KR100830101B1 - Light Emitting Device - Google Patents

Abstract

Electroluminescent device according to the invention, the substrate; A pixel unit including light emitting parts disposed on a substrate and emitting light by a signal supplied to a first electrode and a second electrode which cross each other; An insulating layer on the substrate having an open portion in an area of the light emitting portions positioned on the first electrode and surrounding the periphery of the pixel portion; Data and scan wirings on the substrate and electrically connected to the first and second electrodes, respectively; And a dummy pattern positioned on the insulating layer surrounding the outside of the pixel portion and having a region in which a plurality of patterns protrude in the direction of the light emitting portions.

Electroluminescent Devices, Indicators, Patterns

Description

Light Emitting Device

Figure 1a is a plan view of a conventional electroluminescent device.

FIG. 1B is an enlarged view of the region "Z1" in FIG. 1A.

Figure 2a is a plan view of an electroluminescent device according to an embodiment of the present invention.

FIG. 2B is an enlarged view of the area "Z2" in FIG. 2A.

FIG. 2C is an enlarged view of a "Z2" region according to another embodiment of FIG. 2A.

2D is an illustration of the projected area grouping of FIG. 2A.

2E is an exemplary view of the dummy pattern shown in FIG. 2A.

3 is a plan view of an electroluminescent device according to a first modified embodiment of the present invention.

4 is a plan view of an electroluminescent device according to a second modified embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

210: substrate 220a, 220b: scan wirings

230: data wirings 240: insulating film

250R, 250G, 250B: Red, Green, Blue Light Emitting Part

260: partition 270: dummy pattern

P: pixel part

The present invention relates to an electroluminescent device.

The electroluminescent device used in the electroluminescent display device was a self-light emitting device having a light emitting layer formed between two electrodes. The electroluminescent device can be classified into an inorganic electroluminescent device and an organic electroluminescent device according to the material of the light emitting layer.

The EL device may be classified into a top emission method, a bottom emission method, and a dual emission method according to a direction in which light is emitted. It can be divided into a matrix type (Passive Matrix) and an active matrix type (Active Matrix).

1A is a plan view of a conventional electroluminescent device, and FIG. 1B is an enlarged view of the "Z1" region of FIG. 1A.

1A and 1B, in the conventional electroluminescent device 100, a pixel portion P is formed on a substrate 110, and scan wirings 120a and 120b are electrically connected to the pixel portion P. Referring to FIGS. And data wiring 130 is formed.

In general, the pixel portion P includes light emitting parts 150R, 150G, and 150B that emit light when a driving signal is supplied to two electrodes electrically connected to the scan wirings 120a and 120b and the data wiring 130. It is separated by).

Conventionally, when the organic light emitting layer or the metal electrode layer is formed, the organic light emitting layer or the metal electrode layer is deposited by arranging with a shadow mask (not shown) using the alignment key 170 formed on the substrate 110 and performing a deposition process.

However, the conventional electroluminescent device 100 has difficulty in identifying their positions when depositing an organic light emitting layer or a metal electrode layer.

First, in the case of the organic light emitting layer, when the dummy pattern (or the dummy pixel) is formed, it is difficult to determine the position at which the organic light emitting layer is to be formed.

In the case of the metal electrode layer, the metal electrode layer must be formed to be electrically connected to the scan wirings 120a and 120b formed on the substrate 110. For example, it is difficult to determine where the first scan wiring is formed. .

In addition, this problem may cause a problem of increased deposition error due to an increase in difficulty from arrangement with a shadow mask to positioning to form an organic light emitting layer or a metal electrode layer when the device is enlarged.

An object of the present invention for solving the above problems is to provide an electroluminescent device capable of improving the quality and reliability as well as increasing the production yield.

In order to solve the above problems, the electroluminescent device according to the present invention includes a substrate; A pixel unit including light emitting parts disposed on a substrate and emitting light by a signal supplied to a first electrode and a second electrode which cross each other; An insulating layer on the substrate having an open portion in an area of the light emitting portions positioned on the first electrode and surrounding the periphery of the pixel portion; Data and scan wirings on the substrate and electrically connected to the first and second electrodes, respectively; And a dummy pattern positioned on the insulating layer surrounding the outside of the pixel portion and having a region in which a plurality of patterns protrude in the direction of the light emitting portions.

The dummy pattern may be formed to protrude in the data wiring direction with a step so as to distinguish and indicate two or more positions of the light emitting portion and the neighboring light emitting portion located at one corner region of the pixel portion.

The dummy pattern may be formed to protrude in a direction in which the light emitting parts are positioned to distinguish a position from the first light emitting part to the nth light emitting part located at one corner area of the pixel part.

The dummy pattern may protrude and have a step in the scanning line direction of the scan wirings so as to distinguish one or more positions of the scan wirings.

The dummy pattern may be formed to distinguish from the scan line of the first scan line of the pixel portion to the scan line of the nth scan line.

The scan wirings may be alternately wired in an odd even form.

The protruding regions of the dummy pattern may be grouped into two or more so that a stepped structure having a predetermined shape may be continuous.

One or more of letters, shapes, or symbols may be displayed on the protruding regions of the dummy pattern.

The dummy pattern may include a corner region or a corner region of the insulating layer, and may be formed to have corner regions with some open regions.

The dummy pattern can form a closed curve connecting each corner of the insulating film.

The dummy pattern may be formed to span the boundary line of the insulating film.

In the dummy pattern, the width of the edge area of the dummy pattern may be thicker than the width of the other area.

The corner region of the dummy pattern may be formed to be adjacent to the edge of the substrate rather than the pixel portion.

The dummy pattern may be an indicator indicating a position for forming a protective film on the substrate.

One or more of letters, shapes, or symbols may be displayed in the corner region of the dummy pattern adjacent to the edge of the substrate.

The dummy pattern may be an alignment key indicating a position arranged with an alignment key of a shadow mask to form an organic, inorganic or metal layer on the substrate.

The dummy pattern may be formed of the same material as any one or more of the first electrode, the light emitting parts, or the second electrode.

The dummy pattern may be formed in multiple layers to prevent the introduction of the sealant formed on the substrate.

The light emitting units may include a light emitting layer formed of an organic material.

<Example 1>

FIG. 2A is a plan view of an electroluminescent device according to an embodiment of the present invention, and FIG. 2B is an enlarged view of the "Z2" region of FIG. 2A.

As shown in FIGS. 2A and 2B, in the electroluminescent device 200 according to the present invention, a first electrode and a second electrode, which are not shown, are positioned on a substrate 210, and the first and second electrodes are disposed on the substrate 210. The pixel portion P including the light emitting portions 250R, 250G, and 250B which emit light by the supplied signal is formed.

In detail, the insulating layer 240 is formed on the substrate 210 to have an open portion on the light emitting portions 250R, 250G, and 250B positioned on the first electrode to surround the outer portion of the pixel portion P. Referring to FIG. Accordingly, the light emitting parts 250R, 250G, and 250B may be formed in the open part of the insulating layer 240 formed on the first electrode. The second electrode may be separately formed by the partition wall 260.

At least one of the illustrated first electrode (eg, anode) and second electrode (eg, cathode) may be formed of a transparent conductive layer (eg, ITO), and the other may be made of metal (eg, Al). It may be formed, but may be formed in a different form from other materials depending on the light emitting method.

The light emitting units 250R, 250G, and 250B may include any one or more of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer in the lower and upper portions of the light emitting layer, and the light emitting layer is formed of an organic light emitting layer, but is not limited thereto.

The pixel unit P is defined as a light emitting area in which a plurality of unit pixels are formed, and the unit pixel Pixel includes light emitting units 250R, 250G, and 250B which are subpixels that emit red, green, and blue light. However, the emission color of the light emitting units 250R, 250G, and 250B is not limited to the above-described red, green, and blue colors, and the unit pixel may be configured of two or more subpixels.

In addition, the scan wires 220a and 220b and the data wires 230 electrically connected to the first electrode and the second electrode formed on the pixel portion P are formed on the substrate 210, respectively. They transmit driving signals, such as data signals and scan signals, supplied from a driving device (eg, driver IC) not shown to the first electrode and the second electrode.

Although not shown, the electroluminescent device 200 formed as described above forms an adhesive (for example, a sealant) in the edge region of the substrate 210 and seals it with a protective substrate to fabricate the device, and electrically connects the driving device to a desired image. It is possible to form a display device that can represent.

Meanwhile, in the electroluminescent device 200 according to the present invention, a region 271 in which a plurality of patterns protrude in the direction of the light emitting parts 250R, 250G, and 250B on the insulating film 240 surrounding the outer portion of the pixel portion P. It includes a dummy pattern 270 having a. In this case, the dummy pattern 270 may be formed to span the outer boundary line of the insulating layer 240, thereby preventing the outer region of the insulating layer 240 from being rolled up due to the loss of adhesive force. In addition, the width of the edge area of the dummy pattern 270 may be formed thicker than the width of the other area.

In the dummy pattern 270, the light emitting parts 250R, 250G, and 250B are formed with a step so as to distinguish two or more positions of the light emitting parts 250R, 250G, and 250B in the corner region of the insulating layer 240. It protrudes toward the data line 230. Here, the dummy pattern 270 is the nth light emitting parts from the light emitting parts of red (250R), green (250G) and blue (250B)) included in the first unit pixel located at one corner area of the pixel part P. It may be formed to distinguish the position up to.

2C is an enlarged view of the “Z2” region according to another embodiment of FIG. 2A.

As illustrated in FIG. 2C, the dummy pattern 270 is disposed on the insulating layer 240 and has a dummy pattern 270 having an area 272 protruding a plurality of patterns in the direction of the light emitting parts 250R, 250G, and 250B. It includes. The protruding regions 271 described above are protruded with steps so as to distinguish and indicate two or more positions of the light emitting units 250R, 250G, and 250B. In addition, the protruding regions 272 may protrude in the scanning line direction of the scan wirings 220a and 220b with a step so as to distinguish one or more positions of the scan wiring. In this case, the protruding region 272 of the dummy pattern 270 may be formed to distinguish the scan line of the first scan line located in one corner area of the pixel portion P from the scan line of the n-th scan line.

Here, the scan wires 220a and 220b may be alternately wired in an odd even form. In this case, the protruding regions 272 of the dummy pattern 270 are alternated in one direction and the other direction of the substrate 210 so as to distinguish and instruct alternately wired scan wirings 220a and 220b. By forming a protrusion.

In addition, one or more of letters, shapes, or symbols may be displayed on the protruding regions 271 and 272 of the dummy pattern to easily distinguish the scan lines of the light emitting parts 250R, 250G, and 250B and the scan lines 220a and 220b, respectively. To help.

2D shows an exemplary view of the projected area grouping of FIG. 2A.

As illustrated in FIG. 2D, the protruding regions 271 and 272 of the dummy pattern 270 may be grouped into two or more protruding regions 271 and 272, respectively, to form a predetermined shape, for example, (A) and (B). It may be formed such that the stepped structure is continuous, such as (C).

In the case of forming the grouping as described above, the chaos between the regions to be divided does not occur, so that the scanning lines of the light emitting units 250R, 250G, and 250B or the scan wirings 220a and 220b can be easily distinguished. When grouping in this way, it is possible to distinguish the positions more easily when the device becomes large.

Meanwhile, the dummy pattern 270 as described above is formed of the same material as at least one of the first electrode, the light emitting parts 250R, 250G, and 250B or the second electrode. That is, it means that the dummy pattern 270 can be formed in the present processing process without any additional process of manufacturing the device, and means that the dummy pattern 270 can be selectively formed in a single layer or multiple layers.

If the dummy pattern 270 is formed as a single layer using the first electrode, the dummy pattern 270 is arranged with an alignment key of a shadow mask to form an organic or inorganic material and a metal layer on the substrate 210. It can also serve as an align key to indicate the location.

This is because the dummy pattern 270 is formed at the position of the alignment key formed on the substrate in order to align with the alignment key of the conventional shadow mask.

FIG. 2E illustrates an exemplary embodiment of the dummy pattern shown in FIG. 2A.

Referring to FIG. 2E, the dummy pattern 270 serves as an indicator indicating a position for forming a role as an indicator for indicating a position for forming a protective film (not shown) on the substrate 270. You can also do

In order for the dummy pattern 270 to serve as an indicator, the edge area of the dummy pattern 270 must be formed thicker than other areas. Therefore, the dummy pattern 270 is formed on the edge of the substrate 210 rather than the pixel portion P. Thick to be adjacent. In addition, any one or more of letters, shapes, or symbols may be displayed in the corner area of the dummy pattern 270 adjacent to the edge of the substrate 210 to effectively perform an indicator role.

Accordingly, the dummy pattern 270 of the electroluminescent device 200 according to the present invention may be easily aligned with the alignment key of the substrate 210 (macroscopically interpreted as the parent substrate) and the shadow mask not shown. It can act as an in key to facilitate the deposition process.

As such, the dummy pattern 270 according to the present invention may play an important role in preventing errors that may occur in the process of manufacturing the device.

3 is a plan view of an electroluminescent device according to a first modified embodiment of the present invention.

As shown in FIG. 3, in the electroluminescent device 300 according to the present invention, a first electrode and a second electrode, which are not shown, are positioned on a substrate 310 and a signal supplied to the first electrode and the second electrode. The pixel portion P including light emitting portions (not shown) that emit light is formed.

In addition, the scan wires 320a and 320b and the data wires 330 electrically connected to the first electrode and the second electrode formed on the pixel portion P are formed on the substrate 310, respectively. They transmit driving signals, such as data signals and scan signals, supplied from a driving device (eg, driver IC) not shown to the first electrode and the second electrode.

The dummy pattern 370 according to the first modified embodiment may apply all aspects of the above-described embodiment. However, the dummy pattern 370 of the first modified embodiment includes a corner region or a corner region of the insulating layer 340 and has a partially open region and is formed to connect corner regions.

In this case, the dummy pattern 370 is formed to span the edge of the edge of the insulating layer 340, thereby more effectively preventing the outer region of the insulating layer 340 from being rolled up due to the loss of adhesive force. In the dummy pattern 370 according to the first modified embodiment, the edge region of the insulating layer 340 may be formed thicker than the other regions.

4 is a plan view of an electroluminescent device according to a second modified embodiment of the present invention.

As shown in FIG. 4, in the electroluminescent device 400 according to the present invention, a first electrode and a second electrode, which are not shown, are positioned on a substrate 410 and a signal supplied to the first electrode and the second electrode. The pixel portion P including light emitting portions (not shown) that emit light is formed.

In addition, scan wires 420a and 420b and data wires 430 electrically connected to the first electrode and the second electrode formed in the pixel portion P are formed on the substrate 410, respectively. They transmit driving signals, such as data signals and scan signals, supplied from a driving device (eg, driver IC) not shown to the first electrode and the second electrode.

The dummy pattern 370 according to the second modified embodiment may apply all aspects of the above-described embodiment. However, the dummy pattern 470 of the second modified embodiment is formed in the form of a closed curve connecting corner regions of the insulating film 440.

In this case, when the dummy pattern 470 is formed in multiple layers by using an organic material or an inorganic material used to form the light emitting parts, the closed curve shape connecting the corner regions of the pixel part P may be internal or internal. It has the effect of blocking or absorbing moisture or oxygen penetrated from the outside.

The moisture absorption effect of the dummy pattern 470 is a solid solution phenomenon in which a material (organic or inorganic) constituting the dummy pattern 470 reacts with water or oxygen to have a degree of solid solubility as if a liquid is dissolved in a solid. This is due to the physical properties that can absorb moisture, oxygen, etc. by solid solution.

Since the dummy pattern 470 may be patterned in the same process as the light emitting units, no additional process is required, and the applicability is very high. In particular, when forming the light emitting portions, the deposition source heated in the vacuum chamber is not deposited on the surface of the mask, but may be utilized, thereby increasing the utility of the material.

In addition, since the dummy pattern 470 according to the second modified embodiment is formed in the shape of a closed curve, the dummy pattern 470 may serve as a blocking film to absorb moisture or oxygen and prevent inflow of the sealant. In this case, when the width of the edge region of the insulating layer 440 is thicker than the width of the other region, the dummy pattern 470 may increase the blocking effect of the edge region having a high penetration rate of moisture or oxygen.

In this case, the dummy pattern 470 is formed in multiple layers by using an organic or inorganic material and a metal layer to have a predetermined height, or a method of forming a thicker thickness in any one of deposition processes (for example, when forming a metal layer). Can be.

As described in each of the above embodiments, the present invention has an effect of providing an electroluminescent device capable of improving quality and reliability as well as increasing production yield.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical configuration of the present invention described above may be modified in other specific forms by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features. It will be appreciated that it may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

As described above, the present invention has the effect of providing an electroluminescent device capable of improving the quality and reliability as well as increasing the production yield.

Claims (19)

Board; A pixel unit including light emitting parts disposed on the substrate and emitting light by a signal supplied to a first electrode and a second electrode which cross each other; An insulating layer positioned on the substrate to have an open portion in an area of the light emitting portions positioned on the first electrode and to surround the periphery of the pixel portion; Data and scan wirings on the substrate and electrically connected to the first and second electrodes, respectively; And And a dummy pattern disposed on an insulating layer surrounding the outside of the pixel portion and having a region in which a plurality of patterns protrude in the direction of the light emitting portions. The method of claim 1, wherein the dummy pattern, And a light emitting unit positioned at one corner of the pixel unit and a light emitting unit adjacent to the adjacent light emitting unit. The method of claim 2, wherein the dummy pattern, And a light emitting portion protruding in a direction in which the light emitting portions are positioned so as to distinguish a position from a first light emitting portion to an nth light emitting portion located at one corner region of the pixel portion.        The method of claim 1, wherein the dummy pattern, Electroluminescent device, characterized in that formed to protrude with a step in the direction of the scan line of the scan wires to distinguish one or more positions of the scan wiring. The method of claim 4, wherein the dummy pattern, And a scan line of the first scan line of the pixel portion from a scan line of the nth scan line. The method of claim 5, wherein the scan wiring, Electroluminescent device, characterized in that alternately wired in an odd even form. The method of claim 2 or 4, wherein the protruding region of the dummy pattern, An electroluminescent device, characterized in that a stepped structure of a predetermined shape is continuous by grouping two or more. The method of claim 2 or 4, wherein the protruding region of the dummy pattern, Electroluminescent element, characterized in that any one or more of the letters, shapes or symbols are displayed. The method of claim 1, wherein the dummy pattern, And an edge region or the edge region of the insulating film, the opening having a partially open region and connected to the edge region. The method of claim 1, wherein the dummy pattern, Electroluminescent device, characterized in that for forming a closed curve connecting each corner of the insulating film. The method of claim 9 or 10, wherein the dummy pattern, And an electroluminescent element formed so as to span the boundary line of the insulating film. The method of claim 1, wherein the dummy pattern, The width of the edge area of the dummy pattern is formed thicker than the width of the other area. The method of claim 12, wherein the corner region of the dummy pattern, The electroluminescent device, characterized in that formed closer to the edge of the substrate than the pixel portion. The method of claim 13, wherein the dummy pattern, And an indicator indicating a position for forming a protective film on the substrate. The method of claim 13, In the corner region of the dummy pattern adjacent to the edge of the substrate, Electroluminescent element, characterized in that any one or more of the letters, shapes or symbols are displayed. The method of claim 1, wherein the dummy pattern, And an alignment key indicating a position arranged with an alignment key of a shadow mask to form an organic, inorganic or metal layer on the substrate. The method of claim 1, wherein the dummy pattern, The electroluminescent device according to claim 1, wherein the first electrode, the light emitting parts, or the second electrode is formed of the same material. The method of claim 1, wherein the dummy pattern, Electroluminescent device, characterized in that formed in multiple layers to prevent the inflow of the sealant formed on the substrate. The method of claim 1, wherein the light emitting portion, Electroluminescent device comprising a light emitting layer formed of an organic material.

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