M345352 八、新型說明： 【新型所屬之技術領域】 本創作係有關一種LED透鏡構造，尤指一與LED晶片基板連接的透鏡，包 括一下半鏡體及一上半鏡體，用以使無法利用的側向光經由二次折射而進入 LED的有效出光範圍、並使中間密集的光線可適度地往旁邊分散，進而得到 較大的出光角度與較佳的出光均勻性者。 φ 【先前技術】 隨著LCD產品尺寸的加大，背光模組所佔的成本越高，直下式背光模組 已經成為生產大尺寸LCD產品所必備的關鍵技術。應用高功率LED作為大 尺寸直下式背光模組的光源時，首先要面對的是LED點光源發光特性所造 成的出光面難以均勻的問題。 如第1圖所示，目前市售之發光二極體(LED)按照配光曲線可分為四大 類：聚光型、邊光型、朗伯型及蝠翼型。而用於直下式背光模組光源多以 _ 朗伯型及邊光型為主，然而朗伯型雖具有均勻度高的優點，但卻有發光角度 ‘ 小之缺點。 邊光型的發光角度雖大，但其發光均勻度過低、造成中間區域光線不足 的缺點。目前LED背光模組賴以解決上述問題的方法，是利用擴散膜或擴散 板減少暗斑、提高光源的均勻性。 【新型内容】 本創作提供-射提壯ED發光均自度及肖度的雜構造，使LED更適合 M345352 作為直下式背光模組的光源。本創作之透鏡構造包括一上半鏡體及一下半鏡 體，其中下半鏡體係呈碗狀，並於led晶片的四周形成中空的狀態，藉以使原 本將朝側向逸散的、無法利用的光線經過二次折射，轉而朝向LED的有效出光 角度範圍，減少光的逸散和損失；上半鏡體與下半鏡係一體成型或相連，並 在其頂面形成一凹入的頂面，使經過此頂面的光線得以經過二次折射而適度 地往外疏散，從而得到一均勻的LED出光效果。 > 【實施方式】 如第2圖所示，依據本創作的透鏡構造實施例可包括一上半鏡體1〇及一下 半鏡體20 ;其下半鏡體2〇的底緣係連接於一LED晶片3〇的基板31，大致地呈 碗狀而有一連續曲面的内表面21，使LED晶片30產生的光線L1進入下半鏡體 20時偏向法線方向ni〇，離開下半鏡體2〇時偏離法線方向“1，使原本逸散無 用的光線經此二次折射後轉向LED的有效出光角度範圍。上半鏡體10與下半 鏡20可一體成型或相連，並在頂面形成一凹入的頂面丨丨(譬如為一錐狀的表 ί 面）’使光線L2從下半鏡體20的内表面21進入時偏向法線方向n2〇，離開上半 鏡體10的頂面11時偏離法線方向n2l，藉此可使led晶片30正面密集的光線乙2 向外圍疏散’從而得到有效出光角度大、出光均勻的led背光源。 如第3圖所示，本創作之下半鏡體20的内表面可變化實施為一錐面22，當 LED晶片30產生朝側向逸散的光線L3於進入下半鏡體2〇時偏向法線方向 n30，離開下半鏡體20時偏離法線方向心卜藉由二次折射使原本無用的光線 L3折向有效的出光角度範圍。此外，本實施例之上半鏡體1〇的頂面為一凹入 的連續曲面12，使光線L4、L5進入下半鏡體20時偏向法線n4〇、n50，而離開 5 M345352 上半鏡體_連續曲面12時偏離法線方向μ卜⑹，藉此疏散咖晶片％正 面密集的光線，使LED的出光角度大且均勻。 如第4圖所示，本創作的變化實施—包括使下半鏡體2q的内表面成為一截 錐狀的内表面23，而上半鏡體_頂面則為—凹人的錐面13。其中原本在直 下式背光模組無法利用的光進入下半鏡體2〇時朝靠近法線處的方向折 射離開下半鏡體20時朝偏離法線n61的方向折射，從而進入led有效的出光 .肖度範圍。又如光線L76進入下半鏡體20時朝靠近法線n70的方向折射，離開 • 下半鏡體20時朝偏離法線n71的方向折射，其中在上半鏡體10表面反射的光線 仍將進入LED有效的出光角度範圍而不致逸失。絲L8進入下半鏡體2〇時偏 向法線_，離開上半鏡體1〇的連續曲面12時偏離法線方向制，藉此疏散led 晶片30正面密集的光線，使led的出光角度因此變得大且均勻。 依據本創作，透鏡構造亦可如第5圖所示之變化實施例，使下半鏡體2〇的 内表面成為一錐狀的内表面22，而上半鏡體ΐα的頂面亦為一凹入的錐面14， 並且在上緣產生環狀的平面15，同樣有助於疏散LED晶片3〇正面密集的光 Φ 線，使LED的有效出光角度大且均勻。 如第6圖所示，下半鏡體20的内表面亦為一錐狀的内表面22，而上半鏡體 10的頂面亦為一凹入的錐面14。本實施例經TRACEPR0軟體模擬及實驗發 現，其LED照度平面圖如第7圖所示，燭光分析圖如第8圖所示，配光曲線圖如 第9圖所示，足見本創作之LED透鏡構造應用於LED，其出光特性兼具邊光型 LED及朗博型LED的優點，且發光角度已可達110度、均勻度達到53 2〇/〇。 綜上所述，本創作具有極佳的實用性、新穎性以及進步性，符合新型專 利之申請要件，依法倶文提出申請，懇請貴審查委員早日賜予專利。 M345352 【圖式簡單說明】 第1圖、係習知各種發光二極體(LED)的配光曲線圖。 第2圖、係-本創作之透鏡構造實施例。 第3圖、係-本創作之透鏡構造的變化實施例。 第4圖、係-本創作之透鏡構造的另一變化實施例。 第5圖、係-本創作之透鏡構造的又一變化實施例。 第6圖、係-本創作之透鏡構造的再一變化實施例。 第7圖、係一應用本創作之透鏡構造實施例的LED照度平面圖。 第8圖、係一應用本創作之透鏡構造實施例的LED燭光分析圖。 第9圖、係一應用本創作之透鏡構造實施例的LED配光曲線圖。 【主要元件符號說明】 10 上半鏡體 11 凹入的頂面 12 凹入的連續曲面 13 凹入的錐面 14 凹入的錐面 15 環狀的平面 20 下半鏡體 21 内表面 22 錐面 23 截錐面 30 led晶片 31 基板 L1 光線 L2 光線 L3 光線 L4 光線 L5 光線 L6 光線 L7 光線 L8 光線 nlO 法線方向 nil 法線方向 n20 法線方向 n21 法線方向 7 M345352 n30 法線方向 n31 法線方向 n40 法線方向 n41 法線方向 n50 法線方向 n51 法線方向 η60 法線方向 n61 法線方向 η70 法線方向 n71 法線方向 η80 法線方向 η81 法線方向M345352 VIII. New description: [New technical field] This is a kind of LED lens structure, especially a lens connected to the LED chip substrate, including a lower half mirror body and an upper half mirror body, which can not be used. The lateral light enters the effective light-emitting range of the LED through the secondary refraction, and the dense light in the middle can be appropriately dispersed to the side, thereby obtaining a larger light-emitting angle and better light-emitting uniformity. φ [Prior Art] With the increase in the size of LCD products, the higher the cost of backlight modules, the direct-lit backlight module has become a key technology for the production of large-size LCD products. When a high-power LED is used as a light source for a large-sized direct-lit backlight module, the first problem to be faced is that the light-emitting surface of the LED point source is difficult to be uniform. As shown in Fig. 1, currently available light-emitting diodes (LEDs) can be classified into four categories according to the light distribution curve: concentrating type, edge type, Lambertian type and batwing type. The light source used in the direct-lit backlight module is mainly _ Lambertian type and edge-light type. However, although the Lambertian type has the advantage of high uniformity, it has the shortcoming of the illuminating angle ‘small. Although the side light type has a large light-emitting angle, its light-emitting uniformity is too low, which causes a shortage of light in the intermediate portion. At present, the LED backlight module relies on the diffusion film or the diffusion plate to reduce dark spots and improve the uniformity of the light source. [New content] This creation provides the hybrid structure of the self-illumination and the Xiaodu of the ED illumination, making the LED more suitable for the M345352 as the light source of the direct-lit backlight module. The lens structure of the present invention comprises an upper half mirror body and a lower half mirror body, wherein the lower half mirror system is in the shape of a bowl and forms a hollow state around the led wafer, so that the original side will be dissipated laterally and cannot be utilized. The light is twice refracted, and instead is directed toward the effective light-emitting angle range of the LED, reducing the light's escape and loss; the upper half of the mirror body is integrally formed or connected with the lower mirror, and forms a concave top on the top surface thereof. The surface is such that the light passing through the top surface is moderately evacuated by secondary refraction, thereby obtaining a uniform LED light-emitting effect. [Embodiment] As shown in Fig. 2, the lens construction embodiment according to the present invention may include an upper half mirror body 1〇 and a lower half mirror body 20; the bottom edge of the lower half mirror body 2〇 is connected to The substrate 31 of an LED chip is substantially in the shape of a bowl and has a continuous curved inner surface 21, so that the light L1 generated by the LED chip 30 enters the lower half of the mirror body 20 and is biased toward the normal direction ni〇, leaving the lower half of the mirror body. 2〇 deviates from the normal direction “1, so that the originally useless light is diverted to the effective light-emitting angle range of the LED after the secondary refraction. The upper half mirror body 10 and the lower half mirror 20 can be integrally formed or connected, and are at the top. The face forms a concave top surface 丨丨 (e.g., a tapered surface). The light ray L2 is deflected from the inner surface 21 of the lower half mirror body 20 toward the normal direction n2 〇, leaving the upper half mirror body 10 The top surface 11 is offset from the normal direction n2l, thereby allowing the dense light of the front surface of the LED chip 30 to be evacuated to the periphery, thereby obtaining a LED backlight having an effective light-emitting angle and uniform light emission. As shown in FIG. The inner surface of the half mirror 20 can be modified to be implemented as a tapered surface 22 when the LED chip 30 is produced. The laterally scattered light L3 is biased toward the normal direction n30 when entering the lower half of the mirror body 2〇, and deviates from the normal direction when leaving the lower half of the mirror body 20, and the originally useless light L3 is folded to be effective by the secondary refraction. In addition, the top surface of the upper half mirror body 1〇 of the embodiment is a concave continuous curved surface 12, so that the light rays L4 and L5 enter the lower half mirror body 20 and are biased toward the normal lines n4〇, n50, and leave. 5 M345352 The upper half of the mirror _ continuous surface 12 deviates from the normal direction μ (6), thereby dispersing the front side dense light of the coffee wafer, so that the light exit angle of the LED is large and uniform. As shown in Fig. 4, the change of the creation The implementation includes: forming the inner surface of the lower half mirror body 2q into a truncated cone inner surface 23, and the upper mirror body _ top surface is a concave cone surface 13. The original backlight module cannot be utilized. When the light enters the lower half of the mirror body 2 折射, it is refracted away from the normal half of the mirror body 20 in the direction of approaching the normal line, and is refracted in the direction away from the normal line n61, thereby entering the effective light-emitting range of the LED. The lower half of the mirror 20 is refracted toward the normal n70, leaving the second half mirror At 20 o'clock, it is refracted away from the normal line n71, and the light reflected on the surface of the upper half of the mirror body 10 will still enter the effective light-emitting angle range of the LED without being lost. When the wire L8 enters the lower half of the mirror body 2, it is biased toward the normal _, When the continuous curved surface 12 of the first half of the mirror body 1 is deviated from the normal direction, the dense light of the front surface of the led wafer 30 is evacuated, so that the light exit angle of the LED is made large and uniform. According to the present invention, the lens structure can also be In the variant embodiment shown in Fig. 5, the inner surface of the lower half mirror body 2〇 is a tapered inner surface 22, and the top surface of the upper half mirror body ΐα is also a concave tapered surface 14, and The upper edge produces an annular plane 15, which also helps to evacuate the dense Φ line on the front side of the LED chip 3, so that the effective light-emitting angle of the LED is large and uniform. As shown in Fig. 6, the inner surface of the lower half mirror body 20 is also a tapered inner surface 22, and the top surface of the upper half mirror body 10 is also a concave tapered surface 14. In this embodiment, the TRACEPR0 software simulation and experiment found that the LED illumination plan is as shown in Fig. 7, the candlelight analysis chart is shown in Fig. 8, and the light distribution curve is shown in Fig. 9, which shows the LED lens structure of the present invention. Applied to LED, its light-emitting characteristics have the advantages of edge-light LED and Langbo LED, and the illumination angle can reach 110 degrees and the uniformity reaches 53 2〇/〇. In summary, this creation has excellent practicality, novelty and progressiveness. It meets the application requirements of the new patent, and applies for it according to law, and asks your review committee to give the patent as soon as possible. M345352 [Simple description of the drawing] Fig. 1 is a light distribution graph of various light-emitting diodes (LEDs). Fig. 2 is a view showing a lens construction example of the present invention. Fig. 3 is a diagram showing a variation of the lens configuration of the present invention. Fig. 4 is a view showing another modified embodiment of the lens configuration of the present invention. Fig. 5 is a further modified embodiment of the lens construction of the present invention. Fig. 6 is a further modified embodiment of the lens structure of the present invention. Fig. 7 is a plan view of an LED illuminance of a lens construction embodiment to which the present invention is applied. Fig. 8 is an LED candlelight analysis diagram of a lens construction embodiment to which the present invention is applied. Fig. 9 is a diagram showing an LED light distribution curve of a lens construction embodiment to which the present invention is applied. [Main component symbol description] 10 Upper half mirror body 11 concave top surface 12 concave continuous curved surface 13 concave tapered surface 14 concave tapered surface 15 annular flat surface 20 lower half mirror body 21 inner surface 22 cone Face 23 truncated cone 30 led wafer 31 substrate L1 light L2 light L3 light L4 light L5 light L6 light L7 light L8 light nlO normal direction nil normal direction n20 normal direction n21 normal direction 7 M345352 n30 normal direction n31 method Line direction n40 Normal direction n41 Normal direction n50 Normal direction n51 Normal direction η60 Normal direction n61 Normal direction η70 Normal direction n71 Normal direction η80 Normal direction η81 Normal direction