Glare-free film and display device comprising same

Abstract

This glare-free film comprises: a base material; a diffusion layer which is provided on the upper surface of the base material, and which includes a plurality of protrusions protruding from the upper surface thereof; and a low reflection layer provided on the upper surface of the diffusion layer. The plurality of protrusions of the diffusion layer protrude higher than the height of the upper surface of the low reflection layer.

Description

Glare-free film and display device including the same

[0001] The present disclosure relates to a glare-free film and a display device including the same.

[0002] Typically, a display device includes a display panel configured to display images.

[0003] The display surface that displays the image on the display panel is made of glass, which allows for a high degree of reflection of external light. Consequently, viewers viewing the display device can see the outside world, or the location where the display device is installed, reflected on the display surface. In other words, the display device can act like a mirror.

[0004] If external appearance is reflected on the display device, the immersion of the viewer watching the video displayed on the display device may be reduced.

[0005] Additionally, it is not aesthetically pleasing if the external appearance is reflected on the display surface of the display device even when the display device is turned off.

[0006] Additional aspects will be partly set forth in the following description, and partly will be apparent from the description, or may be learned by practicing the embodiments provided.

[0007] A glare-free film according to one or more embodiments of the present disclosure may include: a substrate; a diffusion layer provided on an upper surface of the substrate and including a plurality of protrusions protruding from the upper surface; and a low-reflection layer provided on an upper surface of the diffusion layer. The plurality of protrusions of the diffusion layer may protrude higher than a height of the upper surface of the low-reflection layer.

[0008] According to one or more embodiments of the present disclosure, the gloss of the glare-free film may be 20 GU or less.

[0009] According to one or more embodiments of the present disclosure, the SCI (Specular common included) reflectance of the glare-free film may be 2% or less.

[0010] According to one or more embodiments of the present disclosure, the area ratio of the plurality of protrusions to the area of ​​the diffusion layer may be 30% or more and 40% or less.

[0011] According to one or more embodiments of the present disclosure, the haze of the diffusion layer may be 30% or more.

[0012] According to one or more embodiments of the present disclosure, the plurality of particles may form the plurality of protrusions, and the diffusion layer may include a flat portion on which the plurality of particles are fixed. The flat portion may be formed from a solution. The mixing ratio of the solution and the plurality of particles may be 8:1.

[0013] According to one or more embodiments of the present disclosure, the solution may be formed of a photocurable polymer. The plurality of particles may be formed of silica.

[0014] According to one or more embodiments of the present disclosure, the size of the plurality of particles may be 2.7±0.6 μm.

[0015] According to one or more embodiments of the present disclosure, the substrate may be formed of a polyethylene terephthalate film (PET film) or a tri-acetly-cellulose film (TAC film).

[0016] According to one or more embodiments of the present disclosure, the PET film may be an optical PET film containing a UV absorber or an optical PET film manufactured by a monoaxial / biaxial stretching method.

[0017] According to one or more embodiments of the present disclosure, the refractive index of the diffusion layer is not equal to the refractive index of the low-reflection layer.

[0018] A display device according to one or more embodiments of the present disclosure may include a display panel; and a glare-free film installed on a front surface of the display panel. The glare-free film may include: a substrate; a diffusion layer installed on an upper surface of the substrate and including a plurality of protrusions protruding from the upper surface; and a low-reflection layer installed on an upper surface of the diffusion layer. The plurality of protrusions of the diffusion layer may protrude higher than a height of an upper surface of the low-reflection layer.

[0019] According to one or more embodiments of the present disclosure, the gloss of the glare-free film may be 20 GU or less.

[0020] According to one or more embodiments of the present disclosure, the SCI (Specular common included) reflectance of the glare-free film may be 2% or less.

[0021] According to one or more embodiments of the present disclosure, the haze of the glare-free film may be 30% or greater.

[0022] The above-described and other aspects, features, and advantages of the embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings. In the accompanying drawings:

[0023] FIG. 1 is a partially enlarged cross-sectional view showing a glare-free film according to one or more embodiments of the present disclosure.

[0024] FIG. 2 is a plan view of a glare-free film according to one or more embodiments of the present disclosure.

[0025] FIG. 3 is a conceptual diagram illustrating a method for forming a diffusion layer of a glare-free film according to one or more embodiments of the present disclosure.

[0026] FIG. 4 is a cross-sectional view illustrating a display device including a glare-free film according to one or more embodiments of the present disclosure.

[0027] FIG. 5 is a perspective view illustrating a display device including a glare-free film according to one or more embodiments of the present disclosure.

[0028] FIG. 6 is an exploded perspective view illustrating the display device illustrated in FIG. 5 according to one or more embodiments of the present disclosure.

[0029] FIG. 7 is an exploded perspective view showing a light source device of the display device illustrated in FIG. 6 according to one or more embodiments of the present disclosure.

[0030] FIG. 8 is an exploded perspective view showing a light source device of the display device illustrated in FIG. 6 according to one or more embodiments of the present disclosure.

[0031] FIG. 9 is an exploded perspective view illustrating a display device including a glare-free film according to one or more embodiments of the present disclosure.

[0032] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather include various modifications, equivalents, or alternatives of the embodiments.

[0033] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0034] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0035] In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0036] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0037] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0038] When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0039] The terms "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0040] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0041] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0042] In addition, terms such as 'front end', 'rear end', 'upper end', 'lower end', 'top end', and 'bottom end' used in the present disclosure are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0043] The present disclosure relates to a glare-free film formed to improve viewer immersion by minimizing light reflection occurring on a display surface of a display device, and to a display device having the same.

[0044] Hereinafter, a glare-free film (1) according to one or more embodiments of the present disclosure will be described with reference to FIGS. 1 and 2.

[0045] FIG. 1 is a partial cross-sectional enlarged view showing a glare-free film (1) according to one or more embodiments of the present disclosure. FIG. 2 is a plan view of a glare-free film (1) according to one or more embodiments of the present disclosure.

[0046] Referring to FIG. 1, a glare-free film (1) according to one or more embodiments of the present disclosure may include a substrate (10), a diffusion layer (20), and a low-reflection layer (30).

[0047] The substrate (10) forms the base of the glare-free film (1). The substrate (10) can be attached to the display surface of the display panel (60) (see FIG. 4).

[0048] The substrate (10) can be formed as a transparent film.

[0049] For example, the substrate (10) can be formed of a PET film (polyethylene terephthalate film).

[0050] Specifically, the PET film may be formed as an optical PET film containing an ultraviolet (UV) absorbent. Alternatively, the PET film may be formed as an optical PET film manufactured by a uniaxial stretching method. Alternatively, the PET film may be formed as an optical PET film manufactured by a biaxial stretching method.

[0051] As another example, the substrate (10) may be formed of a TAC film (tri-acetly-cellulose film).

[0052] The diffusion layer (20) is formed so as to scatter and diffuse incident light. The diffusion layer (20) is installed on the upper surface of the substrate (10) and may include a plurality of protrusions (22a) protruding from one surface. The plurality of protrusions (22a) may protrude from the upper surface of the diffusion layer (20). By virtue of the plurality of protrusions (22a), the diffusion layer (20) can scatter light incident from the outside.

[0053] The plurality of protrusions (22a) may be formed to have a constant area ratio. Specifically, the plurality of protrusions (22a) may be formed to occupy an area of ​​50% or less of the area of ​​the diffusion layer (20). For example, the area ratio of the plurality of protrusions (22a) to the area of ​​the diffusion layer (20) may be approximately 30 to 40%.

[0054] In the case of Fig. 2, the area of ​​the diffusion layer (20) is X x Y, and the area of ​​the plurality of protrusions (22a) refers to the sum total of the cross-sectional areas of the plurality of protrusions (22a) protruding from the diffusion layer (20). In the case where the plurality of protrusions (22a) are formed of a plurality of particles (22), the area of ​​the plurality of protrusions (22a) refers to the sum total of the maximum cross-sectional areas of the plurality of particles (22).

[0055] When the area ratio of the plurality of protrusions (22a) is less than 30%, the diffusion layer (20) cannot effectively scatter external light. In this case, the external appearance, i.e., the appearance of the location where the display device (50) (see FIG. 4) is installed, may be reflected on the diffusion layer (20).

[0056] When the area ratio of the plurality of protrusions (22a) exceeds 40%, the diffusion layer (20) can effectively scatter external light, but the image quality of the image displayed by the display panel (60) may deteriorate.

[0057] The diffusion layer (20) may include a flat portion (21) and a plurality of protrusions (22a). The plurality of protrusions (22a) are formed to protrude from the flat portion (21). The plurality of protrusions (22a) may protrude from the upper surface of the flat portion (21) to a certain height (H).

[0058] A plurality of protrusions (22a) can be formed by a plurality of particles (22). That is, one particle (22) can form one protrusion (22a).

[0059] A plurality of particles (22) can be fixed to the flat portion (21). By fixing the plurality of particles (22) to the flat portion (21), the plurality of particles (22) are attached to the flat portion (21) and cannot be moved after being attached. The lower portion (22b) of each of the plurality of particles (22) can be fixed by the flat portion (21), and the upper portion (22a) can be installed so as to protrude from the upper surface of the flat portion (21). Therefore, the upper portion (22a) of the particle (22) forms a protrusion.

[0060] Each of the plurality of particles (22) may have a size of 2.7±0.6㎛. For example, the plurality of particles (22) may be fine particles. The plurality of particles (22) may be exposed to one surface of the flat portion (21) by about 30 to 50%. For example, an upper portion (22a) corresponding to about 30 to 50% of the particles (22) may protrude upward from the upper surface of the flat portion (21). Accordingly, the protrusion (22a) protruding from the upper surface of the flat portion (21) may be about 30 to 50% of the particles (22).

[0061] Each of the plurality of particles (22) may be formed into an irregular shape. The plurality of particles (22) may not be formed into a spherical or egg-shaped shape with a smooth surface. The plurality of particles (22) may be formed into crushed pieces.

[0062] The surfaces of the plurality of particles (22) may be formed to be rough. The surfaces of the plurality of particles (22) are formed to scatter incident light. Accordingly, light incident on the plurality of particles (22) may be diffusely reflected rather than being regularly reflected.

[0063] Although FIG. 1 illustrates a case where a plurality of particles (22) are formed into a spherical shape with a rough surface, this is for convenience of illustration and the present disclosure is not limited thereto. Each of the plurality of particles (22) of the present disclosure may include irregularities formed on the surface of the particle (22). The irregularities of the plurality of particles (22) may have different sizes. As another example, the particles (22) may be spherical, egg-shaped, or may have an irregular three-dimensional shape.

[0064] The flat portion (21) is transparent and can be formed of a material capable of fixing a plurality of particles (22). That is, the flat portion (21) can be formed of a material capable of functioning as a binder.

[0065] The flat portion (21) may be formed of a transparent polymer. For example, the flat portion (21) may be formed of a photocurable polymer.

[0066] The flat portion (21) can be formed from a solution. That is, when the solution is solidified, the flat portion (21) of the diffusion layer (20) can be formed.

[0067] The plurality of particles (22) may be formed of a material capable of scattering externally incident light. For example, the plurality of particles (22) may be formed of silica. That is, the plurality of particles (22) may be formed by crushing silica.

[0068] The diffusion layer (20) can be formed in the form of a solution. That is, the diffusion layer (20) can be formed as a diffusion layer solution containing a plurality of particles (22).

[0069] At this time, the mixing ratio of the solution and the plurality of particles (22) may be 8:1. Specifically, the diffusion layer solution may be a mixture of solution, particles, and other substances in a ratio of about 8:1:1. The other substances may include additives, accelerators, etc. other than the plurality of particles (22).

[0070] When a diffusion layer solution containing a plurality of particles (22) is applied to the upper surface of a substrate (10) and the solution is hardened, a diffusion layer (20) can be formed on the upper surface of the substrate (10). At this time, when the thickness of the solution applied is made smaller than the maximum size of the plurality of particles (22), the upper portions of the plurality of particles (22) can protrude above the solution to form a plurality of protrusions (22a). The lower portions (22b) of the plurality of particles (22) can be accommodated inside the diffusion layer (20). That is, the lower portions (22b) of the plurality of particles (22) can be fixed by the diffusion layer (20).

[0071] When a diffusion layer (20) is formed with the above structure, the haze of the diffusion layer (20) can be 30% or more.

[0072] A low-reflection layer (30) may be installed on the upper surface of the diffusion layer (20). The low-reflection layer (30) is formed to minimize reflection of external light. For example, the low-reflection layer (30) may be formed to have an SCI (Specular component included) reflectance of 0.5% to 1.0%.

[0073] The low-reflection layer (30) may use a low-reflection film according to a conventional technique. For example, the low-reflection layer (30) may include an inorganic powder and a binder that binds the inorganic powder.

[0074] The inorganic powder may be formed in the form of particles. The size of the inorganic powder is very small compared to the size of the plurality of particles (22). For example, the size of the inorganic powder may be several dozen times smaller than the size of the particles (22). Therefore, the size of the inorganic powder is smaller than the size of the upper portion of the particles (22), i.e., the protrusions (22a).

[0075] The inorganic powder may include hollow silica and silica nanoparticles. The size of the inorganic powder is much smaller than the sizes of the plurality of particles (22). For example, the size of the hollow silica is 50 to 60 nm, and the size of the silica nanoparticles is 10 to 20 nm.

[0076] The low-reflection layer (30) may be formed with a thickness (T) lower than the height (H) of the plurality of protrusions (22a) of the diffusion layer (20). Accordingly, the plurality of protrusions (22a) of the diffusion layer (20) may protrude higher than the low-reflection layer (30). In other words, the plurality of protrusions (22a) of the diffusion layer (20) may protrude to a height (H) higher than the height (e.g., thickness T) of the upper surface of the low-reflection layer (30). The plurality of protrusions (22a) of the diffusion layer (20) may penetrate the low-reflection layer (30) and protrude from the upper surface of the low-reflection layer (30). The plurality of protrusions (22a) may protrude from the upper surface of the low-reflection layer (30) to a certain height (H1).

[0077] The low-reflection layer (30) can be formed in the form of a solution. The solution forming the low-reflection layer (30) can be referred to as a low-reflection solution.

[0078] The low-reflection layer (30) can be formed by applying a low-reflection solution to the upper surface of the diffusion layer (20). At this time, the low-reflection solution is applied so that the thickness of the application is smaller than the height of the plurality of protrusions (22a) of the diffusion layer (20). When the low-reflection solution is applied to the upper surface of the diffusion layer (20), the low-reflection solution flows down from the plurality of protrusions (22a) of the diffusion layer (20), so that the plurality of protrusions (22a) can protrude above the low-reflection layer (30).

[0079] In order to lower the reflectance of external light of the glare-free film (1) according to one or more embodiments of the present disclosure, the diffusion layer (20) and the low-reflection layer (30) may be formed to have different refractive indices.

[0080] For example, the low-reflection layer (30) can be formed to have a lower refractive index than the diffusion layer (20). That is, the refractive index of the diffusion layer (20) can be formed to be greater than the refractive index of the low-reflection layer (30).

[0081] As another example, the diffusion layer (20) can be formed to have a lower refractive index than the low-reflection layer (30). That is, the refractive index of the low-reflection layer (30) can be formed to be greater than the refractive index of the diffusion layer (20).

[0082] As described above, by forming the refractive index of the diffusion layer (20) and the refractive index of the low-reflection layer (30) to be different from each other, the reflectance of external light can be reduced.

[0083] A glare-free film (1) according to one or more embodiments of the present disclosure having a structure as described above can lower the SCI reflectance because a plurality of protrusions (22a) protruding upward of the low-reflection layer (30) lower the intensity of regular reflection of external light and induce diffuse reflection.

[0084] In addition, the external light reflected from the low-reflection layer (30) is diffusely reflected by the plurality of protrusions (22a) protruding from the low-reflection layer (30), so that the SCI reflectivity can be further reduced.

[0085] Accordingly, the gloss of the glare-free film (1) according to one or more embodiments of the present disclosure may be 20 GU or less. For example, the gloss of the glare-free film (1) may be about 9 to 13 GU. Here, the gloss refers to the gloss measured at 60 degrees.

[0086] Additionally, the SCI reflectivity of the glare-free film (1) according to one or more embodiments of the present disclosure may be 2% or less. For example, the SCI reflectivity of the glare-free film (1) may be about 0.9 to 1.1%.

[0087] Additionally, the haze of the glare-free film (1) according to one or more embodiments of the present disclosure may be 30% or more. If the haze is 30% or more, the rainbow phenomenon caused by birefringence can be improved, thereby reducing the external light reflection felt by the viewer.

[0088] Therefore, a glare-free film (1) according to one or more embodiments of the present disclosure having a low reflectivity, a high haze, and a low gloss can prevent or minimize an external appearance from being reflected by the glare-free film (1).

[0089] A comparison of the specifications of a glare-free film (1) according to one or more embodiments of the present disclosure with various films according to the prior art used to prevent external appearance from reflecting on the display surface of a display device (50) (see FIG. 4) is disclosed in Table 1 below.

[0090] Type of invention Conventional AGLR film LR film AG film SCI Reflectance 0.9~1.1% 0.4~1.5% 0.5~0.8% 4.5% Haze 30% 5~20% 0.5% 20~50% Gloss (GU) (60 degrees) 9~13 30~40 50~60 10~25

[0091] Referring to Table 1, the conventional AGLR film, i.e., the anti-glare low reflection film according to the prior art, has an SCI reflectance of 0.4 to 1.5%, which is similar to the SCI reflectance of the glare-free film (1) according to the present embodiment. However, the haze of the conventional AGLR film is 5 to 20%, which is smaller than the haze of the glare-free film (1) according to the present embodiment. In addition, the gloss of the conventional AGLR film is 30 to 40 GU, which is larger than the gloss of the glare-free film (1) according to the present embodiment. Therefore, since the conventional AGLR film has a smaller haze and a larger gloss than the haze and gloss of the glare-free film (1) according to one or more embodiments of the present disclosure, the conventional AGLR film allows the exterior appearance to be better reflected than the glare-free film (1) according to one or more embodiments of the present disclosure.

[0092] The LR film, or low reflection film, has an SCI reflectance of 0.5 to 0.8%, which is lower than the SCI reflectance of the glare-free film (1) according to the present embodiment. However, the haze of the LR film is 0.5%, which is much lower than the haze of the glare-free film (1) according to the present embodiment. In addition, the gloss of the LR film is 50 to 60 GU, which is higher than the gloss of the glare-free film (1) according to the present embodiment.

[0093] Therefore, since the LR film has a smaller haze and a larger gloss compared to the haze and gloss of the glare-free film (1) according to one or more embodiments of the present disclosure, the LR film shows the external appearance better than the glare-free film (1) according to one or more embodiments of the present disclosure.

[0094] The AG film, or anti-glare film, has an SCI reflectance of 4.5%, which is much higher than the SCI reflectance of the glare-free film (1) according to the present embodiment. However, the haze of the AG film is 20 to 50%, which is similar to or higher than the haze of the glare-free film (1) according to the present embodiment. In addition, the glossiness of the AG film is 10 to 25 GU, which is higher than the glossiness of the glare-free film (1) according to the present embodiment.

[0095] Therefore, since the SCI reflectance and glossiness of the AG film are greater than the SCI reflectance and glossiness of the glare-free film (1) according to one or more embodiments of the present disclosure, the AG film provides a better external appearance than the glare-free film (1) according to one or more embodiments of the present disclosure.

[0096] When a glare-free film (1) according to one or more embodiments of the present disclosure having a structure as described above is installed on a display device (50) (see FIG. 4), the phenomenon of an external shape being reflected on the front of the display device (50) as perceived by the viewer is reduced, thereby improving the picture quality of the display device (50). Accordingly, the viewer's immersion in the image displayed on the display device (50) can be enhanced.

[0097] Hereinafter, a method for manufacturing a glare-free film (1) according to one or more embodiments of the present disclosure will be described.

[0098] A method for manufacturing a glare-free film (1) according to one or more embodiments of the present disclosure may include a step of preparing a substrate (10), a step of forming a diffusion layer (20) on an upper surface of the substrate (10), and a step of forming a low-reflection layer (30) on an upper surface of the diffusion layer (20).

[0099] The substrate (10) can be formed using an optical PET film.

[0100] A diffusion layer (20) can be formed by applying a diffusion layer solution to the upper surface of the substrate (10). At this time, the diffusion layer (20) can be formed using a pair of rollers (101, 102) so that the plurality of protrusions (22a) of the diffusion layer (20) have a constant height.

[0101] FIG. 3 is a conceptual diagram illustrating a method for forming a diffusion layer (20) of a glare-free film (1) according to one or more embodiments of the present disclosure.

[0102] Referring to FIG. 3, a substrate (10) passes between a pair of rollers (101, 102). An application nozzle (110) for applying a diffusion layer solution may be provided upstream of the pair of rollers (101, 102) based on the direction of movement (arrow direction) of the substrate (10).

[0103] The diffusion layer solution can be applied to the upper surface of the substrate (10) by the application nozzle (110). At this time, the diffusion layer solution contains a plurality of particles (22).

[0104] When the diffusion layer solution applied to the substrate (10) passes between a pair of rollers (101, 102), the height of the plurality of protrusions (22a) protruding from the upper surface of the diffusion layer solution by the pair of rollers (101, 102) becomes constant. Here, the height of the plurality of protrusions (22a) refers to the height from the upper surface of the substrate (10) to the upper ends of the plurality of protrusions (22a). The height of the plurality of protrusions (22a) may be limited by the gap (G) between the pair of rollers (101, 102).

[0105] While the diffusion layer solution applied to the substrate (10) passes through a pair of rollers (101, 102), the diffusion layer solution flows down from the top of the plurality of particles (22) and becomes flat, and the upper portions of the plurality of particles (22) protrude above the diffusion layer solution.

[0106] After a certain period of time, the diffusion layer solution hardens to form a flat portion (21) attached to the substrate (10), and the upper portions of the plurality of particles (22) protrude above the flat portion (21) to form a plurality of protrusions (22a). The plurality of particles (22) are fixed to the substrate (10) by the flat portion (21).

[0107] When a diffusion layer (20) is formed on the upper surface of the substrate (10), a low-reflection layer (30) is formed on the upper surface of the diffusion layer (20).

[0108] The low-reflection layer (30) can be formed from a solution. Specifically, the low-reflection layer (30) can be formed by applying a low-reflection solution to the upper surface of the diffusion layer (20). At this time, the low-reflection solution is applied so that the thickness of the application is smaller than the height of the plurality of protrusions (22a) of the diffusion layer (20). In other words, the low-reflection solution is applied so that the height of the low-reflection solution applied to the upper surface of the flat portion (21) of the diffusion layer (20) is lower than the height of the plurality of protrusions (22a), i.e., the upper portion of the plurality of particles (22).

[0109] When a low-reflection solution is applied to the upper surface of the diffusion layer (20), the low-reflection solution flows down from the plurality of protrusions (22a) of the diffusion layer (20), so that the plurality of protrusions (22a) can protrude above the low-reflection layer (30). Accordingly, a low-reflection layer (30) can be formed around the plurality of protrusions (22a).

[0110] When a glare-free film (1) according to one or more embodiments of the present disclosure is manufactured using the roller method described above, the height of a plurality of protrusions (22a) protruding above the low-reflection layer (30) can be formed to be constant. For example, the plurality of protrusions (22a) protruding above the low-reflection layer (30) can be formed to have a height of a certain dimension or less.

[0111] Hereinafter, a display device (50) including a glare-free film (1) according to one or more embodiments of the present disclosure will be described with reference to FIG. 4.

[0112] FIG. 4 is a cross-sectional view showing a display device (50) including a glare-free film (1) according to one or more embodiments of the present disclosure.

[0113] Referring to FIG. 4, a display device (50) according to one or more embodiments of the present disclosure may include a display panel (60), a glare-free film (1), and a housing (70).

[0114] The display panel (60) is formed to be able to display an image. The display panel (60) may include an LCD (liquid crystal display) panel, an LED (light emitting device) display panel, an OLED (organic light emitting device) display panel, or a quantum dot display panel.

[0115] A glare-free film (1) is installed on the front of the display panel (60). The viewer can view the image displayed on the display surface of the display panel (60) through the glare-free film (1).

[0116] The glare-free film (1) may include a substrate (10), a diffusion layer (20), and a low-reflection layer (30). Since the glare-free film (1) is the same as the above-described embodiment, a detailed description thereof is omitted.

[0117] A glare-free film (1) according to one or more embodiments of the present disclosure having a structure as described above may have a gloss of 20 GU or less. For example, the glare-free film (1) may have a gloss of about 9 to 13 GU. Here, the gloss refers to a gloss measured at 60 degrees.

[0118] Additionally, the glare-free film (1) according to one or more embodiments of the present disclosure may have an SCI reflectance of 2% or less. For example, the glare-free film (1) may have an SCI reflectance of about 0.9 to 1.1%.

[0119] Additionally, the glare-free film (1) according to one or more embodiments of the present disclosure may have a haze of 30% or more.

[0120] Therefore, the glare-free film (1) according to one or more embodiments of the present disclosure has a low reflectivity, a large haze, and a low gloss, so that it can prevent or minimize external appearances from being reflected on the glare-free film (1).

[0121] The housing (70) is formed to accommodate the display panel (60). In other words, the display panel (60) is installed inside the housing (70), and the front surface of the display panel (60) forms a display surface on which an image is displayed. An opening is formed on the front surface of the housing (70) to expose the display surface of the display panel (60).

[0122] Accordingly, a display device (50) according to one or more embodiments of the present disclosure can prevent or minimize external appearances from being reflected on the display surface by installing a glare-free film (1) having a low reflectivity, high haze, and low gloss on the display surface. Accordingly, the viewer's sense of immersion in the image displayed on the display device (50) can be enhanced.

[0123] In addition, since a display device (50) according to one or more embodiments of the present disclosure has a glare-free film (1) installed on the display surface with low reflectivity, high haze, and low gloss, the external appearance is not well reflected on the display surface when the display device (50) is turned off. Accordingly, the aesthetic effect of the display device (50) as an interior decoration can be improved.

[0124] FIG. 5 is a perspective view showing a display device (50) including a glare-free film (1) according to one or more embodiments of the present disclosure.

[0125] A display device (50) is a device that processes an image signal received from the outside and can display the processed image so that it can be visually recognized. In the following, the display device (50) is exemplified as a television (TV), but the display device (50) is not limited thereto. For example, the display device (50) can be implemented in various forms such as a monitor, a portable multimedia device, a portable communication device, etc., and the form of the display device (50) is not limited as long as it is a device that displays an image.

[0126] Referring to FIG. 5, the display device (50) includes a housing (70), a display panel (60) for displaying an image, a glare-free film (1) installed on the front of the display panel (60), and a stand (80) provided on the lower portion of the housing (70) to support the housing (70).

[0127] The housing (70) forms the outer shape of the display device (10), and various parts for the display device (50) to display images or perform various functions can be provided inside the housing (70).

[0128] The housing (70) illustrated in Fig. 5 has a flat shape, but the shape of the housing (70) is not limited thereto. For example, the housing (70) may have a curved plate shape.

[0129] The display panel (60) may be configured to display an image facing forward. The display panel (60) may include a self-luminous display element or a photoluminous display element. A self-luminous display element can visually output an image by emitting light on its own without a separate light source.

[0130] For example, a light emitting diode (LED), an organic light emitting diode (OLED), a quantum dot-organic light emitting diode (QD-OLED), a micro LED made of an inorganic light emitting material, etc. may be a device that can emit light on its own based on the current supplied to it.

[0131] A photoluminescent display device may include a separate light source to visually display images. For example, a photoluminescent display device, a liquid crystal display (LCD), changes the arrangement of liquid crystals through an electric current, but requires a separate light source to visually display images through the changed arrangement of the liquid crystals.

[0132] A display device (50) according to one or more embodiments of the present disclosure can be applied to both a display panel (60) having a self-luminous display element and a display panel (60) having a photoluminous display element.

[0133] For convenience of explanation, a display panel (60) including a photoluminescent display element will be described below as an example. However, a display panel (60) including a self-luminous display element does not include a light source device (200) described below.

[0134] Referring to FIG. 5, a glare-free film (1) according to one or more embodiments of the present disclosure is installed on the front surface of a display panel (60). A viewer can view an image displayed on the front surface of the display panel (60) through the glare-free film (1).

[0135] The glare-free film (1) may include a substrate (10), a diffusion layer (20), and a low-reflection layer (30). Since the glare-free film (1) is the same as the above-described embodiment, a detailed description thereof is omitted.

[0136] The stand (80) is formed to stably support the housing (70). In FIG. 5, the stand (80) is installed at the bottom of the housing (70), but the stand (80) is not limited thereto. As another example, the stand (80) may be installed at the rear of the display device (50) and formed to support the housing (70) by fixing it to a wall.

[0137] FIG. 6 is an exploded perspective view showing the display device (50) illustrated in FIG. 5 according to one or more embodiments of the present disclosure.

[0138] Referring to FIG. 6, various components may be provided inside the housing (70) to display an image. For example, the housing (70) may include a light source device (200) which is a surface light source, a display panel (60) which blocks or passes light emitted from the light source device (200), a control unit (91) which controls the operation of the light source device (200) and the display panel (60), and a power supply unit (92) which supplies power to the light source device (200) and the display panel (60).

[0139] The display panel (60) is provided in front of the light source device (200) and is formed to block or allow light emitted from the light source device (200) to pass through to form an image. For example, the display panel (60) may be formed as a liquid crystal panel.

[0140] In addition, the housing (70) may include a bezel (71), a frame middle mold (72), a bottom chassis (73), and a rear cover (74) for supporting and fixing a display panel (60), a light source device (200), a control unit (91), and a power supply unit (92).

[0141] The light source device (200) may include a point light source that emits monochromatic light or white light, and may be configured to refract, reflect, and scatter light in order to convert light emitted from the point light source into uniform surface light. For example, the light source device (200) may include a plurality of light sources that emit monochromatic light or white light, a diffusion plate that diffuses light incident from the plurality of light sources, a reflection sheet that reflects light emitted from the rear surfaces of the plurality of light sources and the diffusion plate, and an optical sheet that refracts and scatters light emitted from the front surface of the diffusion plate.

[0142] This light source device (200) can emit uniform surface light toward the front by refracting, reflecting, and scattering light emitted from the light source.

[0143] The control unit (91) may include a control circuit that controls the operation of the display panel (60) and the light source device (200). The control circuit may process image data received from an external content source, transmit the image data to the display panel (60), and transmit dimming data to the light source device (200).

[0144] The power supply (92) can supply power to the display panel (60) and the light source device (200) so that the light source device (200) outputs surface light and the display panel (60) blocks or passes light emitted from the light source device (200).

[0145] The control unit (91) and power unit (92) may be implemented as a printed circuit board and various circuits mounted on the printed circuit board. For example, the power circuit may include a capacitor, a coil, a resistor, a processor, etc., and a power circuit board on which these are mounted. In addition, the control circuit may include a memory, a processor, and a control circuit board on which these are mounted.

[0146] Hereinafter, the structure of the light source device (200) will be described in detail with reference to FIGS. 7 and 8.

[0147] FIG. 7 is an exploded perspective view showing a light source device of the display device illustrated in FIG. 6 according to one or more embodiments of the present disclosure. For reference, FIG. 7 shows a direct-type light source device.

[0148] Referring to FIG. 7, the light source device (200) includes a light source assembly (210) that generates light, a reflective sheet (220) that reflects light, a diffuser plate (230) that uniformly diffuses light, and an optical sheet (240) that improves the brightness of the emitted light.

[0149] The light source assembly (210) may include a plurality of light sources (211) that emit light and a substrate (212) that supports and fixes the plurality of light sources (211).

[0150] The plurality of light sources (211) may be arranged in a predetermined pattern so that light is emitted with a uniform brightness. The plurality of light sources (211) may be arranged at regular intervals. For example, as illustrated in FIG. 7, the plurality of light sources (211) may be arranged in rows and columns. In other words, the plurality of light sources (211) may be arranged so that four adjacent light sources form approximately a square. However, the arrangement of the plurality of light sources (211) is not limited thereto. In addition, the plurality of light sources (211) may be arranged in various patterns as long as light can be emitted with a uniform brightness.

[0151] The light source (211) may be implemented as a device that can emit monochromatic light (light of a specific wavelength, for example, blue light) or white light (for example, light mixed with red light, green light, and blue light) in various directions when power is supplied. For example, the light source (211) may include a light emitting diode (LED).

[0152] The substrate (212) can fix a plurality of light sources (211) so that the positions of the light sources (211) do not change. In addition, the substrate (212) is formed so that power can be supplied to the plurality of light sources (211) so that each of the plurality of light sources (211) can emit light.

[0153] The substrate (212) can be implemented with a synthetic resin, reinforced glass, a printed circuit board (PCB), etc., which fixes a plurality of light sources (211) and has conductive power supply lines formed thereon for supplying power to the light sources (211).

[0154] The reflective sheet (220) can reflect light emitted from multiple light sources (211) forward or in a direction close to the forward direction.

[0155] A plurality of through holes (221) are formed in the reflective sheet (220) at positions corresponding to each of the plurality of light sources (211) of the light source assembly (210). Therefore, the light sources (211) of the light source assembly (210) can pass through the through holes (221) and protrude forward of the reflective sheet (220). The light sources (211) can be inserted into the through holes (221). Therefore, the plurality of light sources (211) can emit light toward the front of the reflective sheet (220).

[0156] A plurality of light sources (211) can emit light in various directions in front of the reflective sheet (220). Light can be emitted from the light sources (211) toward the diffuser plate (230). Additionally, light can be emitted from the light sources (211) toward the reflective sheet (220).

[0157] The reflective sheet (220) can reflect light emitted toward the reflective sheet (220) toward the diffuser plate (230). In other words, the reflective sheet (220) can reflect light incident from the light source (211) toward the diffuser plate (230).

[0158] Such a reflective sheet (220) can be manufactured by coating a highly reflective material on a base material. For example, the reflective sheet (220) can be manufactured by coating a polymer having a high reflectivity on a base material such as PET (polyethylene terephthalate).

[0159] Light emitted from a light source (211) passes through a diffuser plate (230) and an optical sheet (240). When light is incident on the diffuser plate (230) and the optical sheet (240), some of the incident light is reflected from the surface of the diffuser plate (230) and the surface of the optical sheet (240). The reflective sheet (220) can reflect the light reflected by the diffuser plate (230) and the optical sheet (240) toward the diffuser plate (230).

[0160] A diffusion plate (230) can be provided in front of the light source assembly (210) and the reflective sheet (220), and is formed so as to evenly disperse light emitted from the light source (211) of the light source assembly (210).

[0161] A plurality of light sources (211) are positioned at various locations on the rear of the light source device (200). The plurality of light sources (211) are positioned at equal intervals on the rear of the light source device (200), but brightness may become uneven depending on the location of the plurality of light sources (211).

[0162] The diffuser plate (230) is formed to diffuse light emitted from a plurality of light sources (211) in order to eliminate or alleviate unevenness in brightness caused by the plurality of light sources (211). In other words, the diffuser plate (230) can be formed so that uneven light from the plurality of light sources (211) passes through the diffuser plate (230) and becomes uniform light, thereby being uniformly emitted from the front surface of the diffuser plate (230).

[0163] The optical sheet (240) may include various types of sheets to improve brightness and uniformity of brightness. For example, the optical sheet (240) may include a diffusion sheet (241), a first prism sheet (242), a second prism sheet (243), a reflective polarizing sheet (244), etc.

[0164] The diffusion sheet (241) can be formed to diffuse light to ensure uniformity of brightness. Light emitted from the light source (211) can be diffused by the diffusion plate (230) and then diffused again by the diffusion sheet (241) included in the optical sheet (240).

[0165] The first and second prism sheets (242, 243) are formed to increase brightness by concentrating light diffused by the diffusion sheet (241). The first and second prism sheets (242, 243) may include prism patterns in the shape of triangular prisms. A plurality of prism patterns may be arranged adjacently to form a plurality of band shapes.

[0166] The reflective polarizing sheet (244) is a type of polarizing film that can be formed to transmit some of the incident light and reflect the other part to improve brightness. For example, the reflective polarizing sheet (244) can transmit polarized light having the same direction as the predetermined polarization direction of the reflective polarizing sheet (244) and reflect polarized light having a different direction from the polarization direction of the reflective polarizing sheet (244).

[0167] Additionally, light reflected by the reflective polarizing sheet (244) is recycled inside the light source device (200), and the brightness of the display device (50) can be improved by this light recycling.

[0168] The optical sheet (240) is not limited to the sheet or film illustrated in FIG. 7, and may include various sheets or films such as a protective sheet.

[0169] FIG. 8 is an exploded perspective view showing a light source device of the display device illustrated in FIG. 6 according to one or more embodiments of the present disclosure. For reference, FIG. 8 shows an edge-type light source device (200).

[0170] Referring to FIG. 8, the light source device (200) includes a light source assembly (210) formed to emit light, a waveguide plate (250) formed to disperse light, a reflective sheet (220) formed to reflect light, and an optical sheet (240) formed to enhance light brightness.

[0171] The light source assembly (210) may include a plurality of light sources (211) formed to emit light, and a substrate (212) formed to support and fix the plurality of light sources (211).

[0172] A plurality of light sources (211) can be uniformly arranged on the side of the light source device (200) as shown in FIG. 8, and can be formed to emit light toward the center of the light source device (200).

[0173] The plurality of light sources (211) may be arranged at equal intervals so that the light emitted by the plurality of light sources (211) has as uniform a brightness as possible. For example, as illustrated in FIG. 8, the plurality of light sources (211) may be arranged at equal intervals on the left and right sides of the light source device (200). However, the arrangement of the light sources (211) is not limited to that illustrated in FIG. 8. The light sources (211) may be arranged on only one of the left and right sides of the light source device (200).

[0174] The light source (211) may be implemented as a device that can emit monochromatic light (light of a specific wavelength, e.g., blue light) or white light (light mixed with light of various wavelengths) in various directions when power is supplied. For example, the light source (211) may include a light emitting diode (LED).

[0175] The substrate (212) may be formed to support and fix a plurality of light sources (211) so that the positions of the light sources (211) do not change. In addition, the substrate (212) may be formed to supply power to each of the light sources (211) for emitting light.

[0176] The substrate (212) may be placed on the side of the light source device (200) together with a plurality of light sources (211). For example, as illustrated in FIG. 8, the substrate (212) may be placed on the left and right sides of the light source device (200). However, the placement of the substrate (212) is not limited to that illustrated in FIG. 8, and may be placed on only one of the left and right sides of the light source device (200).

[0177] The substrate (212) can be implemented with a synthetic resin, reinforced glass, a printed circuit board (PCB), etc., which fixes a plurality of light sources (211) and has conductive power supply lines formed to supply power to the light sources (211).

[0178] The light guide plate (250) can be formed to change the direction of light incident from the light source assembly (210) on the side and emit light toward the front.

[0179] Additionally, the light guide plate (250) can be formed to disperse and emit light incident from the light source assembly (210) on the side toward the front of the light guide plate (250).

[0180] For example, in order to change the direction of light propagation, a plurality of convex stripes may be formed on the front surface of the light guide plate (250), and a plurality of dots may be formed on the back surface of the light guide plate (250).

[0181] Since the light source assembly (210) is positioned on the side of the light source device (200), unevenness in brightness may occur depending on the position of the light source assembly (210). Therefore, the light guide plate (250) is formed so that light emitted from the light source assembly (210) can be diffused within the light guide plate (250) in order to eliminate or alleviate unevenness in brightness due to the position of the light source assembly (210).

[0182] For example, to diffuse light, the light guide plate (250) may have a milky color. Light incident into the light guide plate (250) may travel in various directions depending on the incident angle.

[0183] This light guide plate (250) can be formed of poly methyl methacrylate (PMMA), transparent polycarbonate (PC), etc.

[0184] The reflective sheet (220) is provided at the rear of the light guide plate (250) and can be formed to reflect light emitted through the rear of the light guide plate (250) toward the light guide plate (250).

[0185] Such a reflective sheet (220) can be manufactured by coating a highly reflective material on a base material. For example, the reflective sheet (220) can be manufactured by coating a polymer having a high reflectivity on a base material such as PET (polyethylene terephthalate).

[0186] The optical sheet (240) may include various types of sheets to improve brightness and uniformity of brightness. For example, the optical sheet (240) may include a diffusion sheet (241), a first prism sheet (242), a second prism sheet (243), and a reflective polarizing sheet (244).

[0187] The diffusion sheet (241) may be formed to diffuse light to ensure uniformity of brightness. Light emitted from the light source (211) may be diffused by the light guide plate (250) and then diffused again by the diffusion sheet (241) included in the optical sheet (240).

[0188] Light passing through the diffusion sheet (241) is diffused in a direction parallel to the diffusion sheet (241), which may result in a decrease in brightness.

[0189] The first and second prism sheets (242, 243) can be formed to increase brightness by concentrating light diffused by the diffusion sheet (241).

[0190] The first and second prism sheets (242, 243) may include prism patterns in the shape of triangular prisms. A plurality of prism patterns may be arranged adjacently to form a plurality of band shapes. At this time, the direction in which the prism patterns of the first prism sheet (242) are arranged and the direction in which the prism patterns of the second prism sheet (243) are arranged may be orthogonal to each other.

[0191] Light passing through the first and second prism sheets (242, 243) has a viewing angle of approximately 70 degrees, and brightness can be improved because the light proceeds toward the front of the light source device (200).

[0192] The reflective polarizing sheet (244) is a type of polarizing film and can be formed to transmit some of the incident light and reflect the other part to improve brightness. For example, the reflective polarizing sheet (244) can be formed to transmit polarized light in the same direction as the predetermined polarization direction of the reflective polarizing sheet (244) and reflect polarized light in a different direction from the polarization direction of the reflective polarizing sheet (244).

[0193] Additionally, light reflected by the reflective polarizing sheet (244) can be recycled inside the light source device (200). By this light recycling, the brightness of the display device (50) can be improved.

[0194] The optical sheet (240) is not limited to the sheet or film illustrated in FIG. 8, and may include a wider variety of sheets or films, such as a protective sheet.

[0195] FIG. 9 is an exploded perspective view showing a display device including a glare-free film (1) according to one or more embodiments of the present disclosure.

[0196] Referring to FIG. 9, various components may be provided inside the housing (70) (see FIG. 5) to display images. For example, the housing (70) may include a display panel (60) for displaying images, a control unit (91) for controlling the operation of the display panel (60), and a power supply unit (92) for supplying power to the display panel (60).

[0197] The display panel (60) may include a self-luminous display element. A self-luminous display element can visually output an image by emitting light on its own without a separate light source.

[0198] For example, the self-luminous display device may include a light emitting diode (LED), an organic light emitting diode (OLED), a quantum dot-organic light emitting diode (QD-OLED), a micro LED made of an inorganic light emitting material, etc.

[0199] A cover glass (61) may be installed on the front surface of the display panel (60). A glare-free film (1) according to one or more embodiments of the present disclosure is installed on the front surface of the cover glass (61). A viewer can view an image displayed on the front surface of the display panel (60) through the glare-free film (1).

[0200] The glare-free film (1) may include a substrate (10), a diffusion layer (20), and a low-reflection layer (30). Since the glare-free film (1) is the same as the above-described embodiment, a detailed description thereof is omitted.

[0201] Additionally, the housing (70) may include a bezel (71), a frame middle mold (72), a bottom chassis (73), and a rear cover (74) for supporting and fixing the display panel (60), the control unit (91), and the power unit (92).

[0202] The control unit (91) may include a control circuit that controls the operation of the display panel (60). The control circuit may process image data received from an external content source and transmit the image data to the display panel (60) to display the image.

[0203] The power supply (92) can supply power to the display panel (60) so that the display panel (60) can display an image.

[0204] The control unit (91) and power unit (92) may be implemented as a printed circuit board and various circuits mounted on the printed circuit board. For example, the power circuit may include a capacitor, a coil, a resistor, a processor, etc., and a power circuit board on which these are mounted. In addition, the control circuit may include a memory, a processor, and a control circuit board on which these are mounted.

[0205] The display device (50) as described above can prevent or minimize external appearance from being reflected on the front of the display panel (60) by installing a glare-free film (1) according to one or more embodiments of the present disclosure on the front of the display panel (60).

[0206] While the present disclosure has been illustrated and described above with reference to various embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. Description; A diffusion layer installed on the upper surface of the above-mentioned substrate and including a plurality of protrusions protruding from the upper surface; and It includes a low-reflection layer installed on the upper surface of the above diffusion layer; A glare-free film, wherein a plurality of protrusions of the diffusion layer protrude higher than the height of the upper surface of the low-reflection layer.

2. In paragraph 1, Glare-free film with a gloss level of 20GU or less.

3. In paragraph 1, Glare-free film with a SCI (Specular common included) reflectance of less than 2%.

4. In paragraph 1, A glare-free film, wherein the area ratio of the plurality of protrusions to the area of ​​the diffusion layer is 30% or more and 40% or less.

5. In paragraph 1, A glare-free film having a haze of 30% or more in the above diffusion layer.

6. In paragraph 1, The plurality of protrusions on the layer are a plurality of particles, and the diffusion layer further includes a flat portion on which the plurality of particles are fixed. The above flat portion is formed with a solution, A glare-free film having a mixing ratio of the above solution and the plurality of particles of 8:

1.

7. In paragraph 6, A glare-free film, wherein the solution is formed of a photocurable polymer and the plurality of particles are formed of silica.

8. In paragraph 6, A glare-free film wherein the plurality of particles have a size of 2.7±0.6㎛.

9. In paragraph 1, The above-mentioned film is a glare-free film formed of a PET film (polyethylene terephthalate film) or a TAC film (tri-acetly-cellulose film).

10. In paragraph 9, The above PET film is a glare-free film, which is either an optical PET film containing a UV absorber or an optical PET film manufactured by a monoaxial / biaxial stretching method.

11. In paragraph 1, A glare-free film wherein the refractive index of the diffusion layer is not the same as the refractive index of the low-reflection layer.

12. Display panel; and A glare-free film installed on the front of the above display panel; The above glare-free film is, write; A diffusion layer installed on the upper surface of the above-mentioned substrate and including a plurality of protrusions protruding from the upper surface; and It includes a low-reflection layer installed on the upper surface of the above diffusion layer; A display device, wherein a plurality of protrusions of the layered diffusion layer protrude higher than the height of the upper surface of the low-reflection layer.

13. In paragraph 12, A display device, wherein the glossiness of the above glare-free film is 20GU or less.

14. In paragraph 12, A display device, wherein the SCI (Specular common included) reflectance of the above glare-free film is 2% or less.

15. In paragraph 12, A display device, wherein the haze of the above glare-free film is 30% or more.

Images