A multi-layer ink structure, flexible screen and display device

Abstract

The utility model relates to display screen technical field especially relates to a multilayer ink structure, flexible screen and display equipment, multilayer ink structure includes first ink layer, sets up on flexible screen, and first ink layer is provided with first openwork at the position department of corresponding flexible screen's bending area, second ink layer, sets up on first ink layer, and second ink layer is provided with second openwork at the position department of corresponding flexible screen's bending area, and third ink layer, sets up on second ink layer, and third ink layer is provided with third openwork at the position department of corresponding flexible screen's bending area, this multilayer ink structure, flexible screen and display equipment can solve the problem that the flexible screen of current display equipment is easy to occur light transmission anomaly in bending area.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a multi-layer ink structure, a flexible screen, and a display device. Background Technology

[0002] Currently in the laptop industry, foldable laptop screens suffer from uneven light transmission in the bending area, severely impacting product performance and aesthetics. Therefore, the bending area of ​​flexible screens places higher demands on screen printing inks.

[0003] Currently, the screen printing process for PI substrate inks in flexible displays employs a double-layer screen printing procedure. In this type of screen printing ink structure, during production, BM1 ink is initially adjusted to match the module color to achieve the initial light-blocking requirement. Then, BM2 ink is screen printed to achieve the final light-blocking effect and protect the underlying ink layer. Furthermore, a misalignment needs to be established between BM1 and BM2 inks to prevent air bubbles from forming during module bonding. Therefore, in the bending area, the edge of the BM2 ink needs to maintain a certain distance from the BM1 ink.

[0004] However, during long-term bending, the ink layers of BM1 and BM2 inks may crack, delaminate, or even fall off under stress concentration, leading to problems such as abnormal light transmission. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a multi-layer ink structure, a flexible screen, and a display device to solve the problem that abnormal light transmission easily occurs in the bending area of ​​the flexible screen of existing display devices.

[0006] According to a first aspect of the present invention, a multi-layer ink structure is provided, wherein the multi-layer ink structure includes: a first ink layer disposed on the flexible screen, the first ink layer having a first hollow portion at a position corresponding to the bending area of ​​the flexible screen; a second ink layer disposed on the first ink layer, the second ink layer having a second hollow portion at a position corresponding to the bending area of ​​the flexible screen; and a third ink layer disposed on the second ink layer, the third ink layer having a third hollow portion at a position corresponding to the bending area of ​​the flexible screen.

[0007] Preferably, the ends of the first ink layer, the second ink layer, and the third ink layer are staggered in the bending area.

[0008] Preferably, the end of the second ink layer extends beyond the end of the first ink layer by a first preset distance, and the end of the third ink layer extends beyond the end of the second ink layer by a second preset distance.

[0009] Preferably, the first preset distance and the second preset distance are between 10 μm and 80 μm.

[0010] Preferably, the first ink layer is a basic light-shielding layer, the second ink layer is a full-shielding layer, and the third ink layer is a protective layer, with the thickness of the first ink layer, the second ink layer, and the third ink layer being 2 μm to 10 μm.

[0011] Preferably, the first ink layer has a transmittance of ≤30% for light in the 500nm band; the second ink layer has a transmittance of ≤5% for light in the 550nm band; the third ink layer has a transmittance of <2% for light in the 550nm band and a transmittance of >90% for light in the 940nm band.

[0012] Preferably, the first hollow portion, the second hollow portion, and the third hollow portion are multiple wave-shaped hollow structures arranged side by side, and the extension direction of the wave-shaped hollow structures is perpendicular to the bending direction of the flexible screen.

[0013] Preferably, the waveform cutout structure is a sine wave or a cosine wave, the wavelength of the waveform cutout structure is 1mm to 3mm, the amplitude of the waveform cutout structure is 0.1mm to 0.3mm, and the width of the first cutout portion, the second cutout portion and the third cutout portion in the bending direction of the flexible screen is >3mm.

[0014] According to a second aspect of the present invention, a flexible screen is provided, wherein the flexible screen includes a first non-bending area, a second non-bending area, a bending area, and a multi-layer ink structure as described above. The bending area is located between the first non-bending area and the second non-bending area. The first ink layer, the second ink layer, and the third ink layer are disposed on the bending area and the second non-bending area. The first ink layer has a first hollow portion at the bending area, the second ink layer has a second hollow portion at the bending area, and the third ink layer has a third hollow portion at the bending area.

[0015] According to a third aspect of the present invention, a display device is provided, wherein the display device includes a flexible screen as described above.

[0016] This utility model discloses a multi-layer ink structure, a flexible screen, and a display device, which includes a first ink layer, a second ink layer, and a third ink layer. Compared to existing double-layer screen printing processes, an additional ink layer is added to ensure a light-shielding effect. The first ink layer is disposed on the flexible screen, and a first cutout is provided at the bending area corresponding to the flexible screen. The second ink layer is disposed on the first ink layer, and a second cutout is provided at the bending area corresponding to the flexible screen. The third ink layer is disposed on the second ink layer, and a third cutout is provided at the bending area corresponding to the flexible screen. This arrangement effectively improves the adhesion of the ink layers and prevents stress concentration in the bending area from causing ink cracking and peeling, thus preventing light from passing through the multi-layer ink structure and avoiding abnormal light transmission of the flexible screen.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the flexible screen and multi-layer ink structure according to this utility model.

[0020] Reference numerals: 1-First ink layer; 11-First hollowed-out portion; 2-Second ink layer; 21-Second hollowed-out portion; 3-Third ink layer; 31-Third hollowed-out portion; 4-Flexible screen; 40-Bending area; 41-First non-bending area; 42-Second non-bending area. Detailed Implementation

[0021] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0022] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0023] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0024] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0025] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0026] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0027] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0028] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0029] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0030] like Figure 1 As shown, according to a first aspect of the present invention, a multi-layer ink structure is provided, the multi-layer ink structure including a first ink layer 1, a second ink layer 2 and a third ink layer 3.

[0031] In the following description, reference will be made to Figure 1 The specific structure of the above-mentioned components in the multi-layer ink structure and the connection relationship of the above-mentioned components are described in detail.

[0032] like Figure 1 As shown, in this embodiment, the first ink layer 1 can be screen-printed onto the flexible screen 4. The first ink layer 1 can have a first cutout 11 at the location corresponding to the bending area 40 of the flexible screen 4. The second ink layer 2 can be screen-printed onto the first ink layer 1. The second ink layer 2 can have a second cutout 21 at the location corresponding to the bending area 40 of the flexible screen 4. The third ink layer 3 can be screen-printed onto the second ink layer 2. The third ink layer 3 has a third cutout 31 at the location corresponding to the bending area 40 of the flexible screen 4. This configuration effectively improves the adhesion of the ink layers and prevents stress concentration in the bending area 40 from causing ink cracking and peeling. Compared to the existing double-layer screen printing process, the multi-layer ink structure adds an extra ink layer to ensure a light-shielding effect, thereby preventing abnormal light transmission from occurring on the flexible screen 4.

[0033] Preferred, such as Figure 1As shown, in this embodiment, the ends of the first ink layer 1, the second ink layer 2, and the third ink layer 3 can be staggered in the bending area 40. Specifically, the ends of the first ink layer 1, the second ink layer 2, and the third ink layer 3 are all located within the bending area 40. To avoid generating bubbles in the module bonding, a staggered size can be provided between the ends of the first ink layer 1, the second ink layer 2, and the third ink layer 3.

[0034] Furthermore, preferably, such as Figure 1 As shown, in this embodiment, the second ink layer 2 covers the first ink layer 1, and the end of the second ink layer 2 can be in a first direction (such as...). Figure 1 (as shown in the left direction) beyond the end of the first ink layer 1 by a first predetermined distance ( Figure 1 This is for illustrative purposes only. The position of the first cutout portion 11 indicates the position of the end of the first ink layer 1, and the position of the second cutout portion 21 indicates the position of the end of the second ink layer 2. The first preset distance is the misalignment size selected by the operator according to visual requirements.

[0035] Similarly, such as Figure 1 As shown, in this embodiment, the third ink layer 3 covers the second ink layer 2, and the end of the third ink layer 3 can be in a first direction (such as...). Figure 1 The second predetermined distance (as shown in the left direction) extends beyond the end of the second ink layer 2. Figure 1 The position of the third cutout 31 is shown to indicate the position of the end of the third ink layer 3. The second preset distance is also the misalignment size selected by the operator according to visual requirements.

[0036] Furthermore, preferably, such as Figure 1 As shown, in this embodiment, the first preset distance and the second preset distance can be from 10μm to 80μm. Specifically, the first preset distance can be equal to the second preset distance, for example, both the first and second preset distances are 80μm; the first preset distance can also be unequal to the second preset distance, for example, the first preset distance is 10μm and the second preset distance is 80μm. This setting ensures that the misalignment between the ends of the first ink layer 1, the second ink layer 2, and the third ink layer 3 is small, thus avoiding uneven light transmission at the step differences in the ink layers after the flexible screen 4 is bent.

[0037] Preferred, such as Figure 1As shown, in this embodiment, the first ink layer 1 is a basic light-shielding layer, the second ink layer 2 is a full-shielding layer, and the third ink layer 3 is a protective layer. The first ink layer 1 can be tinted according to the module color to initially achieve the light-shielding requirements. The second ink layer 2 is used to meet the final light-shielding requirements. The third ink layer 3 covers the second ink layer 2 and protects the underlying ink layers (i.e., the second ink layer 2 and the first ink layer 1).

[0038] Further, preferably, the thicknesses of the first ink layer 1, the second ink layer 2, and the third ink layer 3 are from 2 μm to 10 μm. The thicknesses of the first ink layer 1, the second ink layer 2, and the third ink layer 3 can all be equal, for example, the thicknesses of the first ink layer 1, the second ink layer 2, and the third ink layer 3 are all 2 μm. Alternatively, two of the first ink layer 1, the second ink layer 2, and the third ink layer 3 can be equal, for example, the thickness of the first ink layer 1 is 2 μm, the thickness of the second ink layer 2 is 6 μm, and the thickness of the third ink layer 3 is 10 μm.

[0039] Specifically, such as Figure 1 As shown, in this embodiment, the first ink layer 1 has a transmittance of ≤30% for light in the 500nm wavelength band, thus initially achieving the light-shielding requirement. The second ink layer 2 has a transmittance of ≤5% for light in the 550nm wavelength band, thus meeting the final light-shielding requirement. The third ink layer 3 has a transmittance of <2% for light in the 550nm wavelength band and a transmittance of >90% for light in the 940nm wavelength band, thus protecting the second ink layer 2 and the first ink layer 1.

[0040] In addition, preferred, such as Figure 1 As shown, in the embodiment, the first hollowed-out portion 11, the second hollowed-out portion 21, and the third hollowed-out portion 31 can all be multiple wave-shaped hollowed-out structures arranged side by side. The wave-shaped hollowed-out structure can be formed by hollowing out the surface of the ink layer into the interior of the ink layer to form a wave-shaped structure. Figure 1 The first hollowed-out portion 11, the second hollowed-out portion 21, and the third hollowed-out portion 31 are shown as a single wave-shaped hollowed-out structure for illustrative purposes. In actual production, the first hollowed-out portion 11, the second hollowed-out portion 21, and the third hollowed-out portion 31 can all include multiple wave-shaped hollowed-out structures. The extension direction of the wave-shaped hollowed-out structure (referring to the overall extension direction of the wave-shaped hollowed-out structure, specifically, as shown in the diagram) Figure 1 The vertical direction shown is perpendicular to the bending direction of the flexible screen 4 (as shown in the figure). Figure 1 (As shown in the horizontal direction). This ensures that when the flexible screen 4 is bent, the multiple wave-shaped cutouts can prevent stress concentration in the bending area 40 from causing ink cracking and peeling.

[0041] Specifically, such as Figure 1 As shown, in this embodiment, the waveform cutout structure can be a sine wave or a cosine wave (i.e., a simple harmonic wave). The wavelength of the waveform cutout structure can be 1mm to 3mm. The amplitude of the waveform cutout structure can be 0.1mm to 0.3mm. The width of the first cutout portion 11, the second cutout portion 21, and the third cutout portion 31 in the bending direction of the flexible screen 4 is >3mm.

[0042] In addition, such as Figure 1 As shown, according to a second aspect of this utility model, a flexible screen 4 is provided. The flexible screen 4 includes a first non-bending region 41, a second non-bending region 42, a bending region 40, and a multi-layer ink structure as described above. Specifically, the bending region 40 is disposed between the first non-bending region 41 and the second non-bending region 42, allowing the first non-bending region 41 and the second non-bending region 42 to be bent around the bending region 40, thereby achieving the folding of the flexible screen 4. The first ink layer 1, the second ink layer 2, and the third ink layer 3 can be disposed on the bending region 40 and the second non-bending region 42, that is, the ends of the first ink layer 1, the second ink layer 2, and the third ink layer 3 are disposed on the bending region 40 and extend towards the second non-bending region 42. The first ink layer 1 has a first hollow portion 11 at the bending area 40, the second ink layer 2 has a second hollow portion 21 at the bending area 40, and the third ink layer 3 has a third hollow portion 31 at the bending area 40, so as to avoid stress concentration in the bending area 40 causing the ink to crack and fall off.

[0043] During use, the flexible screen 4 is screen-printed with a first ink layer 1, a second ink layer 2, and a third ink layer 3. This adds an extra ink layer compared to existing double-layer screen printing processes to ensure a light-blocking effect. Specifically, the first ink layer 1 is applied to the flexible screen 4, and a first cutout 11 is provided at the location corresponding to the bending area 40 of the flexible screen 4. The second ink layer 2 is applied to the first ink layer 1, and a second cutout 21 is provided at the location corresponding to the bending area 40 of the flexible screen 4. The third ink layer 3 is applied to the second ink layer 2, and a third cutout 31 is provided at the location corresponding to the bending area 40 of the flexible screen 4. This arrangement effectively improves the adhesion of the ink layers and prevents stress concentration in the bending area 40 from causing ink cracking and peeling, which would allow light to pass through the multi-layer ink structure, thus preventing abnormal light transmission from the flexible screen 4.

[0044] Furthermore, according to a third aspect of this utility model, a display device is provided, which includes the flexible screen 4 as described above. The display device can be a product such as a laptop computer, mobile phone, or tablet computer having the flexible screen 4. The display device has the same beneficial effects as the flexible screen 4 described above, and will not be repeated here.

[0045] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multi-layer ink structure disposed on a flexible screen, characterized in that, The multilayer ink structure includes: A first ink layer is disposed on the flexible screen, and a first cutout portion is provided in the first ink layer at the position corresponding to the bending area of ​​the flexible screen; A second ink layer is disposed on the first ink layer, and the second ink layer has a second cutout portion at the position corresponding to the bending area of ​​the flexible screen; and A third ink layer is disposed on the second ink layer, and the third ink layer has a third hollow portion at the position corresponding to the bending area of ​​the flexible screen.

2. The multilayer ink structure according to claim 1, characterized in that, The ends of the first ink layer, the second ink layer, and the third ink layer are staggered in the bending area.

3. The multilayer ink structure according to claim 2, characterized in that, The end of the second ink layer extends beyond the end of the first ink layer by a first preset distance, and the end of the third ink layer extends beyond the end of the second ink layer by a second preset distance.

4. The multilayer ink structure according to claim 3, characterized in that, The first preset distance and the second preset distance are between 10 μm and 80 μm.

5. The multilayer ink structure according to claim 1, characterized in that, The first ink layer is a basic light-shielding layer, the second ink layer is a full-shielding layer, and the third ink layer is a protective layer. The thickness of the first ink layer, the second ink layer, and the third ink layer is 2 μm to 10 μm.

6. The multilayer ink structure according to claim 5, characterized in that, The first ink layer has a transmittance of ≤30% for light in the 500nm band; the second ink layer has a transmittance of ≤5% for light in the 550nm band; the third ink layer has a transmittance of <2% for light in the 550nm band and a transmittance of >90% for light in the 940nm band.

7. The multilayer ink structure according to claim 1, characterized in that, The first, second, and third hollow portions are multiple wave-shaped hollow structures arranged side by side, and the extension direction of the wave-shaped hollow structures is perpendicular to the bending direction of the flexible screen.

8. The multilayer ink structure according to claim 7, characterized in that, The waveform cutout structure is a sine wave or a cosine wave, the wavelength of the waveform cutout structure is 1mm to 3mm, the amplitude of the waveform cutout structure is 0.1mm to 0.3mm, and the width of the first cutout portion, the second cutout portion and the third cutout portion in the bending direction of the flexible screen is >3mm.

9. A flexible screen, characterized in that, The flexible screen includes a first non-bending area, a second non-bending area, a bending area, and a multi-layer ink structure as described in any one of claims 1 to 8. The bending area is located between the first non-bending area and the second non-bending area. The first ink layer, the second ink layer, and the third ink layer are disposed on the bending area and the second non-bending area. The first ink layer has a first hollow portion at the bending area, the second ink layer has a second hollow portion at the bending area, and the third ink layer has a third hollow portion at the bending area.

10. A display device, characterized in that, The display device includes the flexible screen as described in claim 9.

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