1352861 * 99年12月15日修正替換頁 九、發明說明： 一·〜 【發明所屬之技術領域】 本發明係關於一種液晶顯示裝置之背光模組，尤指一種背光 模組之反射片具有散射區的液晶顯示裝置。 【先前技術】 一般而言’在液晶顯示裝置（liquid crystal display，LCD)中， 背光模組（back light module)係設置於液晶顯示面板的下方，並 藉由光源與各種光學組件(如擴散板（diffUser)、稜鏡片（prism sheet)等)的組合，以提供液晶顯示面板高亮度且均勻之光源，然 後再精由控制液晶顯示面板上的透明像素電極（pixel elec^〇de)， 調整液晶分子旋轉角度以產生不同的光通量，再穿透彩色濾光片 (colorfilter)，以形成適當的色彩，進而構成液晶顯示器使用者所 觀賞之亮麗影像。 液晶顯示裝置依照光源方向又概略分為與直下式（出尺以 lighting type)和側光式（edge lightingtype)兩大類，其中，利用 側光式光源的背光模組架構必簡由導光板〇咖㈣^喊， LGP)導引光線方向，以提高液晶顯示面板輝度及㈣亮度均勾。 但因為傳統導光板僅能導⑽部分的光源光線，造成面板輝度 (lumin麵）不；^，所以目前f界研糾v型溝槽導光板(v⑽ light guide p】ate)取代傳統網點導光板。 5 1352861 99年12月15日修正替換頁 請參考第1圖，第1圖係為習知技術中使用V型溝槽導光板 的背光模组結構示意圖。背光模組1〇包含有光源12、反射片 (reflector) 14 ' V型溝槽導光板16、稜鏡片18、擴散片19，其 中光源12係為冷陰極螢光燈管（c〇id cathode fluorescent lamp, CCFL)的側光式光源’v型清槽導光板係為模型（wedge-shaped) 導光板，又稜鏡片18之刻槽圖案係面向導光板，且v型溝槽導光 板16和棱鏡片18之稜鏡方向相互垂直，因為v型溝槽導光板16 具有聚集光線的效果’所以可以增加液晶顯示面板的輝度達3〇% 以上。 但是，因為光源產生的光線進入V型溝槽導光板後，會因為 楔型的V型溝槽導光板本身的斜率和其上擴散點圖案等問題，造 成光線不同的折射效果’使得出光的角度和位置受到影塑，進而 使得液晶顯示面板靠近燈管附近產生多條亮帶、暗帶交錯的燈管 側亮暗帶，如第2圖所示。第2圖係為習知技術中燈管側亮、暗 帶位置之俯視示意圖。由俯視的角度觀察液晶顯示器2〇，可發現 液晶顯示器20之液晶顯示器面板24上出現多條亮帶、暗帶交錯 的燈管側亮暗帶26在燈管22旁，嚴重影響了液晶顯示器面板％ 的品質。 一習知技術有提到改善燈管側亮暗帶的技術，其係利用在反 射片靠近導光板的一側貼上黑色吸光或遮光膠帶，以減少光線直 6 13528611352861 *December 15th, 1999, the replacement page IX, the invention description: 1. The invention relates to a backlight module of a liquid crystal display device, in particular, a reflection sheet of a backlight module has scattering The liquid crystal display device of the area. [Prior Art] Generally, in a liquid crystal display (LCD), a backlight module is disposed under the liquid crystal display panel, and is configured by a light source and various optical components (such as a diffusion plate). a combination of (diffUser), a prism sheet, etc., to provide a high-brightness and uniform light source of the liquid crystal display panel, and then to control the transparent pixel electrode (pixel elec^〇de) on the liquid crystal display panel to adjust the liquid crystal The molecular rotation angle is used to generate different luminous fluxes, and then pass through a color filter to form an appropriate color, thereby constituting a bright image viewed by a liquid crystal display user. The liquid crystal display device is roughly classified into a direct type (lighting type) and an edge lighting type according to the direction of the light source. The backlight module structure using the side light source must be simply controlled by the light guide plate. (4) ^ shout, LGP) guide the light direction to improve the brightness of the liquid crystal display panel and (4) the brightness is hooked. However, because the traditional light guide plate can only guide the light source of the (10) part of the light, the panel luminance (lumine surface) is not; ^, so the current f-direction research and correction v-type grooved light guide plate (v (10) light guide p]ate) replaces the traditional dot light guide plate . 5 1352861 Revised replacement page on December 15, 1999 Please refer to Fig. 1, which is a schematic structural view of a backlight module using a V-shaped grooved light guide plate in the prior art. The backlight module 1 includes a light source 12, a reflector 14' V-shaped grooved light guide plate 16, a cymbal 18, and a diffusion sheet 19, wherein the light source 12 is a cold cathode fluorescent tube (c〇id cathode fluorescent tube) Lamp, CCFL) side light source 'v type clear groove light guide plate is a model (wedge-shaped) light guide plate, and the groove pattern of the cymbal 18 is a guide light plate, and the v-shaped groove light guide plate 16 and the prism The ridges of the sheets 18 are perpendicular to each other, and since the v-type grooved light guide plate 16 has the effect of collecting light, the luminance of the liquid crystal display panel can be increased by more than 3%. However, since the light generated by the light source enters the V-shaped groove light guide plate, the refraction effect of the light is caused by the slope of the wedge-shaped V-shaped groove light guide plate itself and the pattern of the diffusion dot pattern thereon. And the position is shadowed, so that the liquid crystal display panel is close to the vicinity of the lamp tube, and a plurality of bright bands and dark bands are interlaced on the side of the lamp tube, as shown in FIG. 2 . Fig. 2 is a top plan view showing the position of the bright side of the lamp and the position of the dark band in the prior art. Looking at the liquid crystal display 2 from a top view, it can be found that a plurality of bright bands appear on the liquid crystal display panel 24 of the liquid crystal display 20, and the light-band side dark band 26 of the dark-band interlaced is adjacent to the lamp tube 22, which seriously affects the liquid crystal display panel. % quality. A conventional technique has been mentioned in the technique of improving the bright and dark band on the side of the lamp tube, which uses a black light absorbing or shading tape on the side of the reflector near the light guide plate to reduce the light straightness 6 1352861
接反射，進而避免燈管側亮暗帶的發生。__ ^ 又另二^技術係在背 先枳組之反射片上設置均勻的凹凸部分以 刀μ改善光源光線的利用率 和均句度的技術’在此技術巾凹凸部分％分佈在整個反射片 上’目的纽善整舰晶齡面板喊_皱，但仍卻無法改 善燈管側亮、暗帶的問題。 【發明内容】 本發明係提供-魏晶齡裝置之料聽，啸決上述燈 管侧亮暗帶之問題。 本發明之最佳實關巾，係提供―種祕液晶顯示器之侧光 式背光模組’包含有導光板’設於導光板—_絲，位於導光 板上表面的光學膜片，以及，位於導光板下表面的反射片，且反 射片罪近光源處具有散射區，而散射區外的反射片表面則為反射 平面。 因為本發明在反射片之散射區加上了數個不均勻凹凸面圖 案，所以當光源光線經由反射片進入ν型溝槽導光板時，經由反 射片政射Q反射出去的光線之折射方向會改變，使得光線由全反 射變成散射，所以光線由液晶顯示面板出光時，不會形成數條亮 線、暗線交錯的情況，避免了燈管側亮暗線的形成，有效解決習 知技術之燈管側亮暗線的問題。 7 1352861 99年12月15日修正替換頁 【實施方式】 --一~~ ~- 請參考第3圖’第3圖係為本發明之背光模組結構示意圖。 背光模組30包含有光源32、反射月34、V型溝槽導光板36、稜 鏡片38、擴散片39,其中反射片34靠近光源32的地方又包含有 散射區35，而散射區35外之反射片34表面則為一反射平面37 ^ 在此較佳實施例中，背光模組30係應用於一液晶顯示裝置中，尤 其適用於一筆記型電腦、手機、平面電視等薄膜電晶體液晶顯示 裝置之側光式背光模組》 如第3圖所示，光源32是一個側光式光源，其可為冷陰極螢 光燈管(CCFL)、外部電極螢光燈管(EEFL)或者發光二極體（LED) 等光源，V型溝槽導光板36係為楔型導光板，且稜鏡片％之稜 鏡係面向導光板，又V型溝槽導光板36和稜鏡片38之稜鏡方向 相互垂直，如此，光源32之光線便可經由反射片34反射進入v 型溝槽導光板36中，再經過V型溝槽導光板36和稜鏡片38聚集 光線後’光線即可經由擴散片39射出，而擴散片39可使得射出 的光線更均勻。此外，又因為本發明之反射片34的散射區35係 為一粗糙面，微觀來看，散射區35更具有多數個不均勻凹凸面圖 案（未顯示），這些圖案可以為圓形、橢圓形以及不規則形狀，所 以當光源32光線經由反射片34進入V型溝槽導光板％時這些 經由反射片34散射區反射出去的光線之折射方向會改變，使得光 線由全反射變成散射’所以光線由液晶顯示面板出光時，便不會 形成數條亮線、暗線交錯的情況，進而可有效減輕燈管側亮暗二 1352861 99年12月15曰修正替換頁 的形成。所以，散射區35不需佈滿整個反射片要在反一^ 射片34靠近光源32的地方設置即可達到功效。 。月參考第4圖，第4圖係為本發明之散射區位置之俯視示意 圖第4圖係延續第3圖之條件，但是由俯視的角度觀看背光模 組30 ’其中反射片34靠近光源32之處具有散射區35。以現行筆. 記型電腦之_硫、燈管、燈管反射科大小作為考量時，散 射區35的寬度範圍由反射片34靠光源的端面算起可不大於3公 分’較佳為大於〇餐米且小於1〇釐米，而散射區％中又具有數 個不均勻凹凸面圖案42,這些不均勻凹凸面圖案42可以改變光源 32光線的折射和繞财向’使得照射至散舰35的部分光線由全 反射變成散射，進岐變反射光的狀和位置，所料線由背光 模組30出光時，不會顯現出明顯的亮帶、暗帶，有效減輕燈管側 党暗線。 矛咅5圖’第5圖係為本發明之不均如凸面圖案結構 -一因為不均勻凹凸面圖案42係為一圓球形切槽，所以不 勻凹凸面圖案42由側面來看就是―個圓弧狀的 = 晶顯示器之背光膜組大小來考量時，不均句凹凸面圖幸：：液 :圍大小可為3〇毫米um)至⑽毫米，而圓球形案二; 的深度則可為5毫米（㈣至如毫米。 凹槽最冰處 值得-提的是，不均勾凹凸面圖案42可藉由網點印刷、嘴砂、 _、航處理和模域料方式軸，其 利用水或者高㈣氣將雜（未顯示 ^之散射區35產生不均勻凹凸面圖案42， = ^是利用金屬材質 式讓 _ :::::==^ 模且壓m m 面圖案42。此外，利用喷砂和 呈規二均勻凹凸面圖案42不只是在散射區％ 呈現-種不均勻的分佈，每個不網凹凸關案4 不同的尺寸，呈現-種不規則的分佈。 ，、有 不句勻凹凸面圖案犯疏密度的分佈情況，則必須考量各家 背光廠所生產的V型溝㈣光板之V型溝觸距、肢和深度等 問，，經由電職擬實際辭側亮、暗帶可能發生的情況，回推 打出4配何種疏密度的不均句凹凸面圖案42,並依照此電腦 演异結果作為製作科勻„面_ 42時的設計圖。請參考第 ϋ圖第6、7圖係為本翻之不如凹凸_案疏密度示意圖。 弟6圖係為較疏鬆的不均句凹凸面圖案42排列在反射片％上情 況’而第7圖則顯現錄密的不均勻凹凸面圖案π排列在反射片 34上情況，而實際製作具_免燈相亮、暗帶功能的不均句凹 凸面圖案42時’其疏密朗分佈情㈣健上述電職算結果來 f，第6、7圖僅是不同不均句凹凸面圖案42疏密度的參考範 本，並非實際上電腦模擬演算後的結果。 Ι3·52861 QJ-r-6, U u 99年】2月15日修正替換頁 因為本發明在反射片之政射區加上了數個 案，所以當光源光線經由反射片進入ν型溝槽導光板時，經由反 射片散射區反射出去的光線之折射方向會改變，使得光線由全反 射變成散射’所以光線由液晶顯示面板出糾，不會形成數^ 線、暗線交錯的情況，避免燈管側亮暗線的形成，^效解決習: 技術之燈管側亮暗線的問題。本發明不似前述之習知技術是利用 遮光膠帶減少光線反射’而是利用不均勻凹凸面圖案。又本發明 也不同於前述之另-習知技術是設置均勻的凹凸部分在整個^面 反射片上’本發明僅有反射片之散射區有多數個不均勻凹凸面圖 案，且品配合電腦模擬結果，而進行凹凸面設計。 · 以上所述僅為本發明之較佳實_，凡依本發明申請專利範 圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 【圖式簡單說明】 第1圖係為習知技術中使用ν型溝槽4光板的背光模組結構示意 圖。 ' 第2圖係為習知技術巾燈管侧亮暗帶位置之俯視示意圖。 第3圖係為本發明之背光模組結構示意圖。 第4圖係為本發明之散射區位置之俯視示意圖。 第5圖係為本發明之不均勻凹凸面圖案結構示意圖。 第6、7圖係為本發明之不均勻凹凸面圖案疏密度示意圖。 11 1352861 【主要元件符號說明】 99年12月15日修正替換頁 10、30 背光模組 12、32 光源 14、34 反射片 16、36 V型溝槽導光板 18、38 棱鏡片 19、39 擴散片 20 液晶顯不斋 22 燈管 24 液晶顯不斋面板 26 燈管側亮暗帶 35 散射區 37 反射平面 42 凹凸面圖案 12Connect the reflection to avoid the occurrence of bright and dark bands on the side of the lamp. __ ^ The other two technology is the technique of setting the uniform concave and convex part on the reflection sheet of the back 枳 group to improve the utilization of the light source and the uniformity of the light by the knife μ. Here, the uneven portion of the technical towel is distributed over the entire reflection sheet. The purpose of the New Zealand whole ship crystal age panel shouts _ wrinkles, but still can not improve the problem of bright and dark bands on the side of the lamp. SUMMARY OF THE INVENTION The present invention provides a problem in which the Wei Jingling device listens and stuns the bright and dark bands on the side of the lamp. The best-acting cleaning towel of the present invention provides an edge-lit backlight module of a kind of liquid crystal display, which comprises a light guide plate disposed on the light guide plate--wire, an optical film located on the surface of the light guide plate, and located at The reflection sheet on the lower surface of the light guide plate, and the reflection sheet has a scattering area near the light source, and the surface of the reflection sheet outside the scattering area is a reflection plane. Because the present invention adds a plurality of uneven concave and convex surface patterns in the scattering region of the reflective sheet, when the light source light enters the ν-type grooved light guide plate through the reflective sheet, the refracting direction of the light reflected by the reflective sheet political beam Q will The light is changed from total reflection to scattering. Therefore, when the light is emitted from the liquid crystal display panel, a plurality of bright lines and dark lines are not formed, and the formation of bright and dark lines on the side of the tube is avoided, and the light tube of the prior art is effectively solved. Side bright dark line problem. 7 1352861 Revised replacement page on December 15, 1999 [Embodiment] -1~~~- Please refer to Figure 3'. Figure 3 is a schematic diagram of the structure of the backlight module of the present invention. The backlight module 30 includes a light source 32, a reflective moon 34, a V-shaped groove light guide plate 36, a cymbal plate 38, and a diffusion sheet 39. The reflective sheet 34 further includes a scattering region 35 near the light source 32, and the scattering region 35 is outside. The surface of the reflective sheet 34 is a reflective plane 37. In the preferred embodiment, the backlight module 30 is applied to a liquid crystal display device, and is particularly suitable for a thin film transistor liquid crystal such as a notebook computer, a mobile phone, or a flat television. Side-lighting backlight module of display device As shown in FIG. 3, the light source 32 is an edge-light source, which can be a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent tube (EEFL) or a light source. A light source such as a diode (LED), the V-shaped groove light guide plate 36 is a wedge type light guide plate, and the 稜鏡 稜鏡 稜鏡 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 向导 V The directions are perpendicular to each other. Thus, the light of the light source 32 can be reflected into the v-shaped grooved light guide plate 36 via the reflection sheet 34, and then the light is collected by the V-shaped grooved light guide plate 36 and the cymbal sheet 38. 39 is emitted, and the diffuser 39 allows the emitted light to be more uniform. In addition, since the scattering region 35 of the reflection sheet 34 of the present invention is a rough surface, the scattering region 35 has a plurality of uneven uneven surface patterns (not shown), which may be circular or elliptical. And the irregular shape, so when the light of the light source 32 enters the V-shaped groove light guide plate via the reflection sheet 34, the refraction direction of the light reflected by the scattering region of the reflection sheet 34 changes, so that the light changes from total reflection to scattering 'so light When the liquid crystal display panel emits light, a plurality of bright lines and dark lines are not formed, and the formation of the corrected replacement page of the light-dark side of the lamp 1352286 is reduced. Therefore, the scattering region 35 does not need to be covered with the entire reflective sheet to be disposed at a position where the anti-reflecting sheet 34 is close to the light source 32. . Referring to FIG. 4, FIG. 4 is a top plan view of the position of the scattering region of the present invention. FIG. 4 is a condition continuing from FIG. 3, but the backlight module 30' is viewed from a top view angle in which the reflection sheet 34 is close to the light source 32. There is a scattering zone 35. Considering the size of the current pen. sulphur, lamp, and lamp reflecting section, the width of the scattering zone 35 may be no more than 3 cm from the end surface of the reflecting sheet 34 by the light source. The meter is less than 1 cm, and the scattering area % has a plurality of uneven concavo-convex patterns 42 which can change the refraction of the light source 32 and the direction of the divergence 'so that the portion irradiated to the submarine 35 The light is changed from total reflection to scattering, and the shape and position of the reflected light are changed. When the line is lighted by the backlight module 30, no obvious bright bands and dark bands are formed, and the dark line of the party side of the lamp tube is effectively reduced. The spear 5 diagram 'Fig. 5 is the unevenness of the present invention, such as a convex pattern structure--because the uneven uneven surface pattern 42 is a circular spherical groove, the uneven uneven surface pattern 42 is a circle from the side. When the size of the backlight film group of the arc = crystal display is taken into account, the uneven surface of the uneven surface map:: liquid: the size of the circle can be 3 mm um) to (10) mm, and the depth of the spherical case 2; 5 mm ((4) to such as millimeter. The most ice in the groove is worthwhile - the uneven hook surface pattern 42 can be made by dot printing, mouth sand, _, aeronautical treatment and mode material mode, which utilizes water or The high (four) gas is mixed (the scattering region 35 not shown ^ produces a non-uniform concave-convex pattern 42, = ^ is made by using a metal material to make _:::::==^ and pressing the mm surface pattern 42. In addition, using the spray The sand and the regular two uniform uneven surface pattern 42 not only exhibits an uneven distribution in the scattering region%, but each of the different sizes of the unevenness of the mesh 4 presents an irregular distribution. The uneven distribution of the uneven surface pattern must consider the V-groove produced by each backlight factory (4) The V-shaped groove contact distance, limbs and depth of the light plate, etc., through the electric job, the actual situation of the bright side and the dark band may occur, and push back 4 kinds of uneven density uneven surface pattern 42 with According to the results of this computer, the design is based on the results of the section of the computer. Please refer to the figure 6 and 7 of the figure for the comparison of the embossing _ the density of the case. The brother 6 is relatively loose. The unevenness uneven surface pattern 42 is arranged on the reflection sheet %', and the seventh figure shows that the uneven uneven surface pattern π is densely arranged on the reflection sheet 34, and the actual production has a light-emitting phase and a dark band. When the function of the unevenness of the uneven surface pattern 42 is 'there is a densely distributed distribution (4), the above electric account results are f, and the sixth and seventh figures are only reference templates for the unevenness of the uneven surface pattern 42 of the unevenness, not actual The result of the computer simulation calculation. Ι3·52861 QJ-r-6, U u 99 years] February 15th correction replacement page Because the invention adds several cases in the political area of the reflection sheet, when the light source light passes through Light reflected from the scattering region of the reflective sheet when the reflective sheet enters the ν-type grooved light guide plate The direction of refraction will change, so that the light will change from total reflection to scattering. Therefore, the light is corrected by the liquid crystal display panel, and the number of lines and dark lines will not be formed, and the formation of bright and dark lines on the side of the tube will be avoided. The problem of bright and dark lines on the side of the lamp tube. The present invention does not use the light-shielding tape to reduce light reflection, but uses a non-uniform concave-convex surface pattern. The present invention is also different from the aforementioned ones. The uniform concave and convex portion is on the entire surface reflective sheet. In the scattering region of the present invention, only the reflective sheet has a plurality of uneven concave and convex surface patterns, and the product is combined with the computer simulation result to perform the concave and convex surface design. Preferably, the equivalent variations and modifications made by the scope of the invention are intended to be within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a backlight module using a v-type trench 4 light plate in the prior art. 'Fig. 2 is a top plan view showing the position of the bright and dark bands on the side of the conventional technical towel tube. Figure 3 is a schematic view showing the structure of the backlight module of the present invention. Figure 4 is a top plan view of the position of the scattering zone of the present invention. Fig. 5 is a schematic view showing the structure of the uneven uneven surface pattern of the present invention. Figures 6 and 7 are schematic views showing the density of the uneven uneven surface pattern of the present invention. 11 1352861 [Description of main component symbols] Modified on December 15, 1999 Replacement page 10, 30 Backlight module 12, 32 Light source 14, 34 Reflector 16, 36 V-shaped grooved light guide 18, 38 Prism film 19, 39 Diffusion Sheet 20 LCD display not fast 22 Lamp 24 LCD display panel 26 Lamp side bright band 35 Scattering area 37 Reflecting plane 42 Concave surface pattern 12