This application claims the benefits of the Chinese Patent Application Serial Number 201710936596.X, filed on Oct. 10, 2017, the subject matter of which is incorporated herein by reference.
The present disclosure relates to a display device. More particularly, the present disclosure relates to a display device with an optical film having anti-UV function.
With the continuous advancement of technologies related to displays, all the display panels are now developed toward compactness, thinness, and lightness. This trend makes thin displays, such as liquid crystal display panels, replace cathode-ray-tube displays as the mainstream display devices on the market. Applications of thin displays are numerous. Most electronic products for daily use, such as mobile phones, notebook computers, video cameras, still cameras, music displays, mobile navigators, and TV sets, employ such display panels.
However, the external UV light or the UV light from the backlight module causes adverse effect to the display device. For example, in the liquid crystal display device, the liquid crystal molecules or the polarizer may be damaged by the UV light, which influences the alignment of the liquid crystal molecules. In addition, the transistors in the display panel may also be damaged by the UV light, resulting in the switch property thereof deteriorated.
Therefore, it is desirable to provide an optical film with anti-UV function, so the influence of the UV light on the display device which may cause the display quality of the display device decreased can be prevented.
The present disclosure provides a display device, which comprises: a display panel; and an optical film disposed at a side of the display panel.
The optical film of the present disclosure comprises: a supporting layer; and a first anti-UV layer disposed corresponding to the supporting layer, wherein the first anti-UV layer is an adhesive layer, a surface-treated layer, or an optical functional layer.
In the present disclosure, the optical film itself comprises a first anti-UV layer. When the optical film is applied on a display device, UV light from external environment or the backlight module can be blocked or absorbed, and the display quality of the display device can further be improved.
Other novel features of the disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
The following embodiments when read with the accompanying drawings are made to clearly exhibit the above-mentioned and other technical contents, features and/or effects of the present disclosure. Through the exposition by means of the specific embodiments, people would further understand the technical means and effects the present disclosure adopts to achieve the above-indicated objectives. Moreover, as the contents disclosed herein should be readily understood and can be implemented by a person skilled in the art, all equivalent changes or modifications which do not depart from the concept of the present disclosure should be encompassed by the appended claims.
Furthermore, the ordinals recited in the specification and the claims such as “first”, “second” and so on are intended only to describe the elements claimed and imply or represent neither that the claimed elements have any proceeding ordinals, nor that sequence between one claimed element and another claimed element or between steps of a manufacturing method. The use of these ordinals is merely to differentiate one claimed element having a certain designation from another claimed element having the same designation.
Furthermore, the terms recited in the specification and the claims such as “above”, “over”, or “on” are intended not only directly contact with the other element, but also intended indirectly contact with the other element. Similarly, the terms recited in the specification and the claims such as “below”, or “under” are intended not only directly contact with the other element but also intended indirectly contact with the other element.
Furthermore, the terms recited in the specification and the claims such as “connect” is intended not only directly connect with other element, but also intended indirectly connect and electrically connect with other element.
In addition, the features in different embodiments of the present disclosure can be mixed to form another embodiment.
Herein, the function of the optical film is not particularly limited. The optical film can be used as a brightness enhancement film, a light guide plate, a diffusion film, a polarizer, or any other film contained in a display device, as long as the optical film in the display device which has to have anti-UV effect can be the optical film of the present embodiment.
In the present embodiment, the first anti-UV layer 12 can be an adhesive layer, a surface-treated layer, or an optical functional layer. When the first anti-UV layer 12 is a surface-treated layer, the surface-treated layer can have at least one function of scratch resistance, anti-glare, anti-reflection or dirt resistance, or the surface-treated layer can make the optical film have a matt or glossy appearance. However, the present disclosure is not limited thereto. When the first anti-UV layer 12 is an optical functional layer, the optical functional layer can be a quantum dot enhancement layer, a phosphor film, or an optical film capable of blocking or absorbing light with any wavelength corresponding to one of an UVA band (which has a wavelength in a range from 315 nm to 400 nm), an UVB band (which has a wavelength in a range from 280 nm to 315 nm) and an UVC band (which has a wavelength in a range from 100 nm to 280 nm) or converting them into visible band. However, the present disclosure is not limited thereto.
In the present disclosure, the material comprised in the first anti-UV layer 12 is not particularly limited, as long as the first anti-UV layer 12 can at least absorb or block light with any wavelength corresponding to one of the UVA band, the UVB band and the UVC band. The UV transmittance of the first anti-UV layer 12 can be equal to or less than 50% in any wavelength corresponding to one of the UVA band, the UVB band and the UVC band. In another embodiment of the present disclosure, an average UV transmittance of the first anti-UV layer 12 can be equal to or less than 50% in one of the UVA band, the UVB band and the UVC band. In another embodiment of the present disclosure, the UV transmittance of the first anti-UV layer 12 can be greater than or equal to 5% and less than or equal to 25% (5%≤UV transmittance≤25%) in any wavelength corresponding to one of the UVA band, the UVB band and the UVC band. In further another embodiment of the present disclosure, the average UV transmittance of the first anti-UV layer 12 can be greater than or equal to 5% and less than or equal to 25% (5%≤average UV transmittance≤25%) in one of the INA band, the UVB band and the UVC band. In addition, the types of the first anti-UV layer 12 is not particularly limited, and can be, for example, an UV absorbing layer, an UV blocking layer, an UV converting layer, a free-radical scavenging layer, or a combination thereof.
When a proper amount of the light stabilizer is contained in the matrix for the first anti-UV layer 12, the aforesaid purpose of blocking or absorbing UVA, UVB or UVC can be achieved. Herein, the matrix for the first anti-UV layer 12 can comprise, for example, pressure sensitive adhesive, other adhesive materials, polymers or resins; but the present disclosure is not limited thereto.
In addition, the light stabilizer suitable for the first anti-UV layer 12 can be selected according to the desired property of the first anti-UV layer 12. When the first anti-UV layer 12 is an UV absorbing layer, the light stabilizer contained therein can be UV absorbers, which can absorb UV light effectively and only absorb small amount of visible light. Examples of the UV absorbers may comprise, but are not limited to, benzophenone, o-hydrobenzophenone, benzotriazole, salicylate, triazine, substituted acrylonitrile, oxalamide, or their derivatives. When the first anti-UV layer 12 is an UV blocking layer, the light stabilizer contained therein can be UV blocking agents, which can effectively absorb or reflect UV light. Thus, the UV light does not pass through the first anti-UV layer 12 to achieve the protection purpose against the UV light. Examples of the UV blocking agents may comprise, but are not limited to, organic additives or inorganic additives such as titanium dioxide. When the first anti-UV layer 12 is an UV converting layer, the light stabilizer contained therein can be UV quenching agents, which can convert the UV light into other energy to achieve the protection purpose against the UV light. Examples of the UV quenching agents may comprise, but are not limited to, organic nickel compounds. When the first anti-UV layer 12 is a free-radical scavenging layer, the light stabilizer contained therein can be free-radical scavenging agents, which can scavenge free radicals generated by the UV light in the matrix to achieve the protection purpose against the UV light. Examples of the free-radical scavenging agents may comprise, but are not limited to, hindered amine light stabilizers (HALS). When preparing the first anti-UV layer 12, one or more aforesaid light stabilizer can be added into the matrix to achieve the protection purpose against the UV light.
In one embodiment of the present disclosure, when the matrix for the first anti-UV layer 12 comprises polyester such as polymethylmethacrylate (PMMA), polyethylene terephthalate (PET) or a combination thereof, the light stabilizer suitable for the first anti-UV layer 12 may comprise, for example, a reactive product of o-nitroaniline and p-cresol, 2-hydroxy-4-methoxybenzophenone, hexamethylphosphoramide, 2-(2′-hydroxy-3′, 5′-ditertbutylphenyl)-5-chlorobenzotriazole, 2-(2′-hydroxy-3′, 5′-dipentylphenyl)-5-chlorobenzotriazole, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, or a combination thereof; but the present disclosure is not limited thereto.
In addition, the supporting layer 11 can be a substrate or a film. The supporting layer 11 may comprise, for example, glass, plastic (such as PET, PMMA, polyimide (PI), triacetate cellulose (TAG) or other polymers), or resins; but the present disclosure is not limited thereto. Herein, the material for the supporting layer 11 may be a material without anti-UV property. Hence, an optical film with anti-UV property can be obtained by disposing the first anti-UV layer 12 on the supporting layer 11. Therefore, even though a substrate or a film with anti-UV property is not used as the supporting layer 11, an optical film with anti-UV property can be obtained by disposing the first anti-UV layer 12 on the supporting layer 11. Alternatively, when the supporting layer 11 containing a material with anti-UV property is co-used with the first anti-UV layer 12 with anti-UV property, the anti-UV property of the optical film can further be improved.
When the optical film shown in
Herein, the supporting layer 11 and the matrix layer 14 can protect the particles providing polarization without being damaged, and the material for the supporting layer 11 and the matrix layer 14 can be those stated above for the supporting layer. In the present embodiment, the supporting layer 11 and the matrix layer 14 may comprise PMMA or PET to improve the waterproof property of the polarizing layer 13 or maintain the extending, property of the polarizing layer 13. When the display device uses a polarizer in which the material for the supporting layer 11 or the matrix layer 14 comprises PMMA or PET, the environmental moisture or water resistance of the display device can be improved. Herein, the material for the supporting layer 11 and the matrix layer 14 can be a material without anti-UV property, so an optical film with anti-UV property can be obtained by using the first anti-UV layer 12 with anti-UV property.
In the present embodiment, the optical film may further comprise a second anti-UV layer 15, and the supporting layer 11 is disposed between the first anti-UV layer 12 and the second anti-UV layer 15. An UV transmittance of the second anti-UV layer 15 is equal to or less than 50% in any wavelength corresponding to one of an UVA band, an UVB band and an UVC band. In another embodiment of the present disclosure, an average UV transmittance of the second anti-UV layer 15 is equal to or less than 50% in one of an UVA band, an UVB band and an UVC band. In another embodiment of the present disclosure, the UV transmittance of the second anti-UV layer 15 is greater than or equal to 5% and less than or equal to 25% (5%≤UV transmittance≤25%) in any wavelength corresponding to one of the UVA band, the UVB band and the UVC band. In further another embodiment of the present disclosure, the average UV transmittance of the second anti-UV layer 15 is greater than or equal to 5% and less than or equal to 25% (5%≤average UV transmittance≤25%) in one of the UVA band, the UVB band and the UVC band. Herein, the types and the properties of the second anti-UV layer 15 can be referred to those of the first anti-UV layer 12, and the descriptions thereof are not repeated again.
In addition, in the present embodiment, the optical film may further comprise a functional layer 16 disposed on the second anti-UV layer 15. The functional layer 16 can be a supporting layer comprising a surface-treated layer, wherein the surface-treated layer can have at least one function of scratch resistance, anti-glare, anti-reflection or dirt resistance, or the surface-treated layer can make the optical film have a matt or glossy appearance. Alternatively, the functional layer 16 can be an optical functional layer, wherein the optical functional layer can be a quantum dot enhancement layer, a phosphor film, or an optical film capable of blocking or absorbing light with any wavelength corresponding to one of an UVA band, an UVB band and an UVC band or converting them into visible band. However, the present disclosure is not limited thereto.
It should be noted that, the structure obtained after removing the release film 21 and the protection film 22 shown in
The optical film shown in
Herein, the display panel 31 being a liquid crystal display panel is used as an example of the present disclosure. However, the present disclosure is not limited thereto. The optical film shown in
In addition, the application of the optical film of the present disclosure is not limited to the optical film used as a polarizer as shown in
The aforesaid direct type backlight module and edge type backlight module are only illustrated for examples, but the backlight module suitable for the display device of the present disclosure are not limited to have the structures shown in
Although the present disclosure has been explained in relation to its embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the disclosure as hereinafter claimed.
Number | Date | Country | Kind |
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201710936596.X | Oct 2017 | CN | national |