TWI645218B - Light redirecting film - Google Patents

本發明乃提供一種三明治平板狀的光重導向膜，其包括一第一層；一第二層；以及一中間層，夾於該第一層與該第二層之間，且該中間層包括一具有複數沿第一方向延伸的第一光柵的第一光柵表面，以及一具有複數沿第二方向延伸的第二光柵的第二光柵表面，且該第一方向與該第二方向相交於一角度介於90°±10°之間；其中，該中間層的該第一光柵表面係被該第一層填滿且平坦化，而該中間層的該第二光柵表面則係被該第二層填滿且平坦化。The present invention provides a sandwich flat light redirecting film including a first layer, a second layer, and an intermediate layer sandwiched between the first layer and the second layer, and the intermediate layer includes A first grating surface having a plurality of first gratings extending along a first direction, and a second grating surface having a plurality of second gratings extending along a second direction, and the first direction intersects the second direction at a The angle is between 90 ° ± 10 °; wherein the first grating surface of the intermediate layer is filled and flattened by the first layer, and the second grating surface of the intermediate layer is filled by the second The layers are filled and flattened.

光重導向膜Light redirecting film

本發明是關於一種光重導向膜，且更特地是關於一種光重導向膜，可提昇顯示器在廣視角時之光學效率，例如對比、色飽和度及色彩精確性。The present invention relates to a light redirecting film, and more particularly to a light redirecting film, which can improve the optical efficiency of a display at a wide viewing angle, such as contrast, color saturation, and color accuracy.

具有高對比、無灰階反轉、微色偏、高亮度、色彩豐富、高色彩飽和度、快速響應速度及廣視角等特性的顯示器是目前的市場趨勢液晶是一種具有高效率折射率且被廣泛用於顯示器的調節材料，但液晶分子在不同視角時具有不同的對稱性，故垂直光跟斜向光通過顯示器之液晶層時將會有不同的路徑。因此，一般的顯示器例如液晶顯示器、有機發光二極體顯示器特別容易在廣視角時出現畫面泛白(color washout)或灰階反轉(gray-scale inversion)現象，導致影像具有較低的對比或異常的色彩表現。Displays with characteristics such as high contrast, no grayscale inversion, slight color shift, high brightness, rich colors, high color saturation, fast response speed, and wide viewing angle are the current market trends. Liquid crystal is a kind of high-efficiency refractive index and is It is widely used as the adjustment material of the display, but the liquid crystal molecules have different symmetry at different viewing angles, so vertical light and oblique light will have different paths when passing through the liquid crystal layer of the display. Therefore, common displays such as liquid crystal displays and organic light emitting diode displays are particularly prone to color washout or gray-scale inversion at wide viewing angles, resulting in images with lower contrast or Unusual color performance.

目前，已有數種可改善上述缺點的方法被提出，例如藉由使扭轉向列型(TN)液晶顯示器搭配使用一廣視角膜，以均等化中央視角及廣視角下的影像；使用廣視角(MVA)顯示器或者在顯示器表面貼覆一擴散膜或繞射膜。At present, several methods have been proposed to improve the above disadvantages. For example, by using a wide-angle film with a twisted nematic (TN) liquid crystal display to equalize the central and wide-view images; use a wide-view ( MVA) display or a diffusing film or diffractive film is pasted on the display surface.

然而，扭轉向列型(TN)液晶顯示器用的廣視角膜價格昂貴；廣視角顯示器的製程複雜，且良率低、成本高；擴散膜則不易精準控制自顯示器不同角度射出的光線；繞射膜則不易藉由一單一繞射結構層同步控制不同維度的光路徑。However, wide-viewing-angle films for twisted nematic (TN) liquid crystal displays are expensive; wide-viewing-angle displays have complex manufacturing processes with low yields and high costs; diffuser films are difficult to accurately control light emitted from different angles of the display; diffraction The film is not easy to control the light paths of different dimensions by a single diffraction structure layer.

因此，本發明乃揭示一種適用於顯示器且具有二維度(2D)繞射結構的光重導向膜，以避免顯示器在廣視角時出現畫面泛白(color washout)或灰階反轉(gray-scale inversion)現象，並且提昇顯示器的效率。Therefore, the present invention discloses a light redirecting film suitable for a display and having a two-dimensional (2D) diffractive structure, so as to avoid color washout or gray-scale inversion of the display at a wide viewing angle. inversion) phenomenon, and improve the efficiency of the display.

本發明乃提供一種三明治平板狀的光重導向膜，其包括一第一層；一第二層；以及一中間層，夾於該第一層與該第二層之間，且該中間層包括一具有複數沿第一方向延伸的第一光柵的第一光柵表面，以及一具有複數沿第二方向延伸的第二光柵的第二光柵表面，且該第一方向與該第二方向相交於一角度介於90°±10°之間；其中，該中間層的該第一光柵表面係被該第一層填滿且平坦化，而該中間層的該第二光柵表面則係被該第二層填滿且平坦化。The present invention provides a sandwich flat light redirecting film including a first layer, a second layer, and an intermediate layer sandwiched between the first layer and the second layer, and the intermediate layer includes A first grating surface having a plurality of first gratings extending along a first direction, and a second grating surface having a plurality of second gratings extending along a second direction, and the first direction intersects the second direction at a The angle is between 90 ° ± 10 °; wherein the first grating surface of the intermediate layer is filled and flattened by the first layer, and the second grating surface of the intermediate layer is filled by the second The layers are filled and flattened.

本發明之另一特徵是提供一種如上所述之光重導向膜，且該第一層之折射率為n1，該中間層的折射率為n2，該第二層之折射率為n3，其中n1、n2、n3均介於1.4至1.7之間。Another feature of the present invention is to provide a light redirecting film as described above, and the refractive index of the first layer is n1, the refractive index of the intermediate layer is n2, and the refractive index of the second layer is n3, where n1 , N2, n3 are all between 1.4 and 1.7.

本發明之另一特徵是提供一種如上所述之光重導向膜，且n2大於n1與n3。Another feature of the present invention is to provide a light redirecting film as described above, and n2 is larger than n1 and n3.

本發明之又一特徵是提供一種如上所述之光重導向膜，且n1與n3相同或相異。Another feature of the present invention is to provide a light redirecting film as described above, and n1 and n3 are the same or different.

本發明之又一特徵是提供一種如上所述之光重導向膜，且n2與n1的差值不小於0.1且不大於0.3。Another feature of the present invention is to provide a light redirecting film as described above, and the difference between n2 and n1 is not less than 0.1 and not more than 0.3.

本發明之又一特徵是提供一種如上所述之光重導向膜，且n2與n3的差值不小於0.1且不大於0.3。Another feature of the present invention is to provide a light redirecting film as described above, and the difference between n2 and n3 is not less than 0.1 and not more than 0.3.

本發明之又一特徵是提供一種如上所述之光重導向膜，且每一該等第一光柵之寬度為w1，每一該等第二光柵之寬度為w2，且w1、w2各自獨立介於0.3mm至1.5mm之間。Another feature of the present invention is to provide a light redirecting film as described above, and each of the first gratings has a width of w1, and each of the second gratings has a width of w2, and w1 and w2 are independently introduced. Between 0.3mm and 1.5mm.

本發明之又一特徵是提供一種如上所述之光重導向膜，且每一該等第一光柵之深度為d1，每一該等第二光柵之深度為d2，且d1、d2各自獨立介於0.5mm至1.5mm之間。Another feature of the present invention is to provide a light redirecting film as described above, wherein the depth of each of the first gratings is d1, the depth of each of the second gratings is d2, and d1 and d2 are independent of each other. Between 0.5mm and 1.5mm.

本發明之又一特徵是提供一種如上所述之光重導向膜，且兩相鄰的該等第一光柵之間的間距為g1，兩相鄰該等第二光柵之間的間距為g2，且g1、g2各自獨立介於0.3mm至1.5mm之間。Another feature of the present invention is to provide a light redirecting film as described above, and a distance between two adjacent first gratings is g1, and a distance between two adjacent second gratings is g2, And g1 and g2 are each independently between 0.3mm and 1.5mm.

本發明之再一特徵是提供一種如上所述之光重導向膜，且其中每一該等第一光柵及每一該等第二光柵的寬度、深度、兩相鄰的該等第一光柵之間的間距以及兩相鄰的每一該等第二光柵之間的間距可為相同或相異Still another feature of the present invention is to provide a light redirecting film as described above, and wherein each of the first gratings and each of the second gratings has a width, a depth, and two adjacent ones of the first gratings. The spacing between two adjacent second gratings may be the same or different.

本發明之又一特徵是提供一種如上所述之光重導向膜，且更包括一光學膜黏著於該光重導向膜上，其中該光學膜可選自由偏光膜、硬塗膜、高反射膜、抗反射膜、抗眩光膜及保護膜所構成群組的其中之一或其組合。Another feature of the present invention is to provide a light redirecting film as described above, and further includes an optical film adhered to the light redirecting film, wherein the optical film can be selected from a polarizing film, a hard coating film, and a high reflection film. One, or a combination thereof, of an anti-reflection film, an anti-glare film, and a protective film.

上述發明內容旨在提供本揭示內容的簡化摘要，以使閱讀者對本揭示內容具備基本的理解。此發明內容並非本揭示內容的完整概述，且其用意並非在指出本發明實施例的重要/關鍵元件或界定本發明的範圍。在參閱下文實施方式後，本發明所屬技術領域中具有通常知識者當可輕易瞭解本發明之基本精神以及本發明所採用之技術手段與實施態樣。The above summary is intended to provide a simplified summary of the present disclosure so that the reader may have a basic understanding of the present disclosure. This summary is not a comprehensive overview of the disclosure, and it is not intended to indicate important / critical elements of the embodiments of the invention or to define the scope of the invention. After referring to the following embodiments, those with ordinary knowledge in the technical field to which the present invention pertains can easily understand the basic spirit of the present invention and the technical means and implementation modes adopted by the present invention.

為了使本發明揭示內容的敘述更加詳盡與完備，下文針對了本發明的實施態樣與具體實施例提出了說明性的描述；但這並非實施或運用本發明具體實施例的唯一形式。以下所揭露的各實施例，在有益的情形下可相互組合或取代，也可在一實施例中附加其他的實施例，而無須進一步的記載或說明。In order to make the description of the disclosure of the present invention more detailed and complete, the following provides an illustrative description of the implementation mode and specific embodiments of the present invention; however, this is not the only form of implementing or using the specific embodiments of the present invention. The embodiments disclosed below can be combined or replaced with each other under beneficial circumstances, and other embodiments can be added to an embodiment without further description or description.

實施例Examples

首先，請參照第1A~1B圖。第1A圖所繪示的是根據本發明之一較佳實施例所揭示的光重導向膜10的立體透視圖，如第1A圖所示，此光重導向膜10是一個三明治平板結構。第1B圖所繪示的是如第1A圖所示的光重導向膜之中間層14的第一光柵表面14a與第二光柵表面14b的立體透視圖。如第1A圖所示，此光重導向膜10包括一第一層12、一第二層16以及一夾於該第一層12與該第二層16之間的中間層14。如第1B圖所示，中間層14包括一具有複數沿第一方向(D1)延伸的第一光柵141的第一光柵層14a，以及一具有複數沿第二方向(D2)延伸的第二光柵142的第二光柵層14b，且第一方向(D1)與第二方向(D2)相交於一角度介於90°±10°之間。此外，如第1A圖所示，該中間層14的第一光柵表面14a係被該第一層12填滿且平坦化，而該中間層14的第二光柵表面14b則係被該第二層16填滿且平坦化。First, please refer to Figures 1A ~ 1B. FIG. 1A illustrates a perspective view of a light redirecting film 10 according to a preferred embodiment of the present invention. As shown in FIG. 1A, the light redirecting film 10 is a sandwich flat structure. FIG. 1B is a perspective view of the first grating surface 14 a and the second grating surface 14 b of the intermediate layer 14 of the light redirecting film shown in FIG. 1A. As shown in FIG. 1A, the light redirecting film 10 includes a first layer 12, a second layer 16, and an intermediate layer 14 sandwiched between the first layer 12 and the second layer 16. As shown in FIG. 1B, the intermediate layer 14 includes a first grating layer 14a having a plurality of first gratings 141 extending in a first direction (D1), and a second grating having a plurality of gratings extending in a second direction (D2). The second grating layer 14b of 142, and the first direction (D1) and the second direction (D2) intersect at an angle between 90 ° ± 10 °. In addition, as shown in FIG. 1A, the first grating surface 14a of the intermediate layer 14 is filled and planarized by the first layer 12, and the second grating surface 14b of the intermediate layer 14 is covered by the second layer. 16 is filled and flattened.

根據本發明一實施例，第一層12之折射率為了n1，中間層14的折射率為n2，第二層16的折射率為n3，且n1、n2、n3均介於1.4至1.7之間。此外，第一層12、中間層14、第二層16的材質可選自UV可固化的樹脂或熱可固化的樹脂，例如壓克力樹脂、矽利康樹脂、聚氨酯樹脂、環氧樹脂或其組合。According to an embodiment of the present invention, the refractive index of the first layer 12 is n1, the refractive index of the intermediate layer 14 is n2, the refractive index of the second layer 16 is n3, and n1, n2, and n3 are all between 1.4 and 1.7. . In addition, the material of the first layer 12, the middle layer 14, and the second layer 16 may be selected from a UV curable resin or a heat curable resin, such as acrylic resin, silicon resin, polyurethane resin, epoxy resin, or the like. combination.

根據本發明另一實施例，n2大於n1與n3。According to another embodiment of the present invention, n2 is larger than n1 and n3.

根據本發明另一實施例，n1與n3相同或相異。According to another embodiment of the present invention, n1 and n3 are the same or different.

根據本發明另一實施例，n2與n1的差值不小於0.1且不大於0.3。According to another embodiment of the present invention, the difference between n2 and n1 is not less than 0.1 and not more than 0.3.

根據本發明另一實施例，n2與n3的差值不小於0.1且不大於0.3。According to another embodiment of the present invention, the difference between n2 and n3 is not less than 0.1 and not more than 0.3.

第一光柵表面14a上的該等第一光柵141及第二光柵表面14b上的該等第二光柵142的尺寸大小可取決於不同顯示器的設計來決定。請參照第1B圖及第2A、2B圖，如第2A圖所示，其乃沿如第1B圖所示之中間層14上的第一光柵表面14a的D2方向所繪示的剖視圖。根據本發明的一實施例，第2A圖所繪示的每一該等第一光柵141，其寬度w1介於0.3mm至1.5mm之間，且較佳的是介於0.4mm至0.6mm之間；其深度d1介於0.5mm至1.5mm之間，且較佳的是介於0.7mm至1.3mm之間；兩相鄰該等第一光柵141之間的間距g1則是介於0.3mm至1.5mm之間，且較佳的是介於0.4mm至0.6mm之間。此外，第一光柵表面14a上的該等第一光柵141可具有相同或相異的尺寸，且可依序、週期性或隨機形成於中間層14的第一光柵表面14a上。The size of the first gratings 141 on the first grating surface 14a and the second gratings 142 on the second grating surface 14b may be determined depending on the design of different displays. Please refer to FIG. 1B and FIGS. 2A and 2B. As shown in FIG. 2A, it is a cross-sectional view taken along the D2 direction of the first grating surface 14a on the intermediate layer 14 as shown in FIG. 1B. According to an embodiment of the present invention, the width w1 of each of the first gratings 141 shown in FIG. 2A is between 0.3 mm and 1.5 mm, and preferably between 0.4 mm and 0.6 mm. The depth d1 is between 0.5mm and 1.5mm, and preferably between 0.7mm and 1.3mm; the distance g1 between two adjacent first gratings 141 is between 0.3mm Between 1.5 mm and preferably between 0.4 mm and 0.6 mm. In addition, the first gratings 141 on the first grating surface 14 a may have the same or different sizes, and may be sequentially, periodically, or randomly formed on the first grating surface 14 a of the intermediate layer 14.

如第2B圖所示，其乃沿如第1B圖所示之中間層14上的第二光柵表面14b的D1方向所繪示的剖視圖。根據本發明的一實施例，第2B圖所繪示的每一該等第二光柵142，其寬度w2介於0.3mm至1.5mm之間，且較佳的是介於0.4mm至0.6mm之間；其深度d2介於0.5mm至1.5mm之間，且較佳的是介於0.7mm至1.3mm之間；兩相鄰該等第二光柵142之間的間距g2則是介於0.3mm至1.5mm之間，且較佳的是介於0.4mm至0.6mm之間。此外，第二光柵表面14b上的該等第二光柵142可具有相同或相異的尺寸，且可依序、週期性或隨機形成於中間層14的第二光柵表面14b上。As shown in FIG. 2B, it is a cross-sectional view taken along the D1 direction of the second grating surface 14 b on the intermediate layer 14 as shown in FIG. 1B. According to an embodiment of the present invention, the width w2 of each of the second gratings 142 shown in FIG. 2B is between 0.3 mm and 1.5 mm, and preferably between 0.4 mm and 0.6 mm. The depth d2 is between 0.5mm and 1.5mm, and preferably between 0.7mm and 1.3mm; the distance g2 between two adjacent second gratings 142 is between 0.3mm Between 1.5 mm and preferably between 0.4 mm and 0.6 mm. In addition, the second gratings 142 on the second grating surface 14 b may have the same or different sizes, and may be sequentially, periodically, or randomly formed on the second grating surface 14 b of the intermediate layer 14.

中間層14的第一光柵表面14a及第二光柵表面14b可用來改善面板於水平視角以及垂直視角常見的畫面泛白(color washout)現象和灰階反轉(gray-scale inversion)現象。此外，該等第一光柵141以及該等第二光柵142的尺寸，例如寬度、高度以及間距，可視不同顯示器的需求而各自獨立設定為相同或相異尺寸。根據本發明的一實施例，第一光柵表面14a上的該等第一光柵141與第二光柵表面14b上的該等第二光柵142具有相同的寬度、高度以及間隔。根據本發明的另一實施例，第一光柵表面14a上的該等第一光柵141與第二光柵表面14b上的該等第二光柵142具有相異的寬度、高度以及間隔。The first grating surface 14a and the second grating surface 14b of the intermediate layer 14 can be used to improve the color washout phenomenon and gray-scale inversion phenomenon that are common to the panel in horizontal and vertical viewing angles. In addition, the dimensions of the first gratings 141 and the second gratings 142, such as the width, height, and spacing, can be independently set to the same or different sizes according to the needs of different displays. According to an embodiment of the present invention, the first gratings 141 on the first grating surface 14a and the second gratings 142 on the second grating surface 14b have the same width, height, and interval. According to another embodiment of the present invention, the first gratings 141 on the first grating surface 14a and the second gratings 142 on the second grating surface 14b have different widths, heights, and intervals.

面板(例如LCD)上的每一個畫素所發出之光線，可分別穿越第一光柵表面14a及第二光柵表面14b，故面板(例如LCD)上的每一個畫素所發出之光線可被重新被導向於想要的角度。此外，相較於由兩片薄片狀的習知繞射層所構成的光重導向膜，本發明所揭示的單一光重導向膜可省略用於習知繞射層所需的個別覆蓋層，且可簡化設計使用具有不同折射率的材料於不同層。此外，整合堆疊結構所形成的光重導向膜可降低光穿透顯示器時所造成的干擾。The light emitted by each pixel on the panel (such as LCD) can pass through the first grating surface 14a and the second grating surface 14b respectively, so the light emitted by each pixel on the panel (such as LCD) can be re-used. Be directed at the desired angle. In addition, compared to a light redirecting film composed of two thin conventional diffraction layers, the single light redirecting film disclosed in the present invention can omit the individual covering layer required for the conventional diffraction layer. And the design can be simplified by using materials with different refractive indices in different layers. In addition, the light redirecting film formed by the integrated stacked structure can reduce the interference caused when light penetrates the display.

根據本發明的另一實施例，該光重導向膜10更可黏著至少一光學膜，例如偏光膜、硬塗佈膜、低反射膜、抗反射膜、抗眩光膜及保護膜等，或者直接黏著於一顯示面板上。According to another embodiment of the present invention, the light redirecting film 10 can be adhered to at least one optical film, such as a polarizing film, a hard coating film, a low reflection film, an anti-reflection film, an anti-glare film, and a protective film, or directly Adhered to a display panel.

根據本發明的另一實施例，該光重導向膜10是黏著於一偏光膜上，該偏光膜具有一吸收軸(未繪示)，且該吸收軸係平行於該第一光柵141所延伸的第一方向D1或該第二光柵142所延伸的第二方向D2。According to another embodiment of the present invention, the light redirecting film 10 is adhered to a polarizing film. The polarizing film has an absorption axis (not shown), and the absorption axis system extends parallel to the first grating 141. A first direction D1 or a second direction D2 of the second grating 142.

請參照第3A圖，其所繪示的是根據本發明之另一較佳實施例所揭示的光重導向膜的立體透視圖。如第3A圖所示，一包含一第一保護層181、一偏光層182及一第二保護層183的偏光膜18係藉由其第一保護層181而黏著於光重導向層10的第二層16上。根據本發明的又一實施例，偏光膜18也可藉由第一保護層181而黏著於光重導向層10的第二層16上的一黏著層(未繪示)上。Please refer to FIG. 3A, which illustrates a perspective view of a light redirecting film according to another preferred embodiment of the present invention. As shown in FIG. 3A, a polarizing film 18 including a first protective layer 181, a polarizing layer 182, and a second protective layer 183 is adhered to the first portion of the light redirecting layer 10 through its first protective layer 181. 16 on the second floor. According to another embodiment of the present invention, the polarizing film 18 may be adhered to an adhesive layer (not shown) on the second layer 16 of the light redirecting layer 10 through the first protective layer 181.

接著，請參照第3B圖，其所繪示的是根據本發明之另一較佳實施例所揭示的光重導向膜的立體透視圖。如第3B圖所示，該光重導向膜10是被當作一整合偏光膜19的保護膜，該整合偏光膜19包括一第一保護層191及一偏光層192，而該光重導向層10則是藉由其第二層16被黏著於該整合偏光膜19的該偏光層192上，故該光重導向膜10可作為該整合偏光膜19的保護膜。Next, please refer to FIG. 3B, which illustrates a perspective view of a light redirecting film according to another preferred embodiment of the present invention. As shown in FIG. 3B, the light redirecting film 10 is used as a protective film of an integrated polarizing film 19. The integrated polarizing film 19 includes a first protective layer 191 and a polarizing layer 192, and the light redirecting layer 19 10 is adhered to the polarizing layer 192 of the integrated polarizing film 19 through its second layer 16, so the light redirecting film 10 can serve as a protective film of the integrated polarizing film 19.

實施例1Example 1

本實施例1所揭示的光重導向膜10之中間層14包括一第一光柵表面14a及一第二光柵表面14b，且該第一光柵表面14a與該第二光柵表面14b位於相對面，且複數如表一所示具有不同尺寸大小的光柵1~11係依序、週期性地分別形成於第一光柵表面14a及第二光柵表面14b，其中位在該第一光柵表面14a上的該等第一光柵141及位在該第二光柵表面14b上的該等第二光柵142之尺寸大小與形狀均相同，惟第一光柵141是沿第一方向D1延伸，而第二光柵142則是沿第二方向D2延伸，且第一方向D1與第二方向D2相交於一角度介於90°±10°之間。此外，光重導向層10中的第一層12之折射率為1.5，中間層14的折射率為1.6，第二層16的折射率為1.5。第一、第二光柵表面14a、14b上的光柵數目多寡可視需要加以調整，並將此光重導向膜10黏附至液晶顯示器(型號:HERAN 504K-C1(296H01)，購於台灣)後，量測液晶顯示器在不同水平及垂直視角下的伽馬值(Gamma value)。 表一：光重導向膜之中間層上的光柵尺寸<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 光柵尺寸 </td><td> 光柵 </td></tr><tr><td> 1 </td><td> 2 </td><td> 3 </td><td> 4 </td><td> 5 </td><td> 6 </td><td> 7 </td><td> 8 </td><td> 9 </td><td> 10 </td><td> 11 </td></tr><tr><td> w1, w2寬度 (μm) </td><td> 0.6 </td><td> 0.6 </td><td> 0.5 </td><td> 0.4 </td><td> 0.5 </td><td> 0.6 </td><td> 0.6 </td><td> 0.5 </td><td> 0.4 </td><td> 0.4 </td><td> 0.4 </td></tr><tr><td> d1, d2深度 (μm) </td><td> 1.3 </td><td> 0.8 </td><td> 0.9 </td><td> 0.8 </td><td> 1.1 </td><td> 1.0 </td><td> 1.2 </td><td> 1.0 </td><td> 0.7 </td><td> 0.8 </td><td> 0.8 </td></tr><tr><td> g1, g2間距 (μm) </td><td> 0.6 </td><td> 0.6 </td><td> 0.6 </td><td> 0.4 </td><td> 0.4 </td><td> 0.6 </td><td> 0.4 </td><td> 0.6 </td><td> 0.5 </td><td> 0.5 </td><td> 0.4 </td></tr></TBODY></TABLE>The intermediate layer 14 of the light redirecting film 10 disclosed in this embodiment 1 includes a first grating surface 14a and a second grating surface 14b, and the first grating surface 14a and the second grating surface 14b are located on opposite sides, and The plurality of gratings 1 to 11 having different sizes as shown in Table 1 are sequentially and periodically formed on the first grating surface 14a and the second grating surface 14b, respectively. The size and shape of the first grating 141 and the second gratings 142 on the second grating surface 14b are the same, but the first grating 141 extends along the first direction D1, and the second grating 142 extends along the first direction D1. The second direction D2 extends, and the first direction D1 and the second direction D2 intersect at an angle between 90 ° ± 10 °. In addition, the refractive index of the first layer 12 in the light redirecting layer 10 is 1.5, the refractive index of the intermediate layer 14 is 1.6, and the refractive index of the second layer 16 is 1.5. The number of gratings on the first and second grating surfaces 14a, 14b can be adjusted as needed, and the light redirecting film 10 is adhered to a liquid crystal display (model: HERAN 504K-C1 (296H01), purchased in Taiwan). Measure the Gamma value of the LCD under different horizontal and vertical viewing angles. Table 1: Grating dimensions on the middle layer of the light redirecting film <TABLE border = "1" borderColor = "# 000000" width = "85%"><TBODY><tr><td> Grating dimensions </ td><td> Grating </ td></tr><tr><td> 1 </ td><td> 2 </ td><td> 3 </ td><td> 4 </ td><td> 5 </ td><td> 6 </ td><td> 7 </ td><td> 8 </ td><td> 9 </ td><td> 10 </ td><td> 11 </ td></tr><tr><td> w1, w2 width (μm) </ td><td> 0.6 </ td><td> 0.6 </ td><td> 0.5 </ td><td> 0.4 </ td><td> 0.5 </ td><td> 0.6 </ td><td> 0.6 </ td><td> 0.5 </ td><td> 0.4 </ td><td> 0.4 < / td><td> 0.4 </ td></tr><tr><td> d1, d2 depth (μm) </ td><td> 1.3 </ td><td> 0.8 </ td><td> 0.9 </ td><td> 0.8 </ td><td> 1.1 </ td><td> 1.0 </ td><td> 1.2 </ td><td> 1.0 </ td><td> 0.7 </ td><td> 0.8 </ td><td> 0.8 </ td></tr><tr><td> g1, g2 pitch (μm) </ td><td> 0.6 </ td><td> 0.6 </ td><td> 0.6 </ td><td> 0.4 </ td><td> 0.4 </ td><td> 0.6 </ td><td> 0.4 </ td><td> 0.6 </ td><td> 0.5 </ td><td> 0.5 </ td><td> 0.4 </ td></tr></TBODY></TABLE>

實施例2Example 2

本實施例2所揭示的光重導向膜10之中間層14包括一第一光柵表面14a及一第二光柵表面14b，且該第一光柵表面14a與該第二光柵表面14b位於相對面，且複數如表一所示具有不同尺寸大小的光柵1~11係依序、週期性地分別形成於第一光柵表面14a上，而複數如表二所示具有不同尺寸大小的光柵12~20則係依序、週期性地分別形成於第二光柵表面14b上，其中位在該第一光柵表面14a上的該等第一光柵141及位在該第二光柵表面14b上的該等第二光柵142之尺寸大小與形狀相異，且第一光柵141是沿第一方向D1延伸，而第二光柵142則是沿第二方向D2延伸，且第一方向D1與第二方向D2相交於一角度介於90°±10°之間。此外，光重導向層10中的第一層12之折射率為1.5，中間層14的折射率為1.6，第二層16的折射率為1.5。第一、第二光柵表面14a、14b上的光柵數目多寡可視需要加以調整，並將此光重導向膜黏附至液晶顯示器(型號:HERAN 504K-C1(296H01)，購於台灣)後，量測液晶顯示器在不同水平及垂直視角下的伽馬值(Gamma value)。 表二： 光重導向膜之中間層上的光柵尺寸<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 光柵尺寸 </td><td> 光柵 </td></tr><tr><td> 12 </td><td> 13 </td><td> 14 </td><td> 15 </td><td> 16 </td><td> 17 </td><td> 18 </td><td> 19 </td><td> 20 </td></tr><tr><td> w2寬度 (μm) </td><td> 0.7 </td><td> 0.7 </td><td> 0.7 </td><td> 0.81 </td><td> 0.81 </td><td> 0.81 </td><td> 1.28 </td><td> 1.28 </td><td> 1.28 </td></tr><tr><td> d2深度 (μm) </td><td> 0.9 </td><td> 0.9 </td><td> 0.9 </td><td> 0.9 </td><td> 0.9 </td><td> 0.9 </td><td> 1.0 </td><td> 1.0 </td><td> 1.0 </td></tr><tr><td> g2間距 (μm) </td><td> 0.7 </td><td> 0.7 </td><td> 0.7 </td><td> 0.81 </td><td> 0.81 </td><td> 0.81 </td><td> 1.28 </td><td> 1.28 </td><td> 1.28 </td></tr></TBODY></TABLE>The intermediate layer 14 of the light redirecting film 10 disclosed in this embodiment 2 includes a first grating surface 14a and a second grating surface 14b, and the first grating surface 14a and the second grating surface 14b are located on opposite sides, and The complex numbers 1 to 11 with different sizes as shown in Table 1 are sequentially and periodically formed on the first grating surface 14a, and the complex numbers 12 to 20 with different sizes as shown in Table 2 are Sequentially and periodically formed on the second grating surface 14b, wherein the first gratings 141 on the first grating surface 14a and the second gratings 142 on the second grating surface 14b are respectively formed. The size and shape are different, and the first grating 141 extends along the first direction D1, while the second grating 142 extends along the second direction D2, and the first direction D1 and the second direction D2 intersect at an angle. Between 90 ° ± 10 °. In addition, the refractive index of the first layer 12 in the light redirecting layer 10 is 1.5, the refractive index of the intermediate layer 14 is 1.6, and the refractive index of the second layer 16 is 1.5. The number of gratings on the first and second grating surfaces 14a, 14b can be adjusted as needed, and the light redirecting film is adhered to the liquid crystal display (model: HERAN 504K-C1 (296H01), purchased in Taiwan), and then measured Gamma value of liquid crystal display under different horizontal and vertical viewing angles. Table 2: Grating dimensions on the middle layer of the light redirecting film <TABLE border = "1" borderColor = "# 000000" width = "85%"><TBODY><tr><td> Grating dimensions </ td><td> Grating </ td></tr><tr><td> 12 </ td><td> 13 </ td><td> 14 </ td><td> 15 </ td><td> 16 </ td><td> 17 </ td><td> 18 </ td><td> 19 </ td><td> 20 </ td></tr><tr><td> w2 width (μm ) </ td><td> 0.7 </ td><td> 0.7 </ td><td> 0.7 </ td><td> 0.81 </ td><td> 0.81 </ td><td> 0.81 < / td><td> 1.28 </ td><td> 1.28 </ td><td> 1.28 </ td></tr><tr><td> d2 depth (μm) </ td><td> 0.9 </ td><td> 0.9 </ td><td> 0.9 </ td><td> 0.9 </ td><td> 0.9 </ td><td> 0.9 </ td><td> 1.0 </ td><td> 1.0 </ td><td> 1.0 </ td></tr><tr><td> g2 pitch (μm) </ td><td> 0.7 </ td><td> 0.7 < / td><td> 0.7 </ td><td> 0.81 </ td><td> 0.81 </ td><td> 0.81 </ td><td> 1.28 </ td><td> 1.28 </ td ><td> 1.28 </ td></tr></TBODY></TABLE>

實施例3Example 3

本實施例3所揭示的光重導向膜10之中間層14包括一第一光柵表面14a及一第二光柵表面14b，且該第一光柵表面14a與該第二光柵表面14b位於相對面，且複數如表二所示具有不同尺寸大小的光柵12~20係依序、週期性地分別形成於第一光柵表面14a及第二光柵表面14b，其中位在該第一光柵表面14a上的該等第一光柵141及位在該第二光柵表面14b上的該等第二光柵142之尺寸大小與形狀均相同，惟第一光柵141是沿第一方向D1延伸，而第二光柵142則是沿第二方向D2延伸，且第一方向D1與第二方向D2相交於一角度介於90°±10°之間。此外，光重導向層10中的第一層12之折射率為1.5，中間層14的折射率為1.6，第二層16的折射率為1.5。第一、第二光柵表面14a、14b上的光柵數目多寡可視需要加以調整，並將此光重導向膜10黏附至液晶顯示器(型號: BenQ GW2270，購於台灣)後，量測液晶顯示器在不同水平及垂直視角下的伽馬值(Gamma value)。The intermediate layer 14 of the light redirecting film 10 disclosed in this embodiment 3 includes a first grating surface 14a and a second grating surface 14b, and the first grating surface 14a and the second grating surface 14b are located on opposite sides, and The plurality of gratings 12 to 20 having different sizes as shown in Table 2 are sequentially and periodically formed on the first grating surface 14a and the second grating surface 14b, respectively. The size and shape of the first grating 141 and the second gratings 142 on the second grating surface 14b are the same, but the first grating 141 extends along the first direction D1, and the second grating 142 extends along the first direction D1. The second direction D2 extends, and the first direction D1 and the second direction D2 intersect at an angle between 90 ° ± 10 °. In addition, the refractive index of the first layer 12 in the light redirecting layer 10 is 1.5, the refractive index of the intermediate layer 14 is 1.6, and the refractive index of the second layer 16 is 1.5. The number of gratings on the first and second grating surfaces 14a and 14b can be adjusted as needed, and the light redirecting film 10 is adhered to a liquid crystal display (model: BenQ GW2270, purchased in Taiwan). Gamma value at horizontal and vertical viewing angles.

比較例1Comparative Example 1

以液晶顯示器(型號:HERAN 504K-C1(296H01)，購於台灣)作為比較例1，量測此液晶顯示器在未黏附本發明之光重導向膜時在不同水平及垂直視角下的伽馬值(Gamma value)。A liquid crystal display (model: HERAN 504K-C1 (296H01), purchased from Taiwan) was used as Comparative Example 1. The gamma values of the liquid crystal display under different horizontal and vertical viewing angles were measured when the light redirecting film of the present invention was not adhered. (Gamma value).

比較例2Comparative Example 2

以液晶顯示器(型號:BenQ GW2270，購於台灣)作為比較例2，量測此液晶顯示器在未黏附本發明之光重導向膜時在不同水平及垂直視角下的伽馬值(Gamma value)。A liquid crystal display (model: BenQ GW2270, purchased from Taiwan) was used as Comparative Example 2 to measure the Gamma value of this liquid crystal display under different horizontal and vertical viewing angles when the light redirecting film of the present invention was not attached.

伽馬值(Gamma value)是一種反應顯示器之對比及色彩飽和度的指標，較高的伽馬值代表該顯示器可提供較佳的對比及色彩飽和度。Gamma value is an indicator that reflects the contrast and color saturation of a display. A higher gamma value indicates that the display can provide better contrast and color saturation.

實施例1~3搭配根據本發明所揭示的光重導向膜的液晶顯示器在不同水平視角下所量測到的伽馬值(Gamma value)，及比較例1~2未搭配根據本發明所揭示的光重導向膜的液晶顯示器在不同水平視角下所量測到的伽馬值(Gamma value)，詳細量測到的伽馬值(Gamma value)如以下表三所示： 表三：在不同水平視角下所量測到 的 伽馬 值 (Gamma value)<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 水平視角 </td><td> 0^o</td><td> 10^o</td><td> 20^o</td><td> 30^o</td><td> 40^o</td><td> 50^o</td><td> 60^o</td><td> 70^o</td><td> 80^o</td></tr><tr><td> 比較例1 </td><td> 2.24 </td><td> 2.03 </td><td> 1.71 </td><td> 1.44 </td><td> 1.23 </td><td> 1.07 </td><td> 0.94 </td><td> 0.87 </td><td> 0.87 </td></tr><tr><td> 比較例2 </td><td> 2.33 </td><td> 2.28 </td><td> 2.08 </td><td> 1.82 </td><td> 1.62 </td><td> 1.32 </td><td> 0.99 </td><td> 0.70 </td><td> 0.73 </td></tr><tr><td> 實施例1 </td><td> 1.81 </td><td> 1.74 </td><td> 1.60 </td><td> 1.43 </td><td> 1.27 </td><td> 1.13 </td><td> 1.02 </td><td> 0.96 </td><td> 0.99 </td></tr><tr><td> 實施例2 </td><td> 1.88 </td><td> 1.81 </td><td> 1.63 </td><td> 1.46 </td><td> 1.29 </td><td> 1.14 </td><td> 1.03 </td><td> 0.97 </td><td> 1.00 </td></tr><tr><td> 實施例3 </td><td> 2.24 </td><td> 2.18 </td><td> 2.05 </td><td> 1.82 </td><td> 1.61 </td><td> 1.37 </td><td> 1.09 </td><td> 1.00 </td><td> 1.14 </td></tr></TBODY></TABLE>Gamma values measured in liquid crystal displays of embodiments 1 to 3 with light redirecting films disclosed in the present invention at different horizontal viewing angles, and comparisons 1 to 2 are not provided in accordance with the disclosure of the present invention The Gamma value measured by the light-redirecting film of the liquid crystal display at different horizontal viewing angles. The detailed measured Gamma value is shown in the following Table 3: Table 3: In different gamma (gamma value) measured by the horizontal angle of view at <TABLE border = "1" borderColor = "# 000000" width = "85%"><TBODY><tr><td> horizontal viewing </ td><td> 0 <sup> o </ sup></td><td> 10 <sup> o </ sup></td><td> 20 <sup> o </ sup></td><td> 30 <sup> o </ sup></td><td> 40 <sup> o </ sup></td><td> 50 <sup> o </ sup></td><td> 60 <sup> o </ sup></td><td> 70 <sup> o </ sup></td><td> 80 <sup> o </ sup></td></tr><tr><td> Comparative Example 1 </ td><td> 2.24 </ td><td> 2.03 </ td><td> 1.71 </ td><td> 1.44 </ td><td> 1.23 </ td ><td> 1.07 </ td><td> 0.94 </ td><td> 0.87 </ td><td> 0.87 </ td></tr><tr><td> Comparative Example 2 </ td><td> 2.33 </ td><td> 2.28 </ td><td> 2.08 </ td><td> 1.82 </ td><td> 1.62 </ td><td> 1.32 </ td><td> 0.99 </ td><td> 0.70 </ td><td> 0.73 </ td></tr><tr><td> Example 1 </ td><td> 1.81 </ td><td> 1.74 </ td><td> 1.60 </ td><td> 1.43 </ td><td> 1.27 </ td><td> 1.13 </ td><td> 1.02 </ td><td> 0.96 </ td><td> 0.99 </ td></tr><tr><td> Example 2 </ td><td> 1.88 </ td><td> 1.81 </ td ><td> 1.63 </ td><td> 1.46 </ td><td> 1.29 </ td><td> 1.14 </ td><td> 1.03 </ td><td> 0.97 </ td><td> 1.00 </ td></tr><tr><td> Example 3 </ td><td> 2.24 </ td><td> 2.18 </ td><td> 2.05 </ td><td> 1.82 </ td><td> 1.61 </ td><td> 1.37 </ td><td> 1.09 </ td><td> 1.00 </ td><td> 1.14 </ td></tr></TBODY></TABLE>

實施例1~3搭配根據本發明所揭示的光重導向膜的液晶顯示器在不同垂直視角下所量測到的伽馬值(Gamma value)，及比較例1~2未搭配根據本發明所揭示的光重導向膜的液晶顯示器在不同垂直視角下所量測到的伽馬值(Gamma value)，詳細量測到的伽馬值(Gamma value)如以下表四所示： 表四：在不同垂直視角下所量測到 的 伽馬 值 (Gamma value)<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 垂直視角 </td><td> 0^o</td><td> 10^o</td><td> 20^o</td><td> 30^o</td><td> 40^o</td><td> 50^o</td><td> 60^o</td><td> 70^o</td><td> 80^o</td></tr><tr><td> 比較例1 </td><td> 2.24 </td><td> 1.91 </td><td> 1.58 </td><td> 1.32 </td><td> 1.14 </td><td> 0.99 </td><td> 0.87 </td><td> 0.81 </td><td> 0.80 </td></tr><tr><td> 比較例2 </td><td> 2.00 </td><td> 1.81 </td><td> 1.52 </td><td> 1.25 </td><td> 0.96 </td><td> 0.70 </td><td> 0.48 </td><td> 0.34 </td><td> 0.25 </td></tr><tr><td> 實施例1 </td><td> 1.81 </td><td> 1.72 </td><td> 1.54 </td><td> 1.37 </td><td> 1.21 </td><td> 1.09 </td><td> 1.01 </td><td> 0.95 </td><td> 0.97 </td></tr><tr><td> 實施例2 </td><td> 1.88 </td><td> 1.77 </td><td> 1.57 </td><td> 1.38 </td><td> 1.23 </td><td> 1.12 </td><td> 1.03 </td><td> 0.96 </td><td> 0.96 </td></tr><tr><td> 實施例3 </td><td> 2.24 </td><td> 2.14 </td><td> 1.89 </td><td> 1.64 </td><td> 1.37 </td><td> 1.08 </td><td> 0.82 </td><td> 0.84 </td><td> 0.84 </td></tr></TBODY></TABLE>Gamma values measured in liquid crystal displays with light redirecting films according to the present invention according to embodiments 1 to 3 at different vertical viewing angles, and comparative examples 1 to 2 are not equipped with the disclosure according to the present invention The Gamma value measured by the light-redirecting film of the liquid crystal display at different vertical viewing angles, the detailed measured Gamma value is shown in Table 4 below: Table 4: In different gamma (gamma value) is measured at a vertical viewing angle to <TABLE border = "1" borderColor = "# 000000" width = "85%"><TBODY><tr><td> vertical viewing </ td><td> 0 <sup> o </ sup></td><td> 10 <sup> o </ sup></td><td> 20 <sup> o </ sup></td><td> 30 <sup> o </ sup></td><td> 40 <sup> o </ sup></td><td> 50 <sup> o </ sup></td><td> 60 <sup> o </ sup></td><td> 70 <sup> o </ sup></td><td> 80 <sup> o </ sup></td></tr><tr><td> Comparative Example 1 </ td><td> 2.24 </ td><td> 1.91 </ td><td> 1.58 </ td><td> 1.32 </ td><td> 1.14 </ td ><td> 0.99 </ td><td> 0.87 </ td><td> 0.81 </ td><td> 0.80 </ td></tr><tr><td> Comparative Example 2 </ td><td> 2.00 </ td><td> 1.81 </ td><td> 1.52 </ td><td> 1.25 </ td><td> 0.96 </ td><td> 0.70 </ td><td> 0.48 </ td><td> 0.34 </ td><td> 0.25 </ td></tr><tr><td> Example 1 </ td><td> 1.81 </ td><td> 1.72 </ td><td> 1.54 </ td><td> 1.37 </ td><td> 1.21 </ td><td> 1.09 </ td><td> 1.01 </ td><td> 0.95 </ td><td> 0.97 </ td></tr><tr><td> Example 2 </ td><td> 1.88 </ td><td> 1.77 </ td ><td> 1.57 </ td><td> 1.38 </ td><td> 1.23 </ td><td> 1.12 </ td><td> 1.03 </ td><td> 0.96 </ td><td> 0.96 </ td></tr><tr><td> Example 3 </ td><td> 2.24 </ td><td> 2.14 </ td><td> 1.89 </ td><td> 1.64 </ td><td> 1.37 </ td><td> 1.08 </ td><td> 0.82 </ td><td> 0.84 </ td><td> 0.84 </ td></tr></TBODY></TABLE>

根據實施例1-3及比較例1-2之量測結果，相對於液晶顯示器未使用本發明所揭示的光重導向膜的比較例1，實施例1、2的液晶顯示器因採用根據本發明所揭示的光重導向膜，故可在水平視角40°至80°之間提昇其對比及色彩飽和度，並且在垂直視角30°至80°之間提昇其對比及色彩飽和度。相對於液晶顯示器未使用本發明所揭示的光重導向膜的比較例2，實施例3的液晶顯示器因採用根據本發明所揭示的光重導向膜，故可在水平視角50°至80°之間提昇其對比及色彩飽和度，並且在垂直視角0°至80°之間提昇其對比及色彩飽和度。顯見本發明可確實提升液晶顯示器之顯示品質，並且適用於不同設計之顯示器。According to the measurement results of Examples 1-3 and Comparative Examples 1-2, compared with Comparative Example 1 in which the light redirecting film disclosed in the present invention is not used in the liquid crystal display, the liquid crystal displays in Examples 1 and 2 adopt the present invention. The disclosed light redirecting film can enhance its contrast and color saturation at a horizontal viewing angle of 40 ° to 80 °, and enhance its contrast and color saturation at a vertical viewing angle of 30 ° to 80 °. Compared with the liquid crystal display of Comparative Example 2 in which the light redirecting film disclosed in the present invention is not used, the liquid crystal display of Example 3 adopts the light redirecting film disclosed in the present invention, and thus can have a horizontal viewing angle of 50 ° to 80 °. Enhance its contrast and color saturation, and enhance its contrast and color saturation between 0 ° and 80 ° in vertical viewing angle. It is obvious that the present invention can indeed improve the display quality of the liquid crystal display, and is applicable to displays of different designs.

雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed as above by way of example, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and retouches without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the attached patent application.

10‧‧‧光重導向膜10‧‧‧light redirecting film

12‧‧‧第一層 12‧‧‧ first floor

14‧‧‧中間層 14‧‧‧ middle layer

14a‧‧‧第一光柵表面 14a‧‧‧First grating surface

18、19 偏光膜 18, 19 polarizing film

181、191‧‧‧第一保護層 181, 191‧‧‧ First protective layer

182、192‧‧‧偏光層 182, 192‧‧‧polarizing layer

183‧‧‧第二保護層 183‧‧‧Second protective layer

D1‧‧‧第一方向 D1‧‧‧ first direction

14b‧‧‧第二光柵表面 14b‧‧‧Second grating surface

141‧‧‧第一光柵 141‧‧‧The first grating

142‧‧‧第二光柵 142‧‧‧ Second grating

16‧‧‧第二層 16‧‧‧Second floor

D2‧‧‧第二方向 D2‧‧‧ Second direction

w1、w2‧‧‧寬度 w1, w2‧‧‧Width

d1、d2‧‧‧深度 d1, d2‧‧‧ depth

g1、g2‧‧‧間距 g1, g2‧‧‧ pitch

第1A圖所繪示的是根據本發明一較佳實施例所揭示的光重導向膜的立體透視圖。FIG. 1A is a perspective view of a light redirecting film according to a preferred embodiment of the present invention.

第1B圖所繪示的是如第1A圖所示的光重導向膜之中間層的第一光柵表面與第二光柵表面的立體透視圖。FIG. 1B is a perspective view of the first grating surface and the second grating surface of the intermediate layer of the light redirecting film shown in FIG. 1A.

第2A圖是沿如第1B圖所示之中間層上的第一光柵表面的D2方向所繪示的剖視圖。FIG. 2A is a cross-sectional view taken along the D2 direction of the first grating surface on the intermediate layer as shown in FIG. 1B.

第2B圖是沿如第1B圖所示之中間層上的第一光柵表面的D1方向所繪示的剖視圖。FIG. 2B is a cross-sectional view taken along the D1 direction of the first grating surface on the intermediate layer as shown in FIG. 1B.

第3A圖所繪示的是根據本發明之另一較佳實施例所揭示的光重導向膜的立體透視圖。FIG. 3A is a perspective view of a light redirecting film according to another preferred embodiment of the present invention.

第3B圖所繪示的是根據本發明之又一較佳實施例所揭示的光重導向膜的立體透視圖。FIG. 3B illustrates a perspective view of a light redirecting film according to another preferred embodiment of the present invention.