OLED display screen brightening adhesive tape

Abstract

The utility model discloses an OCA (Optical Clear Adhesive) brightening adhesive tape for an OLED (Organic Light Emitting Diode) display screen, which relates to the technical field of adhesive tapes and comprises an anti-fingerprint oleophobic coating, a toughening layer, a blue light blocking layer, an anti-reflection layer, a transparent substrate layer, an OCA optical adhesive layer and a release layer which are sequentially laminated from top to bottom. The blue light blocking layer comprises a nano silicon dioxide adhesive layer, a nano cerium dioxide adhesive layer, a nano potassium fluoride adhesive layer and a nano titanium dioxide adhesive layer which are sequentially arranged from top to bottom. The utility model provides an anti-fingerprint oil stain anti-reflection OLED (Organic Light Emitting Diode) display screen OCA (Optical Clear Adhesive) brightening adhesive tape which has blue light blocking, anti-reflection and waterproof properties, is applied to a display touch screen of electronic equipment, and can reduce light reflection between a display screen and glass and enhance the definition of the screen.

Description

Technical Field

[0001] The utility model relates to the technical field of adhesive tapes, in particular to an OLED display screen brightening adhesive tape. Background Art

[0002] OLED (Organic Light-Emitting Diode), also known as organic electric laser display, organic light-emitting semiconductor. OLED is a current-type organic light-emitting device that emits light through the injection and recombination of carriers.

[0003] Organic light-emitting diode (OLED) electronic liquid crystal displays are now popular electronic products and are widely used in various devices, such as smart phones, tablet computers, televisions, computer monitors, electronic shelf labels, e-books and digital signage, as well as indoor signage and display cabinets. During use, the display surface of such electronic displays has the disadvantage of surface reflection. When the angle of light illumination is appropriate, strong light will be generated due to reflection, which will cause the human eye to be unable to see objects clearly due to stimulation for a short time, affecting the visual experience and also affecting normal use, which prevents consumers from capturing all the information provided by the display surface. This problem often occurs in daily life, so it is necessary to reduce reflection to brighten electronic display devices with OLED displays.

[0004] Adhesive tape is composed of two parts: base material and adhesive. It connects two or more unconnected objects together through bonding. Adhesive tape has been fully integrated into all walks of life and people's daily life. Adhesive tape can be divided into: high temperature tape, double-sided tape, insulating tape, special tape, pressure-sensitive tape, die-cutting tape, masking tape, etc. according to its function. Different functions are suitable for different industry needs. There are many types and wide applications.

[0005] OCA (Optically Clear Adhesive) OCA optical adhesive is a special adhesive used to bond transparent optical components (such as lenses, etc.). OCA optical adhesive is one of the important raw materials for touch screens. It is made by making optical acrylic adhesive into an OCA film without a substrate, and then laminating a layer of release film (heavy release film and light release film) on the upper and lower substrates. It is a double-sided laminating tape without a substrate material.

[0006] OLED is an emerging electronic display technology that is highly anticipated due to its high luminous efficiency. OLED is also used in the lighting industry because it reduces power consumption. However, the emitted light is reflected inward at the OLED / glass boundary, or the light from this boundary is reflected inward again at the glass / air boundary. Therefore, almost 80% of the emitted light is inside the device, and only 20% of the light is emitted to the outside. Therefore, it is urgent to provide an adhesive tape that is widely used in electronic device display touch screens to reduce the reflection between the display and the glass and enhance the screen clarity.

[0007] Moreover, the OLED display itself emits blue light with a wavelength shorter than natural light. Long-term use can easily cause visual fatigue, damage the retina of the human eye, and affect vision. When users use it, their fingers will be contaminated by fingerprints and oil, which will affect the display effect of the OLED display. It is necessary to prevent fingerprints and oil to achieve a brightening effect. Utility Model Content

[0008] In view of the shortcomings of the prior art, the utility model provides an anti-fingerprint, oil-stain and anti-reflective OLED display brightening tape with the properties of blocking blue light, anti-reflection and water-proofing. The tape is applied to the display touch screen of electronic equipment to reduce the reflection between the display screen and the glass and enhance the screen clarity.

[0009] The utility model also provides an OLED display screen brightening tape, comprising: an anti-fingerprint oleophobic coating, a toughening layer, a blue light blocking layer, an anti-reflection layer, a transparent base layer, an OCA optical adhesive layer and a release layer stacked in sequence from top to bottom, characterized in that the blue light blocking layer comprises a nano silica gel layer, a nano cerium dioxide adhesive layer, a nano potassium fluoride adhesive layer and a nano titanium dioxide adhesive layer arranged in sequence from top to bottom.

[0010] According to the OLED display screen brightening tape, the anti-reflection layer includes a first anti-reflection layer and a second anti-reflection layer connected to each other up and down, the upper surface of the first anti-reflection layer is connected to the toughening layer, the lower surface of the second anti-reflection layer is connected to the blue light blocking layer, the first anti-reflection layer is provided with a plurality of first through holes, the second anti-reflection layer is provided with a plurality of second through holes, the center lines of the first through holes coincide with the center lines of the second through holes, and the aperture of the first through hole is smaller than the aperture of the second through hole.

[0011] According to the OLED display screen brightening tape, the anti-reflection layer includes a backing layer and a transparent resin layer, the backing layer is polyethylene terephthalate (PET), the transparent resin layer may include an optically transparent adhesive, the transparent resin layer is coated on the upper surface of the backing layer, and the backing layer and the transparent resin layer are located between the first anti-reflection layer and the second anti-reflection layer, and the thickness of the anti-reflection layer is 0.5 to 3 μm.

[0012] According to the OLED display screen brightening tape, the first anti-reflection layer and the second anti-reflection layer can also be a double-layer structure specifically including a backing layer and a transparent resin layer, the backing layer is polyethylene terephthalate, the transparent resin layer may include an optically transparent adhesive, the transparent resin layer is coated on the upper surface of the backing layer, and the backing layer and the transparent resin layer are located between the first anti-reflection layer and the second anti-reflection layer, and the thickness of the anti-reflection layer is 0.5 to 3 μm.

[0013] According to the OLED display screen brightness enhancement tape, the transparent resin layer contains anti-reflection transparent particles, and the anti-reflection transparent particles include transparent glass material, single crystal or transparent synthetic resin.

[0014] According to the OLED display screen brightness enhancement tape, the transparent base layer is an optical-grade PET film, PC film, PBT film or PEN film with a light transmittance greater than 90% and a haze less than 1%.

[0015] According to the OLED display screen brightness enhancement tape, the toughening layer is a transparent silicone layer.

[0016] According to the OLED display screen brightness enhancement tape, the OCA optical adhesive layer is an optical acrylate pressure-sensitive adhesive, an optical silicone pressure-sensitive adhesive or a rubber pressure-sensitive adhesive.

[0017] According to the OLED display screen brightness enhancement tape, the thickness of the OCA optical adhesive layer is 10 to 60 μm.

[0018] According to the OLED display screen brightening tape, the anti-fingerprint oleophobic coating is a nano titanium dioxide coating.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 This is a structural diagram of a front-view of an OLED display screen brightening tape according to the utility model;

[0022] Figure 2 for Figure 1 A magnified view of the structure at center;

[0023] Figure 3 This is a structural diagram of a transparent resin layer of an OLED display screen brightening tape according to the utility model;

[0024] Figure 4This is a structural diagram of an anti-reflection layer of an OLED display screen brightening tape according to the utility model;

[0025] Figure 5 This is a schematic diagram of the structure in Example 2.

[0026] Legend:

[0027] 1. Anti-fingerprint oleophobic coating; 2. Toughening layer; 3. Blue light blocking layer; 301. Nano silica gel layer; 302. Nano cerium dioxide adhesive layer; 303. Nano potassium fluoride adhesive layer; 304. Nano titanium dioxide adhesive layer; 4. Anti-reflection layer; 401. First anti-reflection layer; 402. Second anti-reflection layer; 4011. First through hole; 4021. Second through hole; 403. Backing layer; 404. Transparent resin layer; 4041. Anti-reflection transparent particles; 5. Transparent base layer; 6. OCA optical adhesive layer; 7. Release layer. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0029] Example 1

[0030] Reference Figure 1-4 The utility model embodiment is a OLED display screen brightening tape, which includes: an anti-fingerprint oleophobic coating 1, a toughening layer 2, a blue light blocking layer 3, an anti-reflection layer 4, a transparent base layer 5, an OCA optical adhesive layer 6 and a release layer 7 stacked in sequence from top to bottom, and the blue light blocking layer 3 includes a nano silica gel layer 301, a nano cerium dioxide adhesive layer 302, a nano potassium fluoride adhesive layer 303 and a nano titanium dioxide adhesive layer 304 arranged in sequence from top to bottom. The anti-fingerprint oleophobic coating 1, the anti-reflection layer 4 and the blue light blocking layer 3 are arranged so that the tape has anti-fingerprint oil stain, anti-reflection and anti-blue light properties. The blue light blocking layer 3 is composited by multiple nano adhesive layers, which improves the blue light blocking performance.

[0031] Furthermore, the anti-reflection layer 4 includes a first anti-reflection layer 401 and a second anti-reflection layer 402 which are connected to each other from top to bottom. The upper surface of the first anti-reflection layer 401 is connected to the toughening layer 2, and the lower surface of the second anti-reflection layer 402 is connected to the blue light blocking layer 3. The first anti-reflection layer 401 is provided with a plurality of first through holes 4011, and the second anti-reflection layer 402 is provided with a plurality of second through holes 4021. The center lines of the first through holes 4011 and the second through holes 4021 coincide with each other, and the aperture of the first through holes 4011 is smaller than that of the second through holes 4021. The first through holes 4011 and the second through holes 4021 are provided on the anti-reflection layer, and the aperture of the first through holes 4011 is smaller than that of the second through holes 4021, so that the anti-reflection material has more three-dimensional space for free reflection. The light is diffusely reflected in the anti-glare layer, but at the same time, part of it can penetrate, thereby improving the anti-reflection effect without affecting the optical transmittance. The anti-reflection layer can be formed by screen printing, spraying, sputtering, coating and other process methods.

[0032] Furthermore, the anti-reflection layer 4 includes a backing layer 403 and a transparent resin layer 404, the backing layer 403 is polyethylene terephthalate (PET), the transparent resin layer 404 may include an optically transparent adhesive, the transparent resin layer 404 is coated on the upper surface of the backing layer 403, and the backing layer 403 and the transparent resin layer 404 are located between the first anti-reflection layer 401 and the second anti-reflection layer 402, and the thickness of the anti-reflection layer 4 is 0.5 to 3 μm.

[0033] Furthermore, the transparent resin layer 404 contains anti-reflection transparent particles 4041, which include transparent glass materials, single crystals or transparent synthetic resins. The anti-reflection transparent particles 4041 can be existing commercial particles, and their particle size should be controlled within a certain range. Nano-scale particles are preferred, and nano-scale materials can ensure good light transmittance of the material. The intercrystalline interface formed by the anti-reflection transparent particles 4041 will reflect in different directions when irradiated with light, and will not form a strong light beam facing a certain direction, which can produce an anti-reflection brightening effect. Therefore, the comprehensive performance not only ensures light transmittance, but also has an anti-reflection brightening effect.

[0034] Furthermore, the transparent base layer of the transparent substrate layer 5 is an optical-grade PET film, PC film, PBT film or PEN film with a light transmittance greater than 90% and a haze less than 1%.

[0035] Furthermore, the toughening layer 2 is a transparent silicone layer. The toughening layer 2 can play a buffering role, and the particles of the anti-reflection layer can achieve better adhesion and arrangement under the action of the toughening layer 2, which is conducive to the anti-reflection effect.

[0036] Furthermore, the OCA optical adhesive layer 6 is an optical acrylate pressure-sensitive adhesive, an optical silicone pressure-sensitive adhesive or a rubber pressure-sensitive adhesive.

[0037] Furthermore, the thickness of the OCA optical adhesive layer 6 is 10-60 μm.

[0038] Furthermore, the anti-fingerprint oleophobic coating 1 is a nano-titanium dioxide coating. The nano-titanium dioxide coating has super oleophobicity, which makes it difficult for oil to adhere. At the same time, the nano-titanium dioxide coating also has a self-cleaning effect, and is suitable for use on an outer screen or a touch screen.

[0039] Example 2

[0040] The difference between this embodiment and embodiment 1 is that in embodiment 1, the backing layer 403 and the transparent resin layer 404 are located between the first anti-reflection layer 401 and the second anti-reflection layer 402, while in this embodiment, the first anti-reflection layer 401 and the second anti-reflection layer 402 are both a double-layer structure, that is, the first anti-reflection layer 401 and the second anti-reflection layer 402 are both composed of a double-layer structure of the backing layer 403 and the transparent resin layer 404.

[0041] Specifically, Figure 5 As shown, the first anti-reflection layer 401 and the second anti-reflection layer 402 are a double-layer structure, specifically including a backing layer 403 and a transparent resin layer 404. The backing layer 403 is polyethylene terephthalate PET, and the transparent resin layer 404 may include an optically transparent adhesive. The transparent resin layer 404 is coated on the upper surface of the backing layer 403, and the thickness of the anti-reflection layer 4 is 0.5 to 3 μm.

[0042] Working principle: When used for the first time, by setting the anti-fingerprint oleophobic coating, anti-reflective layer and blue light blocking layer in the tape, when the tape is used on various OLED electronic display screens and touch screens, it can play the role of anti-fingerprint oil stains, anti-reflection and anti-blue light. It can also be used as a film for vehicle rearview mirrors to achieve anti-reflection function, while preventing water droplets from adhering to the mirror surface, thereby improving display clarity; the structure of the anti-reflection layer improves the anti-reflection effect while ensuring light transmittance; the multi-layer structure of the blue light blocking layer improves the blue light blocking performance; the anti-fingerprint oleophobic coating also has anti-scratch performance and self-cleaning function, which is suitable for various occasions; the toughening layer can play a buffering role, on the one hand, it can ensure the anti-reflection performance of the anti-reflection material, and on the other hand, it can improve the overall tensile and impact resistance of the tape.

[0043] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An OLED display screen brightening tape, comprising: An anti-fingerprint oleophobic coating (1), a toughening layer (2), a blue light blocking layer (3), an anti-reflection layer (4), a transparent base layer (5), an OCA optical adhesive layer (6) and a release layer (7) are sequentially stacked from top to bottom, characterized in that the blue light blocking layer (3) comprises a nano silica gel layer (301), a nano cerium dioxide adhesive layer (302), a nano potassium fluoride adhesive layer (303) and a nano titanium dioxide adhesive layer (304) sequentially arranged from top to bottom.

2. The OLED display screen brightness enhancement tape according to claim 1, characterized in that: The anti-reflection layer (4) comprises a first anti-reflection layer (401) and a second anti-reflection layer (402) which are connected to each other from top to bottom, the upper surface of the first anti-reflection layer (401) is connected to the toughening layer (2), and the lower surface of the second anti-reflection layer (402) is connected to the blue light blocking layer (3), a plurality of first through holes (4011) are arranged on the first anti-reflection layer (401), and a plurality of second through holes (4021) are arranged on the second anti-reflection layer (402), the center lines of the first through holes (4011) and the second through holes (4021) coincide with each other, and the aperture of the first through hole (4011) is smaller than the aperture of the second through hole (4021).

3. The OLED display screen brightness enhancement tape according to claim 1, characterized in that: The anti-reflection layer (4) comprises a backing layer (403) and a transparent resin layer (404), wherein the backing layer (403) is polyethylene terephthalate (PET), and the transparent resin layer (404) may comprise an optically transparent adhesive, wherein the transparent resin layer (404) is coated on the upper surface of the backing layer (403), and the backing layer (403) and the transparent resin layer (404) are located between the first anti-reflection layer (401) and the second anti-reflection layer (402), and the thickness of the anti-reflection layer (4) is 0.5 to 3 μm.

4. The OLED display screen brightness enhancement tape according to claim 2, characterized in that: The first anti-reflection layer (401) and the second anti-reflection layer (402) may also be a double-layer structure, specifically including a backing layer (403) and a transparent resin layer (404), wherein the backing layer (403) is polyethylene terephthalate (PET), and the transparent resin layer (404) may include an optically transparent adhesive, and the transparent resin layer (404) is coated on the upper surface of the backing layer (403), and the backing layer (403) and the transparent resin layer (404) are located between the first anti-reflection layer (401) and the second anti-reflection layer (402), and the thickness of the anti-reflection layer (4) is 0.5 to 3 μm.

5. The OLED display screen brightness enhancement tape according to claim 3 or 4, characterized in that: The transparent resin layer (404) contains anti-reflection transparent particles (4041).

6. The OLED display screen brightness enhancement tape according to claim 1, characterized in that: The transparent base layer (5) is an optical-grade PET film, PC film, PBT film or PEN film with a light transmittance greater than 90% and a haze less than 1%.

7. The OLED display screen brightness enhancement tape according to claim 1, characterized in that: The toughening layer (2) is a transparent silicone layer.

8. The OLED display screen brightness enhancement tape according to claim 1, characterized in that: The OCA optical adhesive layer (6) is an optical acrylate pressure-sensitive adhesive, an optical silicone pressure-sensitive adhesive or a rubber pressure-sensitive adhesive.

9. The OLED display screen brightness enhancement tape according to claim 1, characterized in that: The thickness of the OCA optical adhesive layer (6) is 10 to 60 μm.

10. The OLED display screen brightness enhancement tape according to claim 1, characterized in that: The anti-fingerprint oleophobic coating (1) is a nano titanium dioxide coating.

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