201104337 六 、發明說明： 【發明所屬之技術領域】 種適合應用於 本發明係關於一種照明系統，特別是關於_ 小型化投影裝置的照明系統。 【先前技術】 Φ 傳統的投影機所使用之光源乃是以高麼放電的原理製 作，其不但耗電，體積大，同時因其工作時所產生的高熱等問 題’一直成為投影機設計上的瓶頸。近來因發光二極體（led， Light-Emitting Diode)之發光功率已被大幅提高，例如 UJXE0N，CREE等鱗之LED，即以大功率的產品為主某 些產品甚至可達200流明以上。是故，開始有人嘗試以咖 作為投影機之光源。而隨著可攜式個人電子產品的風潮若投 • 職亦可縮小體積而方便攜帶，勢必為投影機及個人電子產品 的應用及市場帶來一波革命性的改變。 ·'、、:而纟於現有的led產品之設計仍以_般照明為主要 目標’其光線照射的分佈面積過大，造成料投影顯示元件卜 般為液晶面板)的光線強度不夠。舉例來說，若一 led晶片之 發光面積為1平方毫米（咖2)，而發光範圍為120。’則在距 晶片10毫米（_)的地方，發光範圍將暴增至_倍而晶片 與投影顯示元件的距離—般是遠遠超過1〇麵的，故光線漏失 201104337 的情況將頗為嚴重。為解決光線強度不夠的問題，#有業者使 用多個LED重疊照射顯示元件的同—區域，然而如此的作法 將增加光學路徑的長度，不利於投影機的小型化。 此外，由於投影顯示元件需要被均勻的光源照射，否則可201104337 VI. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to an illumination system, and more particularly to an illumination system for a miniaturized projection device. [Prior Art] Φ The light source used in the traditional projector is made by the principle of high discharge. It not only consumes electricity, but also has a large volume. At the same time, it has become a problem in projector design because of the high heat generated during its operation. bottleneck. Recently, the luminous power of LEDs (Light-Emitting Diodes) has been greatly improved. For example, UJXE0N, CREE and other scale LEDs, that is, high-power products, some products can even reach more than 200 lumens. Therefore, some people tried to use the coffee as the light source of the projector. With the trend of portable personal electronic products, it can also be reduced in size and convenient to carry, which will inevitably bring about a revolutionary change in the application and market of projectors and personal electronic products. · ',,: The design of the existing LED products is still based on _-like illumination. The light distribution area is too large, resulting in insufficient light intensity of the projection display component. For example, if a led chip has a light-emitting area of 1 square millimeter (coffee 2) and a light-emitting range of 120. 'At a distance of 10 mm (_) from the wafer, the range of illumination will increase to _ times and the distance between the wafer and the projection display element will be much more than 1 ,, so the loss of light will be quite serious. . In order to solve the problem of insufficient light intensity, a manufacturer uses a plurality of LEDs to overlap the same area of the display element. However, such an approach increases the length of the optical path, which is disadvantageous for miniaturization of the projector. In addition, since the projection display element needs to be illuminated by a uniform light source,
能在畫面的邊緣或中心造成光度或色彩不均的現象，此亦為製 造投影光源亟待解決之課題Q 再者’若投影設備可縮小至個人可攜式設備的尺寸，勢必 # 錢用電池等可攜式電源，因而如何更有效的節能，在小型化 投影設備的設計中亦應列入考量。 【發明内容】 本發明提供了-種使用於包含用以形成—影像畫面之顯 示元件（面板）之小型化投影裝置。該照明系統具有多個發光單 元’任一發光單元可發出一光|，照射於該顯示元件；其中， ’“束於該顯示元件上形成一光照範圍，且各光照範圍彼此間 實質上不互相重疊。 顯示元件可為一液晶面板。而前述多個發光單元可以排列 成一二維陣列。 在一實施例中，每一個發光單元可以包括：至少一個發光 二極體晶片；-封裝結構底座；以及形成於該封裝結構底座上 之一杯形反射結構，其中該至少-發光二極體晶片安裝於該杯 形反射結構内，且該聚光結構將該至少一個發光二極體晶片所 201104337 I出之光集聚成該光束。 在一實施態樣中，每一發光單元更可以包括_偏極片，以 讓該光束中之p極光穿透，並反射該光束之s極光。配合一極 _化疋件’可將反射自該偏極片之s極光部分轉化為p極 先。極性轉化^件可為—極性轉化薄膜，亦可為-極性轉化介 質’注入於該杯形反射結構中’以利用該杯形反射結構，將自It can cause luminosity or uneven color at the edge or center of the screen, which is also a problem to be solved in the manufacture of projection light source. Q. If the projection device can be reduced to the size of a personal portable device, it is bound to become a battery for money. Portable power supplies, so how to save energy more effectively, should also be considered in the design of small-scale projection equipment. SUMMARY OF THE INVENTION The present invention provides a miniaturized projection apparatus for use in a display element (panel) for forming an image. The illumination system has a plurality of illumination units 'any of the illumination units can emit a light|irradiation to the display element; wherein, 'the bundle forms a range of illumination on the display element, and each illumination range does not substantially mutually The display element can be a liquid crystal panel, and the plurality of light emitting units can be arranged in a two-dimensional array. In an embodiment, each of the light emitting units can include: at least one light emitting diode chip; And a cup-shaped reflective structure formed on the base of the package structure, wherein the at least-light-emitting diode chip is mounted in the cup-shaped reflective structure, and the light-concentrating structure outputs the at least one light-emitting diode wafer 201104337 I The light is concentrated into the light beam. In an embodiment, each of the light emitting units may further include a _polar plate for penetrating the p apolar light in the light beam and reflecting the s illuminance of the light beam. The element ' can convert the s aurora portion reflected from the polarizer into a p-pole. The polarity conversion can be a polarity conversion film or a -polar conversion medium. The cup-shaped reflective structure is used to utilize the cup-shaped reflective structure
該偏極片反射之s極光，經該極性轉化介質部分轉化為p極 光後，再度反射回該偏極片。 每一發光單元更可以包括一透鏡，其與該封裝結構底座組 合成一封裝結構。 為了將該光束收斂至該光照範圍，每一發光單元更可包括 有一反射光管，安裝於該封裝結構之前。 反射光管可以具有一第—開口及一第二開口其中該第一 開口上接至前述發料元，且該第二開σ接至—收束透鏡。 戎反射光管前可設-偏極片，容許該光束之卩極光穿透， 並將該光束之S極光反射回該反射光f，且該照明系統更包括 一可將該胁光所反射的s極光轉料？極光之—極性轉化 元件’使自該偏極肢射之s極光卿化為p極光，並由該反 射光管再度反射回該偏極片。極性轉化元件可為—極性轉化薄 膜’安褒於該反射光管與該顯示元件之間；亦可為_極性轉 化介質，注入於該反射光管之中。 在一實施例中，該反射光管具一内壁，而該内壁靠近該第 201104337 一開口之部分呈圓形，且靠近該第二開口之部分呈方形。 本發明之照明系統更可以包括連接該複數個發光單元之 一控制器，該控制器可獨立控制每一該複數個發光單元之亮 度，以個別提供每一該複數個發光單元所對應之該光照範圍所 需之光源亮度。 本發明亦提供了一種使用上述照明系統之投影裝置。 【實施方式】 圖一 A所示的投影裝置9包括了照明系統1，顯示元件2 及投影透鏡組3，用以投影形成一影像畫面4。影像畫面4首 先呈現於顯示元件2上，經照明系統1所提供的光線5照射穿 透後，投射至投影透鏡組3之上。投影透鏡組3可以將呈現於 顯示元件2之影像投影放大，而形成影像畫面4。顯示元件2 可為穿透式液晶面板。當然，本發明概念之應用並不限於使用 穿透式液晶面板的投影設備，如圖一 B及圖一 C所示，亦可 應用本發明之照明系統la或lb於使用反射式液晶面板2a(如 LCOS等）或數位微型反射式元件2b (DMD ’ Digital Micromirror Device)等其他顯示元件的投影設備。如圖一 B所示，反射式 液晶面板2a必需配合偏光分離稜鏡（PBS，Polarized Beam Splitter)30a使用。而數位微型反射式元件2b，如圖一 C所示， 則必需配合全内反射（TIR，Total Internal Reflect)梭鏡30b使 201104337 σ 照明系統1的細部構造’可藉由圖二Ait-步觀察之。 照明系統1乃是由多個發光單元η所組成，每-個發光單元 η包括了 -個發光二極體封裝結構nG及—個反射光管⑴。 發光單元u固定在電路板62上。反射光管iu具有二個開_The s-pole reflected by the polarizer is converted into p-polar light by the polarity conversion medium portion, and then reflected back to the polarizer. Each of the light emitting units further includes a lens that is combined with the package structure base to form a package structure. In order to converge the beam to the illumination range, each of the illumination units may further include a reflective light tube mounted before the package structure. The light pipe may have a first opening and a second opening, wherein the first opening is connected to the sending element, and the second opening σ is connected to the collecting lens. Before the reflected light pipe, a polarizer can be disposed to allow the light of the beam to penetrate, and the S pole light of the light beam is reflected back to the reflected light f, and the illumination system further includes a light reflected by the threat light. s Aurora transfer? The aurora-polarity transforming element 'sizes the aurora from the polarized limb to p-polar, and is reflected back to the polarizer by the retroreflector. The polarity conversion element may be a -polar conversion film disposed between the reflection tube and the display element; or may be a polarity conversion medium implanted in the reflection tube. In one embodiment, the reflective tube has an inner wall, and the inner wall is rounded near an opening of the 201104337, and the portion adjacent to the second opening is square. The illumination system of the present invention may further comprise a controller connected to the plurality of illumination units, the controller independently controlling the brightness of each of the plurality of illumination units to individually provide the illumination corresponding to each of the plurality of illumination units The brightness of the light source required for the range. The present invention also provides a projection apparatus using the above illumination system. [Embodiment] The projection device 9 shown in FIG. 1A includes an illumination system 1, a display element 2 and a projection lens group 3 for projecting to form an image frame 4. The image frame 4 is first displayed on the display element 2, and is illuminated by the light 5 supplied from the illumination system 1, and then projected onto the projection lens unit 3. The projection lens group 3 can enlarge the image projected on the display element 2 to form an image frame 4. The display element 2 can be a transmissive liquid crystal panel. Of course, the application of the inventive concept is not limited to the projection device using the transmissive liquid crystal panel. As shown in FIG. 1B and FIG. 1C, the illumination system 1a or 1b of the present invention can also be applied to the reflective liquid crystal panel 2a ( Projection devices such as LCOS, etc. or other display elements such as digital micro-reflective elements 2b (DMD 'Digital Micromirror Device). As shown in Fig. 1B, the reflective liquid crystal panel 2a must be used in conjunction with a PBS (Polarized Beam Splitter) 30a. The digital micro-reflective element 2b, as shown in FIG. 1C, must cooperate with the total internal reflection (TIR) shuttle 30b to make the detailed structure of the 201104337 σ illumination system 1 'observable by the Ait-step of FIG. It. The illumination system 1 is composed of a plurality of light-emitting units η, and each of the light-emitting units η includes a light-emitting diode package structure nG and a light-reflecting light tube (1). The light emitting unit u is fixed on the circuit board 62. Reflective light tube iu has two open _
1及1112。開口1111上安裝有發光二極體封裝結構110， 而開口 1112上則安裝有收束透鏡1〇2。如圖三所示，安裝於 電路板62上的發光單元"排列成一個二維陣列，而此―：維 陣列的分佈面積則大略與顯示元件2的面積相等。顯示元件2 被分割為若干個子區域2卜發光單元11是職這些子區域安 裝排列的，以便每一子區域21皆由一對應之發光單元丨i所發 出之光束51所照射’並恰可由該光束的發光範圍所涵蓋。收 束透鏡H)2可為單獨安裝於每_開口 1112上的透鏡單元亦 可將所有㈣束透鏡H)2 —體成祕1㈣㈣或其他材 質之上。除此之外，亦可如圖二B所示，將單一收束透鏡1〇2。 安裝於發光單元lGle所排成的陣列之前，並由該發光單元陣 列中之所有發光單元1 01 c共用收束透鏡1 〇2<?。 L E D燈雖然不像傳統投影機所用的函素燈一般，在操作時 會產生高溫，然而也會有一定的熱量需要被發散。一般在安裝 發光二極體封裝結構11〇與反射光管U1時，發光二極體封裝 結構110與開口 1111間會保持一段距離，以便LED發光時可 以散熱。所有的發光二極體封裝結構11〇被固定在電路板62 上，而反射光管111則以固定架丨2固定之，並以開口 nn對 201104337 準相對應的發光二極體結構1 1 0。固定架丨2的功能可用各種 不同的結構和形式實施，只要能達成各反射光管的固定和定位 即可。除了使用固定架之外，亦可在—完整結構上形成等同於 反射光管111工力能的多個孔洞，而安裝在發光二極體結構11〇 所形成的陣列之前。 傳統上使用於投影設備照明設備，如圖四所示，使用多顆 的led燈41的用意是為了增強其在顯示元件31上的照度， # 是故每顆LED燈41所發出的光束410在顯示元件31上必須 有P刀的又錯重疊。然而如此一來，光束41〇所需的光學路徑 勢必要有疋的距離，也因而不利整個投影設備的小型化。而 本案適用於小型化投影設備的優點可以由圖五觀察得知。自各 個發光單元11所射出的光束51組合成—光線5。其中，各光 束51的仃進方向彼此間大致是平行的對顯示元件Μ表面的 j線之偏移角很小，且照射於顯示元件2上所各自形成的光照 紐圍21彼此間大體上不互相重叠，而是各自涵蓋所對應的顯 :兀：2之子區域21。再加上光線5是直接照射並穿透位於 2光早％ u正前㈣顯示元件2，在在使得光線5所需的光 學路径之距離得以大幅的縮小，也因而大幅的縮小了投影裝置 9的體積。 ^、 备然’除了縮小光學路徑之外，如何提供足夠強度且昭射 Μ㈣束衫非常重要的。圖六_ 了發料元㈣一實施 發光早7L 8可如發光單元1 __般，由多個該單元排列成一 201104337 陣列式照明系統。發光單元8亦由封 裝、，，。構80及反射光管84 所，，且成。封裝結構8〇包括發光二 體曰曰片8卜封裝結構底座 鏡83、以及凹杯86。凹杯86為―杯觀射結構，形成 於封裝結構底座82上’而發光二極體晶片81則固定於凹杯 86的内部。相較於—般LED晴結構，發光二極體晶片η 由於放置於㈣的凹杯86底部，使凹_成為—個效果良好1 and 1112. A light emitting diode package structure 110 is mounted on the opening 1111, and a converging lens 1〇2 is mounted on the opening 1112. As shown in Fig. 3, the light-emitting units mounted on the circuit board 62 are arranged in a two-dimensional array, and the distribution area of the "-dimensional array" is roughly equal to the area of the display element 2. The display element 2 is divided into a plurality of sub-areas 2. The illumination unit 11 is arranged to be arranged so that each sub-area 21 is illuminated by a light beam 51 emitted by a corresponding illumination unit 丨i. The range of illumination of the beam is covered. The condensing lens H) 2 may be a lens unit that is separately mounted on each of the openings 1112 or all of the (four) lenticular lenses H) 2 may be formed on the first (four) (four) or other material. In addition to this, as shown in FIG. 2B, a single converging lens 1〇2 can be used. Installed before the array in which the light-emitting units 1Gle are arranged, and all of the light-emitting units 101c in the array of light-emitting units share the converging lens 1〇2<?. Although the L E D lamp does not have the same temperature as that of a conventional projector, it generates high temperatures during operation, but there is also a certain amount of heat that needs to be dissipated. Generally, when the LED package structure 11〇 and the reflection tube U1 are mounted, the LED package structure 110 and the opening 1111 are kept at a distance so that the LED can dissipate heat when emitting light. All of the LED packages 11 are fixed on the circuit board 62, and the light-reflecting tube 111 is fixed by the fixing frame 2, and the light-emitting diode structure corresponding to the opening nn is 201104337. . The function of the holder 2 can be implemented in a variety of different configurations and forms, as long as the fixing and positioning of the respective light pipes can be achieved. In addition to the use of the holder, a plurality of holes equivalent to the working force of the light-reflecting light pipe 111 can be formed on the entire structure, and installed in front of the array formed by the light-emitting diode structure 11A. Conventionally used in projection equipment lighting equipment, as shown in FIG. 4, the use of a plurality of led lamps 41 is intended to enhance the illumination on the display element 31, so that the light beam 410 emitted by each LED lamp 41 is There must be a misalignment of the P-knife on the display element 31. However, in this case, the optical path required for the light beam 41 is necessarily awkward, which is disadvantageous for miniaturization of the entire projection apparatus. The advantages of this case for small-scale projection equipment can be seen from Figure 5. The light beams 51 emitted from the respective light-emitting units 11 are combined into a light ray 5. The offset angles of the j-lines of the surface of the display element are substantially parallel to each other, and the illumination angles 21 formed on the display elements 2 are substantially not between each other. They overlap each other, but each covers the corresponding display: 兀: sub-region 21 of 2. In addition, the light 5 is directly irradiated and penetrates the display element 2 located at the front of the light, and the distance between the optical paths required for the light 5 is greatly reduced, thereby greatly reducing the projection device 9 volume of. ^, Becoming ‘In addition to narrowing the optical path, how to provide sufficient strength and the 射 Μ (4) pull-up is very important. Figure 6 _ The issuer (4) is implemented. The illumination 7L 8 can be arranged as a illuminating unit 1 __, and a plurality of the units are arranged into a 201104337 array illumination system. The light unit 8 is also packaged, and. The structure 80 and the light pipe 84 are formed. The package structure 8A includes a light-emitting diode piece 8 and a package structure base mirror 83, and a concave cup 86. The concave cup 86 is a "cup observation structure formed on the package structure base 82" and the light emitting diode wafer 81 is fixed inside the concave cup 86. Compared with the general LED clear structure, the light-emitting diode wafer η is placed in the bottom of the concave cup 86 of (4), so that the concave _ becomes a good effect.
的聚光結構，有效的縮小集中了發光二極體晶片Μ的發光範 圍。透鏡83安裝於封裝結構底座82上方㈣發光二極體晶 片81封裝於封裝結構8〇之内。透鏡83本身亦具有進一步收 斂發光二極體晶片81發光範圍的效果。 反射光管84包括了管狀本體84〇、圓形内壁841、方形内 壁842、開口 843、844，以及收束透鏡85。開口 843、m分 別位於管狀本體840的兩端，其中開口 843正對著封裝結構 80,而開口 844則是用來對準所欲照射的顯示元件。圓形内壁 841圍成一個圓柱形通道845，且使開〇料3呈圓形。方形内 壁842由四片傾斜壁所組成（圖六所示標號842者為其中二片 傾斜壁的剖面），該四片傾斜壁兩兩相對，且相鄰的傾斜壁彼 此相接，而圍成一個與前述圓柱形通道845相通之方椎形通道 846。該相接的四片傾斜壁且使開口 844呈方形。準此，由圓 柱形通道845與方椎形通道846所構成的光通道有兩大功能， 其一為，利用光線在通道内壁上的多次反射，使光均化。其二 則為使發光二極體晶片81原本的圓形發光面被整型為方形發 201104337 光面由於作為顯示元件（圖中未示）的液晶面板的形狀多為方 ^故反射光官84所提供的發光面整型功能，可使發光單元 8所發出的光束之截面形狀與顯示元件的形狀更為吻合，而減 少光線的逸散。尤其是當多個發光單元8組合成一個方陣型照 系’先時母發光單元8的方型發光面可使顯示元件充分的 為各發光單元8於其上的光照範圍所覆蓋，同時各光照範圍彼 此間又可更不易重疊，或即使稍有重疊，重疊部分的面積亦會 比圓形發光面者為更小。 收束透鏡85安裝於開口 844之上，而使射出發光單元8 的光束之分佈範圍更進一進的收斂。因此，由發光二極體晶片 81所發出的光線55 ,經過凹杯86、透鏡83、圓形内壁841、 方形内壁842，以及收束透鏡85的反射、聚光、勾化後其 光行進路徑與欲照射的顯示元件表面的法線幾為平行，使得發 光一極體晶片8所發出的光能量充分的被運用，而不致有因光 的逸散而導致照射於顯示元件上光線的強度不足的問題。此 外，由於被使用來作為顯示元件的液晶面板，在操作上，其入 射光線的人射角度是愈小愈好，而發光單it 11或發光單元8 所提供的光束，其行進方向可與液晶面板表面的法線方向幾乎 成平行，亦即提供了-擁有極小入射角度的光源，而使液晶面 板的性能可充分的發揮，產生清晰度極高的投影畫面。 上述凹杯86的聚光作用，由於是在封裝結構8〇之内進 行，即於承載發光二極晶體晶片8丨的封裝結構底座上直接形 201104337 成四杯86,在最靠近發光體之處直接進行聚光並收敛其發光 範圍，有別於-般傳統在封裝結構外才開始進行聚光的作法， 使光逸散的程度可大幅縮小。為更清楚閣示此一技術概念兹 以圖七及圖八所示之發光二極體封裝結構ιι〇之細部構造，來 作進-步例示說明。發光二極體封裝結構11Q包括了發光二極 體晶片8卜控制接腳7〇2、7〇3、封裝結構底座？！，以及透明 上蓋73。其中封裝結構底座7丨包括散熱座7ι〇以及絶緣外殼 70。散熱座710下方為一大圓盤，上方則為中心柱712。中心 柱712的表面有杯形反射結構72，而發光二極體晶片75則 固定於杯形反射結構72的底部。杯形反射結構72之深度，側 壁傾斜度及開口尺寸和形狀係足以為發光二極體晶片75之發 光範圍收斂集中成—光束。散熱座710的材質為金屬等導熱係 數大的材質’以便將發光二極體晶片75發光時所產生的熱傳 V至毛光一極體封裝結構11〇的外部。控制接腳犯、7〇3固 疋於絶緣外忒70上，且於結構上各自獨立，與散熱座7〇1在 、-構上並不相連，而是另外自發光二極體晶片Μ上拉導線（圖 中未示）出來分別與控制接腳7〇2、7G3連接，俾使發光二極體 晶片75得以藉控制接腳7〇2、7〇3接收電源及外部之控制訊 虎此種控制接腳與散熱座在結構上分離的發光二極體晶片封 裝方法^被通稱為，熱-電分離，，封裝方法。使用這種熱_電分 離方法封襄的封裝結構’由於晶片是置放在極易加工的金屬散 …、座上，故極適合運用本發明的技術概念，在散熱座上加工形 201104337 成深度足夠帶來良好聚光效果的杯形反射結構或凹杯。 由於顯不元件常常只能允許特定極性的光通過，例如液 晶面板只能接受p極光通過，造成s極光無法利用而影響光使 用效率。解決的辦法是可在顯示元件與光源間的光行進路徑 上，放置極性轉化元件，並於極性轉化介質前放置偏極片，以 回收並再利用S極光。極性轉化元件可以是一片極性轉化薄 膜，亦可以是注入封裝結構底座的杯形反射結構/凹杯或反射 光管内，可改變光極性的極性轉化介質。請參見圖二A及圖 二B。在組裝照明系統1或ic時，發光二極體封裝結構 或ll〇c被固定至電路板62或62(：上，而反射光管lu或n〇c 則以固定架12或12c固定之。若要在反射光管ln内灌入極 性轉化介質112，則開口 1111可以用透明物（圖中未示）封住。 遠極性轉化介質112可為加入微粒的膠或液晶等，可以將s極 光轉化為p極光。然後，以收束透鏡102密接於開口 ni2以 防極性轉化介質112滲漏。俟所有發光單元丨丨以上述程序安 裝完畢之後，再在所有收束透鏡1〇2前端安裝一偏極片61， 該偏極片61可容許P極光通過，而反射回s極光。被反射回 來的S極光有部分會被極性轉化介質U2轉化為p極光，經反 射光管111的反射後再度被送至偏極片61，此時被轉化成p 極的光就可通過偏極片61而被利用。若光線5〇ι是第一次被 傳送至偏極片61的光線’其中同時包含p極光502及s極光 503則P極光502會通過偏極片，而s極光503會被反射回 12 201104337 反射光管111内部。假設被反射回來的S極光503有二分之一 被所灌入的極性轉化介質112轉化為p極光5〇5，則5極光503 被反射光管111内壁反射後成為光線504，並再度回到偏極片 61時’光線504中已被轉化的P極光505會通過，而未被轉 化的S極光則再度被反射回反射光管111内部，並再有二分之 一被轉化。如此反覆的反射/轉化程序，並假設第一次通過偏 極片61的P極光5〇2的量為P，則原光線5〇1最後通過偏極 片61的光線的量’會是p的丨+ 1/2 + 1/4 + 1/8 + 1/16+,“ 倍。其中，被反射回來的S極光每次轉成p極光的轉化率，會 因極性轉化介質性質的不同而變化。當轉化率為1 /2時，則通 過偏極片61的P極光會趨近原來不回收的2倍，亦即幾乎所 有原來的S極光已由此回收機制完全轉化為p光而被充分利 用，可見此種光回收機制可以得到相當不錯的成效。當此種機 制應用在封裝結構底座的凹杯或杯形反射結構時，只要將此極 性轉化介質注入凹杯/杯形反射結構中，再密封住凹杯/杯形反 射結構開口即可。當使用極性轉化薄膜為極性轉化元件時，其 安裝位置可如圖二B所示，在反射光管與顯示元件之間。圖二 B的女裝於收束透鏡i〇2c與偏極片61c間的極性轉化薄膜 l〇2c僅為例示，極性轉化薄膜1〇2c亦可安裝於偏極片Me與 反射光官111c間的其他位置，或是安裝在如圖二A所示的照 明系統1之偏極片61與反射光管ln之間。當然，當安裝了 極性轉化薄膜1〇2c後，反射光管m内就不需再注入極性轉 13 201104337 化介質112。 别述的種種發光角度收斂或光回收的機制，使得光的使 用效率大為提昇，然而，若能更進—步節省光源所使用的能 源’則對《彡機小魏/可攜化的設計料更有助益。傳統的The concentrating structure effectively reduces the illuminating range of the illuminating diode chip. The lens 83 is mounted on the package structure base 82. (4) The LED array 81 is packaged within the package structure 8A. The lens 83 itself also has the effect of further converging the light-emitting range of the light-emitting diode wafer 81. The light reflecting tube 84 includes a tubular body 84A, a circular inner wall 841, a square inner wall 842, openings 843, 844, and a converging lens 85. Openings 843, m are located at opposite ends of tubular body 840, with opening 843 facing the package structure 80 and opening 844 for aligning the display elements to be illuminated. The circular inner wall 841 encloses a cylindrical passage 845 and makes the split material 3 circular. The square inner wall 842 is composed of four inclined walls (the reference numeral 842 shown in FIG. 6 is a cross section of two inclined walls), the four inclined walls are opposite to each other, and the adjacent inclined walls are connected to each other, and are enclosed. A square-shaped channel 846 that communicates with the aforementioned cylindrical passage 845. The four inclined walls are joined and the opening 844 is square. Accordingly, the optical passage formed by the cylindrical passage 845 and the square-shaped passage 846 has two major functions, one of which is to make the light uniform by utilizing multiple reflections of light on the inner wall of the passage. The second is to make the original circular light-emitting surface of the light-emitting diode chip 81 into a square shape 201104337. The surface of the liquid crystal panel as a display element (not shown) is mostly a reflection light officer 84. The provided light surface shaping function can make the cross-sectional shape of the light beam emitted by the light-emitting unit 8 more consistent with the shape of the display element, and reduce the escape of light. In particular, when the plurality of light-emitting units 8 are combined into a square matrix system, the square-shaped light-emitting surface of the first-time mother-emitting unit 8 can sufficiently cover the display elements for the illumination range of the light-emitting units 8 thereon, and at the same time, each illumination The ranges are more difficult to overlap with each other, or even with a slight overlap, the area of the overlapping portion is smaller than that of the circular light emitting surface. The converging lens 85 is mounted above the opening 844 to make the distribution of the light beam exiting the light-emitting unit 8 more convergent. Therefore, the light 55 emitted by the LED chip 81 passes through the concave cup 86, the lens 83, the circular inner wall 841, the square inner wall 842, and the reflection, condensing, and branching of the condensing lens 85. It is parallel with the normal line of the surface of the display element to be illuminated, so that the light energy emitted by the light-emitting one-pole wafer 8 is fully utilized, and the intensity of light irradiated on the display element is insufficient due to the escape of light. The problem. In addition, since the liquid crystal panel used as the display element is operated, the angle of incidence of the incident light is as small as possible, and the light beam provided by the light-emitting unit 11 or the light-emitting unit 8 can travel with the liquid crystal. The normal direction of the panel surface is almost parallel, that is, providing a light source with a very small incident angle, so that the performance of the liquid crystal panel can be fully exerted, resulting in a projection image with extremely high definition. The concentrating effect of the concave cup 86 is performed within the package structure 8〇, that is, directly forming 201104337 into a four-cup 86 on the package structure base carrying the LED substrate 8丨, in the place closest to the illuminator Directly concentrating and converging its illuminating range is different from the conventional practice of concentrating light outside the package structure, so that the degree of light escaping can be greatly reduced. In order to clarify this technical concept, the detailed structure of the light-emitting diode package structure ιι〇 shown in FIG. 7 and FIG. 8 is described as an example. The LED package 11Q includes a light-emitting diode chip 8 control pins 7〇2, 7〇3, and a package structure base. ! And a transparent upper cover 73. The package structure base 7 includes a heat sink 7 〇 and an insulating case 70. Below the heat sink 710 is a large disc, and above it is a center post 712. The surface of the center pillar 712 has a cup-shaped reflecting structure 72, and the light-emitting diode wafer 75 is fixed to the bottom of the cup-shaped reflecting structure 72. The depth of the cup-shaped reflecting structure 72, the slope of the side walls, and the size and shape of the opening are sufficient to converge the light-emitting range of the light-emitting diode wafer 75 into a light beam. The heat sink 710 is made of a material having a large thermal conductivity such as metal, so that the heat generated when the light-emitting diode wafer 75 emits light is transmitted to the outside of the glare-package structure 11 〇. The control pin is made, and the 7〇3 is fixed on the insulating outer casing 70, and is independent in structure, and is not connected to the heat sink 7〇1, and is not connected to the structure, but is separately mounted on the self-luminous diode chip. Pulling wires (not shown) are respectively connected to the control pins 7〇2 and 7G3, so that the light-emitting diode chip 75 can receive power and external control by the control pins 7〇2 and 7〇3. A light-emitting diode package method in which a control pin and a heat sink are structurally separated is generally referred to as a thermo-electric separation, a packaging method. The package structure is sealed by using this thermal-electrical separation method. Since the wafer is placed on a metal body that is easy to process, it is very suitable to apply the technical concept of the present invention to form a depth of 201104337 on the heat sink. A cup-shaped reflective structure or concave cup sufficient for a good concentrating effect. Since the display component often only allows light of a specific polarity to pass, for example, the liquid crystal panel can only accept the passage of p-polar light, which causes the s-polar light to be unusable and affects the light use efficiency. The solution is to place a polar conversion element on the path of light travel between the display element and the light source and place a polarizer in front of the polarity conversion medium to recover and reuse the S aurora. The polar conversion element can be a piece of polar conversion film or a cup-shaped reflective structure/concave or reflective tube that is injected into the base of the package structure to change the polar polarity of the light conversion medium. Please refer to Figure 2A and Figure 2B. When assembling the illumination system 1 or ic, the LED package structure or ll〇c is fixed to the circuit board 62 or 62 (:, and the reflection tube lu or n〇c is fixed by the holder 12 or 12c. To inject the polar conversion medium 112 into the reflection tube ln, the opening 1111 can be sealed with a transparent material (not shown). The far polarity conversion medium 112 can be a particle-added glue or liquid crystal, etc. Converted to p aurora. Then, the converging lens 102 is in close contact with the opening ni2 to prevent the polarity conversion medium 112 from leaking. After all the light-emitting units are installed by the above procedure, a front end of all the converging lenses 1〇2 is installed. The polarizer 61 can allow the P apolar light to pass through and reflect back to the s apolar light. A portion of the reflected S apolar light is converted into a p apolar light by the polar conversion medium U2, and is reflected by the reflected light pipe 111 again. It is sent to the polarizer 61, and the light converted into the p-pole at this time can be utilized by the polarizer 61. If the light 5〇 is the light that is transmitted to the polarizer 61 for the first time, P aurora 502 and s aurora 503, then P aurora 502 will pass through the pole piece, The s Aurora 503 is reflected back to the interior of the 12 201104337 reflected light pipe 111. Assuming that one-half of the reflected S-polar light 503 is converted into p-polar light 5〇5 by the injected polar conversion medium 112, the 5-pole light 503 is After the inner wall of the reflective light pipe 111 is reflected, it becomes the light ray 504, and when it returns to the polarizing plate 61 again, the P apolar light 505 that has been converted in the light ray 504 passes, and the unconverted S apolar light is again reflected back to the reflected light pipe 111. Internally, and then one-half is converted. Such a repetitive reflection/conversion procedure, and assuming that the amount of P apole 5 〇 2 passing through the polarizer 61 for the first time is P, the original ray 5 〇 1 finally passes through the partial The amount of light of the pole piece 61 will be 丨+ 1/2 + 1/4 + 1/8 + 1/16+ of p, "folding. Among them, the converted S-polar light is converted into p-polar light each time. The rate will vary depending on the nature of the polar conversion medium. When the conversion rate is 1 /2, the P apolar light passing through the polarizer 61 will approach twice the original recovery, that is, almost all of the original S aurora has The recycling mechanism is fully converted to p-light and is fully utilized. It can be seen that such a light recovery mechanism can be obtained quite well. When such a mechanism is applied to a concave cup or a cup-shaped reflective structure of a package structure base, the polar conversion medium is injected into the concave cup/cup reflection structure, and the concave cup/cup reflection structure opening is sealed. When the polarity conversion film is used as the polarity conversion element, the installation position can be between the reflection tube and the display element as shown in Fig. 2B. The women's clothing in Fig. 2B is in the converging lens i〇2c and the polarizer 61c. The polarity conversion film l〇2c is merely an example, and the polarity conversion film 1〇2c may be installed at other positions between the polarizer sheet Me and the reflection light officer 111c, or may be installed in the illumination system 1 as shown in FIG. Between the polarizer 61 and the light pipe ln. Of course, when the polarity conversion film 1〇2c is installed, it is not necessary to inject the polarity into the reflection tube m. The various illuminating angle convergence or light recovery mechanisms make the use efficiency of light greatly improved. However, if we can further save the energy used by the light source, then we will design the "small Wei/portable". It is more helpful. traditional
投影機光源，在投影機操作時光源自始至終全部是開啟的，亮 度亦是固定的，若投影晝面中有黑色或較暗的部分亦全靠顯示 疋件來控制。本發明提出—種全新概念，亦即藉由控制投影機 光源的明暗程度來呈現投影畫面中所需的明暗。由於發光二極 體晶片有極快的反應速度，因此使得此概㈣實施更為容易。 當投影畫面有全黑畫面時，關掉全部的投影機光源。當整個投 影畫面在某-灰暗的亮度值時，將整體光源的亮度由全亮狀態 降低至足夠呈現該灰暗亮度值即可。請參看圖五，當某一發光 晝面被偵測到為全 單元11的光照範圍21所對應到的局部投影 黑或可由某—亮度值來表現時，則關掉該發光單元11或將該 發光單it 11的亮度調至足以呈現該亮度值。如此__來藉由 關掉或降低全部或部分發光單元n亮度所節省的能源，將大 大提昇整個投影裝置9的能源使賴率，也更有助益於其小型 或可揣化的特性。圖九為控制照明系統丨亮度的硬體示意 圖控制器6連接至每一個封裳結構j j 〇的控制接腳搬广〇3 , 以個別控制其明亮度。在操作時，控制器6先分析整個投影畫 面或各光照範圍21所對應的亮度值，再依所分析結果控制各 發光一極體封裝結構11〇内的發光二極體晶片75發出適當的 201104337 亮度，同時分析下一投影畫面的整體/局部亮度值，以便於下 一個操作時脈中進行控制。除了控制亮度之外，若發光二極體 晶片75為可以分別發出R、G、B三種不同顏色之光線的多個 發光二極體晶片時，控制器6可藉控制R/G/B晶片於不同的時 序發光。此種分時顯示R/G/B三原色的作法可以取代傳統濾色 鏡（color filter)的功能。而由於不需使用滤色鏡，可使投影畫 面的解析度提高三倍。 • 在本發明創作的技術架構之下，顯示元件可選用（但不限 於）一般手機等手持裝置所使用的低溫多晶矽（LTPS，Low Temperature Poly Silicon)液晶面板即可，不需（但不限制）使用 高溫多晶矽（HTPS)液晶面板等價昂之產品，不但可節省成本， 同時亦替LTPS面板開拓了新的應用領域。同時，由於光使用 效率的提昇，在發光元件方面亦可選用（但不限於）市場接受度 高且較為平價的類似LUXEON的熱-電分離式LED發光元 • 件，而不需（但不限制）特別選擇高亮度但價格亦較高的如 CREE的LED發光元件。由於這些關鍵元件的價格可壓低，故 也使運用本發明所製造的投影裝置能夠有較高的市場接受度。 綜上所述，本發明提出全新的技術概念及架構，縮短了 投影裝置照明系統的成像光源之光學路徑，同時提昇照明光源 的光及能源使用效率，而使投影裝置的小型化/可攜化的程度 大大的提高，且可使用更為通用/價廉的發光/顯示元件，大幅 降低所需成本，為投影機/發光二極體元件/液晶面板產業的應 15 201104337 用及市場帶來了革命性的變革，實為—極具產業價值之發明。 上述各實施僅為說明而非限制本發明，熟習本發明技術之人士 知·以其他方式變化實施之，然皆不脫申請專利範圍所欲保護之 範_。 【圖式簡單說明】 圖一 A為根據本發明技術概念之投影裝置實施例系統示意圖。 圖一 B及圖一 C為根據本發明技術概念之投影裝置另二實施 例之系統示意圖。 圖—A為根據本發明技術概念之投影機照明系統之實施例之 剖面圖。 圖一 B為根據本發明技術概念之投影機照明系統之另一實施 例之剖面圖。 圖三為顯示元件子區域與所對應發光單元之示意圖。 圖四為習知投影機照明系統之照明光路徑示意圖。 圖五為根據本發明技術概念之投影機照明系統之照明光路徑 示意圖。 圖六為根據本發明技術概念之投影機照明系統之發光單元之 另—貫施例之剖面圖。 圖七為圖二A所示之發光二極體封裝結構之立體分解圖。 巴乂為圖一 A所示之發光二極體封裝結構之剖面圖。 圖九為圖二A所示之照明系統之控制線路示意圖。 201104337 【主要元件符號說明】 1、 la、lb、lc照明系統 11發光單元 102、102c收束透鏡 110、 110c發光二極體封裝結構The projector light source is turned on all the way from the beginning to the end of the projector operation, and the brightness is also fixed. If there is black or dark part in the projection surface, it is controlled by the display element. The present invention proposes a new concept of rendering the desired brightness in the projected picture by controlling the brightness of the projector source. Since the light-emitting diode wafer has an extremely fast reaction speed, this (4) implementation is made easier. When the projection screen has a full black screen, turn off all projector light sources. When the entire projected picture is at a certain darkness, the brightness of the overall light source is reduced from the full light state to a value sufficient to exhibit the dark brightness value. Referring to FIG. 5, when a certain illuminated surface is detected as a partial projection black corresponding to the illumination range 21 of the full unit 11, or may be represented by a certain brightness value, the illumination unit 11 is turned off or The brightness of the illumination unit it 11 is adjusted to be sufficient to present the brightness value. In this way, the energy saved by turning off or reducing the brightness of all or part of the light-emitting unit n will greatly increase the energy consumption of the entire projection device 9, and is also more conducive to its small or degradable characteristics. Figure 9 is a hardware schematic diagram for controlling the brightness of the illumination system. The controller 6 is connected to each of the control pins j j 〇 to control the brightness thereof. In operation, the controller 6 first analyzes the brightness value corresponding to the entire projection picture or each illumination range 21, and then controls the LEDs 75 in each of the light-emitting diode packages 11 to emit an appropriate 201104337 according to the analysis result. Brightness, while analyzing the overall/local brightness value of the next projected picture for control in the next operating clock. In addition to controlling the brightness, if the LED chip 75 is a plurality of LED chips that can respectively emit light of three different colors of R, G, and B, the controller 6 can control the R/G/B chip. Different timings illuminate. This time-sharing display of the R/G/B primaries can replace the function of a conventional color filter. Since the color filter is not required, the resolution of the projection screen can be increased by three times. • Under the technical framework created by the present invention, the display component can be selected from, but not limited to, a low temperature polysilicon (LTPS) liquid crystal panel used in a handheld device such as a general mobile phone, without (but not limited to) The use of high-temperature polycrystalline silicon (HTPS) liquid crystal panels is not only cost-effective, but also opens up new applications for LTPS panels. At the same time, due to the improvement of light use efficiency, it is possible to select (but not limited to) LUXEON-like thermo-electrically separated LED illuminators, which are highly acceptable and relatively inexpensive, without (but not limited to) ) Specially select high-brightness but high-priced LED light-emitting components such as CREE. Since the price of these key components can be lowered, the projection apparatus manufactured by the present invention can also have a high market acceptance. In summary, the present invention proposes a new technical concept and architecture, shortens the optical path of the imaging light source of the projection device illumination system, and improves the light and energy use efficiency of the illumination source, thereby miniaturizing/portable the projection device. The degree of the improvement is greatly improved, and the more general-purpose/cost-effective light-emitting/display elements can be used, which greatly reduces the required cost, and brings the market and the market to the projector/light-emitting diode element/liquid crystal panel industry 15 201104337 The revolutionary change is actually an invention of great industrial value. The above-described embodiments are merely illustrative and not restrictive, and those skilled in the art will be able to implement the invention in other ways, without departing from the scope of the claimed invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a schematic diagram of a system of an embodiment of a projection apparatus according to the technical concept of the present invention. Fig. 1B and Fig. 1C are schematic diagrams showing a system of another embodiment of a projection apparatus according to the technical concept of the present invention. Figure-A is a cross-sectional view of an embodiment of a projector illumination system in accordance with the teachings of the present invention. Figure 1B is a cross-sectional view showing another embodiment of a projector illumination system in accordance with the technical concept of the present invention. FIG. 3 is a schematic diagram showing the sub-region of the component and the corresponding light-emitting unit. FIG. 4 is a schematic diagram of an illumination light path of a conventional projector illumination system. Figure 5 is a schematic illustration of an illumination light path of a projector illumination system in accordance with the teachings of the present invention. Figure 6 is a cross-sectional view showing another embodiment of the light-emitting unit of the projector illumination system according to the technical concept of the present invention. FIG. 7 is an exploded perspective view of the light emitting diode package structure shown in FIG. 2A. Bayu is a cross-sectional view of the light-emitting diode package structure shown in FIG. Figure 9 is a schematic diagram of the control circuit of the lighting system shown in Figure 2A. 201104337 [Description of main components] 1. La, lb, lc illumination system 11 illumination unit 102, 102c converging lens 110, 110c LED package structure
111、 111 c反射光管 112極性轉化介質 112c極性轉化薄膜 12、12c固定架 2、 2a、2b顯示元件 21子區域 3、 3a、3b投影透鏡組 30a、30b 棱鏡 4影像畫面 5光線 51光束 511光照範圍 6控制器 61、 61c偏極片 62、 62c電路板 70絶緣外殼 702、703控制接腳 17 201104337 71封裝結構底座 710散熱座 712中心柱 72杯形反射結構 73透明上蓋 75發光二極體晶片 8發光單元 • 80封裝結構 81發光二極體晶片 82封裝結構底座 83透鏡 84反射光管 840管狀本體 841圓形内壁 φ 842方形内壁 843、844 開口 85收束透鏡 86凹杯 9投影裝置111, 111 c reflected light pipe 112 polarity conversion medium 112c polarity conversion film 12, 12c holder 2, 2a, 2b display element 21 sub-area 3, 3a, 3b projection lens group 30a, 30b prism 4 image picture 5 light 51 beam 511 Illumination range 6 controller 61, 61c polarizer 62, 62c circuit board 70 insulation housing 702, 703 control pin 17 201104337 71 package structure base 710 heat sink 712 center column 72 cup-shaped reflection structure 73 transparent cover 75 light-emitting diode Wafer 8 Light Emitting Unit • 80 Package Structure 81 Light Emitting Diode Wafer 82 Package Structure Base 83 Lens 84 Reflect Light Tube 840 Tubular Body 841 Round Inner Wall φ 842 Square Inner Wall 843, 844 Opening 85 Converging Lens 86 Concave Cup 9 Projector