1325480 -九、發明說明： -【發明所屬之技術領域】 本發明涉及一種光罩，特別涉及一種具較佳光利用效 率及光均勻度之光罩，進一步地，本發明涉及一種採用該 光罩之照明裝置。 【先如技術】 目鈾’發光二極體（Light Emitting Diode, LED)因具光 質佳（亦即LED光源射出之光譜）及發光效率高等特性而逐 漸取代冷陰極營光燈（C〇id Cathode Fluorescent Lamp， CCFL)作為照明裝置之發光元件，具體可參閱Michael S. Shur 等人於文獻 Proceedings of the IEEE，Vol. 93, No. 10 (2005 年 l〇 月）中發表之 “Solid-State Lighting: Toward1325480 - IX. Description of the Invention: - Technical Field of the Invention The present invention relates to a reticle, and more particularly to a reticle having better light utilization efficiency and light uniformity. Further, the present invention relates to the use of the reticle Lighting device. [Before technology] The light illuminating Diode (LED) is gradually replacing the cold cathode camplight because of its good light quality (that is, the spectrum emitted by the LED light source) and high luminous efficiency (C〇id Cathode Fluorescent Lamp, CCFL) is used as a lighting element for lighting devices. For details, see "Solid-State" by Michael S. Shur et al., Proceedings of the IEEE, Vol. 93, No. 10 (2005). Lighting: Toward
Superior Illumination”一文。 對於先前採用發光二極體作為發光元件之照明裝置， 其通常具有近似圓對稱之光場（如圖1所示），該等光場之中 心光強度較強’由中心向四周擴散之區域光強度逐漸變 弱’而實際中並不總需要此類型之光場。例如，對於路燈 而言’由於通常之道路皆為長條狀，故其希望可得到長條 狀光強度分佈均勻之光場以提高路燈所發出光線之利用 效率’惟’對於光場為近似圓對稱之路燈而言，由於其輻 射範圍與道路之形狀不符，且其光場之光強度分佈不均 句’故採用該路燈無法獲得較佳之光利用效率及光均勻度。 有#於此’有必要提供一種具較佳光利用效率及光均 勻度之光罩及採用該光罩之照明裝置。 6 【發明内容】 .以下將以實施例說明— 置’其具較佳㈣用效率及光均㈣料罩之照明袭 鏡單:===== 二鏡單每個透 先面及該出光面令至少_者^^相對之出光面，該入 凹面用於擴展紐沿與第_^ 丨岐伸之凹面’該 之輕射範圍，且至少丄：預定夹角之第二方向 +丄 透鏡早兀之凹面配置至少一、VL筮一 方向延伸之條狀微結構。 °弟 一種照明裝置，包括至少一 一 口 L光源’用於發射光； 罩，/…、至少一固態光源相 陣列排布之透鏡單元，每㈣^包括複數 母個透鏡早兀包括一入光面及一與 二面相對之出光面，該入光面及該出光面中至少一者 為b第—方向延伸之凹面’該凹面用於擴展光線沿盥第一 ^向成-預定夾角之第二方向之輕射範圍，且至少一透鏡 單元之凹面配置至少_沿第—方向延伸之條狀微結構。 、相對於先前技術，該光罩及照明裝置藉由設置具有一 光面與出光面之透鏡單元，以及將該入光面及該出光 中至者5又置為沿第一方向延伸之凹面，並進一步於 該凹面配置至少一沿第一方向延伸之條狀微結構，可使得 至少一固態光源於第二方向上之輻射範圍大在於第一方向 上之II射範圍’並使至少一固態光源產生之光場之光強度 均句化’從而提高至少一固態光源之光利用效率及光均勻 度。 1325480 •【實施方式】 下面結合圖式對本發明作進一步之詳細說明。 凊參閱® 2 ’本發明第一實施例提供之光i 10，其包 括複數陣列排布之透鏡單元n。 〃 請一起參閱圖3，每個透鏡單元11包括一入光面110 j-出光面112。該入光面11〇為一凹面，該出光面為 -凸面。本實施例t，該凹面具體設置為沿X方向延伸之 柱狀凹面’該凸面具體設置為沿γ方向延伸之柱狀凸面， 該X方向與該γ方向成一預定夾角（未標示）。 置至：透鏡單元11中’至少一透鏡單元11之凹面配 公一沿X方向延伸之條狀微結構ln。可理 數透鏡單70 11可拼合組成，其亦可為—體結構。以 請進—步參閱圖4,本實施例中，該至少一透鏡 ^之凹面所配置之條狀微結構m，其沿垂直於χ方向之 頁截面形狀為三角形，即該條狀微結構m為-個三角錐 开》條狀凸起。當麸，詨條壯料姓 ^ 5 . …、β條狀微、，·。構111亦可定義為由凹面 置㈣以U㈣設之條狀凹槽。如圖5所示，配 條心:早凡11凹面上之條狀微結構111為一個三角錐形 /、狀凹槽，其截面形狀亦為一個三角形。 狀微：Γ圖6至圖8’該至少一透鏡單元11上配置之條 所構111之形狀還可根據需要作出適當變更。如圖6 條狀微結構m之截面形以， 不，該條狀微結構ln之截面形狀 叮 微結構m之截面开梯形。當然’該條狀 开乂狀亦可為則迷三角形、圓弧形、梯形 8 1325480 等之任意組合，如圖8中示出之圓弧形與三角形之組合。 請參閱圖9，本發明第二實施例提供之照明裝置40， '其採用前述之光罩對光源產生之光場作調整。該照明裝置 40包括至少一固態光源’如至少一 LED光源41等’及一 本發明第一實施例提供之光罩1〇。該至少一 LED光源41 與該光罩10相對設置。工作時，至少一 LED光源41所發 出之光線經由光罩10之入光面110入射至透鏡單元11内， 進而由透鏡單元11之出光面112出射。 * 本實施例中，至少一 LED光源41之數目設置為複數， 且該複數LED光源41分別相對光罩10中之複數透鏡單元 11設置。進一步地，該照明裝置40還包括一反射板42。 該反射板42包括複數沿Y方向延伸且沿X方向平行排列 之梯形凹槽420，該複數LED光源41藉由與其對應之複數 電路板410設置於該複數梯形凹槽420之底部且形成複數 線性LED光源陣列。該梯形凹槽420之側壁422形成有反 春射膜以反射至少一 LED光源41發出之光線。"Ultra Illumination". For lighting devices that previously used light-emitting diodes as light-emitting elements, they usually have a light field that is approximately circularly symmetric (as shown in Figure 1), and the center of the light fields is stronger. The light intensity in the surrounding area is gradually weakened. In practice, this type of light field is not always needed. For example, for street lamps, 'because the usual roads are long strips, it is hoped that long strip light intensity can be obtained. The evenly distributed light field is used to improve the utilization efficiency of the light emitted by the street lamp. 'Only for the street lamp whose light field is approximately circularly symmetrical, the radiation range is inconsistent with the shape of the road, and the light intensity distribution of the light field is not uniform. 'Therefore, the street light can not achieve better light utilization efficiency and light uniformity. It is necessary to provide a light mask with better light utilization efficiency and light uniformity and a lighting device using the same. 6 [ SUMMARY OF THE INVENTION The following will be explained by way of example - the illumination efficiency of the (four) efficiency and the light (4) material cover mirror: ===== two mirrors each of the transparent surface and the light surface At least _^^^ relative to the illuminating surface, the concave surface is used to expand the radiance of the ridge and the concave surface of the _^ 丨岐, and at least 丄: the second direction of the predetermined angle + the 兀 lens is early The concave surface is configured with at least one strip-shaped microstructure extending in a direction of VL 。. A lighting device comprising at least one-port L light source 'for emitting light; a cover, /..., at least one solid-state light source phase array lens The unit, each (four)^ includes a plurality of mother lenses, including a light incident surface and a light exit surface opposite to the two surfaces, and at least one of the light incident surface and the light exit surface is a concave surface of the b-direction extending from the concave surface And a light-emitting range for expanding the second direction of the light along the first direction to the predetermined angle, and the concave surface of the at least one lens unit is disposed at least—a strip-shaped microstructure extending along the first direction. Compared with the prior art, The reticle and the illuminating device are provided with a lens unit having a light surface and a light-emitting surface, and the light-incident surface and the light-emitting surface 5 are further disposed as a concave surface extending in the first direction, and further configured on the concave surface At least one extending in the first direction Extending the strip-like microstructure such that the range of radiation of the at least one solid-state light source in the second direction is greater than the range II of the first direction and the light intensity of the light field generated by the at least one solid-state light source is increased. The light utilization efficiency and the light uniformity of at least one solid-state light source. 1325480 • [Embodiment] The present invention will be further described in detail below with reference to the drawings. ® ® 2 2 The light i 10 provided by the first embodiment of the present invention includes The lens unit n arranged in a plurality of arrays 〃 Referring to FIG. 3 together, each lens unit 11 includes a light incident surface 110 j - a light exit surface 112. The light incident surface 11 is a concave surface, and the light exit surface is a convex surface. In the embodiment t, the concave surface is specifically disposed as a columnar concave surface extending in the X direction. The convex surface is specifically disposed as a columnar convex surface extending in the γ direction, and the X direction is at a predetermined angle (not shown) with the γ direction. The concave portion of at least one lens unit 11 in the lens unit 11 is assigned a strip-shaped microstructure ln extending in the X direction. The disposable lens unit 70 11 can be assembled in a single piece, which can also be a body structure. Referring to FIG. 4, in the embodiment, the strip-shaped microstructure m disposed on the concave surface of the at least one lens is triangular in a cross-sectional shape perpendicular to the χ direction, that is, the strip-shaped microstructure m For a - triangular cone open" strip-shaped bulge. When the bran, the sturdy surname ^ 5 . ..., β strip micro, , ·. The structure 111 can also be defined as a strip-shaped recess formed by a concave surface (four) with U (four). As shown in Fig. 5, the strip core: the strip-shaped microstructure 111 on the concave surface of the 11th is a triangular pyramid-shaped groove, and its cross-sectional shape is also a triangle. The shape of the strip 111 disposed on the at least one lens unit 11 can be appropriately changed as needed. As shown in Fig. 6, the strip-shaped microstructure m has a cross-sectional shape, no, the strip-shaped microstructure ln has a cross-sectional shape 叮 The microstructure m has a trapezoidal cross section. Of course, the strip-shaped opening may also be any combination of a triangular shape, a circular arc shape, a trapezoidal shape 8 1325480, and the like, as shown in FIG. Referring to FIG. 9, a lighting device 40 according to a second embodiment of the present invention is configured to adjust a light field generated by a light source by using the foregoing photomask. The illuminating device 40 includes at least one solid state light source 'such as at least one LED light source 41, etc.' and a reticle 1 提供 provided by the first embodiment of the present invention. The at least one LED light source 41 is disposed opposite the photomask 10. During operation, at least one of the light emitted by the LED light source 41 enters the lens unit 11 through the light incident surface 110 of the mask 10, and is further emitted by the light exit surface 112 of the lens unit 11. In the present embodiment, the number of at least one LED light source 41 is set to a plurality, and the plurality of LED light sources 41 are respectively disposed opposite to the plurality of lens units 11 in the reticle 10. Further, the illumination device 40 further includes a reflector 42. The reflector 42 includes a plurality of trapezoidal recesses 420 extending in the Y direction and arranged in parallel along the X direction. The plurality of LED light sources 41 are disposed at the bottom of the plurality of trapezoidal recesses 420 and form a complex linearity by a plurality of circuit boards 410 corresponding thereto. LED light source array. The sidewall 422 of the trapezoidal recess 420 is formed with an anti-spring film to reflect the light emitted by at least one of the LED light sources 41.
請參閱圖10，本實施例中，該每一 LED光源陣列配置 十七個沿Y方向線性分佈之LED光源（圖10中僅示出代表 性之三個），且該十七個LED光源分為一第一 LED光源組、 一第二LED光源組及一第三LED光源組。該第一 LED光 源組包括六個LED光源，且該六個LED光源所對應之透鏡 單元11沒有配置條狀微結構111。該第二LED光源組包括 三個LED光源，且該三個LED光源所對應之透鏡單元11 配置三個條狀微結構111。該第三LED光源組包括八個LED 9 ^^5480 光源’且H LED光源所對應之透鏡單元u配置五個條 狀微結構。 x' 該透鏡单7G 11上之凹面用於擴展至少—LEd光源 發出之光線沿Y方向之輕射範圍。具體地，該凹面可使入 射到其上之光線於Y方向上產生輻射狀偏轉’即由凹面之 底部向該凹面較高之兩端偏轉，以使光線經由該透鏡單元 u折射後，其於Y方向上之輕射範圍變大，亦即，該透於 單元11之凹面拓展了至少—led光源4!於丫方向上之^ 射範圍。 該透鏡單兀11上之凸面用於壓縮至少一 LED光源q 發出之光線沿X方向之輕射範圍。該凹面可使從其上出射 之光線於該X方向上由該凸面之兩端向其頂部產生會聚狀 偏轉，從而使光線經由該透鏡單A u.折射方向 上之輕射範圍變小’亦即’該凸面壓縮了至少-LED光源 41於X方向上之輻射範圍。 μ參閱圖11，其示出了至少一 LED光源41發出之光 線經由光| 1G透射後形成之光場。該光場大致呈一長條 狀，由該光場可看出，至少一 LED光源41於γ方向上^ 輻射範圍大在於X方向上之輻射範圍，且與圖2示出之近 似圓對％之光場相比，該光場之光強度更加均勻。故，該 光罩10可應用於光場於γ方向上之輻射範圍大在於x方 向上之輻射範圍之情形，從而提高至少一 led光源“之 光利用效率及光均勻度。 请參閱圖12，本發明第三實施例之光罩50，其與本發 1325480 •明第-實補之光罩1G錢相同，差別僅在於：該光罩 •之入光面510設置為平面，❿出光面512設置為凹面。 請-起參_ 13，可理解，當該光罩5()取代光罩 應用於本發明第二實施例之照明褒置4〇時，其同樣可拓 至y LED光源41於γ方向上之輻射範圍。 當然’當該光罩50之入光面51〇設置為凸面時，1亦 同樣可壓縮至少一 LED光源41於χ方向上之輻射範圍， 如圖14所不。 ,該㈣及該凸面除了可為第一、第二及第三實施例所 =之早-曲率半徑之柱狀凹面及柱狀凸面外，其亦可為 ，、有不同曲率半徑之凹面及凸面；另外，藉由變換至少一 透鏡單s u、51之數目及至少_透鏡單元u、5i中條狀 微結構111、511之數目等，可使至少- LED光源41產生 之光場具有不同之輻射範圍及光均勻度。 ^外’該X方向與該丫方向之間之預設夾角可為銳角 ^ 以調整至少- LED光源41發出之光線經由該光 :〇 50折射後於乂方向上與丫方向上之光場，從而更 加適應實際需要。 -奋^發月第、第二實施例所提供之光罩1G、50，及第 W所提供之照明震i 4〇，其藉由設置具有入光面 51〇與出光面112、512之透鏡單元η、51，以及將 1 =光面U0、510及該出光面112、512中至少一者設置 : 方向延伸之凹面，並進一步於該凹面配置至少一沿 向I伸之條狀微結構U1、5ιι，可使得至少一 [ED光 11 ^25480 .並使H、— °上之_射範圍大在於X方向上之輻射範圍， 而^ LED光源41產生之光場之光強度均勻化，從 而臭南至少- LED光源41之光利用效率及光均勾度。 ，本發明確已符合發明專利之要件，遂依法 專利申睛。惟，以上所述者僅為本發明之較佳實施方 ^自不月b以此限制本案之中請專利範圍。舉凡熟悉本案 之人士援依本發明之精神所作之等效修倚或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係先前之一種近似圓對稱光場之模擬圖。 圖2係本發明第一實施例光罩之結構示意圖。 圖3係圖2所示光罩中透鏡單元之結構示意圖。 圖4係圖2所示光罩之透鏡單元之剖面示意圖。 圖5-8係圖2所示光罩之透鏡單元經變更後之剖面示意 圖9係本發明第二實施例照明裝置之結構示意圖。 圖10係圖9所示照明裝置光罩之部分結構示意圖。 圖11係圖10所示照明裝置產生之光場之模擬圖。· 圖12係本發明第三實施例光罩之結構示意圖。 圖13係圖12所示光罩取代圖9所示光罩所形成之照 明裝置之結構示意圖。 … 圖14係圖12所示光罩經變更後取代圖9所示光罩所 形成之照明裝置之結構示意圖。 【主要元件符號說明】 12 1325480 光罩 10、50 -透鏡單元 11 入光面 110 、 510 條狀微結構 111 出光面 112 > 512 照明裝置 40 光源 41 反射板 42 電路板 410 梯形凹槽 420 侧壁 422Referring to FIG. 10, in this embodiment, each LED light source array is configured with seventeen LED light sources linearly distributed in the Y direction (only three representative ones are shown in FIG. 10), and the seventeen LED light sources are divided into It is a first LED light source group, a second LED light source group and a third LED light source group. The first LED light source group includes six LED light sources, and the lens unit 11 corresponding to the six LED light sources is not provided with the strip microstructures 111. The second LED light source group includes three LED light sources, and the lens unit 11 corresponding to the three LED light sources is provided with three strip-shaped microstructures 111. The third LED light source group includes eight LEDs 9^^5480 light sources' and the lens unit u corresponding to the H LED light sources is configured with five strip-shaped microstructures. x' The concave surface on the lens 7G 11 is used to extend at least the range of light emitted by the LEd source in the Y direction. Specifically, the concave surface can cause the light incident thereon to be radially deflected in the Y direction, that is, from the bottom of the concave surface to the higher end of the concave surface, so that the light is refracted through the lens unit u, The light-radiation range in the Y direction becomes larger, that is, the concave surface of the unit 11 expands at least the range of the LED light source 4 in the x-direction. The convex surface on the lens unit 11 is used to compress the light-emitting range of the light emitted by the at least one LED light source q in the X direction. The concave surface can cause the light emitted from the light to be deflected in a convergence direction from the two ends of the convex surface to the top thereof in the X direction, thereby making the light range of the light passing through the lens single Au. That is, the convex surface compresses at least the radiation range of the LED light source 41 in the X direction. Referring to Figure 11, there is shown a light field formed by the transmission of at least one of the LED light sources 41 through the light | 1G. The light field is substantially in the shape of a strip. As can be seen from the light field, at least one of the LED light sources 41 has a radiation range in the γ direction that is larger in the X direction, and is approximately circular to % as shown in FIG. The light intensity of the light field is more uniform than that of the light field. Therefore, the reticle 10 can be applied to the case where the radiation range of the light field in the γ direction is larger than the radiation range in the x direction, thereby improving the light utilization efficiency and the light uniformity of at least one LED light source. Referring to FIG. 12, The photomask 50 of the third embodiment of the present invention is the same as the photomask 1G of the present invention, and the difference is only that the light incident surface 510 of the photomask is disposed in a plane, and the light surface 512 is formed. It is set as a concave surface. Please understand that when the photomask 5 () is applied to the illumination device 4 of the second embodiment of the present invention instead of the photomask 5, it can also be extended to the y LED light source 41. Radiation range in the gamma direction. Of course, when the light incident surface 51 of the reticle 50 is set to be convex, 1 can also compress the radiation range of at least one LED light source 41 in the χ direction, as shown in FIG. The (4) and the convex surface may be concave and convex surfaces having different radii of curvature, in addition to the columnar concave surface and the columnar convex surface of the early-curvature radius of the first, second and third embodiments; In addition, by changing the number of at least one lens single su, 51 and at least _ lens unit u, 5i The number of the middle strip-shaped microstructures 111, 511, etc., can cause at least the light field generated by the LED light source 41 to have different radiation ranges and light uniformity. The external angle between the X direction and the meandering direction can be Sharp angle ^ to adjust at least - the light emitted by the LED light source 41 is refracted by the light: 〇50 and the light field in the 乂 direction and the 丫 direction, thereby more adapting to the actual needs. - Fen ^ 发 第, the second embodiment Provided by the reticle 1G, 50, and the illumination provided by the W, by providing the lens unit η, 51 having the light incident surface 51 〇 and the light exit surface 112, 512, and the 1 = smooth surface U0 And 510 and at least one of the light-emitting surfaces 112 and 512 are disposed: a concave surface extending in a direction, and further disposed on the concave surface with at least one strip-shaped microstructure U1 and 5 ι extending along the I, so that at least one [ED light 11 ^ 25480 And the range of the radiation on H, - ° is greater in the radiation range in the X direction, and the light intensity of the light field generated by the LED light source 41 is uniform, so that at least the light utilization efficiency and light of the LED light source 41 The hook is used. The invention has indeed met the requirements of the invention patent. However, the above is only the preferred embodiment of the present invention. This is to limit the scope of the patent in this case. Anyone who is familiar with the case will be equivalent to the spirit of the present invention. Or a change, it should be included in the following patent application. [Simplified illustration of the drawing] Fig. 1 is a simulation diagram of a previously approximate circularly symmetric light field. Fig. 2 is a schematic structural view of a photomask according to a first embodiment of the present invention. 3 is a schematic view showing the structure of the lens unit in the reticle shown in Fig. 2. Fig. 4 is a schematic cross-sectional view showing the lens unit of the reticle shown in Fig. 2. Fig. 5-8 is a modified sectional view of the lens unit of the reticle shown in Fig. 2. Figure 9 is a schematic view showing the structure of a lighting device of a second embodiment of the present invention. Figure 10 is a partial structural view of the illuminating device reticle of Figure 9. Figure 11 is a simulation diagram of the light field generated by the illumination device shown in Figure 10. Figure 12 is a schematic view showing the structure of a photomask according to a third embodiment of the present invention. Figure 13 is a block diagram showing the structure of the illumination device formed by the reticle of Figure 12 instead of the reticle of Figure 9. Fig. 14 is a schematic view showing the structure of the illuminating device formed by replacing the reticle shown in Fig. 9 with the reticle shown in Fig. 12. [Main component symbol description] 12 1325480 Photomask 10, 50 - Lens unit 11 Light-incident surface 110, 510 Strip-shaped microstructure 111 Light-emitting surface 112 > 512 Illumination device 40 Light source 41 Reflector 42 Circuit board 410 Trapezoidal groove 420 Side Wall 422
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