactured.

Also, transparent electrodes made of ITO (about 10 Ω / □) were formed in a stripe shape on the soda glass substrate undercoated with SiO ₂ at a pitch of 0.30 mm in a display area in 400 stripes, and TCP terminals were pitched at a pitch of 0.22 mm. And TC
The P output terminals were 100, and were designed in the same manner as the segment side, and a substrate with electrodes on the common side was manufactured.

[0056] As a comparative example, was prepared with Comparative Example 2 which is connected by bending the Comparative Example 1 that is connected kept between the same line as usual connection lead in all linear connecting leads to the shape of "V". The substrates with electrodes of Example 1 and Comparative Examples 1 and 2 were each formed with a polyimide alignment film, and the peripheral parts were sealed with a sealing material except for the injection port to manufacture empty cells.

A nematic liquid crystal was sealed in the empty cell to produce a liquid crystal cell. A phase difference plate and a pair of polarizers are arranged on the outer surface of the liquid crystal cell so that the twist angle for black and white display is 240.
° STN type liquid crystal display element was manufactured. These liquid crystal display elements were capable of displaying 640 × 400 dots.

The resistance of the connection leads on the segment side in Example 1 was almost constant at almost 800Ω or less. The resistance of the connection lead on the segment side in Comparative Example 1 and Comparative Example 2 was about 500Ω at the minimum, and about 1200Ω at the maximum.

In particular, in Comparative Example 1, the resistance of the connection lead greatly fluctuated, and the resistance value fluctuated greatly for all TCPs. For example, in the TCP of the first block,
It was about 1200Ω and about 720 to about 1120Ω in the TCP of the second block. In Comparative Example 1, the design connection according to the present invention was used.
There was a connection lead with a lower resistance than the continuous lead resistance,
The ratio was about 1/8, and not only the variation but also the average resistance was significantly high.

In Comparative Example 2, the minimum and maximum values of the resistance of the connection lead were the same as in Comparative Example 1. However, since the design philosophy is such that the highest resistance is obtained, the first
In the block No. 8 and the block No. 8, the resistance of the connection lead greatly changed from the lowest to the highest, and in the central blocks Nos. 2 to 7, the resistance was kept constant at almost the highest resistance value. Therefore, in the second to seventh block but variations of the connecting lead resistance it was that substantially stomach, resistance than those of the present invention was higher than 50%.

In the embodiment of the present invention, the resistance values of the connection lead wiring portions are lower and uniform as compared with Comparative Examples 1 and 2 as described above. The same result was obtained on the common side as on the segment side.

Table 3 shows the results of confirming the display quality of the liquid crystal display device manufactured by the pattern of Example 1 and the liquid crystal display device manufactured by the pattern of Comparative Examples 1 and 2. As is clear from the results, the liquid crystal display element of Example 1 had almost no display unevenness and crosstalk as compared with Comparative Examples 1 and 2, and a uniform and favorable display state was obtained.

[0063]

[Table 3]

[0064]

According to the display element of the present invention, the connection leads connecting the display element terminal and the driving element terminal such as the TCP terminal are designed to have substantially the same resistance value. unevenness of the contrast is small. In addition, since the design method is simple, complicated calculations are not required. Basically, only two or three types of connection lead line widths are required for each driving element, so that the design becomes extremely easy. Further, the connection resistances from all the driving elements can be easily matched.

[0065] Also, it is relatively low resistance of the connecting leads, since suffices direction two or three wire connection leads, it is easy checking of wiring. In addition, since the shortest connection lead is not bent and wired, there is little danger of short circuit or disconnection. The present invention, within a range that does not impair the effects of the present invention,
Various applications are possible.

[Brief description of the drawings]

FIG. 1 is a plan view showing a basic concept of a wiring pattern of a connection lead according to the present invention.

FIG. 2 is a plan view showing a method for designing a wiring pattern of a connection lead according to the present invention.

FIG. 3 is a plan view showing a resistance of a wiring pattern of a connection lead of the present invention.

FIG. 4 is a plan view showing another wiring pattern of the connection lead of the present invention.

[Explanation of symbols]

1: Display element terminal group 2: TCP terminal group 3: Connection lead group 4: TCP 5: Shortest connection lead 6: Longest connection lead 7A, 7B, 7C, 7D: Area

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G02F 1/1345 G09F 9/30

Claims (4)

(57) [Claims] 1. An electro-optical medium is sealed inside, and a terminal portion is
For driving that is drawn from the display electrode and connected to the driving element
In the display element device terminals are al provided, the connection leads connecting the display electrode and the driving element terminals, both outside
While being formed linearly on the side and the shortest part,
The display electrode end of the shortest connection lead and both outer connection leads
Drive element end than the line connecting the drive element terminal side end of
The slave is the shortest connection leads and parallel to and read the same line width, the display electrode side than the line connecting the respective outer
Is parallel to the connection leads, and the resistance value of the shortest connecting leads, the display device characterized <br/> the resistance of the other connecting lead are routed in the selected line width to be approximately the same . Wherein the length L ₃₁ of the shortest connecting leads, the line width d _31,
The relationship between the length L ₃₂ of the outer connection lead and the line width d ₃₂ is represented by L ₃₁ /
d ₃₁ = L ₃₂ / d ₃₂ and the shortest connection lead and outer connection lead
The connecting leads between de so that the line width d ₃₁ at parallel portions to the shortest connection leads, the table of claim 1, in the portion parallel to the outer connecting leads are such that the line width d ₃₂ <br/> An element. 3. A liquid crystal is sealed between a substrate with a pair of transparent electrodes, the display device according to claim 1 or 2 the driving element is connected to the transparent electrodes of the terminal portion. 4. The driving element is a TCP.
Or the display element of 3 .