An OLED structure
By setting a directional blocking layer made of photodeformable material on a CMOS substrate, and using ultraviolet light expansion to block the unbroken anode layer, the problem of inter-pixel color crossing in silicon-based OLED products is solved, improving product yield and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI SEMICON INTEGRATED DISPLAY TECH CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-19
AI Technical Summary
In existing high-ppi silicon-based OLED full-color products, the anode layer between pixels is not completely etched away, resulting in color crosstalk between pixels, which reduces product yield and increases costs.
An oriented blocking layer is set on the top passivation layer of the CMOS substrate. The oriented blocking structure is made of photodeformable material and expands under ultraviolet light to block the unbroken anode layer. The structure is simple and effective.
This reduces color bleeding between pixels, improves product yield, and lowers costs.
Smart Images
Figure CN224386069U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of OLED display technology, and in particular to an OLED structure. Background Technology
[0002] Compared to traditional AMOLED display technology, silicon-based OLED microdisplays, using single-crystal silicon chips as a substrate and leveraging mature CMOS processes, achieve smaller pixel sizes and higher integration, making them widely popular for their ability to create near-eye display products comparable to large-screen displays. Based on its technological advantages and vast market potential, silicon-based OLED microdisplays are poised to usher in a new wave of near-eye displays in both military and consumer electronics fields, bringing users an unprecedented visual experience.
[0003] Existing high-ppi silicon-based OLED full-color products have anode pixels that are very close together, resulting in some pixels having unetched anode layers that fail to separate. This leads to color bleeding between pixels when the product is lit, reducing yield and causing significant cost losses. For example, patent CN116096165A discloses an organic electroluminescent display panel, which includes: a substrate; multiple anodes disposed on the substrate with gaps between adjacent anodes; a blocking layer, at least partially disposed at the gaps; and a light-emitting functional layer disposed on the side of the anodes facing away from the substrate. The blocking layer has protrusions, and at least part of the light-emitting functional layer is disconnected at the protrusions. The surface of the blocking layer facing away from the substrate does not exceed the surface of the light-emitting functional layer facing away from the substrate. This method requires first fabricating spaced anodes and then placing the blocking layer between adjacent anodes, making the manufacturing process relatively complex. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides an OLED structure that is simple in structure and can reduce color crosstalk between pixels.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] The OLED structure includes a CMOS substrate and an anode layer and a pixel definition layer disposed above the CMOS substrate. An orientation blocking layer for blocking the anode layer is directly disposed on the CMOS substrate. The orientation blocking layer is a blocking structure that expands under ultraviolet light irradiation.
[0007] Further or preferred:
[0008] The top layer of the CMOS substrate is a passivation layer, on which an oriented blocking layer is first fabricated and then an anode layer is fabricated.
[0009] The anode layer includes an anode body layer and a misalignment layer, with the misalignment layer and the directional blocking layer being provided accordingly.
[0010] The directional blocking layer is a layered structure of photodeformable material.
[0011] The anode layer includes a first anode layer and a second anode layer, with the second anode layer disposed on the first anode layer and the pixel definition layer disposed on the second anode layer. The first anode layer and the second anode layer are misaligned at the same position.
[0012] The directional blocking layer has a pointed or wavy shape.
[0013] It also includes an encapsulation layer, wherein the directional blocking layer, the misalignment layer of the first anode layer, the misalignment layer of the second anode layer, and the encapsulation layer are arranged sequentially from the inside to the outside.
[0014] Compared with the prior art, this utility model has the following advantages:
[0015] The OLED structure is reasonably designed. A directional blocking structure is set on the top passivation layer of the CMOS substrate to block the first anode layer and the second anode layer. The directional blocking structure can be directly set on the substrate, which is simple. Under ultraviolet light, it can expand upwards and break the unbroken part of the first or second anode layer, thereby reducing cross-color between pixels. Attached Figure Description
[0016] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:
[0017] Figure 1 This is a schematic diagram of the OLED structure of this utility model.
[0018] Figure 2 This is a schematic diagram of the manufacturing process of the structure of this utility model.
[0019] In the picture:
[0020] 1. CMOS substrate, 2. First anode layer, 3. Second anode layer, 4. Pixel definition layer, 5. Light-emitting layer, 6. Encapsulation layer, 7. Orientation blocking layer. Detailed Implementation
[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and through the description of the examples.
[0022] like Figure 1 and Figure 2As shown, the OLED structure includes a CMOS substrate 1 and an anode layer, a pixel definition layer 4, a light-emitting layer 5, and an encapsulation layer 6 disposed on the CMOS substrate 1; an orientation blocking layer 7 for blocking the anode layer is directly disposed on the CMOS substrate, and the positioning blocking layer is a blocking structure that expands under ultraviolet light irradiation.
[0023] CMOS substrate 1 is a CMOS silicon substrate; such as Figure 2 As shown, the top layer of the CMOS substrate 1 is a passivation layer. An orientation blocking layer is first fabricated on the passivation layer, followed by an anode layer. The anode layer includes an anode body layer and a misalignment layer, which are correspondingly arranged.
[0024] Furthermore, the anode layer includes a first anode layer 2 and a second anode layer 3, with the second anode layer disposed on the first anode layer and the pixel definition layer disposed on the second anode layer. The first anode layer and the second anode layer are misaligned at the same position.
[0025] This utility model has a reasonable OLED structure design. A directional blocking structure for blocking the first anode layer and the second anode layer is provided on the uppermost passivation layer of the CMOS substrate. The directional blocking structure can be directly set on the substrate, and the structure is simple. Under ultraviolet light irradiation, it can expand upwards, thereby breaking the unbroken part of the first or second anode layer, which can reduce color crosstalk between pixels.
[0026] The directional blocking layer 7 is a layer structure of photodeformable material, which can be fabricated by methods such as coating, spin coating, or inkjet printing. The shape of the directional structure is not limited, but it is preferred that the directional blocking layer has a sharp-angled or wavy shape for better blocking effect.
[0027] The photodeformable material can be an azophenyl compound, which can expand upwards under ultraviolet light, thereby breaking the unbroken parts of the first anode layer and / or the second anode layer. Then, under green light, the photodeformable material can return to its original state.
[0028] like Figure 1 As shown, the directional blocking layer, the misalignment layer of the first anode layer, the misalignment layer of the second anode layer, and the encapsulation layer are arranged sequentially from the inside out; the directional blocking structure can at least block the connection between pixels in the first anode layer or the second anode layer, reduce the generation of cross-color between pixels, thereby reducing the generation of pixel dark spots and improving the display effect.
[0029] The above description is only a preferred embodiment of the present utility model. The above technical features can be arbitrarily combined to form multiple embodiments of the present utility model.
[0030] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.
Claims
1. An OLED structure, comprising a CMOS substrate and an anode layer and a pixel definition layer disposed above the CMOS substrate, characterized in that: A directional blocking layer for blocking the anode layer is directly disposed on the CMOS substrate. The directional blocking layer is a blocking structure that expands under ultraviolet light irradiation.
2. The OLED structure as described in claim 1, characterized in that: The top layer of the CMOS substrate is a passivation layer, on which an oriented blocking layer is first fabricated and then an anode layer is fabricated.
3. The OLED structure as described in claim 1, characterized in that: The anode layer includes an anode body layer and a misalignment layer, with the misalignment layer and the directional blocking layer being provided accordingly.
4. The OLED structure as described in claim 3, characterized in that: The directional blocking layer is a layered structure of photodeformable material.
5. The OLED structure as described in claim 3, characterized in that: The anode layer includes a first anode layer and a second anode layer, with the second anode layer disposed on the first anode layer and the pixel definition layer disposed on the second anode layer. The first anode layer and the second anode layer are misaligned at the same position.
6. The OLED structure as described in claim 5, characterized in that: The directional blocking layer has a pointed or wavy shape.
7. The OLED structure as described in claim 5, characterized in that: It also includes an encapsulation layer, wherein the directional blocking layer, the misalignment layer of the first anode layer, the misalignment layer of the second anode layer, and the encapsulation layer are arranged sequentially from the inside to the outside.