TWI845746B - Wavelength conversion member and light source module - Google Patents
Wavelength conversion member and light source module Download PDFInfo
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- TWI845746B TWI845746B TW109128366A TW109128366A TWI845746B TW I845746 B TWI845746 B TW I845746B TW 109128366 A TW109128366 A TW 109128366A TW 109128366 A TW109128366 A TW 109128366A TW I845746 B TWI845746 B TW I845746B
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Abstract
Description
本發明是有關於一種波長轉換元件以及光源模組。The present invention relates to a wavelength conversion element and a light source module.
近年來，光學投影機已經被應用於許多領域之中，且應用範圍也日漸擴大，例如從消費性產品到高科技設備。各種的光學投影機也被廣泛應用於學校、家庭和商業場合，以將信號源所提供的顯示圖案放大，並顯示在投影屏幕上。In recent years, optical projectors have been used in many fields, and the scope of application has been gradually expanded, such as from consumer products to high-tech equipment. Various optical projectors are also widely used in schools, homes and commercial occasions to enlarge the display pattern provided by the signal source and display it on the projection screen.
對於光學投影機的光源配置而言，其可以是藉由固態雷射光源驅使螢光材料發光。對此，可將螢光材料塗佈在輪盤上，並利用馬達帶動輪盤致使其高速旋轉，藉以使得螢光材料於單位時間內接受到的雷射光源能量降低，從而達到散熱的目的。然而，隨著光學投影機的亮度需求不斷升高，對於螢光材料的散熱需求也趨漸嚴苛。因此，如何能使輪盤及其上的螢光材料有更佳的散熱方式，已成為當前重要的研發課題之一。As for the light source configuration of the optical projector, it can be that a solid-state laser light source drives the fluorescent material to emit light. For this, the fluorescent material can be coated on a wheel, and a motor can be used to drive the wheel to rotate at high speed, so that the laser light source energy received by the fluorescent material per unit time is reduced, thereby achieving the purpose of heat dissipation. However, as the brightness requirements of optical projectors continue to increase, the heat dissipation requirements for fluorescent materials are also becoming increasingly stringent. Therefore, how to make the wheel and the fluorescent material on it have a better heat dissipation method has become one of the important research and development topics at present.
有鑑於此，本發明之一目的在於提出一種可有解決上述問題的波長轉換元件以及光源模組。In view of this, one object of the present invention is to provide a wavelength conversion element and a light source module that can solve the above problems.
為了達到上述目的，依據本發明之一實施方式，一種波長轉換元件包含基板、螢光粉層以及通孔性葉片。基板配置以基於一軸線轉動。螢光粉層設置於基板上。通孔性葉片設置於基板上，並具有介於10 ppi至500 ppi之孔隙密度，或具有介於5%至95%之體積孔隙率。To achieve the above object, according to one embodiment of the present invention, a wavelength conversion element comprises a substrate, a fluorescent powder layer and a through-hole blade. The substrate is configured to rotate based on an axis. The fluorescent powder layer is disposed on the substrate. The through-hole blade is disposed on the substrate and has a pore density between 10 ppi and 500 ppi, or a volume porosity between 5% and 95%.
於本發明的一或多個實施方式中，螢光粉層與通孔性葉片分別位於基板的相反兩側。In one or more embodiments of the present invention, the fluorescent powder layer and the through-hole blade are located on opposite sides of the substrate.
於本發明的一或多個實施方式中，螢光粉層與通孔性葉片分別投影至基板的正投影係至少部分重疊。In one or more embodiments of the present invention, the orthographic projections of the fluorescent powder layer and the through-hole blade respectively projected onto the substrate at least partially overlap.
於本發明的一或多個實施方式中，螢光粉層與通孔性葉片位於基板的同一側。In one or more embodiments of the present invention, the fluorescent powder layer and the through-hole blade are located on the same side of the substrate.
於本發明的一或多個實施方式中，波長轉換元件進一步包含兩個通孔性葉片。通孔性葉片分別位於基板的相反兩側。In one or more embodiments of the present invention, the wavelength conversion element further comprises two through-hole blades, which are respectively located on opposite sides of the substrate.
於本發明的一或多個實施方式中，通孔性葉片的材料包含金屬、陶瓷以及玻璃中之至少一者。In one or more embodiments of the present invention, the material of the through-hole blade includes at least one of metal, ceramic and glass.
於本發明的一或多個實施方式中，基板包含金屬材料。金屬材料包含Al、Ag、Cu、Fe以及Mo中之至少一者。In one or more embodiments of the present invention, the substrate comprises a metal material, and the metal material comprises at least one of Al, Ag, Cu, Fe and Mo.
於本發明的一或多個實施方式中，基板包含陶瓷材料。陶瓷材料包含AIN、BN、SiC或Al2 O3 。In one or more embodiments of the present invention, the substrate comprises a ceramic material, which comprises AlN, BN, SiC or Al 2 O 3 .
於本發明的一或多個實施方式中，基板包含半導體材料。半導體材料包含Si、Ge、GaAs、InP、GaN、InAs、ZnSe、ZnS或InSe。In one or more embodiments of the present invention, the substrate comprises a semiconductor material. The semiconductor material comprises Si, Ge, GaAs, InP, GaN, InAs, ZnSe, ZnS or InSe.
於本發明的一或多個實施方式中，基板的材料包含玻璃、石英、藍寶石或CaF2 。In one or more embodiments of the present invention, the material of the substrate includes glass, quartz, sapphire or CaF 2 .
於本發明的一或多個實施方式中，波長轉換元件包含非通孔性葉片以替換通孔性葉片。非通孔性葉片具有介於5 µm至1.25 mm之粗糙度，或者非通孔性葉片的比表面積大於非通孔性葉片的幾何面積的10%以上。In one or more embodiments of the present invention, the wavelength conversion element includes a non-porous blade to replace the porous blade. The non-porous blade has a roughness ranging from 5 μm to 1.25 mm, or the specific surface area of the non-porous blade is greater than 10% of the geometric area of the non-porous blade.
為了達到上述目的，依據本發明之一實施方式，一種光源模組包含光源、前述波長轉換元件以及驅動單元。光源配置以發射光線。前述波長轉換元件配置以接收光線。驅動單元銜接波長轉換元件，並配置以驅動波長轉換元件基於軸線轉動。通孔性葉片具有整體幾何形狀。當驅動單元驅動基板轉動時，整體幾何形狀得以產生擾流，且通孔性葉片的通孔同時引導出微型渦流。In order to achieve the above-mentioned purpose, according to one embodiment of the present invention, a light source module includes a light source, the aforementioned wavelength conversion element and a driving unit. The light source is configured to emit light. The aforementioned wavelength conversion element is configured to receive light. The driving unit is connected to the wavelength conversion element and is configured to drive the wavelength conversion element to rotate based on an axis. The through-hole blade has an overall geometric shape. When the driving unit drives the substrate to rotate, the overall geometric shape is able to generate turbulence, and the through holes of the through-hole blade simultaneously guide micro-vortices.
綜上所述，於本發明的波長轉換元件中，設置於基板上的葉片的局部區域具有渦流產生功能。除了整體葉片幾何形狀的擾流機制，葉片材料或機構設計可再引導微型渦流效應，加速提升投影裝置整體內部腔體氣擾流作用，因此葉片尺寸與重量能大幅降低，減緩驅動單元的負載功率。葉片可為通孔性葉片，其可在高速氣流通過通孔後產生渦流產生效應；葉片也可為高粗糙度或高比表面積的非通孔性葉片，其可在高速氣流撞擊表面結構後產生渦流產生效應。In summary, in the wavelength conversion element of the present invention, the local area of the blade disposed on the substrate has a vortex generation function. In addition to the turbulence mechanism of the overall blade geometry, the blade material or mechanism design can further guide the micro-vortex effect, accelerating the overall internal cavity air turbulence effect of the projection device, so that the blade size and weight can be greatly reduced, reducing the load power of the drive unit. The blade can be a through-hole blade, which can generate a vortex generation effect after the high-speed airflow passes through the through hole; the blade can also be a non-through-hole blade with high roughness or high specific surface area, which can generate a vortex generation effect after the high-speed airflow hits the surface structure.
以上所述僅係用以闡述本發明所欲解決的問題、解決問題的技術手段、及其產生的功效等等，本發明之具體細節將在下文的實施方式及相關圖式中詳細介紹。The above description is only used to explain the problem to be solved by the present invention, the technical means for solving the problem, and the effects produced, etc. The specific details of the present invention will be introduced in detail in the following implementation method and related drawings.
以下將以圖式揭露本發明之複數個實施方式，為明確說明起見，許多實務上的細節將在以下敘述中一併說明。然而，應瞭解到，這些實務上的細節不應用以限制本發明。也就是說，在本發明部分實施方式中，這些實務上的細節是非必要的。此外，為簡化圖式起見，一些習知慣用的結構與元件在圖式中將以簡單示意的方式繪示之。The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some commonly used structures and components will be shown in the drawings in a simple schematic manner.
請參照第1圖。第1圖為應用於投影裝置內的光源模組，包含波長轉換元件120、驅動單元130以及光源140。波長轉換元件120包含基板121。基板121具有軸孔121a。驅動單元130銜接波長轉換元件120，並配置以驅動波長轉換元件120基於軸線A轉動。具體來說，驅動單元130例如為馬達，並具有轉軸131。轉軸131卡合於軸孔121a的內緣。轉軸131的中心軸為軸線A。藉由馬達的轉軸131轉動，即可驅動波長轉換元件120基於軸線A轉動。光源140配置以發射光線，並形成一光斑固定地照射於基板121上。於一些實施方式中，光源140為固態雷射光源140，但本發明並不以此為限。Please refer to Figure 1. Figure 1 is a light source module used in a projection device, including a wavelength conversion element 120, a driving unit 130 and a light source 140. The wavelength conversion element 120 includes a substrate 121. The substrate 121 has an axial hole 121a. The driving unit 130 is connected to the wavelength conversion element 120 and is configured to drive the wavelength conversion element 120 to rotate based on an axis A. Specifically, the driving unit 130 is, for example, a motor and has a rotating shaft 131. The rotating shaft 131 is engaged with the inner edge of the axial hole 121a. The central axis of the rotating shaft 131 is the axis A. By rotating the rotating shaft 131 of the motor, the wavelength conversion element 120 can be driven to rotate based on the axis A. The light source 140 is configured to emit light and form a light spot to be fixedly irradiated on the substrate 121. In some embodiments, the light source 140 is a solid-state laser light source 140, but the present invention is not limited thereto.
波長轉換元件120進一步包含螢光粉層122。螢光粉層122設置於基板121上，並配置以接收光源140所發射的光線。具體來說，光源140所發射的光線可經由特定設計之光路（例如，反射鏡、分光鏡…等）抵達螢光粉層122，並於螢光粉層122上產生光斑。螢光粉層122實質上沿著環狀路徑設置於基板121上。藉此，當波長轉換元件120繞著軸線A轉動時，光源140所產生的光斑即可持續地照射在螢光粉層122上。The wavelength conversion element 120 further includes a fluorescent powder layer 122. The fluorescent powder layer 122 is disposed on the substrate 121 and is configured to receive light emitted by the light source 140. Specifically, the light emitted by the light source 140 can reach the fluorescent powder layer 122 via a specially designed optical path (e.g., a reflector, a spectroscope, etc.), and generate a light spot on the fluorescent powder layer 122. The fluorescent powder layer 122 is substantially disposed on the substrate 121 along a circular path. Thus, when the wavelength conversion element 120 rotates around the axis A, the light spot generated by the light source 140 can continuously irradiate the fluorescent powder layer 122.
請參照第2圖以及第3圖。第2圖為繪示第1圖中之波長轉換元件120的底視圖。第3圖為繪示第1圖中之波長轉換元件120沿著線段3-3的剖面圖。如第2圖與第3圖所示，於本實施方式中，波長轉換元件120進一步包含通孔性葉片123。通孔性葉片123緊貼於基板121上，並具有介於10 ppi至500 ppi之孔隙密度，或具有介於5%至95%之體積孔隙率。要說明的是，上述緊貼不應排除通孔性葉片123與基板121之間存在一中間物質的情況，例如存在一導熱介面、固定件或是黏膠等情況，主要是讓通孔性葉片123固定在基板121上，得以傳遞基板121過來的熱量，而又可以隨著基板121進行運動者。Please refer to FIG. 2 and FIG. 3. FIG. 2 is a bottom view of the wavelength conversion element 120 in FIG. 1. FIG. 3 is a cross-sectional view of the wavelength conversion element 120 along line segment 3-3 in FIG. 1. As shown in FIG. 2 and FIG. 3, in this embodiment, the wavelength conversion element 120 further includes a through-hole blade 123. The through-hole blade 123 is closely attached to the substrate 121 and has a pore density between 10 ppi and 500 ppi, or has a volume porosity between 5% and 95%. It should be noted that the above-mentioned close contact should not exclude the existence of an intermediate substance between the through-hole blade 123 and the substrate 121, such as a thermally conductive interface, a fixing part or an adhesive, etc. The main purpose is to fix the through-hole blade 123 on the substrate 121 so as to transfer the heat from the substrate 121 and to move along with the substrate 121.
於一些實施方式中，通孔性葉片123的材料包含金屬、陶瓷以及玻璃中之至少一者。舉例來說，通孔性葉片123可以是具有通孔的泡沫金屬結構（例如泡沫銅），又或者是為纏繞態樣的金屬絲線結構(例如銅絲或鋼絲)，但本發明並不以此為限。In some embodiments, the material of the through-hole blade 123 includes at least one of metal, ceramic and glass. For example, the through-hole blade 123 can be a foam metal structure with through holes (such as foam copper), or a winding metal wire structure (such as copper wire or steel wire), but the present invention is not limited thereto.
藉由前述結構配置，一方面通孔性葉片123本身即為良好的導熱材料用以傳導由螢光粉層122傳遞至基板121的熱量，另一方面是當基板121被馬達驅動後，通孔性葉片123的局部區域即具有渦流產生功能。進一步來說，除了通孔性葉片123的整體幾何形狀的擾流機制，通孔性葉片123的通孔還可再引導出微型渦流效應（旋轉時伴隨著高速氣流通過通孔），這種微型渦流可進一步地加速提升投影裝置整體內部腔體氣擾流作用。並且，通孔性葉片123的尺寸與重量從而可大幅降低，使得驅動單元130的負載功率可獲得減緩。須說明的是，通孔性葉片123的整體幾何形狀可以經由裁切、排列或拼湊等方式形成葉片形狀或不為葉片形狀，例如複數條狀的散射形排列方式。Through the above-mentioned structural configuration, on the one hand, the through-hole blade 123 itself is a good heat-conducting material for conducting the heat transferred from the fluorescent powder layer 122 to the substrate 121, and on the other hand, when the substrate 121 is driven by the motor, the local area of the through-hole blade 123 has the function of generating vortex. Further, in addition to the turbulence mechanism of the overall geometric shape of the through-hole blade 123, the through hole of the through-hole blade 123 can also induce a micro-vortex effect (accompanied by high-speed airflow passing through the through hole during rotation), and this micro-vortex can further accelerate and enhance the turbulence effect of the entire internal cavity of the projection device. In addition, the size and weight of the through-hole blade 123 can be greatly reduced, so that the load power of the drive unit 130 can be reduced. It should be noted that the overall geometric shape of the through-hole blade 123 can be formed into a blade shape or not into a blade shape by cutting, arranging or splicing, for example, a plurality of strips are arranged in a scattered shape.
於一些實施方式中，反射式不透光的基板121包含金屬材料。金屬材料例如包含Al、Ag、Cu、Fe、Mo或任意組合之合金，但本發明並不以此為限。In some embodiments, the reflective opaque substrate 121 includes a metal material, such as Al, Ag, Cu, Fe, Mo, or any combination of alloys, but the present invention is not limited thereto.
於一些實施方式中，反射式不透光的基板121包含陶瓷材料。陶瓷材料例如包含AIN、BN、SiC、Al2 O3 等系列材料，但本發明並不以此為限。In some implementations, the reflective opaque substrate 121 includes a ceramic material, such as AlN, BN, SiC, Al 2 O 3 , etc., but the present invention is not limited thereto.
於一些實施方式中，反射式不透光的基板121包含半導體材料。半導體材料例如包含單元半導體材料（例如，Si、Ge）、雙元半導體材料（例如，GaAs、InP、GaN、InAs、ZnSe、ZnS、InSe等）或其他雙元以上之多元化合物半導體等系列材料，但本發明並不以此為限。In some embodiments, the reflective opaque substrate 121 includes semiconductor materials. The semiconductor materials include, for example, single-element semiconductor materials (e.g., Si, Ge), binary semiconductor materials (e.g., GaAs, InP, GaN, InAs, ZnSe, ZnS, InSe, etc.), or other binary or more multi-element compound semiconductor materials, but the present invention is not limited thereto.
於一些實施方式中，穿透式透光的基板121的材料包含玻璃、石英、藍寶石或CaF2 ，但本發明並不以此為限。In some implementations, the material of the translucent substrate 121 includes glass, quartz, sapphire or CaF 2 , but the present invention is not limited thereto.
於一些實施方式中，通孔性葉片123的厚度為約0.5 mm至約50 mm，但本發明並不以此為限。In some embodiments, the thickness of the through-hole blade 123 is about 0.5 mm to about 50 mm, but the present invention is not limited thereto.
於一些實施方式中，螢光粉層122的材料包含鋁酸鹽(YAG)、矽酸鹽、氮化物或量子點，但本發明並不以此為限。In some implementations, the material of the fluorescent powder layer 122 includes YAG, silicate, nitride or quantum dots, but the present invention is not limited thereto.
於一些實施方式中，螢光粉層122使用之黏結劑的材料可以是有機材料或無機材料，其中有機材料例如是矽膠、環氧樹酯…等，而無機材料例如是氧化鋁、氮化鋁…等，但本發明並不以此為限。In some implementations, the binder material used in the fluorescent powder layer 122 can be an organic material or an inorganic material, wherein the organic material is, for example, silicone, epoxy resin, etc., and the inorganic material is, for example, aluminum oxide, aluminum nitride, etc., but the present invention is not limited thereto.
於一些實施方式中，通孔性葉片123係以機構方式（例如，利用螺絲鎖附或結構卡合）與基板121相互固定。於一些實施方式中，通孔性葉片123係經由黏膠材料（例如，散熱膏）與基板121相互固定。In some embodiments, the through-hole blade 123 is fixed to the substrate 121 by a mechanism (e.g., screw locking or structural engagement). In some embodiments, the through-hole blade 123 is fixed to the substrate 121 by an adhesive material (e.g., heat sink paste).
請參照第4圖至第6圖。第4圖為繪示一種習知之波長轉換元件900的底視圖。第5圖為繪示本發明之波長轉換元件120與習知之波長轉換元件900的光源功率-光斑溫度曲線圖。第6圖為繪示本發明之波長轉換元件120與習知之波長轉換元件900的光源功率-發光效率曲線圖。如第4圖所示，習知之波長轉換元件900的基板具有複數個箭形破孔。在第5圖與第6圖中，本發明為了與此習知之波長轉換元件900比較而採用的波長轉換元件120，其通孔性葉片123具有約95 ppi之孔隙密度以及約2 mm之厚度。並且，第5圖與第6圖中的曲線係本發明波長轉換元與習知之波長轉換元件900採用5000 rpm的相同轉速而測得的。Please refer to Figures 4 to 6. Figure 4 is a bottom view of a known wavelength conversion element 900. Figure 5 is a light source power-spot temperature curve diagram of the wavelength conversion element 120 of the present invention and the known wavelength conversion element 900. Figure 6 is a light source power-luminous efficiency curve diagram of the wavelength conversion element 120 of the present invention and the known wavelength conversion element 900. As shown in Figure 4, the substrate of the known wavelength conversion element 900 has a plurality of arrow-shaped holes. In Figures 5 and 6, the wavelength conversion element 120 used in the present invention for comparison with the known wavelength conversion element 900 has a through-hole blade 123 with a pore density of about 95 ppi and a thickness of about 2 mm. Furthermore, the curves in FIG. 5 and FIG. 6 are measured when the wavelength conversion element of the present invention and the conventional wavelength conversion element 900 adopt the same rotation speed of 5000 rpm.
由第5圖可以清楚看出，本發明的波長轉換元件120的光斑處所測得的溫度相較於習知之波長轉換元件900的光斑處的溫度至少下降50°C。因此可以有效避免螢光粉層122因高溫而產生熱衰現象。另外，由第6圖可以清楚看出，對於本發明的波長轉換元件120來說，螢光粉層122的發光效率隨著光源功率的增加並沒有劇烈的惡化（亦即，無熱衰現象）。因此，對於採用本發明的波長轉換元件120的投影裝置來說，其光源140的最高操作功率即可有效提升。As can be clearly seen from FIG. 5, the temperature measured at the light spot of the wavelength conversion element 120 of the present invention is at least 50°C lower than the temperature at the light spot of the conventional wavelength conversion element 900. Therefore, the thermal decay phenomenon of the phosphor layer 122 due to high temperature can be effectively avoided. In addition, as can be clearly seen from FIG. 6, for the wavelength conversion element 120 of the present invention, the luminous efficiency of the phosphor layer 122 does not deteriorate dramatically as the light source power increases (that is, there is no thermal decay phenomenon). Therefore, for the projection device using the wavelength conversion element 120 of the present invention, the maximum operating power of its light source 140 can be effectively improved.
如第3圖所示，螢光粉層122與通孔性葉片123分別位於基板121的相反兩側，較佳地螢光粉層122與通孔性葉片123分別投影至基板121的正投影係至少部分重疊，但本發明並不以此為限。As shown in FIG. 3 , the fluorescent powder layer 122 and the through-hole blade 123 are respectively located on opposite sides of the substrate 121 . Preferably, the orthographic projections of the fluorescent powder layer 122 and the through-hole blade 123 respectively projected onto the substrate 121 are at least partially overlapped, but the present invention is not limited thereto.
請參照第7圖，其為繪示根據本發明另一實施方式之波長轉換元件120A的剖面圖。於本實施方式中，螢光粉層122與通孔性葉片123a位於基板121的同一側。通孔性葉片123a同樣可以在波長轉換元件120A轉動時，利用高速氣流通過通孔而引導出微型渦流效應。Please refer to FIG. 7, which is a cross-sectional view of a wavelength conversion element 120A according to another embodiment of the present invention. In this embodiment, the phosphor layer 122 and the through-hole blade 123a are located on the same side of the substrate 121. The through-hole blade 123a can also induce a micro-eddy effect by using high-speed airflow passing through the through hole when the wavelength conversion element 120A rotates.
請參照第8圖，其為繪示根據本發明另一實施方式之波長轉換元件120B的剖面圖。於本實施方式中，波長轉換元件120B包含兩個通孔性葉片123b1、123b2。通孔性葉片123b1、123b2分別位於基板121的相反兩側，其中通孔性葉片123b1與螢光粉層122位於基板121的同一側，而通孔性葉片123b2位於基板121的另一側。通孔性葉片123b1、123b2可以在波長轉換元件120B轉動時，利用高速氣流通過通孔而分別在基板121的相反兩側引導出微型渦流效應。Please refer to FIG. 8, which is a cross-sectional view of a wavelength conversion element 120B according to another embodiment of the present invention. In this embodiment, the wavelength conversion element 120B includes two through-hole blades 123b1 and 123b2. The through-hole blades 123b1 and 123b2 are respectively located on opposite sides of the substrate 121, wherein the through-hole blades 123b1 and the fluorescent powder layer 122 are located on the same side of the substrate 121, and the through-hole blades 123b2 are located on the other side of the substrate 121. When the wavelength conversion element 120B rotates, the through-hole blades 123b1 and 123b2 can use high-speed airflow to pass through the through holes to induce micro-eddy effects on opposite sides of the substrate 121.
請參照第9圖，其為繪示根據本發明另一實施方式之波長轉換元件220的剖面圖。於本實施方式中，波長轉換元件220包含基板121、螢光粉層122以及非通孔性葉片223，其中基板121與螢光粉層122係相同或相似於第3圖所示的實施方式，因此可參照前文相關敘述，在此恕不贅述。具體來說，本實施方式之波長轉換元件220係以非通孔性葉片223替換第3圖所示之通孔性葉片123。非通孔性葉片223具有介於5 µm至1.25 mm之粗糙度，或者非通孔性葉片223的比表面積大於非通孔性葉片223的幾何面積的10%以上。前述比表面積是指非通孔性葉片223的單位質量所具有的總表面積。比表面積的測量可採用低溫氮氣吸附法或者靜態容量法（static volumetric principle-V-Sorb 2800），但本發明並不以此為限。前述幾何面積是指非通孔性葉片223不考慮粗糙度的總面積。幾何面積可由非通孔性葉片223的各表面的正投影面積進行加總而獲得。Please refer to FIG. 9, which is a cross-sectional view of a wavelength conversion element 220 according to another embodiment of the present invention. In this embodiment, the wavelength conversion element 220 includes a substrate 121, a phosphor layer 122, and a non-through-hole blade 223, wherein the substrate 121 and the phosphor layer 122 are the same or similar to the embodiment shown in FIG. 3, and therefore, the relevant descriptions above can be referred to, and will not be repeated here. Specifically, the wavelength conversion element 220 of this embodiment replaces the through-hole blade 123 shown in FIG. 3 with a non-through-hole blade 223. The non-through-hole blade 223 has a roughness between 5 μm and 1.25 mm, or the specific surface area of the non-through-hole blade 223 is greater than 10% of the geometric area of the non-through-hole blade 223. The aforementioned specific surface area refers to the total surface area per unit mass of the non-porous blade 223. The specific surface area can be measured by low-temperature nitrogen adsorption method or static volumetric principle (V-Sorb 2800), but the present invention is not limited thereto. The aforementioned geometric area refers to the total area of the non-porous blade 223 without considering the roughness. The geometric area can be obtained by summing up the orthographic projection areas of each surface of the non-porous blade 223.
藉由前述結構配置，非通孔性葉片223的局部區域亦可具有渦流產生功能。除了非通孔性葉片223的整體幾何形狀的擾流機制，非通孔性葉片223的粗糙表面還可再引導出微型渦流效應（藉由高速氣流撞擊粗糙表面），進而可加速提升投影裝置整體內部腔體氣擾流作用。By means of the above-mentioned structural configuration, a local area of the non-porous blade 223 can also have a vortex generation function. In addition to the turbulence mechanism of the overall geometric shape of the non-porous blade 223, the rough surface of the non-porous blade 223 can also induce a micro-vortex effect (by high-speed airflow hitting the rough surface), thereby accelerating and enhancing the turbulence effect of the entire internal cavity of the projection device.
非通孔性葉片223的葉片形狀、材料及其相對於基板121的設置位置，可相同於相似於第2圖、第3圖、第7圖與第8圖中所示的通孔性葉片123、123a、123b1、123b2的任一者，在此恕不贅述。The blade shape, material and location of the non-through-hole blade 223 relative to the substrate 121 may be the same as any of the through-hole blades 123, 123a, 123b1, 123b2 shown in FIGS. 2, 3, 7 and 8, and will not be elaborated herein.
由以上對於本發明之具體實施方式之詳述，可以明顯地看出，於本發明的波長轉換元件中，設置於基板上的葉片的局部區域具有渦流產生功能。除了整體葉片幾何形狀的擾流機制，葉片材料或機構設計可再引導微型渦流效應，加速提升投影裝置整體內部腔體氣擾流作用，因此葉片尺寸與重量能大幅降低，減緩驅動單元的負載功率。葉片可為通孔性葉片，其可在高速氣流通過通孔後產生渦流產生效應；葉片也可為高粗糙度或高比表面積的非通孔性葉片，其可在高速氣流撞擊表面結構後產生渦流產生效應。From the above detailed description of the specific implementation of the present invention, it can be clearly seen that in the wavelength conversion element of the present invention, the local area of the blade disposed on the substrate has a vortex generation function. In addition to the turbulence mechanism of the overall blade geometry, the blade material or mechanism design can further guide the micro-vortex effect to accelerate the overall internal cavity air turbulence effect of the projection device, so that the blade size and weight can be greatly reduced, reducing the load power of the drive unit. The blade can be a through-hole blade, which can generate a vortex generation effect after the high-speed airflow passes through the through hole; the blade can also be a non-through-hole blade with high roughness or high specific surface area, which can generate a vortex generation effect after the high-speed airflow hits the surface structure.
雖然本發明已以實施方式揭露如上，然其並不用以限定本發明，任何熟習此技藝者，在不脫離本發明的精神和範圍內，當可作各種的更動與潤飾，因此本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.
110:殼體 120,120A,120B,220,900:波長轉換元件 121:基板 121a:軸孔 122:螢光粉層 123,123a,123b1,123b2:通孔性葉片 130:驅動單元 131:轉軸 140:光源 223:非通孔性葉片 A:軸線110: housing 120,120A,120B,220,900: wavelength conversion element 121: substrate 121a: axial hole 122: fluorescent powder layer 123,123a,123b1,123b2: through-hole blade 130: drive unit 131: rotating shaft 140: light source 223: non-through-hole blade A: axis
為讓本發明之上述和其他目的、特徵、優點與實施例能更明顯易懂，所附圖式之說明如下： 第1圖為繪示應用於投影裝置內之光源模組的立體圖。 第2圖為繪示第1圖中之波長轉換元件的底視圖。 第3圖為繪示第1圖中之波長轉換元件沿著線段3-3的剖面圖。 第4圖為繪示一種習知之波長轉換元件的底視圖。 第5圖為繪示本發明之波長轉換元件與習知之波長轉換元件的光源功率-光斑溫度曲線圖。 第6圖為繪示本發明之波長轉換元件與習知之波長轉換元件的光源功率-發光效率曲線圖。 第7圖為繪示根據本發明另一實施方式之波長轉換元件的剖面圖。 第8圖為繪示根據本發明另一實施方式之波長轉換元件的剖面圖。 第9圖為繪示根據本發明另一實施方式之波長轉換元件的剖面圖。In order to make the above and other purposes, features, advantages and embodiments of the present invention more clearly understandable, the attached drawings are described as follows: Figure 1 is a three-dimensional diagram of a light source module used in a projection device. Figure 2 is a bottom view of the wavelength conversion element in Figure 1. Figure 3 is a cross-sectional view of the wavelength conversion element in Figure 1 along line segment 3-3. Figure 4 is a bottom view of a known wavelength conversion element. Figure 5 is a light source power-spot temperature curve of the wavelength conversion element of the present invention and the known wavelength conversion element. Figure 6 is a light source power-luminous efficiency curve of the wavelength conversion element of the present invention and the known wavelength conversion element. Figure 7 is a cross-sectional view of a wavelength conversion element according to another embodiment of the present invention. FIG. 8 is a cross-sectional view of a wavelength conversion element according to another embodiment of the present invention. FIG. 9 is a cross-sectional view of a wavelength conversion element according to another embodiment of the present invention.
國內寄存資訊(請依寄存機構、日期、號碼順序註記) 無 國外寄存資訊(請依寄存國家、機構、日期、號碼順序註記) 無Domestic storage information (please note in the order of storage institution, date, and number) None Foreign storage information (please note in the order of storage country, institution, date, and number) None
120:波長轉換元件120: Wavelength conversion element
121:基板121: Substrate
122:螢光粉層122: Fluorescent powder layer
123:通孔性葉片123: Through-hole blade
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614926A (en) * | 2014-10-28 | 2015-05-13 | 扬州吉新光电有限公司 | Wavelength conversion device with a cooling structure baseplate and light emitting device |
| TW201638053A (en) * | 2015-02-03 | 2016-11-01 | 日本電氣硝子股份有限公司 | Wavelength conversion member and light emitting device using same |
| TW201906195A (en) * | 2017-06-14 | 2019-02-01 | 日商日本電氣硝子股份有限公司 | Wavelength conversion member and light emitting device |
| US20190094671A1 (en) * | 2017-09-25 | 2019-03-28 | Panasonic intellectual property Management co., Ltd | Phosphor wheel, phosphor wheel device including the same, light conversion device, and projection display apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614926A (en) * | 2014-10-28 | 2015-05-13 | 扬州吉新光电有限公司 | Wavelength conversion device with a cooling structure baseplate and light emitting device |
| TW201638053A (en) * | 2015-02-03 | 2016-11-01 | 日本電氣硝子股份有限公司 | Wavelength conversion member and light emitting device using same |
| TW201906195A (en) * | 2017-06-14 | 2019-02-01 | 日商日本電氣硝子股份有限公司 | Wavelength conversion member and light emitting device |
| US20190094671A1 (en) * | 2017-09-25 | 2019-03-28 | Panasonic intellectual property Management co., Ltd | Phosphor wheel, phosphor wheel device including the same, light conversion device, and projection display apparatus |
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