KR20090116551A - Display panel - Google Patents

Abstract

PURPOSE: A display panel is provided to prevent the dielectric breakdown of the degradation of the driving efficiency and scan electrode or the sustain electrode by controlling the occurrence of the bubble. CONSTITUTION: The bus electrode(210) is arranged on the top of the transparent electrode(200). In the contact surface of the bus electrode and transparent electrode, the contact angle of the bus electrode and transparent electrode is formed. The contact angle(θ) of the transparent electrode and bus electrode is an equation 1: arc tangent(T/S) <= θ <= arc tangent(40T/S)(the area of S : bus electrode cross-section, and the maximum height of T : bus electrode cross-section). The contact angle(θ) of the transparent electrode and bus electrode is an equation 2: the arc tangent(2T/S) <= θ <= arc tangent(20T/S).

Description

Display panel {Display Panel}

The present invention relates to a display panel.

A display panel displays a predetermined image on a screen, and a display panel includes a liquid crystal display (LCD), a field emission display (FED), and an organic light emitting display (OLED). And plasma display panels (PDPs).

One object of the present invention is to provide a display panel with a simple manufacturing process, low manufacturing cost, and improved panel characteristics.

The display panel according to the present invention includes a substrate, a transparent electrode disposed on the substrate, and a bus electrode disposed on the transparent electrode, and the contact angle θ of the transparent electrode and the bus electrode is expressed by the following equation. Preference is given to 1.

Equation 1: arc tangent (T / S) ≤θ ≤ arc tangent (40T / S)

Where S is the area of the cross section of the bus electrodes and T is the maximum height of the cross section of the bus electrodes.

In addition, the contact angle θ of the transparent electrode and the bus electrode is preferably in accordance with Equation 2 below.

Equation 2: arc tangent (2T / S) ≤ θ ≤ arc tangent (20T / S)

Further, the length of the bus electrode cross section is preferably 6 times or more and 48 times or less the maximum height of the bus electrode cross section.

Further, the length of the bus electrode cross section is preferably 11 times or more and 22 times or less of the maximum height of the bus electrode cross section.

In addition, the length of the cross section of the bus electrode is preferably 60 µm or more and 90 µm or less.

In addition, it is preferable that the maximum height of the cross section of the bus electrode is 3 µm or more and 10 µm or less.

In addition, it may be preferable that the contact angle θ of the transparent electrode and the bus electrode is 3 degrees or more and 45 degrees or less.

In addition, the contact angle θ of the transparent electrode and the bus electrode may be 5 ° or more and 30 ° or less.

The shape of the cross section of the bus electrode is preferably a convex shape.

In addition, it is preferable that the electric resistance value of the bus electrode is 30 Ω or more and 70 Ω or less.

In addition, another display panel according to the present invention includes a substrate, a transparent electrode disposed on the substrate, and a bus electrode disposed on the transparent electrode, and the contact angle (θ) of the transparent electrode and the bus electrode is It may be preferable that it is 3 degrees (degrees) or more and 45 degrees (degrees) or less.

In addition, the contact angle θ of the transparent electrode and the bus electrode may be 5 ° or more and 30 ° or less.

Further, the length of the bus electrode cross section is preferably 6 times or more and 48 times or less the maximum height of the bus electrode cross section.

Further, the length of the bus electrode cross section is preferably 11 times or more and 22 times or less of the maximum height of the bus electrode cross section.

In addition, the length of the cross section of the bus electrode is preferably 60 µm or more and 90 µm or less.

In addition, it is preferable that the maximum height of the cross section of the bus electrode is 3 µm or more and 10 µm or less.

The shape of the cross section of the bus electrode is preferably a convex shape.

In addition, it is preferable that the electric resistance value of the bus electrode is 30 Ω or more and 70 Ω or less.

In the display panel according to the present invention, the contact angle between the bus electrode and the transparent electrode is relatively small to prevent bubbles from being generated, thereby preventing the decrease of the driving efficiency by suppressing the generation of bubbles, and thus the scan electrode or the sustain electrode. It is effective to increase the reliability of the electrode, such as to prevent dielectric breakdown.

Hereinafter, a display panel according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, a plasma display panel (PDP) will be described as an example of the display panel. However, the display panel according to the present invention is not limited to the plasma display panel, but a liquid crystal display panel (Liquid Crystal Display, LCD). In some embodiments, the present invention may be a field emission display panel (FED) or an organic light emitting display panel (OLED).

1A to 1B are views for explaining the structure of a plasma display panel.

First, referring to FIG. 1A, the plasma display panel 100 includes a front substrate 101 on which scan electrodes 102 and Y and sustain electrodes 103 and Z are parallel to each other, and scan electrodes 102 and Y and a sustain electrode. And a back substrate 111 on which address electrodes 113 and X intersect with (103, Z) are formed.

The discharge currents of the scan electrodes 102 and Y and the sustain electrodes 103 and Z are limited on the scan electrodes 102 and Y and the sustain electrodes 103 and Z, and the scan electrodes 102 and Y and the sustain electrodes ( An upper dielectric layer 104 may be arranged to insulate between 103, Z).

A protective layer 105 may be formed on top of the upper dielectric layer 104 to facilitate discharge conditions. The protective layer 105 may include a material having a high secondary electron emission coefficient, such as magnesium oxide (MgO).

Address electrodes 113 and X may be formed on the rear substrate 111, and a lower dielectric layer 115 may be formed on the address electrodes 113 and X to insulate the address electrodes 113 and X.

In the upper portion of the lower dielectric layer 115, a discharge space, that is, a partition wall 112 such as a stripe type, a well type, a delta type, a honeycomb type, and the like, for partitioning the discharge cells, is formed. This can be formed. Accordingly, a first discharge cell emitting red (R) light, a second discharge cell emitting blue (B) light, and green (Green) between the front substrate 101 and the rear substrate 111. : G) A third discharge cell or the like that emits light can be formed.

In addition, it is also possible to further form a fourth discharge cell emitting white (W) or yellow (Y) light in addition to the first, second and third discharge cells.

Meanwhile, the widths of the first, second, and third discharge cells may be substantially the same, but the width of at least one of the first, second, and third discharge cells may be different from that of the other discharge cells. .

For example, the width of the first discharge cell that emits red (R) light is the smallest, and the width of the third discharge cell that emits green (G) light and the width of the second discharge cell that emits blue (B) light is first. It can be made larger than the width of the discharge cell. Then, color temperature characteristics of the image to be implemented may be improved. The width of the second discharge cell may be substantially the same or different from the width of the third discharge cell.

In addition, the partition wall 112 may include a first partition wall 112a and a second partition wall 112b that cross each other, where the height of the first partition wall 112a and the height of the second partition wall 112b may be different from each other. have. Here, the first partition wall 112a may be parallel to the long side of the rear substrate 111, and the second partition wall 112b may be parallel to the short side of the rear substrate 111.

In addition, not only the structure of the partition wall 112 illustrated in FIG. 1, but also the structure of the partition wall having various shapes may be possible. In at least one of the channel-type partition structure, the first partition 112a or the second partition 112b in which a channel usable as an exhaust passage is formed in at least one of the first partition 112a or the second partition 112b. A grooved partition wall structure having a groove formed therein may be possible.

In addition, although each of the first, second, and third discharge cells is shown and described as being arranged on the same line, it may be arranged in other shapes. For example, a delta type arrangement in which the first, second and third discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may also be a variety of polygonal shapes, such as pentagonal, hexagonal, as well as rectangular.

In addition, in FIG. 1, only the case where the partition wall 112 is formed on the rear substrate 111 is illustrated, but the partition wall 112 may be formed on at least one of the front substrate 101 and the rear substrate 111.

The discharge gas may be filled in the discharge cells partitioned by the partition wall 112.

In addition, a phosphor layer 114 for emitting visible light for image display may be formed in a discharge cell partitioned by the partition wall 112. For example, a first phosphor layer that generates red light, a second phosphor layer that generates blue light, and a third phosphor layer that generates green light may be formed.

In addition to the first, second, and third phosphors, it is also possible to further form a fourth phosphor layer for generating white (W) and / or yellow (Y) light.

In addition, the thicknesses of the first, second, and third phosphor layers may be different from other phosphor layers. For example, the thickness of the second phosphor layer or the third phosphor layer may be thicker than the thickness of the first phosphor layer. Here, the thickness of the second phosphor layer may be substantially the same or different from the thickness of the third phosphor layer.

In addition, the above description shows only the case where the upper dielectric layer 104 and the lower dielectric layer 115 are each one layer, but at least one of the upper dielectric layer 104 and the lower dielectric layer 115 is shown. May be made of a plurality of layers.

In addition, in order to prevent reflection of external light due to the partition wall 112, a black layer (not shown) capable of absorbing external light may be further disposed on the partition wall 112.

In addition, another black layer (not shown) may be further formed at a specific position on the front substrate 101 corresponding to the partition wall 112.

In addition, although the width and thickness of the address electrode 113 formed on the rear substrate 111 may be substantially constant, the width or thickness inside the discharge cell may be different from the width or thickness outside the discharge cell. . For example, the width or thickness inside the discharge cell may be wider or thicker than that outside the discharge cell.

Next, referring to FIG. 1B, an example of another structure of the scan electrode and the sustain electrode is shown.

The scan electrode 102 and the sustain electrode 103 can each have a multi-layer structure. For example, the scan electrode 102 and the sustain electrode 103 may include transparent electrodes 102a and 103a and bus electrodes 102b and 103b.

Here, the bus electrodes 102b and 103b may include a substantially opaque material such as silver (Ag), gold (Au), aluminum (Al), and the like, and the transparent electrodes 102a and 103a may be substantially transparent. The material may include, for example, indium tin oxide (ITO) material.

In addition, when the scan electrode 102 and the sustain electrode 103 include the bus electrodes 102b and 103b and the transparent electrodes 102a and 103a, to prevent reflection of external light by the bus electrodes 102b and 103b. The black layers 120 and 130 may be further disposed between the transparent electrodes 102a and 103a and the bus electrodes 102b and 103b.

FIG. 2 is a diagram for describing the transparent electrode and the bus electrode of the display panel in more detail. Here, the transparent electrode 200 and the bus electrode 210 illustrated in FIG. 2 may be included in at least one of the scan electrode 102 and the sustain electrode 103 in FIGS. 1A to 1B.

Referring to FIG. 2, the bus electrode 210 is disposed on the transparent electrode 200, and the contact angle between the bus electrode 210 and the transparent electrode 200 is formed at the contact surface between the bus electrode 210 and the transparent electrode 200. Contact Angle) is formed substantially smoothly.

More preferably, when the area of the cross section of the bus electrode 210 disposed above the transparent electrode 200 is S and the maximum height of the cross section is T, the bus electrode 210 and the transparent electrode 200 Contact angle (θ) is according to the following equation (1).

Equation 1: arc tangent (T / S) ≤ θ ≤ arc tangent (40T / S)

According to Equation 1, the cross section of the bus electrode 210 may be convex in a direction opposite to the direction in which the transparent electrode 200 is disposed.

The maximum height T of the cross section of the bus electrode 210 may be preferably a height at a point L / 2 when the length of the cross section of the bus electrode 210 is L. FIG.

In addition, the contact angle θ of the bus electrode 210 and the transparent electrode 200 may be in accordance with Equation 2 below.

Equation 2: arc tangent (2T / S) ≤ θ ≤ arc tangent (20T / S)

As described above, the contact angle θ formed between the bus electrode 210 and the transparent electrode 200 is equal to or greater than arc tangent (T / S), equal to or less than arc tangent (40T / S), or equal to or greater than arc tangent (2T / S). Referring to the attached Figure 3 for the reason to be (20T / S) or less as follows.

3 shows the substrate and the electrode It is a figure for demonstrating an example when the contact angle (theta) is relatively large.

Referring to FIG. 3, the contact angle θ of the transparent electrode 300 and the bus electrode 310 is relatively large, unlike the shape of the electrode of the display panel according to the present invention.

In this case, assume that a functional layer, for example, a dielectric layer, is further formed on the transparent electrode 300 to cover the bus electrode 310.

In FIG. 3, since the contact angle θ of the transparent electrode 300 and the bus electrode 310 is relatively large, the dielectric material forming the dielectric layer is disposed in a space near the point where the bus electrode 310 and the transparent electrode 300 contact each other. It may not be filled enough.

Then, bubbles 320 may be generated by collecting a predetermined gas or moisture in the space between the transparent electrode 300 and the bus electrode 310. The bubble 320 may reduce the driving efficiency of the display panel by increasing the resistance of the scan electrode or the sustain electrode, and may even cause dielectric breakdown of the scan electrode or the sustain electrode during driving.

On the other hand, in the case of FIG. 2, when the dielectric layer is further formed on the transparent electrode 200 and the bus electrode 210, the contact angle between the transparent electrode 200 and the bus electrode 210 ( Since θ) is sufficiently small below the arc tangent (40T / S), the dielectric material constituting the dielectric layer can be more easily filled between the bus electrode 210 and the transparent electrode 200. Therefore, unlike the case of FIG. 3, it is possible to prevent the generation of bubbles.

Table 1 shows data observing whether bubbles are generated according to the contact angle between the transparent electrode and the bus electrode.

Contact angle (θ) Bubble outbreak arc tangent (T / S) X arc tangent (10T / S) X arc tangent (20T / S) X arc tangent (30T / S) X arc tangent (35T / S) X arc tangent (38T / S) X arc tangent (40T / S) X arc tangent (41T / S) 0 arc tangent (45T / S) 0

In Table 1, the contact angle (θ) of the transparent electrode and the bus electrode is changed from arc tangent (T / S) to arc tangent (45T / S), Observe whether bubbles are generated. Here, X marks indicate that bubbles are not generated and are good, and o marks indicate that bubbles are generated and poor.

Referring to Table 1, when the contact angle (θ) of the transparent electrode and the bus electrode is more than arc tangent (T / S) or less than the arc tangent (40T / S), the contact angle (θ) of the transparent electrode and the bus electrode is sufficiently small to generate bubbles. It can be seen that not.

On the other hand, when the contact angle θ of the transparent electrode and the bus electrode is greater than arc tangent (45T / S), it can be seen that the contact angle θ of the transparent electrode and the bus electrode is excessively large and thus bubbles are generated.

Therefore, in order to reduce driving efficiency and breakdown of the electrode due to bubble generation, the transparent electrode and the bus electrode It is preferable that the contact angle θ be equal to or less than arc tangent (40T / S).

On the other hand, when the contact angle θ of the transparent electrode and the bus electrode is excessively small, the cross-sectional area of the bus electrode may be excessively small. Then, the driving efficiency can be lowered by increasing the electrical resistance of the bus electrode.

In addition, it is difficult to form an excessively small contact angle θ between the transparent electrode and the bus electrode in the manufacturing process of the bus electrode, and more precise control of the manufacturing process is required.

Therefore, the contact angle θ of the transparent electrode and the bus electrode is preferably arc tangent (T / S) or more and arc tangent (40T / S) or less, and considering the manufacturing process, bubbles, and electrical resistance, the transparent electrode and the bus The contact angle θ of the electrode may be more preferably arc tangent (2T / S) or more and arc tangent (20T / S) or less.

On the other hand, when the electrical resistance of the bus electrode of the display panel according to the present invention is excessively large, the driving efficiency may decrease when the display panel is driven. Therefore, in order to prevent the deterioration of the driving efficiency, it is necessary to sufficiently lower the electric resistance value of the bus electrode.

In the display panel according to the present invention, the electric resistance value of the bus electrode is not particularly limited, but in order to ensure a sufficiently high driving efficiency, the electric resistance value of the bus electrode may be preferably about 30 Ω or more and 70 Ω or less.

In addition, the shape of the bus electrode 210 as shown in Figure 2 is the transparent electrode 200 and the bus electrode 210 Although the contact angle θ is not particularly limited except that arc tangent (T / S) or more and arc tangent (40T / S) or less, the length of the cross section of the bus electrode 210 in consideration of electrical resistance and manufacturing process, etc. L) and the maximum height T of the cross section can be determined.

For example, when the length L of the cross section of the bus electrode 210 as shown in FIG. 2 is excessively small compared to the maximum height T of the cross section, the area of the cross section of the bus electrode 210 is excessively reduced, thereby reducing the electric resistance value. This may increase excessively, or the transparent electrode 200 and the bus electrode 210 The contact angle θ may be excessively large. On the other hand, when the length L of the cross section of the bus electrode 210 is excessively larger than the maximum height T of the cross section, two adjacent electrodes due to the fluidity of the electrode material during the manufacture of the bus electrode 210. The possibility of electrical shorts between material lines increases.

Therefore, the length L of the cross section of the bus electrode 210 may be preferably 6 times or more and 48 times or less than the maximum height T of the cross section of the bus electrode 210, and more preferably, the length L of the cross section of the bus electrode 210. The length L may be 11 times or more and 22 times or less of the maximum height T of the cross section of the bus electrode 210.

Further, the length L of the cross section of the bus electrode 210 is It may be preferable that the thickness of 60 μm or more and 90 μm or less, and the maximum height T of the cross section of the bus electrode 210 may be 3 μm or more and 10 μm or less.

In consideration of the data of the length L of the cross section and the height T of the cross section of the bus electrode 210, the transparent electrode 200 and the bus electrode 210 may be formed. In order for the contact angle θ to be less than arc tangent (T / S) or less to arc tangent (40T / S), the contact angle θ of the transparent electrode 200 and the bus electrode 210 is greater than or equal to 3 ° and more than 45 °. ) May be less than or equal to, more preferably 5 degrees or more and 30 degrees or less.

4 to 5 are diagrams for explaining an example of still another shape of the bus electrode.

First, referring to FIG. 4, the bus electrode 520 disposed on the upper portion of the transparent electrode 500 has a height h1 of the cross section gradually increasing in the W1 region, but is substantially constant in the W2 region, and in the W3 region. It may decrease gradually.

Alternatively, as shown in FIG. 5, the bus electrode 530 disposed on the transparent electrode 500 has a height h2 of the cross section gradually increasing in the W10 region, gradually decreasing in the W20 region, and again in the W30 region. It may increase gradually and then decrease gradually in the W40 region.

As such, the contact angle θ of the transparent electrode and the bus electrode is greater than arc tangent (T / S). The shape of the bus electrode can be changed under the condition that satisfies the arc tangent (40T / S) or less.

6 to 7 are diagrams for explaining an example of a method of manufacturing a bus electrode.

First, an offset method, which is an example of a direct patterning method, is illustrated in FIG. 6. Here, although only the offset method is described as an example of the direct patterning method in FIG. 6, various methods such as a printing method may be included in the direct patterning method.

Referring to FIG. 6, first, an electrode material 610 in a paste state or a slurry state is coated on a surface of a mold 600 as shown in (a).

Thereafter, the blanket 620 is moved on the surface of the mold 600 to which the electrode material 610 is applied as shown in (b). The electrode material 610 is then buried on the surface of the blanket 620.

On the other hand, the blanket 620 may be in the form of a roller (Roller) in order to more effectively buried the electrode material 610. As such, when the blanket 620 is in the form of a roller, the electrode material 610 may be buried while the blanket 620 is rotated on the surface of the mold 600.

Subsequently, while moving the blanket 620 on which the electrode material 610 is buried as shown in (c) above the display panel manufacturing substrate 630, the electrode material 610 on the surface of the blanket 620 is transparent. To be printed on top of 650.

Thereafter, when the firing or drying process is performed, the bus electrode 640 may be formed on the transparent electrode 650 as shown in (d).

As described above, since the electrode material 610 in a fluid state of paste or slurry is directly printed on the upper portion of the transparent electrode 650, the bus electrode 640 formed after firing or drying due to the surface tension effect and The contact angle θ of the transparent electrode 650 may be less than arc tangent (T / S) or less than arc tangent (40T / S). In addition, the shape of the bus electrode 610 may be convex.

Next, FIG. 7 shows an example of a method of forming an electrode by a photosensitive method without using a direct printing method.

Referring to FIG. 7, first, an electrode material 720 is coated on the display panel manufacturing substrate 700 on which the transparent electrode 710 is disposed as shown in (a).

For example, in step (a), a paste or slurry electrode material prepared by mixing a metal material with other materials such as a solvent and a binder is coated on the top of the screen mask. Pressure may be applied to the squeeze so that the electrode material applied to the upper portion of the screen mask is applied to the upper portion of the substrate 700 on which the transparent electrode 710 is formed through a hole formed in the screen mask.

Thereafter, as shown in (b), a photo mask 730 having a predetermined pattern is formed on the substrate 700 to which the electrode material 720 is coated, and light such as ultraviolet rays is disposed on the photo mask 730. A portion of the electrode material 720 can be cured by irradiating the electrode material 720 through a pattern of. This may be referred to as an exposure process.

Then, the electrode material 720 irradiated with a predetermined light is It develops using a developing solution. This may be referred to as a developing process.

After the developing process, when the drying or baking process is performed, the bus electrode 740 may be formed on the transparent electrode 710 as shown in (c).

In the case of FIG. 7, the contact angle between the bus electrode 740 and the transparent electrode 710 is relatively larger than that of FIG. 7 because the electrode is formed through the exposure and development processes.

Comparing the offset method shown in FIG. 6 and the photosensitive method shown in FIG. 7 described above, in the case of FIG. On the other hand, when the electrode is formed by the offset method shown in FIG. 6, the bus electrode may be formed only by moving the blanket over the substrate. Therefore, the offset method of FIG. 6 may reduce the number of manufacturing processes and the time required for the manufacturing process, compared to the photosensitive method, and thus, the manufacturing cost may be relatively lower.

In addition, when the bus electrode is formed by the offset method shown in FIG. 6, the transparent electrode and the bus electrode It may be easy for the contact angle θ to be less than arc tangent (T / S) or less than arc tangent (40T / S). On the contrary, when the bus electrode is formed by the photosensitive method in FIG. 7, the contact angle θ of the transparent electrode and the bus electrode is likely to be excessively large.

On the other hand, in the case of forming the bus electrode in the same manner as in Figure 7 of the transparent electrode and the bus electrode It is not impossible to make the contact angle θ be less than the arc tangent (T / S) or less than the arc tangent (40T / S), but this may require an additional etching process, resulting in an increase in manufacturing cost, and moreover, transparent electrodes and buses. The contact angle (θ) of the electrode is less than arc tangent (T / S) or less than arc tangent (40T / S) In order to make it possible to increase the precision in the exposure process or the development process, the manufacturing cost thereof can be rapidly increased, which is disadvantageous.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims are as follows. And all changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1A to 1B are views for explaining the structure of a plasma display panel.

2 is a view for explaining the transparent electrode and the bus electrode of the display panel in more detail.

3 shows the substrate and the electrode A diagram for explaining an example in the case where a contact angle is relatively large.

4 to 5 are diagrams for explaining an example of still another shape of the bus electrode;

6 to 7 are views for explaining an example of a method of manufacturing a bus electrode.

<Description of the numbers for the main parts of the drawings>

101: front substrate 102: scan electrode

103: sustain electrode 104: upper dielectric layer

105: protective layer 111: back substrate

112: partition 113: address electrode

114: phosphor layer 115: lower dielectric layer

112a: second partition 112b: first partition

100: plasma display panel

Claims (18)

Board; A transparent electrode disposed on the substrate; And A bus electrode disposed on the transparent electrode; Including, The contact angle (θ) of the transparent electrode and the bus electrode is a display panel according to Equation 1 below. Equation 1: arc tangent (T / S) ≤ θ ≤ arc tangent (40T / S) (S: area of bus electrode cross section, T: maximum height of bus electrode cross section) The method of claim 1, The contact angle (θ) of the transparent electrode and the bus electrode is a display panel according to the following equation (2). Equation 2: arc tangent (2T / S) ≤ θ ≤ arc tangent (20T / S) The method of claim 1, And a contact angle (θ) between the transparent electrode and the bus electrode is greater than or equal to 3 degrees and less than or equal to 45 degrees. The method of claim 3, wherein And a contact angle (θ) between the transparent electrode and the bus electrode is greater than or equal to 5 degrees and less than or equal to 30 degrees. The method of claim 1, And a length of the cross section of the bus electrode is 6 to 48 times the maximum height of the cross section of the bus electrode. The method of claim 5, wherein The length of the cross section of the bus electrode is at least 11 times and 22 times less than the maximum height of the cross section of the bus electrode. The method of claim 1, The length of the bus electrode cross section is Display panel 60 micrometers or more and 90 micrometers or less. The method of claim 1, A display panel of the cross section of the bus electrode is convex. The method of claim 8, The maximum height of the cross section of the bus electrode is 3㎛ 10㎛ less display panel. The method of claim 1, And a display panel having an electrical resistance of 30 Ω or more and 70 Ω or less. Board; A transparent electrode disposed on the substrate; And A bus electrode disposed on the transparent electrode; Including, And a contact angle (θ) between the transparent electrode and the bus electrode is greater than or equal to 3 degrees and less than or equal to 45 degrees. The method of claim 11, And a contact angle (θ) between the transparent electrode and the bus electrode is greater than or equal to 5 degrees and less than or equal to 30 degrees. The method of claim 11, And a length of the cross section of the bus electrode is 6 to 48 times the maximum height of the cross section of the bus electrode. The method of claim 13, The length of the cross section of the bus electrode is at least 11 times and 22 times less than the maximum height of the cross section of the bus electrode. The method of claim 11, The length of the bus electrode cross section is Display panel 60 micrometers or more and 90 micrometers or less. The method of claim 11, A display panel of the cross section of the bus electrode is convex. The method of claim 16, The maximum height of the cross section of the bus electrode is 3㎛ 10㎛ less display panel. The method of claim 11, And a display panel having an electrical resistance of 30 Ω or more and 70 Ω or less.

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