Anti-glare film and display device including the same

Abstract

An anti-glare film includes: a substrate; a diffusion layer disposed on an upper surface of the substrate and including a plurality of protrusions protruding from an upper surface of the diffusion layer; and a low reflection layer disposed on an upper surface of the diffusion layer. A height at which the plurality of protrusions of the diffusion layer protrude is higher than a height of an upper surface of the low reflection layer.

Description

Technical Field

[0001] This disclosure relates to an anti-glare film and a display device having the anti-glare film. Background Technology

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

[0003] The display surface in a display panel used to display images is made of glass. Because of the glass, regular reflections of external light are easily achieved. Therefore, a viewer viewing the display device may see an external scene reflected on the display surface (i.e., an external scene at the location of the display device). In other words, the display device may act as a mirror.

[0004] When external scenery is reflected on a display device, the viewer's immersion in the image displayed on the device may be reduced.

[0005] In addition, when the display device is turned off, the reflection of external scenery on the display surface is not aesthetically pleasing. Summary of the Invention [Technical Solution]

[0006] Additional aspects will be set forth in part in the description which follows, and will become apparent in part from the description itself, or may be learned by practice of the embodiments presented.

[0007] According to one or more embodiments of this disclosure, an anti-glare film may include: a substrate; a diffuse layer on an upper surface of the substrate and including a plurality of protrusions projecting from the upper surface of the diffuse layer; and a low-reflection layer on the upper surface of the diffuse layer. The plurality of protrusions of the diffuse layer may protrude to a height greater than the height of the upper surface of the low-reflection layer.

[0008] According to one or more embodiments of this disclosure, the anti-glare film may have a gloss level of 20 GU or less.

[0009] According to one or more embodiments of this disclosure, the anti-glare film may have a specular component (SCI) reflectance of 2% or less.

[0010] According to one or more embodiments of this disclosure, the ratio between the area of ​​the plurality of protrusions and the area of ​​the diffuse layer can be greater than or equal to 30% and less than or equal to 40%.

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

[0012] According to one or more embodiments of this disclosure, multiple particles can form multiple protrusions, and the diffuse layer can include flat portions thereon to anchor the multiple particles. The flat portions can be formed from a solution. The mixing ratio of the solution to the multiple particles can be 8:1.

[0013] According to one or more embodiments of this disclosure, the solution may be formed from a photocurable polymer. Multiple particles may be formed from silica.

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

[0015] According to one or more embodiments of this disclosure, the substrate may be formed from a polyethylene terephthalate (PET) film or a cellulose triacetate (TAC) film.

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

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

[0018] According to one or more embodiments of this disclosure, a display device may include: a display panel; and an anti-glare film on the front surface of the display panel. The anti-glare film may include: a substrate; a diffuse layer on the upper surface of the substrate and including a plurality of protrusions projecting from the upper surface of the diffuse layer; and a low-reflection layer on the upper surface of the diffuse layer. The plurality of protrusions of the diffuse layer may protrude to a height greater than the height of the upper surface of the low-reflection layer.

[0019] According to one or more embodiments of this disclosure, the anti-glare film may have a gloss level of 20 GU or less.

[0020] According to one or more embodiments of this disclosure, the anti-glare film may have a specular component (SCI) reflectance of 2% or less.

[0021] According to one or more embodiments of this disclosure, the diffuse layer may have a haze of 30% or greater. Attached Figure Description

[0022] These and / or other aspects, features, and advantages of some embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

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

[0024] Figure 2This is a plan view showing an anti-glare film according to one or more embodiments of the present disclosure.

[0025] Figure 3 This is a conceptual diagram illustrating a method for forming a diffuse layer of an anti-glare film according to one or more embodiments of the present disclosure.

[0026] Figure 4 This is a cross-sectional view showing a display device including an anti-glare film according to one or more embodiments of the present disclosure.

[0027] Figure 5 This is a perspective view showing a display device including an anti-glare film according to one or more embodiments of the present disclosure.

[0028] Figure 6 This illustrates one or more embodiments according to the present disclosure. Figure 5 An exploded perspective view of the display device shown.

[0029] Figure 7 This illustrates one or more embodiments according to the present disclosure. Figure 6 An exploded perspective view of the light source portion of the display device shown.

[0030] Figure 8 This illustrates one or more embodiments according to the present disclosure. Figure 6 An exploded perspective view of the light source portion of the display device shown.

[0031] Figure 9 This is an exploded perspective view showing a display device including an anti-glare film according to one or more embodiments of the present disclosure. Detailed Implementation

[0032] The various embodiments and terms used herein are not intended to limit the technical features described herein to the specific embodiments, but should be understood to include various modifications, equivalents or substitutions of the embodiments.

[0033] Similar reference numerals may be used for similar or related components in conjunction with the description in the accompanying drawings.

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

[0035] In this document, each phrase such as “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”, “at least one of A, B or C” can include any one of the items listed with the corresponding phrase or all possible combinations thereof.

[0036] The term “and / or” includes any one of the multiple related descriptive elements or a combination of multiple related descriptive elements.

[0037] Terms such as “first,” “second,” “primary,” and “secondary” may be used only to distinguish a given component from other components and do not limit the corresponding component in other ways (e.g., importance or order).

[0038] When referring to one (e.g., the first) component as “coupled” or “connected” to another (e.g., the second) component, whether or not the terms “functionally” or “communically” are used, it means that the first component can be connected to the second component directly (e.g., wired), wirelessly, or via a third component.

[0039] Terms such as “comprising” or “having” are intended to indicate the presence of the features, numbers, steps, operations, components, portions or combinations thereof described in the embodiments, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, portions or combinations thereof.

[0040] When a component is referred to as being “connected,” “coupled,” “in contact,” or “supported” by another component, this can include not only cases where the components are directly connected, coupled, in contact, or supported by each other, but also cases where the components are indirectly connected, coupled, in contact, or supported by a third component.

[0041] When a component is said to be "on" another component, this includes not only the case where the component is in contact with the other component, but also the case where there is another component between the two components.

[0042] Furthermore, the terms “front end,” “rear end,” “upper side,” “lower side,” “top,” “bottom,” etc., used in this disclosure are defined with reference to the accompanying drawings. However, the shape and position of each component are not limited by these terms.

[0043] This disclosure relates to an anti-glare film configured to enhance viewer immersion by minimizing light reflection occurring on the display surface of a display device, and a display device having an anti-glare film.

[0044] In the following text, reference will be made to Figure 1 and Figure 2 An anti-glare film 1 according to one or more embodiments of the present disclosure is described.

[0045] Figure 1 This is a partially enlarged cross-sectional view showing an anti-glare film 1 according to one or more embodiments of the present disclosure. Figure 2 This is a plan view showing an anti-glare film 1 according to one or more embodiments of the present disclosure.

[0046] refer to Figure 1 The anti-glare film 1 according to one or more embodiments of the present disclosure may include a substrate 10, a diffuse layer 20 and a low-reflection layer 30.

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

[0048] The substrate 10 can be formed of a transparent film.

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

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

[0051] As another example, substrate 10 can be formed of a triacetate cellulose membrane (TAC membrane).

[0052] The diffuse layer 20 can be configured to scatter and diffuse incident light. The diffuse layer 20 is disposed on the upper surface of the substrate 10 and may include a plurality of protrusions 22a projecting from one surface of the diffuse layer 20. The plurality of protrusions 22a can project from the upper surface of the diffuse layer 20. Due to the plurality of protrusions 22a, the diffuse layer 20 can scatter light incident from the outside.

[0053] The plurality of protrusions 22a can be configured to have a defined area ratio. For example, the plurality of protrusions 22a can be configured to occupy 50% or less of the area of ​​the diffuse layer 20. For example, the ratio of the area of ​​the plurality of protrusions 22a to the area of ​​the diffuse layer 20 can be about 30% to 40%.

[0054] exist Figure 2 In the case where the area of ​​the diffuse layer 20 is X×Y, the area of ​​the plurality of protrusions 22a refers to the sum of the cross-sectional areas of the plurality of protrusions 22a protruding from the diffuse layer 20. When the plurality of protrusions 22a are formed by a plurality of particles 22, the area of ​​the plurality of protrusions 22a refers to the sum of the plurality of maximum cross-sectional areas of the plurality of particles 22.

[0055] When the area ratio of the multiple protrusions 22a is less than 30%, the diffuse layer 20 may not be able to effectively scatter external light. In this case, the external scene (e.g., the display device 50, see...) Figure 4 The external view of the location may be reflected on the diffuse layer 20.

[0056] When the area ratio of multiple protrusions 22a exceeds 40%, the diffuse layer 20 can effectively scatter external light, but the image quality of the image displayed through the display panel 60 may be degraded.

[0057] The diffuse 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] Multiple protrusions 22a can be formed by multiple particles 22. For example, a single particle 22 can form a single protrusion 22a.

[0059] Multiple particles 22 can be fixed to the flat portion 21. The multiple particles 22 are fixed to the flat portion 21 such that the multiple particles 22 are attached to the flat portion 21 and cannot move after attachment. The lower portion 22b of each of the multiple particles 22 can be fixed by the flat portion 21, and its upper portion 22a can protrude from the upper surface of the flat portion 21. Therefore, the upper portion 22a of the particle 22 forms a protrusion.

[0060] The size of each of the plurality of particles 22 may be 2.7 ± 0.6 μm. For example, the plurality of particles 22 may be fine particles. Approximately 30% to 50% of each of the plurality of particles 22 may be exposed from one surface of the flat portion 21. For example, the upper portion 22a of the particle 22 (corresponding to approximately 30% to 50% of the particle 22) may protrude upward from the upper surface of the flat portion 21. Therefore, the protrusion 22a protruding from the upper surface of the flat portion 21 may be approximately 30% to 50% of the particle 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 smooth sphere or oval shape. The plurality of particles 22 may be formed into fragments.

[0062] The surfaces of the multiple particles 22 can be formed as rough surfaces. The surfaces of the multiple particles 22 can be formed to scatter incident light. Therefore, light incident on the multiple particles 22 can be diffusely reflected rather than regularly reflected.

[0063] Figure 1 The illustration shows a case where each of a plurality of particles 22 is formed as a sphere with a rough surface; however, this is merely for illustrative purposes, and embodiments of the present disclosure are not limited thereto. Each of the plurality of particles 22 according to the present disclosure may have inhomogeneities formed on the surface of the particle 22. The inhomogeneities of each of the plurality of particles 22 may have different sizes. As another example, the particles 22 may have spherical, oval, or irregular three-dimensional shapes.

[0064] The flat portion 21 can be formed of a transparent material capable of fixing multiple particles 22. For example, the flat portion 21 can be formed of a material capable of acting as an adhesive.

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

[0066] The flat portion 21 can be formed by a solution. For example, when the solution solidifies, the flat portion 21 of the diffuse layer 20 can be formed.

[0067] The multiple particles 22 can be formed from a material capable of scattering light incident from the outside. For example, the multiple particles 22 can be formed from silicon dioxide. As an example, the multiple particles 22 can be formed by crushing silicon dioxide.

[0068] The diffuse layer 20 can be formed in the form of a solution. For example, the diffuse layer 20 can be formed from a diffuse layer solution containing a plurality of particles 22.

[0069] In this case, the mixing ratio of the solution to the plurality of particles 22 can be 8:1. For example, the diffuse layer solution can be a mixture of solution, particles, and other materials in a ratio of approximately 8:1:1. Other materials may include additives, accelerators, etc., in addition to the plurality of particles 22.

[0070] When a diffuse layer solution containing multiple particles 22 is applied to the upper surface of the substrate 10 and the solution solidifies, a diffuse layer 20 can be formed on the upper surface of the substrate 10. At this time, when the thickness of the applied solution is less than the maximum size of the multiple particles 22, the upper portions of the multiple particles 22 can protrude above the solution to form multiple protrusions 22a. The lower portions 22b of the multiple particles 22 can be accommodated inside the diffuse layer 20. For example, the lower portions 22b of the multiple particles 22 can be fixed by the diffuse layer 20.

[0071] When the diffuse layer 20 is formed with the above structure, the haze of the diffuse layer 20 can be 30% or greater.

[0072] A low-reflection layer 30 may be disposed on the upper surface of the diffuse layer 20. The low-reflection layer 30 may be configured to minimize the reflection of external light. For example, the low-reflection layer 30 may be configured such that the specular component (SCI) reflectance is 0.5% to 1.0%.

[0073] The low-reflection layer 30 may use a low-reflection film according to the prior art. For example, the low-reflection layer 30 may include inorganic powder and an adhesive configured to bond the inorganic powder.

[0074] Inorganic powder can be formed in the form of particles. The size of the inorganic powder can be very small compared to the size of the multiple particles 22. For example, the size of the inorganic powder can be tens of times smaller than that of the particles 22. Therefore, the size of the inorganic powder is smaller than the size of the upper part (i.e., protrusion 22a) of each particle 22.

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

[0076] The thickness T of the low-reflection layer 30 can be configured to be lower than the height H of the plurality of protrusions 22a of the diffuse layer 20. Therefore, the plurality of protrusions 22a of the diffuse layer 20 can protrude above the low-reflection layer 30. In other words, the plurality of protrusions 22a of the diffuse layer 20 can protrude to a height H greater than the height (i.e., thickness T) of the upper surface of the low-reflection layer 30. For example, the plurality of protrusions 22a of the diffuse layer 20 can penetrate the low-reflection layer 30 and protrude from the upper surface of the low-reflection layer 30. The plurality of protrusions 22a can 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 configured to form the low-reflection layer 30 can be referred to as a low-reflection solution.

[0078] The low-reflection layer 30 can be formed by coating a low-reflection solution onto the upper surface of the diffuse layer 20. At this time, the low-reflection solution can be applied such that the thickness of the coating is less than the height of the plurality of protrusions 22a of the diffuse layer 20. When the low-reflection solution is applied to the upper surface of the diffuse layer 20, the low-reflection solution flows downward from the plurality of protrusions 22a of the diffuse layer 20, allowing the plurality of protrusions 22a to protrude above the low-reflection layer 30.

[0079] In order to reduce the reflectivity of external light in the anti-glare film 1 according to one or more embodiments of the present disclosure, the diffuse 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 configured to have a lower refractive index than the diffuse layer 20. In other words, the refractive index of the diffuse layer 20 can be configured to be greater than the refractive index of the low-reflection layer 30.

[0081] As another example, the diffuse layer 20 can be configured to have a lower refractive index than the low-reflection layer 30. In other words, the refractive index of the low-reflection layer 30 can be configured to be greater than the refractive index of the diffuse layer 20.

[0082] As described above, when the refractive index of the diffuse layer 20 and the refractive index of the low-reflection layer 30 are configured to be different from each other, the reflectivity of external light can be reduced.

[0083] According to one or more embodiments of the present disclosure, the anti-glare film 1 having the above structure can reduce SCI reflectivity because the plurality of protrusions 22a protruding above the low-reflection layer 30 reduce the intensity of regular reflection of external light and cause diffuse reflection of external light.

[0084] In addition, external light reflected from the low-reflection layer 30 is diffusely reflected by multiple protrusions 22a protruding from the low-reflection layer 30, thus further reducing the SCI reflectivity.

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

[0086] Furthermore, the SCI reflectance of the anti-glare film 1 according to one or more embodiments of this disclosure may be 2% or less. For example, the SCI reflectance of the anti-glare film 1 may be from about 0.9% to 1.1%.

[0087] Furthermore, the haze of the anti-glare film 1 according to one or more embodiments of this disclosure can be 30% or greater. When the haze is 30% or greater, the rainbow effect caused by birefringence can be improved, thereby reducing the external light reflection perceived by the viewer.

[0088] Therefore, the anti-glare film 1 with low reflectivity, high haze and low gloss according to one or more embodiments of the present disclosure can prevent or minimize the reflection of external scenery by the anti-glare film 1.

[0089] Table 1 below discloses the specifications of the anti-glare film 1 according to one or more embodiments of the present disclosure and the prior art for preventing external scene reflections on the display device 50 (see Table 1). Figure 4 A comparison of the specifications of various films on the display surface.

[0090] [Table 1]

[0091] Referring to Table 1, a conventional AGLR film (i.e., an anti-glare low-reflection film according to the prior art) has an SCI reflectance of 0.4% to 1.5%, similar to the SCI reflectance of the anti-glare film 1 according to one or more embodiments of the present disclosure. However, the haze of the conventional AGLR film is 5% to 20%, less than that of the anti-glare film 1 according to one or more embodiments of the present disclosure. Furthermore, the gloss of the conventional AGLR film is 30 GU to 40 GU, greater than that of the anti-glare film 1 according to one or more embodiments of the present disclosure. Therefore, since the conventional AGLR film has less haze and greater gloss compared to the anti-glare film 1 according to one or more embodiments of the present disclosure, external scenery is reflected better in the conventional AGLR film compared to the anti-glare film 1 according to one or more embodiments of the present disclosure.

[0092] The LR film (i.e., low-reflection film) has an SCI reflectance of 0.5% to 0.8%, which is lower than the SCI reflectance of the anti-glare film 1 according to one or more embodiments of the present disclosure. However, the haze of the LR film is 0.5%, which is significantly lower than the haze of the anti-glare film 1 according to one or more embodiments of the present disclosure. Furthermore, the gloss of the LR film is 50 GU to 60 GU, which is greater than the gloss of the anti-glare film 1 according to one or more embodiments of the present disclosure.

[0093] Therefore, since the LR film has less haze and greater gloss compared to the anti-glare film 1 according to one or more embodiments of the present disclosure, the external scene is reflected better in the LR film compared to the anti-glare film 1 according to one or more embodiments of the present disclosure.

[0094] The AG film (i.e., anti-glare film) has an SCI reflectance of 4.5%, which is significantly higher than the SCI reflectance of the anti-glare film 1 according to one or more embodiments of the present disclosure. However, the haze of the AG film is 20% to 50%, similar to or greater than the haze of the anti-glare film 1 according to one or more embodiments of the present disclosure. Furthermore, the gloss of the AG film is 10 GU to 25 GU, which is greater than the gloss of the anti-glare film 1 according to one or more embodiments of the present disclosure.

[0095] Therefore, since the SCI reflectance and gloss of the AG film are greater than those of the anti-glare film 1 according to one or more embodiments of the present disclosure, the external scene is reflected better in the AG film compared to the anti-glare film 1 according to one or more embodiments of the present disclosure.

[0096] When an anti-glare film 1 having the above structure according to one or more embodiments of the present disclosure is disposed on a display device 50 (see...) Figure 4When displayed on the front surface of the display device 50, the phenomenon of external scene reflections perceived by the viewer can be reduced, thereby improving the image quality of the display device 50. Therefore, the viewer's immersion in the image displayed on the display device 50 can be enhanced.

[0097] In the following, a method for manufacturing an anti-glare film 1 according to one or more embodiments of the present disclosure will be described.

[0098] A method for manufacturing an anti-glare film 1 according to one or more embodiments of the present disclosure may include: preparing a substrate 10; forming a diffuse layer 20 on the upper surface of the substrate 10; and forming a low-reflection layer 30 on the upper surface of the diffuse layer 20.

[0099] The substrate 10 can be formed from an optical PET film.

[0100] A diffuse layer solution can be coated onto the upper surface of the substrate 10 to form a diffuse layer 20. In this case, the diffuse layer 20 can be formed by using a pair of rollers 101 and 102, such that the plurality of protrusions 22a of the diffuse layer 20 have a certain height.

[0101] Figure 3 This is a conceptual diagram illustrating a method for forming a diffuse layer 20 of an anti-glare film 1 according to one or more embodiments of the present disclosure.

[0102] refer to Figure 3 The substrate 10 passes between a pair of rollers 101 and 102. Based on the direction of movement of the substrate 10 (arrow direction), a coating nozzle 110 configured to coat a diffuse layer solution can be provided upstream of the pair of rollers 101 and 102.

[0103] The diffuse layer solution can be coated onto the upper surface of the substrate 10 through the coating nozzle 110. At this time, the diffuse layer solution contains a plurality of particles 22.

[0104] As the diffuse layer solution coated onto the substrate 10 passes between a pair of rollers 101 and 102, the rollers 101 and 102 uniformly distribute the height of the plurality of protrusions 22a projecting from the upper surface of the diffuse layer solution. Here, the height of the plurality of protrusions 22a refers to the height from the upper surface of the substrate 10 to the top of each of the plurality of protrusions 22a. The height of the plurality of protrusions 22a can be limited by the gap G between the pair of rollers 101 and 102.

[0105] When the diffuse layer solution coated onto the substrate 10 passes through a pair of rollers 101 and 102, the diffuse layer solution flows downward from the top of the plurality of particles 22 and becomes flat, and the top of the plurality of particles 22 protrudes above the diffuse layer solution.

[0106] After a certain period of time, the diffuse layer solution hardens to form a flat portion 21 attached to the substrate 10, and the upper parts 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] After forming a diffuse layer 20 on the upper surface of the substrate 10, a low-reflection layer 30 is formed on the upper surface of the diffuse layer 20.

[0108] A solution can be used to form the low-reflection layer 30. For example, the low-reflection layer 30 can be formed by coating a low-reflection solution onto the upper surface of the diffuse layer 20. In this case, the low-reflection solution is coated such that the thickness of the low-reflection solution is less than the height of the plurality of protrusions 22a of the diffuse layer 20. In other words, the low-reflection solution is coated such that the height of the low-reflection solution coated onto the upper surface of the flat portion 21 of the diffuse layer 20 is lower than the height of the plurality of protrusions 22a (i.e., the height of the upper part of the plurality of particles 22).

[0109] When the low-reflection solution is coated onto the upper surface of the diffuse layer 20, the low-reflection solution flows downward from the plurality of protrusions 22a of the diffuse layer 20, allowing the plurality of protrusions 22a to protrude above the low-reflection layer 30. Therefore, the low-reflection layer 30 can be formed around the plurality of protrusions 22a.

[0110] When the above-described roller method is used to manufacture the anti-glare film 1 according to one or more embodiments of the present disclosure, the height of the plurality of protrusions 22a protruding from the low-reflection layer 30 can be formed to a certain value. For example, the plurality of protrusions 22a protruding from the low-reflection layer 30 can be formed to have a height smaller than the defined value.

[0111] In the following text, reference will be made to Figure 4 A display device 50 including an anti-glare film 1 is described according to one or more embodiments of the present disclosure.

[0112] Figure 4 This is a cross-sectional view showing a display device 50 including an anti-glare film 1 according to one or more embodiments of the present disclosure.

[0113] refer to Figure 4 The display device 50 according to one or more embodiments of the present disclosure may include a display panel 60, an anti-glare film 1, and a housing 70.

[0114] Display panel 60 can be configured to display images. Display panel 60 may include a liquid crystal display (LCD) panel, a light-emitting diode (LED) display panel, an organic light-emitting diode (OLED) display panel, or a quantum dot display panel.

[0115] An anti-glare film 1 is applied to the front surface of the display panel 60. Viewers can view images displayed on the display surface of the display panel 60 through the anti-glare film 1.

[0116] The anti-glare film 1 may include a substrate 10, a diffuse layer 20, and a low-reflection layer 30. The anti-glare film 1 is the same as in the above embodiment; therefore, its repeated description is omitted.

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

[0118] Furthermore, the anti-glare film 1 according to one or more embodiments of this disclosure may have an SCI reflectance of 2% or less. For example, the anti-glare film 1 may have an SCI reflectance of about 0.9% to 1.1%.

[0119] In addition, the anti-glare film 1 according to one or more embodiments of the present disclosure may have a haze of 30% or greater.

[0120] Therefore, the anti-glare film 1 according to one or more embodiments of the present disclosure has low reflectivity, high haze and low gloss, which makes it possible to prevent or minimize external scene reflections on the anti-glare film 1.

[0121] The housing 70 can be configured to house the display panel 60. In other words, the display panel 60 is disposed inside the housing 70, and the front surface of the display panel 60 forms a display surface for displaying images. An opening is formed on the front surface of the housing 70 to expose the display surface of the display panel 60.

[0122] Therefore, the display device 50 according to one or more embodiments of the present disclosure can prevent or minimize external scene reflections on the display surface because an anti-glare film 1 with low reflectivity, high haze, and low gloss is provided on the display surface of the display device 50. Thus, the viewer's immersion in the image displayed on the display device 50 can be improved.

[0123] Furthermore, since the display device 50 according to one or more embodiments of the present disclosure has an anti-glare film 1 with low reflectivity, high haze, and low gloss disposed on the display surface, external scenery is not clearly reflected on the display surface when the display device 50 is turned off. Therefore, the aesthetic effect of the display device 50 as an interior decoration can be improved.

[0124] Figure 5 This is a perspective view showing a display device 50 including an anti-glare film 1 according to one or more embodiments of the present disclosure.

[0125] Display device 50 is a device that processes image signals received from the outside and displays the processed image so that it can be visually recognized. In the following description, a television (TV) is used as an example of display device 50, but display device 50 is not limited to this. For example, display device 50 can be implemented in various forms, such as a monitor, a portable multimedia device, a portable communication device, etc. The form of display device 50 is not limited, as long as it is a device capable of displaying images.

[0126] refer to Figure 5 The display device 50 may include: a housing 70; a display panel 60 configured to display an image; an anti-glare film 1 disposed on the front surface of the display panel 60; and a bracket 80 disposed on the underside of the housing 70 to support the housing 70.

[0127] The housing 70 forms the exterior of the display device 50. Various components of the display device 50 used for displaying images and performing various functions can be housed inside the housing 70.

[0128] Figure 5 The housing 70 shown is flat, but the shape of the housing 70 is not limited to this. For example, the housing 70 may have a curved panel shape.

[0129] The display panel 60 can be configured to display a forward-facing image. The display panel 60 may include a self-emissive display element or a receiver-emissive display element. A self-emissive display element can visually output an image by emitting its own light without the need for a separate light source.

[0130] For example, light-emitting diodes (LEDs), organic light-emitting diodes (OLEDs), quantum dot organic light-emitting diodes (QD-OLEDs), and micro LEDs made of inorganic light-emitting materials can be components that emit light on their own based on the applied current.

[0131] A receiver-emitting display element may include a separate light source for visually outputting an image. For example, a receiver-emitting display element, such as a liquid crystal display (LCD), can change the arrangement of liquid crystals by means of an electric current, but requires a separate light source to visually output an image through the changed liquid crystal arrangement.

[0132] The 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-emissive display element and a display panel 60 having a receiving-emissive display element.

[0133] For ease of description, a display panel 60 including a receiving-emitting display element will be described below as an example. However, in the case of a display panel 60 including a self-emitting display element, the light source portion 200 described below is not included.

[0134] refer to Figure 5 An anti-glare film 1, according to one or more embodiments of the present disclosure, is disposed on the front surface of the display panel 60. A viewer can view an image displayed on the front surface of the display panel 60 through the anti-glare film 1.

[0135] The anti-glare film 1 may include a substrate 10, a diffuse layer 20, and a low-reflection layer 30. Since the anti-glare film 1 is the same as the above embodiment, its repeated description is omitted.

[0136] The bracket 80 is configured to stably support the housing 70. Figure 5 In this case, the bracket 80 is disposed on the underside of the housing 70, but the bracket 80 is not limited thereto. As another example, the bracket 80 may be disposed at the rear of the display device 50 and configured to support the housing 70 by fixing the housing 70 to a wall.

[0137] Figure 6 This illustrates one or more embodiments according to the present disclosure. Figure 5 An exploded perspective view of the display device 50 shown.

[0138] refer to Figure 6 Various components can be disposed inside the housing 70 to display images. For example, the housing 70 may be provided with: a light source portion 200, which is a surface light source; a display panel 60, configured to block or transmit light emitted from the light source portion 200; a control portion 91, configured to control the operation of the light source portion 200 and the display panel 60; and a power supply 92, configured to supply power to the light source portion 200 and the display panel 60.

[0139] The display panel 60 is positioned in front of the light source portion 200 and is configured to block or transmit light emitted from the light source portion 200 to form an image. For example, the display panel 60 may be formed as a liquid crystal panel.

[0140] Additionally, the housing 70 may include a frame 71, a frame intermediate mold 72, a chassis base plate 73, and a rear cover 74, which is configured to support and secure the display panel 60, the light source portion 200, the control portion 91, and the power supply 92.

[0141] The light source section 200 may include a point light source configured to emit monochromatic light or white light, and may be configured to refract, reflect, and scatter light to convert the light emitted from the point light source into uniform surface light. For example, the light source section 200 may include: a plurality of light sources configured to emit monochromatic light or white light; a diffuser configured to diffuse light incident from the plurality of light sources; a reflector configured to reflect light emitted from the rear surface of the diffuser and the plurality of light sources; and an optical sheet configured to refract and scatter light emitted from the front surface of the diffuser.

[0142] The light source 200 can emit uniform surface light forward by refracting, reflecting and scattering the light emitted from the light source.

[0143] The control unit 91 may include control circuitry configured to control the operation of the display panel 60 and the light source unit 200. The control circuitry may be configured to process image data received from an external content source, send image data to the display panel 60, and send dimming data to the light source unit 200.

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

[0145] The control section 91 and the power supply 92 can be implemented as a printed circuit board and various circuits mounted on the printed circuit board. For example, the power supply circuit may include capacitors, coils, resistors, processors, etc., and a power supply circuit board on which these components are mounted. Additionally, the control circuit may include a memory, a processor, and a control circuit board on which these components are mounted.

[0146] In the following text, reference will be made to Figure 7 and Figure 8 The structure of the light source section 200 is described in detail.

[0147] Figure 7 This illustrates one or more embodiments according to the present disclosure. Figure 6 An exploded perspective view of the light source portion of the display device shown. For reference, Figure 7 The direct-type light source section is shown.

[0148] refer to Figure 7 The light source portion 200 may include: a light source assembly 210 configured to generate light; a reflector 220 configured to reflect light; a diffuser 230 configured to uniformly diffuse light; and an optical sheet 240 configured to enhance the brightness of the emitted light.

[0149] The light source assembly 210 may include: a plurality of light sources 211 configured to emit light; and a plate 212 configured to support and fix the plurality of light sources 211.

[0150] Multiple light sources 211 can be arranged in a defined pattern to emit light with uniform brightness. The multiple light sources 211 can be arranged at regular intervals. For example, as... Figure 7 As shown, multiple light sources 211 can be arranged such that their rows and columns are aligned. In other words, multiple light sources 211 can be arranged such that four adjacent light sources roughly form a square. However, the arrangement of multiple light sources 211 is not limited to this. In addition, multiple light sources 211 can be arranged in various patterns, as long as they can emit light with uniform brightness.

[0151] The light source 211 can be implemented as an element configured to emit monochromatic light (light of a specific wavelength, such as blue light) or white light (e.g., light mixed with red, green and blue light) in various directions when powered. For example, the light source 211 may include a light-emitting diode (LED).

[0152] Board 212 can fix multiple light sources 211 so that the position of the light sources 211 does not change. In addition, board 212 can be configured to supply power to multiple light sources 211, so that multiple light sources 211 emit light.

[0153] The board 212 can be made of synthetic resin, tempered glass, printed circuit board (PCB), etc., on which multiple light sources 211 are fixed and conductive power lines for supplying power to the light sources 211 are formed.

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

[0155] Multiple through holes 121 are formed in the reflector 220 at positions corresponding to the multiple 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 121 and protrude in front of the reflector 220. The light sources 211 can be inserted into the through holes 121. Thus, the multiple light sources 211 can emit light in front of the reflector 220.

[0156] Multiple light sources 211 can emit light in various directions in front of the reflector 220. Light can be emitted from the light sources 211 towards the diffuser 230. Additionally, light can be emitted from the light sources 211 towards the reflector 220.

[0157] The reflector 220 can reflect light emitted toward the reflector 220 toward the diffuser 230. In other words, the reflector 220 can reflect light incident from the light source 211 toward the diffuser 230.

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

[0159] Light emitted from light source 211 passes through diffuser plate 230 and optical sheet 240. When light is incident on diffuser plate 230 and optical sheet 240, some of the incident light is reflected on the surfaces of diffuser plate 230 and optical sheet 240. Reflector 220 can reflect the light reflected by diffuser plate 230 and optical sheet 240 back to diffuser plate 230.

[0160] The diffuser plate 230 can be positioned in front of the light source assembly 210 and the reflector 220, and can be configured to uniformly disperse the light emitted from the light source 211 of the light source assembly 210.

[0161] Multiple light sources 211 are located at various positions at the rear of the light source section 200. The multiple light sources 211 are arranged at equal intervals at the rear of the light source section 200, but brightness non-uniformity may occur depending on the position of the multiple light sources 211.

[0162] The diffuser plate 230 can be configured to diffuse light emitted from multiple light sources 211 in order to eliminate or mitigate brightness non-uniformity caused by the multiple light sources 211. In other words, the diffuser plate 230 can be configured such that non-uniform light from the multiple light sources 211 passes through the diffuser plate 230 and becomes uniform light, and then the uniform light is uniformly emitted from the front surface of the diffuser plate 230.

[0163] Optical sheet 240 may include various types of sheets used to improve brightness and brightness uniformity. For example, optical sheet 240 may include diffuser 241, first prism sheet 242, second prism sheet 243, reflective polarizer 244, etc.

[0164] The diffuser 241 can be configured to diffuse light to ensure uniformity of brightness. Light emitted from the light source 211 can be diffused by the diffuser plate 230 and can be further diffused by the diffuser 241 included in the optical sheet 240.

[0165] The first prism sheet 242 and the second prism sheet 243 can be configured to increase brightness by concentrating the light diffused by the diffuser sheet 241. Each of the first prism sheet 242 and the second prism sheet 243 may include a prism pattern in the shape of a triangular prism. Multiple prism patterns may be arranged adjacent to each other to form multiple strip shapes.

[0166] The reflective polarizer 244 is a polarizing film and can be configured to transmit some of the incident light and reflect some of the incident light to improve brightness. For example, the reflective polarizer 244 can transmit polarized light in the same direction as the predetermined polarization direction of the reflective polarizer 244 and reflect polarized light in a direction different from the polarization direction of the reflective polarizer 244.

[0167] Furthermore, the light reflected by the reflective polarizer 244 can circulate within the light source section 200. This light circulation can improve the brightness of the display device 50.

[0168] Optical film 240 is not limited to Figure 7 The sheet or film shown may include various sheets or films, such as protective sheets, etc.

[0169] Figure 8This illustrates one or more embodiments according to the present disclosure. Figure 6 An exploded perspective view of the light source portion of the display device shown. For reference, Figure 8 The edge-type light source section 200 is shown.

[0170] refer to Figure 8 The light source portion 200 may include: a light source assembly 210 configured to emit light; a light guide plate 250 configured to disperse light; a reflector 220 configured to reflect light; and an optical sheet 240 configured to increase light brightness.

[0171] The light source assembly 210 may include: a plurality of light sources 211 configured to emit light; and a plate 212 configured to support and fix the plurality of light sources 211.

[0172] Multiple light sources 211 can be evenly arranged in Figure 8 The light source portion 200 shown is located on one side and can be configured to emit light toward the center of the light source portion 200.

[0173] Multiple light sources 211 can be arranged at equal intervals so that the light emitted from the multiple light sources 211 has the most uniform brightness possible. For example, as Figure 8 As shown, multiple light sources 211 can be arranged at equal intervals on the left and right sides of the light source section 200. However, the arrangement of the light sources 211 is not limited to... Figure 8 The arrangement is shown. The light source 211 can be arranged only on one side of the light source section 200, either the left or the right.

[0174] The light source 211 can be implemented as an element configured to emit monochromatic light (light of a specific wavelength, such as blue light) or white light (light mixed with various wavelengths) in various directions when powered. For example, the light source 211 may include a light-emitting diode (LED).

[0175] The plate 212 can be configured to support and fix multiple light sources 211 so that the position of the light sources 211 does not change. In addition, the plate 212 can be configured to supply power to the multiple light sources 211, so that the multiple light sources 211 emit light.

[0176] Plate 212 can be disposed on one side of light source section 200 together with multiple light sources 211. For example, as Figure 8 As shown, plate 212 can be positioned on the left and right sides of the light source section 200. However, the arrangement of plate 212 is not limited to this. Figure 8 The arrangement shown. Plate 212 can be arranged only on one side of the light source section 200, either the left or the right.

[0177] The board 212 can be made of synthetic resin, tempered glass, printed circuit board (PCB), etc., on which multiple light sources 211 are fixed and conductive power lines for supplying power to the light sources 211 are formed.

[0178] The light guide plate 250 can be configured to change the direction of light incident from the light source assembly 210 on one side of it and emit light in front of it.

[0179] Additionally, the light guide plate 250 can be configured to disperse and emit light incident from the light source assembly 210 on one side of the light guide plate 250 in front of the light guide plate 250.

[0180] For example, in order to change the direction of light propagation, multiple raised stripes can be formed on the front surface of the light guide plate 250, and multiple dots can be formed on the rear surface of the light guide plate 250.

[0181] Since the light source assembly 210 is located on one side of the light source portion 200, brightness non-uniformity may occur depending on the position of the light source assembly 210. Therefore, the light guide plate 250 can be configured to diffuse the light emitted from the light source assembly 210 within the light guide plate 250 to eliminate or mitigate brightness non-uniformity caused by the position of the light source assembly 210.

[0182] For example, to diffuse light, the light guide plate 250 can be milky white. Light incident on the light guide plate 250 can propagate in various directions depending on the angle of incidence.

[0183] The light guide plate 250 can be formed from polymethyl methacrylate (PMMA), transparent polycarbonate (PC), etc.

[0184] The reflector 220 can be disposed at the rear of the light guide plate 250 and can be configured to reflect light emitted through the rear surface of the light guide plate 250.

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

[0186] Optical sheet 240 may include various types of sheets used to improve brightness and brightness uniformity. For example, optical sheet 240 may include diffuser 241, first prism sheet 242, second prism sheet 243, and reflective polarizer 244.

[0187] The diffuser 241 can be configured to diffuse light to ensure uniformity of brightness. Light emitted from the light source 211 can be diffused by the light guide plate 250 and can be further diffused by the diffuser 241 included in the optical sheet 240.

[0188] Light passing through diffuser 241 is diffused in a direction parallel to diffuser 241, thereby reducing brightness.

[0189] The first prism sheet 242 and the second prism sheet 243 can be configured to increase brightness by concentrating the light diffused by the diffuser sheet 241.

[0190] The first prism sheet 242 and the second prism sheet 243 may include prism patterns in the shape of triangular prisms. Multiple prism patterns may be arranged adjacently to form multiple strip shapes. In this case, the direction in which the prism pattern of the first prism sheet 242 is arranged and the direction in which the prism pattern of the second prism sheet 243 is arranged may be orthogonal to each other.

[0191] Light passing through the first prism 242 and the second prism 243 can have a viewing angle of about 70 degrees, and the brightness can be increased because the light propagates in front of the light source section 200.

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

[0193] Furthermore, the light reflected by the reflective polarizer 244 can circulate within the light source section 200. This light circulation can improve the brightness of the display device 50.

[0194] Optical film 240 is not limited to Figure 8 The sheet or film shown may include various sheets or films, such as protective sheets, etc.

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

[0196] refer to Figure 9 Various components can be housed in the housing 70 (see Figure 5 The internal components are used to display images. For example, the housing 70 may include: a display panel 60 configured to display images; a control unit 91 configured to control the operation of the display panel 60; and a power supply 92 configured to supply power to the display panel 60.

[0197] The display panel 60 may include a self-emissive display element. The self-emissive display element can be configured to visually output images by emitting its own light, without the need for a separate light source.

[0198] For example, self-emissive display elements may include light-emitting diodes (LEDs), organic light-emitting diodes (OLEDs), quantum dot organic light-emitting diodes (QD-OLEDs), and micro LEDs made of inorganic light-emitting materials.

[0199] A cover glass 61 may be provided on the front side of the display panel 60. An anti-glare film 1 according to one or more embodiments of the present disclosure may be provided on the front surface of the cover glass. A viewer can view the image displayed on the front surface of the display panel 60 through the anti-glare film 1.

[0200] The anti-glare film 1 may include a substrate 10, a diffuse layer 20, and a low-reflection layer 30. Since the anti-glare film 1 is the same as the above embodiment, its repeated description is omitted.

[0201] Additionally, the housing 70 may include a frame 71, a frame intermediate mold 72, a chassis base plate 73, and a rear cover 74, which is configured to support and secure the display panel 60, the control section 91, and the power supply 92.

[0202] The control unit 91 may include control circuitry configured to control the operation of the display panel 60. The control circuitry may be configured to process image data received from an external content source and send the image data to the display panel 60 to display an image.

[0203] Power supply 92 can supply power to display panel 60, enabling display panel 60 to display images.

[0204] The control section 91 and the power supply 92 can be implemented as a printed circuit board and various circuits mounted on the printed circuit board. For example, the power supply circuit may include capacitors, coils, resistors, processors, etc., and a power supply circuit board on which these components are mounted. Additionally, the control circuit may include a memory, a processor, and a control circuit board on which these components are mounted.

[0205] The display device 50 described above can prevent or minimize external reflections on the front surface of the display panel 60 by providing an anti-glare film 1 according to one or more embodiments of the present disclosure on the front surface of the display panel 60.

[0206] In the foregoing, this disclosure has been shown and described with reference to various embodiments. However, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this disclosure as defined by the appended claims and their equivalents.

Claims

1. An anti-glare film, comprising: substrate; A diffuse layer on the upper surface of the substrate and including a plurality of protrusions extending from the upper surface of the diffuse layer; as well as A low-reflection layer is placed on the upper surface of the diffuse layer. The plurality of protrusions in the diffuse layer protrude to a height greater than the height of the upper surface of the low-reflection layer.

2. The anti-glare film according to claim 1, wherein, The gloss level of the anti-glare film is 20 GU or less.

3. The anti-glare film according to claim 1, wherein, The anti-glare film has a specular component (SCI) reflectance of 2% or less.

4. The anti-glare film according to claim 1, wherein, The ratio between the area of ​​the plurality of protrusions and the area of ​​the diffuse layer is greater than or equal to 30% and less than or equal to 40%.

5. The anti-glare film according to claim 1, wherein, The haze of the diffuse layer is 30% or greater.

6. The anti-glare film according to claim 1, wherein, The plurality of protrusions are a plurality of particles, wherein the diffuse layer further includes a flat portion thereon to anchor the plurality of particles. The flat portion is formed by a solution, and The mixing ratio of the solution to the plurality of particles is 8 to 1.

7. The anti-glare film according to claim 6, wherein, The solution is a photocurable polymer, and The plurality of particles are silicon dioxide.

8. The anti-glare film according to claim 6, wherein, The size of the plurality of particles is 2.7 ± 0.6 μm.

9. The anti-glare film according to claim 1, wherein, The substrate is a polyethylene terephthalate (PET) film or a cellulose triacetate (TAC) film.

10. The anti-glare film according to claim 9, wherein, The PET film is an optical PET film containing a UV absorber or an optical PET film manufactured by a uniaxial / biaxial stretching method.

11. The anti-glare film according to claim 1, wherein, The refractive index of the diffuse layer is not equal to the refractive index of the low-reflection layer.

12. A display device, comprising: Display panel; as well as An anti-glare film is provided on the front surface of the display panel. The anti-glare film comprises: substrate; A diffuse layer on the upper surface of the substrate and including a plurality of protrusions projecting from the upper surface of the diffuse layer; and A low-reflection layer is placed on the upper surface of the diffuse layer. The plurality of protrusions in the diffuse layer protrude to a height greater than the height of the upper surface of the low-reflection layer.

13. The display device according to claim 12, wherein, The gloss level of the anti-glare film is 20 GU or less.

14. The display device according to claim 12, wherein, The anti-glare film has a specular component (SCI) reflectance of 2% or less.

15. The display device according to claim 12, wherein, The haze of the anti-glare film is 30% or greater.

Images