201007226 iiyyjpiti 六、發明說明： 【發明所屬之技術領域】 本發明是有關於光學板、包含該光學板之濾光器以及 包含該光學板或該濾光器之影像顯示裝置。更特定而言， 本發明是有關於能夠藉由減低缺陷可視度（如白線可視度 及其他缺陷可視度）、增加光透射且藉由抑制對比率 (contrast ration)的減小而增加影像解析度來改良影像品質 及生產良率的光學板，包含該光學板之濾光器以及包含該 光學板或該濾光器的影像顯示裝置。 相關專利申請案之交叉參考 本申請案主張2008年7月23日在韓國智慧財產局申 請之韓國專利申請案第10-2008-0071909號之權益，該專 利申請案之揭露内容以全文引用之方式併入本文中。 【先前技術】 近來’已開發出各種類型之影像顯示裝置。此些影像 顯示裝置之實例包含液晶顯示器（liquid crystal display， LCD )、電聚顯示面板（plasma display pane卜 PDP )、場發 射顯示器（field emission display，FED )、陰極射線管 (cathode ray tube ’ CRT)、真空螢光顯示器以及場發射顯 示面板。此等影像顯示裝置藉由實現如紅光、藍光及綠光 之三種原光的發射來顯示彩色影像。 此些影像顯示裝置通常包含：面板總成(assembly)， 其形成影像；以及濾光器’其屏蔽電磁波、近紅外線及/ 或自該面板總成發射的橘色光，且具有例如防止表面反射 201007226 ^lyyjpul 及/或調節色彩之功m器應滿紐光度之要求，因為 濾光器安置於面板總成之前側。 然而，濾光器會吸收且/或反射自面板總成發射之光， 因此減小影像顯示裝置之亮度。另外，在明亮的環境下（例 如’在明亮的房間中）’外部環境光穿過影像顯示裝置的滤 光器，且可能會進入面板總成。就此而言，從外部穿過濾 光器的外部環境光可能會干擾從面板總成發射的光，從而 • 減小明亮的房間中的對比率，且減低影像顯示裝置的影像 顯示能力。 為了解決此等問題，可使用光學板。一般而言，習知 光學板包含楔形外部光吸收部分，所述部分包含可吸收光 的材料，且以預定間隔安置於透明的光透射部分中。由於 外部光吸收部分吸收外部環境光，因此影像之對比率得以 改良。 一般而言’藉由用可吸收光之材料來填充光透射部分 中的多個凹槽以形成外部光吸收部分。然而，所述凹槽每 一者不完全填充有可吸收光的材料，且凹槽中的每一者的 一部分形成光學板的凹陷部分。另外，填充凹槽中之每一 者的可吸收光的材料的量可不同。因此’在多個外部光吸 收部分中，兩個鄰近的外部光吸收部分之凹陷部分（亦即， 光透射部分之凹槽中未填充有外部光吸收部分的部分）可 能具有非常不同的深度。因此，當使用包含此光學板之影 像顯示裝置時’可能會在螢幕上看到白線，且觀看者可能 會認為影像之品質較差。 201007226 3iyv3pm 【發明内容】 本發明提供一種能夠減低缺陷可視度（例如白線可視 度及其他缺陷可視度）並改良影像之品質及生產良率的光 學板。 本發明亦提供一種能夠改良明亮環境中之對比率的 光學板' 本發明亦提供一種包含該光學板之濾光器。 本發明亦提供一種包含該光學板或該濾光器之影像 顯示裝置’其中該光學板能夠減低缺陷可視度（例如白線 可視度及其他缺陷可視度）’並改良影像之品質及生產良 率。 根據本發明之一態樣，提供一種光學板，其包含：光 透射部分’其包含多個在光透射部分之對應於影像光源侧 或觀察者侧之一端彼此間隔開的凹槽；以及多個外部光吸 收部分，其填充所述凹槽，且包含可吸收光的材料，其中 所述凹槽中之每一者的未填充有外部光吸收部分的至少一 部分形成具有一個開口侧的凹陷部分，且凹陷部分中之彼 此鄰近的兩個凹陷部分的最大深度之間的差Ad滿足以下 條件：0.01 μιη S |Δ(1| $ 1 μιη。 當使用ASTM D1003來量測時，光學板之濁度值(haze value) (%H)可在5%至25%之範圍内。 外部光吸收部分之寬度可在1〇0〇1至4〇0111之範圍 内’且凹陷部分之最大深度在〇丨口瓜至肋卜瓜之範圍内。 外部光吸收部分之高度可在5〇#111至2〇〇μπι之範圍 201007226201007226 iiyyjpiti VI. Description of the Invention: [Technical Field] The present invention relates to an optical plate, a filter including the optical plate, and an image display device including the optical plate or the optical filter. More particularly, the present invention relates to the ability to increase image resolution by reducing defect visibility (such as white line visibility and other defect visibility), increasing light transmission, and by suppressing reduction in contrast. An optical plate for improving image quality and production yield, comprising a filter for the optical plate, and an image display device including the optical plate or the filter. CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of the entire disclosure of the entire disclosure of the entire disclosure of the entire disclosure of the entire disclosure of Incorporated herein. [Prior Art] Various types of image display devices have recently been developed. Examples of such image display devices include a liquid crystal display (LCD), a plasma display pane (PDP), a field emission display (FED), and a cathode ray tube (CRT). ), vacuum fluorescent display and field emission display panel. These image display devices display color images by realizing the emission of three primary lights such as red, blue, and green. Such image display devices generally include: a panel assembly that forms an image; and a filter that shields electromagnetic waves, near infrared rays, and/or orange light emitted from the panel assembly, and has, for example, surface reflection prevention 201007226 ^lyyjpul and / or color adjustment m should be full luminosity requirements, because the filter is placed on the front side of the panel assembly. However, the filter absorbs and/or reflects light emitted from the panel assembly, thereby reducing the brightness of the image display device. In addition, in a bright environment (e.g., in a bright room), external ambient light passes through the filter of the image display device and may enter the panel assembly. In this regard, external ambient light that passes through the filter from the outside may interfere with light emitted from the panel assembly, thereby reducing the contrast ratio in a bright room and reducing the image display capability of the image display device. In order to solve such problems, an optical plate can be used. In general, the conventional optical plate includes a wedge-shaped external light absorbing portion containing a light absorbing material and disposed in a transparent light transmitting portion at a predetermined interval. Since the external light absorbing portion absorbs external ambient light, the contrast ratio of the image is improved. Generally, a plurality of grooves in the light transmitting portion are filled with a material that absorbs light to form an external light absorbing portion. However, each of the grooves is not completely filled with a material that absorbs light, and a portion of each of the grooves forms a recessed portion of the optical plate. Additionally, the amount of light absorbing material that fills each of the grooves can vary. Therefore, in the plurality of external light absorbing portions, the depressed portions of the two adjacent external light absorbing portions (i.e., the portions of the grooves of the light transmitting portion which are not filled with the external light absorbing portion) may have very different depths. Therefore, when an image display device including the optical plate is used, a white line may be seen on the screen, and the viewer may think that the quality of the image is poor. 201007226 3iyv3pm SUMMARY OF THE INVENTION The present invention provides an optical panel capable of reducing defect visibility (e.g., white line visibility and other defect visibility) and improving image quality and production yield. The present invention also provides an optical plate capable of improving the contrast ratio in a bright environment. The present invention also provides a filter comprising the optical plate. The present invention also provides an image display device comprising the optical plate or the optical filter, wherein the optical plate can reduce defect visibility (e.g., white line visibility and other defect visibility)' and improve image quality and production yield. According to an aspect of the present invention, there is provided an optical sheet comprising: a light transmitting portion that includes a plurality of grooves spaced apart from each other at one end of a light transmitting portion corresponding to an image light source side or an observer side; and a plurality of An external light absorbing portion that fills the groove and includes a material that absorbs light, wherein at least a portion of each of the grooves that is not filled with the external light absorbing portion forms a recessed portion having one open side, And the difference Ad between the maximum depths of the two recessed portions adjacent to each other in the recessed portion satisfies the following condition: 0.01 μηη S |Δ(1| $1 μηη. The turbidity of the optical plate when measured using ASTM D1003 The value of the haze value (%H) can be in the range of 5% to 25%. The width of the external light absorbing portion can be in the range of 1〇0〇1 to 4〇0111' and the maximum depth of the depressed portion is 〇丨The range of the external light absorption part can be in the range of 5〇#111 to 2〇〇μπι 201007226
Jiy^pul 内且凹陷部分之最大深度在0.1 μιη至20 μιη之範圍内。 夕卜部光吸收部分之厚度方向橫截面可 四邊 形或梯形。 外部光吸收部分可以條紋形式'矩陣形式 來安置。 光學板可為用於增強對比率之板。 根據本發明之另—態樣’提供-種用於影像顯示裝置 ❹ 之濾光器，該濾光器包含··上文所述之光學板；以及濾光 器基座。 濾光器基座可包含反射防止膜、硬塗層、電磁波屏蔽 膜及其組合。 濾光器基座可進一步在光學板之對應於影像光源侧 的一侧包含色彩調節膜。 根據本發明之另一態樣，提供一種包含用於上文所述 之影像顯示裝置之光學板或濾光器的影像顯示裝置。 【實施方式】 在下文中’將參考隨附圖式來詳細描述根據本發明的 概念之一實施例的光學板、包含該光學板之濾光器以及包 含該光學板或該濾光器之影像顯示裝置。 藉由參考隨附圖式來詳細描述本發明之例示性實施 例，本發明之特徵及優點將變得更明顯。 圖1為根據本發明一實施例之配備有包含光學板之濾 光器40的影像顯示裝置1的分解透視圖，圖2Α為根據本 發明一實施例之包含光學板200之濾光器40的分解橫截面 201007226 31993pifl 圖，且圖2B為根據本發明之另一實施例之包含光學板200 之濾光器40的分解橫截面圖。 參看圖1，根據本發明之本實施例的影像顯示裝置1 包含盒(case)l〇、覆蓋該盒10之頂部部分的蓋5〇、容納於 盒10中的驅動電路基板20、形成影像之面板總成，以 及渡光器40。 多個可視影像回應於自驅動電路基板20施加之電信 號而形成於面板總成30中’且經由濾光器40而向外界顯 示。 參看圖2A及圖2B，濾光器40包含色彩調節膜1〇〇、 光學板200’以及包含電磁波屏蔽膜300、硬塗層400及反 射防止膜500的濾光器基座（filter base，FB ) 〇 色彩調節膜100可包含（例如）阻斷氖光之著色劑， 且可進一步包含近紅外線吸收化合物或著色劑。 光學板200包含基底膜230、光透射部分21〇以及多 個外部光吸收部分220。光學板200可安置於色彩調節膜 100下。上文所述之光學板200可為（例如）用於增強對 比率之板，但不限於此。可在較寬泛的意義上解釋用於増 強對比率之板’例如解釋為甩於主要增加影像顯示裝置1 之對比率的板。 光透射部分210透射從圖1中所圖示之面板總成3〇 發射的光。光透射部分210可包含可固化樹脂。詳言之， 光透射部分210可包含丙烯樹脂，其在曝露於電離輻射或 熱能時可固化。 201007226 ^ ivyjpiri 另外’光透射部分210可以是透明的，但未必完全透 明。在後一種情況下，光透射部分210可具有此項技術中 通常可接受為透明的透明度。一般而言，光透射部分210 之形狀可與外部光吸收部分220 (稍後將對其進行描述） 之形狀互補’但光透射部分210之形狀不限於此。亦即， 光透射部分210可具有以預定間隔安置的多個凹槽g2i〇， 且凹槽g^o中填充有可吸收光的材料，從而形成稍後將描 述的外部光吸收部分220。凹槽g21〇及外部光吸收部分22〇 可形成於光透射部分210之對應於影像光源侧（參考圖 2A、圖2B及圖3)的一端，或形成於光透射部分21〇之 對應於觀察者侧（未圖示）的一端。光透射部分21〇之折 射率可在1.3至1.8之範圍内。難以將光透射部分21〇製 k為具有小於1.3之折射率。另一方面，當光透射部分21〇 之折射率大於1.8時，光透射部分21〇之透射率顯著減小， ^對比率亦減小’從而導致影像顯示裝置1之總體解析度 減小。根據本實施例，光透射部分21〇 :=填充有可吸收光的材料，使得凹 八…：的(emPty)。凹槽g21(>之空的部分被稱為凹陷部 二然而’凹槽g21G之結構不限於此。可使用各種方 成凹陷部分細a。舉例而言’可藉由在凹槽如填 ί：η收光之材料時用彈性刮片來壓實可吸收光之材 料〜部分2·。或者，可藉由用可吸收光之材 且接著藉由（例如）刮擦來壓實所填 了吸收光之材料，以形成凹陷部分20〇a。或者，可藉 201007226 31993pifl ::可= 曰來填充凹槽g2i。且接著使該 ，燥，以形成凹陷部分2咖。具體而言如圖2A及圖化^ 所圖陷部分220a為凹槽g21〇之由外部光吸收部分 220及光透射部分21G界定之至少 口侧。由於凹陷部* 200a之形 ：：個開 透射，同時抑制外部光吸收率之減小:稍後將“: 細描述。 根據本發明之一實施例，多個凹陷部分 200a中之兩 個鄰近凹關分之最大深度之_差㈤）滿足以下條件： 0.01 μιη<|Δ(1| < 1 μιη 其中Ad為da+1-da、屯-屯！或dwdw。 若丨Ad|小於0.01 ，則兩個鄰近凹陷部分2⑻&之最 大深度之間的差減小，且光學板綱具有均勻的外觀。然 而，光較少擴散，且因此缺陷可視度增加。因此，觀看者 可谷易辨認出由於雜質之混合而導致的光學板2〇〇本身的 缺陷或製程缺陷。另一方面，若丨Ad|大於i μπι，則對應之 凹陷部分200a可被識別為白線。舉例而言，若da_dai及 da_rda-2中之每一者等於或小於1 μΠϋ屯+广屯大於1 μιη， 則具有最大深度da+1之凹陷部分2〇〇a被識別為白線在本 文中’「白線」表示將在光學板2〇〇之特定部分（例如，呈 條紋圖案之凹陷部分）中觀看到之白線或光點。藉由如上 文所述來控制|Ad|，缺陷可視度及白線可視度可減低，且 因此生產良率可增加，而缺陷率減小，且影像品質可增加。 藉由用熱塑性樹脂、熱固性樹脂或紫外線可固化樹脂 201007226 J wapiti 以及可吸收光之材料來填充形成於光透射部分21〇中之凹 槽g2io以形成外部光吸收部分220。可吸收光之材料可吸 收外部環境光，並增強明亮環境中之對比率，從而有可^ 形成高解析度影像。參看圖2A，外部光吸收部分220中^ 每一者具有四邊形橫截面，且參看圖2B，外部光吸收部分 220中之每一者具有梯形橫截面。 刀 當外部光吸收部分220包含熱固性樹脂時，該熱固性 φ 樹脂可與光透射部分210中所包含之熱固性樹脂相‘同'或類 似。 可吸收光之材料之實例可包含黑色無機材料、黑色有 機材料、黑色氧化金屬及其混合物。當外部光吸收部分22〇 包含黑色氧化金屬時，由於黑色氧化金屬具有較低電阻， 因此可藉由調節黑色氧化金屬粉末之量或黑色氧化金屬膜 之厚度來控制電阻。因此，外部光吸收部分220可屏蔽電 磁波。外部光吸收部分220可包含含有碳之紫外線可固化 樹脂。外部光吸收部分220之折射率可類似於光透射部分 ® 210之折射率’具體而言在1.3至1.8之範圍内。 基底膜230安置於光透射部分21〇之一個表面上，亦 即與形成凹陷部分200a之表面相對的表面上。基底膜230 支撐著形成有外部光吸收部分220的光透射部分21〇。 基底膜230可包含選自由謎礙（p〇iyethersulphone， PES )、聚丙稀酸酯（polyacrylate，PAR )、聚謎醯亞胺 (polyetherimide ’ PEI)、聚萘二甲酸乙二酯（p〇lyethylene naphthalate ’ PEN )、聚乙二醇對苯二曱酸酯 11 201007226 31993pifl (polyethyleneterephthalate，PET)、聚苯硫醚（polyphenylene sulfide，PPS )、聚烯丙酸酯、聚醯亞胺、聚碳酸酯 (polycarbonate，PC )、三醋酸纖維素（cellui〇se triacetate， TAC)及醋酸丙酸纖維素（cellulose acetate propionate， CAP)組成之群組(group)中的至少一種材料。較佳地，基 底膜230可包含聚碳酸酯（PC)、聚乙二醇對苯二甲酸酯 (PET)、三醋酸纖維素（TAC)或聚萘二甲酸乙二酯 (PEN)。另外，基底膜230可包含折射率等於或類似於光 透射部分210之折射率的材料。 ® 另外，光學板200可更包含保護膜240 (見圖3至圖 4)，所述保護膜240形成於光透射部分21〇之一個表面上， 亦即與形成有基底膜230之表面相對的表面。保護膜240 保護光學板200，直至光學板200安裝於濾光器4〇上為 止。在光學板200安裝於濾光器40上之後，保護膜24〇 與光學板200分離；然而，本發明不限於此。 同時’在光學板200併入濾光器40中之後，凹陷部 分200a可完全填充有黏接層及/或色彩調節膜1〇〇的一部 ❹ 分，但本發明不限於此。當凹陷部分2〇〇3填充有黏接層之 一部分時，用於形成黏接層之材料的折射率可等於或類似 於光透射部分210之折射率。 當使用ASTMD1003量測時，具有上文所述之結構的 光學板200可具有5%至25%之濁度值（％H)。 參看圖2A及圖2B，濾光器基座（FB)安置於光學板 200之表面上，且包含以此次序安置之電磁波屏蔽膜3〇〇、 12 201007226 ^lywpul 硬塗層400及反射防止膜5〇(^然而，FB之結構不限於此。 亦即’屏蔽膜300、硬塗層400及反射防止膜5〇〇可以任 何次序安置於FB中。FB亦可包含一包含執行不同功能之 至少兩種類型之材料的層。 電磁波屏蔽膜300可屏蔽電磁波。電磁波屏蔽膜3〇〇 可包含導電網(conductivemesh)層、金屬薄層、高折射率透 明薄層或先前各層中的至少兩者。在圖2A及圖2B中，電 鬱磁波屏蔽膜300為單一層。然而，電磁波屏蔽膜3〇〇之結 構不限於此。舉例而言，電磁波屏蔽膜3〇〇可具有包含至 少兩個層之多層結構。 硬塗層具有抗劃痕性(scratch resistance)，可防止 電磁波屏蔽膜300或反射防止膜50〇由於（例如）與外部 材料接觸而損壞。硬塗層400可包含加強型玻璃，或包含 聚合物作為黏合劑的加強型玻璃。另外，硬塗層4〇〇可包 含基於丙烯之聚合物、基於胺基甲酸酯的聚合物、基於環 氧樹脂的聚合物、基於矽氧烷之聚合物或如寡聚物之類的 ® 紫外線可固化樹脂。此外，硬塗層400可更包含基於發石 (silica)之填充物以增加其硬度。 —反射防止膜5〇〇調節可見光之透射度，以便使長時間 觀看影像顯不裝置1之使用者的眼疲勞減至最小。藉由使 用反射防止膜500以調節可見光之透射率，可選擇性地吸 收可見光，而且可加寬例如對比率之類的色彩再現範圍。 在圖2A及圖2B中，反射防止膜500為單一層。然而，反 射防止膜500之結構不限於此^舉例而言，反射防止膜5如 13 201007226 31993pifl 可具有包含至少兩個層之多層結構。 反射防止膜500具有反射防止效應，因為自外界進入 之可見光自反射防止膜500之表面反射，且自反射防止膜 500與硬塗層4〇〇之間的界面反射之可見光彼此異相，因 此發生破壞性干涉。 可藉由固化及固定氧化銦錫（indium tin oxide，ITO ) 與氧化發（Si〇3)之混合物、絡酸錄（nickel chromate，The maximum depth of the concave portion in the Jiy^pul is in the range of 0.1 μm to 20 μm. The thickness direction cross section of the light absorbing portion of the outer portion may be quadrangular or trapezoidal. The external light absorbing portion can be placed in a stripe form 'matrix form. The optical plate can be a plate for enhancing the contrast ratio. According to another aspect of the invention, there is provided a filter for an image display device, the optical filter comprising: the optical plate described above; and a filter base. The filter base may include an anti-reflection film, a hard coat layer, an electromagnetic wave shielding film, and combinations thereof. The filter base may further include a color adjustment film on a side of the optical plate corresponding to the image light source side. According to another aspect of the present invention, an image display apparatus comprising an optical plate or filter for the image display device described above is provided. [Embodiment] Hereinafter, an optical plate, an optical filter including the optical plate, and an image display including the optical plate or the optical filter according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Device. Features and advantages of the present invention will become more apparent from the detailed description of the exemplary embodiments. 1 is an exploded perspective view of an image display device 1 equipped with an optical filter 40 including an optical plate, and FIG. 2A is a filter 40 including an optical plate 200 according to an embodiment of the present invention. An exploded cross-section 201007226 31993 pifl diagram is shown, and FIG. 2B is an exploded cross-sectional view of the optical filter 40 including the optical plate 200 in accordance with another embodiment of the present invention. Referring to Fig. 1, an image display apparatus 1 according to the present embodiment of the present invention includes a case, a cover 5 covering a top portion of the case 10, a drive circuit substrate 20 housed in the case 10, and an image forming apparatus. Panel assembly, and damper 40. A plurality of visible images are formed in the panel assembly 30 in response to an electric signal applied from the drive circuit substrate 20 and are displayed to the outside via the filter 40. Referring to FIGS. 2A and 2B, the filter 40 includes a color adjustment film 1A, an optical plate 200', and a filter base (FB) including the electromagnetic wave shielding film 300, the hard coat layer 400, and the anti-reflection film 500. The 〇 color adjustment film 100 may include, for example, a coloring agent that blocks stroking, and may further include a near infrared absorbing compound or a coloring agent. The optical plate 200 includes a base film 230, a light transmitting portion 21A, and a plurality of external light absorbing portions 220. The optical plate 200 can be disposed under the color adjustment film 100. The optical plate 200 described above may be, for example, a plate for enhancing the contrast ratio, but is not limited thereto. The board for the contrast ratio can be explained in a broader sense, for example, as a board which mainly increases the contrast ratio of the image display apparatus 1. The light transmitting portion 210 transmits light emitted from the panel assembly 3〇 illustrated in Fig. 1. The light transmitting portion 210 may include a curable resin. In particular, the light transmitting portion 210 may comprise an acrylic resin that is curable upon exposure to ionizing radiation or thermal energy. 201007226 ^ ivyjpiri Additionally, the light transmissive portion 210 can be transparent, but not necessarily completely transparent. In the latter case, the light transmissive portion 210 can have a transparency that is generally acceptable to be transparent in the art. In general, the shape of the light transmitting portion 210 may be complementary to the shape of the external light absorbing portion 220 (which will be described later)', but the shape of the light transmitting portion 210 is not limited thereto. That is, the light transmitting portion 210 may have a plurality of grooves g2i〇 disposed at predetermined intervals, and the grooves g^o are filled with a material capable of absorbing light, thereby forming the external light absorbing portion 220 which will be described later. The groove g21〇 and the external light absorbing portion 22〇 may be formed at one end of the light transmitting portion 210 corresponding to the image light source side (refer to FIGS. 2A, 2B, and 3), or formed in the light transmitting portion 21〇 corresponding to the observation. One end of the person side (not shown). The refractive index of the light transmitting portion 21 can be in the range of 1.3 to 1.8. It is difficult to k with the light transmitting portion 21 to have a refractive index of less than 1.3. On the other hand, when the refractive index of the light transmitting portion 21 大于 is larger than 1.8, the transmittance of the light transmitting portion 21 显 is remarkably decreased, and the contrast ratio is also decreased, thereby causing the overall resolution of the image display device 1 to decrease. According to the present embodiment, the light transmitting portion 21 〇 : = is filled with a material capable of absorbing light such that (emPty) is concave. The groove of the groove g21 (> is referred to as a depressed portion. However, the structure of the groove g21G is not limited thereto. Various kinds of square portions may be used to form a thin portion a. For example, 'in the groove, for example, : When the η light-receiving material is used, the elastic squeegee is used to compact the light-absorbing material ～ part 2·. Alternatively, it may be filled by using a material that absorbs light and then by, for example, scraping. The light absorbing material is formed to form the recessed portion 20〇a. Alternatively, the recess g2i may be filled by 201007226 31993 pifl::==, and then dried, to form the recessed portion 2, specifically as shown in FIG. 2A The image trapping portion 220a is at least the mouth side defined by the outer light absorbing portion 220 and the light transmitting portion 21G of the groove g21 。. The shape of the recessed portion * 200a is: one open transmission, and the external light absorption is suppressed. Reduction in rate: "Detailed description will be made later. According to an embodiment of the present invention, the difference (f) of the maximum depth of two adjacent concave portions of the plurality of recessed portions 200a satisfies the following condition: 0.01 μιη<| Δ(1| < 1 μιη where Ad is da+1-da, 屯-屯! or dwdw. Ad| is less than 0.01, the difference between the maximum depths of the two adjacent recessed portions 2(8)& is reduced, and the optical plate has a uniform appearance. However, the light is less diffused, and thus the visibility of the defect is increased. Therefore, the viewer It is easy to recognize defects or process defects of the optical plate 2 itself due to mixing of impurities. On the other hand, if 丨Ad| is larger than i μπι, the corresponding recessed portion 200a can be recognized as a white line. In other words, if each of da_dai and da_rda-2 is equal to or less than 1 μΠϋ屯+广屯 is greater than 1 μιη, the recessed portion 2〇〇a having the maximum depth da+1 is recognized as a white line in the text “white line” ” indicates a white line or spot that will be viewed in a specific portion of the optical plate 2 (for example, a recessed portion in a stripe pattern). By controlling |Ad|, defect visibility and white line visibility as described above Can be reduced, and thus the yield can be increased, the defect rate is reduced, and the image quality can be increased. By using a thermoplastic resin, a thermosetting resin or an ultraviolet curable resin 201007226 J wapiti and absorbable light The groove g2io formed in the light transmitting portion 21A is filled to form the external light absorbing portion 220. The light absorbing material absorbs external ambient light and enhances the contrast ratio in a bright environment, thereby forming a high resolution. Referring to Fig. 2A, each of the external light absorbing portions 220 has a quadrangular cross section, and referring to Fig. 2B, each of the external light absorbing portions 220 has a trapezoidal cross section. The knife when the external light absorbing portion 220 contains In the case of a thermosetting resin, the thermosetting φ resin may be 'same' or similar to the thermosetting resin contained in the light transmitting portion 210. Examples of the light absorbing material may include a black inorganic material, a black organic material, a black oxidized metal, and a mixture thereof. When the external light absorbing portion 22 包含 contains black oxidized metal, since the black oxidized metal has a lower electric resistance, the electric resistance can be controlled by adjusting the amount of the black oxidized metal powder or the thickness of the black oxidized metal film. Therefore, the external light absorbing portion 220 can shield the electromagnetic waves. The external light absorbing portion 220 may contain an ultraviolet curable resin containing carbon. The refractive index of the external light absorbing portion 220 may be similar to the refractive index of the light transmitting portion ® 210, specifically in the range of 1.3 to 1.8. The base film 230 is disposed on one surface of the light transmitting portion 21, i.e., on the surface opposite to the surface on which the recessed portion 200a is formed. The base film 230 supports the light transmitting portion 21A formed with the external light absorbing portion 220. The base film 230 may comprise a pigment selected from the group consisting of PES, PES, polyetherimide 'PEI, and polyethylene naphthalate. ' PEN ), polyethylene glycol terephthalate 11 201007226 31993pifl (polyethylene terephthalate, PET), polyphenylene sulfide (PPS), polyallyl ester, polyimide, polycarbonate At least one material selected from the group consisting of: PC), cellulose acetate triacetate (TAC), and cellulose acetate propionate (CAP). Preferably, the base film 230 may comprise polycarbonate (PC), polyethylene terephthalate (PET), cellulose triacetate (TAC) or polyethylene naphthalate (PEN). In addition, the base film 230 may include a material having a refractive index equal to or similar to that of the light transmitting portion 210. In addition, the optical plate 200 may further include a protective film 240 (see FIGS. 3 to 4) formed on one surface of the light transmitting portion 21, that is, opposite to the surface on which the base film 230 is formed. surface. The protective film 240 protects the optical plate 200 until the optical plate 200 is mounted on the filter 4A. After the optical plate 200 is mounted on the optical filter 40, the protective film 24 is separated from the optical plate 200; however, the present invention is not limited thereto. Meanwhile, after the optical plate 200 is incorporated in the optical filter 40, the depressed portion 200a may be completely filled with a portion of the adhesive layer and/or the color adjustment film 1〇〇, but the present invention is not limited thereto. When the recessed portion 2〇〇3 is filled with a portion of the adhesive layer, the refractive index of the material for forming the adhesive layer may be equal to or similar to the refractive index of the light transmitting portion 210. The optical sheet 200 having the structure described above may have a haze value (%H) of 5% to 25% when measured using ASTM D1003. Referring to FIGS. 2A and 2B, the filter base (FB) is disposed on the surface of the optical plate 200, and includes the electromagnetic wave shielding film 3〇〇, 12 201007226 ^lywpul hard coat 400 and the anti-reflection film disposed in this order. 5〇 (^ However, the structure of the FB is not limited thereto. That is, the 'shielding film 300, the hard coat layer 400, and the anti-reflection film 5' may be disposed in the FB in any order. The FB may also include at least one that performs different functions. A layer of two types of materials. The electromagnetic wave shielding film 300 may shield electromagnetic waves. The electromagnetic wave shielding film 3 may include at least two of a conductive mesh layer, a metal thin layer, a high refractive index transparent thin layer, or a previous layer. 2A and 2B, the electro-magnetic magnetic shielding film 300 is a single layer. However, the structure of the electromagnetic shielding film 3 is not limited thereto. For example, the electromagnetic shielding film 3 may have at least two layers. Multilayer structure. The hard coat layer has scratch resistance, which prevents the electromagnetic wave shielding film 300 or the anti-reflection film 50 from being damaged due to contact with, for example, an external material. The hard coat layer 400 may include a reinforced glass. Or a reinforced glass comprising a polymer as a binder. In addition, the hard coat layer 4 may comprise a propylene-based polymer, a urethane-based polymer, an epoxy-based polymer, a decane-based polymer. a polymer or a UV curable resin such as an oligomer. Further, the hard coat layer 400 may further contain a silica-based filler to increase its hardness. - The anti-reflection film 5 adjusts visible light Transmittance, in order to minimize eye fatigue of a user who views the image display device for a long time. By using the anti-reflection film 500 to adjust the transmittance of visible light, visible light can be selectively absorbed, and can be broadened, for example, The color reproduction range such as the ratio. In Fig. 2A and Fig. 2B, the anti-reflection film 500 is a single layer. However, the structure of the anti-reflection film 500 is not limited thereto, and the anti-reflection film 5 may have, for example, 13 201007226 31993pifl The multi-layer structure including at least two layers. The anti-reflection film 500 has an anti-reflection effect because visible light entering from the outside is reflected from the surface of the anti-reflection film 500, and self-reflection prevention The visible light reflected by the interface between the film 500 and the hard coat layer 4 is out of phase with each other, and thus destructive interference occurs. The indium tin oxide (ITO) and the oxidized hair (Si〇3) can be cured and fixed. Mixture, nickel chromate,
NiCr)與氧化矽（Si〇2)之混合物或類似物來形成反射防 止膜500。另外，反射防止膜5〇〇可包含氧化鈦或具有較 ❾ 低折射率之特定的含氟樹脂。 在下文中’將參考隨附圖式更全面地描述光透射部分 210、外部光吸收部分22〇及凹陷部分2〇〇a之特定組態及 操作效應。 圖3為圖2A之光學板200的在光學板200安裝於濾 光器40上之前的局部放大圖，圖4為圖3之部分A的放 大圖°應注意，保護膜240尚未被移除。 在圖1至圖4中，相同參考標號表示相同元件。 ❹ 可藉由執行滾軋模製製程（roll molding process )、使 用熱塑性樹脂之熱壓製程（thermal pressing process)或射 出成形製程（injection molding process)來形成外部光吸收 部分220 ’其中形狀與外部光吸收部分22〇之圖案相反的 $透射部分210之凹槽g2i〇中填充有熱塑性或熱固性樹 脂。另外’當包含於光透射部分210中之紫外線可固化樹 脂具有反射防止功能、電磁波屏蔽功能、色彩調節功能或 14 201007226 3iyy3piti 組合功能時，光學板200可另外執行此等功能。 參看圖3及圖4,根據本發明之本實施例之光學板2〇〇 包含光透射部分210、外部光吸收部分22〇、基底膜23〇 及保護膜240。保護膜240可省略。2α +圖示之遽光器 40包含保護膜240已移除的光學板2〇〇。 光透射部分210、外部光吸收部分22〇、基底膜23〇 及保護膜240之組態與上文所述相同。 ❹ 外部光吸收部分220可以各種形式安置，如條紋形 式矩陣形式、波浪形式等。另外，外部光吸收部分220 I以預定間隔來安置，以允許光穿過鄰近的外部光吸收部 刀220之間的區域。在圖3中，外部光吸收部分220具有 四邊形橫截面。然而，外部光吸收部分22〇之橫截面形狀 不限於此〇舉例而言，外部光吸收部分22〇可具有三角形、 梯形或五邊形橫截面。 如參考圖2Α及圖2Β所述，外部光吸收部分22〇及凹 φ 陷部分2〇〇a依序形成於光透射部分210之凹槽g21〇中。亦 凹槽g^o中部分填充有可吸收光之材料從而形成外部 光吸收部分220,且凹槽g21()i空部分形成凹陷部分2〇〇a。 凹陷部分22〇a之寬度方向橫截面為u形，但凹陷部分2〇〇a 之形狀不限於此。當光學板200與色彩調節膜1〇〇組合而 形成濾光器40時，凹陷部分200a中可填充有具有折射率 等於或類似於光透射部分210之折射率的黏接層（未圖示） 的一部分。 在根據本發明之·實施例之光學板200中，與凹陷部 15 201007226 31993pifl 分220之其他部分之深度相比，凹陷部分200a之最大深度 da+i、da、da·!及da_2對白線之形成具有較大影響。具體而 言’若Ad (亦即，兩個鄰近的凹陷部分之最大深度之間的 差）在0.01 μπι至1 μιη之範圍内，則缺陷可視度及白線可 視度兩者均可減低》 另外，與凹陷部分220之其他部分的深度相比，凹陷 部分220a與光透射部分210之間的界面之最大深度dimax 亦對光透射具有較大影響。現將參考圖4 (其繪示自影像 光源侧入射於光學板200上的光“及L2)例示性地對此 進行描述。在本文中，光Ll代表未形成凹陷部分2〇〇a(亦 即’習知技術）時自影像光源發射之光之中可穿過安置於 圖4中之外部光吸收部分220左側之光透射部分210的最 右側的光，且光L2代表形成凹陷部分2〇〇a (亦即，本發 明）時自影像光源發射之光之中可穿過安置於外部光吸收 部分220左侧之光透射部分210的最右侧的光。當形成凹 陷部分200a時，更多的光可穿過光Ll與光L2之光學路徑 之間的光透射部分210，且因此光學板2〇〇之光透射可增 加’且具有光學板200之影像顯示裝置的亮度可增加。 關於光學板200，如上文所述，凹槽g2i〇形成於光透 射部分210中，且凹槽g2〗〇中之每一者之僅一部分填充有 可吸收光的材料從而形成外部光吸收部分220，且因此與 習知技術相比，使用可吸收光之材料之填充製程可容易執 行，且製造成本可減低。此外，在凹槽g2i〇周圍可以不形 成一種黏至光透射部分210之可吸收光之材料的殘餘物 16 201007226 (此是習知技術中的一問題）。 另外，當外部光吸收部分22〇之寬度|22〇在1〇 μπι 至40 μιη之範圍内時，凹陷部分2〇〇a之最大深度da+i、da、 t及&可在〇. 1 至2〇降之範圍内。 、在本文中，外部光吸收部分220之寬度w220代表外部 光吸收部分220之對應於影像光源側之一端的寬度。若外 部光吸收部分220具有如圖2B中所說明的梯形橫截面， • 則外部光吸收部分220之寬度W22G代表外部光吸收部分 220之對應於影像光源側之一端的寬度，亦即最大寬度。 另外’當外部光吸收部分220之高度h22〇在50 μπι至 200μιη之範圍内時，凹陷部分2〇〇a之最大深度4+1、屯、 t及da_2可在0.1 μιη至2〇 μιη之範圍内。 根據本發明之本實施例的光學板200可更包含安置於 基底膜230之一個表面（亦即，與安置光透射部分21〇之 表面相對的表面）上的稜鏡部分（未圖示用於形成稜鏡 鲁 部分之材料可與用於形成光透射部分210之材料相同或類 似。藉由包含稜鏡部分，光學板2〇〇可具有較高的外部光 吸收率’且於是具有增強之對比率及較高之解析度，而透 射率不會較大地改變。 具有如上文所述之結構的光學板或渡光器可包含於 影像顯示裝置中’因此影像顯示裝置之缺陷可視度（例如 白線可視度及其他缺陷可視度）得以減低，影像之品質得 以改良、對比率得以增加且可獲得高解析度的影像。 在下文中，現將參考以下實例更詳細地描述本發明。 17 201007226 31993pifl 然而，此等實例是出於說明目的而非限制目的而給出。 實例1 製造模製輥，其一表面上形成有多個突起，突起中之 每一者具有四邊形侧面橫截面。接著，藉由使用配備有紫 外（UV)線產生裝置之圖案輥設備，將1〇〇g含有折射率 較低之基於丙烯的可固化樹脂的混合溶液（Sartomer， CN-981)(折射率：148)緩慢地添加於模製輥與厚度為 188 μιη的光學PET膜（由Toyobo公司製造）之間並使其 固化，從而形成具有圖案與模製輥之突起之圖案相反之凹 ❹ 槽的光透射部分。光透射部分之折射率為1.51。在本文中， 光學PET膜構成基底膜。藉由將2 g碳黑與丨⑻g基於丙 稀之可固化樹脂混合溶液（Sart〇mer，CN-985)混合而製 備的破分散體（折射率：1.49)散布於凹槽上，且接著使 用由軟塑料形成之刮墨刀來對其執行刮擦以均勻地填充凹 槽，從而形成折射率為1.52之多個外部光吸收部分，且接 著形成平均最大深度為3 μιη之多個凹陷部分。在以3 rpm 至20 rpm之逮率擺動刮墨刀，並將鄰近的兩個凹陷部分之 0 最大深度之間的差|Δ(1|調節至0.01 μιη至1 μιη之範圍内的 同時執行刮擦。接著’使用UV線使碳分散體之基於丙烯 的可固化樹脂固化，從而獲得包含如圖3中所圖示之凹陷 部分的光學板。在本文中，光透射部分之間距為74 μιη， 外部光吸收部分之高度及寬度分別為102 μιη及24 μιη，且 光透射部分之厚度為150 μιη。光透射部分之間距代表光透 射部分之由外部光吸收部分劃分之鄰近部分之對應位置之 18 201007226 j lyyjpul 間的距離。 比較性實例丄 以與實例1中相同之方式製造光學板，只是將使用刮 ，刀之刮擦製程執行三次，同時將兩個鄰近的凹陷部分之 最大深度之間的差|Δ(1|調節至小於〇.〇1 μιη。 比較性實你丨9 以與實例1中相同之方式製造光學板，只是以小於3 φ 11)111之擺動速率執行使用刮墨刀之刮擦製程，以便將兩個 鄰近凹陷部分之最大深度之間的差|Δ(1|調節至 1 μιη 至 3 μιη之範圍内。 評估實你| 對所製造之光學板進行評估。表1中顯示結果。表i 包含關於是否觀看到白線及其他缺陷的資訊，以及使用 ASTMD1003量測之濁度值（％H)。在本文中，用肉眼來 識別白線及其他缺陷。「〇」指示用肉眼識別到白線及其他 缺陷’而「X」指示用肉眼未識別到白線及其他缺陷。 ® [表 1] 實例1 比較性實例1 比較性實例2 白線 X X 〇 其他缺陷 X 0 X 濁度值（％H) 13 3 32 參看表1，根據實例1而製造之光學板未顯示出白線 或其他缺陷。然而，在根據比較性實例i而製造之光學板 之情況下’凹陷部分具有均勻深度，且因此未看到白線， 201007226 31993pifl 仁看到其他缺陷。在根據比較性實例2而製造之光學板的A mixture of NiCr) and yttrium oxide (Si〇2) or the like is used to form the reflection preventing film 500. Further, the anti-reflection film 5 may contain titanium oxide or a specific fluorine-containing resin having a relatively low refractive index. The specific configuration and operational effects of the light transmitting portion 210, the external light absorbing portion 22, and the recess portion 2A will be more fully described hereinafter with reference to the accompanying drawings. 3 is a partially enlarged view of the optical plate 200 of FIG. 2A before the optical plate 200 is mounted on the filter 40, and FIG. 4 is an enlarged view of the portion A of FIG. 3. It should be noted that the protective film 240 has not been removed. In FIGS. 1 through 4, the same reference numerals denote the same elements.外部 The external light absorbing portion 220' may be formed by performing a roll molding process, a thermal pressing process using a thermoplastic resin, or an injection molding process. The groove g2i of the transmissive portion 210 of the opposite portion of the absorbing portion 22 is filled with a thermoplastic or thermosetting resin. Further, when the ultraviolet curable resin contained in the light transmitting portion 210 has a reflection preventing function, an electromagnetic wave shielding function, a color adjustment function, or the 2010 201026 3iyy3piti combination function, the optical plate 200 can additionally perform such functions. Referring to Figures 3 and 4, an optical plate 2A according to this embodiment of the present invention includes a light transmitting portion 210, an external light absorbing portion 22A, a base film 23A, and a protective film 240. The protective film 240 can be omitted. The 2α + illustrated calender 40 includes an optical plate 2 that has been removed from the protective film 240. The configurations of the light transmitting portion 210, the external light absorbing portion 22, the base film 23A, and the protective film 240 are the same as described above. ❹ The external light absorbing portion 220 may be disposed in various forms such as a stripe matrix form, a wave form, or the like. In addition, the external light absorbing portions 220 I are disposed at predetermined intervals to allow light to pass through a region between the adjacent external light absorbing cutters 220. In Fig. 3, the external light absorbing portion 220 has a quadrangular cross section. However, the cross-sectional shape of the external light absorbing portion 22 is not limited thereto. For example, the external light absorbing portion 22 may have a triangular, trapezoidal or pentagonal cross section. As described with reference to Fig. 2A and Fig. 2A, the external light absorbing portion 22 and the concave portion 2a are sequentially formed in the groove g21 of the light transmitting portion 210. Also, a portion of the groove g^o is filled with a material capable of absorbing light to form the external light absorbing portion 220, and an empty portion of the groove g21()i forms a depressed portion 2〇〇a. The recessed portion 22〇a has a U-shaped cross section in the width direction, but the shape of the recessed portion 2〇〇a is not limited thereto. When the optical plate 200 is combined with the color adjustment film 1A to form the filter 40, the recessed portion 200a may be filled with an adhesive layer (not shown) having a refractive index equal to or similar to that of the light transmitting portion 210. a part of. In the optical plate 200 according to the embodiment of the present invention, the maximum depths da+i, da, da·!, and da_2 of the concave portion 200a are compared with the depths of other portions of the depressed portion 15 201007226 31993pifl 220 Formation has a greater impact. Specifically, if Ad (that is, the difference between the maximum depths of two adjacent concave portions) is in the range of 0.01 μπι to 1 μηη, both the defect visibility and the white line visibility can be reduced. The maximum depth dimax of the interface between the recessed portion 220a and the light transmitting portion 210 also has a greater influence on light transmission than the depth of the other portions of the recessed portion 220. Reference will now be made to FIG. 4 (which depicts light "and L2 incident on the optical plate 200 from the image source side" as exemplarily described. In this context, the light L1 represents that the recessed portion 2a is not formed (also That is, in the light of the conventional light source, the light emitted from the image light source can pass through the rightmost light of the light transmitting portion 210 disposed on the left side of the external light absorbing portion 220 in Fig. 4, and the light L2 represents the formation of the concave portion 2 〇a (i.e., the present invention) can pass through the light emitted from the image light source through the rightmost light of the light transmitting portion 210 disposed on the left side of the external light absorbing portion 220. When the concave portion 200a is formed, A large amount of light can pass through the light transmitting portion 210 between the optical paths of the light L1 and the light L2, and thus the light transmission of the optical plate 2 can be increased' and the brightness of the image display device having the optical plate 200 can be increased. The optical plate 200, as described above, the groove g2i is formed in the light transmitting portion 210, and only a portion of each of the grooves g2 is filled with a light absorbing material to form the external light absorbing portion 220, And thus compared to conventional techniques, The filling process of the light absorbing material can be easily performed, and the manufacturing cost can be reduced. Further, a residue of the light absorbing material adhered to the light transmitting portion 210 may not be formed around the groove g2i 16 16 201007226 (this is a habit) In addition, when the width |22 of the external light absorbing portion 22 is in the range of 1 〇μπι to 40 μηη, the maximum depth of the depressed portion 2〇〇a is da+i, da, t And & can be in the range of 〇 1 to 2 。. Here, the width w220 of the external light absorbing portion 220 represents the width of the external light absorbing portion 220 corresponding to one end of the image light source side. The portion 220 has a trapezoidal cross section as illustrated in Fig. 2B, and • the width W22G of the external light absorbing portion 220 represents the width of the external light absorbing portion 220 corresponding to one end of the image light source side, that is, the maximum width. When the height h22 of the light absorbing portion 220 is in the range of 50 μm to 200 μm, the maximum depths 4+1, 屯, t, and da_2 of the depressed portion 2〇〇a may be in the range of 0.1 μm to 2 μm. The optical plate 200 of the present embodiment of the invention may further include a dam portion disposed on one surface of the base film 230 (i.e., a surface opposite to the surface on which the light transmitting portion 21 is disposed) (not shown for forming a rib The material of the mirror portion may be the same as or similar to the material used to form the light transmitting portion 210. By including the germanium portion, the optical sheet 2's may have a higher external light absorptivity' and thus have an enhanced contrast ratio and Higher resolution, and the transmittance does not change greatly. An optical plate or a light ray having the structure as described above may be included in the image display device 'so the defect visibility of the image display device (for example, white line visibility) And other defect visibility) can be reduced, the quality of the image can be improved, the contrast ratio can be increased, and high-resolution images can be obtained. Hereinafter, the present invention will now be described in more detail with reference to the following examples. 17 201007226 31993pifl However, such examples are given for illustrative purposes and not for purposes of limitation. Example 1 A molding roll was produced which was formed with a plurality of protrusions on one surface thereof, each of which had a quadrangular side cross section. Next, 1 〇〇g of a mixed solution of a propylene-based curable resin having a lower refractive index (Sartomer, CN-981) was used by using a pattern roll apparatus equipped with an ultraviolet (UV) line generating device (refractive index: 148) Slowly added between a molding roll and an optical PET film (manufactured by Toyobo Co., Ltd.) having a thickness of 188 μm and solidified to form light having a concave groove having a pattern opposite to that of the protrusion of the molding roll. Transmissive part. The refractive index of the light transmitting portion was 1.51. Herein, the optical PET film constitutes a base film. A broken dispersion (refractive index: 1.49) prepared by mixing 2 g of carbon black with bismuth (8) g of a propylene-based curable resin mixed solution (Sart 〇mer, CN-985) was spread on a groove, and then used. A doctor blade formed of a soft plastic is used to perform scratching to uniformly fill the grooves, thereby forming a plurality of external light absorbing portions having a refractive index of 1.52, and then forming a plurality of depressed portions having an average maximum depth of 3 μm. Swing the squeegee at a rate of 3 rpm to 20 rpm, and perform the shaving while adjusting the difference between the 0 max depths of the adjacent two recessed portions |Δ (1| to 0.01 μm to 1 μηη) Then, 'the UV-ray is used to cure the propylene-based curable resin of the carbon dispersion, thereby obtaining an optical plate including the depressed portion as illustrated in Fig. 3. Here, the distance between the light-transmitting portions is 74 μm, The height and width of the external light absorbing portion are 102 μm and 24 μm, respectively, and the thickness of the light transmitting portion is 150 μm. The distance between the light transmitting portions is 18 of the position corresponding to the adjacent portion of the light transmitting portion divided by the external light absorbing portion. 201007226 j Distance between lyyjpul. Comparative Example 光学 An optical plate was fabricated in the same manner as in Example 1, except that the scraping and knife scraping process was performed three times while the maximum depth between two adjacent depressed portions was Difference | Δ(1| is adjusted to be less than 〇.〇1 μιη. Comparatively, you 制造9 The optical plate is manufactured in the same manner as in Example 1, except that it is performed at a swing rate of less than 3 φ 11) 111 Scratch the process with a squeegee to adjust the difference between the maximum depths of two adjacent recessed portions |Δ(1| to within the range of 1 μηη to 3 μηη. Assessing the actual optical plate produced by the manufacturer Evaluation. The results are shown in Table 1. Table i contains information on whether to view white lines and other defects, and the turbidity value (%H) measured using ASTM D1003. In this paper, white lines and other defects are identified with the naked eye. 〇" indicates that the white line and other defects are recognized by the naked eye' and "X" indicates that the white line and other defects are not recognized by the naked eye. ® [Table 1] Example 1 Comparative Example 1 Comparative Example 2 White line XX 〇 Other defects X 0 X Turbidity value (%H) 13 3 32 Referring to Table 1, the optical plate manufactured according to Example 1 did not show white lines or other defects. However, in the case of the optical plate manufactured according to Comparative Example i, the depressed portion has Uniform depth, and therefore no white line is seen, 201007226 31993pifl kernel sees other defects. In the optical plate manufactured according to Comparative Example 2
If況下，未看到其他缺陷，但凹陷部分的深度不均勻，且 因此看到白線。另外，參看表〗，可看到存在適當範圍的 濁度值（％H)，在所述濁度值範圍中，白線可視度及其他 缺陷可視度均可減低。 、雖然已參考本發明之例示性實施例而特別繪示並描 述了本發明，但熟習此項技術者將理解，可在不脫離如由 附加之f請專職圍界定之本發明之精神及範圍的情況 下’對本發明之形式及細節做出各種修改。 【圖式簡單說明】 〆 圖1為根據本發明之-實施例的配備有包含光學板之 濾光器的影像顯示裝置的分解透視示意圖。 圖2A為根據本發明之一實施例的包含光學板之遽光 器的分解橫截面圖。 圖2B為根據本發明之另一實施例的包含光學板之 光器的分解橫截面圖。 圖3為圖2A之光學板的在光學板安裝於濾光器上之 前的局部放大圖。 圖4為圖3之光學板之部分a的放大圖。 【主要元件符號說明】 1:影像顯示裝置 10 :盒 20:驅動電路基板 30 :面板總成 201007226 31993pifl 40 :遽光器 50 :蓋 100:色彩調節膜 200 :光學板 200a :凹陷部分 210 :光透射部分 220 :外部光吸收部分 ^ 230 :基底膜 240 :保護膜 300 :電磁波屏蔽膜 400 :硬塗層 500 :反射防止膜 A ·部分 da :最大深度 da+1 :最大深度 :最大深度 β da_2 :最大深度 dinmx :最大深度 FB :濾光器基座 g210 :凹槽 1^220 :而度 k :光 L2 :光 W22〇 :寬度 21In the case of If, no other defects were observed, but the depth of the depressed portion was not uniform, and thus the white line was seen. In addition, referring to the table, it can be seen that there is an appropriate range of turbidity values (%H) in which white line visibility and other defect visibility can be reduced. While the invention has been particularly shown and described with reference to the exemplary embodiments of the present invention, it will be understood by those skilled in the art In the case of the invention, various modifications are made in the form and details of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view showing an image display apparatus equipped with an optical filter including an optical plate according to an embodiment of the present invention. 2A is an exploded cross-sectional view of a chopper comprising an optical plate in accordance with an embodiment of the present invention. Figure 2B is an exploded cross-sectional view of an optical device including an optical plate in accordance with another embodiment of the present invention. Figure 3 is a partial enlarged view of the optical plate of Figure 2A before the optical plate is mounted on the filter. Figure 4 is an enlarged view of a portion a of the optical plate of Figure 3. [Description of main component symbols] 1: Image display device 10: Case 20: Drive circuit substrate 30: Panel assembly 201007226 31993 pifl 40: Chopper 50: Cover 100: Color adjustment film 200: Optical plate 200a: Recessed portion 210: Light Transmissive portion 220: external light absorbing portion ^ 230: base film 240: protective film 300: electromagnetic wave shielding film 400: hard coat layer 500: anti-reflection film A · part da: maximum depth da+1: maximum depth: maximum depth β da_2 : Maximum depth dinmx : Maximum depth FB : Filter base g210 : Groove 1 ^ 220 : Degree k : Light L2 : Light W22 〇 : Width 21