M278907 八、新型說明： 【新型所屬之技術領域】 本創作係關於一種液晶顯示器（liquid crystal display，LCD)背光源，尤其是一種能夠使LED光源出射 光線所涵蓋之角度範圍更為廣闊之LCD背光源光學元件 結構。 【先前技術】 液晶顯示器由於具有重量輕，體積小的特性，因此由 過去筆記型電腦等小型設備之顯示裝置，逐步應用並已有 取代傳統CRT螢幕或電視之趨勢，其也隨著零組件之性能 提高，使得LCD面板尺寸、亮度、對比等規格，亦一直在 進步提升當中。其中，在大型LCD之發展需求下，足夠的 顯像亮度、寬廣的觀看視角、、鮮明的影像對比以及較長的 使用壽命，已成為研發最主要的重點，因而在此種標準要 求下，直下式的背光模組形態便成為大型LCD發展的技術 主流。 習知直下式的背光模組請參閱第一圖，一般LCD係 由上半部的液晶面板10與下半部提供光源之背光模組20 所構成。背光模組20主要包括一稜鏡片2卜一擴散膜22、 一導光板23、一反射罩24與一光源25。目前所利用於直 下式背光模組之之光源24包括電激發光（EL)、冷陰極螢 光燈（CCFL)、陰極發射燈（CCL)或金屬鹵化燈等，其 M278907 $ 乂 :陰極螢光燈應用最廣。光源24所發射之光線係直接 牙透光板23以及具有配光效果之稜鏡片21與擴散膜 22而此均勻的由背光模組1〇表面射出，並透射進入液晶 面板10中。 此以-般使用冷陰極螢光燈之直下式背錢組與侧光 式背ΐ模組相比較，因前者設有較多的燈管數，且光線可 直接牙透‘光板（有些甚至並未設有導光板），可避免一些 側，的漏失，而使整體之輝度與發光效能大幅提升。然而7 » 帛㈣目增多時’其所產生的熱能亦較多，所造成之溫度 亦會對液晶分子或是彩色光阻產生影響，而有色彩異 變的現象’通常必須將背光模組的厚度增加，以減低此種 干支口而不得不加大LCD之厚度體積。除此之外，燈管 1之刀佈排列，相當容易產生明暗條紋之情況，並對齊度 產生一定的影響。 又 因此曾有利用LED光源取代冷陰極螢光燈之背光模 I 、组產，，由於LED総具有體積小、產熱性低、耗電量低、 使用f命長的特性，加上近來製造技術之進步，其發光亮 度不_提升’且其製造成本亦逐漸降低，目前已逐步應用 於各種照明設備中，未來，led光源更可能取代目前燈泡 或曰光燈源’而成為照明設備中最重要之發光元件，但是 ::一LED光源作為LCD背光源仍有其存在之問題。請參閱 第圖炫以2 Θ丨/2為120度之表面黏著型（smd) L£d 光源30為例（θ m係指led發光強度值為軸向強度值一 時該方向絲向之夾角，2倍‘即為㈣），其與照射= 6 M278907 面在距離為x之情況下，若以复日” 度的圓周範圍内之昭戶气嘗?、射所能涵蓋直徑為X長 此，在—定均勾度；:能達成65%之均勾度。因 欲使其光照區域滿佈並能均勻：:=二面積財.，若 設置相當多的led井湄，^ * 、面板上就必須 目不足’則將無法克服前述明:1相門= 广’若設置數 失，而衫響到顯像的品質。 、-、 【新型内容】 以及歧之高產熱 #x差之缺點，本創作將提 、 透鏡體，料LCD背光源n :先源之 提昇其__增加’甚至在該範圍内 的數、’、、、“ X’並同時能夠減少背光模組中led設置 的數目，以降低背光模組之製作成本。 _ 作之LCD背光源光學元件結構’包括：一透鏡 透鏡體係呈半球體圓弧狀，並設有一入光面與一出 、幸㈡〆入光面王圓弧凸面狀，其曲率由中心軸向外側逐 二小’而該出光面則係呈弧凹面狀，其曲率則由中心軸 1側逐漸’交大。其中’該透鏡體之出光面可設有複數個 =。圓排列之配光鏡條，各該配光鏡條之曲率可為零、 或為負其亦可在出光面表面上以鑽石面之排列方式， =滿複數個小配光鏡面，該些小配光鏡面之曲率亦可為 令、正或為負，而每一小配光鏡面其水平與垂直軸像之曲 M278907 率亦可為相同或相異。 發散m創作lcd背光源光學元件，可使咖光源所 ^…、，經過該透鏡體之折射，改變原光線出射之角 面/使正如·出射光線之角度變大，而能夠涵蓋更大的 二二另一方面，則同時改變出射光線強度之分佈， =中：光線強度較強之區域，往與軸向較大角度之： =、夕使出射角度較大光線之強度加強，並降低中央轴 二=:度’以使led光源所發出之光線能夠在穿透該 ，鏡體内。卜段距離後，照射到較外圍且較遠距離之表面 :用^不會使均勾度降低’反而可增加其均勾度。因此， 本創作方法，可使LED光源在作為咖之背光源 持在較高料度之水準下，照射涵蓋較習知咖光 積r;:r的區域，-方面使被照： …面則因照射面積之大幅擴增， =配置較少的哪光源，因而亦有大幅降低設備成本之 所前x下將配合圖式進—錢明本創作的實施方式，下述 所列舉的實施例係用以闡明本 之範圍，任何熟習此技藝者，二 圍:，當可做些許更動與潤娜，因此本創作‘ 視後附之申請專利範圍所界定者為準。 【實施方式】 M278907 請同時參閱第三圖鱼 LCD背光源光學 圖’以圖係本創作實施例 源光學亓杜 不思圖，而第四圖則為LCD背光 係—透鏡體40，該透背光源光學元件 呈有m ^ 、兄體40係一半球體圓弧狀鏡體，其 八’八尤面41以及一屮亦 面，而出光面42則你Ϊ 41 '系一圓弧凹 卬尤曲42則係一圓弧凸面。 4繼續參閱第四圖’人光面4ι之弧凹面以中心抽㈧ 、。點，其曲率由中心軸60向外側，由大逐、#押丨_ :如圖式中所示，鏡面切線與中:二^ 面：：b丨角度’再向C角度逐漸變小。而出光面42之弧凸 =則由中心軸6〇向外側由小變大，亦如圖式，鏡面切 線與中心軸60之夾角，由a备皮a D + 逐漸變大。 由八角度向B角度，再向C角度 因此，請參閱第五圖，由LED光源3〇所發射出之光 二’由人光面41進人透鏡體4〇時經過第—次折射，該些 :、在再由出光面42經過第二次折射後，射出該透鏡體仙。 由於入光面41愈接近中心軸6G之曲率愈大，因此由該處 入^之光線折射角也愈大’使其愈容易往兩側分散射出， 而遠離中心軸60之外側區域，則因為曲率小，產生之折射 角小，因此在兩側方向之光線並未有較大之偏折。該等光 線接觸到出光面42時，則由於愈靠近中心軸6〇之曲率愈 小:其折射角度亦愈小，原本出射之光線角度偏折不大， 仁运雄中心軸60之外側區域，則因曲率變大，折射角度也 增大，進一步使該些出射光往中心軸6〇兩側偏移，^得 M278907 L士ED光源30之出射光線，大幅增加其照射的區域，其 =由於將光線往兩側偏移折射，也使得兩側之光線強度 :::靖之光線強，如此可補強由中心軸外兩側所發 射出更遂且分佈更廣之光線，使其照射在咖背 之光學膜片時’能夠維持相當之照度，而使整體照射區域 之均勻度提局，以進一步提升LCD顯像之品質。 一M278907 8. Description of the new type: [Technical field to which the new type belongs] This creation is about a liquid crystal display (LCD) backlight, especially an LCD backlight that can make the angle range covered by the light emitted by the LED light source wider. Source optical element structure. [Previous technology] Due to the characteristics of light weight and small size, liquid crystal displays have been gradually used by display devices such as notebook computers in the past and have replaced the traditional CRT screens or televisions. With the improvement of performance, the size, brightness, contrast and other specifications of LCD panels have also been improving. Among them, under the development needs of large LCDs, sufficient display brightness, wide viewing angles, sharp image contrast, and long service life have become the main focuses of research and development. The backlight module type has become the mainstream technology of large LCD development. Please refer to the first figure for the conventional direct type backlight module. Generally, the LCD is composed of the liquid crystal panel 10 in the upper half and the backlight module 20 which provides a light source in the lower half. The backlight module 20 mainly includes a diaphragm 2, a diffusion film 22, a light guide plate 23, a reflection cover 24 and a light source 25. The light source 24 currently used in direct-type backlight modules includes electric excitation light (EL), cold cathode fluorescent lamp (CCFL), cathode emission lamp (CCL), or metal halide lamp, etc., its M278907 $ 乂: cathode fluorescent Lamps are most widely used. The light emitted by the light source 24 is a direct light transmission plate 23, and a diaphragm 21 and a diffuser film 22 having a light distribution effect, and this is uniformly emitted from the surface of the backlight module 10 and transmitted into the liquid crystal panel 10. Therefore, the direct-type back money set using cold-cathode fluorescent lamps is generally compared with the side-light back-type module. No light guide plate is provided), which can avoid the leakage of some sides, and greatly improve the overall brightness and luminous efficiency. However, when the number of heads increases, 'they generate more heat energy, and the resulting temperature will also affect the liquid crystal molecules or color photoresistors, and there is a phenomenon of color change'. The thickness is increased to reduce the thickness of the dry branch and the LCD has to be thickened. In addition, the knife cloth arrangement of the lamp tube 1 is quite easy to produce bright and dark stripes, and the alignment has a certain effect. Therefore, there have been backlight module I and group products that use LED light sources to replace cold cathode fluorescent lamps. Due to the small size, low heat generation, low power consumption, and long lifespan of LEDs, coupled with recent manufacturing technologies With the progress, its luminous brightness does not increase, and its manufacturing cost has gradually decreased. At present, it has been gradually used in various lighting equipment. In the future, LED light sources are more likely to replace current bulbs or light sources and become the most important in lighting equipment Light-emitting element, but :: an LED light source as an LCD backlight still has its problems. Please refer to the figure below. Take 2 Θ 丨 / 2 as the surface-adhesive type (smd) L £ d light source 30 as an example. (Θ m refers to the angle between the direction of the wire direction of the LED when the luminous intensity value of the LED is the axial intensity value. 2 times' is ㈣), and the distance between it and the irradiation = 6 M278907 surface at a distance of x, if it is in the range of a circle of multiple days, Zhaohao Qi taste, the diameter of the radiation can cover X length, In-set average hook degree ;: can reach 65% average hook degree. Because it is intended to make its light area full and uniform:: = two area wealth. If a large number of LED wells are installed, ^ *, on the panel If you have insufficient eyes, you will not be able to overcome the above-mentioned explanations: 1 phase gate = wide. If the number of settings is lost, the shirt sounds to the quality of the image..-, [New content], and the shortcomings of Qizhi high heat #x poor, This creation will mention, lens body, LCD backlight source n: the first source to improve its __ increase 'even in this range,' ,,, 'X' and at the same time can reduce the number of LED settings in the backlight module To reduce the manufacturing cost of the backlight module. _ The structure of the LCD backlight optical element 'includes: a lens lens system has a hemispherical arc shape, and is provided with a light entrance surface and an exit, fortunately the light entrance surface is a circular arc convex shape, the curvature of which is from the central axis The light-emitting surface is arc-concave, and its curvature gradually increases from the center axis 1 side. Among them, the light emitting surface of the lens body may be provided with a plurality of =. Circular light distribution mirror strips, the curvature of each light distribution mirror strip can be zero, or it can be negative. It can also be arranged on the light emitting surface in the form of a diamond surface. = Full of a plurality of small light distribution mirrors, these small distribution The curvature of the light mirror surface can also be ordered, positive, or negative, and the curvature of the horizontal and vertical axis images of each small light distribution mirror M278907 can also be the same or different. The divergent m creation LCD backlight optical element can make the light source ^ ..., through the refraction of the lens body, change the angle of the original light exit / make the angle of the outgoing light larger, and can cover a larger On the other hand, at the same time, the distribution of the intensity of the exiting light is changed at the same time. = Medium: the area with the stronger light intensity, and the larger angle to the axis: =, the intensity of the light with the larger exit angle is strengthened, and the central axis is reduced. Two =: degrees' so that the light emitted by the led light source can penetrate the lens body. After the distance, the surface is irradiated to a more peripheral and longer distance: using ^ will not reduce the average hooking degree, but will increase its average hooking degree. Therefore, this creative method can make the LED light source as the backlight of the coffee at a higher level, and illuminate the area covering the more familiar light product r;: r,-the side makes the illuminated: ... Due to the large expansion of the irradiation area, = which light source is configured less, so there are also significant reductions in equipment costs. The previous x will be coordinated with the drawings. The implementations created by Qian Ming, the examples listed below are To clarify the scope of this book, anyone who is familiar with this skill, Erwei: When some changes and Runna can be done, therefore this creation 'is subject to the definition of the scope of the attached patent application. [Embodiment] M278907 Please also refer to the third picture of the LCD of the LCD backlight source. The picture shows the source optics of this creative example. The fourth picture shows the LCD backlight system—the lens body 40. The transparent backlight The source optical element is m ^, the sibling body 40 is a semi-spherical arc-shaped lens body, and its eighth and eighth surfaces are 41 and one side, and the light-emitting surface 42 is a thirty-fourth side. 42 is a convex arc. 4 Continuing to refer to the fourth figure, the arc concave surface of the human smooth surface is drawn in the center. The curvature of the point is from the central axis 60 to the outside, from the chase, # 丨 丨 _: as shown in the figure, the mirror tangent and the middle: two ^ plane:: b 丨 angular angle, and then gradually decrease toward the C angle. The arc convex of the light-emitting surface 42 changes from small to large from the central axis 60 to the outside. As shown in the figure, the angle between the tangent of the mirror surface and the central axis 60 gradually increases from a prepared skin a D +. From the eighth angle to the B angle, and then to the C angle, please refer to the fifth figure. The light emitted by the LED light source 30 passes through the first refraction when the light surface 41 enters the lens body 40. : After the second refraction by the light emitting surface 42, the lens body is emitted. Because the curvature of the light incident surface 41 is closer to the central axis 6G, the greater the angle of refraction of the light entering there, the easier it is to scatter out to both sides, and away from the area outside the central axis 60, because The curvature is small, and the angle of refraction is small, so there is no large deflection of the light in the direction of both sides. When these rays contact the light-emitting surface 42, the curvature is smaller the closer to the central axis 60: the smaller the angle of refraction, the smaller the angle of the originally emitted light, the area outside the central axis 60 of Ren Yunxiong, Because the curvature becomes larger and the refraction angle also increases, the emitted light is further shifted to both sides of the central axis 60, and the light emitted from the M278907 L ED light source 30 is greatly increased, which is due to Refraction of light rays to both sides also makes the light intensity on both sides ::: Jing's light strong, so that it can strengthen the wider and wider light emitted from the two sides outside the central axis, making it shine on the back of the coffee When the optical film is used, it can maintain a considerable illuminance, and improve the uniformity of the overall irradiation area, so as to further improve the quality of LCD display. One
本創作之第二實施例請參閱第六圖，本創作實施例之 ，鏡體結構，亦可於前述透鏡體之出光㈣表面設置數個 主同心圓分佈之配光鏡條43〇，該配光鏡條43q可為 為零之斜面體431。每一斜面體431係沿出光面们表面之 切線，兩兩成-夾角變化，由中心軸6 Q圓心處以同心圓方 式’向外側連接延伸。請同時參閱第七圖，該圖係本創作 第二實施例透鏡體之剖視圖。該透鏡體入光面41之曲率變 化同前所述，鏡面切線與中心軸6〇之夾角，由&角戶向^ 角度，再向C角度逐漸變小。而各斜面體431間之曲 化亦與前述出光面42之變化相同，由中心軸6〇向外側： 小變大’由A角度向B角度，再向c角度逐漸變大。本每 施例其出射之紐分佈亦與前述透鏡體之光線分佈相當二 似（請參閱第五圖）’同樣具有將LED光源3〇所發散 線加以配光，而呈現較大面積之照射範圍。同時藉由出射 光線向兩側偏移之結果，使中心軸方向之出射光^強度較 兩側為低，也藉由中心軸外兩側光線強度之補強，提^^ 心軸外兩側出射光線照射區域之照度，進而提高整體=板 上之均勻度，並能提升LCD顯像品質。 κ M278907 本創作之第三實施例請同時參閱第八圖與第九圖，本 創作實施例之透鏡體，亦可於前述透鏡體之出光面43表 面，設置數個呈同心圓分佈之配光鏡條430，而該配光鏡 條430可為曲率為負之弧凹體432。其亦如前述，每一弧 凹體432係沿出光面43表面之切線，兩兩成一夾角變化， 由中心軸60圓心處以同心圓方式，向外側連接延伸。由於 各弧凹體432其曲率為負，因此光線經過弧凹體432表面 時，有散射之現象，透鏡體從出光面43之中心轴延伸至外 側，皆有弧凹體432之色散效果，可使由弧凹體432出射 之光線進行光線之交集混合，而能夠使出射光線產生混光 之效果，如此將可提升出射光線之均勻度，而進一步使整 體之發光更為均勻，亦有改善LCD顯示品質之效果。 本創作之第四實施例請同時參閱第十圖與第十一 圖，本創作實施例之透鏡體，亦可於前述透鏡體結構之出 光面43表面，設置數個呈同心圓分佈之配光鏡條430，該 配光鏡條430亦可為曲率為正之弧凸體433。其中，每一 弧凸體433係沿出光面43表面之切線，兩兩成一夾角變 化，由中心轴60圓心處以同心圓方式，向外侧連接延伸。 由於各弧凸體433其曲率為正，因此光線經過弧凸體433 表面後，會產生交集之混光效果，如此將可提升出射光線 之均勻度，而進一步使整體之發光更為均勻，同時能夠改 善LCD之顯示品質。 本創作之第五實施例請參閱第十二圖，本創作實施例 之透鏡體，亦可於前述透鏡體結構之出光面44表面，設置 M278907 數個呈鑽石面分佈排列之小配光鏡面440，且該小配光鏡 面440之曲率可為零。其與前述斜面體431之結構相當類 似’而僅將呈同心圓排列之每一斜面體43丨再分隔出更小 鏡面面積之小斜面塊441。因此，本實施例透鏡體之整體 結構仍與前述透鏡體40之結構相同，而僅在出光面44表 面有所差異。所以原本使LED光源向兩侧折射並增加兩側 光度強度之效果並未改變，只是，透過該些小斜面塊441 之折射作用’使出射光線間會增加彼此交集混光之機會， 而具有使該射出光線更為均勻之效果。 方面，前述小配光鏡面44〇之曲率亦可為 —，〜一 〜叫卞，ΛΙ、Μ钩貝坎 ，而分別形成數個以鑽石面方式排列的弧凹狀或弧凸狀 小鏡面集合。請參閱第十三圖與第十四圖，其所形成之弧 凹狀或弧凸狀小鏡面分別為小弧凹塊442肖小弧凸塊 面編而為本創作之第六與第七實施例。各該小配光鏡 .,，…'論其為小弧凹塊442或是小弧凸塊443，苴排列 •《2小斜面塊441相同’其差異僅在於小配光鏡面楊 以交隹無論其曲率為何，二者皆有前述將出射光線加 效果，亦能夠大幅提昇LED光源整體照射之 垂直方向之曲率可為相同或:=、弧凸塊-，其水平與 圖，2創作之第八實施例請同時參閱第十五圖與第十六 圖本創作之透鏡體結構，亦 該鏡體四邊設有四個垂直切面72 半球體弧面鏡體’ —A ^ * 71 rt 。该透鏡體70，亦具有 人—出光面72。入光面71之弧凹面曲率以中 M278907 心軸60為中心點，由中 之弧凸面曲率則由中心軸6〇° ::逐漸變小’而出光面72 ^ ^ B ^ 向外側變大。因此，本實你如 度之、效果增力，光度強 ::可在出光面72表面上以鑽石面排列為方^ :小：紐：，該些小配光鏡面之曲率亦可為 :L:r光鏡面其水平與垂直轴像之曲率亦可為 請參閱第十七圖，透鏡體40可套蓋於一 LED光源扣 ，而该led光源30則可輕接於—基座5〇 i，用 請再參閱第十八圖，當本創作之咖 ^源“70件應用於背光模組中時，透鏡體4G之入光面 光二前:咖光源3〇相接設，而出光面挪 中最接近LED背光源之光學膜片z，而可置於“ ::Z下方X距離處，則咖光源3〇射出之光線 ，兄肢40之折射後，可照射到光學膜片z上直 :圓周區域内，而船約為距離X之2倍二倍長I 述所利狀LED光源可為SMD型之咖，或1他 咖，而其發光顏色則可為白光或其他依需要之其他色，光。 藉由本創作’由透鏡體40射出之光線，其接近 =度較小之出射光線其強度較低，但其照射距離短，所 、只放之面積小’所以照度將略微降低；而出射角度較大之 光線，其與被照射表面之距離較遠，马散之區域較大， 13 M278907 因此會使分佈纟每-單位面積上之光 造成發光角度較大之出射光照度驟降，：:本創作本： 於發光角隸大之㈣光其強度大㈣加 缘 之照度均勾度仍能維持在75%以上。^、、桌處 〇度射出至光學膜片z之光線昭卢 光源軸向 直徑為2X長度至7χ長度ϋ,Γ計算時，該等在 、 长度之圓周邊緣之光線照度則有75 卜〇 因此，透過本創作之LCD背光源光學元件，可使咖 籲冑光源其照射之區域在均勾度7 5 %以上之條件下, 習知L E D光源所照射涵蓋面積增加約4倍至* 9倍之多广 -方面使被照射表面之均勾度提高，另—方面則因照射面 積之大幅擴增，LCD之背光模組中能夠配置較少的咖 光源，因而亦能夠大幅降低設備所需的成本。 【圖式簡單說明】 第一圖係習知LCD背光模組之示意圖。 第二圖係習知LED光照之示意圖。 第三圖係本創作實施例LCD之示意圖。 第四圖係本創作實施例LCD之剖視圖。 第五圖係本創作實施例LCD背光源之光徑示意圖。 第六圖係本創作第二實施例之示意圖。 第七圖係本創作第二實施例之剖視圖。 第八圖係本創作第三實施例之示意圖。 14 M278907 第九圖係本創作第三實施例之剖視圖。 第十圖係本創作第四實施例之示意圖。 第十一圖係本創作第四實施例之剖視圖。 第十二圖係本創作第五實施例之示意圖。 第十二圖係本創作第六實_之剖視圖。 第十四圖係本創作第七實施例之示意圖。 第十五圖係、本創作第人實施例之示意圖。 f十六圖係本創作h實施例之剖視圖。 第十七圖係本創作實施例與led光源組設之示意圖。 第十八圖係本創作實施例光照示意圖。 【主要元件符: 10 液晶面板 20 .背光模組 21 稜鏡片 23 導光板 25 光源 30 LED光源 40 透鏡體 41 入光面 43 出光面 號說明For the second embodiment of this creation, please refer to the sixth figure. In this creative embodiment, the lens body structure can also be provided with a plurality of main concentric circle light distribution mirror bars 43 on the light emitting surface of the aforementioned lens body. The light mirror bar 43q may be a bevel 431 with zero. Each oblique body 431 is connected along the tangent line of the light-emitting surfaces, and the angle changes by two, and it is extended from the center of the central axis 6 Q in a concentric circle manner to the outside. Please also refer to the seventh figure, which is a sectional view of the lens body of the second embodiment of the present invention. The curvature change of the light incident surface 41 of the lens body is the same as described above. The angle between the tangent of the mirror surface and the central axis 60 is gradually reduced from the angle of Angular angle to the angle of C. The curvature between the bevels 431 is also the same as that of the light-emitting surface 42 described above, from the central axis 60 to the outside: small to large ', from A angle to B angle, and then to c angle. In this example, the distribution of the emission button is also quite similar to the light distribution of the aforementioned lens body (see the fifth figure). It also has the light distribution of the divergent line of the LED light source 30 and presents a larger area of illumination . At the same time, as a result of the deviation of the emitted light to both sides, the intensity of the outgoing light in the direction of the central axis is lower than that of the two sides. The illuminance of the light irradiated area, thereby improving the overall = uniformity on the board, and can improve the quality of LCD display. κ M278907 Please refer to the eighth and ninth images for the third embodiment of this creation. The lens body of this embodiment can also have several light distributions arranged in a concentric circle on the surface of the light-emitting surface 43 of the aforementioned lens body. The mirror strip 430, and the light distribution mirror strip 430 may be an arc concave body 432 having a negative curvature. As described above, each arc concave body 432 is along a tangent to the surface of the light-emitting surface 43, and the included angle changes from two to two, and the concentric circles extend from the center of the central axis 60 to the outside. Because the curvature of each arc concave body 432 is negative, when the light passes through the surface of the arc concave body 432, there is a phenomenon of scattering. The lens body extends from the central axis of the light exit surface 43 to the outside, and the dispersion effect of the arc concave body 432 can The light emitted by the arc concave body 432 is mixed and mixed with each other, so that the emitted light can have a mixed light effect, so that the uniformity of the emitted light can be improved, and the overall light emission can be more uniform, and the LCD can be improved. The effect of display quality. For the fourth embodiment of this creation, please refer to the tenth and eleventh drawings at the same time. The lens body of the present embodiment can also be provided with a plurality of light distributions arranged in a concentric circle on the surface of the light emitting surface 43 of the aforementioned lens body structure. The mirror strip 430, which is also an arc convex body 433 with a positive curvature. Among them, each arc convex body 433 is along a tangent to the surface of the light-emitting surface 43, and the included angle varies from two to two, and the concentric circle is extended from the center of the central axis 60 to the outside. Because the curvature of each arc convex body 433 is positive, the light mixing effect will be produced after the light passes through the surface of the arc convex body 433. This will increase the uniformity of the outgoing light and further make the overall light emission more uniform. Can improve the display quality of LCD. For the fifth embodiment of this creation, please refer to FIG. 12. The lens body of this creative embodiment can also be provided with a plurality of small light distribution mirror surfaces 440 arranged in a diamond plane on the light emitting surface 44 surface of the aforementioned lens body structure. The curvature of the small light distribution mirror 440 may be zero. It is quite similar to the structure of the aforementioned bevel 431, and only each bevel 43 43 arranged in a concentric circle is separated into a small bevel block 441 with a smaller mirror area. Therefore, the overall structure of the lens body in this embodiment is still the same as the structure of the lens body 40 described above, but differs only in the light emitting surface 44 surface. Therefore, the effect of originally refracting the LED light source to both sides and increasing the photointensity on both sides has not changed, but the refraction effect of these small bevel blocks 441 will increase the opportunity for the light rays to intersect and mix with each other. The effect of emitting more uniform light. On the other hand, the curvature of the aforementioned small light distribution mirror surface 44 can also be-, ~~~ is called —, ΛΙ, Ｍ 钩 贝坎, and respectively forms a plurality of small arc-concave or arc-convex small mirrors arranged in a diamond plane manner. . Please refer to the thirteenth and fourteenth drawings. The arc-concave or arc-convex small mirror surfaces formed by them are small arc concave blocks 442 and Xiao arc small convex surfaces, which are the sixth and seventh implementations of this creation. example. Each of the small light distribution mirrors ,,, ... 'On whether it is a small arc concave block 442 or a small arc convex block 443, the arrangement is "2 small bevel blocks 441 are the same', the difference lies only in the small light distribution mirror Yang Yijiao Regardless of their curvature, both of them have the aforementioned effect of adding the outgoing light, which can also greatly improve the vertical direction of the overall illumination of the LED light source. The curvature in the vertical direction can be the same or: For the eighth embodiment, please refer to the lens structure created in the fifteenth and sixteenth drawings at the same time, and the four sides of the lens body are provided with four vertical cut planes 72 hemispherical arc lens body '— A ^ * 71 rt. The lens body 70 also has a human-light emitting surface 72. The curvature of the concave surface of the arc of the light incident surface 71 is centered on the central axis M278907 of the mandrel 60, and the curvature of the convex surface of the middle arc is centered from the central axis 60 ° :: gradually becomes smaller 'and the light exit surface 72 ^ ^ B ^ becomes larger outward. Therefore, if you have the best degree, the effect is strong, and the luminosity is strong :: You can arrange the diamond surface on the surface of the light-emitting surface 72 as a square ^: Small: New: The curvature of these small light distribution mirrors can also be: L: The curvature of the horizontal and vertical axis image of the r-light mirror can also be referred to FIG. 17. The lens body 40 can be covered by an LED light source button, and the LED light source 30 can be lightly connected to the base 50i. Please refer to the eighteenth figure again. When 70 pieces of the source of this creation are used in the backlight module, the light incident surface of the lens body 4G is front two: the light source 30 is connected and the light emitting surface is moved. The optical film z closest to the LED backlight source can be placed at a distance X below ": Z, then the light emitted by the light source 30 can be irradiated onto the optical film z after being refracted by the limb 40: In the peripheral area, and the ship is about twice as long as two times the distance X. The LED light source described in the above description can be an SMD type or 1 other type, and its luminous color can be white or other colors as required. ,Light. With this creation, 'the light emitted from the lens body 40 is close to a small degree, and the intensity of the emitted light is low, but its irradiation distance is short, so the area where it is placed is small, so the illumination will be slightly reduced; Large light, its distance from the illuminated surface is large, and the area of Ma San is relatively large. 13 M278907 Therefore, the light on the distribution unit per unit area will cause a sharp decrease in the emitted light intensity.::this creation Ben: The intensity of the light at the luminous angle is large, and the average brightness of the illuminance plus margin can still be maintained above 75%. ^, The light emitted from the 0 degree light at the table to the optical film z. The axial diameter of the Zhaolu light source is 2X length to 7χ length. When calculating Γ, the illuminance of the light at the peripheral edge of the length is 75. Through the optical elements of the LCD backlight source created by this creation, the area illuminated by the LED light source can be increased by 75% or more, and the area covered by the LED light source is increased by about 4 times to 9 times. How wide-on the one hand, the uniformity of the illuminated surface is improved, and on the other hand, due to the large expansion of the irradiation area, fewer backlight sources can be configured in the LCD backlight module, which can also significantly reduce the cost of the equipment. . [Schematic description] The first diagram is a schematic diagram of a conventional LCD backlight module. The second picture is a schematic diagram of the conventional LED lighting. The third figure is a schematic diagram of the LCD of this creative embodiment. The fourth figure is a cross-sectional view of the LCD of this creative embodiment. The fifth figure is a schematic diagram of the light path of the LCD backlight source of the creative embodiment. The sixth diagram is a schematic diagram of the second embodiment of this creation. The seventh figure is a cross-sectional view of the second embodiment of the present invention. The eighth diagram is a schematic diagram of the third embodiment of this creation. 14 M278907 The ninth picture is a cross-sectional view of the third embodiment of this creation. The tenth diagram is a schematic diagram of the fourth embodiment of this creation. The eleventh figure is a cross-sectional view of the fourth embodiment of the present invention. The twelfth figure is a schematic diagram of the fifth embodiment of this creation. The twelfth figure is a sectional view of the sixth reality of this creation. The fourteenth diagram is a schematic diagram of the seventh embodiment of the present invention. The fifteenth figure is a schematic diagram of the first embodiment of this creation. The sixteenth figure is a sectional view of the embodiment of the present invention. The seventeenth figure is a schematic diagram of the creative embodiment and the arrangement of the LED light source. The eighteenth figure is a schematic diagram of the lighting example of this creative embodiment. [Main component symbols: 10 LCD panel 20. Backlight module 21 Cymbal 23 Light guide plate 25 Light source 30 LED light source 40 Lens body 41 Light entrance surface 43 Light exit surface Description of the number
22 擴散片 24 反射罩 42 出光面 430配光鏡條 15 M278907 431 斜面體 432 弧凹體 433 弧凸體 44 出光面 440 小配光鏡面 441 小斜面塊 442 小弧凹塊 443小弧凸塊 50 基座 60 中心軸 70 透鏡體 71 入光面 72 出光面 721 垂直切面 X 距離 Y 直徑 ζ 光學膜片 1622 Diffuser 24 Reflector 42 Light emitting surface 430 Light distribution mirror strip 15 M278907 431 Bevel body 432 Arc concave body 433 Arc convex body 44 Light emitting surface 440 Small light distribution mirror surface 441 Small bevel block 442 Small arc concave block 443 Small arc convex block 50 Base 60 Central axis 70 Lens body 71 Light entrance surface 72 Light exit surface 721 Vertical section X distance Y diameter ζ Optical diaphragm 16