200535506 五、發明說明（1) 【發明所屬之技術領彡或^ I發明係關於」種 示器之背光模組。 尤指-種應用於液晶顯 【先前技術】 由於液晶顯示器I _ ^ 於筆記”腦、行動電話u電小等優點，廣泛應用 備。因液BB本身不具發光特性―，助理等現代化資訊設 現顯不功能。 而為其提供背光模組以實 :知：光模組包括光源及 2入蔣：：置’該導光板弓|導自光：，光源係相對導光板 向J ”源或點光源 ^發出光束之方 面複數網點，用以破壞：：穴出射。該導光板之底 射t 且使其散射以提高 =光板内部傳輪之全反 而提升月光模組之整體性能。=射光束之均勾性，進 不同應不同之背光模、：之疏密、大小均可有 由導光板10、半透明鉍=、、且可茶閱第一圖。3北 ^ 〇 ^ 月材料板2〇、反# U 3 5亥月光模組9 :用：2明材料板20係 ^材料盒30及光源40組 :周及底表面12係包容 =极10之上，導光板】〇 盒3〇-側開設定位槽31以收容=料盒30内，該反光材料 源40电出之光束自導光始〇之^源40於其内。工作時，光 :面12:漸層波浪紋路及 ：：入射’經導光板以底 光，自導光板10之出先面u出：科主30作用後產生平面 散射膜（圖未示）’以使該平面朵該半透明材料板20鍍有 先7刀佈更為均勻。 200535506 五、發明說明（2) ^併麥閱第二圖’由於光源4 0 I —定 發光二極體之發射角可為30至13。度，而二之丄V 如 光源之側面係平面，使得光源4〇而^光板^相對 射後進人導光板1()，其發散角將進束㈣側面折 1 1 9.6 5 3度左右，從而在導光板10入射^大約為 13，進而降低光能利用率，影響 、:產生較☆之暗帶 光模:'之〉夜晶一顯示器之輝m光均勻,生乃至.木用該背 請參閱第三圖，係20 0 2年1月21日公主^ 5 3 0,9 1 9號揭示之-種可降低導光板“二利第 組。該背光模組於導光板3上設有複數凹；：之二？模 洞10排列設置於點光源入射點2正前方；固=凹 有一系列複數凹洞〗。，該== ::先板3，當入射光線接觸到凹則。外緣時產 折射或光全反射效應，其可破壞點光源較強之光學护 並增加光發散角度，有助於改善導光 日向十 之缺陷。 ¥先板3入射側存在暗帶 惟，該凹洞10排佈設於導光板3入光面附近，入 線接觸其表面發生之光全反射效應使部分已進入導 之入射光被反射回來，朝導光板3内部繼續傳輪之光旦反料 少’降低光利用率及背光模組出光輝度；且， 里二 10形成於導光板3内部’光線於凹祠10表面之折射盘凹况 使已入射至導光板内部之光線能量揭失；另，凹則射 率與導光板3之折射率不同，阻礙入射光線之深入傳鈐斤’ 入射點被凹洞10包圍的較小區域光強較強，其他較大*的200535506 V. Description of the invention (1) [The technical field to which the invention belongs or the invention is about the backlight module of the "display". Especially-a kind of liquid crystal display. [Previous technology] Due to the advantages of liquid crystal display I _ ^ for notes, brain, mobile phone, and small electricity, it is widely used. Because liquid BB itself does not have light-emitting characteristics-modern information devices such as assistants are now displayed. It is not functional. It is provided with a backlight module. It is known that: the light module includes a light source and 2 channels. Jiang :: sets the light guide bow | guides the light: the light source is relative to the light guide plate to the J "source or point light source. ^ Several dots on the side of the beam that are used to destroy :: acupoint exit. The bottom of the light guide plate emits t and scatters it to increase = the full transmission wheel inside the light plate instead improves the overall performance of the moonlight module. = Uniformity of the beam, different backlight modes should be used for different light density: the density and size can be provided by the light guide plate 10, translucent bismuth =, and the first picture can be read. 3 北 ^ 〇 ^ Moon material board 2〇, reverse # U 3 5 Haiyue module 9: use: 2 Ming material board 20 series ^ material box 30 and light source 40 groups: peripheral and bottom surface 12 series containment = pole 10 of On the light guide plate, a positioning groove 31 is provided on the 30-side of the box to accommodate the inside of the material box 30. The light beam emitted by the reflective material source 40 starts from the light source 40 of the light guide. When working, light: plane 12: gradient wave pattern and :: incidence 'through the light guide plate to the bottom light, from the light guide plate 10 out of the surface u out: the main master 30 produces a plane scattering film (not shown)' to The flat surface of the translucent material plate 20 is plated with the first 7 knives to make it more uniform. 200535506 V. Description of the invention (2) ^ and read the second picture ′ because the light source 40 I — fixed The emission angle of the light-emitting diode can be 30 to 13. The angle V of the second light source is a flat surface of the light source, so that the light source 40 and the light plate ^ enter the light guide plate 1 () after shooting, and the divergence angle of the light source is 1 1 9.6 5 3 degrees, so that The incidence ^ at the light guide plate 10 is about 13, which reduces the utilization of light energy, which affects: produces a darker light band than ☆: 'of> Ye Jing a display, the glow m light is uniform, even the wood. Please use this back Refer to the third picture, which is the princess on January 21, 2002 ^ 5 3 0,9 1 9-a type that can reduce the light guide plate "Erici group. The backlight module is provided with a plurality of light guide plates 3 Concave ;: 2? The mold holes 10 are arranged in front of the point 2 of the point light source; solid = concave has a series of multiple concave cavities., This == :: first plate 3, when the incident light contacts the concave. The outer edge The time-dependent refraction or total light reflection effect can destroy the strong optical protection of the point light source and increase the light divergence angle, which helps to improve the defects of the light guide to the sunward direction. ¥ Xianban 3 There is a dark band on the incident side, but the recess 10 rows are arranged near the light entrance surface of the light guide plate 3. The total reflection effect of the light that occurs when the incoming wire contacts the surface causes part of the incident light that has entered the guide to be reflected. After shooting back, the light transmission will continue to pass toward the inside of the light guide plate 3 to reduce the light utilization rate and the brightness of the backlight module; The concave condition exposes the energy of the light that has been incident into the light guide plate. In addition, the concave has an emissivity different from the refractive index of the light guide plate 3, preventing the penetration of incident light into the light. The smaller area of the incident point surrounded by the cavity 10 Light intensity is strong, others are larger *
第6頁 200535506 五、發明說明（3) 域由於入射光能量的減少、凹洞1 0之阻礙及散射能量損失 等因素，使得傳輸至該較大區域之光強較弱，影響導光板 ， 之出光均勻度及輝度。 有鑑於此，提供一種出光均勻度較高之背光模組實為 必需。 【發明内容】 本發明之目的在於提供一種出光均句度較高之背光模 組。 本發明之另一目的在於提供一種出光均句度較高之背 光模組。 __ 本發明之背光模組包括一導光板及複數點光源，該導 光板包括一入光面、一與入光面相連之出光面及一相 對i光面之底面，該複數點光源相對該入光面設置，其 中，該導光板中靠近入光面設置有複數橢圓形凹槽以配合 點光源，該橢圓形凹槽之截面長軸平行於該入光面及該底 面。 本發明之另一背光模組包括一導光板及複數點光源， 該導光板包括一入光面、一與入光面相連之出光面及一相 對出光面之底面，該複數點光源相對該入光面設置，其 中，該導光板中靠近入光面設置有複數半橢圓形凹槽以配❸ 合點光源，該半橢圓形凹槽之豎直面平行於該入光面。 相較於先前技術，由於本發明背光模組採用之導光板中靠 近入光面設置複數橢圓形或半橢圓形凹槽，該複數橢圓形 凹槽類似於二相對設置之凹透鏡之功能，半橢圓形凹槽亦Page 6 200535506 V. Description of the invention (3) Due to the reduction of the incident light energy, the obstruction of the cavity 10 and the loss of scattered energy, etc., the light intensity transmitted to the larger area is weaker, affecting the light guide plate. Light uniformity and brightness. In view of this, it is necessary to provide a backlight module with high uniformity of light output. [Summary of the Invention] The object of the present invention is to provide a backlight module with a high degree of average light output. Another object of the present invention is to provide a backlight module with a high degree of light output. __ The backlight module of the present invention includes a light guide plate and a plurality of point light sources. The light guide plate includes a light entrance surface, a light exit surface connected to the light entrance surface, and a bottom surface opposite to the i light surface. The light guide plate is provided with a plurality of elliptical grooves in the light guide plate near the light entrance surface to cooperate with the point light source. The cross-section long axis of the elliptical groove is parallel to the light entrance surface and the bottom surface. Another backlight module of the present invention includes a light guide plate and a plurality of point light sources. The light guide plate includes a light entrance surface, a light exit surface connected to the light entrance surface, and a bottom surface opposite to the light exit surface. The plurality of point light sources are opposite to the light entrance surface. The light guide plate is provided with a plurality of semi-ellipsoidal grooves arranged in the light guide plate near the light entrance surface to match the point light source. The vertical surface of the semi-ellipsoidal groove is parallel to the light entrance surface. Compared with the prior art, since the light guide plate used in the backlight module of the present invention is provided with a plurality of elliptical or semi-elliptical grooves near the light incident surface, the plurality of elliptical grooves are similar to the function of two oppositely-set concave lenses. Shaped groove
第7頁 200535506 五、發明說明（4) 類似於一凹透鏡之功能，二者皆。 導光板之光束折射後獲得較大之發$件點光源發出並進入 加均勻，進而有效減小暗帶面積，5 ^ 使得光線分布更 質 θΘ光模組之光學品 【實施方式】 一第一反射片3 0 0、一第二核組1 0 0包括一導光板 該點光源5 0 0係用以發出古^射片4 0 0及複數點光源 九束，該導光板2 〇 〇引導該 將其轉換為面光源出 請參閱第四圖，本發明背光 200、一第一反射片300、一第 500 點光源5 0 0發出光束之傳輸方向， 射。 該點光源5 0 0為發光二極，士 或小燈泡，且可藉由配置 複數不同顏色之發光二極體或小傺々%和& + t Λ4 /包以调配所需之光源顏 色與輝度。〜 該導光板2 0 0為平板形導光板，係採用壓克力、玻璃 或聚碳酸酯等透明材質製成，其包括一入光面220、與入 光面220相連之出光面240及與出光面240相對之底面260。 該入光面2 2 0係用以接收點光源5 0 0發出之光束，其上鍍有 增透膜（圖未示）。該出光面240可加工為具一定粗键度 之粗糙面。導光板2 0 0之底面2 6 0設置複數網點（圖未 示），以提高導光板2 0 0出射光束之輝度及均勻性。該網 點之大小係沿遠離入光面2 2 0之方向遞增，其為圓球狀。 該網點可以印刷或射出成型等方式分佈於導光板2 0 0之底 面 260。 側 該第一反射片3 0 0係設置於該底面2 6 07200535506 page five, description of the invention (4) is similar to the function of a concave lens, and Both. The light guide plate of the hair is obtained after a large refractive $ member from a point source to enter and uniformly applied, thereby effectively reducing the dark band area, so that the light is distributed more ^ 5 mass θΘ light optical module product of a [first embodiment] The reflective sheet 3 0 0, a second core group 1 0 0 includes a light guide plate, and the point light source 5 0 0 is used to emit ancient light sheet 4 0 0 and a plurality of plural point light sources. The light guide plate 2 0 0 guides the light source. To convert it into a surface light source, please refer to the fourth figure. In the present invention, the backlight 200, a first reflective sheet 300, and a 500th point light source 500 emit light beams in the transmission direction. The point light source 500 is a light emitting diode, a light bulb or a small light bulb, and a plurality of light emitting diodes or small 傺 々% and & + t Λ4 / packets can be configured to match the required light source color and Brightness. ~ The guide plate 200 is a flat plate-shaped light guide plate, and the like using acrylic based, transparent material made of glass or polycarbonate, which includes a light incident surface 220, 220 is connected to the light incident surface 240 and the surface of the The light emitting surface 240 is opposite to the bottom surface 260. The light incident surface 2 2 0 is used to receive the light beam emitted by the point light source 5 0 0, and an AR coating (not shown) is plated on the light incident surface. The light emitting surface 240 can be processed into a rough surface with a certain degree of rough bond. A plurality of dots (not shown) are provided on the bottom surface 2 600 of the light guide plate 200 to improve the brightness and uniformity of the light beam emitted from the light guide plate 2000. The mesh size of the dot lines 20 a direction away from the surface 2 of the increment, which is spherical. The dots can be distributed on the bottom surface 260 of the light guide plate 2000 by printing or injection molding. The first reflective sheet 3 0 0 is disposed on the bottom surface 2 6 0
第8頁 200535506 五、發明說明（5) 該底面2 6 0射出之光線反射回該導光板2 〇 〇内，可提高該背 ‘ 光模組1 0 0之光利用率。Page 8 200535506 V. Description of the invention (5) The light emitted from the bottom surface 2 60 is reflected back to the light guide plate 200, which can improve the light utilization ratio of the back light module 100.
請一併參考第五圖，係該背光模組丨〇 〇之導光板2 〇 〇及 點光源5 0 0部份俯視圖。該導光板2 〇 〇進一步包括複數橢圓 形凹槽28 0，其位於導光板2 0 0中靠近入光面2 2 0 —側，且 其數量及位置皆與該複數點光源5 〇 〇配合對應。該複數橢 f形凹槽280係與該導光板2 0 0 —體成型，與該出光面240 貫通，且其截面之長軸平行於該入光面22〇及該底面26〇。 該複數橢圓形凹槽28 0係沿平行於入光面之方向線性排 列，其間具間距。 该第二反射片4 0 0係狹長條形，具設置於該出无叫μ 了巧’且與該複數橢圓形凹槽2 8 〇相對，其可將該複數橢 圓形凹槽2 8 0中由於多次反射而漏出之光線反射回該導光 板2 〇 〇内’可提咼該背光模組1 〇 〇之光利用率。 、， 請參考第六圖，係光線經過該複數橢圓形凹槽2 8 0之 光路不意圖。由於該橢圓形凹槽2 8 〇内充滿空氣，空氣之 光折射率為1，而該導光板2 0 0材質之光折射率則大於1， $而’ 4循圓形凹槽2 8 0可視為二相對設置之四透鏡。該 2圓形凹槽2 8 0具二弧形面（未標示），自該複數點光源 〇射出之光線經該入光面22〇進入導光板2〇〇後，經該二 LV形面，連續折射，可產生發散之效果。 數松2 ^數點光源5GQ射出進人導光板2QQ之光線經該考 -進而可有效解決暗帶面積，以提高背光模組ι〇〇之Please refer to the fifth figure together, which is a top view of the light guide plate 2000 and the point light source 500 of the backlight module. The light guide plate 2000 further includes a plurality of oval grooves 28 0, which are located on the light guide plate 200 near the light incident surface 2 2 0, and the number and position of the light guide plate 2000 correspond to the plurality of point light sources 500. . The plural elliptical f-shaped grooves 280 are integrally formed with the light guide plate 200, and pass through the light emitting surface 240, and the long axis of the cross section is parallel to the light incident surface 22 and the bottom surface 26. The plural elliptical grooves 28 0 are linearly arranged in a direction parallel to the light incident surface with a space therebetween. The second reflecting sheet 4 0 0 is a long and narrow strip, and is disposed at the opening μ μ, and is opposite to the plurality of oval grooves 2 8 0. The second reflecting sheet 4 0 0 can be in the plurality of oval grooves 2 8 0. The light leaked out due to multiple reflections is reflected back to the light guide plate 2000, which can improve the light utilization efficiency of the backlight module 1000. Please refer to the sixth figure. The light path of the light passing through the complex oval groove 2 8 0 is not intended. Because the oval groove 28 is filled with air, the light refractive index of the air is 1, and the light refractive index of the material of the light guide plate 2 0 0 is greater than 1, and the circular groove 2 8 0 is visible. Four lenses set for two opposites. The two circular grooves 280 have two curved surfaces (not labeled). The light emitted from the plurality of point light sources 0 passes through the light incident surface 22 and enters the light guide plate 200, and then passes through the two LV-shaped surfaces. Continuous refraction can produce divergent effects. Shusong 2 ^ Spot light source 5GQ into the light guide plate 2QQ light through the test-which can effectively solve the dark band area to improve the backlight module ι〇〇
200535506 五 發明說明（6) 出光均勻度。 壯惟，該導光板2 0 0亦可為楔形，該網點亦可為圓柱 狀、正方體、金字塔形或其他合 γ為0柱 2 6 0亦可鍍有反射膜以替 j4底面 〜 曰代4弟反射片3 0 〇。 弟七圖所示係本發明另一背. 光源部份俯視圖。光模組6〇前述二及广 對於背光模讀之複 月先杈組6 0 0包括複數半橢圓形凹 兮、丄钇 6玄 680 tL ^ - g t f&RR? n ^68〇，*玄半橢圓形凹槽 行於:背光模=广弧形面6“，其中該暨直面682平 灯於=玄月先杈組6 0 0之入光面（圖未示 十 請參閱第八圖，係朵持^^ 之έ路示意圖。^ f έ玄複數半摘圓形凹槽68〇 光折射率為〗，而該導光 υ内充滿工乳，空亂之 大於1，逢而，兮她问ν 未彳不不）材質之光折射率則 、 “橢圓形凹槽680可視為一凹读浐氺磕c 過該登直面682時，不產生發 見為凹透鏡。先線經 684時卻可產生較強發 :，α，經過該弧形面 可有1% 政放果，使得光線更加均勻，進而200535506 5 Invention description (6) Uniformity of light output. Zhuangwei, the light guide plate 2 0 0 can also be wedge-shaped, the dot can also be cylindrical, cube, pyramid or other γ 0 pillar 2 6 0 can also be plated with a reflective film to replace the bottom surface of j4 ~ 代 代 4 Brother reflection sheet 3 0 〇. Figure 7 shows another view of the invention. Top view of the light source part. The optical module 6〇 The foregoing two and the complex for the backlight module to read the complex moon first branch group 6 0 0 includes a plurality of semi-elliptical concave, yttrium 6 x 680 tL ^-gt f & RR? N ^ 68, * Xuan The semi-ellipsoidal groove runs on: backlight mode = wide arc surface 6 ", where the flat surface 682 flat lamp Yu = the light-incident surface of the Xuanyue Xianzhi group 6 0 0 (the picture is not shown, please refer to the eighth picture, έ-based duo of road holding schematic ^^. ^ f έ Hyun complex refractive index of semi-off grooves are circular 68〇〗, and full of milk within the light guide workers [upsilon], is greater than an arbitrary empty, and every, Xi she ν Q does not not left foot) is the refractive index of the optical material, "the elliptical grooves 680 may be considered as a concave Chan Shui read through the knock c 682 when the board face, to see that a concave lens is not generated. When passing through 684 first, strong hair can be produced: α, passing through the arc surface can have 1% political effect, making the light more uniform, and
J有效解決暗帶面積，以妲古 J 度。 乂 ^ n月光模組6 0 0之出光均勻 惟，該背光模組60 0亦有 變更設計。 有巧似則述背光模組1 0 0之多種 矣示上所述，本發明禮ρ Μ 出專利中&。_ 確已付合發明專利要件，爰依法提 式，舉凡熟悉本案技藝之;^僅ί本發明之較佳實施方 ’在援依本案發明精神所作J effectively resolves the area of the dark zone to ancient J degrees. ^ ^ The moonlight module 600 has a uniform light output. However, the backlight module 600 also has a design change. Coincidentally, the various types of backlight module 100 are described above. As shown in the above, the present invention is patented & _ Indeed paid engagement elements patent disclosure, Yuan-lift law, that whenever the art are familiar with the case; ^ ί only the preferred embodiment of the present invention 'the aid made according to the spirit of the invention in this case
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第11頁 200535506 圖式簡單說明 第 — 圖 係 一 種 先 前 技術 背 光 模 組 之 立 體 分 解 圖 〇 第 二 圖 係 第 一 圖 所 示先 前 技 術 背 光 模 組 之 部 份 光 路示意 圖 〇 第 二 圖 係 又 一 種 先 前技 術 背 光 模 組 之 平 面 視 圖 〇 第 四 圖 係 本 發 明 背 光模 組 之 立 體 示 意 圖 〇 第 五 圖 係 本 發 明 背 光模 組 之 導 光 板 及 點 光 源 部 份> ί府視圖 第 六 圖 係 本 發 明 背 光模 組 之 部 份 光 路 示 意 圖 〇 第 七 圖 係 本 發 明 另 一背 光 模 組 之 導 光 板 及 點 光 源- 郎份俯 圖 〇 第 八 圖 係 本 發 明 另 一背 光 模 組 之 部 份 光 路 示 意 圖 〇 [ 主 要 元 件 符 號 說 明】 背 J 光 模 組 100、 600 光 源 500 導 光 板 200 入 光 面 220 出 光 面 240 底 面 260 橢 圓 形 凹 槽 280 半 橢 圓 形 凹 槽 680 第 一 反 射 片 300 第 二 反 射 片 400 豎 直 面 682 弧 形 面6 8 4Page 11 200535506 Brief description of the drawings — — The diagram is a three-dimensional exploded view of a prior art backlight module. The second diagram is a partial light path diagram of the prior art backlight module shown in the first diagram. The second diagram is another kind of previous The plan view of the technical backlight module. The fourth figure is a perspective view of the backlight module of the present invention. The fifth figure is the light guide plate and the point light source part of the backlight module of the present invention. The sixth view is the backlight of the present invention. Schematic diagram of part of the light path of the module. The seventh diagram is a light guide plate and a point light source of another backlight module of the present invention. Top view is a schematic diagram of a part of the light path of another backlight module of the present invention. [Main Description of component symbols] Back J light module 100, 600 light source 500 light guide plate 200 light entrance surface 220 light exit surface 240 bottom surface 260 oval 280 semi-elliptical groove-shaped recess 680 of the first reflective sheet 300, the second reflective sheet 400 vertical straight surface 682 arcuate surface 684
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