Organic light emitting display device and manufacturing method thereof

Abstract

An embodiment of the present invention discloses an organic light-emitting display device, which includes: a display layer, including a light-emitting area, a first non-light-emitting area arranged with a pixel defining film surrounding the light-emitting area, and a second non-light-emitting area further provided with a separator on the pixel defining film; a light-shielding layer, provided with a first black matrix and a second black matrix covering the first non-light-emitting area and the second non-light-emitting area respectively; a touch screen layer, having touch electrodes arranged at positions corresponding to the first black matrix and the second black matrix, and the dielectric constants of the first black matrix and the second black matrix are different from each other.

Description

Technical Field

[0001] Embodiments of the present invention relate to an organic light emitting display device and a method for manufacturing the same, and more particularly to an organic light emitting display device with a built-in touch screen layer and a method for manufacturing the same. Background Art

[0002] Generally, an organic light-emitting display device presents images based on the principle that holes and electrons injected from an anode and a cathode recombine in a light-emitting layer to emit light. The structure of its pixels is composed of an organic light-emitting element having a light-emitting layer inserted between a pixel electrode serving as an anode and a counter electrode serving as a cathode.

[0003] Furthermore, a touch screen layer for a user to perform a touch operation and a light shielding layer for shielding areas of the pixels except for the light-emitting areas are provided on the display layer where the pixels are arranged.

[0004] However, the sensitivity of the touch electrodes provided in the touch screen layer is not uniformly formed throughout the touch screen layer, but is relatively sensitive in some parts and relatively dull in some parts. In particular, the difference in sensitivity between the area of ​​the partition formed on the display layer for mounting the mask for deposition of the light-emitting layer and other areas is large, which is presumed to be caused by the increase in the difference in spacing between the counter electrode and the touch electrode formed on the partition protruding higher than the periphery.

[0005] In this case, there is a high possibility that the user's touch operation cannot be performed naturally and smoothly due to the uneven touch sensitivity, which ultimately leads to product defects. Summary of the invention

[0006] Embodiments of the present invention provide an organic light emitting display device and a method for manufacturing the same which are improved to efficiently solve the problem of a difference in touch sensitivity between different portions due to a partition or the like.

[0007] An embodiment of the present invention provides an organic light-emitting display device, which includes: a display layer, including a light-emitting area, a first non-light-emitting area arranged with a pixel defining film surrounding the light-emitting area, and a second non-light-emitting area further provided with a separator on the pixel defining film; a light-shielding layer, provided with a first black matrix and a second black matrix covering the first non-light-emitting area and the second non-light-emitting area respectively; a touch screen layer, having touch electrodes arranged at positions corresponding to the first black matrix and the second black matrix, wherein the dielectric constants of the first black matrix and the second black matrix are different from each other.

[0008] The touch screen layer may be arranged on the display layer, the light shielding layer may be arranged on the touch screen layer, and the dielectric constant of the second black matrix is ​​greater than the dielectric constant of the first black matrix.

[0009] The light shielding layer may be arranged on the display layer, the touch screen layer may be arranged on the light shielding layer, and the dielectric constant of the first black matrix is ​​greater than the dielectric constant of the second black matrix.

[0010] A transparent organic film covering the light emitting area may be further provided on the light shielding layer.

[0011] The transparent organic film may cover the first black matrix and may also cover the second black matrix.

[0012] The transparent organic film may cover the first black matrix but may not cover the second black matrix.

[0013] A moisture blocking layer for preventing the display layer from getting wet may also be provided.

[0014] The display layer includes a light-emitting layer arranged in the light-emitting area, pixel electrodes arranged opposite to each other with the light-emitting layer sandwiched therebetween, and a counter electrode, and the counter electrode may be arranged via the light-emitting area and the first and second non-light-emitting areas.

[0015] Other aspects, features, and advantages besides the foregoing will become apparent from the following drawings, the scope of the claims, and detailed description of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of an organic light emitting display device according to an embodiment of the present invention.

[0017] Figure 2a to Figure 2c It is shown in sequence Figure 1 A cross-sectional view of the manufacturing process of an organic light emitting display device is shown.

[0018] Figure 3 is a cross-sectional view of an organic light emitting display device according to another embodiment of the present invention.

[0019] Figure 4 is a cross-sectional view of an organic light emitting display device according to yet another embodiment of the present invention.

[0020] Figure 5a to Figure 5d It is shown in sequence Figure 4 A cross-sectional view showing a manufacturing process of an organic light emitting display device.

[0021] Figure 6is a cross-sectional view of an organic light emitting display device according to yet another embodiment. DETAILED DESCRIPTION

[0022] The present invention can be subjected to various changes and can have various embodiments, and specific embodiments are shown in the drawings and described in detail in the specific embodiments. Figure 1 The effects and features of the present invention and methods for achieving the same will become clear from the embodiments described below in detail. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms.

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals and repeated description thereof is omitted.

[0024] In the following embodiments, the terms "first" and "second" are not used in a limiting sense but are used for the purpose of distinguishing one constituent element from other constituent elements.

[0025] In the following embodiments, a singular expression includes a plural expression unless otherwise clearly indicated in the context.

[0026] In the following embodiments, terms such as including or having indicate the presence of features or constituent elements described in the specification, and do not preclude the possibility of adding one or more other features or constituent elements.

[0027] For the convenience of explanation, the size of the components in the drawings may be exaggerated or reduced. For example, for the convenience of explanation, the size and thickness of each component shown in the drawings are arbitrarily shown, so the present invention is not necessarily limited to what is shown in the drawings.

[0028] In the case where a certain embodiment can be implemented in different ways, a specific process sequence can be performed in a different order than the described sequence. For example, two processes described in succession can be performed substantially simultaneously, or in a sequence opposite to the described sequence.

[0029] In the following embodiments, when films, regions, components, etc. are mentioned as being connected, it includes not only the case where the films, regions, components, etc. are directly connected, but also the case where other films, regions, components, etc. are sandwiched between them and they are indirectly connected. For example, in this specification, when films, regions, components, etc. are mentioned as being electrically connected, it includes not only the case where the films, regions, components, etc. are directly electrically connected, but also the case where other films, regions, components, etc. are sandwiched between them and they are indirectly electrically connected.

[0030] Figure 12 is a cross-sectional view of an organic light emitting display device according to an embodiment of the present invention. Here, only one organic light emitting element is shown as a reference, but it can be considered that a plurality of such organic light emitting elements are distributed in an actual product.

[0031] As shown in the figure, the organic light-emitting display device is equipped with: a display layer 100 for displaying images; a touch screen layer 200 for touch operation; a shading layer 300 for shielding non-luminous areas 11 and 12 outside the luminous area 10 with black matrices 311 and 312 in order to present a black visual effect; and a window layer 400 as the outermost protective layer.

[0032] First, it can be seen from the display layer 100 that an organic light-emitting element including a pixel electrode 101, a light-emitting layer 102, and a counter electrode 103 is arranged on the insulating layer 120 on the substrate 110, and the light-emitting region 10 of the organic light-emitting element is surrounded by a pixel defining film 130, and separators 140 are intermittently arranged on the pixel defining film 130. In addition, a thin film encapsulation layer 150 is covered on the organic light-emitting element.

[0033] The pixel definition film 130 serves to partition the light emitting region of the organic light emitting element, and the partition 140 serves as a support stage for supporting a deposition mask (not shown) when depositing the light emitting layer 102 .

[0034] Here, the non-luminous region where the partition 140 is not provided but only the pixel defining film 130 is provided is referred to as a first non-luminous region 11 , and the non-luminous region where the partition 140 and the pixel defining film 130 are provided together is referred to as a second non-luminous region 12 .

[0035] In addition, the substrate 110 is provided with a thin film transistor (not shown) and a capacitor (not shown) connected to the organic light emitting element, which are simplified and omitted for the sake of convenience.

[0036] The touch screen layer 200 disposed on the display layer 100 is provided with an organic film 220 as a base layer, a touch electrode 210 disposed in the organic film 220, and a touch screen layer made of, for example, SiN x The touch screen layer 200 is formed by the same film forming process as the display layer 100, and is not manufactured as a separate component and then attached.

[0037] The light shielding layer 300 on the touch screen layer 200 includes a first black matrix 311 and a second black matrix 312 covering the first non-luminous area 11 and the second non-luminous area 12 respectively, and a transparent organic film 320 covering the area including not only the first black matrix 311 and the second black matrix 312 but also the luminous area 10. The first black matrix 311 and the second black matrix 312 cover the first non-luminous area 11 and the second non-luminous area 12 except the luminous area 10, so as to provide a neat black visual effect when not in use, and although the transparent organic film 320 covers the luminous area 10, it has no effect on the luminescence because it is made of transparent material.

[0038] Furthermore, the window layer 400 as the outermost layer is provided with a polarizing film 410, a window 420, and an adhesive layer 430, etc. Reference numeral 500 indicates a moisture blocking layer for preventing moisture from penetrating into the display layer 100, which may be formed of a hydrophobic material such as a fluorinated silane promoter, a fluorinated acrylic monomer, or a fluorinated alkyl.

[0039] Here, the first black matrix 311 and the second black matrix 312 of the light shielding layer 300 have different dielectric constants, which is a compensation measure for the difference in the impact of the first non-luminous area 11 and the second non-luminous area 12 on the touch screen layer 200 .

[0040] That is, the first non-luminous region 11 of the display layer 100 is only provided with a pixel defining film 130, and the pixel defining film 130 and the separator 140 are provided together in the second non-luminous region 12, so that the spacing between the counter electrode 103 formed thereon and the touch electrode 210 is different. That is, the counter electrode 103 of the organic light-emitting element is not only arranged opposite to the pixel electrode 101 with the light-emitting layer 102 of the light-emitting region 10 sandwiched in the middle, but also arranged on the pixel defining film 130 and the separator 140 of the first non-luminous region 11 and the second non-luminous region 12, so that the distance between the counter electrode 103 and the touch electrode 210 is closer in the relatively thicker separator 140 portion than in the portion provided with only the pixel defining film 130. In this case, the influence of the counter electrode 103 on the touch electrode 210 will be different, thereby causing deviation in the sensitivity of the touch operation. In particular, the sensitivity of the second non-luminous area 12 which is relatively close to the electrode 103 and the touch electrode 210 is lower than that of the first non-luminous area 11 which is relatively far from the electrode 103 and the touch electrode 210. This is presumed to be due to the influence of the parasitic capacitance between the two electrodes 103 and 210.

[0041] Therefore, in order to compensate for this, in this embodiment, the dielectric constants of the first black matrix 311 and the second black matrix 312 in the light shielding layer 300 disposed on the touch screen layer 200 are configured to be different.

[0042] According to experiments, for the above structure, as shown in Table 1 below, as the dielectric constants of the first black matrix 311 and the second black matrix 312 increase, the sensitivity of the touch electrode 210 increases. S / N represents the ratio of the signal to noise of the touch electrode 210.

[0043]

Table 1

[0044] Dielectric constant (k) 2 3 4 10 50 S / N 14.24 14.55 14.86 15.15 15.42

[0045] Therefore, in the present embodiment, the dielectric constant of the second black matrix 312 of the second non-luminescent region 12 having relatively low touch sensitivity is made greater than the dielectric constant of the first black matrix 311 of the first non-luminescent region 11 .

[0046] In this way, the difference in touch sensitivity caused by the partition 140 will be compensated by the sensitivity difference based on the dielectric constant of the first black matrix 311 and the second black matrix 312, so that the touch sensitivity of the first non-luminous area 11 and the second non-luminous area 12 is compensated and becomes uniform.

[0047] In this way, the touch sensitivity difference between the first non-luminous area 11 and the second non-luminous area 12 can be compensated by making the dielectric constants of the first black matrix 311 and the second black matrix 312 of the light shielding layer 300 different, thereby making it uniform, and finally ensuring stable touch operation.

[0048] The organic light emitting display device equipped with such a light shielding layer 300 can be Figures 2a to 2c Manufactured as shown.

[0049] First, if Figure 2a After the touch screen layer 200 is formed on the display layer 100, the first black matrix 311 and the second black matrix 312 are respectively formed thereon by a photoresist process or an inkjet process. Of course, the second black matrix 312 uses a material with a higher dielectric constant than the first black matrix 311.

[0050] Then, if Figure 2b As shown, a transparent organic film 320 is covered thereon. Figure 2c The moisture blocking layer 500 and the window layer 400 are formed in a continuous manner.

[0051] In this way, by forming a shading layer 300 with different dielectric constants of the first black matrix 311 and the second black matrix 312, the touch sensitivity difference between the first non-luminous area 11 and the second non-luminous area 12 is compensated, thereby ensuring a stable touch operation and improving the performance and reliability of the product.

[0052] Next, Figure 3 is a cross-sectional view showing an organic light emitting display device according to another embodiment.

[0053] In this embodiment, the dielectric constants of the first black matrix 311 and the second black matrix 312 located in the light shielding layer 300 are also set to be different from each other. Figure 1 Compared with the structure of FIG. 4 , the stacking order of the light shielding layer 300 and the touch screen layer 200 is reversed. Although the structure of arranging the light shielding layer 300 closer to the display layer 100 has the advantage of ensuring the field of view, it has the disadvantage of being somewhat disadvantageous in the black visual effect because the touch electrode 210 of the touch screen layer 200 can be seen through the window layer 400.

[0054] That is, in Figure 1 In the structure, since the first black matrix 311 and the second black matrix 312 of the light-shielding layer 300 cover the first non-luminous area 11 and the second non-luminous area 12 and at the same time completely cover the touch electrodes 210 of the touch screen layer 200, the black visual effect will be better, but due to the intervention of the touch screen layer 200, the distance from the light-emitting layer 102 serving as the light source to the light-shielding layer 300 becomes farther, so the viewing angle becomes relatively narrow.

[0055] However, Figure 3 In contrast to this, the structure of has a short distance from the light emitting layer 102 serving as the light source to the light shielding layer 300, so the viewing angle is widened like a wide-angle lens. However, as mentioned above, since the touch screen layer 200 is visible through the window layer 400, the visual effect of black may be reduced.

[0056] Since the two solutions have their own advantages and disadvantages, one of the solutions can be selectively adopted according to the necessary specifications. This embodiment shows that even in the case of Figure 3 In the structure, the touch sensitivity can also be compensated by making the dielectric constants of the first black matrix 311 and the second black matrix 312 different from each other.

[0057] However, in Figure 3 In the case of the structure where the light shielding layer 300 is located between the display layer 100 and the touch screen layer 200 , as shown in the experimental results of Table 2 below, the lower the dielectric constants of the first black matrix 311 and the second black matrix 312 , the higher the sensitivity of the touch electrode 210 .

[0058]

Table 2

[0059] Dielectric constant (k) 2 3 4 10 50 S / N 17.46 17.45 17.43 17.37 17.28

[0060] Therefore, in the structure of this embodiment, the dielectric constant of the second black matrix 312 of the second non-luminous region 12 with relatively low touch sensitivity is made smaller than the dielectric constant of the first black matrix 311 of the first non-luminous region 11. In other words, the dielectric constant of the first black matrix 311 is made larger than the dielectric constant of the second black matrix 312.

[0061] In this way, similarly, since the difference in touch sensitivity caused by the partition 140 will be compensated by the sensitivity difference based on the dielectric constant of the first black matrix 311 and the second black matrix 312, the touch sensitivity of the first non-luminous area 11 and the second non-luminous area 12 is compensated and becomes uniform.

[0062] In this way, by making the dielectric constants of the first black matrix 311 and the second black matrix 312 of the light shielding layer 300 different, the touch sensitivity difference between the first non-luminous area 11 and the second non-luminous area 12 is compensated and made uniform, and finally a stable touch operation can be guaranteed.

[0063] Next, Figure 4 is a cross-sectional view of an organic light emitting display device according to another embodiment. Figure 1 The structure is the same as that of the first black matrix 311, and the dielectric constant of the second black matrix 312 is larger than that of the first black matrix 311. Figure 1 The structure is the same.

[0064] However, it is shown here that the transparent organic film 320 may not be formed throughout the entire area of ​​the light shielding layer 300. That is, although the transparent organic film 320 covers the first black matrix 311, the transparent organic film 320 does not cover the second black matrix 312, and the second black matrix 312 and the transparent organic film 320 are formed with almost the same thickness.

[0065] The above structure can be Figure 5a to Figure 5b Made in.

[0066] First, if Figure 5a As shown, after the touch screen layer 200 is formed on the display layer 100, a first black matrix 311 is formed in the first non-luminescent region 11 thereon by a photolithography process.

[0067] Then, if Figure 5b As shown, a transparent organic film 320 and a moisture blocking layer 500 are formed in the light emitting region 10 and the first non-light emitting region 11 .

[0068] Then, if Figure 5cAs shown, the second black matrix 312 is formed in the second non-luminescent region 12 by inkjet process. Of course, the second black matrix 312 is made of a material with a larger dielectric constant than the first black matrix 311.

[0069] Then, if Figure 5d A window layer 400 is shown formed thereon.

[0070] Therefore, in this embodiment, the shading layer 300 having different dielectric constants of the first black matrix 311 and the second black matrix 312 is formed to compensate for the difference in touch sensitivity between the first non-luminous area 11 and the second non-luminous area 12, thereby achieving a structure that ensures stable touch operation.

[0071] Figure 6 is a cross-sectional view showing an organic light emitting display device according to still another embodiment.

[0072] This embodiment is basically Figure 3 The structure is the same as that of the first black matrix 311, and the dielectric constant of the first black matrix 311 is greater than the dielectric constant of the second black matrix 312. Figure 3 The structure is the same.

[0073] However, although the transparent organic film 320 covers the first black matrix 311, it does not cover the second black matrix 312. The second black matrix 312 and the transparent organic film 320 are formed with almost the same thickness. Figure 4 Likewise, the light shielding layer 300 may not be formed in the entire region.

[0074] Therefore, in this embodiment, the light-shielding layer 300 having different dielectric constants of the first black matrix 311 and the second black matrix 312 is formed to compensate for the difference in touch sensitivity between the first non-luminous area 11 and the second non-luminous area 12, thereby achieving a structure that ensures stable touch operation.

[0075] As described above, with the help of the organic light-emitting display device and the manufacturing method thereof according to the embodiments of the present invention, the problem of differences in touch sensitivity between various parts is compensated by differentiating the dielectric constant of the light-shielding layer, thereby making the touch operation smooth, and ultimately achieving the effect of improving the performance and reliability of the product.

[0076] Although the present invention is described with reference to the embodiments shown in the accompanying drawings, they are only exemplary, and a technician with ordinary knowledge in the corresponding field can understand that various modifications and variations of the embodiments can be made accordingly. Therefore, the true technical protection scope of the present invention should be determined according to the technical ideas of the scope of the claims recorded.

Claims

1. An organic light emitting display device, wherein: include: The display layer includes a light-emitting area, a first non-light-emitting area having a pixel-defining film surrounding the light-emitting area, and a second non-light-emitting area; a light shielding layer, provided with a first black matrix and a second black matrix covering the first non-luminescent area and the second non-luminescent area respectively; The touch screen layer includes touch electrodes arranged at positions corresponding to the first black matrix and the second black matrix. The pixel defining film in the second non-luminous area is further provided with a spacer, while the pixel defining film in the first non-luminous area is not provided with a spacer. The dielectric constants of the first black matrix and the second black matrix are different from each other.

2. The organic light emitting display device according to claim 1, wherein: The touch screen layer is arranged on the display layer, and the light shielding layer is arranged on the touch screen layer.

3. The organic light emitting display device according to claim 2, wherein: The dielectric constant of the second black matrix is ​​greater than the dielectric constant of the first black matrix.

4. The organic light emitting display device according to claim 1, wherein: The light shielding layer is arranged on the display layer, and the touch screen layer is arranged on the light shielding layer.

5. The organic light emitting display device according to claim 4, wherein: The dielectric constant of the first black matrix is ​​greater than the dielectric constant of the second black matrix.

6. The organic light emitting display device according to claim 1, wherein: A transparent organic film covering the light emitting area is also provided on the light shielding layer.

7. The organic light emitting display device according to claim 6, wherein: The transparent organic film covers the first black matrix and also covers the second black matrix.

8. The organic light emitting display device according to claim 6, wherein: The transparent organic film covers the first black matrix but does not cover the second black matrix.

9. The organic light emitting display device according to claim 1, wherein: A moisture blocking layer is also provided to prevent the display layer from being wetted.

10. The organic light emitting display device according to claim 1, wherein: include: The display layer includes a light-emitting layer arranged in the light-emitting region, a pixel electrode and a counter electrode arranged opposite to each other with the light-emitting layer sandwiched therebetween, The counter electrode is arranged via the light emitting region and the first and second non-light emitting regions.

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