1308802 97-10-31 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種照明裝置（illuminating device), 且特別是有關於一種具有均勻混光效果的照明裝置及其混 光元件。 【先前技術】 由於發光二極體（Light Emitting Diode，LED)具有較 長的使用壽命以及較低的耗電特性，因此發光二極體的應 用正趨於普遍化，例如大型顯示的電子看板、紅綠燈及方 向燈等。目前的發光二極體產業正朝著高亮度、低光損的 目標邁進’以使發光二極體足以取代傳統的照明措施。此 外’未來發光二極體將逐漸應用於高亮度之發光二極體投 影光源，如可應用於數位影像投影裝置（Digital Ught Processing projector，DLP projector)、液晶投影裝置（u叫^ Crystal Display projector，LCD projector)與其他新型之彩 色高亮度光學投射裝置上。 "~ 第1圖繪示爲習知發光二極體照明裝置的配置示音 圖。請參照第1 習知之發光二極體照明裝置1〇〇主要 係由一紅光發光二極體晶片102、一綠光發光二極體晶片 104、一藍光發光二極晶片106、一電路板110、一基座12〇 以及一燈罩130所構成。其中’紅光發光二極體晶片1〇2、 綠光發光二極體晶片104以及藍光發光二極晶片ι〇6配置 於電路板110上，並與電路板110電性連接，且電路板11〇 配置於基座12〇上。燈罩130例如是一中空球體，係配置 1308802 97-10-31 於基座12〇上，並將電路板110罩附。此照明裝置100係 藉由紅光發光二極體晶片102、綠光發光二極體晶片1〇4 以及藍光發光二極晶片106所發出之紅光 '綠光及藍光相 互混合後，使得經由燈罩130出射之光線爲特定顏色光的 型態。 値得注意的是，上述所揭露之照明裝置僅以一燈罩將 紅光發光二極體晶片、綠光發光二極體晶片以及藍光發光 一極晶片罩附’會造成接近紅光發光二極體晶片處會呈現 紅光，接近綠光發光二極體晶片處會呈現綠光，而接近藍 光發光二極體晶片處則會呈現藍光，如此將造成照明裝置 產生混色不均勻的現象。此外，習知照明裝置產生之光線 在經由燈罩出射後隨即發散，造成光能量無法集中，亦無 法將光線匯集至單一方向，故不具投射的功能。 【發明內容】 因此，本發明的目的就是提供一種照明裝置，可達成 均勻混光的效果，並提高整體的光利用率，降低光能量的 損失。 本發明的再一目的是提供一種混光元件，可將光線均 勻混光，進而提高光能量的均勻度。 本發明提出一種照明裝置，包括發光元件以及混光元 件（light mixing-element)。其中，混光元件係由一中空管 狀體以及多個塊狀體所構成，且具有至少一光出射截面 (light emitting cross-section)，且混光元件內部具有至少 一粗化面。發光元件係配置在混光元件的一端，以使發光 1308802 97-10-31 元件所發出的光線可藉由混光元件內部的粗化面散射光 線，而達成均勻混光的效果。 依照本發明之實施例所述’發光元件包括一種或多數 種色光的發光元件。 依照本發明之實施例所述，混光元件係由一中空管狀 體以及多個塊狀體所構成，其中塊狀體係塡裝在中空管狀 體的內部，而此些塊狀體的材質可以相同也可以不同。 而且，在本發明之較佳實施例中，混光元件內部的粗 化面例如是位於此些塊狀體上。在此，粗化面可以是完全 粗化的表面或是部分粗化的表面。 此外，混光元件的形狀可以是圓柱體、圓錐體、曲面 柱體或是不規則面柱體。且混光元件之光出射截面以外的 區域上還可以配置有一反射膜。 另外，依照本發明之實施例所述，光出射截面之周圍 或前方及混光元件的周圍還可以配置有聚光元件，用以將 光自出射截面出射之光線集中朝一主要方向投射。而聚光 元件可以是由反射罩或聚光透鏡至少其中一種所構成。 本發明還提出一種照明裝置，包括發光元件以及混光 元件（light mixing-element)。其中’混光元件係由一中空 管狀體以及多個塊狀體所構成，且具有至少一光出射截面 (light emitting Cr〇SS-section)。而混光元件的內部則具有 至少一粗化面。 塊狀體係塡裝在中空管狀體的內部，且混光元件內部 的粗化面係位於此些塊狀體上。在此，粗化面可以是完全 1308802 97-10-31 粗化的表面或是部分粗化的表面。 發光元件係配置在此些塊狀體之間，以使發光元件所 發出的光線可藉由混光元件內部的粗化面散射光線，而達 成均勻混光的效果。 依照本發明之實施例所述，發光元件包括一種或多數 種色光的發光元件。而塊狀體的材質可以相同也可以不同。 此外，混光元件的形狀可以是圓柱體、圓錐體、曲面 柱體或是不規則面柱體。且混光元件之光出射截面以外的 區域上還可以配置有一反射膜。 另外，依照本發明之實施例所述，光出射截面之周圍 或前方及混光元件的周圍還可以配置有聚光元件，用以將 光自出射截面出射之光線集中朝一主要方向投射。而聚光 元件可以是由反射罩或聚光透鏡至少其中一種所構成。 本發明還提出一種混光元件，包括一中空管狀體以及 多個塊狀體’且具有至少一光出射截面（light emitting cross-section)。而混光元件的內部則具有至少一粗化面。 其中，塊狀體係塡裝在中空管狀體的內部。而且，混光元 件內部的粗化面係位於此些塊狀體上。在此，粗化面可以 是完全粗化的表面或是部分粗化的表面。 依照本發明之實施例所述，此些塊狀體的材質可以相 同也可以不同。 此外，依照本發明之實施例所述，混光元件的形狀可 以是圓柱體、圓錐體、曲面柱體或是不規則面柱體。且混 光元件之光出射截面以外的區域上還可以配置有一反射 1308802 97-10-31 膜。 本發明係利用混光元件內部的粗化面散射混光元件中 的光線，以將不同種之色光或單一色光均勻混光。而且， 本發明可將混光元件的光出射截面以外的區域皆設計爲反 射面，因此混光元件內的光線並不會由光出射截面以外的 區域出射。並且能藉由反射面所產生的反射效果，使光線 在混光元件中均勻混光。所以，本發明之混光元件不但可 以達成均勻混光的目的，更可以提高光的利用率，並降低 光能量的損失。 此外，由於本發明之照明裝置可於混光元件的光出射 截面的周圍或前方配置聚光元件，因此由光出射截面出射 的光線皆可藉此聚光元件而集中往同一方向出射。所以， 本發明之發光二極體照明裝置除了可提供一均勻混光的光 線外，更能夠提高整體照明裝置的輸出亮度。 爲讓本發明之上述和其他目的、特徵和優點能更明顯 易懂，下文特舉一較佳實施例，並配合所附圖式，作詳細 說明如下。 【實施方式】 第2圖繪示爲本發明一較佳實施例的一種發光二極體 照明裝置的配置示意圖。請參照第2圖，發光二極體照明 裝置包括發光元件202以及混光元件204。其中，發光元件 202例如是發光二極體晶片，且其例如是配置在電路板200 上，並與電路板200電性連接。而本實施例中的發光元件 2〇2例如是紅光發光二極體晶片2〇2a、藍光發光二極體晶 1308802 97-10-31 片2〇2b以及綠光發光二極體晶片2〇2c。當然，發光元件 202也可以是由具有相同色光的發光元件所構成。熟悉此項 技術之人士可因應其需求，針對發光元件202的色光作出 適當的選擇。 此外，在本實施例中更將聚光元件206配置於光出射 截面210之周邊上，使得經由光出射截面210出射的光線 可以聚集往同一方向發出，以提高此發光二極體照明裝置 的光利用率。而聚光兀件206例如是一反射罩(reflector)。 然而，本發明之聚光元件206的型式並非限定於本實 施例所述之反射罩’其還可以是一聚焦透鏡（未繪示）或 是其他等效之光學元件，以使光線由光出射截面210集中 出射。 本實施例中的混光元件204例如是由一虫_空管柱體 208以及多個塊狀體212所構成。其中，每一塊狀體212 的材質可以相同也可以不相同。而發光元件202例如是配 置於中空管柱體208之一端。且混光元件204內部至少具 有一粗化面，如第2圖中標示爲A之處。其他與標號A所 示之處相同者亦爲粗化面，爲了使圖示較爲簡潔以利於說 明，本處將不再逐一標示。 發光元件202所發出的光線可經由粗化面A將其散 射，使得混光元件204內的每一種色光能夠均勻混光而呈 現另一種不同於此些色光之顏色的光線。在本實施例中， 紅光發光二極體晶片202a、藍光發光二極體晶片202b以及 綠光發光二極體晶片所發出之光線經混光元件204均 1308802 97-10-31 勻混光後，將呈現一白光，並由光出射截面210出射。 本實施例中，混光元件204之光出射截面210以外的 其他表面例如是具有高反射之特性，此特性僅需藉由在此 些表面上鍍上或貼上高反射薄膜（未繪示）即可達成。如 此一來，進入混光元件204內的光線便可藉由上述具有高 反射特性之表面反射，以進一步提高光利用率以及混光效 果。 特別的是，本實施例之塊狀體212例如是具有經過粗 化處理的表面。發光元件202所發出的光線之行進的方向 會被此些粗化面改變，並以不同角度散射，故光線在經由 粗化面散射後將可達到均勻混光的效果。以下將以圖示對 此些粗化面作較詳細的說明。 第3A圖至第3C圖分別繪示爲本發明之較佳實施例 中，組成混光元件之塊狀體的剖面圖。請參照第3A圖，塊 狀體212可以是具有一平滑面以及一完全粗化面。另外， 如第3B圖所示，塊狀體212也可以是具有二完全粗化面。 其更可以如第3C圖所示，塊狀體212之二截面分別爲一完 全粗化的表面以及部份粗化的表面。當然，其他由上述之 型態變化組合而成的塊狀體，例如是具有一部份粗化的表 面以及一平坦表面的塊狀體等等，皆屬本發明之精神與範 圍內。 而形成粗化面的方法可以是直接對塊狀體212的接合 面作粗化處理，例如是以機械刀具或是一般的微影餽刻製 程在接合面上形成圖案(pattern)。此外，也可以在塊狀體 1308802 97-10-31 2U的截面上黏附多個透明小顆粒（未繪示），其同樣可粗 化塊狀體212的截面，以充分將光線散射。 値得注意的是，本發明之照明裝置中的發光元件還可 以配置於其他位置，以下將配合圖示對其加以說明。 第4圖與第5圖分別繪示爲本發明之另一較佳實施例 的照明裝置之配置示意圖。請參照第4圖，本發明之照明 裝置中，發光.元件2〇2例如是部分嵌進混光元件204內的。 而第4圖所繪示之照明裝置除了發光元件所配置的位置不 同於第2圖所繪示之配置位置外，其他元件之結構、形成 方法及其功能皆同於第2圖之說明，此處將不再贅述。 請參照第5圖，發光元件2〇2係配置在混光元件204 內部之塊狀體2U之間。此種配置方法可使混光元件204 的兩端皆爲光出射截面210,而混光元件204除了光出射截 面210外的表面上’例如是貼附有反射膜（未繪示），以 使此照明裝置往二方向出射光線。當然，本發明之混光元 件204上的之反射膜亦可以爲套件型態，套設於混光元件 2〇4之光出射截面210以外的表面上。 此外，本實施例還將二聚光元件206分別配置在二光 出射截面210的周邊上，用以集中出射的光線。 而每一塊狀體212皆具有粗化面，用以將發光元件202 所發出之光線在混光元件204中均勻混合。塊狀體212之 粗化面的型態及形成方法皆如第3A圖至第3C圖之說明， 此處將不再贅述。 另外’本發明之照明裝置的混光元件還可以是其他形 12 1308802 97-10-31 狀的混光元件。第6A圖至第6F圖繪示爲本發明之較佳實 施例的混光元件之立體圖。請同時參照第6A圖至第6F圖， 本發明之混光元件除了第2圖所繪示的圓柱體外，還可以 是第6A圖所繪示之三角柱體的混光元件504a、第6B圖所 繪示之長方體的混光元件504b、第6C圖所繪示之圓錐體 的混光元件504c或是第6D圖所繪示之曲線柱體的混光元 件5(Md。除此之外，混光元件甚至可以是第6E圖所繪示 之箭形體的混光元件504e或是第6F圖所繪示之不規則的 混光元件504f。 値得注意的是，第6A圖至第6F圖所繪示的混光元件 亦是由一中空管狀體508與多個具有粗化面之塊狀體212 所構成，此些塊狀體212即如第3A圖至第3C圖之說明， 此處將不再贅述。此外，還可在第6A圖至第6F圖所繪示 的混光元件之光出射截面510之外的表面上配置反射膜（未 繪示），以使光線可於混光元件中均勻混光，並避免光能 量的損失。 此外，値得注意的是，雖然第一實施例中之發光二極 體晶片以紅、綠、藍三原色爲例，熟悉該項技術者應可推 知’本發明並不限於以此三原色混合爲某特定色光，亦可 以兩種不同色彩以上之發光元件混合成任何特定的顏色， 或是將多顆同色發光元件之光混成強度集中的光。 綜上所述，本發明係利用混光元件內部的粗化面使入 射混光元件中的光線可任意散射，以將光線均勻混光。除 此之外’本發明更利用混光元件的反射面來提高混光均勻 1308802 97-10-31 度，並降低光能量的損失。而且，由於本發明之照明裝置 還可以於混光元件的光出射截面的周邊或前方配置一聚光 元件，因此由光出射截面出射的光線皆可藉此聚光元件而 集中往同一方向出射。所以，本發明之照明裝置除了可提 供一均勻混光後所呈現的特定色光外，更能夠提高整體照 明裝置的輸出亮度。 雖然本發明已以較佳實施例揭露如上，然其並非用以 限定本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍內，當可作些許之更動與潤飾，因此本發明之保護 範圍當視後附之申請專利範圍所界定者爲準。 【圖式簡單說明】 第1圖繪示爲習知照明裝置的配置示意圖。 第2圖繪示爲本發明一較佳實施例的一種照明裝置的 配置示意圖。 第3A圖至第3C圖分別繪示爲本發明之較佳實施例 中’混光元件內部之塊狀體的剖面圖。 第4圖繪示爲本發明之另—較佳實施例的照明裝置之 配置示意圖。 第5圖繪示爲本發明之又一較佳實施例的照明裝置之 配置示意圖。 第6A圖至第6F圖繪示爲本發明之較佳實施例的混光 元件之立體圖。 【圖式標示說明】 100 :照明裝置 1308802 97-10-31 102、202a :紅光發光二極體晶片 104、202c :綠光發光二極體晶片 106、202b :藍光發光二極體晶片 110、200 :電路板 120 :基座 130 :燈罩 202 :發光元件 208、508 :中空管狀體 210 :光出射截面 204、504a、504b、504c、504d、504e、504f :混光元 206 :聚光元件 212 :塊狀體 A :粗化面1308802 97-10-31 IX. Description of the Invention: [Technical Field] The present invention relates to an illuminating device, and more particularly to an illuminating device having a uniform light mixing effect and a light mixing device thereof . [Prior Art] Due to the long service life and low power consumption characteristics of the light emitting diode (LED), the application of the light emitting diode is becoming more and more popular, such as a large display electronic signboard, Traffic lights and direction lights. The current LED industry is moving towards a goal of high brightness and low light loss, so that the light-emitting diode is sufficient to replace traditional lighting measures. In addition, the future LEDs will be gradually applied to high-brightness LED projection sources, such as Digital Ught Processing Projectors (DLP projectors) and liquid crystal projectors (called Crystal Display projectors). LCD projector) and other new color high brightness optical projection devices. "~ Figure 1 shows the configuration of a conventional light-emitting diode lighting device. Referring to the first conventional light-emitting diode illumination device, a red light-emitting diode chip 102, a green light-emitting diode wafer 104, a blue light-emitting diode chip 106, and a circuit board 110 are mainly used. A base 12 〇 and a lamp cover 130 are formed. The red light emitting diode chip 1 〇 2, the green light emitting diode chip 104, and the blue light emitting diode chip 〇6 are disposed on the circuit board 110 and electrically connected to the circuit board 110, and the circuit board 11 The crucible is disposed on the base 12A. The lamp cover 130 is, for example, a hollow sphere, and is configured with 1308802 97-10-31 on the base 12A, and covers the circuit board 110. The illumination device 100 is mixed with the red light 'green light and blue light' emitted by the red light emitting diode chip 102, the green light emitting diode chip 1〇4, and the blue light emitting diode chip 106, so that the light is passed through the lampshade. The light emitted by 130 is the type of light of a particular color. It should be noted that the illumination device disclosed above only uses a lampshade to attach a red light emitting diode chip, a green light emitting diode chip, and a blue light emitting diode chip cover to cause a near red light emitting diode. Red light will appear at the wafer, green light will appear near the green light-emitting diode chip, and blue light will appear near the blue light-emitting diode chip, which will cause uneven color mixing of the illumination device. In addition, the light generated by the conventional illumination device is diverged immediately after exiting through the lamp cover, so that the light energy cannot be concentrated, and the light cannot be collected in a single direction, so that the projection function is not provided. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an illumination device that achieves the effect of uniform light mixing, improves overall light utilization, and reduces loss of optical energy. It is still another object of the present invention to provide a light mixing element which uniformly condenses light to improve the uniformity of light energy. The present invention provides an illumination device comprising a light-emitting element and a light mixing-element. Wherein, the light mixing element is composed of a hollow tubular body and a plurality of block bodies, and has at least one light emitting cross-section, and the light mixing element has at least one roughening surface inside. The light-emitting element is disposed at one end of the light-mixing element, so that the light emitted by the light-emitting component of the light-emitting device can be condensed by the roughened surface inside the light-mixing element to achieve uniform light mixing. The 'light-emitting element' includes one or a plurality of colored light-emitting elements in accordance with an embodiment of the present invention. According to an embodiment of the invention, the light mixing element is composed of a hollow tubular body and a plurality of block bodies, wherein the block system is mounted inside the hollow tubular body, and the materials of the block bodies can be the same It can also be different. Moreover, in a preferred embodiment of the invention, the roughened faces inside the light mixing elements are, for example, located on such blocks. Here, the roughened surface may be a completely roughened surface or a partially roughened surface. Further, the shape of the light mixing element may be a cylinder, a cone, a curved cylinder or an irregular surface cylinder. Further, a reflective film may be disposed on a region other than the light exiting section of the light mixing element. Further, in accordance with an embodiment of the present invention, a light collecting element may be disposed around or in front of the light exiting section and around the light mixing element for concentrating light emitted from the exit section toward a main direction. The concentrating element may be composed of at least one of a reflection cover or a condensing lens. The present invention also provides an illumination device comprising a light-emitting element and a light mixing-element. The 'light-mixing element' is composed of a hollow tubular body and a plurality of block-shaped bodies and has at least one light emitting Cr〇 SS-section. The interior of the light mixing element has at least one roughened surface. The block system is armored inside the hollow tubular body, and the roughened surface inside the light mixing element is located on the lump. Here, the roughened surface may be a completely 1308802 97-10-31 roughened surface or a partially roughened surface. The light-emitting element is disposed between the plurality of blocks so that the light emitted by the light-emitting element can scatter light by the roughened surface inside the light-mixing element to achieve uniform light mixing. According to an embodiment of the invention, the illuminating element comprises one or a plurality of luminescent elements. The material of the block may be the same or different. Further, the shape of the light mixing element may be a cylinder, a cone, a curved cylinder or an irregular surface cylinder. Further, a reflective film may be disposed on a region other than the light exiting section of the light mixing element. Further, in accordance with an embodiment of the present invention, a light collecting element may be disposed around or in front of the light exiting section and around the light mixing element for concentrating light emitted from the exit section toward a main direction. The concentrating element may be composed of at least one of a reflection cover or a condensing lens. The present invention also provides a light mixing element comprising a hollow tubular body and a plurality of massive bodies' and having at least one light emitting cross-section. The interior of the light mixing element has at least one roughened surface. Among them, the block system is armored inside the hollow tubular body. Moreover, the roughened surface inside the light mixing element is located on the blocks. Here, the roughened surface may be a completely roughened surface or a partially roughened surface. According to an embodiment of the invention, the materials of the blocks may be the same or different. Further, in accordance with an embodiment of the present invention, the shape of the light mixing element may be a cylinder, a cone, a curved cylinder or an irregular surface cylinder. Further, a reflective 1308802 97-10-31 film may be disposed on a region other than the light exiting section of the light mixing element. In the present invention, the light in the light mixing element is scattered by the roughened surface inside the light mixing element to uniformly mix different kinds of color light or single color light. Further, in the present invention, the regions other than the light exiting cross section of the light mixing element can be designed as the reflecting surface, and therefore the light in the light mixing element is not emitted from the region other than the light exiting cross section. Moreover, the light can be uniformly mixed in the light mixing element by the reflection effect generated by the reflecting surface. Therefore, the light-mixing element of the present invention can not only achieve the purpose of uniform light mixing, but also improve the utilization of light and reduce the loss of light energy. Further, since the illuminating device of the present invention can arrange the condensing elements around or in front of the light-emitting cross section of the light-mixing element, the light beams emitted from the light-emitting cross-section can be concentrated and emitted in the same direction by the condensing elements. Therefore, the LED lighting device of the present invention can improve the output brightness of the overall illumination device in addition to providing a uniform light mixing. The above and other objects, features, and advantages of the present invention will become more apparent from the understanding of the appended claims. Embodiment 2 FIG. 2 is a schematic view showing the configuration of a lighting diode lighting device according to a preferred embodiment of the present invention. Referring to Fig. 2, the light-emitting diode illumination device includes a light-emitting element 202 and a light-mixing element 204. The light-emitting element 202 is, for example, a light-emitting diode chip, and is disposed on the circuit board 200, for example, and electrically connected to the circuit board 200. The light-emitting element 2〇2 in this embodiment is, for example, a red light-emitting diode chip 2〇2a, a blue light-emitting diode crystal 1308802 97-10-31 piece 2〇2b, and a green light-emitting diode chip 2〇. 2c. Of course, the light-emitting element 202 may also be composed of light-emitting elements having the same color light. Those skilled in the art can make appropriate choices for the color of the light-emitting element 202 in response to their needs. In addition, in the embodiment, the concentrating elements 206 are disposed on the periphery of the light exiting section 210, so that the light emitted through the light exiting section 210 can be concentrated and emitted in the same direction to improve the light of the LED illuminating device. Utilization rate. The concentrating element 206 is, for example, a reflector. However, the type of the concentrating element 206 of the present invention is not limited to the reflector described in this embodiment. It may also be a focusing lens (not shown) or other equivalent optical component to allow light to be emitted by light. The section 210 is concentrated and emitted. The light mixing element 204 in this embodiment is composed of, for example, a worm-empty tube cylinder 208 and a plurality of block bodies 212. The material of each block 212 may be the same or different. The light-emitting element 202 is, for example, disposed at one end of the hollow tubular body 208. And the light mixing element 204 has at least one roughened surface inside, as indicated by A in Fig. 2. Others that are the same as those shown in Figure A are also roughened surfaces. In order to make the illustrations more concise for explanation, the Department will not mark them one by one. The light emitted by the light-emitting element 202 can be scattered through the roughened surface A, so that each color light in the light-mixing element 204 can be uniformly mixed to exhibit another light different from the color of the colored light. In this embodiment, the light emitted by the red light emitting diode chip 202a, the blue light emitting diode chip 202b, and the green light emitting diode chip is uniformly mixed by the light mixing element 204 after 1308802 97-10-31 It will present a white light and exit from the light exit section 210. In this embodiment, the surface other than the light exiting section 210 of the light mixing element 204 has a high reflection property, for example, by plating or pasting a highly reflective film (not shown) on the surfaces. It can be achieved. As a result, the light entering the light mixing element 204 can be reflected by the above-mentioned surface having high reflection characteristics to further improve the light utilization efficiency and the light mixing effect. In particular, the block 212 of the present embodiment has, for example, a roughened surface. The direction in which the light emitted by the light-emitting element 202 travels is changed by the roughened surfaces and scattered at different angles, so that the light can be uniformly mixed after being scattered through the roughened surface. These roughened surfaces will be described in more detail below with reference to the drawings. 3A to 3C are cross-sectional views respectively showing a block body constituting a light mixing element in a preferred embodiment of the present invention. Referring to Figure 3A, the block 212 can have a smooth surface and a fully roughened surface. Further, as shown in FIG. 3B, the block body 212 may have two completely roughened faces. Further, as shown in Fig. 3C, the two sections of the block 212 are respectively a completely roughened surface and a partially roughened surface. Of course, other blocks which are combined by the above-described changes in type, such as a block having a partially roughened surface and a flat surface, are within the spirit and scope of the present invention. The method of forming the roughened surface may be to directly roughen the joint surface of the block 212, for example, by forming a pattern on the joint surface by a mechanical cutter or a general lithography feed process. Further, a plurality of transparent small particles (not shown) may be adhered to the cross section of the block body 1308802 97-10-31 2U, which may also roughen the cross section of the block body 212 to sufficiently scatter light. It is to be noted that the light-emitting elements in the illumination device of the present invention can also be disposed at other locations, which will be described below in conjunction with the drawings. 4 and 5 are respectively schematic views showing the arrangement of a lighting device according to another preferred embodiment of the present invention. Referring to Fig. 4, in the illumination device of the present invention, the light-emitting element 2 is, for example, partially embedded in the light-mixing element 204. The illuminating device shown in FIG. 4 has the same configuration as that of the second embodiment except that the position of the illuminating element is different from the position shown in FIG. 2, and the function of the other components is the same as that of FIG. 2, It will not be repeated here. Referring to Fig. 5, the light-emitting elements 2〇2 are disposed between the bulk bodies 2U inside the light-mixing elements 204. The arrangement method can make both ends of the light mixing element 204 be the light exiting section 210, and the surface of the light mixing element 204 except the light exiting section 210 is attached with a reflective film (not shown), for example. The illuminating device emits light in two directions. Of course, the reflective film on the light-mixing element 204 of the present invention may also be in the form of a kit, and is disposed on a surface other than the light exiting section 210 of the light-mixing element 2〇4. In addition, in this embodiment, the dichroic elements 206 are respectively disposed on the periphery of the two-light exiting section 210 for concentrating the emitted light. Each of the blocks 212 has a roughened surface for uniformly mixing the light emitted by the light-emitting element 202 in the light-mixing element 204. The type and formation method of the roughened surface of the block 212 are as described in Figs. 3A to 3C, and will not be described again. Further, the light mixing element of the illumination device of the present invention may be a light-mixing element of another shape 12 1308802 97-10-31. 6A to 6F are perspective views of a light mixing element according to a preferred embodiment of the present invention. Referring to FIG. 6A to FIG. 6F at the same time, the light mixing element of the present invention may be a light mixing element 504a and a sixth drawing of the triangular cylinder shown in FIG. 6A in addition to the outer cylinder of FIG. The light-blending element 504b of the rectangular parallelepiped, the light-mixing element 504c of the cone shown in FIG. 6C or the light-mixing element 5 of the curved cylinder shown in FIG. 6D (Md. The light element may even be the light-mixing element 504e of the arrow-shaped body shown in FIG. 6E or the irregular light-mixing element 504f shown in FIG. 6F. It is noted that the 6A to 6F drawings The light-mixing element is also composed of a hollow tubular body 508 and a plurality of blocks 212 having roughened surfaces, such as the description of Figures 3A to 3C, Further, a reflective film (not shown) may be disposed on a surface other than the light exiting section 510 of the light mixing element illustrated in FIGS. 6A to 6F so that the light can be applied to the light mixing element. Uniformly mixes light and avoids loss of light energy. In addition, it is noted that although the light-emitting diode crystal in the first embodiment Taking the three primary colors of red, green and blue as an example, those skilled in the art should be able to infer that the present invention is not limited to mixing a plurality of primary colors into a specific color light, or that two or more different color elements can be mixed into any particular color. Or the light of a plurality of light-emitting elements of the same color is mixed into light of concentrated intensity. In summary, the present invention utilizes the roughened surface inside the light-mixing element to arbitrarily scatter light in the incident light-mixing element to uniformly mix the light. In addition, the present invention further utilizes the reflecting surface of the light mixing element to increase the uniform light mixing of 1308802 97-10-31 degrees and reduce the loss of light energy. Moreover, since the lighting device of the present invention can also be used for light mixing A concentrating element is disposed around or in front of the light exiting section of the element, so that the light emitted from the light exiting section can be concentrated by the concentrating element and emitted in the same direction. Therefore, the illuminating device of the present invention can provide a uniform mixing. In addition to the specific color light presented after the light, the output brightness of the overall illumination device can be increased. Although the invention has been disclosed above in the preferred embodiment, it is not In order to limit the scope of the present invention, the scope of the present invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the configuration of a conventional lighting device. Fig. 2 is a schematic view showing the configuration of a lighting device according to a preferred embodiment of the present invention. Figs. 3A to 3C are respectively BRIEF DESCRIPTION OF THE DRAWINGS FIG. 4 is a cross-sectional view showing a block body inside a light mixing element in a preferred embodiment of the present invention. FIG. 4 is a schematic view showing the arrangement of a lighting device according to another preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 6A to FIG. 6F are perspective views of a light mixing device according to a preferred embodiment of the present invention. [Description of Patterns] 100: illumination device 1308802 97-10-31 102, 202a: red light emitting diode wafers 104, 202c: green light emitting diode chips 106, 202b: blue light emitting diode wafer 110, 200: circuit board 120: pedestal 130: lamp cover 202: light-emitting elements 208, 508: hollow tubular body 210: light exiting sections 204, 504a, 504b, 504c, 504d, 504e, 504f: light mixing element 206: concentrating element 212 : Block A: roughened surface
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