200914766 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種照明裝置，特別關於一種具有菲涅 爾紋路的照明裝置。 【先前技術】 隨著科技之進步，照明裝置實為現今曰常生活中不可 或缺之必需用品。不論是日常的室内照明燈具，或桌燈、 手電筒、廣告燈、車燈、路燈及交通號諸燈等都是常見的 照明裝置的態樣，以下照明裝置係以一檯燈為例說明。 請參照圖1所示，一種習知照明裝置10包含一燈罩 11以及一發光元件12。發光元件12係設置於燈罩11中， 且發光元件12係為一燈泡。於此，發光元件12所發出之 光線可直接地由發光元件12射出，或經由燈罩11反射而 間接地射出。然而，光線直接由燈泡射出或經由燈罩11 間接反射提供有效的照射面積有限，如此無法供應充足的 出光亮度。且使用者於利用照明裝置10進行閱讀時，照 明裝置10可能在大視角的地方產生眩光，散射光線可能 會射入使用者的眼睛，而導致使用者眼睛疲勞不適。 習知提高照明亮度的方法，可為選用亮度較高之發光 元件12，或是增加發光元件12的數量來擴大照射面積， 但是如此會增加照明裝置的成本。照明裝置除了必須具備 足夠亮度與照射面積之外，也必須顧及使用者利用照明裝 置閱讀時具舒適視覺感受以提升照明裝置的品質，故照明 5 200914766 裝置仍有改善的空間。 因此，如何提供一種照明裝置以提升照明亮度、擴大 照射面積且能均勻光線，已成為重要課題之一。 【發明内容】 ' 有鑑於上述課題，本發明之目的為提供一種照明裝 ' 置，具有高亮度、高均勻性、廣照射面積及舒適視覺感受 之優點。 緣是，為達上述目的，依本發明之一種照明裝置包含 一導光板、一光源模組以及一透鏡。導光板具有一入光侧 及一出光側。光源模組鄰設於入光側，光源模組具有至少 一發光元件；透鏡設置於導光板與發光元件之間。 為達上述目的，依據本發明之另一種照明裝置包含一 導光板、一光源模組以及一菲淫爾板。導光板具有一入光 側及一出光側。光源模組鄰設於入光側，光源模組具有至 少一發光元件。菲涅爾板鄰設於出光側，菲涅爾板的一侧 具有一菲涅爾紋路。 承上所述，依本發明之一種照明裝置藉由導光板匯整 發光元件所發出之光線，提高發光面積而提供面光源；並 藉由透鏡匯集光線以提高發光元件的出光效率，使照明裝 * 置的亮度提升。此外，照明裝置更可具有擴散板以柔和光 線或菲涅爾板以均勻光線亮度，避免眩光現象發生造成使 用者的不適。與習知技術相較，本發明能夠達到高亮度、 高均勻性、廣照射面積及舒適視覺感受的功效，確實符合 6 200914766 實際所需。 【實施方式】 以下將參照相關圖式’說明依據本發明輕 -種照明裝置，其中相同的元件將以相二施例之 明。 』日7付唬加以說 篇一實 請參照圖2所示，本發明第一實施例之一種照明裝置 2〇包含-導光板2卜-光源模組2 2以及—菲^板^ 導光板具有一入光側211及一出光側212。菲〉、曰m α ^ ，土爾板23鄰 5又於出光側212 ’菲淫爾板23的一側具有一菲、、日m 开/土 _紋路F。 光源模組22鄰設於入光側211，光源模組22具有至 少一發光元件221。發光元件221可選自冷陰極鸯^燈管 (Cold Cathode Fluorescent Lamp, CCFL) ' …、1¾極螢光燈 管（Hot Cathode Fluorescent Lamp, HCFL ")、欢 * "二極體 (Light Emitting Diode，LED )、電致發光哭件 (Electroluminescent Device, ELD )、鶴絲燈、水哿严甴 素燈、金屬齒化物燈及其組合所構成的群組。 於本實施例中，光源模組22具有至少—發光元件 在此係以發光二極體為例。當然，發光元件221之數量係 可依據實際需要而改變，而發光元件221之排列方式，則 係大致上相互對稱即可。發光元件221設置於—電路基板 222上，而電路基板222則設置於一散熱元件223上。务 —外接電源（圖未顯示）與電路基板222電性連接時，發 200914766 光元件221即可發出光線。當照明裝置20啟用時，散熱 元件223協助發光二極體散熱，確保光源模組22之使用 壽命及可靠度。 光源模組22鄰設於導光板21，光線L通過入光侧211 後會經由導光板21的反射側213反射，反射側213具有 複數網點結構2131，其可破壞光線之全反射進而通過出光 側212。出光側212之大小及形狀則可配合實際需求而改 變。 菲涅爾紋路F將導光板21射出的光線準直射出而成 為平行光線並均勻光線亮度，避免眩光現象之發生，使得 使用者之視覺感受較為舒適，確實符合實際使用上之需 求。 第二實施例 請參照圖3所示，本發明第二實施例之另一種照明裝 置20a包含一導光板21、一光源模組22以及一透鏡24a。 透鏡24a設置於導光板21與發光元件221之間。由於導光 板21及光源模組22已於第一實施例詳述，於此不再贅述。 於本實施例中，透鏡24a可具有一菲涅爾紋路F，菲 涅爾紋路F具有準直光線效用。由於光線受到準直故可縮 減導光板21的入光側211所需範圍，而降低導光板21的 厚度及原料成本。當然，入光侧211之大小可配合實際需 求而改變，以可接收經透鏡24a聚集後之光線範圍為主。 請參照圖4所示，透鏡24a可具有一凹部241及一出 光側242。凹部241係由一底面2411及一壁面2412所形 200914766 成。出光侧242係相對凹部241之底面2411設置’且壁 面2412的外緣可具有一反射層2413。透鏡24a之底面2411 及/或出光侧242可具有菲涅爾紋路F，在此以同心圓菲〉圼 爾紋路F為例說明，然非用以限制本發明’菲涅爾紋路亦 可為直線形。 請參照圖5所示，當透鏡24a的凹部241套設於發光 元件221時。發光元件221所發出之正向光線L1自凹部 241進入底面2411後再通過出光侧242。而發光元件221 所發出的側向光線L2由壁面2412外緣之反射層2413射 入出光侧242。 第二實施例 請參照圖6所示，本發明第三實施例之又一種照明裝 置20b包含一導光板21、一光源模組22、一透鏡24b以 及一擴散板25。由於導光板21及光源模組22已於第一實 施例詳述，於此不再贅述。 透鏡24b在凹部241之底面2411係為一凸起結構， 聚集發光元件221所發出之光線，而可提高發光元件221 之光線亮度。由於光線受到聚集的效果，故光線進入導光 板21的入光側211範圍亦可縮減，進而降低導光板21的 厚度及原料成本。而菲涅爾紋路F則設置於透鏡24b的出 光側242，而受凸起結構所聚集的光線經過出光側242的 菲涅爾紋路F變成改變路徑的平行光線射進入光側211範 圍可更縮減。當然，入光側211之大小可配合實際需求而 改變，以可接收經透鏡24b聚集後之光線範圍為主。 200914766 擴散板25鄰設於出光面212。擴散板25可具有複數 擴散粒子、增白劑、複數螢光粉或一微结構，而擴散粒子、 增白劑、螢光粉或微結構係具有擴散光線之作用。如此， 擴散板25係可柔化由導光板21之出光側212射出之光 線，使得使用者之視覺感受較為舒適，確實符合實際使用 上之需求。 照明装置20b可包含一散熱風扇（圖未顯示）。當昭 明裝置20b啟用時’散熱風扇可促使周圍空氣流動，以協 助照明裝置2〇b散熱’進而確保照明裝置20b之使用壽命 及可靠度。 請參照圖7所示，透鏡24b與上述透鏡24a不同之處 在於凹部241之底面2411係為一凸起結構，且菲涅爾紋 路F則設ί於透鏡24b的出光側242，在此以直線形菲涅 爾紋路F為例說明’然非用以限制本發明。 綜上所述，依本發明之一種照明裝置藉由導光板匯整 發光元件所發出之光線，提尚發光面積而提供面光源；並 藉由透鏡匯集光線以提高發光元件的出光效率，使照明裝 置的，度提升。此外’照明裝置更可具有擴散板以柔和^ 線或菲涅爾板以均勻光線亮度，避免眩光現象發生造成使 f者的不適。與習知技術相較，本發明能夠達到高亮度、 局均勻性、廣照射面積及舒適視覺感受的功 實際所ir。 人確貝付口 上所述僅為舉例性，而非為限制性者 以 本發明之精神與範脅’而對其進行之等效修改=脫: 200914766 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1係為一種習知照明裝置的示意圖； 圖2係為本發明第一實施例之一種照明裝置的示意 圖； ' 圖3係為本發明第二實施例之另一種照明裝置的示意 圖； 圖4係為本發明照明裝置之透鏡結構的示意圖； 圖5係為本發明照明裝置之透鏡結構套設於發光元件 的不' 意圖， 圖6係為本發明第三實施例之又一種照明裝置的示意 圖；以及 圖7係為本發明照明裝置之另一透鏡結構的示意圖。 【主要元件符號說明】 10 ' 20、20a、20b :照明裝置 11 :燈罩 12、221 :發光元件 21 :導光板 ' 211 :入光側 - 212、242 :出光側 213 :反射侧 2131 :網點結構 22 :光源模組 11 200914766 222 :電路基板 223 :散熱元件 23 :菲涅爾板 24a、24b ··透鏡 241 :凹部 2411 :底面 2412 :壁面 2413 :反射層 25 :擴散板 F :菲淫爾紋路 L :光線 L1 :正向光線 L2 :側向光線200914766 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a lighting device, and more particularly to a lighting device having a Fresnel pattern. [Prior Art] With the advancement of technology, lighting devices are an indispensable necessity in today's everyday life. Whether it is daily indoor lighting, table lamps, flashlights, advertising lights, lights, street lights and traffic lights, etc. are the common lighting devices. The following lighting devices are illustrated by a lamp. Referring to FIG. 1, a conventional illumination device 10 includes a lamp cover 11 and a light-emitting element 12. The light-emitting element 12 is disposed in the globe 11, and the light-emitting element 12 is a light bulb. Here, the light emitted from the light-emitting element 12 can be directly emitted from the light-emitting element 12 or reflected by the globe 11 and emitted indirectly. However, the light is directly emitted by the bulb or indirectly reflected by the lampshade 11 to provide a limited effective illumination area, so that sufficient light output brightness cannot be supplied. When the user uses the illumination device 10 for reading, the illumination device 10 may generate glare at a large viewing angle, and the scattered light may be incident on the user's eyes, causing the user's eyes to be uncomfortable. Conventionally, the method of increasing the brightness of the illumination may be to increase the illumination area by using the light-emitting element 12 having a higher brightness or by increasing the number of the light-emitting elements 12, but this increases the cost of the illumination device. In addition to having sufficient brightness and illumination area, the lighting device must also take into account the user's comfortable visual experience when reading with the lighting device to improve the quality of the lighting device. Therefore, there is still room for improvement in the lighting 5 200914766 device. Therefore, how to provide an illumination device to enhance illumination brightness, enlarge the illumination area, and evenly illuminate light has become one of the important topics. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an illumination device having advantages of high brightness, high uniformity, wide illumination area, and comfortable visual perception. In order to achieve the above object, an illumination device according to the present invention comprises a light guide plate, a light source module and a lens. The light guide plate has a light entrance side and a light exit side. The light source module is disposed adjacent to the light incident side, and the light source module has at least one light emitting element; the lens is disposed between the light guide plate and the light emitting element. In order to achieve the above object, another illumination device according to the present invention comprises a light guide plate, a light source module and a phobia plate. The light guide plate has a light entrance side and a light exit side. The light source module is adjacent to the light incident side, and the light source module has at least one light emitting component. The Fresnel plate is adjacent to the light exiting side, and one side of the Fresnel plate has a Fresnel pattern. According to the invention, an illumination device according to the present invention provides a surface light source by illuminating the light emitted by the light-emitting element by the light guide plate, and increases the light-emitting area; and collecting light by the lens to improve the light-emitting efficiency of the light-emitting element, so that the illumination device is installed. * The brightness of the setting is increased. In addition, the illuminating device may further have a diffusing plate to soften the light or the Fresnel plate to evenly illuminate the light to prevent the glare from causing discomfort to the user. Compared with the prior art, the invention can achieve high brightness, high uniformity, wide illumination area and comfortable visual experience, and indeed meets the actual requirements of 6 200914766. [Embodiment] Hereinafter, a light-type illumination device according to the present invention will be described with reference to the related drawings, wherein the same elements will be described in the second embodiment. Referring to FIG. 2, a lighting device 2 of the first embodiment of the present invention includes a light guide plate 2 - a light source module 2 2 and a Philippine plate 2. The light guide plate has A light incident side 211 and a light exit side 212. Philippine 曰, 曰m α ^ , the Turk plate 23 adjacent 5 and on the light-emitting side 212 ‘the Philippine slab 23 has a phenanthrene, day m open/earth _ grain F. The light source module 22 is adjacent to the light incident side 211, and the light source module 22 has at least one light emitting element 221. The light-emitting element 221 can be selected from the group consisting of a Cold Cathode Fluorescent Lamp (CCFL) ', a Cat Cathode Fluorescent Lamp (HCFL "), and a Light Emitting Diode, LED), electroluminescent device (ELD), crane lamp, sputum lamp, metal toothed lamp and combinations thereof. In this embodiment, the light source module 22 has at least a light-emitting element. Here, a light-emitting diode is taken as an example. Of course, the number of the light-emitting elements 221 can be changed according to actual needs, and the arrangement of the light-emitting elements 221 can be substantially symmetrical with each other. The light emitting element 221 is disposed on the circuit substrate 222, and the circuit substrate 222 is disposed on a heat dissipating component 223. When the external power supply (not shown) is electrically connected to the circuit board 222, the light element 221 can emit light. When the illuminating device 20 is activated, the heat dissipating component 223 assists in dissipating heat from the illuminating diode to ensure the service life and reliability of the light source module 22. The light source module 22 is disposed adjacent to the light guide plate 21, and the light beam L passes through the light incident side 211 and is reflected by the reflective side 213 of the light guide plate 21. The reflective side 213 has a plurality of dot structures 2131, which can destroy the total reflection of the light and pass through the light exiting side. 212. The size and shape of the light exiting side 212 can be changed to meet actual needs. The Fresnel pattern F collimates the light emitted from the light guide plate 21 into a parallel light and uniformly illuminates the light to avoid the occurrence of glare, so that the user's visual experience is more comfortable and indeed meets the practical needs. Second Embodiment Referring to Figure 3, another illumination device 20a according to a second embodiment of the present invention includes a light guide plate 21, a light source module 22, and a lens 24a. The lens 24a is disposed between the light guide plate 21 and the light emitting element 221. Since the light guide plate 21 and the light source module 22 have been described in detail in the first embodiment, details are not described herein again. In the present embodiment, the lens 24a may have a Fresnel pattern F, and the Fresnel pattern F has a collimated light effect. Since the light is collimated, the required range of the light incident side 211 of the light guide plate 21 can be reduced, and the thickness of the light guide plate 21 and the material cost can be reduced. Of course, the size of the light incident side 211 can be changed according to actual needs, so as to receive the light range after the lens 24a is concentrated. Referring to FIG. 4, the lens 24a may have a recess 241 and a light exiting side 242. The recess 241 is formed by a bottom surface 2411 and a wall surface 2412. The light exiting side 242 is disposed opposite the bottom surface 2411 of the recess 241 and the outer edge of the wall surface 2412 can have a reflective layer 2413. The bottom surface 2411 and/or the light exiting side 242 of the lens 24a may have a Fresnel pattern F. Here, the concentric circle 圼 圼 纹 纹 F F 为 为 为 为 , , , ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' shape. Referring to Fig. 5, when the concave portion 241 of the lens 24a is sleeved on the light-emitting element 221. The forward light L1 emitted from the light-emitting element 221 enters the bottom surface 2411 from the concave portion 241 and passes through the light-emitting side 242. The lateral light L2 emitted by the light-emitting element 221 is incident on the light-emitting side 242 by the reflective layer 2413 on the outer edge of the wall surface 2412. The second embodiment of the present invention further includes a light guide plate 21, a light source module 22, a lens 24b, and a diffuser plate 25. Since the light guide plate 21 and the light source module 22 have been described in detail in the first embodiment, they will not be described again. The lens 24b has a convex structure on the bottom surface 2411 of the concave portion 241, and collects light emitted from the light-emitting element 221, thereby improving the light intensity of the light-emitting element 221. Since the light is concentrated, the light entering the light incident side 211 of the light guide plate 21 can also be reduced, thereby reducing the thickness of the light guide plate 21 and the material cost. The Fresnel pattern F is disposed on the light exiting side 242 of the lens 24b, and the light collected by the convex structure passes through the Fresnel pattern F of the light exiting side 242, and the parallel light of the changing path is incident on the light side 211. . Of course, the size of the light incident side 211 can be changed according to actual needs, so as to receive the light range after the lens 24b is concentrated. 200914766 The diffuser plate 25 is adjacent to the light exit surface 212. The diffuser plate 25 may have a plurality of diffusing particles, a whitening agent, a plurality of phosphors or a microstructure, and the diffusing particles, brighteners, phosphors or microstructures have the function of diffusing light. In this way, the diffuser 25 softens the light emitted from the light exiting side 212 of the light guide plate 21, so that the user's visual experience is more comfortable, which is indeed in line with the actual use requirements. The lighting device 20b can include a cooling fan (not shown). When the illumination device 20b is activated, the "cooling fan can cause ambient air to flow to assist in illuminating the illumination device 2" to ensure the lifetime and reliability of the illumination device 20b. Referring to FIG. 7, the lens 24b is different from the lens 24a in that the bottom surface 2411 of the concave portion 241 is a convex structure, and the Fresnel pattern F is disposed on the light exiting side 242 of the lens 24b. The Fresnel pattern F is taken as an example to illustrate 'there is no limitation to the invention. In summary, an illumination device according to the present invention provides a surface light source by collecting the light emitted by the light-emitting element by the light guide plate, and providing a surface light source by illuminating the light-emitting area; and collecting light by the lens to improve the light-emitting efficiency of the light-emitting element, thereby making the illumination The degree of the device is increased. In addition, the illuminating device can further have a diffusing plate to soften the wire or the Fresnel plate to evenly illuminate the light, thereby preventing the glare from occurring and causing discomfort. Compared with the prior art, the present invention can achieve high brightness, local uniformity, wide illumination area and comfortable visual experience. The above description is only for the purpose of illustration and not limitation, and the equivalent modifications of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional lighting device; FIG. 2 is a schematic view of a lighting device according to a first embodiment of the present invention; FIG. 3 is another illumination of a second embodiment of the present invention. Figure 4 is a schematic view showing the lens structure of the illumination device of the present invention; Figure 5 is a schematic view of the lens structure of the illumination device of the present invention, which is disposed on the light-emitting device, and Figure 6 is a third embodiment of the present invention. Yet another schematic diagram of a lighting device; and Figure 7 is a schematic illustration of another lens configuration of the lighting device of the present invention. [Description of main component symbols] 10 '20, 20a, 20b: Illumination device 11: Lampshade 12, 221: Light-emitting element 21: Light guide plate '211: Light-in side - 212, 242: Light-emitting side 213: Reflection side 2131: Dot structure 22: light source module 11 200914766 222 : circuit board 223 : heat dissipating element 23 : Fresnel board 24a, 24b · · lens 241 : recess 2411 : bottom surface 2412 : wall surface 2413 : reflective layer 25 : diffusing plate F : Philippine texture L : light L1 : forward light L2 : lateral light