KR20040061543A - Method Liquid crystal display device - Google Patents

Abstract

PURPOSE: An LCD panel is provided to design a routing portion having plural routing lines in definite type, thereby reducing interference between the plural routing lines and realizing a uniform resistance difference. CONSTITUTION: Plural gate lines and data lines cross each other in an active area of the first substrate, to define plural pixel areas. In each pixel area, a pixel electrode is disposed. In a crossed part between the gate lines and the data lines, a TFT is formed. A pad portion(109) and a routing portion(111) are formed in a pad area(107) outside the active area. In the pad portion(109), plural gate pads and data pads configure small-sized groups at certain intervals to be connected with a TCP that is electrically connected to a driving circuit. The routing portion(111) has routing lines orthogonal to the gate lines and the data lines from the gate pads and the data pads.

Description

Liquid crystal display panel and its manufacturing method {Method Liquid crystal display device}

The present invention relates to a method of designing a liquid crystal display device, and more particularly, to a method of designing a liquid crystal display device which can increase productivity and reliability by designing a routing part having a plurality of orthogonal routing lines in a standardized manner.

Due to the rapid development of the information and communication field, the importance of the display industry for displaying desired information is increasing day by day. To date, the CRT (cathod ray tube) among information display devices can display various colors and the brightness of the screen is excellent. It has enjoyed steady popularity so far.

However, because of the desire for large, portable and high resolution displays, the development of flat panel displays is urgently needed instead of the CRT. These flat panel displays have a wide range of applications from computer monitors to displays used in aircraft and spacecraft.

Currently produced or developed flat panel displays include liquid crystal display (LCD), electro luminescent display (ELD), field emission display (FED), plasma display panel (PDP), etc. In order to achieve an ideal flat panel display, light weight, high brightness, high efficiency, high resolution, high speed response characteristics, low driving voltage, low power consumption, low cost, and color display characteristics are required.

In general, the CRT displays by controlling the trace of the electron beam by emitting fluorescent material on the surface of the CRT analogously based on the display timing and data signal applied from the outside, whereas the liquid crystal display (LCD) displays each display position. Display by adjusting the transmittance of light by controlling the electric field applied to the LCD.

The liquid crystal display device is composed of two glass substrates and a liquid crystal layer enclosed therebetween, and uses a thin film transistor as a switching element for switching a signal voltage to the liquid crystal layer.

That is, as shown in FIG. 1, the liquid crystal display device includes a first substrate 1 on which a thin film transistor as a switching element is formed, a second substrate 2 on which a color filter is formed, and the It consists of a liquid crystal layer 3 formed between the first substrate 1 and the second substrate 2.

Therefore, it is a non-light emitting element which acquires an image effect by using the electro-optical characteristic of the said liquid crystal.

Here, the thin film transistor array 4, the passivation layer 13, the pixel electrode 4a and the alignment layer 8 are formed on the first substrate 1, and the light blocking film 5 and the color filter layer are formed on the second substrate 2. (6), the common electrode 7 and the alignment film 8 are formed, and the liquid crystal layer 3 is formed between the first substrate 1 and the second substrate 2.

In addition, the first substrate 1 and the second substrate 2 are bonded by a sealing material 9 such as an epoxy resin, and the drive circuit 11 on the PCB 10 is a tape carrier package (TCP). Connected to the first substrate 1 through 12, the driving circuit 11 generates and outputs various control signals and signal voltages for displaying an image.

Although not shown, the first substrate 1 includes a backlight including a light guide plate, a reflection plate, a diffusion plate, and a prism sheet for transmitting light emitted from a light source such as a fluorescent lamp.

Here, the TCP (12) is provided with a plurality of insulated wires respectively for directly and individually supplying various control signals output from the driving circuit to the thin film transistor array (4) on the first substrate (1) have.

In addition, the thin film transistor array 4 is controlled by a control signal of the driving circuit 11 and applies a signal voltage to the pixel electrode 4a by driving the thin film transistor array 4.

In this case, the liquid crystal layer 3 is controlled by using an electric field generated between the pixel electrode 4A and the common electrode 7 by the signal voltage applied to the pixel electrode 4a, thereby transmitting light emitted from the backlight. By controlling the screen can be implemented.

On the other hand, a liquid crystal display device displaying a screen in such a manner is capable of realizing high-definition (HD) graphics beyond XGA (Extended Graphics Array) (1240 × 768 dots), and has a very high resolution Quad Extended Graphics Array (QXGA). ) (2048 × 1536 dots), Quad Super Extended Graphics Array (QSXGA) (2560 × 2048 dots), Quad Ultra Extended Graphics Array (QUXGA) (3200 × 2400 dots), and the like.

Therefore, studies are being actively conducted to reduce the resistance of the wiring formed between the driving circuit 11 and the thin film transistor array 4 and the interference between the plurality of wirings in accordance with the trend of high resolution and large size of the screen.

Hereinafter, a liquid crystal display panel according to the related art will be described with reference to the accompanying drawings.

2 is a plan view of a liquid crystal display panel according to the prior art, in which a first substrate 1 and a second substrate 2 are disposed to face each other, and a liquid crystal layer (3 in FIG. 1) is formed therebetween.

In addition, the first substrate 1 and the second substrate 2 are largely defined as an active region 20 and a pad region 30, and a plurality of gates are formed on the first substrate 1 of the active region 20. A plurality of thin film transistor arrays (4 in FIG. 1) and pixel electrodes (4a in FIG. 1) are formed at portions where lines (not shown) and data lines (not shown) intersect, and the pad region 30 is formed. A plurality of gate pads 33 and data pads 35 are formed on the first substrate 1.

At this time, the driving circuit (11 in FIG. 1) and TCP (12 in FIG. 1) are applied to the pad region 30 outside the active region 20 to apply a control signal and a signal voltage to the active region 20 from the outside. There is a pad portion 31 composed of the gate pad 33 and the data pad 35 which is directly electrically connected from the second side, and the routing portion for connecting the pad portion 31 to the shortest distance from the gate line and the data line. There is 37.

FIG. 3 is a detailed view of portion “A” of FIG. 2, in which a plurality of gate lines G1, G2,..., Gn and data lines D1, are formed in the active region 20 on the first substrate 1. D2, ..., Dn are intersected to define a plurality of pixel regions, and pixel electrodes 4 are disposed in each pixel region, and the gate wirings G1, G2, ..., Gn and data are arranged. Thin film transistors (not shown) are formed at intersections of the wirings D1, D2, ..., Dn.

In addition, in the pad area 30 outside the active area 20, a plurality of pads are formed in a group form at predetermined intervals to connect to a TCP (12 in FIG. 1) electrically connected to a driving circuit (11 in FIG. 1). A pad portion 31 consisting of a gate pad (33 in FIG. 2) and a data pad 35 of the gate pad (33) and the gate line (G1, G2, ..., ...) from the gate pad (33) and the data pad (35). The routing section 37 having the shortest distance to Gn) and the data lines D1, D2, ..., Dn, respectively, is formed.

Here, the pad pitch P between the pads of the gate pads G1, G2, ..., Gn or the data pads D1, D2, ..., Dn is the gate lines G1, G2, .. Since the pixel pitch p between each of the lines ..Gn or the data lines D1, D2, ..., Dn is smaller than the pixel pitch p, a structured routing unit 37 is required.

In this case, the routing part 37 may include the gate part G1, G2,..., Gn and the data lines D1, D2,..., Dn of the pad part 31, the active area 20, and the like. The conductive metal of the same material may be used for the active region 20 or in the gate lines G1, G2, ..., Gn or the data lines D1, D2, ..., Dn, respectively. It is designed in a straight line so as to be the shortest distance to the gate pad 33 and the data pad 35.

Accordingly, in the liquid crystal display device designing method according to the related art, the control signals and the signal voltages of the driving circuit 11 are converted into a plurality of gate lines G1, G2,..., Gn and data lines D1 of the active region 20. Routing section 37 is applied to the pad line at the gate lines G1, G2, ..., Gn and data lines D1, D2, ..., Dn to apply to D2, ..., Dn. It connects by the straight line of the shortest distance to (31).

However, the conventional liquid crystal display panel as described above has the following problems.

The design method of the liquid crystal display device according to the prior art has to be determined after a plurality of tests without a standardized method in order to make the distance between the routing lines more than the minimum specification or to maximize the line width of the routing lines. Poor reliability

In addition, the routing line designed in this way has a disadvantage in that the length of each of the plurality of routing lines is not measured because there is no connection between each adjacent line.

Disclosure of Invention The present invention has been made to solve the above-mentioned problems of the prior art, and provides a design method of a liquid crystal display device which can improve reliability by designing a routing unit having a plurality of orthogonal routing lines in a standardized manner. There is this.

1 is a cross-sectional view of a general liquid crystal display device.

2 is a plan view of a liquid crystal display according to the related art.

3 is a partial detail of A of FIG. 2;

4 is a plan view of a liquid crystal display according to the present invention;

5 is a partial detail of B of FIG. 4.

Explanation of symbols for main parts of the drawings

101: first substrate 103: second substrate

105: active area 107: pad area

108a: Gate Pad 108b: Date Pad

109: pad portion 111: routing portion

111a: routing lines

G1, G2, ..., Gn: Gate Line

D1, D2, ..., Dn, .. D2n: data line

According to an aspect of the present invention, there is provided a liquid crystal display device design method comprising: a plurality of signal lines arranged in one direction at regular intervals in an active area on a substrate, and formed around the active area to drive each signal line; And a plurality of pads formed at intervals narrower than the intervals of the signal lines for connecting to the plurality of pads, and a plurality of routing lines connecting the respective signal lines and each pad in a direction perpendicular to the signal lines. It features.

The plurality of signal lines may be gate lines, and the plurality of pads may be gate pads.

Preferably, the plurality of signal lines are data lines, and the plurality of pads are data pads.

The extension line lengths of the plurality of pads are preferably formed such that the extension line lengths of the pads on the outermost sides are the shortest and the extension line lengths of the pads of the central portion are the longest.

Preferably, the plurality of routing lines are formed such that the routing lines connecting the pads at the outermost sides and the signal lines at the outermost sides are the longest, and the routing lines connecting the pads at the center and the signal lines are the shortest.

In addition, another aspect of the present invention, a plurality of signal lines arranged in one direction at regular intervals in the active region, and the active region at a narrower interval than the interval of the signal lines for connecting each signal line to a driving circuit In the method of designing a liquid crystal display device including a plurality of pads formed on the outside and a plurality of routing portions connecting the respective signal lines and the pads in a direction perpendicular to the signal lines, the length of the vertical extension line of the pad The pad margin is multiplied by one less than the number of channels to be obtained, and the number of half channels divided by the vertical extension line length of the initial pad is calculated, and the length of the routing horizontal line of the routing part is determined by the pixel pitch of the signal line and Proportional to the difference between the pad pitch of the pads and the number of half channels and the variable of the shear channel to be obtained. It is a design method of a liquid crystal display device for calculating.

Here, the routing unit preferably further includes a routing vertical line electrically connected to the signal line in a routing horizontal line.

The length of the routing vertical line is preferably calculated by subtracting the length of the pad portion from the pad margin.

The pad portion and the routing portion are preferably horizontally symmetrical.

A liquid crystal display device design method of the present invention includes an active region having a plurality of pixel regions defined by a plurality of gate lines and data lines, a driving circuit for outputting various control signals and signal voltages to the pixel region, and the driving circuit. And a routing unit having a plurality of lines orthogonal to connect the pad unit, the gate line, and the data line.

That is, by configuring the routing unit orthogonal lines to uniformly design the line width of the routing line and the spacing between the plurality of routing lines to prevent interference between the routing lines, by accurately designing the length of the routing line Since the resistance of each of the plurality of routing lines can be known, reliability and productivity can be improved.

Hereinafter, a design method of the liquid crystal display device of the present invention will be described with reference to the accompanying drawings.

4 is a plan view of a liquid crystal display according to the present invention.

As shown in FIG. 4, a first substrate 101 and a second substrate 103 facing each other with a liquid crystal layer (not shown) therebetween, and a plurality of gates formed on the first substrate 101. An active region 105 in which lines (not shown) and data lines (not shown) are arranged in a matrix form, and an external driving circuit (not shown) at the outer edge of the active region 105. And pad region 107 for electrical connection.

In this case, a plurality of thin film transistors and pixel electrodes driven by the gate line and the data line are formed in the active region 105, and the pad region 107 is used to directly contact the driving circuit or TCP. A pad portion 109 composed of a gate pad 108a and a data pad 108b, and an orthogonal routing line 111a for connecting the gate line and the data line to the pad portion 109, respectively. The routing part 111 which has is formed.

That is, FIG. 5 is a detailed view of portion “B” of FIG. 3, in which the plurality of gate lines G1, G2,..., Gn and data lines are formed in the active region 105 on the first substrate 101. (D1, D2, ..., Dn, .. D2n) are intersected to define a plurality of pixel regions, and pixel electrodes 31 are disposed in each of the pixel regions, and the gate wirings G1, G2,. A thin film transistor (not shown) is formed at the intersection of .., Gn and the data lines D1, D2, ..., Dn, ..2n.

In addition, in the pad region 107 outside the active region 105, a plurality of gate pads 108a and data pads 108b are formed in small groups at predetermined intervals to connect to a TCP electrically connected to a driving circuit. The gate line G1, G2, ..., Gn and the data line D1, D2, ..., Dn, from the pad portion 109 and the gate pad 108a and the data pad 108b. The routing part 111 which has the routing line 111a orthogonal to each of .D2n) is formed.

Here, the routing unit 111 has a pad pitch P between the gate pads 108a and the data pads 108b and the data lines D1, D2,..., Dn, .. D2n. Alternatively, since the pixel pitch p is smaller than the pixel pitch p between the lines of the gate lines G1, G2,..., Gn, the difference between the pixel pitch p and the pad pitch P may be designed using a standardized method. A plurality of orthogonal routing lines 111a are provided.

Accordingly, the liquid crystal display of the present invention can be designed to facilitate the design of the liquid crystal display by shaping a plurality of orthogonal routing lines 111a.

Such a method of designing a liquid crystal display according to the present invention is as follows.

First, since the pad part 109 of the small group is symmetrical, only one channel (data lines D1, D2, ..., Dn) will be considered.

For example, if the pad portion vertical extension line length e ₁ of the initial channel is added to the deviation d of the pad portion vertical extension line length, the pad portion vertical extension line length e ₂ of the second channel becomes the initial pad portion vertical extension line length. pad portion to (e ₁₎ adding the deviation (d) of the vertical extension length is twice the three pad section vertical extension length (e ₃₎ of the second channel.

Accordingly, the length of the pad vertical extension line e _k of the channel to be obtained is multiplied by the deviation k of the length of the pad vertical extension line by the value k-1 subtracted from the number of channels to be obtained. The pad length of the initial channel extends to the length e ₁ .

Equation 1)

e ₁ + d = e ₂

e ₁ + 2d = e ₃

ㆍ

e ₁ + (k-1) d = e _k

In addition, the product of the deviation d of the vertical extension line length of the pad part and the total number of pads n becomes the total pad margin M. FIG.

Equation 2)

d × n = M

Therefore, combining the two formulas, the following formula holds.

Formula 1)

That is, the length of the pad portion vertical extension line e _k of the channel to be obtained is the value of the pad margin M multiplied by one less than the number of channels to be obtained, and the initial channel pad part divided by the total number of channels n. Calculate by adding the vertical extension line length e ₁ .

In this case, the vertical routing line (not shown) of the routing unit 111 may be easily obtained as a difference between the pad unit vertical extension line e _k to be obtained from the pad margin.

Therefore, the vertical routing line of the routing unit 111 according to the present invention can be easily calculated by calculating the length of the pad extension line.

On the other hand, since the pixel pitch p and the pad pitch P each have a constant difference, the length X _k of the routing horizontal line of the routing section can also be obtained.

That is, the length (X _k ) of the routing horizontal line of the routing unit 111 is a variable k-1 of the front channel to be obtained from the pixel pitch (p) and the pad pitch (P) deviation and the total number of channels (n). Can be calculated by multiplying

Formula 2)

X _k = (pP) (n + 1-k)

Accordingly, in the liquid crystal display device designing method of the present invention, the routing unit 111 having a plurality of orthogonal routing lines 111a can be easily calculated by calculating the length of the routing vertical line and the routing horizontal line in a standardized manner. Interference between the 111a may be prevented, and a uniform resistance difference between the routing lines 111a may be provided.

As a result, the design method of the liquid crystal display device of the present invention can improve productivity and reliability by designing the routing unit 111 having a plurality of orthogonal routing lines 111a in a standardized manner.

As described above, the liquid crystal display device design method of the present invention has the following effects.

In the liquid crystal display device design method of the present invention, since the routing unit having a plurality of orthogonal routing lines can be designed in a standardized manner, it is possible to reduce the interference between the routing lines and to design a uniform resistance difference, thereby increasing productivity and reliability. Can be.

Claims (9)

A plurality of signal lines arranged in one direction at regular intervals in the active region on the substrate; A plurality of pads formed outside the active area and formed at a narrower interval than the interval of the signal lines to connect each signal line to a driving circuit; And a plurality of routing lines connecting the signal lines and the pads in a direction perpendicular to the signal lines. The method of claim 1, And the plurality of signal lines are gate lines, and the plurality of pads are gate pads. The method of claim 1, And the plurality of signal lines are data lines, and the plurality of pads are data pads. The method of claim 1, The extension line length of the plurality of pads is formed such that the extension line length of the pads on the outermost sides is the shortest and the extension line length of the pad in the center portion is the longest. The method of claim 1, The plurality of routing lines may have a longest routing line connecting the pads at the outermost sides and the signal lines at the outermost sides, and a shortest routing line connecting the pads at the center with the signal lines. Device. A plurality of signal lines arranged in one direction at regular intervals in the active region, a plurality of pad portions formed outside the active region at intervals narrower than the intervals of the signal lines for connecting each signal line to a driving circuit; In the design method of the liquid crystal display device comprising a plurality of routing units for connecting each signal line and each pad in a direction perpendicular to the signal line, The length of the vertical extension line of the pad part is calculated by multiplying the pad margin by one less than the number of channels to be obtained, and dividing the number of half channels by adding the length of the initial extension line of the initial pad. The length of the routing horizontal line of the routing unit is calculated to be proportional to the difference between the pixel pitch of the signal line and the pad pitch of the pad, the number of half channels, and the difference of the variable of the front end channel to be obtained. Design method. The method of claim 6, And the routing unit further comprises a routing vertical line electrically connected to the signal line in a routing horizontal line. The method of claim 7, wherein The length of the routing vertical line is calculated by subtracting the length of the pad portion from the pad margin. In claim 6, And the pad part and the routing part are horizontally symmetrical.