A tempered film capable of blocking blue light and exciting red light

Abstract

This invention discloses a tempered glass film that blocks blue light and excites red light, comprising high-aluminum triple-strength glass, high-transparency OCA, photo-excited carbon quantum dot coating, blue light blocking coating, high-transparency PET substrate, silicone layer, and PET release film. This invention not only excites red light but also effectively blocks blue light. It utilizes the 380nm wavelength violet light emitted by the screen to excite red light in the 620-700nm wavelength range, which is beneficial to the eyes, while simultaneously blocking blue light emitted by the screen in the 435-440nm wavelength range. This achieves both eye protection and the protection against harmful blue light, realizing the dual functions of red light excitation and blue light blocking, providing more comprehensive eye protection. Furthermore, addressing the issue of excessively high color temperature in red light films on the market, this invention employs carbon quantum dot technology, achieving a transmittance of over 90%, consistent with materials such as PET and glass. It is completely transparent in its unexcited state, without affecting the screen's color performance.

Description

Technical Field

[0001] This invention relates to the field of mobile phone protective film technology, specifically a tempered glass film that blocks blue light and excites red light. Background Technology

[0002] With the widespread use of smartphones, the importance of the phone screen as the primary interface for user interaction is self-evident. However, phone screens are easily damaged by scratches and impacts, which not only affects aesthetics but may also impair the normal use of the phone. Therefore, consumers' demand for phone screen protection is increasing, leading to the development of tempered glass screen protectors. "Blue light" refers to blue visible light with a wavelength between 400-500 nanometers, commonly found in the sun, mobile phones, computers, televisions, and other electronic devices. Prolonged exposure to this wavelength of blue light can cause irreversible damage to the user's retina. Therefore, to better protect users' eyes, blue light blocking screen protectors have emerged. Red light eye protection is an innovative eye protection technology that utilizes red light within a specific wavelength range (usually 650-670 nanometers). Through its unique physiological mechanism, it protects and nourishes the eyes. This specific wavelength of red light can be absorbed by the mitochondria of the retina, providing energy to cells and helping to improve vision decline. Red light also helps slow down the aging process of the retina and improve visual sensitivity.

[0003] Existing tempered glass screen protectors have the following drawbacks: First, red light blocking screen protectors are still in their early stages and have relatively limited functionality, only capable of stimulating red light. However, these protectors do not integrate blue light blocking, failing to simultaneously meet users' dual needs for red light stimulation and blue light blocking. Second, red light blocking screen protectors typically exhibit a pale red hue, leading to a higher screen color temperature and consequently affecting color performance. For users seeking a high-quality visual experience, this is undoubtedly a significant drawback. Third, blue light blocking materials often have a pale yellow base color. This is primarily due to the use of blue light absorption technology. By adding blue light blocking factors to the substrate, some blue light energy is automatically absorbed when it passes through these materials. To effectively absorb blue light, the lens needs to display yellow, the complementary color of blue light. Therefore, most blue light blocking lenses on the market currently have a slightly yellow base color, which negatively impacts the user's visual experience to some extent. Summary of the Invention

[0004] The purpose of this invention is to provide a tempered glass film that blocks blue light and excites red light, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tempered film that blocks blue light and excites red light, comprising a high-transparency PET substrate, wherein a blue light blocking coating is fixedly connected to one side of the outer wall of the high-transparency PET substrate, a photoexcited carbon quantum dot coating is disposed on one side of the blue light blocking coating, and a high-transparency OCA is disposed on one side of the photoexcited carbon quantum dot coating.

[0006] As a further technical solution of the present invention, a high-aluminum triple-strength glass is fixedly connected to one side of the outer wall of the high-transparency OCA.

[0007] As a further technical solution of the present invention, a silicone layer is provided on the other side of the high-transparency PET substrate, and a PET release film is provided on the outer wall of one side of the silicone layer.

[0008] As a further technical solution of the present invention, the high-transparency OCA uses high-transparency OCA adhesive, and in this structure, its thickness is 85 micrometers.

[0009] As a further technical solution of the present invention, the photoexcited carbon quantum dot coating is a novel nanomaterial with a quantum dot particle size of less than 10 nanometers, a quantum yield of 30%, a purity of 80%, an excitation wavelength of 400 nanometers, and an emission wavelength of 610 nanometers. The emission wavelength of the red quantum dots can be changed by adjusting the particle size. The smaller quantum dots emit light close to blue, while the larger quantum dots emit light close to red.

[0010] As a further technical solution of the present invention, the blue light blocking coating is composed of phosphor, organic light absorber, ultraviolet absorber, resin and organic filler, and the mass percentage content of each component is as follows: phosphor 10-15%, organic light diffusing powder 0-10%, ultraviolet absorber 0-10%, inorganic filler 15-20%, and resin as the balance.

[0011] As a further technical solution of the present invention, the thickness of the blue light blocking coating in this structure is 15 micrometers.

[0012] As a further technical solution of the present invention, the high-transparency PET substrate is a film made of polyethylene terephthalate polymer through biaxial stretching. In this structure, it serves as the substrate of the privacy screen resin and has a thickness of 25 micrometers.

[0013] As a further technical solution of the present invention, the silicone layer is made of silicone resin and is formed by thermosetting.

[0014] As a further technical solution of the present invention, the PET release film is made of PET polyester film, which serves as an optical release film with a thickness of 50 micrometers.

[0015] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention not only has the function of stimulating red light, but also effectively blocks blue light. It utilizes the 380nm wavelength violet light emitted by the screen to stimulate the 620-700nm wavelength red light, which is beneficial to the eyes, while simultaneously blocking the blue light emitted by the screen in the 435-440nm wavelength range. This not only blocks the harmful effects of blue light on the eyes, but also achieves an eye-protecting effect, realizing the dual functions of red light stimulation and blue light blocking, providing more comprehensive eye protection. Furthermore, addressing the issue of excessively high color temperature in red light films on the market, this invention uses carbon quantum dot technology, with a transmittance of over 90%, consistent with materials such as PET and glass. It is completely transparent in the non-stimulated state, without affecting the screen's color performance. In the red light stimulation state, the screen brightness attenuation is less than 20%, and the color temperature difference is less than 2. The screen maintains a brightness and color stability with a transmittance of over 80% for 550nm visible light, and a brightness decay of less than 20% and a color temperature difference of less than 200K. This ensures that users can enjoy the eye protection function without affecting the normal use of the screen. Addressing the issue of traditional blue light blocking materials having a yellowish undertone, this invention is composed of inorganic nanomaterials and polymer materials. By precisely absorbing blue light in the 435nm–440nm wavelength range, it effectively blocks blue light transmission with a blocking rate of over 40%, providing effective anti-blue light protection. Simultaneously, it ensures the transmission of visible light in the 440nm–780nm range without affecting visibility and light transmission. Compared to red light AB adhesives on the market with limited red light amplification, this invention increases the red light band amplification to over 40%, significantly enhancing the eye protection effect of red light. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the layer structure of the present invention;

[0017] Figure 2 A graph showing the brightness differences of different tempered glass films on OLED screens across various wavelengths;

[0018] Figure 3 This describes the light transmittance of the present invention in the wavelength range of 380 to 460 nanometers.

[0019] Figure 4 This is a schematic diagram of an experiment under a general light source, as described in this application.

[0020] Figure 5 This is an experimental schematic diagram of the 380nm specified laser band light source used in this application.

[0021] In the image: 1. High-aluminum triple-strength glass; 2. High-transparency OCA; 3. Photo-excited carbon quantum dot coating; 4. Blue light blocking coating; 5. High-transparency PET substrate; 6. Silicone layer; 7. PET release film. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 -Appendix Figure 5 This invention provides an embodiment of a tempered glass film that blocks blue light and excites red light, comprising a high-transparency PET substrate 5, a blue light blocking coating 4 fixedly connected to one outer wall of the high-transparency PET substrate 5, a photoexcited carbon quantum dot coating 3 disposed on one side of the blue light blocking coating 4, and a high-transparency OCA2 disposed on one side of the photoexcited carbon quantum dot coating 3; a high-alumina triple-strength glass 1 fixedly connected to one outer wall of the high-transparency OCA2; a silicone layer 6 disposed on the other side of the high-transparency PET substrate 5, and a PET release film 7 disposed on one outer wall of the silicone layer 6; the high-transparency OCA2 uses high-transparency OCA adhesive, and in this structure, its thickness is 85 micrometers; the photoexcited carbon quantum dot coating 3 is a novel nanomaterial, wherein the quantum dot particle size of the quantum coating 3 is less than 10 nanometers, the quantum yield is 30%, the purity is 80%, the excitation wavelength is 400 nanometers, the emission wavelength is 610 nanometers, and the red light emission wavelength is 610 nanometers. Quantum dots can have their emission wavelength altered by adjusting their particle size; smaller quantum dots emit light closer to blue, while larger quantum dots emit light closer to red. The blue light blocking coating 4 is composed of phosphor, organic light absorber, ultraviolet absorber, resin, and organic filler, with the following mass percentages: phosphor 10-15%, organic light diffusing powder 0-10%, ultraviolet absorber 0-10%, inorganic filler 15-20%, and resin as the balance. In this structure, the blue light blocking coating 4 has a thickness of 15 micrometers. The high-transmittance PET substrate 5 is a film made from polyethylene terephthalate polymer through biaxial stretching; in this structure, it serves as the substrate for the privacy screen resin structure and has a thickness of 25 micrometers. The silicone layer 6 is made of silicone resin and is thermosetting. The PET release film 7 is made of PET polyester film and serves as an optical release film in this structure, with a thickness of 50 micrometers.

[0024] Working Principle: This invention provides a tempered glass film that blocks blue light and excites red light. It comprises high-alumina triple-strength glass 1, high-transparency OCA 2, photo-excited carbon quantum dot coating 3, blue light blocking coating 4, high-transparency PET substrate 5, silicone layer 6, and PET release film 7. The high-alumina triple-strength glass 1 is treated with nano-explosion-proof materials, resulting in higher hardness (9 times that of ordinary tempered glass) and improved high-definition eye protection. The high-transparency OCA 2 uses high-transparency OCA adhesive, which has high light transmittance, low haze, minimal impact on the reflectivity of the anti-reflective film, strong adhesion, and excellent weather resistance. The photocured OCA... A has good flatness. Under this structure, its thickness is 85 micrometers. Photoexcited carbon quantum dot coating 3 is a novel nanomaterial that has attracted much attention due to its unique luminescence properties, excellent biocompatibility, and diverse surface functional groups. These functional groups can affect its electronic structure and thus change its luminescence properties by interacting with other molecules. The quantum dot particle size is less than 10 nanometers, with high luminescence intensity, quantum yield of 30%, purity of 80%, excitation wavelength of 400 nanometers, and emission wavelength of 610 nanometers. Red quantum dots can change the emission wavelength by adjusting the particle size. Smaller quantum dots emit near-blue light, while larger ones emit near-red light. For example, CdSe quantum dots with a particle size of 2.1 nm emit blue light, 5 nm emit green light, and 10 nm emit red light. In this structure, the thickness is 15 nm. The carbon quantum dot transmittance of the photoexcited carbon quantum dot coating 3 is over 90%, comparable to that of ordinary PET (polyethylene terephthalate) and glass. It is completely transparent in the unexcited state. The blue light blocking coating 4 is composed of phosphor, organic light absorber, ultraviolet absorber, resin, and organic filler. The mass percentage content of each component is as follows: phosphor 10-15%, organic light diffusing powder 0-10%, ultraviolet absorber 0-10%, inorganic filler 15-20%, and resin as the balance. This coating can effectively filter blue light emitted in the harmful blue light band. In this structure, its thickness is 15 micrometers. It is a blue light blocking coating 4 composed of inorganic nanomaterials and polymer materials. This material can accurately absorb blue light in the 435nm-440nm band, effectively blocking the transmission of blue light, while allowing visible light in the 440nm-780nm band to pass through without affecting the transparency and light transmission. Figure 3To illustrate the light transmittance of this invention within the 380-460 nm wavelength range, the high-transmittance PET substrate 5 is a film made from polyethylene terephthalate polymer through biaxial stretching. Optical-grade PET polyester film possesses characteristics such as high light transmittance, low haze, high brightness, non-yellowing, good adhesion, good flatness, no visible or dark lines, resistance to high temperatures and ultraviolet radiation, good stiffness, resistance to burn-cracking, and resistance to damage. In this structure, it serves as the substrate for the privacy layer resin, with a thickness of 25 micrometers. The silicone layer 6 is made of organosilicon resin, cured by thermosetting. The PET release film 7 is made of PET polyester film, serving as the optical release film in this structure, with a thickness of 50 micrometers. Commercially available red light AB adhesives can only increase red light amplification to approximately 20%, while this invention increases the red light amplification to over 40%. Figure 2 It can be observed that the present invention exhibits the highest red light brightness in the 620 nm wavelength band, a performance significantly superior to conventional levels. Compared to three mainstream tempered glass screen protectors and the original device, the present invention demonstrates particularly outstanding brightness performance in the key wavelength band of 600 to 620 nm. Commercially available red light AB adhesives typically exhibit a pale red color, which can cause a red shift in screen hue and affect the screen's color performance. However, the carbon quantum dots utilized in this invention are completely transparent and only exhibit red color when excited, thus not affecting the screen's color performance during normal use. Commercially available red light AB adhesives typically lack blue light blocking capabilities, with a blue light blocking rate generally only 10-20%. In contrast, this invention ensures a blue light blocking rate exceeding 40% in the blue light band (435-440 nm), effectively blocking blue light, and utilizes eye-friendly violet light to excite eye-protecting red light.

[0025] See Figure 4 , Figure 4 The experimental schematic diagram of this application under a general light source is shown below. Figure 4 As shown, Figure 4 The diagram shows a typical light source (i.e., natural light). Image 5A shows the effect of a tempered glass screen protector that blocks blue light while exciting red light, and image 5B shows a typical tempered glass screen protector that blocks blue light. It is very clear that the tempered glass screen protector of this application has a better blue light blocking effect. (See also...) Figure 5 , Figure 5 This is an experimental schematic diagram of the 380nm specified laser band light source used in this application, as shown below. Figure 5 The diagram shown illustrates a light source with a specified laser wavelength of 380nm. Figure 5 As shown in the image, 6A is an image of the blue light blocking tempered glass film that stimulates red light, and 6B is an image of a regular blue light blocking tempered glass film. It is very obvious that the tempered glass film of this application has a better blue light blocking effect.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tempered glass film that blocks blue light and excites red light, comprising a high-transmittance PET substrate (5), characterized in that: A blue light blocking coating (4) is fixedly connected to one side of the outer wall of the high-transparency PET substrate (5). A photoexcited carbon quantum dot coating (3) is provided on one side of the blue light blocking coating (4), and a high-transparency OCA (2) is provided on one side of the photoexcited carbon quantum dot coating (3).

2. The tempered glass film for blocking blue light and exciting red light according to claim 1, characterized in that: High-alumina triple-strength glass (1) is fixedly connected to one side of the outer wall of the high-transparency OCA (2).

3. The tempered glass film for blocking blue light and exciting red light according to claim 1, characterized in that: A silicone layer (6) is provided on the other side of the high-transparency PET substrate (5), and a PET release film (7) is provided on the outer wall of one side of the silicone layer (6).

4. The tempered glass film for blocking blue light and exciting red light according to claim 1, characterized in that: The high-transparency OCA (2) uses high-transparency OCA adhesive, and its thickness is 85 micrometers in this structure.

5. The tempered glass film for blocking blue light and exciting red light according to claim 1, characterized in that: The photoexcited carbon quantum dot coating (3) is a novel nanomaterial with a quantum dot particle size of less than 10 nanometers, a quantum yield of 30%, a purity of 80%, an excitation wavelength of 400 nanometers, and an emission wavelength of 610 nanometers.

6. The tempered glass film for blocking blue light and exciting red light according to claim 1, characterized in that: The blue light blocking coating (4) is composed of phosphor, organic light absorber, ultraviolet absorber, resin and organic filler. The mass percentage content of each component is as follows: phosphor 10-15%, organic light diffusing powder 0-10%, ultraviolet absorber 0-10%, inorganic filler 15-20%, and resin as the balance.

7. The tempered glass film for blocking blue light and exciting red light according to claim 6, characterized in that: The blue light blocking coating (4) has a thickness of 15 micrometers in this structure.

8. The tempered glass film for blocking blue light and exciting red light according to claim 1, characterized in that: The high-transparency PET substrate (5) is a film made of polyethylene terephthalate polymer through biaxial stretching. In this structure, it serves as the substrate of the privacy screen resin and has a thickness of 25 micrometers.

9. A tempered glass film for blocking blue light and exciting red light according to claim 3, characterized in that: The silicone layer (6) is made of silicone resin and is formed by thermosetting.

10. A tempered glass film for blocking blue light and exciting red light according to claim 3, characterized in that: The PET release film (7) is made of PET polyester film and serves as an optical release film with a thickness of 50 micrometers.

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