KR100390423B1 - wiring of organic electroluminescence and method of the same - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides an organic EL wiring for optimizing the overall wiring width and a method of processing the same. The present invention relates to an organic EL for applying a voltage to a light emitting region by connecting a wiring to a vertically formed first electrode strip and a second electrode strip. In the wiring, A plurality of first wiring is formed by crossing the first electrode strips (second electrode strips) to the left and right and sequentially connected, and bent in the direction of the second electrode strips (first electrode strips), And a plurality of second wires connected in the same direction as the second electrode strips (first electrode strips), and a mounting part for TABing the plurality of first wires and the second wire into one.

Description

Wiring of organic electroluminescence and its processing method {wiring of organic electroluminescence and method of the same}

TECHNICAL FIELD The present invention relates to a flat panel display panel, and more particularly, to an electrode wiring of an organic EL and a processing method thereof.

Recently, as the size of the display device increases, the demand for a flat panel display panel with less space is increasing, and as one of such flat panel display panels, an organic EL display panel is attracting attention.

This organic EL display panel is very thin, can be addressed in a matrix form, and can be driven with a low voltage of 15V or less.

The configuration diagram of such an organic EL display element is shown in FIG. 1.

Referring to FIG. 1, an anode strip (ITO strip) 3, which is a transparent electrode, is formed on a transparent substrate 1 in the form of a strip by chemical etching, and then the organic EL layer 4 is vacuumed thereon. It deposits by a vapor deposition method.

Then, a cathode strip 2 is deposited in a direction perpendicular to the anode strip 3.

At this time, since the wirings connected to the anode and the cathode are vertically formed as shown in FIG. 2, two FPCs (Flexible Printed Circuitry) or TCP (Tape Carrier Package) (5) required for mounting the device on a PCB (Printed Circuit Board) are provided. Tape Automated Bonding (TAB).

In case of two TABs in mass production, not only two FPC or TCP (5) prices are included in the cost, but also two TABs are executed. Will disappear.

Therefore, in recent years, TAB is performed only on one side by turning the wiring of one of two electrodes perpendicular to each other in a shape of 'translator (a)' as shown in FIG.

At this time, the structure of the portion subjected to the TAB is shown in detail in FIG.

As shown in FIG. 4, a wire connected with an anode and a cathode is connected to a printed circuit board (PCB) 1 with a connector 7, and the connector 7 is a TAB coupling part 6 which is an external voltage connection line 6. )

Then, a flexible printed circuitry (FPC) or a tape carrier package (TCP) 5 is formed on a predetermined region and wiring of the anode and the cathode.

However, when TAB is performed on one side in this way, the light emitting region is biased to one side (left side) as shown in FIG.

In order to solve this problem, wires are formed by dividing each half in half as shown in FIG. 5 evenly, but the length of the wires to match the resistance of each wire as shown in FIGS. 6 (a) and 6 (b). And width should be adjusted. In other words, when the wiring is long as shown in FIG. 6 (b), the width is widened. When the wiring is short as shown in FIG. 6 (a), the width is narrowed.

Accordingly, in the case of FIG. 6 (a), a large gap between wirings is generated, which is a big problem in the recent trend of manufacturing a wide light emitting area in a small organic EL size.

Accordingly, the present invention has been made to solve the above problems, and an object thereof is to provide an organic EL wiring and its processing method for optimizing the entire wiring width.

1 is a configuration diagram of an organic EL display element according to the prior art

2 is another configuration diagram of an organic EL display element according to the prior art

3 is still another configuration diagram of an organic EL display element according to the prior art

4 shows a general TAB structure

5 is a diagram showing a wiring process of an organic EL according to the prior art.

6 is an enlarged view of a wiring part in the configuration diagram shown in FIG. 5;

Fig. 7 shows the wiring process of the organic EL according to the present invention.

FIG. 8 is an enlarged view of a wiring part in the configuration diagram shown in FIG. 7; FIG.

Explanation of symbols for main parts of the drawings

1: substrate 2, 2-1: cathode

3: anode (ITO strip) 4: organic EL layer

5: FPC or TCP 6: TAB coupling

7: connector

A feature of the wiring processing method of the organic EL according to the present invention for achieving the above object is connected to the first electrode bands and the second electrode strips in a position where the first electrode strips and the second electrode strips cross vertically. In the wiring processing method of the organic EL to apply a voltage to each of the deposited light emitting material, the first wiring to be connected to the first electrode strip (second electrode strip) direction of the second electrode strip (first electrode strip) Forming second wires to be connected to the second electrode strips (first electrode strips) in the same direction as the second electrode strips (first electrode strips), and formed on the left and right sides. And sequentially connecting first wires to the first electrode bands (second electrode bands), and connecting the second electrode bands (first electrode bands) to the second wires. It is characterized by building.

At this time, the width of the first wiring and the second wiring has a different feature to adjust according to the line resistance generated according to the length.

A feature of the organic EL wiring according to the present invention for achieving the above object is that in the wiring of the organic EL to connect the wiring to the first electrode strip and the second electrode strip formed vertically to apply a voltage to the light emitting region, A plurality of first wires intersecting the first electrode strips (second electrode strips) to the left and right and sequentially connected to each other, and being formed by bending in the direction of the second electrode strips (first electrode strips), and the second electrode strips; And a plurality of second wires connected in the same direction as the first electrode strips, and a mounting portion for TABing the plurality of first wires and the second wires into one.

At this time, the width of the first wiring and the second wiring is configured to make the wiring width wider if the length of the wiring is long, and the width of the wiring is narrow when the length of the wiring is short.

The action according to the characteristics of the present invention is to divide the wiring in half in order to align the light emitting area to the center of the substrate to form a translator (a) on both the left and right sides, and cross the wiring of the translator sequentially from left or right or up and down By forming, the resistance between wirings can be made uniform, and cost reduction and optimization of the overall wiring width can be performed.

Other objects, features and advantages of the invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

A preferred embodiment of the wiring processing method of the organic EL according to the present invention will be described with reference to the accompanying drawings.

Fig. 7 is a diagram showing the wiring process of the organic EL according to the present invention.

Referring to FIG. 7, when the initial ITO pattern is formed to reduce the cost through a single TAB, a wire corresponding to one of the two electrodes is bent by a translator a toward the other electrode, and the light emitting region is formed. Pull out the wires on both sides so that it is centered.

In this case, in the case of FIG. 7, the wiring on the cathode 2-1 side is formed by folding the translator toward the anode 3, but if necessary, the wiring on the anode 3 side is in the cathode 2-1 direction. It can be formed by folding.

At this time, the length of the cathode wiring bent by the translator is a difference in length between the cathode wiring in the upper portion and the cathode wiring in the lower portion, resulting in a different resistance value between each wiring.

Due to the line resistance generated as described above, each organic light emitting unit driven at a low voltage of 15V or less causes a problem in that a difference in luminance and a delay in brightness occur at upper and lower portions.

Therefore, in order to match the resistance value of each wiring equally, the method of controlling the width of the wiring is used.

In other words, when the length of the wiring becomes longer, the wiring width is made wider, and when the length of the wiring becomes shorter, the wiring width is made narrower so that the line resistance is equally matched regardless of the length.

Therefore, as shown in Fig. 7, 8, the wires bent by the translator (a) are sequentially crossed to both sides (left and right) and alternately taken out one by one.

By doing in this way, the width | variety of the wiring drawn out to left and right sides is formed to be the same on both left and right sides.

That is, since the length difference between the right wiring and the left wiring is minute, the width of the wiring according to the line resistance can be formed equally. As a result, the wiring widths generated at the left and right sides are the same, so that the light emitting area can be easily positioned at the center, and the wiring width can be optimized.

The wiring having such a structure is formed simultaneously when forming transparent first electrode strips (anode: ITO strips) on the transparent substrate, and forms a partition wall for forming the second electrode strips (cathode) thereon.

In this case, the wires are formed on the left and right sides of the first wires to be connected to the first electrode strips in the direction of the second electrode strips, and the second wires to be connected to the second electrode strips are formed in the same direction as the second electrode strips.

The first wires formed on the left and right sides cross the first electrode bands and are sequentially connected to each other, and the second electrode bands are connected to the second wires.

That is, the first wirings are sequentially connected to the even (odd) first electrode strips to the left and to the odd (even) first electrode strips to the right, regardless of from above or from below.

Subsequently, a red emitting material layer is deposited using a shadow mask.

As in the red luminescent material layer forming method, the green luminescent material layer and the blue luminescent material layer are deposited while moving sideways using another shadow mask, and then the second electrode material is deposited on the entire surface. A second electrode band is formed on the substrate.

Subsequently, a protective film layer (oxygen adsorption layer, moisture adsorption layer, etc.) is formed on the second electrode strip, and encapsulation is performed to complete a full-color organic EL display panel.

As described above, according to the present invention, the wiring processing method of the organic EL may be formed by folding one of the wirings of the two electrodes toward the other electrode in order to make only one TAB in the design of the organic EL device. Is formed by sequentially crossing both sides (left and right or up and down), thereby optimizing the wiring and maximizing the light emitting area.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (5)

In the wiring processing method of the organic EL connected to the 1st electrode strips and the 2nd electrode strips, and apply a voltage to the light emitting material deposited in the position where the said 1st electrode strips and the 2nd electrode strips mutually cross | intersect. First wires to be connected to the first electrode strips (second electrode strips) are formed on the left and right sides by bending in the direction of the second electrode strips (first electrode strips), and the second electrode strips (first electrode strips) are formed. Forming second wires to be connected in the same direction as the second electrode strip (first electrode strip); Sequentially connecting the first wires formed on the left and right sides to cross the first electrode strips (second electrode strips); Connecting the second electrode strips (first electrode strips) with the second wires; And the width of the first wiring and the second wiring is adjusted according to the line resistance generated along the length. delete delete In the wiring of the organic EL which connects a wiring to the 1st electrode strip and the 2nd electrode strip formed in a perpendicular | vertical manner, and apply a voltage to a light emitting area, A plurality of first wires intersecting the first electrode bands (second electrode bands) to the left and right and sequentially connected to each other, and being formed by bending in the direction of the second electrode bands (the first electrode bands); A plurality of second wires connected in the same direction as the second electrode bands; The width of the first wiring and the second wiring is configured to have a wide wiring width when the length of the wiring is long, and a wiring width is narrow when the length of the wiring is short, and includes a mounting portion for TAB as one. Wiring of organic EL. delete