TWI591415B - Optical module - Google Patents
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Description
本發明是有關於一種投影機，且特別是有關於一種用於投影機的光機模組。 The present invention relates to a projector, and more particularly to a optomechanical module for a projector.
由於數位光處理(Digital light Processing,DLP)投影機具有高亮度、高對比、色彩逼真、反應速度快等優點，近年來已成為投影機的主流產品。 Digital Light Processing (DLP) projectors have become the mainstream products of projectors in recent years due to their high brightness, high contrast, vivid color and fast response.
一般而言，光機模組搭配色輪模組一起使用，使光線通過色輪的不同色區時能被轉換成有色光線，例如紅光、綠光以及藍光等，再以數位化微鏡元件(Digital Micromirror Device,DMD)將有色光線投影至螢幕，形成一影像。然而，光會產生熱能，越多光線入射至光機模組內部表示越多的熱能進入光機模組中，恐造成光機模組的溫度過高。 In general, the optomechanical module is used together with the color wheel module to convert light into colored light, such as red, green, and blue light, through different color zones of the color wheel, and then digitize the micromirror component. (Digital Micromirror Device, DMD) Projects colored light onto the screen to form an image. However, light generates heat energy. The more light is incident on the inside of the light module, the more heat energy enters the light machine module, which may cause the temperature of the light machine module to be too high.
本發明係有關於一種光機模組，根據光學實驗模擬可讓有效光束通過的最佳化開口尺寸來設計擋光板，以減少無用光線入射至光機模組內部。 The invention relates to a optomechanical module, which designs a light barrier according to an optical experiment to simulate an optimized opening size through which an effective beam passes, so as to reduce unnecessary light from entering the interior of the optomechanical module.
根據本發明之一方面，提出一種光機模組，包括一 光機殼體、一第一擋光板、一光導管以及一第二擋光板。第一擋光板設置於光機殼體上，第一擋光板設有一可讓光束通過之一第一平面開口。光導管具有一朝向第一平面開口的開口端。第二擋光板設置於開口端上，第二擋光板設有一可讓光束進入光導管之一第二平面開口。第一平面開口具有一第一縱向尺寸以及一第一橫向尺寸，且第一縱向尺寸小於第一橫向尺寸。 According to an aspect of the present invention, a optomechanical module is provided, including a a light machine housing, a first light blocking plate, a light pipe, and a second light blocking plate. The first light blocking plate is disposed on the optical machine casing, and the first light blocking plate is provided with a first planar opening for allowing the light beam to pass through. The light pipe has an open end that opens toward the first plane. The second light blocking plate is disposed on the open end, and the second light blocking plate is provided with a second planar opening for allowing the light beam to enter the light pipe. The first planar opening has a first longitudinal dimension and a first lateral dimension, and the first longitudinal dimension is less than the first lateral dimension.
根據本發明之一方面，提出一種光機模組，包括一光機殼體、一第一擋光板以及一光導管。第一擋光板設置於光機殼體上，第一擋光板設有一可讓光束通過之一第一平面開口。光導管具有一朝向第一平面開口的開口端。第一平面開口具有一第一縱向尺寸以及一第一橫向尺寸，且第一縱向尺寸小於第一橫向尺寸，第一平面開口係由一圓弧形開口及位於圓弧形開口之一側的一遮蔽部分所形成。 According to an aspect of the invention, a optomechanical module is provided, comprising a optomechanical housing, a first light barrier and a light guide. The first light blocking plate is disposed on the optical machine casing, and the first light blocking plate is provided with a first planar opening for allowing the light beam to pass through. The light pipe has an open end that opens toward the first plane. The first planar opening has a first longitudinal dimension and a first lateral dimension, and the first longitudinal dimension is smaller than the first lateral dimension, and the first planar opening is formed by a circular arc opening and one side of the circular arc shaped opening The shadow portion is formed.
根據本發明之一方面，提出一種光機模組，包括：一光機殼體、一光導管以及一第一擋光板。光導管具有一開口端。第一擋光板設置於開口端上，第一擋光板設有一可讓光束進入光導管之一第一平面開口，第一擋光板為高反射性之金屬材質，並以扣件夾持光導管。 According to an aspect of the invention, a optomechanical module is provided, comprising: a optomechanical housing, a light guide, and a first light barrier. The light pipe has an open end. The first light blocking plate is disposed on the open end, and the first light blocking plate is provided with a first planar opening for allowing the light beam to enter the light guiding tube. The first light blocking plate is made of a highly reflective metal material, and the light guide is clamped by the fastener.
為了對本發明之上述及其他方面有更佳的瞭解，下文特舉較佳實施例，並配合所附圖式，作詳細說明如下： In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:
100‧‧‧光機模組 100‧‧‧ optomechanical module
110‧‧‧光機殼體 110‧‧‧Light machine housing
120‧‧‧第一擋光板 120‧‧‧First light barrier
122‧‧‧第一平面開口 122‧‧‧ first plane opening
123‧‧‧圓弧形開口 123‧‧‧Circular opening
124‧‧‧遮蔽部分 124‧‧‧shaded part
130‧‧‧第二擋光板 130‧‧‧second light barrier
131‧‧‧扣件 131‧‧‧fasteners
132‧‧‧第二平面開口 132‧‧‧Second plane opening
140‧‧‧光導管 140‧‧‧Light pipes
142‧‧‧開口端 142‧‧‧Open end
A‧‧‧第一縱向尺寸 A‧‧‧ first longitudinal size
B‧‧‧第一橫向尺寸 B‧‧‧First horizontal dimension
C‧‧‧第二縱向尺寸 C‧‧‧second longitudinal size
D‧‧‧第二橫向尺寸 D‧‧‧Second horizontal size
L‧‧‧光束 L‧‧‧beam
Ax‧‧‧光軸 Ax‧‧‧ optical axis
d‧‧‧距離 D‧‧‧distance
P‧‧‧光錐 P‧‧‧ light cone
α‧‧‧第一錐角 ‧‧‧‧first cone angle
β‧‧‧第二錐角 Β‧‧‧second cone angle
O1、O2‧‧‧中心 O1, O2‧‧ Center
第1圖繪示依照本發明一實施例之光機模組的側面示意圖 1 is a side view of a optomechanical module according to an embodiment of the invention.
第2圖繪示依照本發明一實施例之光機模組之局部立體示意圖。 FIG. 2 is a partial perspective view of a optomechanical module according to an embodiment of the invention.
第3圖繪示光導管、第一擋光板與第二擋光板的配置示意圖。 FIG. 3 is a schematic view showing the arrangement of the light guide, the first light blocking plate and the second light blocking plate.
第4圖繪示有效光束形成光錐的示意圖。 Figure 4 is a schematic diagram showing the effective beam forming a light cone.
第5A至5C圖繪示依照不同實施態樣之第一平面開口的示意圖。 5A-5C are schematic views of a first planar opening in accordance with various embodiments.
以下係提出實施例進行詳細說明，實施例僅用以作為範例說明，並非用以限縮本發明欲保護之範圍。 The embodiments are described in detail below, and the embodiments are only intended to be illustrative and not intended to limit the scope of the invention.
請參照第1及2圖，其中第1圖繪示依照本發明一實施例之光機模組100的側面示意圖，第2圖繪示依照本發明一實施例之光機模組100之局部立體示意圖。在第1圖中，光機模組100包括一光機殼體110、一第一擋光板120、一第二擋光板130以及一光導管140(參見第2圖)。第一擋光板120設置於光機殼體110上，且第一擋光板120設有一可讓光束L通過之一第一平面開口122。從第1圖的視角來看，第一擋光板120大致上位於X-Y平面上，而第一平面開口122為位於X-Y平面上的開口。在一實施例中，第一平面開口122具有一第一縱向尺寸A以及一第一橫向尺寸B。第一縱向尺寸A指第一平面開口122位於X軸向上或位於一相對於X軸向傾斜微小角度的方位上的尺寸，而第一橫向尺寸B指第一平面開口122位於Y軸向上或位於一相對於Y軸向傾斜微小角度的方位上的尺寸。 1 and 2, wherein FIG. 1 is a side view of a optomechanical module 100 according to an embodiment of the invention, and FIG. 2 is a partial perspective view of a optomechanical module 100 according to an embodiment of the invention. schematic diagram. In FIG. 1 , the optomechanical module 100 includes a optomechanical housing 110 , a first light barrier 120 , a second light barrier 130 , and a light guide 140 (see FIG. 2 ). The first light blocking plate 120 is disposed on the optical housing 110, and the first light blocking plate 120 is provided with a first planar opening 122 for allowing the light beam L to pass through. From the perspective of FIG. 1, the first light barrier 120 is substantially in the X-Y plane, and the first planar opening 122 is an opening on the X-Y plane. In an embodiment, the first planar opening 122 has a first longitudinal dimension A and a first lateral dimension B. The first longitudinal dimension A refers to a dimension in which the first planar opening 122 is located in the X-axis direction or in an azimuth obliquely inclined with respect to the X-axis, and the first lateral dimension B refers to the first planar opening 122 located in the Y-axis or at the A dimension in azimuth that is inclined by a slight angle with respect to the Y axis.
第一縱向尺寸A與第一橫向尺寸B的大小不同。在一實施例中，第一縱向尺寸A例如小於第一橫向尺寸B，第一縱 向尺寸A與第一橫向尺寸B的大小與通過第一平面開口122入射至光機模組100內的光束L之光學特性有關，請一併參照第4圖之說明。 The first longitudinal dimension A is different from the first lateral dimension B. In an embodiment, the first longitudinal dimension A is, for example, smaller than the first lateral dimension B, the first longitudinal The magnitudes of the dimension A and the first lateral dimension B are related to the optical characteristics of the light beam L incident on the optical module 100 through the first planar opening 122. Please refer to FIG. 4 together.
此外，從第1圖的視角來看，還可看到光導管140具有一朝向第一平面開口122的開口端142(參見第2圖)以及設置於開口端142上的第二擋光板130。第二擋光板130設有一可讓上述光束L進入光導管140之第二平面開口132。 Furthermore, from the perspective of FIG. 1, it can also be seen that the light pipe 140 has an open end 142 (see FIG. 2) facing the first planar opening 122 and a second light barrier 130 disposed on the open end 142. The second light blocking plate 130 is provided with a second planar opening 132 for allowing the light beam L to enter the light pipe 140.
第二擋光板130設置於第一擋光板120的後面，與第一擋光板120平行相對。也就是說，在一實施例中，第二擋光板130大致上位於X-Y平面上，而第二平面開口132為位於X-Y平面上的開口。在一實施例中，第二平面開口132與第一平面開口122相對於水平面傾斜設置於第一擋光板120與第二擋光板130上，以使光束L經由傾斜設置的第一平面開口122與第二平面開口132以預定的傾斜角入射至光機模組100內部的光路中。 The second light blocking plate 130 is disposed behind the first light blocking plate 120 and is opposite to the first light blocking plate 120. That is, in one embodiment, the second light barrier 130 is substantially in the X-Y plane and the second planar opening 132 is an opening in the X-Y plane. In an embodiment, the second planar opening 132 and the first planar opening 122 are disposed on the first light blocking plate 120 and the second light blocking plate 130 obliquely with respect to the horizontal plane, so that the light beam L is disposed along the inclined first planar opening 122. The second planar opening 132 is incident into the optical path inside the optomechanical module 100 at a predetermined tilt angle.
請參照第1圖，第二平面開口132具有一第二縱向尺寸C以及一第二橫向尺寸D。第二縱向尺寸C以及第二橫向尺寸D的大小不同，在一實施例中，第二縱向尺寸C例如小於第二橫向尺寸D。以矩形開口為例，第二縱向尺寸C與第二橫向尺寸D之比可為9：16或其他數值。 Referring to FIG. 1, the second planar opening 132 has a second longitudinal dimension C and a second lateral dimension D. The second longitudinal dimension C and the second lateral dimension D are different in size, and in one embodiment, the second longitudinal dimension C is, for example, smaller than the second lateral dimension D. Taking a rectangular opening as an example, the ratio of the second longitudinal dimension C to the second lateral dimension D may be 9:16 or other values.
很明顯地，第一縱向尺寸A與第一橫向尺寸B之比可以等於第二縱向尺寸C與第二橫向尺寸D之比。也就是說，當第二縱向尺寸C與第二橫向尺寸D之比為9：16時，第一縱向尺寸A與第一橫向尺寸B之比可為9：16或接近9：16。 It will be apparent that the ratio of the first longitudinal dimension A to the first lateral dimension B may be equal to the ratio of the second longitudinal dimension C to the second lateral dimension D. That is, when the ratio of the second longitudinal dimension C to the second lateral dimension D is 9:16, the ratio of the first longitudinal dimension A to the first lateral dimension B may be 9:16 or close to 9:16.
請參照第2圖及第3圖，其中第3圖繪示光導管 140、第一擋光板120與第二擋光板130的配置示意圖。在第3圖中，第二擋光板130以扣件131(例如是彈片或夾具)夾持光導管140，並由光導管140之開口端142向外延伸，用以阻擋無用光線。第二擋光板130較佳為高反射性之金屬材質(例如鋁板或不鏽鋼)，但非限定，其他高反射性且耐高溫之材質亦可採用，以減少熱集中在第二擋光板130上。從第2圖之視角來看，第一擋光板120與第二擋光板130相對且相隔一距離d，且距離d位於垂直X-Y平面的Z軸方向上。此距離d與入射光束L的光學特性有關，當入射光束L形成的光錐P的錐角越大時，距離d越短；反之，當入射光束L形成的光錐P的錐角越小時，距離d越長。 Please refer to Figure 2 and Figure 3, where Figure 3 shows the light pipe 140. Schematic diagram of the arrangement of the first light blocking plate 120 and the second light blocking plate 130. In FIG. 3, the second light barrier 130 holds the light guide 140 with a fastener 131 (for example, a spring or a clamp) and extends outward from the open end 142 of the light guide 140 to block unwanted light. The second light blocking plate 130 is preferably a highly reflective metal material (for example, aluminum plate or stainless steel), but is not limited, and other materials having high reflectivity and high temperature resistance may be used to reduce heat concentration on the second light blocking plate 130. From the perspective of FIG. 2, the first light blocking plate 120 is opposite to the second light blocking plate 130 by a distance d, and the distance d is located in the Z-axis direction of the vertical X-Y plane. This distance d is related to the optical characteristic of the incident light beam L. When the cone angle of the light cone P formed by the incident light beam L is larger, the distance d is shorter; conversely, when the cone angle of the light cone P formed by the incident light beam L is smaller, The longer the distance d is.
在第2圖中，光機殼體110設有一凹槽112，且光導管140設置於凹槽112內。當光束L從第一平面開口122入射並聚焦於第二平面開口132上時，部分光束L被第一擋光板120阻擋而未進入到凹槽112內，接著，進入到凹槽112內的光束L仍有一部分被第二擋光板130阻擋而未進入到光導管140中。因此，僅有第2圖中形成光錐P的有效光束L才能從第一平面開口122入射並聚焦於第二平面開口132上，以避免無用光線入射至光機模組100內部而造成光機模組100的溫度過高。 In FIG. 2, the optomechanical housing 110 is provided with a recess 112, and the light guide 140 is disposed in the recess 112. When the light beam L is incident from the first planar opening 122 and focused on the second planar opening 132, the partial light beam L is blocked by the first light barrier 120 without entering the recess 112, and then, the light beam entering the recess 112 A part of L is still blocked by the second light blocking plate 130 and does not enter the light guide 140. Therefore, only the effective light beam L forming the light cone P in FIG. 2 can be incident from the first planar opening 122 and focused on the second planar opening 132 to prevent unwanted light from entering the interior of the light module 100 and causing the light machine to be caused. The temperature of the module 100 is too high.
當有效光束L經過光導管140進入光機模組100內時，有效光束L再經過數位化微鏡元件(圖未繪示)及鏡頭(圖未繪示)後投影至螢幕，以將影像呈現於螢幕上。 When the effective light beam L enters the light module 100 through the light pipe 140, the effective light beam L is then projected onto the screen through a digital micromirror component (not shown) and a lens (not shown) to present the image. On the screen.
請參照第4圖，其繪示有效光束L形成光錐P的示意圖。光錐P於第一縱向尺寸A的方向(X軸向)上具有一第一錐角α，光錐P於第一橫向尺寸B的方向(Y軸向)上具有一第 二錐角β。在一實施例中，第一錐角α例如小於第二錐角β。 Please refer to FIG. 4, which shows a schematic diagram of the effective light beam L forming the light cone P. The light cone P has a first cone angle α in the direction of the first longitudinal dimension A (X-axis direction), and the light cone P has a first direction in the direction of the first lateral dimension B (Y-axis direction) Two cone angles β. In an embodiment, the first cone angle α is, for example, smaller than the second cone angle β.
本發明可根據光學實驗模擬可讓有效光束L通過的最佳化開口尺寸來設計第一擋光板120，以減少無用光線入射至光機模組100內部。也就是說，在有效光束L的錐角和第一擋光板120與第二擋光板130之間的距離d為已知的情況下，計算第一擋光板120的第一縱向尺寸A與第一橫向尺寸B，以得到最佳化的開口尺寸。在一實施例中，根據三角餘弦定理，第一縱向尺寸A由光錐P於第一縱向尺寸A的方向上的第一錐角α及距離d決定。此外，第一橫向尺寸B由光錐P於第一橫向尺寸B的方向上的第二錐角β及距離d決定。 The present invention can design the first light barrier 120 according to an optical experiment to simulate an optimized aperture size through which the effective beam L can pass, to reduce the incidence of unwanted light entering the interior of the optomechanical module 100. That is, in the case where the taper angle of the effective light beam L and the distance d between the first light barrier 120 and the second light barrier 130 are known, the first longitudinal dimension A of the first light barrier 120 is calculated and the first The transverse dimension B is used to obtain an optimized opening size. In an embodiment, according to the triangular cosine theorem, the first longitudinal dimension A is determined by the first cone angle α and the distance d of the light cone P in the direction of the first longitudinal dimension A. Further, the first lateral dimension B is determined by the second cone angle β and the distance d of the light cone P in the direction of the first lateral dimension B.
第一擋光板120與第二擋光板130可為高反射性之金屬材質，例如不鏽鋼材或鋁板。相對於以鑄鐵或擠壓成形的金屬材質製成的光機殼體110，第一擋光板120與第二擋光板130可經過高平面化拋光處理來增加光反射性，以增加擋光功效。 The first light blocking plate 120 and the second light blocking plate 130 may be made of a highly reflective metal material such as a stainless steel material or an aluminum plate. The first light barrier 120 and the second light barrier 130 may be subjected to a high planarization polishing process to increase light reflectivity to increase light blocking efficiency, relative to the optical housing 110 made of cast iron or extruded metal material.
請參照第5A至5C圖，其繪示依照不同實施態樣之第一平面開口122的示意圖。在第5A圖中，第一平面開口122係由一圓弧形開口123及位於圓弧形開口123兩側之二遮蔽部分124(例如是半月形)所形成，且此二遮蔽部分124分別位於第一平面開口122之上側及下側，用以阻擋由第一平面開口122的上方及下方入射的無用光線。 Please refer to FIGS. 5A-5C for a schematic diagram of a first planar opening 122 in accordance with various embodiments. In FIG. 5A, the first planar opening 122 is formed by a circular arc opening 123 and two shielding portions 124 (for example, a half moon shape) on both sides of the circular arc opening 123, and the two shielding portions 124 are respectively located. The upper side and the lower side of the first planar opening 122 are for blocking unnecessary light incident from above and below the first planar opening 122.
在第5B及5C圖中，第一平面開口122係由一圓弧形開口123及位於圓弧形開口123之一側之一遮蔽部分124(例如是半月形)所形成，且此遮蔽部分124對應遮蔽第一平面開口122之上側或下側，用以阻擋由第一平面開口122的上方或下方 入射的無用光線。 In FIGS. 5B and 5C, the first planar opening 122 is formed by a circular arc opening 123 and a shielding portion 124 (for example, a half moon shape) on one side of the circular arc opening 123, and the shielding portion 124 Corresponding to shielding the upper side or the lower side of the first planar opening 122 for blocking above or below the first planar opening 122 Incident light that is incident.
在第5A圖中，第一平面開口122的第一縱向尺寸A小於第5B及5C圖中第一平面開口122的第一縱向尺寸A’，進而增加無用光線被阻擋的面積。因此，本發明可根據實際的需求來調整第一平面開口122的縱向尺寸，以得到最佳化的開口尺寸。 In Fig. 5A, the first longitudinal dimension A of the first planar opening 122 is smaller than the first longitudinal dimension A' of the first planar opening 122 in the 5B and 5C views, thereby increasing the area where unwanted light is blocked. Therefore, the present invention can adjust the longitudinal dimension of the first planar opening 122 according to actual needs to obtain an optimized opening size.
在一實施例中，當第一平面開口122與第二平面開口132平行相對時，圓弧形開口123之中心O1對齊第二平面開口132之中心O2，且圓弧形開口123之中心O1與第二平面開口132之中心O2例如位於光束L之光軸Ax(參見第3圖之Z軸方向)上，以使光束L垂直地入射至光導管140中。但是，在另一實施例中，圓弧形開口123之中心O1可以不對齊第二平面開口132之中心O2，且圓弧形開口123之中心O1與第二平面開口132之中心O2亦可不位於光束L之光軸Ax上。 In an embodiment, when the first planar opening 122 and the second planar opening 132 are parallel to each other, the center O1 of the circular arc-shaped opening 123 is aligned with the center O2 of the second planar opening 132, and the center O1 of the circular arc-shaped opening 123 is The center O2 of the second planar opening 132 is, for example, located on the optical axis Ax of the light beam L (see the Z-axis direction of Fig. 3) so that the light beam L is incident perpendicularly into the light guide 140. However, in another embodiment, the center O1 of the circular arc-shaped opening 123 may not be aligned with the center O2 of the second planar opening 132, and the center O1 of the circular arc-shaped opening 123 and the center O2 of the second planar opening 132 may not be located. The optical axis Ax of the light beam L.
本發明上述實施例所揭露之光機模組，係根據入射光束的光學特性進行實驗，並模擬可讓有效光束通過的最佳化開口尺寸來設計擋光板，以減少無用光線入射至光機模組內部。也就是說，在有效光束的錐角和第一擋光板與第二擋光板之間的距離為已知的情況下，計算第一擋光板的第一縱向尺寸與第一橫向尺寸，以得到最佳化的開口尺寸。因此，入射至光機模組內部的有效光束可被控制在理想狀態下，再透過高反射性的第一擋光板與第二擋光板阻擋無用的光線，以降低進入光機模組內的熱能，進而解決習知光機模組的溫度過高的問題。 The optomechanical module disclosed in the above embodiments of the present invention performs experiments based on the optical characteristics of the incident beam, and simulates an optimized aperture size through which the effective beam passes to design a light barrier to reduce the incidence of unwanted light to the optical mode. Inside the group. That is, in the case where the taper angle of the effective beam and the distance between the first light barrier and the second light barrier are known, the first longitudinal dimension and the first lateral dimension of the first light barrier are calculated to obtain the most The opening size of Jiahua. Therefore, the effective beam incident on the interior of the optomechanical module can be controlled under ideal conditions, and then the first light barrier and the second damper are blocked by the highly reflective first light barrier to block unnecessary light to reduce the heat energy entering the optomechanical module. In turn, the problem of excessive temperature of the conventional optomechanical module is solved.
綜上所述，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。本發明所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾。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為準。 In summary, although the invention has been disclosed above in the preferred embodiments, It is not intended to limit the invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.
100‧‧‧光機模組 100‧‧‧ optomechanical module
110‧‧‧光機殼體 110‧‧‧Light machine housing
120‧‧‧第一擋光板 120‧‧‧First light barrier
122‧‧‧第一平面開口 122‧‧‧ first plane opening
130‧‧‧第二擋光板 130‧‧‧second light barrier
132‧‧‧第二平面開口 132‧‧‧Second plane opening
A‧‧‧第一縱向尺寸 A‧‧‧ first longitudinal size
B‧‧‧第一橫向尺寸 B‧‧‧First horizontal dimension
C‧‧‧第二縱向尺寸 C‧‧‧second longitudinal size
D‧‧‧第二橫向尺寸 D‧‧‧Second horizontal size
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| TW104130074A TWI591415B (en) | 2015-09-11 | 2015-09-11 | Optical module |
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