200841061 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種液晶顯示器（LCD)的背光單元之 導光面板’且更特別地係有關於一種具有非對稱前稜鏡且 可經由控制導光面板之前稜鏡的截面形狀調整在特定位置 之視角及亮度的LCD背光單元的導光面板。 _ 【先前技術】 通常，液晶顯示器（LCD)係指通過將電場施加至液晶， 其係在液體及固體之間的中間相材料，且其係被排列在做 為電極的二玻璃基板之間，以顯示數字或影像的裝置。 因為LCD裝置不是自發光裝置，其必須具有一背光單 元以做為發射光的光源。然後，影像等被顯示在液晶面板 上，其具有被排列成預疋圖案的液晶並且調整從背光單元 發射的光之透射率的數量。 _ 圖1係傳統LCD背光單元的爆炸透視圖。 根據發射光的光源之位置，液晶顯示器的背光單元】〇 可被分類成直下型背光單元，其中，光源係直接被置於LCD 面板100之後侧，及邊緣型背光單元，其中，光源係被置 於LCD面板100之側邊。圖i顯示一邊緣型背光單元1〇。 參閲圖卜傳統的LCD背光單元包括一光源1〇5、一導 光面板no、一反射板115、一擴散片120、稜鏡片125、 及一保護片130。 光源105用以在液晶顯示器中開始發出光。雖然不同 5142-9280-PF;Ahddub 5 200841061 類型的光源可被使用，不過，LCD通常採用冷陰極螢光燈 (CCFL)，其經歷非常低的功率消耗並且發射非常高亮度的 白光。 導光面板110被設置於在LCD面板100下面的光源105 之一側邊並且用以在將光源1〇5的聚光轉換成平面光之後 將光投射至導光面板的前面。 反射板115被設置在導光面板丨丨〇的後侧上並用以將 從光源1〇5發出的光反射向被放置在反射板前方的IXD面 板 10 0 〇 擴散片120被設置在導光面板11〇的上侧並用以提供 通過導光面板110的均勻光。 稜鏡片125用以經由折射及收集光，其傾向由於通過 擴散片120時在二方向（亦即水平及垂直方向）上的擴散快 速降低亮度，而改善亮度。 保護片130被配置在稜鏡片上，並用以保護稜鏡片125 眷丨於被到傷且當使用以水平及垂直方向被堆疊成二層的棱 鏡片125時防止莫瑞（M〇fre)現象的發生。 雖然未顯示於圖卜背光單元10更包括：一模框或外 殼，其用以固定背光單元10的各組件，使得背光單元ι〇 I成為整體的組件；及-背罩或燈罩，其用以在維持背光 單兀10的強度時保護及支撐背光單元1 〇。 圖2及3係導光面板11〇的擴大截面圖，繪示從光源 105發射並通過導光面板11〇的光之進展。 圖2所示，光源j 5通常被配置在接近背光單元1 〇 5142-9280-PF;Ahddub 6 200841061 的一邊緣（對於LCD TV，就在LCD面板的後面）。因此，從 光源105發射的光沒有均勻地透射通過背光單元的整個表 面’且背光單元的邊緣傾向比其他部分亮。導光面板u〇 被用以防止此種問題。導光面板丨丨〇通常係由透明的丙烯 酸樹脂製成，其確保導光面板的高強度。因此，導光面板 110不大可能破裂或變形並且具有輕的重量及高的透射率。 導光面板110用以導引從光源1 〇5發射的光以在導光 _ 面板的前面均勻地前進。不過，實際上，當光從靠近卸下 背光單元10的導光面板被配置之光源發射時，可觀察到導 光面板沒有展現均勻的亮度，且光被集中在導光面板的相 對^ 这疋因為導光面板110在相反的方向上引導來自光 源105的光。 因此，如圖3所示，在導光面板11 〇的後侧執行特別 的處理以從該處導致散射反射，使得整個導光面板均勻地 透射光。具體而言，各自具有考慮與光源1 Q 5的距離被設 φ 計的預定形狀之凸出及凹陷113被形成在後侧。以形成凸 出及凹陷113的此種圖案處理，可在LCD面板上獲得具有 較高亮度及均勻度的平面光。 LCD面板可取決於液晶的排列被分類成扭轉向列（TN) 型及同平面切換（IPS)型。TN型LCD提供比ipS型LCD差 的視角。不過，因為其具有優秀的透射率，TN型LCD適於 需要正面能見度的LCD。另一方面，雖然ips型LCD提供 比TN型LCD優良的視角’它具有較低的透射率，盆使得整 體的亮度變差。 5142-9280-PF;Ahddub 200841061 取決於操作環境、與液晶排列有關的LCD面板的種 類、及其他外部因素，通常需要改善在特定角度或在特 位置之LCD的亮度。 、 傳統上’反射式偏光增亮膜（DBEF)及非多層膜式反射 偏光增亮膜(贿）已被用以改善亮度或視角。不過，這些 膜導致背光單元的總厚度增加以及製造成本增加，從而降 低包含此種臈的LCD產品的競爭力。 TC〇 〇3中的凴度均勻性-視角依存性的項目控制相對 於-般的視覺顯示單元的水平及垂直視野之亮度均句性的 程度應該被管理以落在特定範圍内。ffi 4顯示對於—般的 視覺顯示單元的特徵評估之在财〇3標準中被定義的測 圖5及6顯示關於亮度均勾性_視角依存性的⑽，⑽ 標準、，其中’關於水平及垂直視野的亮度均勾性的程度係 分別被定義為L„及L”且被控制以具有17或更小。Tc〇，〇3200841061 IX. Description of the Invention: [Technical Field] The present invention relates to a light guide panel of a backlight unit of a liquid crystal display (LCD) and more particularly to an asymmetric front and can be controlled The cross-sectional shape of the front side of the light guide panel adjusts the light guide panel of the LCD backlight unit at a specific position and brightness. _ [Prior Art] Generally, a liquid crystal display (LCD) refers to an intermediate phase material which is applied between a liquid and a solid by applying an electric field to a liquid crystal, and is arranged between two glass substrates as electrodes. A device that displays numbers or images. Since the LCD device is not a self-illuminating device, it must have a backlight unit as a light source for emitting light. Then, an image or the like is displayed on the liquid crystal panel, which has liquid crystals arranged in a pre-turn pattern and adjusts the transmittance of light emitted from the backlight unit. _ Figure 1 is an exploded perspective view of a conventional LCD backlight unit. The backlight unit of the liquid crystal display can be classified into a direct type backlight unit according to the position of the light source that emits light, wherein the light source is directly placed on the rear side of the LCD panel 100, and the edge type backlight unit, wherein the light source is placed On the side of the LCD panel 100. Figure i shows an edge type backlight unit 1〇. Referring to the conventional LCD backlight unit, a light source 1〇5, a light guide panel no, a reflector 115, a diffusion sheet 120, a cymbal 125, and a protection sheet 130 are included. The light source 105 is used to start emitting light in the liquid crystal display. Although a light source of the type 5142-9280-PF; Ahddub 5 200841061 can be used, the LCD typically employs a cold cathode fluorescent lamp (CCFL) which experiences very low power consumption and emits very high brightness white light. The light guide panel 110 is disposed on one side of the light source 105 under the LCD panel 100 and serves to project light to the front of the light guide panel after converting the collected light of the light source 1〇5 into planar light. The reflecting plate 115 is disposed on the rear side of the light guiding panel 并 and is configured to reflect the light emitted from the light source 1〇5 to the LCD panel 10 that is placed in front of the reflecting plate. The diffusion sheet 120 is disposed on the light guiding panel. The upper side of the 11 并 is used to provide uniform light through the light guide panel 110. The ruthenium sheet 125 serves to refract and collect light, which tends to improve brightness by rapidly reducing the brightness in the two directions (i.e., horizontal and vertical directions) when passing through the diffusion sheet 120. The protective sheet 130 is disposed on the cymbal sheet and is used to protect the cymbal sheet 125 from being damaged and to prevent the M〇fre phenomenon when the prism sheet 125 stacked in two layers in the horizontal and vertical directions is used. occur. The backlight unit 10 is not shown in FIG. The backlight unit 1 is protected and supported while maintaining the intensity of the backlight unit 10. 2 and 3 are enlarged cross-sectional views of the light guide panel 11'', showing the progress of light emitted from the light source 105 and passing through the light guide panel 11. As shown in FIG. 2, the light source j 5 is usually disposed near an edge of the backlight unit 1 〇 5142-9280-PF; Ahddub 6 200841061 (for the LCD TV, just behind the LCD panel). Therefore, the light emitted from the light source 105 is not uniformly transmitted through the entire surface of the backlight unit' and the edge of the backlight unit tends to be brighter than the other portions. The light guide panel u〇 is used to prevent this problem. The light guide panel 丨丨〇 is usually made of a transparent acrylic resin, which ensures high strength of the light guide panel. Therefore, the light guide panel 110 is less likely to be broken or deformed and has a light weight and a high transmittance. The light guide panel 110 is for guiding the light emitted from the light source 1 〇 5 to uniformly advance in front of the light guide panel. However, actually, when light is emitted from a light source in which the light guide panel of the backlight unit 10 is removed, it is observed that the light guide panel does not exhibit uniform brightness, and the light is concentrated on the light guide panel. Because the light guide panel 110 directs light from the light source 105 in the opposite direction. Therefore, as shown in Fig. 3, special processing is performed on the rear side of the light guiding panel 11 以 to cause scattering reflection therefrom, so that the entire light guiding panel uniformly transmits light. Specifically, protrusions and depressions 113 each having a predetermined shape in consideration of the distance from the light source 1 Q 5 being set to φ are formed on the rear side. By such a patterning process of forming the projections and depressions 113, planar light having higher brightness and uniformity can be obtained on the LCD panel. The LCD panel can be classified into a twisted nematic (TN) type and an in-plane switching (IPS) type depending on the arrangement of the liquid crystals. The TN type LCD provides a lower viewing angle than the ipS type LCD. However, because of its excellent transmittance, the TN type LCD is suitable for LCDs that require frontal visibility. On the other hand, although the ips type LCD provides a superior viewing angle than the TN type LCD, which has a lower transmittance, the basin deteriorates the overall brightness. 5142-9280-PF; Ahddub 200841061 Depending on the operating environment, the type of LCD panel associated with the liquid crystal alignment, and other external factors, it is often necessary to improve the brightness of the LCD at a particular angle or at a particular location. Traditionally, 'reflective polarizing brightness enhancement film (DBEF) and non-multilayer film reflection polarizing brightness enhancement film (bribet) have been used to improve brightness or viewing angle. However, these films result in an increase in the total thickness of the backlight unit and an increase in manufacturing cost, thereby reducing the competitiveness of LCD products including such defects. The degree of uniformity in the TC 〇 - 3 - the project control of the viewing angle dependence should be managed to fall within a certain range with respect to the degree of brightness of the horizontal and vertical fields of view of the visual display unit. Ffi 4 shows that the characteristics of the general visual display unit are evaluated in the financial standard 3, and the pictures 5 and 6 show the brightness dependence (10), (10) standard, where 'about the level and The degree of brightness uniformity of the vertical field of view is defined as L „ and L ′′, respectively, and is controlled to have 17 or less. Tc〇,〇3
標準係在顯示器的視角_具有較大限制的TN帛液晶顯示 益(LCDs)的發展中的一項嚴重的障礙，且控制特定位置的 視角及LCDs的背光單元中的角度之組件或技術已被發展。 因此，需要不使用薄膜而改善LCD的亮度及視角的技 術0 【發明内容】 有鑑於上述問題 背光早元的導光面板 本發明之一目的在於提供一種lcd 其不僅可調整在特定位置的可視性 5142-9280-PF/Ahddub 8 200841061 及在特定角度的視角，也滿足TCO，03標準。 根據本發明之一特徵，LCD背光單元的導光面板包括 主體’具有用於接收入射光的一外侧、用於發射光的一 月ίι側、及一後側，其中，前侧係由具有三角截面的非對稱 的前稜鏡形成’其一傾斜側邊被處理以具有光滑鏡射表 面，且另一傾斜侧邊被處理以具有粗糙的擴散表面。 根據本發明之另一特徵，LCD背光單元的導光面板包 _ 括一主體，具有用於接收入射光的一外側、用於發射光的 一鈾側、及一後侧，其中，前側係由具有梯形截面的非對 稱的剷稜鏡形成，其一傾斜侧邊被處理以具有光滑鏡射表 面，且另一傾斜侧邊被處理以具有粗糙的擴散表面。 根據本發明，LCD背光單元的導光面板將對應於顯示 器的要求之視角的分佈最佳化，從而可有效地使用背光單 兀的光源。此外，根據本發明，經由消除被用於傳統導光 面板的DBEF及DRPF，導光面板可被形成以具有纖細的厚 φ 度及低製造成本，且特別滿足在TC0，03標準之下的光學 特徵’同時確保高亮度及良好的視角特徵。 【實施方式】 根據本發明之一特徵，LCD背光單元的導光面板包系 -主體’具有用於接收入射光的一外侧、用於發射光的一 丽側、及-後側’其中’前侧係由具有三角截面的非對系 的前稜鏡形成，前稜鏡的一傾斜侧邊被處理以具有光滑聋 射表面，且另-傾斜側邊被處理以具有粗糙的擴散表面: 5142-9280-PF;Ahddub 9 200841061 根據本發明之另一特徵，LCD背光單元的導光面板包 括一主體，具有用於接收入射光的一外侧、用於發射光的 一前側、及一後側，其中，前侧係由具有梯形截面的非對 稱的前稜鏡形成，前稜鏡的一傾斜侧邊被處理以具有光滑 鏡射表面，且另一傾斜側邊被處理以具有粗糙的擴散表面。 圖7係根據本發明之一實施例的LCD背光單元的導光 面板之立體圖。 籲 參閱圖7，本發明之一實施例的LCD背光單元的導光 面板30通常係由透明的丙烯酸材料製成，其具有高強度而 不易破裂或變形，且係重量輕，並展現可見光之高透射率。 導光面板30包括一主體3〇〇、非對稱的前稜鏡31〇、及後 稜鏡320。 主體3 0 0包括：一外侧3 〇 1，用於接收入射光；一前 侧303，其被連接至外侧3〇1並面對LCD面板（未顯示）； 及一後侧305，其被連接至外侧301並面對前侧3〇3。 鲁 名4 外侧3 01 ’詞彙上表示物體的一侧，但在此被 定義為一表面，從光源3〇6發射的光通過其進入導光面 板。在圖7中，外侧301表示鄰接光源306的二相對側邊。 預定形狀的後稜鏡320被形成在後側305上且具有垂 直於來自光源306的光之入射方向（Q方向）的一縱向方 向。也就是，當後稜鏡320被設置垂直於從光源3〇6發射 的光之入射方向（Q)時，它們可導致光之有效的繞射、折 射、及擴散。後稜鏡32〇的集合可構成一預定的點狀圖案 或條紋圖案。The standard is a serious obstacle in the development of display screens with larger limitations of TN帛 liquid crystal display (LCDs), and components or technologies that control the viewing angle at specific locations and the angles in the backlight unit of LCDs have been development of. Therefore, there is a need for a technique for improving the brightness and viewing angle of an LCD without using a film. [Invention] In view of the above problems, a light guide panel of a backlight element is provided in order to provide an LCD which can not only adjust the visibility at a specific position. 5142-9280-PF/Ahddub 8 200841061 and at a specific angle of view, also meet the TCO, 03 standard. According to a feature of the present invention, a light guide panel of an LCD backlight unit includes a main body 'having an outer side for receiving incident light, a month ίι side for emitting light, and a rear side, wherein the front side is provided with a triangle The asymmetrical front ridge formation of the section 'its one slanted side is treated to have a smooth mirrored surface and the other slanted side is treated to have a rough diffusing surface. According to another feature of the present invention, a light guide panel of an LCD backlight unit includes a main body having an outer side for receiving incident light, a uranium side for emitting light, and a rear side, wherein the front side is An asymmetric shovel having a trapezoidal cross-section is formed with one slanted side treated to have a smooth mirrored surface and the other slanted side treated to have a rough diffusing surface. According to the present invention, the light guiding panel of the LCD backlight unit optimizes the distribution of the viewing angle corresponding to the requirements of the display, so that the light source of the backlight unit can be effectively used. Further, according to the present invention, the light guide panel can be formed to have a slim thickness φ degree and a low manufacturing cost by eliminating the DBEF and the DRPF used for the conventional light guide panel, and particularly satisfy the optical under the TC0, 03 standard. Features 'at the same time ensure high brightness and good viewing angle characteristics. [Embodiment] According to one feature of the present invention, a light guide panel package-body of an LCD backlight unit has an outer side for receiving incident light, a side for emitting light, and a rear side 'of the front The side system is formed by a non-aligned front sill having a triangular cross section, one sloping side of the front sill is treated to have a smooth splayed surface, and the other sloping side is treated to have a rough diffusing surface: 5142- 9280-PF; Ahddub 9 200841061 According to another feature of the present invention, a light guide panel of an LCD backlight unit includes a body having an outer side for receiving incident light, a front side for emitting light, and a rear side, wherein The front side is formed by an asymmetrical front stern having a trapezoidal cross section, one slanted side of the front sill is treated to have a smooth mirrored surface, and the other slanted side is treated to have a rough diffusing surface. Figure 7 is a perspective view of a light guide panel of an LCD backlight unit in accordance with an embodiment of the present invention. Referring to FIG. 7, the light guide panel 30 of the LCD backlight unit of one embodiment of the present invention is generally made of a transparent acrylic material, which has high strength and is not easily broken or deformed, and is light in weight and exhibits high visible light. Transmittance. The light guide panel 30 includes a main body 3〇〇, an asymmetric front bezel 31〇, and a rear crucible 320. The main body 300 includes: an outer side 3 〇1 for receiving incident light; a front side 303 connected to the outer side 3〇1 and facing the LCD panel (not shown); and a rear side 305 connected To the outer side 301 and facing the front side 3〇3. Lu 4 4 The outer 3 01 ' vocabulary indicates one side of the object, but is defined herein as a surface through which light emitted from the light source 3〇6 enters the light guide panel. In Figure 7, the outer side 301 represents the opposite sides of the adjacent light source 306. A predetermined shape of the rear cymbal 320 is formed on the rear side 305 and has a longitudinal direction perpendicular to the incident direction (Q direction) of the light from the light source 306. That is, when the helium 320 is set perpendicular to the incident direction (Q) of the light emitted from the light source 3?6, they may cause effective diffraction, refracting, and diffusion of the light. The collection of the back 稜鏡 32 可 may constitute a predetermined dot pattern or a stripe pattern.
Sl42-928〇-PF;Ahddub 10 200841061 —y側303係由非對稱的前稜鏡3i〇形成，其具有一預 疋的戴面形狀並用以導致通過主體300發射的光之繞射、 折射、及擴散。 ;非對稱的前稜鏡310係在前侧編上以一定的間隔被 八有被叹置平行於從光源發射的光之入射方向的 縱向方向，亦即，在圖7中的Q方向。 不像傳統的前稜鏡，各非對稱的前稜鏡310具有一個 鲁傾斜側邊，被處理以具有粗縫的擴散表面3〇7，及另一傾 斜侧邊，被處理以具有光滑鏡射表® 308(雖然名詞，，鏡射 表面”通常表示一鏡面或光滑平面，非對稱的前稜鏡之，， 鏡射表面”在此指後者）。 鏡射表面308最好具有〇· m或更小力Ra值，其係 對應於％國；^準（KS)下的研磨處理之表面粗糙度，且擴散 表面307最好具有6· m或更大的以值，其係對應於在 KS下的一般處理之表面粗糙度。 Φ 在此實施例中，參考在KS下的表面粗糙度的規則，鏡 射表面308及擴散表面307係被建議以分別具有〇·2从 6. 3 /z m的Ra值。在此點上，在本發明之實驗測試中，當 鏡射表面308及擴散表面307均具有約〇·2/ζιη的Ra值時， TCO’ 03標準的Lh係約1. 9。再者，當擴散表面3〇7均具 有約5/zm的Ra值時，TCO，03標準的Lh係約1.7，且當 擴散表面307均具有約1〇从m的值時，TCO，03標準的 Lh係約1 · 4。也就是，在擴散表面307為約5 # m或更小的 Ra值的情況中，考慮到TCO’ 03標準的亮度均勻性—視角 5142-9280-PF;Ahddub 11 200841061 依存I*生，雖然導光面才反未展現顯著的&善效果，此導光面 板也滿足TC0 〇 3標準。不過，&了獲得進一步的改善效 果，最好擴散表φ 307具有盡可能低的Ra值。 圖8係根據本發明之實施例的lcd背光單元的導光面 板之侧視剖面圖。 參閱圖8 ’非對稱的前稜鏡310被設置在前侧上，使 得當前棱鏡310的鏡射表面3〇8面對導光面板的右及左側 且刖稜鏡310的擴散表面面對導光面板的中央。此排列被 λ计以通過增強侧邊可視性而改善視角特徵及滿足 TC0’ 03 標準。 換a之’非對稱的前稜鏡3丨〇之右及左傾斜侧邊具有 光學上不同的表面特徵，使得前稜鏡31〇的鏡射表面3〇8 可提供一般稜鏡的光學功能且擴散表面3〇7可提供擴散功 能以及一般稜鏡的光學功能。因此，當非對稱的前稜鏡31〇 在向面對導光面板30的LCD面板（未顯示）傾斜的方向上導 _ 致從主體300發射的光之繞射、折射及擴散時，非對稱的 前稜鏡310的結構可進一步改善到達LCD面板（未顯示）的 光之均勻性。 在圖8中，非對稱的前稜鏡31〇具有非對稱三角形的 垂直截面’且鏡射表面308被設置以在相反的方向上面對 導光面板30的右及左側。不過，此非對稱的前稜鏡3ι 〇的 結構係滿足在TCO’ 03標準下之最適合的觀看分佈 (viewing distribution)，且可被修改以具有被設置以面 對導光面板30的右及左侧之擴散表面307。 5142-9280-PF;Ahddub 12 200841061 圖9係根據太蘇BB a 灸 x月之另一實施例的LCD背光單元的導 光面板之侧視剖面圖。 相較於圖8的眘# ^ Λ ^ J只&例，圖9的鏡射表面308被設置以 面對導光面板的中本。 、 此一鏡射表面3 0 8的配置改善顯示 器的前側之可視性。施^ > , w任 換δ之，外側的可視性之改善或前側Sl42-928〇-PF; Ahddub 10 200841061—The y-side 303 is formed by an asymmetric front 稜鏡3i〇 having a pre-twisted wear shape and used to cause diffraction, refraction, and diffraction of light emitted through the body 300. And spread. The asymmetrical front sill 310 is longitudinally oriented at a certain interval by an occlusion parallel to the incident direction of light emitted from the light source at a certain interval, that is, in the Q direction in Fig. 7. Unlike conventional front sills, each asymmetric front sill 310 has a sloping side edge that is treated to have a diffused diffusing surface 3〇7, and another slanted side edge that is treated to have a smooth mirroring Table® 308 (although noun, mirrored surface) generally means a mirrored or smooth plane, an asymmetrical front, and a mirrored surface "here refers to the latter". The mirror surface 308 preferably has a value of 〇·m or less, which corresponds to the surface roughness of the grinding treatment under %, and the diffusion surface 307 preferably has 6·m or more. A large value, which corresponds to the surface roughness of the general treatment under KS. Φ In this embodiment, referring to the rule of surface roughness under KS, the mirror surface 308 and the diffusion surface 307 are suggested to have Ra values of 6.·2 from 6. 3 /z m , respectively. In this case, in the experimental test of the present invention, when the mirror surface 308 and the diffusion surface 307 each have an Ra value of about 〇·2/ζιη, the Th of the TCO' 03 standard is about 1.9. Furthermore, when the diffusion surfaces 3〇7 each have an Ra value of about 5/zm, the TCO, 03 standard Lh is about 1.7, and when the diffusion surface 307 has a value of about 1 〇 from m, the TCO, 03 standard The Lh is about 1/4. That is, in the case where the diffusion surface 307 is an Ra value of about 5 #m or less, the brightness uniformity of the TCO' 03 standard is considered - the viewing angle 5142-9280-PF; Ahddub 11 200841061 depends on the I*, although The glossy surface does not exhibit significant & good effects, and the light guide panel also meets the TC0 〇3 standard. However, & for further improvement, it is preferred that the diffusion table φ 307 has the lowest possible Ra value. Figure 8 is a side cross-sectional view of a light guiding panel of an LCD backlight unit in accordance with an embodiment of the present invention. Referring to FIG. 8 'the asymmetric front cymbal 310 is disposed on the front side such that the mirror surface 3 〇 8 of the current prism 310 faces the right and left sides of the light guide panel and the diffusion surface of the 刖稜鏡 310 faces the light guide The center of the panel. This arrangement is λ-measured to improve viewing angle characteristics and to meet the TC0' 03 standard by enhancing side visibility. The right and left slanting sides of the 'asymmetrical front 稜鏡3 具有 have optically different surface features, so that the mirrored surface 3〇8 of the front 稜鏡31〇 provides general optical function and The diffusing surface 3〇7 provides a diffusing function as well as a general optical function of the crucible. Therefore, when the asymmetric front pupil 31 is guided in a direction inclined to the LCD panel (not shown) facing the light guiding panel 30, the diffraction, refraction, and diffusion of light emitted from the main body 300 are asymmetric. The structure of the front cymbal 310 further improves the uniformity of light reaching the LCD panel (not shown). In Fig. 8, the asymmetric front 稜鏡 31 〇 has a vertical cross section of an asymmetrical triangle and the mirror surface 308 is disposed to oppose the right and left sides of the light guide panel 30 in opposite directions. However, this asymmetric front 稜鏡3 〇 structure satisfies the most suitable viewing distribution under the TCO' 03 standard and can be modified to have the right side disposed to face the light guide panel 30 and Diffusion surface 307 on the left side. 5142-9280-PF; Ahddub 12 200841061 Fig. 9 is a side cross-sectional view of a light guide panel of an LCD backlight unit according to another embodiment of Taisu BB a moxibustion. The mirrored surface 308 of Fig. 9 is disposed to face the center of the light guide panel as compared to the caution #^ Λ ^J only & The configuration of this mirrored surface 308 improves the visibility of the front side of the display. Apply ^ > , w to change δ, the improvement of the visibility of the outside or the front side
的可視性之改蓋可炮rU I ° 、、、由取決於顯示器的種類排列如圖8或 圖9所示的鏡射表面被選擇。The visibility of the cover can be selected by the mirror surface shown in Fig. 8 or Fig. 9 depending on the type of display.
圖1 〇係根據本發明之再一實施例的LCD背光單元的導 光面板之侧視剖面圖。 多閱圖10 ’分離空間在稜鏡間被定義以形成分離面 315,光可由其被導向垂直於LCD面板（未顯示）以進一步改 善到達LCD單元（未顯示）的光之均勻性。 如上所述，非對稱的前稜鏡31〇的垂直截面在圖7至 1〇的實施例中具有非對稱三角形。不it，應注意本發明並 非限定於此結構。例如，非對稱的前稜鏡31〇的垂直截面 可具有梯形，或是在各侧邊具有一尖頭頂點及預定的曲率 半徑的倒槽形。 圖11至14係非對稱的前稜鏡之不同例子的剖面圖。 參閱圖11及12，非對稱的前稜鏡31〇具有三角形， 及在40〜140度的範圍中之稜鏡角（01+02)。在圖u的非 對稱刖稜鏡中，0 1及0 2係不同值，且對於圖〗2的非對 稱鈾棱鏡’ θ 1及0 2係相同的值。 參閱圖13及14,非對稱的前稜鏡31〇具有梯形，及 在20〜70度的範圍中之稜鏡角1+0 2)。在圖·13的非對 5142-9280-PF;Ahddub 13 200841061 稱前稜鏡中， 前稜鏡，Θ1 如上所述 1及Θ 2係不同值’且對於圖14的非對稱 及0 2係相同的值。 狀。 非對稱的前稜鏡31〇 τ被修改為不同的形 換言之’當非對稱的前稜鏡31()具有圖13及Μ所示 的梯形時，彼此平行的短邊對長邊的比率最好係〇·5或更 小。若梯形的短邊對長邊的比率大，則整個形狀的 平坦表面的面積比率變得過度地增加，而導致亮度劣化。 【圖式簡單說明】 圖1係一傳統LCD背光單元的爆炸透視圖； 圖2及3係導光面板的擴大截面圖，緣示從光源發射 並通過導光面板的光之進展； 圖4顯示對於一般的視覺顯示單元的特徵評估之在 TC0 標準中被定義的測定位置； _ 圖5及6顯示關於亮度均勻性-視角依存性的TC0，03 標準； 圖7係根據本發明之一實施例的LCD背光單元的導光 面板之透視圖； 圖8係根據本發明之實施例的[CD背光單元的導光面 板之側視剖面圖； 圖9係根據本發明之另一實施例的LCD背光單元的導 光面板之侧視剖面圖； 圖1 0係根據本發明之再一實施例的LCD背光單元的導 5142-9280-PF;Ahddub 14 200841061 光面板之侧視剖面圖； 圖11至14係非對稱的前稜鏡之不同例子的剖面圖。 【主要元件符號說明】 3 0〜導光面板； 301〜外側； 305〜後側； 3 0 7 ·擴散表面， 300〜主體； 3 0 3〜前側； 306〜光源； 308〜鏡射表面； 310〜非對稱的前稜鏡； 315〜分離面； 320〜後棱鏡。 5142-9280-PF;Ahddub 15BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side cross-sectional view showing a light guide panel of an LCD backlight unit according to still another embodiment of the present invention. The multi-view 10' separation space is defined between turns to form a separation surface 315 from which light can be directed perpendicular to the LCD panel (not shown) to further improve the uniformity of light reaching the LCD unit (not shown). As described above, the vertical cross section of the asymmetric front 稜鏡 31 具有 has an asymmetrical triangle in the embodiment of Figs. 7 to 1〇. It should be noted that the present invention is not limited to this structure. For example, the vertical section of the asymmetric front 稜鏡 31〇 may have a trapezoidal shape or an inverted groove shape having a pointed apex and a predetermined radius of curvature on each side. Figures 11 through 14 are cross-sectional views of different examples of asymmetric front ridges. Referring to Figures 11 and 12, the asymmetric front 稜鏡 31 〇 has a triangular shape and a corner angle (01 + 02) in the range of 40 to 140 degrees. In the asymmetric enthalpy of Fig. u, 0 1 and 0 2 are different values, and the asymmetrical uranium prisms ' θ 1 and 0 2 of Fig. 2 are the same value. Referring to Figures 13 and 14, the asymmetric front cymbal 31 has a trapezoidal shape and a corner 1+0 2 in the range of 20 to 70 degrees. In Fig. 13, the pair of 5142-9280-PF; Ahddub 13 200841061 is called the front 稜鏡, 稜鏡1, 1 and Θ 2 are different values as described above and are the same for the asymmetry and the 0 2 system of Fig. 14 Value. shape. The asymmetrical front 稜鏡31〇τ is modified to a different shape. In other words, when the asymmetric front 稜鏡31() has the trapezoids shown in Fig. 13 and Μ, the ratio of the short side to the long side parallel to each other is the best. System 〇 5 or less. If the ratio of the short side to the long side of the trapezoid is large, the area ratio of the flat surface of the entire shape becomes excessively increased, resulting in deterioration of luminance. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a conventional LCD backlight unit; FIGS. 2 and 3 are enlarged cross-sectional views of the light guide panel, showing the progress of light emitted from the light source and passing through the light guide panel; The measurement position defined in the TC0 standard for the feature evaluation of a general visual display unit; _ Figures 5 and 6 show the TC0,03 standard for luminance uniformity-viewing dependence; FIG. 7 is an embodiment according to the present invention. FIG. 8 is a side cross-sectional view of a light guide panel of a CD backlight unit according to an embodiment of the present invention; FIG. 9 is an LCD backlight according to another embodiment of the present invention. 1 is a side cross-sectional view of a light guide panel of a unit according to still another embodiment of the present invention; FIG. 10 is a side cross-sectional view of a light panel of an LCD backlight unit according to still another embodiment of the present invention; FIG. A cross-sectional view of a different example of an asymmetric front sill. [Main component symbol description] 3 0 ~ light guide panel; 301 ~ outer side; 305 ~ rear side; 3 0 7 · diffusion surface, 300 ~ body; 3 0 3 ~ front side; 306 ~ light source; 308 ~ mirror surface; ~ Asymmetric front 稜鏡; 315 ~ separation surface; 320 ~ rear prism. 5142-9280-PF; Ahddub 15