TW200912397A - Optical sheet with excellent adhesive force, filter comprising the same, and display device including the sheet or the filter - Google Patents

Abstract

Provided are an optical sheet, a filter including the same, and an image display device including the sheet or the filter. The optical sheet includes a light transmission portion in which a plurality of grooves spaced apart from each other at predetermined intervals are formed; and a plurality of external light absorption portions, respectively formed in the grooves, comprising a light absorbing material, wherein a surface of each of the external light absorption portions and a corresponding surface of the light transmission portion respectively have a surface roughness SR220 and a surface roughness SR210, wherein the surface roughness SR220 of the external light absorption portions is greater than the surface roughness SR210 of the corresponding surface of the light transmission portion. Therefore, the optical sheet, the filter including the same, and the image display device including the sheet or the filter can reduce ghost images and prevent the occurrence of the Moire phenomenon by having excellent adhesive force, and can maintain high resolution and have an improved electromagnetic wave shielding effect by having a relatively high contrast ratio.

Description

200912397 28559pif.doc IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to an optical sheet having excellent adhesion, an optical filter including the optical sheet, and the optical sheet or the same The image display device of the filter, and more particularly, the invention does not cause image deterioration due to excellent adhesion (such as due to layer separation - (layer) An optical sheet including a separation and a reduction of a contrast ratio to form a ghost image, a filter including the optical sheet, and an image display device including the optical sheet or the filter . [Prior Art] In recent years, various types of image display devices have been developed and used in practice. Examples of the image display device include a liquid crystal display (LCD), a plasma display panel (PDP), a field emission display (FED), a cathode ray tube (CRT), Vacuum fluorescent display (vacu leg emission display) and field emission display panel (fieid emission display panel). These image display devices emit light of three primary colors of red, blue, and green, thereby displaying a color image. Such image display devices include: a panel assernbly that forms a shirt image 'and filter light' that shields electromagnetic waves, near-infrared rays, and/or orange emitted from the panel assembly. Yellow light and features such as surface reflection prevention, color adjustment, and/or improved resolution of 200912397 28559pif.doc. The optometrist is placed on the front side of the panel assembly and, therefore, the filter should be capable of transmitting light. In addition, in a bright environment (e.g., in a bright room), the exterior surrounds the light transmission filter and is incident on the panel assembly. In this case, the ambient ambient light from the transmission filter interferes with the image light emitted from the panel assembly. Due to this, the contrast ratio in the bright environment is small, and thus the image display capability of the image display device is degraded. In order to solve this

A viewing angle control sheet is disclosed in Japanese Laid-Open Patent Publication No. 2005-338270. The viewing angle control sheet has a structure in which an external light absorbing portion having a wedge shape and containing a black light absorbing material is disposed at a predetermined interval and is in contact with the transparent light transmitting portion. Further, by forming the external light absorbing portion with a material having a smaller refractive index than the material of the light transmitting portion and the light absorbing material, the image light source incident on the external light absorbing portion in the oblique direction is totally reflected The observer is more efficiently reached, resulting in improved transmittance. However, when an optical sheet having such a configuration is attached to other elements in the filter by an adhesive layer, layer separation due to aging may easily occur. In addition, impurities such as air permeate between the layers, thereby causing a decrease in the contrast ratio and a reduction in image quality due to the formation of a double shadow. At the same time, the squadron.. 'Agriculture 1 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生 产生It is used to shield electromagnetic waves. It is used in the screen of 200912397 28559pif.doc (reflection prevention film) ^ and used in the form of a membrane filter with ^f and 7 or near-infrared ray blocking film. Instead of separately making the larger size of the screen in the image display device, the large-scale description of the electromagnetic wave shielding film, the electromagnetic wave shielding film or the expensive conduction of the process involved, requires the use of complicated film formation. In order to compensate for the single-to-Thai,,, or further use of at least one additional [invention]% wall-wave screen film can not achieve the shielding effect. The present invention provides a Xia Gu version of p & Providing an optical sheet having an exhibitor force. The present invention also provides an optical sheet having the function of electromagnetic waves. The invention adds (4) and reduces the optics of the double-wire image. The present invention also provides an anti-stop. The optical moon of phenomenon) C Moid The present invention also provides a chopper comprising the present invention and also provided by the package; 2, which has excellent image quality, excellent optical film or the filter degree, and reduced moiré phenomenon. Rabbit Magnetic Wave Shielding Effect and Analysis According to the present invention, a device is provided, which includes a light transmitting portion in which an optical sheet is formed, the optical sheets are spaced apart from each other at a predetermined interval, and a groove, the plurality of recesses are formed in the groove, the light absorbing portion of the outer portion of the light-absorbing portion, wherein the outer surface is first; the surface of the light-transmitting portion and the corresponding surface of the light-transmitting portion are respectively With t Γΐ, and surface roughness %., where the external light absorption = the surface roughness of the blade SR22G cut light transmission part of the surface roughness of the scoop, according to another "provided - kind of optical film" the optical has been 3 a transmissive portion in which a plurality of recesses are formed, the plurality of recesses being spaced apart from each other _; a plurality of external light absorbing portions, respectively: in the recesses and comprising a light absorbing material; and an electromagnetic wave shield ^, hunting _ pass The material is filled to fill the concave portion on the top of the external light absorbing portion to form 'the surface of the electromagnetic wave shielding layer and the light transmittance port have a surface roughness SR225 and the surface roughness wave 敝 layer surface roughness 狃 225 is larger than the light transmission port The surface longitude of the corresponding surface of the f-knife is based on the _% by volume of the external optical recording portion, which accounts for 2 to 50% by volume.

The electromagnetic wave shielding layer may comprise at least one selected from the group consisting of metals and gold polymers. The surface roughness SR225 of the surface roughness SR of the object and the V external light absorbing portion can be used. • 15 μm to 5 = ^ and the surface roughness SR2]q of the light transmitting portion is available. Within the perimeter, within the range of meters. The domain surface roughness SR of the 0.5 micro external light absorbing portion, the surface roughness 225 of the surface, and the magnetic wave shielding layer of the light transmitting portion satisfy the following conditions: 杈 杈 roughness SR2] 〇 10 200912397 28559pif.doc 0.1 Micron SSR220 (or SR225) — SR21d95 micron. The refractive index of the light transmitting portion may be smaller than the refractive index of the external light absorbing portion. Each of the external light absorbing portions may have a rectangular, quadrangular or trapezoidal cross section. Each of the external light absorbing portions may be disposed in a strip form, a matrix form, or a wave form. The longitudinal direction of the external light absorbing portion may not be parallel to one side of the optical sheet. The optical sheet can be a high resolution sheet. According to another aspect of the invention, there is a filter for an image display device comprising an optical sheet according to one of the embodiments described above and a chopper base. According to another aspect of the present invention, there is an image display apparatus comprising an optical sheet according to one of the embodiments described above. The present invention will now be described more specifically with reference to the accompanying drawings, in which, Fig. 1 is an exploded perspective view schematically showing the structure of an image display apparatus 1 equipped with a filter 40 including an optical sheet according to an embodiment of the present invention. Fig. 2A is an exploded cross-sectional view of a filter 40 including an optical sheet according to an embodiment of the present invention. Fig. 2B is an exploded cross-sectional view of a filter 40 including an optical sheet according to another embodiment of the present invention. In the following, the same reference numerals in the drawings denote the same elements or parts thereof. 11 200912397 28559pif.doc Mai, Fig. 1, an image display device 1 equipped with a filter 40 comprising an optical sheet according to an embodiment of the present invention comprises a housing 1 , a cover 50 covering an upper portion of the housing 1 , and a housing 50 A driving circuit substrate 20, a panel assembly 30 for forming an image, and a filter 40. The visible image formed in the panel assembly 30 by the electrical signal applied from the drive circuit substrate 20 is externally displayed via the filter 40. ~ 2A and 2B, the filter 40 includes a color adjustment film (100), an optical sheet 200, and a filter base (FB) including an anti-reflection film 5? . The color adjustment film 100 mainly contains, for example, a neon light blocking colorant, and may also include a near-infrared ray absorption compound or a colorant. The matte light blocking colorant contained in the color adjustment film 100 may be, for example, cyanine, squaiyiium, azomethine, xanthene, xanthene (xanthene) The combination of defeated n〇f or azo (where) is defined as the unnecessary light of a wavelength of about 585 nm when the gas is excited. When included in the color adjustment film, the compound may be a resin containing a copper atom, a resin containing a copper or a subdisk compound, a resin containing a copper compound or a thiourea derivative, or a resin containing a compound based on a compound. The near-infrared ray causes a smoke failure of the surrounding electrons, and thus it is necessary to block the near-infrared rays. The optical fiber 200 includes a light transmitting portion 12 formed on the base film 23〇 200912397 28559pif.doc 夕冲口丨九和收部220 And the optical sheet 200 is disposed under the adjustment film 100. The ancient film 1 is in the color shirt. The optical sheet 200 having such a structure may be (an example f and a sheet, however, the present invention is not limited to this case. High resolution in meaning A sheet that is used to resolve the resolution of the device. The image-transmissive portion 210 is transmitted through the light emitted from the panel described in the figure. The light-transmitting portion may be formed of a cured resin (cmmbleresin), and the light is transmitted. The portion 210 may be made of an acrylate resin, and the acrylic acid resin is electrically enthalpy and JiUh. In addition, the light transmitting portion 210 may be transparent, but not necessarily completely transparent, and may have the technology. The towel is generally acceptable as a transparent transparent level. The light transmitting portion 210 may generally have a shape complementary to the shape of the external light absorbing portion 22 (which will be described later), but the present invention is not limited to this case That is, the grooves are formed in the light transmitting portion 210, and are separated from each other by a predetermined interval' and include a light absorbing material and a thermoplastic resin, a thermosetting resin, or an ultraviolet curing resin. (ultra violet curable resin) forming a composition of the external light absorbing portion to fill the groove g2]G to form the external light absorbing portion 220, which will be performed later In the present embodiment, the groove gsi is formed in the side of the light transmitting portion 210 corresponding to the image light source side. However, the present invention is not limited to this case, and the groove may be formed in the light transmitting portion 210. Corresponding to the side of the observer side, the light transmitting portion 210 may have a refractive index n2] 1.3 of 1.33 to 1.6. It is difficult to manufacture the light transmitting portion 21A having a refractive index of 200912397 28559pif.doc of less than 1.33. If the refractive index n21G of the light transmitting portion is greater than U, the transmittance of the light transmitting portion 21〇 is significantly reduced' and the contrast (C〇ntraSt) rate is also decreased, resulting in a decrease in the overall resolution. 2 The surface of the 21G (i.e., the image source 1 is not as smooth as the king, but has a predetermined roughness, that is, a surface roughness of 5 μm to 0.5 μm.

C

The light transmittance of the surface rough seam SR2ig smaller than 〇.Q5 μm: J, the surface _degree% of the transmissive portion 210. Above 0.5 μm, the second image is transmitted through the light transmitting portion 21: a double image is formed. w Han shot, on the tree:: fat, thermosetting resin or UV solid compound filling is formed in the light transmission part _ minute (10). Groove g21 of ===. Form an external light absorbing part. A good bright ring "= absorbs external ambient light, and therefore, the external ί absorption = 20 resolution. In Figure 2, external light absorption === = exemplified? It is limited to the figure of FIG. 2 and _=, and the outer surface of the flat plate shape which does not include the groove faces the surface of the color adjustment film 100. When the curable resin is contained in the external light absorbing portion, the grease may be the calender transmitting portion 21. The material is the same or similar;; the tree 200912397 28559pif.doc Examples of the light absorbing material may include a black inorganic material, a black organic material, a black-oxidized metal And a mixture of at least two of these materials. When the external light absorbing portion 220 contains a black oxidized metal having a low electrical resistance, the external light absorbing portion 220 can also shield electromagnetic waves. The external light absorbing portion 220 may be formed mainly of ultra violet ray curable resin containing carbon. The refractive index n22G of the external light absorbing portion 220 may be in the range of I.% to 1.6, similar to the refractive index of the light transmitting portion 210. Further, the surface of each of the external light absorbing portions 220 (i.e., the surface on the image light source side) may have a predetermined thick chain degree, that is, the surface roughness of the 〇15 is up to 5.0 micrometers SR^ o. If the surface roughness SRmo of the external light absorbing portion 220 is less than 0.15 μm, the adhesion may be higher than the number of the bow. If the surface roughness sr^g of the external light absorbing portion 220 is greater than 5, the light is transmitted through the image light source; the defect rate may be reduced. More preferably, the surface roughness SR22 of the external first absorption portion 220 may be greater than the surface roughness SR2]G of the light transmitting portion. Most preferably, the surface roughness SRuo of the external light absorbing portion 220 and the surface roughness of the light transmitting portion 210 are sufficient for the following conditions: ^ / 0.1 μm $SR22〇-SR2] 〇3 4.95 micro_m as described above, The optical sheet 200 does not affect the image light source by adjusting the surface roughness SR of the image pupil and the surface roughness SR22 of the external light absorbing portion 22 on the image =, , and ' sides = , rate and external light absorption rate, and has excellent adhesion. That is, turn = 15 200912397 28559pif.doc ί I is 210 on the image source side surface roughness SR" °, can be divided into 210 diffuse reflectivity, and by adding external light absorption 77 shirt surface like the light source side rough Degree § R22 (), can increase the external light absorption part 220 temperament this product hit a 22 〇 whistle plus. Chiyou + ami table sticks. Here, the external light absorbing portion 220

The light absorption rate does not change. In general, the surface of the material is rough—the surface adhesion of the material is better. Here, the optical sheet 200 = the force ♦ the adhesion between the external light absorbing portion 22 〇 and the color adjustment film (10) or the filter film having another function. By increasing the standing force of the optical sheet 200, it is possible to overcome such problems as layer separation due to deterioration of adhesion and contamination of the resulting filter, deterioration in image quality, and the like. The base film 230 is disposed on the surface of the light transmitting portion 21, that is, on the surface opposite to the surface on which the external light absorbing portion 220 is formed. The base film 230 supports the light transmitting portion 21A, and the external light absorbing portion 220 is formed in the light transmitting portion 21''. The base film 230 may comprise at least one material selected from the group consisting of polyethersuiphone (PES), polyacrylate (pAR), polyetherimide (PEI), Polyethylene naphthalate (PEN), polyethylene tert-butyl phthalate (PET), polyphenylene sulfide (PSS), poly-propyl propyl ester (polyphenylene sulfide) Polyallylate), polySiimide, polycarbonate, PC, cellulose triacetate (TAC), and cellulose acetate propionate (CAP). Preferably, the base film 230 16 200912397 28559pif.doc may be made of polycarbonate (PC), polyethylene terephthalate (PE diacetate (TAC) or polyethylene naphthalate ( PEN); ^ In addition, the base film 230 may be formed of a material having a phase or similar refractive index to the material of the light transmitting portion 21A. In addition, the optical sheet 200 according to the current embodiment of the present invention may further include a protective film (protection). Flim) (as shown in Figures 3 and 3 later)

As described above, the protective film 24 is formed on the surface of the light transmitting portion 2 ι, i.e., on the surface opposite to the surface on which the base film 23Q is formed. The protective film 240 protects the optical sheet 2A until the optical sheet 2 is mounted in the filter 40. In general, when the optical sheet 2 is mounted in the filter, the protective film 240 is separated from the optical sheet 200; however, the present invention is not limited to this case. X In FIGS. 2A and 2B, the filter base (FB) is disposed on the side of the optical sheet 200, and the Qi includes an electromagnetic wave shielding fllm in the following order: 3〇〇, hard coating A coating layer 400 and an anti-reflection film 5〇〇. However, the present invention of θ is not limited to this case. That is, the electromagnetic wave shielding film 3, the hard coat layer 4 (8), and the reflection preventing enthalpy 500 may be disposed in the FB in any order, and the FB may also be a single layer formed of at least two types of materials having different functions. The electromagnetic wave shielding film 300 shields electromagnetic waves. The electromagnetic wave shielding film 3 can have various structures such as a conductive mesh layer, a metal thin flm, a high-refractive-index transparent thin film or the like At least two layers of laminated structure. In FIG. 2A and FIG. 2B, the electromagnetic wave screen 17 200912397 28559pif.doc mask film 300 takes a single layer form; however, and the electromagnetic wave shielding film 300 may have a small inclusion limited to this case, the hard coat layer 400 is resistant to the scratch, two The multilayer structure of the layer. Or the anti-mound anti-reflection film 5 〇〇 (this will be damaged when the material of the electromagnetic wave shielding film 300 is in contact with the material. The hard coating reinforced glass, ^ ^ tempered glass is formed. In addition, the hard coating gamma ^ The object is made up of ^CWb ί- I r^brd) C^xane-based)'; wide object, and can contain such as oligo (〇lig_r^:, layer can be more based on dream stone It is really filled in order to increase its hardness. Mesoscopic Ϊ = Ξ 15 (Κ) By adjusting the transmittance of visible light, the eye fatigue of the user of the long-term image display device i is minimized. The membrane leaks to adjust the transmittance of visible light, not only the selective absorption effect, but also the widening effect of the color reproduction range (the contrast ratio). In FIG. 2A and FIG. 2B, the reflection prevention j takes a single layer form. However, the present invention is not limited to this case, and the 5 ray reflection repellency may have a multilayer structure including at least two layers. The anti-hetero domain is prevented by the following original mask raying: ^ from the outside and the self-reflection preventing film The visible light reflected from the surface of 500 is later bounded by the anti-reflection film 500 and the hard coat layer 4 The reflected visible light is out of phase with each other, and thus destructive interference occurs. By mixing indium tin oxide (indium tjn 〇xjde, ιτο) with oxidized stone 18 18 200912397 28559pif.doc (silicon oxide, Si〇3) Nick chromate (nickel chromate,

A mixture of NiCr) and siiicon oxide (Si 2 ) or a similar mixture is solidified and solidified to form the anti-reflection film 5 . Further, the reflection preventing film 500 may be formed of titanium oxide (titanhim oxide) or a specific fluorine resin having a low refractive index. In the following, the specific configuration and operational effects of the light transmissive portion 210 and the external light absorbing portion 2 2 〇 will be more fully described with reference to the accompanying drawings. 3 is a cross-sectional view of an optical sheet 2 根据 according to an embodiment of the present invention. 4 is an enlarged view of a portion A of the optical sheet 200 of FIG. Referring to Figures 3 and 4, an optical sheet 2A according to the current embodiment of the present invention includes a light transmitting portion 210, a plurality of external light absorbing portions 22A, a base film 23A, and a protective film 240. In Figs. 3 and 4, each of the external light absorbing portions 22A has a four-sided 2 cross section, however, the present invention is not limited to this case. , can be performed by light press forming (_f_ing), using thermal compression of a thermoplastic resin, or by using a thermoplastic or thermosetting resin to form a groove g2 of the light transmitting portion 210 ("(10) mdding The external light absorbing portion 22 is formed to have a shape opposite to the pattern of the external light absorbing portion 22A. In addition, when the ultraviolet curable resin contained in the light transmitting portion 21A has reflection preventing Wei and electromagnetic waves In the case of a ship, (four) function, or a combination of these functions, the rotor 2 (10) can additionally perform such functions. In the optical sheet 2 of the embodiment according to the present invention, the film _. The light transmitting portion 21影像The image light == has a surface roughness sr2]g, and the external light absorbing portion 22q 19 200912397 28559pif.doc has a surface roughness on the surface of the image light source side. See Fig. 4, the light absorbing portion 220 is cut like a surface, Shape surface _ degree sr". Larger than the image source, the surface is rough. By adjusting the surface roughness k degree SR21. And SR22G, optical sheet 2 (8) maintains high light transmittance and external light absorption, and also has excellent adhesion. The light transmitting portion 210, the external light absorbing portion 220, the base wire 23G, and the protective film 24 in the w light 200. The relative position is as described above. The external light absorbing portion 22A may have various structures such as a strip, a matrix, a wave or the like. Further, the external light absorbing portion 22 is called to be spaced apart by a predetermined interval so that light is transmitted therebetween. In Fig. 3, one light absorbing portion 22G has a quadrangular cross section l and the present invention is limited to this case' and the external light absorbing portion 22Q may have a triangular opening, a trapezoidal shape, a pentagonal cross section or the like. The light is not illustrated, but according to the current embodiment of the present invention, a 稜鏡 3 稜鏡 film (prismfllm) on the surface of the j soil edge 230 of the 稜鏡 film pair, that is, the light transmitting portion 21 on the surface. The ruthenium film may be formed of the same or similar material as that of the light transmitting portion 21G. By including a ruthenium film, the optical sheet can have a light absorption rate, an increased contrast ratio, and an improved resolution, and the first transmittance is not greatly changed. In the embodiment, the external light absorbing portion 22 〇 整 is made higher than the light transmitting portion plus the refracting ray H t transmitting portion 210 and the external light absorbing portion 220 between the 卞 卞 (8 1 Ι 2 Ι 0 · η ^) Within the range of 〇.〇%△!!<0. 20 200912397 28559pif.doc Therefore, the external light absorption rate of the photonic sheet 200 is increased, resulting in a decrease in the formation of double images. The view will describe this operation. Here, the double image is generated in such a manner that the light emitted from the panel assembly 3 as described above and the external light absorbing portion 220 completely interfere with each other and reflect the external ambient light outside the county. g] Thus, a user viewing an image display device including an optical sheet views one image as two overlapping images. The principle of reducing or eliminating double images by adjusting the refractive index difference between the external light absorbing portion 220 and the light transmitting portion 21 () will now be more fully described with reference to FIG. Referring to FIG. 4, when the external ambient light L2 and L3 incident from the outside is incident on the external light absorbing portion 22, due to the difference in refractive index of the main body as described above, regardless of the incident angle, that is, regardless of What is the angle between the normal of the interface between the light transmitting portion 210 and the external light absorbing portion 2 2 与 and the light U, L2, L3 (〇, (5), θ2), and the light L1? L2 and L3 are both external light The absorbing portion 22 is completely absorbed without being reflected from the interface between the light transmitting portion 210 and the external light absorbing portion 22A. Therefore, the external light absorption rate is increased, and thus the generation of the double image is reduced. In the optical sheet 200 according to the current embodiment of the present invention, the refractive index difference (Δ〇 = n2 〇 - n22 〇) between the light transmitting portion knife 210 and the external light absorbing portion 22 可 may have a positive value. In this case, the image light incident on the interface between the light transmitting portion 21A and the external light absorbing portion 22A at an angle smaller than the critical angle & angle is completely reflected, thereby being applied to the observer side. display. As a result, separate images different from the images produced by the panel assembly 30 (i.e., dual images) are formed. Figure 5 is a partially exploded perspective view of an example 200 of a modification of the optical sheet 200 of Figure 3, 200912397 28559pif.doc, in accordance with an embodiment of the present invention. The modified example 200 illustrated in Figure 5 is designed to prevent moiré. The moiré phenomenon refers to a phenomenon in which interference fringes are formed when at least two periodic patterns overlap each other. Referring to Fig. 5, the longitudinal direction of the external light absorbing portion 200 is not parallel to one side of the optical sheet 200, and there is a bias angle α greater than 〇 therebetween. Although not illustrated in Figure 5, panel assembly 30 includes a plurality of cells that emit visible light for forming an image. The unit may be placed in a stripe form, a matrix form or a wave form, and thus is placed similar to the external light absorbing portion 220 of the optical sheet 200. In this case, when the arrangement direction of the external light absorbing portion 220 coincides with the direction in which the unit is disposed, the two patterns overlap each other, and thus a moiré phenomenon occurs. By adjusting the offset angle α between the longitudinal direction of the external light absorbing portion 220 and the longitudinal side of the light transmitting portion 210 to be larger than 〇°, the two patterns do not coincide with each other when viewed by the user, thereby preventing the moir Pattern phenomenon. Preferably, the offset angle α can be at 5. To 80. In the range. The optical sheet 200 having the configuration described above or including the optical sheet 2 is included in the image display device, and since the optical sheet 200 has a dual image of the image display device, the image can be reduced to prevent High, (d) Light that results in a high-resolution 4-moire phenomenon. The shielded electromagnetic wave of the embodiment of the present invention: a split-slice 2 containing a filter of 4:2. . The embodiment of the shielded electromagnetic wave function, should be the first cross-sectional view of the stolen 40. 22 200912397 28559pif.doc The difference between the optical sheet 2 (8) of Figs. 6A and 6B and the sheet 200 of Fig. 2 and Fig. 2 is as follows. That is, the optical of the object 6a and the figure: 200 ^ each has another electromagnetic wave shielding layer 225 formed on the less-part of the external light absorbing portion 22, and the other The electromagnetic wave shielding layer 225 is provided and the surface of the mother-electromagnetic wave shielding layer 225 has a table-length chain SR225. In this case, the surface roughness S&25 of the electromagnetic wave shielding layer 225 is larger than the surface roughness SR2] of the light transmitting portion 21A. The specific configuration, operation, and effects of the base film 23, the light transmitting portion 210, and the external light absorbing portion 22 included in the optical sheet 200 of FIGS. 6A and 6B are described with reference to the optical sheet 200 of FIGS. 2A and 2B. The group energy, operation and effect are the same, and therefore, a detailed description thereof is not provided herein. In the optical sheet 200 of FIGS. 6A and 6B, the electromagnetic wave shielding layer 225 is formed in one of the grooves g2] The external light absorbing portion 220 is not formed in the portion, that is, formed on the external light absorbing portion 22A. The electromagnetic wave shield layer 225 may comprise a metal, a metal oxide, a conductive polymer, or a mixture thereof. The metal may be copper, plaiinum, alummumi, iron, c〇balt, nickel, zinc, ruthenium, tin, Crane (tungsten), lead (Pb), silver (silver, Ag) or a mixture thereof. The metal oxide may be tin oxide (I oxide), indium oxide, antimony oxide, zinc oxide, zirconium oxide, titanium oxide, titanium oxide (titanium oxide), Magnesium oxide, silicon oxide, aluminum oxide, metal alkoxide (metal 23 200912397 28559pif.doc alkoxide), indium tin oxide (IT〇), antimony tin oxide (Ατ〇) or Its mixture. In particular, when the electromagnetic wave shielding layer 225 contains a metal oxide as compared with when the electromagnetic wave shielding layer 225 does not contain a metal oxide, oxidation or deterioration of other metals can be prevented. The electromagnetic wave shielding layer η5 is usually formed in the form of a paste ((4)(6), and then cured (c brain d) and/or dried, thereby completing the preparation. However, the present invention is not limited to this case. 1% by volume of the light absorbing portion 220, and 225 to 50% by volume of the electromagnetic wave shielding layer. If the body is based on the external light absorbing portion 220, the layer is less than 2% by volume, and the electromagnetic wave is shielded. The second is based on 100 volume 0/« of the external light absorbing portion 220, and the electromagnetic wave shielding layer 225 occupies more than 5 Ω, and the rate may be excessively reduced. If the value is greater than 50% by volume, the external light absorption is included, including the highly conductive material. The external light absorbing portion of the electromagnetic wave shielding layer 22 is fine, according to the optical device 4. The 4 product 2 = the radiance and the external light absorbing rate are not I, and the magnetic wave screen is specifically used to improve the effect of shielding the electromagnetic wave, or Fine, in which case the electromagnetic wave shielding layer is used independently. In addition, the electromagnetic wave shielding layer 225 may have a surface thick surface of the surface 225 of the surface of 0.15 micrometer to 5 2 in the shadow # roughness SR225. Degree Sr225 is less than 〇: half, right The magnetic wave shielding layer 225 may have a weaker point. If the core 2 = electromagnetic wave shielding layer roughness SR225 is greater than 5.0 micrometers, then the image cutting =, = 25 surface roughness ', the first attack rate may be reduced 24 200912397 28559pif. Doc J is more 彳 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 电磁 225 SR SR SR SR SR SR SR Condition: 〇"micron SSR225rSR - 5 micron description" # by adjusting light transmitting portion 21G on the image light source side: ^ SR2] 〇 and electromagnetic wave shielding layer 225 on the image light source side "degree Sr225, optical sheet 2 (8) does not reduce the image The light transmission of the light source, the outer absorption rate, and the outer branch absorption rate, and excellent adhesion. That is, the light transmission portion 21 can be reduced by reducing the surface edge sr" of the light transmitting portion 21 on the image light source side. The surface adhesion of the electromagnetic wave shielding layer 225 can be increased by increasing the surface roughness SR225 of the electromagnetic wave shielding surface 225 on the image light source side. Here, the electromagnetic wave shielding effect of the electromagnetic wave shielding layer does not change. Figure 7 to Figure 9 6A and 6B of the optical sheet 200, wherein FIGS. 7 to 9 correspond to FIGS. 3 to 5, that is, FIG. 7 is a cross-section of the optical sheet 2 (10) having the function of shielding electromagnetic waves according to an embodiment of the present invention. FIG. 8 is an enlarged view of a portion A of the optical sheet 2A of FIG. 7, and FIG. 9 is a portion of a modified example of the optical sheet 200 having the function of shielding electromagnetic waves of FIG. 7 according to an embodiment of the present invention. The perspective view is exploded, and the modified example is designed to prevent the moiré phenomenon. The detailed description of the optical sheet 200 of FIGS. 7 to 9 is almost the same as the detailed description of the optical of FIGS. 3 to 5 'only FIG. 7 to The optical sheet 2GG of Fig. 9 further includes an electromagnetic wave shielding layer 22: ?, wherein the surface of the electromagnetic wave shielding layer 225 has a surface roughness SR225, and therefore, a detailed description of the optical sheet 2 (8) of Figs. 7 to 9 is not provided herein. 25 200912397 28559pif.doc In the following, the present invention will be described in detail in the following examples. These examples are for illustrative purposes only and are not intended to limit the scope of the invention. Example 1 The top of the garment was formed into a shaped roll having protrusions which were in the form of an opposite to the optical sheet of the quadrangular shape. Next, 100 g of a propylene-based curing resin having a low refractive index (148) was used by using a pattern equipped with an external and external device (Hirano c〇mpany). Sartomer company ), CN981 ) is slowly and ρ added to the forming roll and the base film (that is, the thickness of 188 μm white $ optical PET film (T〇y〇b〇company)) Under the main conditions, the mixed solution is solidified. As a result, light transmission having a groove was obtained: the phase groove of the phase had a shape shape 'from the protrusion formed on the substrate and the refractive index was 1 < 48. A carbon dispersion solution (refractive index: 丨4, = cloth in the transferred groove) will be prepared by mixing 2 g of carbon black with a propylene acrylate curing resin (Sandot, CN985). Then, the obtained structure was wiped several times by a soft knife blade, thereby filling the groove uniformly with 2 liquids, and reading the 127 == absorption portion. The doctor blade is oscillated, and the light absorbing portion provides surface roughness. Next, L, externalizes the resulting product to produce a dioptric ray as illustrated in Fig. 3 to form a light transmission portion of 107.5 micrometers apart, external: Here, it is 160 μm, and the thickness of the light transmitting portion is 2 μm. 26 200912397 28559pif.doc The distance between the transmissive portions refers to the distance between the corresponding points of the adjacent external light absorbing portions. The surface analyzer measures the surface roughness of the manufactured optical sheet. As a result, the surface roughness of the light transmitting portion is 〇13 micro-picking, and the surface roughness of the external light absorbing portion is 11 〇micrometer. Concentration Shooting microscope (c〇nf〇cai

Laser Scanning Microscope ^ CLSM : LeiCa TCS SP2 粗糙度 2 1 surface roughness, and measure the surface _ degree of the external light absorbing part and the 15 parts of the light permeation, and obtain the flat example 2-1 = = = ::= Take the case between the four-sided line device (the use of ultraviolet radiation - which is cured with low-fold liquid, the result is n A)), the mixed solution has self-formed in the forming groove. The light transmitting portion 'the groove ratio is .... It will be in the shape of two ===, and the refractive grease (Sandot, c 2 propylene based solidified tree = r) is distributed in the sputum: dispersion solution (the binder formed by the folding 枓, Use the soft liquid to describe the volume of the liquid. The concave part of the volume of the near heart 200912397 28559pif.doc is formed. Then, the commercial (Ag) paste is deposited on the external light absorption. The silver is formed by the soft plastic, and then filled with the conductive material in the concave part, the structure of the region is obtained, and the ultraviolet light is used to fix the HI into the electromagnetic wave layer. The scraping; 7, in order to tear the wiping result to each -f ^ ° to produce a description as shown in Figure 3: ::: to provide a surface thick chain. Film. The moon has electromagnetic wave shielding function The ancient sound of light ^ ^ transmission center distance is 74 microns, the external light absorption part = degree is 100 microns, and the light transmission part thickness is 15 〇 micron. Use only the surface roughness analyzer of Example 1 to manufacture The surface of the optical sheet has a coarse surface H, and the surface roughness of the light-transmitting portion is 0.13 μm, and The surface roughness of the electromagnetic wave shielding layer was 1.50 μm. In addition, as a measurement result of the manufactured optical sheet, the electromagnetic wave shielding effect is shown in Table J below, and the black luminance value of the external light absorption rate is shown. At ASTM D-4935-89, the electromagnetic wave shielding is measured, and the optical disk is mounted in a panel (SDI V4 module standard) under external light of 150 lux (Cux), using CS1000 (US) Minolta Co., Ltd. was used to measure the black luminance value. f Example 2-2 An optical sheet was produced in the same manner as in Example 2-1 except that in the process of forming the concave portion, it was formed. About 20% by volume of the concave portion of the groove' and coating the concave portion with a conductive material. The surface roughness of the manufactured optical sheet was measured using the surface roughness analyzer of Example 1. Knot 28 200912397 28559pif.doc , ' ^ The surface roughness of the transmissive part is G i3 μm, and the surface roughness of the layer is 16 μm. Electromagnetic wave shielding is additionally used as the measurement result of the manufactured optical sheet =: electromagnetic wave shielding... ~(2) with instance 2_1 Phase_method manufacturing optical sheet, into the part, without the use of conductive material coating, 疋 does not form a concave swing scraping knife. Bu #和收^, and rubbing the money when not measuring the optical sheet of the two magnetic clothes The results are shown below in the table! Magnetic wave screen effect, and the black of the external light absorption rate = Table 1 ___ Analysis item

Degree (turbidity '(cdV square meters) ~~ΐ — ——0.76 Table 1, the electromagnetic shielding layer and the external light absorption part of the body production "25%: 18'75%", the electromagnetic shielding effect is '^' and black The higher the brightness (0.97-1.15) (Example 2-1 and -= 2-2). On the other hand, when the optical sheet does not contain the electromagnetic shielding layer, the film does not have the electromagnetic wave shielding effect, and the optical sheet contains the electromagnetic wave screen. «^^^Example 2·1) is blacker than the brightness. According to this result, the optical sheet containing the electromagnetic shielding layer can have significantly improved electricity; 29 200912397 28559pif.doc Wave shielding effect, and external light absorption rate The present invention has been particularly shown and described with reference to the exemplary embodiments of the present invention, and it will be understood by those skilled in the art The present invention has been described in detail with reference to the accompanying drawings. Other features and benefits will become even more It is apparent that, in the accompanying drawings: FIG. 1 is an exploded perspective view schematically illustrating the structure of an image display apparatus equipped with an optical filter including the optical sheet of the embodiment of the present invention. 2A is an exploded cross-sectional view of a filter including an optical sheet of an embodiment of the present invention. Fig. 2B is an exploded cross-sectional view of a filter including an optical sheet according to another embodiment of the present invention. Figure 4 is an enlarged view of a portion of the optical sheet of Figure 3. Figure 5 is a partially exploded perspective view of a modified example of the optical sheet of Figure 3 in accordance with an embodiment of the present invention. The modified example is designed to prevent the moiré phenomenon. Fig. 6A is an exploded cross-sectional view of the optical filter including the optical sheet having the function of shielding electromagnetic waves according to the embodiment of the present invention. An exploded cross-sectional view of an optical filter of an optical sheet having the function of shielding electromagnetic waves of 200912397 28559pif.doc according to another embodiment of the invention. Fig. 7 is a cross section of an optical sheet having a function of shielding electromagnetic waves according to an embodiment of the present invention. Figure 8 is an enlarged view of a portion A' of the optical sheet of Figure 7. Figure 9 is a partially exploded perspective view showing an example of modification of the optical moon having the function of shielding electromagnetic waves of Figure 7 according to an embodiment of the present invention, The modified example is designed to prevent the moiré phenomenon. [Main component symbol description] 1 : Image display device 10 : Housing 100 : Color adjustment film 20 : Driving circuit substrate 200 : Optical sheet 210 : Light transmitting portion 220 : External light Absorbing portion 225 - Electromagnetic wave screen layer 230: Base film 240: Protective film 30: Panel assembly 300. Electromagnetic wave screen film 40: Filter 400: Hard coat layer 50: Cover 500: Anti-reflection film 31 200912397 28559pif.doc A: Part A' of the optical sheet FB: Part FB of the optical sheet: Filter base g210: Groove L1. External ambient light L2: External ambient light L3 • External ambient light SR21: Surface roughness of the light transmitting portion SR220 , the surface roughness of the light absorbing portion of the outer portion 225, the surface roughness of the electromagnetic wave shielding layer and the normal of the interface between the light and the outer material (4) (4). The angle gate between the light transmitting portion and the external light absorbing portion and the light L3 Interface The normal 32

Claims (1)

200912397 28559pif.doc X. Patent Application Scope 1. The optical sheet comprises a groove, the plurality of grooves are defined by a predetermined portion, and t is formed with a plurality of light absorbing portions, which are respectively spaced apart by 2 Separating from each other, and a plurality of outer materials, the grooves and including light absorption wherein respective surfaces of the transmissive portions of the external light absorbing portion have a mother surface and the light roughness sr2] . Wherein the external surface area is sr22. And the surface roughness SR22〇 is larger than the surface roughness of the eight absorbing portions of the light transmitting portion. With knife: households say surface roughness SH21. . a light transmissive portion, wherein the predetermined intervals are mutually _; V s troughs' the plurality of grooves to include sucking two: and:: minutes 'which are respectively formed in the grooves ' ', = The surface of the electromagnetic wave shielding layer and the surface/knife of the light transmitting portion have a surface roughness SR225 and a surface roughness sr210, and the surface roughness sr225 of the electromagnetic wave shielding layer is greater than the light transmission 4 The surface of the surface should be rougher than the surface SR. . . The optical sheet of claim 2, wherein the electromagnetic wave shielding layer accounts for 2 to vol% based on 1% by volume of the external light absorbing portion. 4. The optical sheet of claim 2, wherein the wave shielding layer comprises at least one selected from the group consisting of a metal, a metal oxide, and a conductive polymer. 5. The optical sheet according to claim 1 or 2, wherein the surface of the portion t of the light portion is SR22G, and the surface roughness of the electromagnetic wave layer is SR22S|Q15 micro-shirt 5.G The inner diameter of the meter is in the range of 0.5 micrometers. 6. The optical sheet of claim 5, wherein the surface roughness SR22Q of the outer first absorption portion is the electromagnetic wave shielding surface roughness level 225, and the light transmission #分The table coarseness SRuo satisfies the following conditions: 0.1 micron view 22 〇 (or % 25) ~ sr, < 4, 95 μm. The glare 7 transmits the optical sheet of the first or second aspect, wherein the refractive index of the transmittance 小于 is smaller than the refractive index of the outer portion (9). 8. As claimed in the patent scope! Upper lobe, re-enactment % r: first absorption of each of the sides or:: 9 · If the scope of the patent application is 〗 〖, this film is the second one: the scope of the first or second item - optical sheet, wherein Row. The optical sheet of the first or second aspect of the invention, wherein the optical sheet is a high-resolution sheet, is the optical sheet of the first or second aspect of the invention. 12. A filter for an image display device comprising the optical sheet of claim 1 or 2, and a filter base. 13. An image display apparatus comprising the optical sheet of claim 1 or 2. 35