200837394 九、發明說明： 【發明所屬之技術領域】 本發明係有關聚光片，尤其是有關用以液晶顯示器（LCD, Liquid Crystal Display)之背光系統或其它需要的擴散聚 光片者。 【先前技術】 請參閱圖1所示。一般液晶顯示器之背光系統，包括冷陰 極燈管（CCFL)ll、導光板（LGP)12、下擴散片（Bott〇m diffuser)13、聚光片（Prism sheet)14、上擴散片（τ0ρ diffuser)15 及反射板(Reflector)16 所組成。 請參閱圖2所示。習知聚光片14係由複數個縱向平行排 列的三角形之棱鏡柱(Prism rod)141及基材(Substrate)142 所組成。稜鏡柱141結合於基材142的一側邊。每一菱鏡柱 141的高度、寬度相同，且稜鏡柱141的稜線高度不變，走向 為直線，稜線兩側的斜面相對稱。 請參閱圖3所示。聚光片14之光學路徑模式有三種： 1.全反射回收（TRI Recycle): 光線143由稜鏡柱141内約在垂直棱鏡柱141底面之虛擬 垂直軸140的±4°内射入時，受稜鏡斜面柱141的全反射現 象之影響，經兩次全反射後，回收至背後光源方向，繼續擴散 傳播利用； 2· —次折射回收（2 Reflection Recycle): 200837394 光線144經由兩組稜鏡柱141的折射後，再回收至背後 光源方向，繼續擴散傳播利用；及 3·直接折射(Directed Reflective): 光線145經由稜鏡柱141的斜面折射出，此光路模式有集 中光線之作用；如圖3中所示，由稜鏡柱141的視角8〇。範 圍内折射出的光線才有利用價值。 凊參閱圖4所示。上述具有複數縱向平行規律排列的棱鏡 柱141的聚光片U，當其上方疊置一上擴散片15或另一聚光 片等上層材料膜時，會產生如下問題： 1·谷易發生光色散的現象。 2·容易發生疊紋的現象。 3·聚光片14與上層的上擴散片15之間會有沾粘的問題。 4·聚光片14與上擴散片15沾粘的區域151，在大視角觀察時 有白斑的現象。 5·聚光片14於沾粘的區域151的峰(peak)直接與上擴散片 等上層材料膜接觸容易刮傷上層材料膜。 又聚光片14具有複數平行的棱鏡柱的一面較為光滑，若 有缺陷時，較容易被發現，而被認定為瑕疵品。 【發明内容】 為了使擴散聚光片具有新的結構，減少擴散聚光片與其他 材料膜相疊時容易發生沾粘、光色散及疊紋的現象，而提出本 6 200837394 發明。 的主要目的’在提供—種擴散聚^，可減少擴散 ㈣片與其他材料麟目疊時產生祕的問題。 本發明的另—目的，在提供—種擴散絲片，可減少擴散 聚光片與其他材料膜相疊時發生疊紋的現象。 本發明的另-目的，在提供一種擴散聚光片，可減少擴散 %光#與其他材料翻4時發生光色散的現象。 φ 本發明的又一目的，在提供一種擴散聚光片，可減少擴散 聚光片其他材料膜相疊時的沾粘區域，在大角度觀察時產生白 斑的現象。 本發明的又一目的，在提供一種擴散聚光片，可減少擴散 聚光片刮傷上層材料膜的下表面，有助於增加包含聚光片及上 層材料膜等之電子產品的製造良率。 本發明的其他目的、功效，請參閱圖式及實施例，詳細說 I 明如下。 【實施方式】 請參閱圖5、6所示。本發明擴散聚光片，係用以減少擴 散聚光片與其他材料膜相疊時發生沾粘、光色散及疊紋的現 象者。本發明第一實施例之擴散聚光片3〇，包括：一基材31， 可供光線穿射通過。基材31的一表面包含有複數縱向接近平 行排列的複數稜鏡柱32 ;複數稜鏡柱32分別具有峰 (Peak)321 〇 7 200837394 本實施例擴散聚光片30的特徵在於··複數稜鏡柱32的 峰321的頂部及/或兩側邊分別具有凹凸不平之粗糖部 322。如圖6所示，粗糙部322的寬度(a)佔稜鏡柱犯的底面 寬度（b)的〇· 1%至5%之間。 請參閱圖7所示。當本發明的聚光片3〇的上端疊置另一 材料膜40時，藉由複數棱鏡柱32的峰321及/或兩側邊分 別具有凹凸不平之粗縫部322的設計，可達成下述功效： • L细稜鏡柱32的峰321的頂部凹凸不平之粗糙部322接觸 材料膜40的下邊，可減少擴散聚光片30與其上端的材料膜 40的接觸面積，可有效減少與上層材料臈4〇之間的沾枯問 題。 2. 因為減少擴散聚光片3〇與其上端的材料膜4〇的接觸面積， 因此可有效減少沾枯的區域在大視角觀察時有白斑的現象。 3. 因為減J擴散聚光片3〇與其上端的材料膜的接觸面積， • 目此可有效減少擴散聚光片30與上層材料膜4〇因接觸而到 傷，有助於增加產品良率。 4·利用稜鏡柱32的峰321的粗糙部322擴散出之光線η混合 由稜鏡柱32射出的光線52，可有效減少光之色散現象。 5·利則夂鏡柱32的峰321的粗糙部322擴散出之光線51，可 霧化稜敝32的賊，齡攸發生的機會。 6· k鏡柱32,的峰321的粗輪部霧化棱鏡柱的條紋，當棱 鏡柱32光’月的面較若有缺陷時，較不容易被發現，而被認200837394 IX. Description of the Invention: [Technical Field] The present invention relates to a concentrating sheet, and more particularly to a backlight system for a liquid crystal display (LCD) or other desired diffusion concentrating sheet. [Prior Art] Please refer to Figure 1. A backlight system for a general liquid crystal display, including a cold cathode fluorescent lamp (CCFL) 11, a light guide plate (LGP) 12, a lower diffusion sheet (Bott〇m diffuser) 13, a prism sheet 14, and an upper diffusion sheet (τ0ρ diffuser) ) 15 and reflector (Reflector) 16 are composed. Please refer to Figure 2. The conventional concentrating sheet 14 is composed of a plurality of longitudinally parallel prism prisms 141 and a substrate 142. The mast 141 is bonded to one side of the substrate 142. Each of the prism columns 141 has the same height and width, and the height of the ridge line of the mast 141 is constant, and the direction is a straight line, and the slopes on both sides of the ridge line are symmetrical. Please refer to Figure 3. There are three optical path modes of the concentrating sheet 14: 1. TRI Recycle: When the ray 143 is incident within the column 141 within ±4° of the virtual vertical axis 140 of the bottom surface of the vertical prism column 141, Under the influence of the total reflection phenomenon of the bevel column 141, after two total reflections, it is recovered to the direction of the back light source, and the diffusion propagation is continued; 2·Refraction recovery (2 Reflection Recycle): 200837394 Light 144 passes through two sets of edges After the refraction of the mirror column 141, it is recycled to the direction of the back light source, and the diffusion propagation is continued; and 3. Directed Reflective: The light 145 is refracted through the inclined surface of the mast 141, and the optical path mode has the function of concentrating light; As shown in FIG. 3, the angle of view of the mast 141 is 8〇. The light reflected in the range is of value.凊 See Figure 4. When the concentrating sheet U having the plurality of longitudinally parallel-arranged prism columns 141 is superposed thereon with an upper diffusion film 15 or another concentrating sheet or the like, the following problems occur: 1. The valley is easy to generate light. The phenomenon of dispersion. 2. It is prone to the phenomenon of moiré. 3. There is a problem of sticking between the condensing sheet 14 and the upper upper diffusion sheet 15. 4. The region 151 where the condensing sheet 14 is adhered to the upper diffusion sheet 15 has a white spot when viewed from a large viewing angle. 5. The peak of the condensing sheet 14 in the adhered region 151 is directly in contact with the upper material film such as the upper diffusion sheet to easily scratch the upper material film. Further, the condensing sheet 14 has a plurality of parallel prism columns which are relatively smooth on one side, and are easily found if they are defective, and are considered as defective products. SUMMARY OF THE INVENTION In order to make the diffusion concentrating sheet have a new structure, it is easy to cause sticking, light dispersion and embossing when the diffusion concentrating sheet overlaps with other material films, and the invention is proposed. The main purpose of 'providing a kind of diffusion concentration ^ can reduce the problem of diffusion (4) sheets and other materials when they are stacked. Another object of the present invention is to provide a diffusing filament sheet which reduces the occurrence of moiré when the diffusing concentrating sheet overlaps with other material films. Another object of the present invention is to provide a diffusing concentrating sheet which can reduce the phenomenon of light dispersion occurring when the diffused % light # and other materials are turned over 4. φ Another object of the present invention is to provide a diffusing condensing sheet which can reduce the sticking area when the other films of the diffusing concentrating sheet are stacked, and the phenomenon of white spots when observed at a large angle. Still another object of the present invention is to provide a diffusion concentrating sheet which can reduce the lower surface of the diffusion concentrating sheet which scratches the upper material film, and contributes to increasing the manufacturing yield of the electronic product including the concentrating sheet and the upper material film. . For other purposes and functions of the present invention, please refer to the drawings and the embodiments, and the details are as follows. [Embodiment] Please refer to Figures 5 and 6. The diffusing concentrating sheet of the present invention is for reducing the occurrence of sticking, light dispersion and rubbing when the diffusing condensing sheet overlaps with other material films. The diffusing concentrating sheet 3 of the first embodiment of the present invention comprises: a substrate 31 for allowing light to pass therethrough. A surface of the substrate 31 includes a plurality of longitudinally adjacent parallel columns 32; the plurality of columns 32 respectively have a peak 321 〇7 200837394. The diffusion concentrating sheet 30 of the present embodiment is characterized by a complex rib. The top and/or both sides of the peak 321 of the mirror column 32 have uneven portions 322. As shown in Fig. 6, the width (a) of the rough portion 322 occupies between 1% and 5% of the width (b) of the bottom surface of the mast. Please refer to Figure 7. When the other material film 40 is stacked on the upper end of the concentrating sheet 3 of the present invention, the design of the ridge portion 321 and/or the both sides of the plurality of prism columns 32 each having the uneven portion 322 is obtained. Efficacy: • The top uneven portion 322 of the peak 321 of the L fine column 32 contacts the lower side of the material film 40, which can reduce the contact area between the diffusion concentrating sheet 30 and the material film 40 at the upper end thereof, and can effectively reduce the upper layer material. The problem of smearing between 臈4〇. 2. Since the contact area of the diffusion concentrating sheet 3 〇 with the material film 4 上 at the upper end thereof is reduced, it is possible to effectively reduce the phenomenon that the stained area has white spots when viewed from a large viewing angle. 3. Since the contact area of the J diffusion concentrating sheet 3 〇 with the material film at the upper end thereof is reduced, it is possible to effectively reduce the damage of the diffusion concentrating sheet 30 and the upper material film 4 〇 due to contact, which contributes to an increase in product yield. . 4. The light ray η diffused by the rough portion 322 of the peak 321 of the mast 32 mixes the light 52 emitted from the mast 32, thereby effectively reducing the dispersion of light. 5. The light ray 51 diffused from the rough portion 322 of the peak 321 of the mirror column 32 can atomize the thief of the rib 32, and the chance of occurrence of the cockroach. 6· k The mirror column 32, the coarse wheel portion of the peak 321 atomizes the stripe of the prism column, and when the surface of the prism column 32 is relatively defective, it is less likely to be found, and is recognized.
S 200837394 疋為瑕疲品，因此有助於增加生產良率。 請參閱圖8所示。本發明第二實施例的擴散聚光片6〇， 亦包含基材61及複數稜鏡柱62，複數稜鏡柱62的峰621及 /或其兩側邊分別具有凹凸不平之粗糙部622。稜鏡柱砭的 峰621頂呈圓弧狀，更可減少與上層材料膜4〇_因接觸而刮傷 的現象。 本發明使擴散聚光片稜鏡柱峰及/或其兩侧邊具有凹凸 不平之粗糖部，可有效減少擴散聚W與上層材_相疊時產 生的光色散現象，並可減少疊紋發生的機會；且可減少擴散聚 光片支樓於上層材料膜的下表面時產生的祕的問題，及減少 擴散聚光片及上層材料膜之間的沾粘區域，在大視角觀察時有 白斑的現象，亦減少峰刮傷上層材料膜的機會，有助於增加包 含擴散聚光片及上層材制等之f子產品的製造良率。本發明 各棱鏡柱的峰頂角為圓弧狀之設計，更能減少峰刮傷上層材料 膜的機會。 3 y 以上所錢’僅為利用本發明技術内容之實施例，任何熟 悉本項技藝者運用本發明所為之修飾、變化，韻本發明主張 之專利範圍，而不限於實施例所揭示者。 9 200837394 【圖式簡單說明】 圖1為已知顯示器的背光系統示意圖。 圖2為已知聚光片的示意圖。 圖3為已知聚光片的各種光線折射模式的示意圖。 圖4為已知聚光片支撐上層材料膜的示意圖。 圖5為本發明第一實施例的擴散聚光片的示意圖。 圖6為本發明第一實施例的擴散聚光片的剖面示意圖。S 200837394 is a sloppy product, so it helps to increase production yield. Please refer to Figure 8. The diffusing concentrating sheet 6 of the second embodiment of the present invention further includes a base material 61 and a plurality of struts 62, and the peaks 621 of the plurality of cymbals 62 and/or the both sides thereof have irregularities 622 which are uneven. The peak of the peak 621 of the 稜鏡 column is arc-shaped, which can reduce the scratching of the upper layer of the material film due to contact. The invention makes the diffusing condensing sheet 稜鏡 column peak and/or the two sides thereof have the rough and coarse sugar portion, which can effectively reduce the light dispersion phenomenon generated when the diffusion concentrating W and the upper layer _ overlap, and can reduce the occurrence of moiré. Opportunity; and can reduce the secret problem caused by diffusing the concentrating strip on the lower surface of the upper material film, and reducing the sticky area between the diffusing concentrating sheet and the upper material film, and having white spots when viewed from a large viewing angle The phenomenon also reduces the chance of the peak scratching the upper material film, and helps to increase the manufacturing yield of the sub-product including the diffusion concentrating sheet and the upper layer. The peak angle of each prism column of the present invention has an arc-shaped design, which can reduce the chance of the peak scratching the upper material film. 3 y 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 9 200837394 [Simple description of the drawings] Fig. 1 is a schematic diagram of a backlight system of a known display. 2 is a schematic view of a known concentrating sheet. Fig. 3 is a schematic illustration of various light refraction patterns of known concentrating sheets. Figure 4 is a schematic illustration of a known concentrating sheet supporting an upper material film. Fig. 5 is a schematic view showing a diffusion concentrating sheet according to a first embodiment of the present invention. Fig. 6 is a schematic cross-sectional view showing a diffusion concentrating sheet according to a first embodiment of the present invention.
圖7為本發明第一實施例的擴散聚光片支撐上層材料膜的示 意圖。 圖8為本發明第二實施例的擴散聚光片支撐上層材料膜的示 意圖。Fig. 7 is a view showing a diffusion concentrating sheet supporting an upper material film according to a first embodiment of the present invention. Fig. 8 is a view showing a diffusion concentrating sheet supporting an upper material film according to a second embodiment of the present invention.
【主要元件符號說明】 11冷極燈管 13下擴散片 140垂直軸 142基材 146稜鏡峰 31、61基材 321 、 621 峰 40材料膜 12導光板 14聚光片 141稜鏡柱 143、144、145 光線 30、60擴散聚光片 32、62棱鏡检 322、622粗糙部 51、52光線[Main component symbol description] 11 cold lamp tube 13 lower diffusion sheet 140 vertical axis 142 substrate 146 peak 31, 61 substrate 321 , 621 peak 40 material film 12 light guide plate 14 concentrating sheet 141 column 143, 144, 145 light 30, 60 diffusion concentrating sheet 32, 62 prism inspection 322, 622 roughness 51, 52 light