JPH112792A - Liquid crystal display - Google Patents

Abstract

(57) Abstract: In a liquid crystal display device, an uneven output voltage caused by a voltage drop caused by an internal power supply line resistance of an LSI of a signal voltage applying element due to its structure causes luminance unevenness to appear in each pixel block. The purpose is to eliminate. SOLUTION: The number of signal electrodes 12 in a block is 2N (N
Is a positive integer), and Ra is the internal resistance of the power supply line over 2N output channels in the LSI element.
By making it equal to Ra / (2N-1), the resistance value of the signal electrode lead-out portion 13 that can cancel the uneven output voltage of the LSI element at the input end of the signal electrode 12 is obtained. With this configuration, the signal voltage at the input terminal of the signal electrode 12 can be made uniform,
Luminance unevenness that appears for each divided block of the display area can be eliminated, and a uniform liquid crystal display device can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display device using a simple matrix type liquid crystal panel as a display element.

[0002]

2. Description of the Related Art FIG. 13 shows a configuration of a liquid crystal display device using a simple matrix type liquid crystal panel as a display element.

In FIG. 13, reference numerals 1 and 2 denote a pair of glass substrates. A first glass substrate 1 is formed with a vertical band-shaped signal electrode, and a second glass substrate 2 is formed with a horizontal band-shaped scanning electrode. Have been. In these substrates 1 and 2, reference numeral 3 denotes an effective display area, and reference numeral 4 denotes a peripheral BM (black matrix).
The x) area, seal area, and electrode extraction area are shown.

In the case of a simple matrix type liquid crystal display device,
As a signal voltage applying means, L using a semiconductor silicon substrate
An SI element 7 is mounted on a TCP (Tape Carrier Package) 6, the output terminal of which supplies a signal electrode on the first glass substrate 1, and the input side of which supplies a voltage and a data signal. Each is connected to the multilayer printed wiring board 5.

Similarly, as a scanning voltage applying means, an LSI
The element 9 is mounted on the TCP 10, and the TCP 10
The output terminal side is connected to a scanning electrode on the second glass substrate 2, and the input side is connected to a multilayer printed wiring board 8 for supplying a voltage and various control signals.

As shown in FIGS. 10 and 15, the lead-out portion of the signal electrode is formed into a block in accordance with the number of output channels of the LSI element 7 made of a semiconductor silicon substrate, and has a shape converging to the pitch dimension of the TCP 6 output pad. An electrode pattern is formed. 10 and 15, reference numeral 11 denotes a connection pad with the TCP 6, reference numeral 12 denotes a pixel signal electrode, and reference numeral 13 denotes an extraction portion electrode pattern. The lead portion of the scanning electrode has the same form and shape.

In such a conventional structure, a liquid crystal display element in a simple matrix type liquid crystal display device needs to have conductivity and transparency as electrodes due to its principle, and generally has a conductivity such as ITO (indium oxide). A transparent thin film (hereinafter, referred to as a pixel electrode, a signal electrode, a scanning electrode, or the like depending on the application) is used. Also, as shown in FIG.
The dimensional mismatch between the pitch of the signal electrode 12 in the display area and the output electrode pitch of the LSI element 7 is adjusted by both the contraction of the pitch at the lead-out portion of the signal electrode 12 and the pitch expansion by the copper foil pattern of the TCP 6, or only the former. It is common to do.

Conventionally, as a pattern shape of a lead portion of a signal electrode, a band-like pattern bent on a straight line AC shown in FIG. 8, or a bottom side and an upper side shown in FIG. And a trapezoidal pattern consisting of a pad width.

The definitions of the reference numerals in FIGS. 6, 8 and 10 are as follows. 2a: Dimension (mm) of 2N POLB = dimension (mm) of 2N LSI output channels 2b: Dimension (mm) of 2N signal transparent electrodes h: Width (mm) of lead portion of transparent electrode 2a '; Pitch of connection pad to TCP / POLB (μ
m) = 2a / (2N-1) 2b ′; transparent electrode pitch (μm) of effective display area = 2b / (2
N-1) 2a "; width of the connection pad with TCP / POLB (μm) 2b"; width of the transparent electrode in the effective display area (μm) t; film pressure of the lead portion of the transparent electrode (μm) ρ; transparent electrode Resistivity (Ω · μm) Pk; k-th ITO extraction pattern from the left end ak; block center from upper center of Pk (line segment C
Dimensions up to D) bk; block center from lower center of Pk (line segment C)
Dimensions up to D) ck; Length of center line of Pk Wk; (Fig. 6) Width of a portion of Pk αk; Angle formed by perpendicular to center line of Pk Angle β; Inner angle of vertex B of triangle ABC Angle γ Angle of internal angle of vertex C of triangle ABC Angle δ; Angle obtained by subtracting 90 ° from internal angle of vertex B of triangle ABC ek; Pattern length of inclined portion of transparent electrode extraction portion Pk (mm) Wk; (FIG. 8) Extraction of transparent electrode The pattern width (μm) of the vertical portion of the portion Pk Uk; the width Wk of the transparent electrode lead portion Pk is parallelogram ABC
Length of a line segment divided by a diagonal line AC of D (μm) Vk: Pattern width (μm) of the inclined portion of the transparent electrode lead portion Pk

[0010]

However, in the conventional liquid crystal display device, the vertical band-shaped display unevenness shown in FIGS. 14A and 14B often appeared. In the case of FIG.
As shown in FIG. 15C, this is a case where the brightness near the boundary of the block of the signal electrode 12 is higher than the other portions, and the stripes 3A have a bright vertical stripe pattern. In the case of FIG. 14 (b), as shown in FIG. 15 (d), the luminance near the boundary of the block of the signal electrode 12 is lower than that of the other portions, resulting in a vertically dark stripe-like unevenness 3B.

This phenomenon is caused by FRC (Frame Rate Control).
l) Due to technology, it is easy to notice in the case of a full-color single-color display (so-called solid screen display) of the obtained intermediate gradation. This is because the power supply terminal of the LSI element (signal voltage applying element) 7 is affected by the voltage drop due to the internal power supply line, and the signal voltage decreases toward the center of the block. Depending on the drawer shape,
This is because the difference in resistance between the central portion and the left and right portions occurs, and the signal voltage applied to each transparent electrode in the block of the signal electrode 12 does not become the same when displaying a solid screen, which should be originally the same. . The reason why it is conspicuous in the intermediate gradation is that the transmission characteristic of the liquid crystal element with respect to the applied voltage is saturated in the black and white directions, and that the sensitivity to the intermediate voltage is the highest.

FIG. 11 shows a connection state between an equivalent circuit of an output stage of an LSI device 7 which is a signal voltage application device having 2N output channels, and power is supplied from both ends to the output stage, and a transparent electrode lead-out portion 13. Show.

Recent LSI elements (signal voltage applying elements) 7
In order to improve the uniformity of the output voltage as the number of channels increases, a method of supplying power from both ends is generally adopted. In FIG. 11A, Ra is a resistance of a power supply system (supply line and its return) inside the LSI element 7 over 2N output channels. This power supply system is generally formed of an aluminum thin film pattern or the like, and has a resistance of several Ω to several tens Ω. Rs is Ra's (2N-1)
The resistance value is one-half the resistance value, which means the power supply line resistance lying between adjacent channels. Ro indicates the output resistance of each channel when the channel is ON, and has a value of several tens Ω to several hundred Ω. These resistance values have almost no difference between channels due to the internal layout of the LSI element 7 and the method of designing the pattern, and are almost uniform and uniform.

Normally, the output state of each channel of the LSI element 7 depends on the data or video signal displayed at that time, but here, the problem phenomenon is most noticeable.
Consider the case where all channels are uniformly ON. For example, ON and OFF for the entire surface, white halftone (actually gray)
However, it is not necessary to consider an OFF state in which no current flows in the LSI element 7 and the transparent electrode lead-out portion 13. Also, the copper foil pattern portion on the TCP 6, the LSI element 7
Since the resistance value of the connection portion 11 and the like with the TCP 6 is relatively small, it can be ignored. Recent APT (Alto Pleshko Tech
In nology) driving, a signal voltage application method sends out signals for one line from the LSI element 7 at the same time.

Therefore, the signal current for one block is L
Since the current simultaneously flows to the output stage in the SI element 7 and the voltage drop due to the power supply line resistance in the LSI element 7 is large, the output voltage is relatively uneven as described above. In addition,
The scanning voltage is applied in such a manner that a pulse voltage is sequentially applied every one line or several lines, so that the current value is small and the influence of the resistance inside the LSI element 9 and the scanning electrode lead-out portion is small. Rarely appears.

In FIG. 11A, T1, Tk, Tn,
Tn + 1, Tn + k, T2n, etc. are the contacts between the transparent electrode printing portion 13 and the pixel transparent electrode (signal electrode 12), and R1, Rk
, Rn, Rn + 1, Rn + k, and R2n are transparent electrode printing portions 1
3 shows each resistance value.

Here, K = 1 to N, and from the line symmetry of the block, the relationship of Rk = R (2n-k + 1) (to prevent misunderstanding, the subscript suffix is shown by small letters of k and n). Rn + 1 to R2n, Rn to
R1 is substituted.

In order for the terminal voltages of T1 to T2n to be equal, assuming that the current flowing through each terminal is i, Equation 1 must be satisfied. Equation 2 is derived from Equation 1.

[0019]

(Equation 1)

[0020]

(Equation 2)

FIG. 11B is an equivalent circuit obtained by converting the equivalent circuit of FIG. 11A. When each resistance from the power supply line of the LSI element 7 to the pixel transparent electrode terminal is represented by Rtk, Rtk is represented by the following equation (3). expressed.

[0022]

(Equation 3)

In order for Rtk to be equal to Rt for all K = 1 to N, Rsk and Rk must be (Equation 1) as shown in Equation 4.

[0024]

(Equation 4)

The first and second derivatives of Rsk and Rk with respect to K are represented by (Rsk) ', (Rk)',
If (Rsk) ″ and (Rk) ″, then (Equation 2), (Equation 3), (Equation 4), and (Equation 5) of Equation 5 are obtained.

[0026]

(Equation 5)

That is, in order to eliminate the luminance unevenness as described above, it is necessary to make the voltage applied to each transparent electrode (signal electrode) terminal the same value.
The resistance value Rk of (Equation 1) is determined by the position in the block,
It is necessary to set a value that satisfies (Equation 3) and (Equation 5).

Rk is a quadratic equation with respect to K, and its first derivative (Rk) 'must be a linear equation of K, and its second derivative (Rk) "must be a constant Rs. For example, it is necessary that (Rk) ', (Rk) "have the same absolute value as the first derivative (Rsk)', second derivative (Rsk)" of Rsk and have the opposite sign.

As an example, Ra = 11.95Ω, N =
120, so that Rs = 0.05Ω and Rn =
FIG. 12 (a) shows Rk in the case of 200Ω and 250Ω. The difference R (k + 1) −Rk between adjacent Rk is shown in FIG.
FIG. 12B shows the difference (secondary difference) in FIG. 12B. Here, the secondary difference is Rs itself as shown in (Equation 5) and is 0.05Ω.

However, in the "trapezoidal pattern" shown in FIG. 6, Rk, (Rk) ', (Rk) "are (Equation 6), (Equation 7) and (Equation 8) of Equation 6, and Rk is K Is not a simple quadratic, and therefore K exists in the second derivative.

[0031]

(Equation 6)

Therefore, in this pattern, (Equation 1) cannot be satisfied over all terminals. FIG. 7 (a),
The tendency of the resistance values shown in (b) and (c) also indicates this, and luminance unevenness occurs.

In the "one-bend pattern" shown in FIG. 8, Rk, (Rk) ', (Rk) "are (Equation 9), (Equation 10), and (Equation 11) in Equation 7, and Rk is K is a first-order expression and a second-order differential expression is 0. Therefore, even with this pattern, (Equation 1) cannot be satisfied over all terminals.
The tendency of the resistance value shown in FIGS. 9A, 9B, and 9C also indicates this. Also in this case, luminance unevenness may occur.

[0034]

(Equation 7)

As described above, the conventional liquid crystal display device has a problem that the luminance unevenness cannot be completely removed. An object of the present invention is to eliminate luminance unevenness in such a liquid crystal display device.

[0036]

In the liquid crystal display device of the present invention, the number of signal electrodes in a block is 2N (N is a positive integer), and a power supply line extending over 2N output channels in a signal voltage applying element. Assuming that the internal resistance is Ra, the secondary difference between the resistance values of adjacent electrode patterns of the signal electrode group lead-out portion is R
a / (2N-1) or a value close to this value.

According to the present invention, a liquid crystal display device having no luminance unevenness can be obtained.

[0038]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, there is provided a pair of first and second glasses each having a plurality of vertical signal electrodes and a plurality of horizontal scanning electrodes. A liquid crystal display element having substrates opposed to each other and a liquid crystal material sealed in the gap between the opposed glass substrates; a plurality of signal voltage applying elements connected to the signal electrodes to apply a signal voltage; and a scanning voltage applied to the scanning electrodes. A plurality of scanning voltage applying elements, and a signal electrode is blocked for each signal voltage applying element, and the liquid crystal display device is connected by a signal electrode group lead-out section, wherein the signal electrodes in the block are The number is 2N (N
Is a positive integer), and assuming that the internal resistance of the power supply line across the 2N output channels in the signal voltage applying element is Ra, the secondary difference between the resistance values of adjacent electrode patterns of the signal electrode group lead-out portion is Ra / (2N-1) or a value close to this value. The voltage non-uniformity of the output of each channel due to the resistance of the power supply line caused by the internal structure and configuration of the signal voltage applying element is characterized. By forming the pattern of the transparent electrode lead-out portion, it is possible to solve the problem at the input end of the pixel electrode, that is, it has an effect that the signal voltage can be made uniform.

The invention according to claim 2 of the present invention is the invention according to claim 1, which relates to 2N extraction electrode patterns of the signal electrode group extraction portion, and over the entire width of the extraction portion, and A connection pattern between the signal electrode and the corresponding signal voltage application element connection pad is formed in a straight band shape over a certain section of all or a part of the height of the lead portion,
The width of each of the N patterns is a pattern width modulated by multiplying a fixed dimension equal to or less than the pitch of the signal voltage application element connection pad by a cosine of an angle formed by a perpendicular to a center line of each pattern. According to the pattern formation of the present invention, the signal voltage at the input terminal of the pixel electrode can be made uniform, the luminance unevenness appearing for each divided block of the display area can be eliminated, and a uniform liquid crystal display device can be obtained. It has the action of:

The invention according to claim 3 of the present invention is the invention according to claim 1, which relates to 2N extraction electrode patterns of the signal electrode group extraction portion, and covers the entire width of the extraction portion. A connection pattern between the signal electrode and the corresponding signal voltage application element connection pad is linearly formed over a certain section of all or a part of the height of the lead portion, and one end of the connection pattern is formed as the signal. The upper side based on a certain dimension equal to or less than the pitch of the voltage application element connection pad, the other end is a deformed trapezoid having a bottom side based on the dimension equal to or less than the signal electrode pitch, and as 2N pattern widths,
The modulated pattern width is obtained by multiplying the cosine of the angle formed by the perpendicular of the center line of each pattern, and has the same effect as the second aspect of the present invention.

The invention according to claim 4 of the present invention is the invention according to claim 1, which relates to 2N extraction electrode patterns of the electrode group extraction portion, and extends over the entire width of the extraction portion. The connection pattern between the signal electrodes and the corresponding signal voltage application element connection pads over a certain section of all or part of the part height dimension, the center line of the signal electrode group block, and the left and right outermost A broken line having a bend point on an isosceles line of an isosceles triangle formed by a center line of the signal voltage application element connection pad and a dividing line of a fixed section of the height of the lead portion; The center line of the signal electrode and the signal corresponding to a certain dimension not more than the pitch of the signal voltage application element connection pad or not more than the pitch of the signal electrode as the whole or a part of the 2N pattern widths outside the section. Electric A pattern width modulated by multiplying by a square of a cosine of an angle formed by a perpendicular line of a straight line connecting an intersection of a center line of the application element connection pad and a delimiter line of a fixed section of the lead portion height dimension, Claim 2
Has the same function as the invention described in (1).

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the liquid crystal display device of the present invention, Rk shown in the above (Equation 1) is a quadratic expression with respect to K, and
The present invention provides a pattern configuration of the electrode lead-out portion 13 in which (Rk) ″ is Rs as shown in (Equation 5), and realizes a liquid crystal display device capable of performing display without luminance unevenness.

As shown in FIG. 1, a fixed section h2 is set within the drawer height h, and dimensions outside the section are defined as h1 and h.
3 is assumed. Assuming that the pad pitch of the connection pads 11 is 2a 'and the pitch of the vertical band-shaped signal electrodes 12 is 2b', a section of h1 has a width W1k of 2a 'or less, and a section of h3 has a width W3k of 2b' or less. And the section of h2 is W1k, W
A parallelogram pattern having a width W2k is formed on a center line connecting the centers of 3k. In the section of h2, the length of each pattern of the parallelogram is Gk, the angle between the pattern and the perpendicular is α2k, and the width W2 is
k is modulated by multiplying a constant value W2 by a cosine of α2k, and W2k = W
By setting 2 cos α2k and the widths W1k and W3k at constant values W1 and W3 irrespective of K, Equations (12), (13) and (14) of Equation 8 are obtained.

[0044]

(Equation 8)

Rk is a quadratic expression for K, and (Rk
) 'Is a linear expression of K, (Rk) "is a constant not including K, and it is sufficient to set (Rk)" = Rs.
It can be realized relatively easily by selecting a, b, W2, t, h2 and the like.

Rk, (Rk) ', (Rk) "when the values shown in the actual calculation conditions in FIG. 2 are employed are shown in FIG.
(A), (b) and (c) show. (Equation 14) is given by h1
= 0 and h3 = 0, as shown in Figs. 3, 4 (a), (b) and (c).
These are consistent with FIGS. 12A, 12B, and 12C, and a liquid crystal display device without luminance unevenness can be obtained.

As another embodiment, as shown in FIG.
When replacing the parallelogram pattern of two sections with the trapezoidal pattern shown in FIG. 6 and modulating the width W2k by multiplying the cosine cos α2k of the angle α2k with the perpendicular of the pattern, 9 (Equation 15), (Equation 16) and (Equation 17) are obtained, where Rk is a quadratic expression for K, (Rk) 'is a linear expression of K, and (Rk) "contains K. Not a constant.
Therefore, by setting (Rk) ″ = Rs, a liquid crystal display device without luminance unevenness can be obtained.

[0048]

(Equation 9)

H1 = 0.45 mm, h2 = 3.05 mm, h
3 = 0.50 mm W1 = 32 μm, W2a = 32 μm, W2b = 80 μm,
When (Equation 15), (Equation 16), and (Equation 17) are calculated and graphed with W3 = 800 μm, the same characteristics as those in FIGS. 2 (a), (b) and (c) are obtained.

Further, as another embodiment, as shown in FIG. 5, the section is divided into one section and bent at one place, and the width of both or one of the rectangular patterns of the sections h1 and h2 is changed to the corner. When the width is modulated by the square of the cosine of α2k, Expression 10 is obtained, and (Rk) ″ is a constant that does not include K. Therefore, if (Rk) ″ = Rs, a liquid crystal display device without luminance unevenness can be obtained. can get.

[0051]

(Equation 10)

As described above, the pattern width is set to cos αk or cos for various shapes of the pattern of the transparent electrode extraction portion 13.
By modulating with α2k, the signal voltage at the input terminal of the signal electrode 12 can be made uniform, and the luminance unevenness that appears in each divided block of the display area can be eliminated, and a uniform liquid crystal display device can be obtained.

[0053]

As described above, according to the present invention, the non-uniformity of the voltage of each channel output due to the resistance of the power supply line caused by the internal structure and configuration of the signal voltage applying element can be eliminated by the pixel formation in the pattern formation of the transparent electrode lead portion. Since the signal voltage at the input terminal of the electrode can be made uniform, it is possible to provide a liquid crystal display device having uniform display characteristics without causing deterioration in display quality such as uneven brightness due to blocking of the display region.

In the future, larger screens, higher definition, and LS
The effect of the present invention is great while it is expected that display unevenness tends to appear more and more prominently in a liquid crystal display device in which the fine pitch of I is also advanced.

[Brief description of the drawings]

FIG. 1 is a plan view of a signal electrode lead portion of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram showing an example of a resistance value characteristic of the electrode lead portion pattern of FIG.

FIG. 3 is a plan view of a signal electrode lead portion of a liquid crystal display device according to another embodiment of the present invention.

FIG. 4 is a characteristic diagram showing an example of a resistance value characteristic of the electrode lead portion pattern of FIG.

FIG. 5 is a plan view of a signal electrode lead portion of a liquid crystal display device according to another embodiment of the present invention.

FIG. 6 is a plan view of a signal electrode lead portion of a conventional liquid crystal display device.

FIG. 7 is a characteristic diagram showing an example of a resistance value characteristic of the electrode lead portion pattern of FIG.

FIG. 8 is a plan view of a signal electrode lead-out portion of a conventional liquid crystal display device.

FIG. 9 is a characteristic diagram showing an example of a resistance value characteristic of the electrode lead portion pattern of FIG.

FIG. 10 is a drawing showing an example of a form of a transparent electrode lead-out section and a definition of dimensions of each section.

FIG. 11 is a simplified equivalent circuit of a drive voltage applying element having a 2N-channel output and a transparent electrode lead-out section.

FIG. 12 is a characteristic diagram illustrating a theoretical resistance value characteristic of a transparent electrode lead-out portion where luminance unevenness does not occur.

FIG. 13 is a plan view illustrating a configuration of a liquid crystal display device.

FIG. 14 is a diagram showing a display screen quality in which block luminance unevenness appears.

FIG. 15 is a diagram showing a block configuration of a signal electrode and a signal voltage applying element and a pattern formation of an electrode lead portion, and a characteristic diagram showing luminance characteristics corresponding to block luminance unevenness.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 First glass substrate having a plurality of vertical band-shaped signal electrodes 2 Second glass substrate having a plurality of horizontal band-shaped scanning electrodes 3 Effective display area 4 Peripheral BM (Black Matrix) portion and seal Part 5, 8 Multilayer printed wiring board 6, 10 TCP (Tape Carrier Package) 7 LSI element for signal electrode drive 9 LSI element for scan electrode drive 11 Connection electrode part between TCP and lead-out part of transparent electrode 12 Vertical band signal Electrode 13 Leader of transparent electrode

Claims (4)

[Claims] A pair of first and second glass substrates having a plurality of vertical signal electrodes and a plurality of horizontal scanning electrodes are opposed to each other, and a liquid crystal material is filled in a gap between the opposed glass substrates. A sealed liquid crystal display element, a plurality of signal voltage applying elements connected to the signal electrodes for applying a signal voltage, and a plurality of scanning voltage applying elements connected to the scanning electrodes for applying a scanning voltage; A liquid crystal display device in which signal electrodes are blocked for each voltage applying element and connected by a signal electrode group lead-out portion, wherein the number of signal electrodes in the block is 2N (N is a positive integer), and the signal voltage Assuming that the internal resistance of the power supply line across the 2N output channels in the application element is Ra, the secondary difference between the resistance values of the adjacent electrode patterns of the signal electrode group lead-out portion is equal to Ra / (2N-1), or This value The liquid crystal display device which is characterized in that a value close. 2. The 2N extraction electrode patterns of the signal electrode group extraction portion, wherein the signal electrode extends over the entire width of the extraction portion and over a certain section of all or a part of the extraction portion height dimension. And the connection pattern with the corresponding signal voltage application element connection pad,
A pattern formed by forming a linear band shape and multiplying a fixed dimension equal to or smaller than the pitch of the signal voltage application element connection pad by a cosine of an angle formed by a perpendicular to a center line of each pattern as 2N pattern widths. The liquid crystal display device according to claim 1, wherein the liquid crystal display device has a width. 3. The 2N extraction electrode patterns of the signal electrode group extraction portion, wherein the signal electrode extends over the entire width of the extraction portion and over a certain section of all or a part of the extraction portion height dimension. And the connection pattern with the corresponding signal voltage application element connection pad,
A deformed trapezoid that is formed in a linear shape and has, as its shape, one end having an upper side based on a certain dimension equal to or less than the pitch of the signal voltage application element connection pad and the other end having a bottom side based on a dimension equal to or less than the signal electrode pitch. 2. The liquid crystal display device according to claim 1, wherein each of the 2N pattern widths is a pattern width modulated by multiplying a cosine of an angle formed by a perpendicular of a center line of each pattern. 4. The 2N number of extraction electrode patterns of the electrode group extraction portion, wherein the signal electrode and the signal electrode are connected over the entire width of the extraction portion and over a predetermined section of all or a part of the height of the extraction portion. The connection pattern with the corresponding signal voltage application element connection pad is
An isosceles line of an isosceles triangle formed by a center line of the signal electrode group block, a center line of the left and right outermost signal signal application element connection pads, and a dividing line of a fixed section of the height of the lead portion. No broken line with a bending point on the upper part, and the pattern width of all or a part of the 2N patterns outside the certain section, not more than the pitch of the signal voltage application element connection pad or not more than the pitch of the signal electrode Cosine of an angle formed between a center line of the signal electrode and the center line of the corresponding signal voltage applying element connection pad and a perpendicular line of a straight line connecting the intersection of the center line of the height dimension of the lead portion to a certain dimension. 2. The liquid crystal display device according to claim 1, wherein the modulated pattern width is obtained by multiplying the square by the following equation.