201011410 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種高準直面型光源模組及其出光方 法，尤指一種可將出光光場之半高全寬（FWHM，Full Width Half Maximum)度數大幅縮小’除具備高準直出光特性外， 亦可適用於現有背光模組製程技術進行生產製作之高準直 面型光源模組。 0 【先前技術】 按’液晶顯不之應用極為廣泛，包含手機、PDA、車 用顯示器、筆記型電腦、電腦螢幕以及液晶電視等。然而， TFT-LCD(薄膜電晶體-液晶）顯示器為非自發光型（non_ emission)顯示器，除控制晝面顯示之液晶面板外，需要外 加背光模組提供平面光源。至於傳統側光式背光模組係採 用導光板形成平面光源’主要構件除光源、導光板、反射 〇 片之外’通常另包括二片結構互相垂直的集光稜鏡片 (prism sheet)以及設置於該二集光稜鏡片上下兩面，將該 二集光稜鏡片夹設於其間之二擴散片（Diffuser)，該集光 棱鏡片通常簡稱 BEF(Brightness Enhancement Film)，其 作用在於限縮光限射出角度’使得大部份光線在正面視角 ±22〜25度射出’並將其餘光線回射再利用（reCyCiing)， 達到集光增亮效果’至於該擴散片則具有擴散勻光功能， 可減少亮度（輝度）不均勻性，並遮蔽光學缺陷（如雲彩紋 (Moir6 pattern))。然而，傳統液晶顯示器之光線利用率 201011410 僅6%〜10%，對筆記絮電腦而言’液晶顯示器所耗費之電量 約為30〜40%，如能改善光線利用率則能大幅延長電池使用 時間。 - 此外，傳統利用微透鏡聚光方式提高半穿反式 (transflective)背光源光線利用技術，或利用光栅繞射彩 色分光技術取代傳統染料吸收式彩色遽光片’以提升光線 利用率之技術，或採用柱狀透鏡膜片產生雙眼視覺錯位之 立體顯示技術（3D display) ’惟此類習知技術之共通需求 ❹在於高準直出光面蜜背光源，然而，傳統液晶顯示器背光 模組出光光場之半高全寬約為30〜50度，而習知可提供高 準直背光源之高準直背光源技術之結構則過於複雜且製程 困難，並不利於量產。 【發明内容】 有鑑於習知技術之缺失，本發明提出—種高準直面型 光源模組及其出光方法’可將出光光場之半高全寬（FWHM ’ ❹ Full Width Half Maximum)度數大幅縮小’除具備南準直 出光特性外，亦可適用於現有背光模組製释技術進行生產 製作。 為達到上述目的’本發明提出一種高準直面型光源模 組及其出光方法，其包含光源、一導光板、一光線發散角 度收斂膜片及一光線轉向導直膜片，於該導光板底面或頂 面、該收斂膜片出光面、該導直膜片入光面均設有微結構， 光源之光線由導光板側面射入該導光板後’光線經由該導 光板之微結構反射或折射導出該導光板進入該收斂膜片， 201011410 結構折射出該收敛臈片進人該導 微結構折射後，再由該導 為使貴審查委員對於本發明之姓播曰Μ 進-步之了解與認同，兹配合圖二功效有更 【實施方式】 訂將=_之圖絲料本發明騎成目的所使 β用的技術手段與功效’而以下圖式所列舉之實施例僅為輔 助說明’以w f審查委員瞭解，但本案之技術手段並不限 於所列舉圖式。 請參閲第一圖所示，本發明提供之高準直面型光源模 組，其主要包含至少一光源10、一導光板2〇、一收敛膜片 30及一導直膜片4〇。 該導光板20具有至少一侧面21、一底面22以及一頂 面23，該光源10係設置於該導光板20之側面21，該光源 ❹ 10可採用發光二極體（LED)或冷陰極管（CCFL)，該光源1〇 產生之光線L1由該導光板20之侧面21射入該導光板20。 該導光板2〇可為鏡面網點導光板、楔型導光板、喷砂霧化 導光板，或採用南散射光學穿透材料（Highly Scattering Optical Transmission Polymer ’ HSOT)之高角度出光導光 板。亦即以導光板20發光面法線A (正面視角）為0度， 而該導光板20在與法線A夾角為〜85度時射出光線強度 最高。於該導光板20底面22設有微結構24 ’請參閱第二 圖所示該導光板20實施例放大結構示意圖’該微結構24 201011410 具有一反射面241，該反射面241與該導光板2〇底面22(亦 即水平面）之夾角θ 1小於5度’光線L1經由該反射面241 反射形成反射光線L2 ’該反射光線L2再透過該導光板20 •頂面23形成折射光線L3射出該導光板20。 • 如第一圖所示’該導光板20底面22下方可設有一反 射片50,該反射片50可採用反射率98%以上之鍍銀高反射 率鏡面反射片，透過該反射片50可將由底面22射出之光 線反射至該導光板20内，再由頂面23射出，以提高光利 ❿ 用率。 請再參閱第一圖所示，該收斂膜片30係設置於該導光 板20之頂面23上方，該收斂膜片30可採用熱壓、UV硬 化成形等方式製作’該收斂膜片30與該導光板20之間具 有一定間距’該收斂膜片3〇具有一入光面31及一出光面 32，該入光面31係朝向該導光板20 ’於該出光® 32設有 微結構33’請參閱第三圖所示該收斂膜片30實施例放大 結構示意圖，該收斂臈片30之微結構33具有一主要光線 出射面331 ’該主要光線出射面331與該收敛膜片30法線 ® 力具有一夾角’1’相對於該主要光線出射面331、位於該 收斂膜片30法線六另一侧之非主要光線出射面332與該收 斂膜片30法線Α具有一夾角/ι，關於該收斂膜片30之設 計原則在於利用該夾角Τι、夾角A ’使得該收斂膜片30 内之傳遞光線L4可被控制由該主要光線出射面331射出， 避免該傳遞光線L4入射該非主要光線出射面332，以及避 免出射光線L5再度入射至相鄰微結構33而產生非預期之 出射光線。出射光線L5與該收斂膜片30法線A之夾角石1 f透過下列關係式求得： 201011410 η· sin(90°-r ι-α i)=sin(90°-r ι-/3 〇 其中， n為該收斂膜片3〇之折射率； ’ α 1為傳遞光線L4與該收斂膜片30法線Α之夾角。 * 以收斂膜片折射率為1.57、與收斂膜片3〇法線6之夾 角為75度光線L3入射為例，在膜片中傳遞的光線夾角α ι 約為38度，為了避免傳遞光線L4入射該非主要光線出射 面332 ’夾角/ι應該設計小於或等於度。然而，當夾角 _ Zl略大於38度時，例如增加2度，雖然光線發散角度有所 增加（4〜6度），但仍可保留一定的收斂特性。如收斂膜片 採用較低折射率（如1.49)的材料，則在膜片中傳遞的光線 夾角約為40度’則夾角/ι可以設計至42度。此外，為了 避免出射光線L5再度入射至相鄰微結構33而產生非預期 之出射光線，夾角/ι不能設計過小，最好能大於出射光線 夾角泠1。而出射光線夾角冷ι與夾角7 ι的設計值有關，大 炎角7 ι對應較大的夾角万1。當夾角7* ι大於度時，爽 角万ι大於48度，會導致光線入射至相鄰微結構33 ;當夾 ❹角7 ι小於40度時，夾角召ι小於30度，過小的夾角召！ 將導致光線轉向導直膜片設計上的困難，並產生非預期之 出射光線。因此，設計該主要光線出射面331與該收斂膜 片30法線Α之夾角7 i位於40〜70度之範圍。然而，當失 角/ι略小於夾角θ ι時，雖然會產生一些非預期之出射光 線’但其比例不大時’對光學效果不會有重大影響，則該 非主要光線出射面332與該收斂膜片30法線A之夾角/!位 於25〜42度之範圍。此外，由於過大之特徵尺寸將導致視 覺缺陷（如Mura ’顯示器亮度不均勻造成之痕跡）產生，而 11 201011410 過小之特徵尺寸將導致繞射效應而降低輝度，因此，該微 結構33 tfj度H1以位於10〜100/zm之範圍，且該微結構33 之間距（pitch)Pl以位於10〜100//m之範圍為佳。 . 請參閱第四圖，其顯示本發明收斂膜片之另一實施例 .放大結構示意圖，本實施例之收斂膜片30A係以第三圖實 施例為基礎，不同點在於該收斂膜片30A之入光面31亦設 有微結構34,該微結構34具有至少一主要光線入射面 341，該主要光線入射面341與該收斂膜片30A法線A夾角 /u位於75〜88度之範圍，相對於該主要光線入射面341、 ® 位於該收斂膜片30A法線六另一側之非主要光線入射面 342與該收斂膜片30A法線A夾角7 ία位於40~70度之範 圍；透過該微結構34之設置可辅助該折射光線L3進入該 收斂膜片30A，可調整折射光線L3的射出角度，並略為提 升折射光線L3之利用率。 請再參閱第一圖所示，該導直膜片40係設置於該收斂 膜片30上方’該導直膜片40可採用熱壓.、UV硬化成形等 方式製作’該導直膜片40與該收斂膜片30之間具有一定 ❿ 間距，該導直膜片40具有一入光面41及一出光面42 ’該 入光面41係朝向該收斂膜片30，且該入光面41設有微結 構43 ’請參閱第五圖所示該導直膜片40 —實施例之放大 結構示意圖，該導直膜片40之微結構43具有一光線入射 面431，該光線入射面431與該導直膜片40法線》具有一 夾角/2 ’相對於該光線入射面431、位於該導直膜片40法 線乃另一側為光線導正面432,該光線導正面432與該導直 膜片40法線A具有一夾角7 2，此外，α 2為出射光線L5 與該導直膜片40法線Α之夾角，該夾角α 2等於第三圖所 12 201011410 示該出射光線L5與該收斂膜片30法線A之夾角万1;同理， 該導直膜片40之設計原則在於利用該夾角/2及夾角72， 使得該導直膜片40内之傳遞光線L6可被控制由該光線入 射面431射入該導直膜片40後可被導正為導直光線L7射 出該導直膜片40，其設計關係式如下所示，201011410 IX. Description of the Invention: [Technical Field] The present invention relates to a high-collimation direct-surface light source module and a light-emitting method thereof, and more particularly to a full-width full width (FWHM) of a light-emitting field (FWHM) The degree is greatly reduced. In addition to the high-collimation light-emitting characteristics, it can also be applied to the existing backlight module process technology for the production of high-precision direct-surface light source modules. 0 [Prior Art] Press 'LCD' is widely used, including mobile phones, PDAs, car monitors, notebook computers, computer screens, and LCD TVs. However, the TFT-LCD (Thin Film Transistor-Liquid Crystal) display is a non-emission display. In addition to controlling the liquid crystal panel of the face display, an external backlight module is required to provide a planar light source. As for the conventional edge-lit backlight module, the light guide plate is used to form a planar light source. The main components are in addition to the light source, the light guide plate and the reflective slab, and usually include two prism sheets which are perpendicular to each other and disposed on the prism sheet. The two sets of light-receiving sheets are placed on the upper and lower sides, and the two light-collecting sheets are sandwiched between two diffusers (Diffuser). The light-collecting prism sheets are generally referred to as BEF (Brightness Enhancement Film), and the function is to limit the light-limited emission. The angle 'allows most of the light to be emitted at a frontal viewing angle of ±22 to 25 degrees' and the rest of the light is re-used (reCyCiing) to achieve a light-collecting effect. The diffuser has a diffused and uniform function to reduce brightness. (luminance) non-uniformity and masking optical defects (such as Moir6 pattern). However, the light utilization rate of the traditional liquid crystal display is only 6% to 10%, and for the notebook computer, the liquid power consumption of the liquid crystal display is about 30 to 40%. If the light utilization rate is improved, the battery life can be greatly extended. . - In addition, the traditional use of microlens concentrating to improve the transflective backlight light utilization technology, or the use of grating diffraction color spectroscopy technology to replace the traditional dye absorption color ray film 'to improve light utilization technology, Or use a cylindrical lens diaphragm to create a three-dimensional display technology (3D display) of the two eyes. 'The only common requirement of such a conventional technology lies in the high-precision straight-surface glossy backlight. However, the conventional liquid crystal display backlight module emits light. The full width at half maximum of the light field is about 30 to 50 degrees, and the structure of the high collimation backlight technology that can provide a high collimated backlight is too complicated and difficult to manufacture, which is not advantageous for mass production. SUMMARY OF THE INVENTION In view of the lack of the prior art, the present invention proposes a high-collimation direct-surface light source module and a light-emitting method thereof, which can greatly reduce the full width at half maximum (FWHM ' ❹ Full Width Half Maximum) of the light field. In addition to the south collimation light-emitting characteristics, it can also be applied to the production and production of existing backlight module release technology. In order to achieve the above object, the present invention provides a high-collimation direct-surface light source module and a light-emitting method thereof, comprising a light source, a light guide plate, a light divergence angle convergence film and a light-converting direct film on the bottom surface of the light guide plate. Or a top surface, the light exit surface of the aggregating diaphragm, and the light incident surface of the directing film are respectively provided with a microstructure, and the light of the light source is incident on the light guide plate by the side of the light guide plate, and the light is reflected or refracted through the microstructure of the light guide plate. Deriving the light guide plate into the aggregating diaphragm, and the 201011410 structure reflects the convergence of the converging cymbal into the refracting of the guiding microstructure, and then the guiding member makes the understanding of the surname of the present invention. It is agreed that there are more functions in conjunction with Figure 2. [Embodiment] The technical means and function of β for the purpose of riding the horse in the present invention are the same as those described in the following figures. The wf review committee understands, but the technical means of this case are not limited to the listed schema. Referring to the first figure, the present invention provides a high-collimation type light source module, which mainly comprises at least one light source 10, a light guide plate 2, an aggregating diaphragm 30 and a directing diaphragm 4A. The light guide plate 20 has at least one side surface 21, a bottom surface 22 and a top surface 23. The light source 10 is disposed on the side surface 21 of the light guide plate 20. The light source ❹ 10 can be a light emitting diode (LED) or a cold cathode tube. (CCFL), the light beam L1 generated by the light source 1 is incident on the light guide plate 20 from the side surface 21 of the light guide plate 20. The light guide plate 2 can be a mirror dot light guide plate, a wedge type light guide plate, a sandblasted atomized light guide plate, or a high angle light guide light guide plate using a Highly Scattering Optical Transmission Polymer (HSOT). That is, the normal A of the light-emitting surface of the light guide plate 20 (frontal viewing angle) is 0 degrees, and the light guide plate 20 has the highest intensity of light when it is at an angle of 85 degrees to the normal A. The bottom surface 22 of the light guide plate 20 is provided with a microstructure 24'. Please refer to the second embodiment of the light guide plate 20 for an enlarged schematic view of the embodiment. The microstructure 24 201011410 has a reflective surface 241, and the reflective surface 241 and the light guide plate 2 The angle θ 1 of the bottom surface 22 (ie, the horizontal plane) is less than 5 degrees. The light ray L1 is reflected by the reflecting surface 241 to form the reflected light L2. The reflected light L2 is transmitted through the light guide plate 20. The top surface 23 forms the refracted light L3 to emit the guide. Light board 20. • As shown in the first figure, a reflective sheet 50 may be disposed under the bottom surface 22 of the light guide plate 20. The reflective sheet 50 may be a silver plated high reflectivity specular reflection sheet having a reflectance of 98% or more, through which the reflective sheet 50 can be used. The light emitted from the bottom surface 22 is reflected into the light guide plate 20, and is then emitted from the top surface 23 to improve the light yield. Referring to the first figure, the aggregating diaphragm 30 is disposed above the top surface 23 of the light guide plate 20. The aggregating diaphragm 30 can be formed by hot pressing, UV hardening, or the like. The light-guiding plate 20 has a certain distance between the light-guiding plate 3 and the light-emitting surface 31, and the light-incident surface 31 is provided with a microstructure 33 toward the light-emitting plate 20'. 'Please refer to the enlarged schematic view of the embodiment of the aggregating diaphragm 30 shown in the third figure. The microstructure 33 of the converging diaphragm 30 has a main light exit surface 331 'the main light exit surface 331 and the asymmetrical diaphragm 30 normal. The force has an angle '1' with respect to the main light exit surface 331, and the non-primary light exit surface 332 on the other side of the normal line of the aggregating diaphragm 30 has an angle / ι with the aisotropic diaphragm 30 normal The design principle of the aggregating diaphragm 30 is that the angle Τι and the angle A′ are used to make the transmitted light L4 in the aggregating diaphragm 30 can be controlled to be emitted from the main light exit surface 331 to prevent the transmitted light L4 from entering the non-primary. Light exit surface 332, and avoid L5 is incident again to the light exit adjacent microstructures 33 have unintended exit of light. The exiting ray L5 and the angled stone 1 f of the normal line A of the aggregating diaphragm 30 are obtained by the following relation: 201011410 η· sin(90°-r ι-α i)=sin(90°-r ι-/3 〇 Where n is the refractive index of the astringent film 3〇; 'α 1 is the angle between the transmitted ray L4 and the normal enthalpy of the astringent film 30. * The refractive index of the astringent film is 1.57, and the asymmetry film 3 〇 method For example, the angle of the line 6 is 75 degrees of light L3 incident, and the angle of the light transmitted in the diaphragm is about 38 degrees. In order to avoid the transmission of light L4, the incident angle of the non-primary light exit surface 332' should be designed to be less than or equal to However, when the angle _ Zl is slightly larger than 38 degrees, for example, by 2 degrees, although the light divergence angle is increased (4 to 6 degrees), certain convergence characteristics can be retained. For example, the asymmetry diaphragm adopts a lower refractive index. For materials such as 1.49, the angle of the light transmitted in the diaphragm is about 40 degrees', then the angle / ι can be designed to 42 degrees. In addition, in order to avoid the incident light L5 re-incident to the adjacent microstructure 33, the unexpected The outgoing light, the angle / ι can not be designed too small, preferably greater than the angle of the outgoing light 泠 1. The angle of the exiting light is related to the design value of the angle of 7 ι, and the large angle of 7 ι corresponds to a larger angle of 1. When the angle 7* ι is greater than the degree, the angle of the angle is greater than 48 degrees, which causes the light to enter. Adjacent microstructures 33; when the clamping angle 7 ι is less than 40 degrees, the angle is less than 30 degrees, and the angle is too small! This will cause the light to turn into the direct diaphragm design and produce unexpected light. Therefore, the angle 7 i between the main light exit surface 331 and the normal line of the aggregating diaphragm 30 is designed to be in the range of 40 to 70 degrees. However, when the angle of loss / ι is slightly smaller than the angle θ ι, although some unexpected When the outgoing light 'but the proportion is not large' does not have a significant effect on the optical effect, the angle between the non-primary light exit surface 332 and the normal line A of the astringent film 30 is in the range of 25 to 42 degrees. Since the oversized feature size will result in visual defects (such as traces caused by uneven brightness of the Mura 'display), the feature size of 11 201011410 will cause a diffraction effect to reduce the luminance, so the microstructure 33 tfj degree H1 is located 10~100/zm The range, and the pitch P1 of the microstructure 33 is preferably in the range of 10 to 100 / / m. Please refer to the fourth figure, which shows another embodiment of the astringent film of the present invention. The ablation film 30A of the present embodiment is based on the third embodiment, except that the light incident surface 31 of the aggregating film 30A is also provided with a microstructure 34 having at least one main light incident surface 341. The angle between the main light incident surface 341 and the normal angle A of the aggregating diaphragm 30A is in the range of 75 to 88 degrees, and the main light incident surface 341, ® is located on the other side of the normal line of the asymmetrical diaphragm 30A. The angle between the non-primary light incident surface 342 and the normal angle A of the astringent film 30A is in the range of 40 to 70 degrees; the arrangement of the microstructure 34 can assist the refracted light L3 to enter the aggregating diaphragm 30A, and the refracted light can be adjusted. The angle of incidence of L3, and slightly improve the utilization of refracted light L3. Referring to the first figure, the directing film 40 is disposed above the astringent film 30. The directing film 40 can be formed by hot pressing, UV hardening, or the like. The abutting film 40 has a ❿ spacing, and the guiding film 40 has a light incident surface 41 and a light exiting surface 42 ′. The light incident surface 41 faces the astringent film 30, and the light incident surface 41 A microstructure 43 is provided. Please refer to the enlarged structure of the directing diaphragm 40 shown in the fifth embodiment. The microstructure 43 of the directing diaphragm 40 has a light incident surface 431, and the light incident surface 431 is The straight line of the directing diaphragm 40 has an angle /2' with respect to the light incident surface 431, the normal line of the directing diaphragm 40 is the light guiding front surface 432, and the light guiding front surface 432 and the guide The straight line 40 normal A has an angle of 7 2, and further, α 2 is the angle between the outgoing light L5 and the normal line of the directing film 40, and the angle α 2 is equal to the third figure 12 201011410 showing the outgoing light L5 The angle of the asymmetry diaphragm 30 is substantially 1; similarly, the guiding principle of the guiding film 40 is to use the angle /2 and the angle 7 2, the transmission light L6 in the directivity film 40 can be controlled to be emitted from the light incident surface 431 into the directivity film 40, and then can be guided into the direct light L7 to emit the directivity film 40, The design relationship is as follows,
sm(90° -a2 -l2) η )+h) 其中，η為該導直膜片40之折射率。顯示或照明應用之最 強亮度並不一定要求在正面視角，而是視需求而調整，如 果要讓最強亮度在正面視角±10度内，則其設計關係式如 下所示， .^,0 1 , . _! ,sin(90°-or,^ .O〇 1 , . _! ,sin(90° -a2-L).,、 42°--(sm -2^-) + /2)<r2 <48°--(sm \ ^?~~—) + /2) 2 η 2 η 為了讓入射光線能有效入射至光線導正面432，以防 止非預期射出光線的產生，該光線入射面431與導直膜片 40法線及之夾角/2最好能小於26度，且隨著/2角度的縮 小，非預期射出光線的防止效果越佳。但考慮模仁加工的 ❹ 排屑問題與成形時的拔模角設計，/2需在1度以上，綜合 上述考量，可設計出該光線入射面431與導直膜片40法線 w之夾角/2位於1〜26度之範圍。而由於/2設計值位於1~26 度，高分子材料折射率通常在1.4〜1.6範圍，且<22設計在 25〜50度範圍，根據上式可以整理出該光線導正面432與 導直膜片40法線Α之夾角Τ 2位於25〜35度之範圍。導直 膜片40之微結構的高度與間距設計與收斂膜月30之考量 相同，該微結構43高度H2位於10〜100/zm之範圍，且該 微結構43之間距（pitch)P2位於10~ 100 /z m之範圍。 13 201011410 請參閱第六圖所示本發明之導直膜片另一實施例放大 結構示意圖，該導直膜片40Α具有複數微結構43Α，該微 結構43Α具有一定間距ΡΑ，於該微結構43Α於靠近該出光 面42Α之一側形成尺寸不一之平邊fP、fpi，其中，該較Sm (90° - a2 - l2) η ) + h) where η is the refractive index of the directivity film 40. The strongest brightness of the display or lighting application does not necessarily need to be in the front view, but is adjusted according to the needs. If the strongest brightness is within ±10 degrees of the front view, the design relationship is as follows, .^, 0 1 , . _! , sin(90°-or, ^ .O〇1 , . _! , sin(90° -a2-L).,, 42°--(sm -2^-) + /2)< R2 <48°--(sm \ ^?~~—) + /2) 2 η 2 η In order to allow incident light to be efficiently incident on the front surface 432 of the light guide to prevent the generation of unintended emitted light, the incident surface of the light The angle between the 431 and the straight line of the directing film 40 is preferably less than 26 degrees, and as the angle of /2 is reduced, the prevention effect of the unintended emitted light is better. However, considering the 排 chip removal problem of the mold core processing and the draft angle design during forming, /2 needs to be above 1 degree. Based on the above considerations, the angle between the light incident surface 431 and the normal line of the directing diaphragm 40 can be designed. /2 is located in the range of 1 to 26 degrees. Since the /2 design value is located at 1 to 26 degrees, the refractive index of the polymer material is usually in the range of 1.4 to 1.6, and the <22 design is in the range of 25 to 50 degrees. According to the above formula, the front surface 432 and the light guiding surface can be arranged. The angle 法 2 of the normal 40 of the diaphragm 40 is in the range of 25 to 35 degrees. The height and pitch design of the microstructure of the directivity film 40 is the same as that of the convergence film 30, the height H2 of the microstructure 43 is in the range of 10 to 100/zm, and the pitch P2 of the microstructure 43 is located at 10 ~ 100 / zm range. 13 201011410 Please refer to the enlarged structure of another embodiment of the directing film of the present invention shown in the sixth figure. The directing film 40A has a plurality of microstructures 43Α, and the microstructure 43Α has a certain pitch ΡΑ, and the microstructure 43Α Forming a flat edge fP, fpi of a size different from one side of the light exiting surface 42Α, wherein the comparison
大尺寸之平邊fPl導致出射光線L5A於進入該導直膜片40A 時，無法射入該微結構43A之光線入射面431A，而是由該 平邊fPl進入該導直膜片40A，使得射出光線L7A呈現歪 斜狀態’也導致該導直膜片40A產生非預期輝度峰，嚴重 ΟThe large-sized flat edge fP1 causes the outgoing light L5A to enter the light incident surface 431A of the microstructure 43A when entering the directing film 40A, but enters the directing film 40A from the flat edge fP1, so that the outgoing light is emitted. The light L7A exhibits a skewed state' also causes the directing diaphragm 40A to produce an unexpected luminance peak, which is severely flawed.
降低正面視角輝度’而至於該尺寸較小之平邊fp，則可避 免出射光線L5B由平邊處射入導直膜片40A產生非預期輝 度峰，本實施例在於說明，本發明之導直膜片容許一定之 ，作加工或成型精度誤差。以α2為50度，/2為5度，材 料折射率1. 57，Τ 2為31. 8度為例，當平邊與間距之長度 符合下列關係式：The front view luminance is reduced, and the flat edge fp of the smaller size can prevent the emitted light L5B from being incident on the directing film 40A from the flat side to generate an unexpected luminance peak. This embodiment is to explain the direct guiding of the present invention. The diaphragm is allowed to be fixed for processing or molding accuracy errors. Taking α2 as 50 degrees, /2 as 5 degrees, the material refractive index of 1.57, Τ 2 is 31. 8 degrees as an example, when the length of the flat side and the pitch meet the following relationship:
fP<=0. 2PAfP<=0. 2PA
莫吉免平邊fP對輝度產生影響。當fP>0.2PA時，該 的增加而：期輝度峰，且正面視角輝度隨著fP 疋要小於或等於G.2PA，假如實_用上可以允 π範圍以應用需求=度峰J❹可以大於0·2ΡΑ，實際 本例中僅舉“平邊缺陷'預容許程度決定。此外， 由曲面或是不，這些缺陷也可能是自 陷處，或是射到轨圖中未出）’只要光線不會射至缺 預期輝度峰的產生的光線關不高，祕減少或避免非 >閱第七圖所不本發明之收斂祺片3〇與導直膜片 201011410 4〇特徵角度值之對應_表，其絲 導直膜片40採用折射率A 敢膜片川” 斂膜K训盥道古珩羊為h5?材科，並根據上述該收 ⑽數值苴中：片4〇之設計關係式所計算出之十項驗 i值。，、中，第七圖該對應關係表所 2’係為導直光線L7盘導言㈣㈣A + 3L®，/、直膜片 線”之夾角（可參考第 夫光線L7與法線錢乎平行，因此第五圖 該特徵角度心）’由第七圖之對應關係表可知， ^本發明所設計之收斂膜片與導直膜片特徵角度，該失 角心主可趨近於零’亦即可將輝度♦調整至正面視角方向。 請參閱第八圖所示本發明與不同架構背光模組之發光 強度-視角模擬關係圖，將強度除以視角的餘弦函數即可得 到輝度’在此為了將僅有導光板的發光雜-起比較，故 以強度分布取代常見的輝度分布。本發明的高準直光源模 ^包含光源、-導光板一鏡面底反射片、—收斂膜片'與 一導直膜片A ;而習知模組（逆棱鏡架構）則包含光源、」 導光板、-鏡面底反射片與—導直膜片B。較意發明 ❹ 之收斂膜片除了會讓光線發散角度變小外，也會改變入射 至導直膜片的強度峰（輝度峰）角度，為了能將^終射出光 線導向正面視角，導直膜片A與導直膜片3的結^並不相 同。請參閱第八圖所示，其中’曲線81代表僅有導光板的 強度曲線，亦即未設置收斂膜片與導直臈片A之強度曲 線，曲線82代表導光板加設收斂膜片之強度曲線，二線 83代表導光板加設收斂膜片與導直膜片a之強度曲線，亦 即如第一圖所示本發明之架構，至於曲線84則^表導光^ 加設導直膜片B但未加收斂膜片之輝度曲線。如曲線犯與 曲線84顯示，當採用本發明之高準直面型光源模組架構 15 201011410 時，其強度峰（輝度峰）角度的半高寬（FWHM)可以縮小到3 度，而採用傳統導直膜片B的FWHM則在10度附近。由於 光線集中在小角度範圍射出，本發明可大幅提升正面視角 * 強度（輝度），提供一高準直出光之光源模組。 •請再參閱第一圖，综合上述本發明所提供之高準直面 型光源模組架構，可歸納出高準直面型光源模組之出光方 法，包含： 一、由至少一光源10提供光線L1; 0 二、光線L1由一導光板20侧面21進入導光板20，於該 導光板20底面22設有微結構24，光線L1經由該導 光板20底面22微結構24反射後，再由該導光板20 頂面23射出該導光板20 ; 三、 由該導光板20射出之光線L3進入收斂膜片30，該收 斂膜片30之出光面32.設有微結構33，光線L3經由 該收斂膜片30出光面32之微結構33折射後，再射出 該收斂膜片30 ; 四、 由該收斂膜片30射出之光線L5進入導直膜片40，該 參 導直膜片40之入光面41設有微結構43，光線L5經 由該導直膜片40入光面41之微結構43折射後，再形 成導直光線L7射出該導直膜片40。 綜上所述可知，本發明所提出之高準直面型光源模 組，藉由收斂膜片搭配導直膜片，不僅具備高準直出光特 性，更可控制出光光場之半高全寬縮小至3〜15度之範圍， 同時可套用於現有背光模組製程技術進行生產製作，適用 於各種液晶顯示器裝置相關產業，包括手機、PDA、車用顯 示器、筆記型電腦、電腦螢幕、液晶電視及防窺視顯示器 16 201011410 等，以及各種照明裝置。 惟以上所述者，僅為本發明之實施例而已，當不能以 之限定本發明所實施之範圍。即大凡依本發明申請專利範 圍所作之均等變化與修飾，皆應仍屬於本發明專利涵蓋之 範圍内，謹請貴審查委員明鑑，並祈惠准，是所至禱。 【圈式簡單說明】 第一圖係本發明之高準直面型光源模組實施例之結構 ❹ 示意圖。 第二圖係本發明導光板實施例放大結構示意圖。 第三圖係本發明收斂膜片實施例放大結構示意圖。 第四圖係本發明收斂膜片另一實施例放大結構示意 圖， 第五圖係本發明導直膜片實施例放大結構示意圖。 第六圖係本發明導直膜片另一實施例放大結構示意 圖。 第七圖係本發明收斂膜片與導直膜片特徵角度值之對 ❿應關絲。 第八圖係本發明與不同架構背光模組之輝度模擬關係 圖。 【主要元件符號說明】 1 〇 -光源 20-導光板 21-側面 17 201011410 22- 底面 23- 頂面 24- 微結構 241-反射面 » 30、30A-收斂膜片 31- 入光面 32- 出光面 33- 微結構 _ 331-主要光線出射面 332-非主要光線出射面 3 4-微結構 341- 主要光線入射面 342- 非主要光線入射面 40、40A-導直膜片 41- 入光面 42- 出光面 φ 43、43A-微結構 431、431A-光線入射面 432-光線導正面 50-反射片 81〜8 4 -輝度曲線 η -法線 fP、fPl-平邊 HI、H2-高度 L1-光源產生之光線 201011410 L2_反射光線 L3-折射光線 L4、L6-傳遞光線 ‘ L5、L5A、L5B-出射光線 • L7-導直光線 L7A-射出光線 PI、P2、PA-間距 、lu、h、Οί\、β\、Ci2 θ 卜 r 1、r U、r 2、/ι 參 2-夾角Moji Free Edge fP has an effect on the brightness. When fP>0.2PA, the increase is: the luminance peak, and the positive viewing angle luminance is less than or equal to G.2PA with fP ,, if the real _ can be used to allow the π range to apply the demand = degree peak J ❹ can be greater than 0·2ΡΑ, in this case, only the “flat-side defect” pre-admission degree is determined. In addition, from the surface or not, these defects may also be trapped or not projected in the rail map. The light that does not hit the expected luminance peak is not high, and the secret reduction or avoidance is not the same as the characteristic angle value of the convergence film 3〇 of the present invention and the direct film 201011410 4〇 _ table, the wire guide straight film 40 uses the refractive index A Dare film Chuan" 敛 K K K K 珩 珩 珩 珩 珩 珩 h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h The ten test values calculated by the formula. , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Therefore, the characteristic angle of the fifth figure is described by the correspondence table of the seventh figure. According to the characteristic angle of the asymmetrical diaphragm and the directing diaphragm designed by the present invention, the lost-angle core can approach zero'. The brightness ♦ can be adjusted to the front viewing angle direction. Please refer to the luminous intensity-viewing angle simulation relationship between the present invention and the backlight module of different architectures shown in the eighth figure, and the intensity can be obtained by dividing the intensity by the cosine function of the viewing angle. Only the light-emitting of the light guide plate is compared, so the intensity distribution is substituted for the common luminance distribution. The high-collimation light source module of the present invention comprises a light source, a light guide plate, a mirror bottom reflection sheet, a convergence film and a The straight film A is used; the conventional module (inverse prism structure) includes a light source, a light guide plate, a mirror bottom reflection sheet, and a direct film B. In addition to the narrowing of the light divergence angle, the asymmetry diaphragm of the invention also changes the intensity peak (luminance peak) angle incident on the directing diaphragm. In order to direct the final light to the front viewing angle, the directing film The sheet A is not the same as the junction of the straight film 3. Please refer to the eighth figure, where 'curve 81 represents the intensity curve of only the light guide plate, that is, the intensity curve of the asymmetrical diaphragm and the straight guide piece A is not set, and the curve 82 represents the strength of the light guide plate with the asymmetrical diaphragm. Curve, the second line 83 represents the intensity curve of the light guide plate with the aggregating diaphragm and the directing diaphragm a, that is, the structure of the present invention as shown in the first figure, and the curve 84 is used to guide the light and the directing film is added. Sheet B but without the brightness curve of the astringent patch. As shown by the curve and curve 84, when the high-collimation light source module architecture 15 201011410 of the present invention is used, the full width at half maximum (FWHM) of the intensity peak (luminance peak) angle can be reduced to 3 degrees, and the conventional guide is used. The FWHM of the straight diaphragm B is around 10 degrees. Since the light is concentrated in a small angle range, the present invention can greatly enhance the front view* intensity (luminance) and provide a high-collimation light source module. Please refer to the first figure, which integrates the high-collimation direct-type light source module architecture provided by the present invention, and can summarize the light-emitting method of the high-precision direct-surface light source module, comprising: 1. providing light L1 by at least one light source 10. 0, the light L1 enters the light guide plate 20 from the side 21 of the light guide plate 20, and the bottom surface 22 of the light guide plate 20 is provided with a microstructure 24, and the light L1 is reflected by the bottom surface 22 of the light guide plate 20, and then guided by the guide The light guide plate 20 emits the light guide plate 20; the light beam L3 emitted from the light guide plate 20 enters the aggregating diaphragm 30, and the light exit surface 32 of the astringent diaphragm 30 is provided with a microstructure 33 through which the light ray L3 passes. After the microstructure 33 of the light-emitting surface 32 of the sheet 30 is refracted, the astringent film 30 is again emitted. 4. The light L5 emitted from the astringent film 30 enters the straight film 40, and the light-incident surface of the direct film 40 41 is provided with a microstructure 43, and the light L5 is refracted by the microstructure 43 of the light incident surface 41 of the directivity film 40, and then the direct light L7 is formed to emit the directivity film 40. In summary, the high-collimation surface light source module of the present invention not only has a high collimated light output characteristic but also has a half-height full width of the light field to be reduced to 3 by using a converging diaphragm and a directing diaphragm. ～15 degree range, can be used in the production of existing backlight module process technology, suitable for various LCD display device related industries, including mobile phones, PDAs, car monitors, notebook computers, computer screens, LCD TVs and peep-proof Display 16 201011410, etc., as well as various lighting devices. However, the above description is only for the embodiments of the present invention, and the scope of the invention is not limited thereto. That is to say, the equivalent changes and modifications made by the applicant in accordance with the scope of application of the present invention should still fall within the scope covered by the patent of the present invention. I would like to ask your reviewing committee to give a clear understanding and pray for it. [Brief Description] The first figure is a schematic diagram of the structure of the embodiment of the high-collimation type light source module of the present invention. The second figure is an enlarged schematic view of an embodiment of the light guide plate of the present invention. The third figure is an enlarged schematic view of an embodiment of the astringent film of the present invention. The fourth drawing is a schematic enlarged view of another embodiment of the astringent film of the present invention, and the fifth drawing is an enlarged schematic view of the embodiment of the directing film of the present invention. Fig. 6 is a schematic enlarged view showing another embodiment of the directing film of the present invention. The seventh figure is the pair of characteristic angle values of the astringent film and the directing film of the present invention. The eighth figure is a graph showing the luminance simulation relationship between the present invention and the backlight modules of different architectures. [Main component symbol description] 1 〇-light source 20-light guide plate 21-side 17 201011410 22- bottom surface 23- top surface 24- microstructure 241-reflecting surface» 30, 30A-aggregating diaphragm 31- light-incident surface 32- light-emitting Face 33 - Microstructure _ 331 - Main light exit surface 332 - Non-primary light exit surface 3 4-Microstructure 341 - Main light incident surface 342 - Non-primary light incident surface 40, 40A - Direct diaphragm 41 - Light entrance surface 42- Light-emitting surface φ 43, 43A - Microstructure 431, 431A - Light incident surface 432 - Light guide front 50 - Reflector 81 ~ 8 4 - Brightness curve η - Normal fP, fPl - Flat HI, H2-H1 - Light generated by the light source 201011410 L2_Reflected light L3-Refracted light L4, L6-Transmitted light 'L5, L5A, L5B-Outward light · L7-Direct light L7A-Emitted light PI, P2, PA-spacing, lu, h , Οί\, β\, Ci2 θ 卜 r 1 , r U, r 2, /ι 参2-angle
1919