TWI676856B - Projection system - Google Patents

Projection system Download PDF

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TWI676856B
TWI676856B TW107134153A TW107134153A TWI676856B TW I676856 B TWI676856 B TW I676856B TW 107134153 A TW107134153 A TW 107134153A TW 107134153 A TW107134153 A TW 107134153A TW I676856 B TWI676856 B TW I676856B
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light
opening
projection system
dimming
item
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TW107134153A
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TW202013049A (en
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黃振誠
Chen-Cheng Huang
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明基電通股份有限公司
Benq Corporation
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Abstract

一種投影系統,包括一光源、一投影透鏡以及一調光光欄元件。光源用以發出一第一光線,第一光線具有一第一主波長範圍與一第二主波長範圍。投影透鏡設置於第一光線的路徑上。調光光欄元件設置於光源與投影透鏡之間,調光光欄元件具有一開口以及位於開口外側的一遮光區,開口內設有一濾光片,其中部分第一光線被遮光區阻擋,而通過開口之其餘第一光線中對應第一主波長範圍的波段通過開口,第二主波長範圍的波段被濾光片阻擋而成為一第二光線,使第二光線相對於第一光線具有一窄波長範圍。A projection system includes a light source, a projection lens, and a dimming light barrier element. The light source is used for emitting a first light, and the first light has a first dominant wavelength range and a second dominant wavelength range. The projection lens is disposed on a path of the first light. The dimming light barrier element is disposed between the light source and the projection lens. The dimming light barrier element has an opening and a light blocking area located outside the opening. A filter is arranged in the opening, and part of the first light is blocked by the light blocking area. Of the remaining first rays that pass through the opening, the band corresponding to the first main wavelength range passes through the opening, and the band of the second main wavelength range is blocked by the filter to become a second light, so that the second light has a narrow width relative to the first light. Wavelength range.

Description

投影系統Projection system

本發明是有關於一種投影系統,且特別是有關於一種具有寬色域影像輸出的投影系統。The invention relates to a projection system, and in particular to a projection system with a wide color gamut image output.

因應現今市場對電子產品的輕、薄、短、小的趨勢,傳統的投影機亦開始朝微型化及高色彩表現發展。微型投影機便於隨身攜帶,不僅可製成攜帶式微型投影機外,更應用於各式現有的電子產品上,例如內建於手機、多媒體播放器、筆記型電腦等,藉以擴充電子產品之功能多樣性。In response to the current trend of light, thin, short, and small electronic products in the market, traditional projectors have also begun to develop toward miniaturization and high color performance. Mini projectors are easy to carry around, not only can be made into portable mini projectors, but also applied to various existing electronic products, such as built-in mobile phones, multimedia players, notebook computers, etc., to expand the functions of electronic products Diversity.

在投影系統中,用以對發光元件的光線進行調整的光學元件例如光閥、透鏡等,光閥可為數位微鏡元件(Digital Micro-mirror Device, DMD)、液晶開關元件。為了光學上的高亮度表現,目前微型投影機多採用紅光、綠光、藍光三原色之發光二極體作為光源,直接將三色光線投射至數位微鏡元件(DMD)進行成像。In the projection system, optical elements such as light valves and lenses used to adjust the light of the light-emitting elements can be digital micro-mirror devices (DMDs) and liquid crystal switching elements. For optically high-brightness performance, micro projectors currently use light-emitting diodes of three primary colors of red, green, and blue as the light source, and directly project the three-color light onto a digital micromirror element (DMD) for imaging.

然而,在色彩表現上,黃光能量過高會影響綠光輸出的色座標位置,使得投影系統輸出的影像的色域變小,且綠光輸出的顏色偏黃而產生色差,因此無法滿足DCI-P3色域標準規範的寬色域需求。However, in terms of color performance, too high yellow light energy will affect the position of the color coordinates of the green light output, making the color gamut of the image output by the projection system smaller, and the color of the green light output being yellowish, resulting in chromatic aberration, so it cannot meet the DCI. -Wide color gamut requirements for the P3 color gamut standard.

本發明係有關於一種投影系統,可對影像光進行純化,以提高影像光的色彩表現。The invention relates to a projection system, which can purify image light to improve the color performance of the image light.

根據本發明之一方面,提出一種投影系統,包括一光源、一投影透鏡以及一調光光欄元件。光源用以發出一第一光線,第一光線具有一第一主波長範圍與一第二主波長範圍。投影透鏡設置於第一光線的路徑上。調光光欄元件設置於光源與投影透鏡之間,調光光欄元件具有一開口以及位於開口外側的一遮光區,開口內設有一濾光片,其中部分第一光線被遮光區阻擋,而通過開口之其餘第一光線中,對應第一主波長範圍的波段通過開口,第二主波長範圍的波段被濾光片阻擋而成為第二光線,使第二光線相對於第一光線具有一窄波長範圍。According to an aspect of the present invention, a projection system is provided, which includes a light source, a projection lens, and a dimming light barrier element. The light source is used for emitting a first light, and the first light has a first dominant wavelength range and a second dominant wavelength range. The projection lens is disposed on a path of the first light. The dimming light barrier element is disposed between the light source and the projection lens. The dimming light barrier element has an opening and a light blocking area located outside the opening. A filter is arranged in the opening, and part of the first light is blocked by the light blocking area. Of the remaining first rays of light passing through the opening, the band corresponding to the first main wavelength range passes through the opening, and the band of the second main wavelength range is blocked by the filter to become the second light, so that the second light has a narrow width relative to the first light. Wavelength range.

為了對本發明之上述及其他方面有更佳的瞭解,下文特舉實施例,並配合所附圖式詳細說明如下:In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are described in detail below in conjunction with the accompanying drawings:

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。以下是以相同/類似的符號表示相同/類似的元件做說明。The following is a detailed description of an embodiment. The embodiments are only used as examples and are not intended to limit the scope of the present invention. The following uses the same / similar symbols to indicate the same / similar components for explanation.

本實施例提出一種投影系統,用以投射一影像光於一螢幕上。如第2A圖所示,投影系統100包括一光源110,例如是發光二極體、雷射二極體、金屬滷素燈泡、UHE燈泡或UHP燈泡等適用於照明或光學投影之元件,統稱為發光元件。此外,發光元件發出的光線還可經由光學元件進行調整,光學元件可包括準直透鏡、均光元件(例如透鏡矩陣、積分柱)、投影透鏡等。另外,發光元件發出的光線還可經由其他光學元件進行調整,例如濾光裝置(例如色輪、彩色濾光片)、分光鏡、全內反射稜鏡(TIR PRISM)、具有屈光度的透鏡(例如場鏡)或者其他可對發光元件的光線進行調整的光學元件(例如光閥或光欄,光欄又可稱為光圈)。This embodiment provides a projection system for projecting an image light on a screen. As shown in FIG. 2A, the projection system 100 includes a light source 110, such as a light emitting diode, a laser diode, a metal halide bulb, a UHE bulb, or a UHP bulb, which are suitable for lighting or optical projection, and are collectively referred to as light emitting. element. In addition, the light emitted by the light-emitting element can also be adjusted through an optical element. The optical element may include a collimating lens, a light-equalizing element (such as a lens matrix, an integrating column), a projection lens, and the like. In addition, the light emitted by the light emitting element can be adjusted by other optical elements, such as a filter device (such as a color wheel, a color filter), a beam splitter, a TIR PRISM, and a lens having a refractive power (such as Field lens) or other optical elements that can adjust the light of the light emitting element (such as a light valve or a light barrier, which can also be called an aperture).

光閥可為數位微鏡元件(DMD)、液晶開關元件或是其他可將發光元件發出的光線轉成影像光並且以電能驅動的元件或裝置,常見應用於數位式投影系統中。The light valve can be a digital micromirror element (DMD), a liquid crystal switching element, or other elements or devices that can convert light emitted from the light emitting element into image light and is driven by electrical energy. It is commonly used in digital projection systems.

光欄設置於透鏡之後,用以限制經過此透鏡的光束的直徑大小。一般而言,光欄對入射光的邊緣能量具有消減作用,避免入射光的邊緣能量過高而影響對比。請參照第2A及2B圖,本發明之投影系統100可藉由在適當的光路中設置調光光欄元件140,使特定主波長範圍的波段通過開口142,並阻擋(例如以濾光片143濾除)另一主波長範圍的波段,以對影像光進行純化,進而提高影像光的色彩表現。The light barrier is arranged behind the lens to limit the diameter of the light beam passing through the lens. In general, the light bar has a reducing effect on the edge energy of the incident light, and avoids the edge energy of the incident light being too high to affect the contrast. Please refer to FIGS. 2A and 2B. The projection system 100 of the present invention can provide a dimming light barrier element 140 in an appropriate optical path, so that a band of a specific main wavelength range passes through the opening 142 and blocks (for example, a filter 143). Filtering out) another wavelength band of the main wavelength range to purify the image light, thereby improving the color performance of the image light.

如第4及5圖所示,調光光欄元件140例如為一整片濾光元件141所組成,並於濾光元件上以遮蔽方式形成遮光區144,只留下開口142可透光。例如,以不透光材料塗佈、蒸鍍或黏貼的方式形成遮光區144。不透光材料例如是黑色消光漆。或者,在另一實施例中,調光光欄元件140例如為一不透光金屬元件,並於金屬元件上沖壓出開口142,再將濾光片143以鑲嵌方式鑲嵌於開口142中。如第4及5圖所示,調光光欄元件140具有一開口142以及位於開口142外側的一遮光區144,開口142內設有一濾光片143,遮光區144可阻擋部分入射光(虛線區域表示入射光的截面輪廓AC)而使部分入射光通過開口142。濾光片143可為整片濾光元件141的一部分或僅為鑲嵌於開口142中的一元件。在本實施例中,入射光的截面直徑大於開口142的直徑。As shown in FIGS. 4 and 5, the dimming light barrier element 140 is composed of, for example, a whole piece of filter element 141, and a light-shielding region 144 is formed on the filter element in a shielding manner, leaving only the opening 142 to transmit light. For example, the light-shielding region 144 is formed by applying, vapor-depositing, or pasting an opaque material. The opaque material is, for example, a black matte paint. Alternatively, in another embodiment, the dimming light barrier element 140 is, for example, an opaque metal element, and the opening 142 is punched out from the metal element, and the filter 143 is embedded in the opening 142 in a mosaic manner. As shown in FIGS. 4 and 5, the dimming light barrier element 140 has an opening 142 and a light-shielding region 144 located outside the opening 142. A filter 143 is provided in the opening 142. The light-shielding region 144 can block part of the incident light (dotted line). The area represents the cross-sectional profile AC of the incident light) and a part of the incident light passes through the opening 142. The filter 143 may be a part of the entire filter element 141 or only an element embedded in the opening 142. In this embodiment, the cross-sectional diameter of the incident light is larger than the diameter of the opening 142.

請參照第1A及1B圖,其分別繪示各色光波長的穿透率示意圖,其中發光元件發出的第一光線L1包括一第一主波長範圍W1以及一第二主波長範圍W2。在一實施例中,透過調光光欄元件140的濾光片143將發光元件發出的第一光線L1中對應第一主波長範圍W1的波段通過開口142,並阻擋第一光線L1中對應第二主波長範圍W2的波段而成為第二光線L2,以使第二光線L2相對於第一光線L1具有一窄波長範圍。Please refer to FIG. 1A and FIG. 1B, which respectively show schematic diagrams of transmittance of light wavelengths of different colors. The first light L1 emitted from the light emitting element includes a first main wavelength range W1 and a second main wavelength range W2. In an embodiment, the filter 143 of the dimming light barrier element 140 passes the band corresponding to the first main wavelength range W1 in the first light L1 emitted by the light-emitting element through the opening 142 and blocks the corresponding light in the first light L1. The two main wavelength ranges W2 become the second light L2, so that the second light L2 has a narrow wavelength range relative to the first light L1.

在一實施例中,第一主波長範圍W1例如是代表綠光波長的550nm波長範圍,第二主波長範圍W2例如是代表黃光波長的570nm波長範圍。對應第一主波長範圍W1的綠光能量波段能通過調光光欄元件140的開口142,而對應第二主波長範圍W2的黃光能量波段被濾光片143阻擋而消減,因此,投影系統100可精確輸出純化後的綠光能量波段,以逼近真實的色彩表現,進而達到DCI-P3色域標準規範的寬色域需求。當然,本發明之投影系統100不限定對綠光能量波段的入射光進行純化,亦可對藍光能量波段Wb或紅光能量波段Wr的入射光進行純化。In an embodiment, the first main wavelength range W1 is, for example, a 550nm wavelength range representing a green light wavelength, and the second main wavelength range W2 is, for example, a 570nm wavelength range representing a yellow light wavelength. The green light energy band corresponding to the first main wavelength range W1 can pass through the opening 142 of the dimming light barrier element 140, while the yellow light energy band corresponding to the second main wavelength range W2 is blocked by the filter 143 and reduced. Therefore, the projection system 100 can accurately output the purified green light energy band to approximate the true color performance, and then meet the wide color gamut requirements of the DCI-P3 color gamut standard. Of course, the projection system 100 of the present invention is not limited to purifying the incident light in the green light energy band, but may also purify the incident light in the blue light energy band Wb or the red light energy band Wr.

請參照第2A及2B圖,其分別繪示依照本發明二實施例之投影系統100的示意圖。投影系統100例如包括一光源110、一濾光裝置112、一光管114、至少一聚光透鏡116、一反射鏡118、一數位微鏡元件120、一投影透鏡130以及一調光光欄元件140。如第4圖所示,調光光欄元件140具有一開口142以及位於開口142外側的一遮光區144。開口142形狀例如為圓形,且開口142邊緣例如具有一內凹輪廓141b(參見第4圖)或一環狀輪廓141c(參見第5圖),用以阻擋部分第一光線L1。調光光欄元件140設置於光源110與投影透鏡130之間。調光光欄元件140的位置例如位於第2A圖中的A點位置或第2B圖中的B點位置。Please refer to FIGS. 2A and 2B, which are schematic diagrams of a projection system 100 according to two embodiments of the present invention, respectively. The projection system 100 includes, for example, a light source 110, a filter device 112, a light pipe 114, at least one condenser lens 116, a reflector 118, a digital micromirror element 120, a projection lens 130, and a dimming light barrier element 140. As shown in FIG. 4, the dimming light barrier element 140 has an opening 142 and a light shielding region 144 located outside the opening 142. The shape of the opening 142 is, for example, circular, and the edge of the opening 142 has, for example, a concave contour 141 b (see FIG. 4) or a ring-shaped contour 141 c (see FIG. 5) to block part of the first light L1. The dimming light barrier element 140 is disposed between the light source 110 and the projection lens 130. The position of the dimming light barrier element 140 is, for example, a point A position in FIG. 2A or a point B position in FIG. 2B.

光源110用以發出一可見光L(例如白光或單色光)。投影透鏡130設置於第一光線L1的路徑上,可見光L可經由濾光裝置112(例如色輪或濾光片)過濾後成為一第一光線L1(第一色光),使可見光L中的第一光線L1(第一色光)通過而進入光管114中,並經由聚光透鏡116、反射鏡118及數位微鏡元件120調整後而到達投影透鏡130,以形成投影所需要的影像光。當然,光源110亦可直接發出第一光線L1(第一色光)而不需經過光管114或濾光處理。The light source 110 is configured to emit a visible light L (for example, white light or monochromatic light). The projection lens 130 is disposed on the path of the first light L1. The visible light L can be filtered by the filtering device 112 (such as a color wheel or a filter) to become a first light L1 (the first color light). The first light L1 (the first color light) passes through the light pipe 114 and is adjusted by the condenser lens 116, the mirror 118, and the digital micromirror element 120 to reach the projection lens 130 to form the image light required for projection. . Of course, the light source 110 can also directly emit the first light L1 (the first color light) without going through the light pipe 114 or the filtering process.

如第1A及1B圖所示,第一光線L1具有一第一主波長範圍W1與一第二主波長範圍W2。第一光線L1中對應第一主波長範圍W1的波段可通過調光光欄元件140的開口142,並阻擋第一光線L1中對應第二主波長範圍W2的波段而成為一第二光線L2,使第二光線L2相對於第一光線L1具有一窄波長範圍。As shown in FIGS. 1A and 1B, the first light ray L1 has a first dominant wavelength range W1 and a second dominant wavelength range W2. The band corresponding to the first main wavelength range W1 in the first light L1 can pass through the opening 142 of the dimming barrier element 140 and block the band corresponding to the second main wavelength range W2 in the first light L1 to become a second light L2. The second light L2 has a narrow wavelength range relative to the first light L1.

在一實施例中,光管114設置於光源110與投影透鏡130之間,光管114用以將第一光線L1限制於通往投影透鏡130的光路上。聚光透鏡116設置於光管114與數位微鏡元件120之間。反射鏡118設置於聚光透鏡116與數位微鏡元件120之間,用以反射第一光線L1或第二光線L2至數位微鏡元件120。In one embodiment, the light pipe 114 is disposed between the light source 110 and the projection lens 130. The light pipe 114 is used to limit the first light L1 to the light path leading to the projection lens 130. The condenser lens 116 is disposed between the light pipe 114 and the digital micromirror element 120. The reflecting mirror 118 is disposed between the condenser lens 116 and the digital micromirror element 120 to reflect the first light L1 or the second light L2 to the digital micromirror element 120.

數位微鏡元件120設置於第一光線L1或第二光線L2通往投影透鏡130的光路上,數位微鏡元件120包括多個微型反射鏡面(圖未繪示),其角度可調整。微型反射鏡118面用以反射第一光線L1或第二光線L2至投影透鏡130而成為影像光,或者調整反射鏡面的角度使第一光線L1或第二光線L2反射至暗態光路上,因而不輸出影像光。The digital micromirror element 120 is disposed on a light path from the first light L1 or the second light L2 to the projection lens 130. The digital micromirror element 120 includes a plurality of micro-reflective mirror surfaces (not shown), and the angle thereof can be adjusted. The surface of the micro-mirror 118 is used to reflect the first light L1 or the second light L2 to the projection lens 130 to become image light, or the angle of the mirror surface is adjusted so that the first light L1 or the second light L2 is reflected to the dark light path, so No image light is output.

調光光欄元件140位於光管114後方的光欄位置上,也就是在光管114與投影透鏡130之間的光欄位置上。例如,在第2A圖中,調光光欄元件140位於光管114與反射鏡118之間的光欄位置或二個聚光透鏡116之間的光欄位置。至少一聚光透鏡116位於光管114與數位微鏡元件120之間。或者,在第2B圖中,調光光欄元件140位於數位微鏡元件120與投影透鏡130之間的光欄位置。The dimming light barrier element 140 is located at the light barrier position behind the light pipe 114, that is, at the light barrier position between the light pipe 114 and the projection lens 130. For example, in FIG. 2A, the dimming light barrier element 140 is located at the light barrier position between the light pipe 114 and the reflector 118 or the light barrier position between the two condenser lenses 116. At least one condenser lens 116 is located between the light pipe 114 and the digital micromirror element 120. Alternatively, in FIG. 2B, the dimming light barrier element 140 is located at the light barrier position between the digital micromirror element 120 and the projection lens 130.

請參照第3圖,其繪示依照本發明另一實施例之調光光欄元件140的位置示意圖。在本實施例中,投影系統100更可包括一成像透鏡組132,其設置於投影透鏡130與反射鏡118之間。調光光欄元件140例如位於投影透鏡130與成像透鏡組132之間的光欄位置上,可對第一光線L1進行純化且阻擋部分第一光線L1,以使通過調光光欄元件140的開口142的第二光線L2具有一窄波長範圍。Please refer to FIG. 3, which is a schematic diagram illustrating a position of a dimming light barrier element 140 according to another embodiment of the present invention. In this embodiment, the projection system 100 may further include an imaging lens group 132, which is disposed between the projection lens 130 and the reflector 118. The dimming light barrier element 140 is, for example, located at the position of the light barrier between the projection lens 130 and the imaging lens group 132, and can purify the first light L1 and block part of the first light L1, so that The second light L2 of the opening 142 has a narrow wavelength range.

上述的投影透鏡130可由至少一片的光學透鏡所組成,用於調整自數位微鏡元件120輸出而投影於螢幕上的影像光。另外,本發明之投影系統100以一殼體或一外罩包覆前述的光源110、濾光裝置112、聚光透鏡116、調光光欄元件140、反射鏡118、數位微鏡元件120、投影透鏡130等元件,僅顯露出投影透鏡130的出光面於殼體,以使影像光投射於殼體之外。The above-mentioned projection lens 130 may be composed of at least one optical lens for adjusting the image light output from the digital micromirror element 120 and projected on the screen. In addition, the projection system 100 of the present invention covers the aforementioned light source 110, filter device 112, condenser lens 116, dimming light barrier element 140, reflector 118, digital micromirror element 120, and projection with a casing or a cover. Elements such as the lens 130 only expose the light-emitting surface of the projection lens 130 to the casing, so that the image light is projected outside the casing.

請參照第4圖,調光光欄元件140的開口142不限定為圓形,亦可為其他幾何圖案,例如正方形開口、長方形開口、水滴形、橢圓形、菱形、扇形或其他形狀等。此外,調光光欄元件140的開口142具有一外凸輪廓141a以及一內凹輪廓141b,如同具有缺角的非圓形開口。在第4圖中,開口142以外的部分皆不透光。Referring to FIG. 4, the opening 142 of the dimming light barrier element 140 is not limited to a circle, and may be other geometric patterns, such as a square opening, a rectangular opening, a drop shape, an oval shape, a diamond shape, a fan shape, or other shapes. In addition, the opening 142 of the dimming light barrier element 140 has an outwardly convex profile 141a and an inwardly concave profile 141b, like a non-circular opening with a notch. In FIG. 4, parts other than the opening 142 are opaque.

請參照第5圖,在另一實施例中,遮光區144例如環繞開口142的周圍,使中間部分成為圓形、橢圓形或其他形狀之透光區。在第5圖中,開口142以外的部分皆不透光。開口142的輪廓不限定為圓形,也有可能是橢圓或其他形狀。Referring to FIG. 5, in another embodiment, the light-shielding region 144 surrounds the periphery of the opening 142, for example, so that the middle portion becomes a circular, elliptical or other shape light-transmitting region. In FIG. 5, parts other than the opening 142 are opaque. The outline of the opening 142 is not limited to a circle, and may be an ellipse or other shapes.

調光光欄元件140的功能如同光欄及濾光片的組合,發光元件發出的第一光線L1中對應第一主波長範圍W1的波段(例如綠光波長的550nm波長範圍)可通過調光光欄元件140的開口142,並過濾例如黃光波長的570nm波長範圍之波段。因此,本發明上述實施例所揭露之投影系統100可精確輸出純化後的綠光能量波段,以逼近真實的色彩表現,進而達到DCI-P3色域標準規範的寬色域需求。The function of the dimming light barrier element 140 is like a combination of a light barrier and a filter. The first light L1 emitted by the light emitting element corresponding to the first main wavelength range W1 (for example, the green wavelength 550nm wavelength range) can be dimmed The opening 142 of the light barrier element 140 filters a wavelength band of a wavelength range of 570 nm, for example, a wavelength of yellow light. Therefore, the projection system 100 disclosed in the above embodiments of the present invention can accurately output the purified green light energy band to approximate the true color performance, thereby meeting the wide color gamut requirements of the DCI-P3 color gamut standard.

此外,本發明上述實施例所揭露之投影系統100可將部分入射光的邊緣能量消減而形成暗場,進而提高色彩的對比。In addition, the projection system 100 disclosed in the above embodiments of the present invention can reduce the edge energy of part of the incident light to form a dark field, thereby improving the contrast of colors.

綜上所述,雖然本發明已以實施例揭露如上,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 present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains 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.

100‧‧‧投影系統100‧‧‧ projection system

110‧‧‧光源 110‧‧‧light source

112‧‧‧濾光裝置 112‧‧‧ Filter Device

114‧‧‧光管 114‧‧‧light tube

116‧‧‧聚光透鏡 116‧‧‧ condenser lens

118‧‧‧反射鏡 118‧‧‧Reflector

120‧‧‧數位微鏡元件 120‧‧‧digital micromirror element

130‧‧‧投影透鏡 130‧‧‧ projection lens

132‧‧‧成像透鏡組 132‧‧‧imaging lens group

140‧‧‧調光光欄元件 140‧‧‧ Dimmable Light Bar Element

141‧‧‧濾光元件 141‧‧‧ Filter element

141a‧‧‧外凸輪廓 141a‧‧‧ convex contour

141b‧‧‧內凹輪廓 141b‧‧‧ concave contour

141c‧‧‧環狀輪廓 141c‧‧‧Circle contour

142‧‧‧開口 142‧‧‧ opening

143‧‧‧濾光片 143‧‧‧ Filter

144‧‧‧遮光區 144‧‧‧ shaded area

L‧‧‧可見光 L‧‧‧visible light

L1‧‧‧第一光線 L1‧‧‧First Light

L2‧‧‧第二光線 L2‧‧‧Second Light

W1‧‧‧第一主波長範圍 W1‧‧‧first dominant wavelength range

W2‧‧‧第二主波長範圍 W2‧‧‧second dominant wavelength range

Wb‧‧‧藍光能量波段 Wb‧‧‧Blue light energy band

Wr‧‧‧紅光能量波段 Wr‧‧‧ red light energy band

A、B‧‧‧光欄位置 A, B‧‧‧ Light Bar Position

AC‧‧‧截面輪廓 AC‧‧‧ cross-section profile

第1A及1B圖分別繪示各色光波長的穿透率示意圖。 第2A及2B圖分別繪示依照本發明二實施例之投影系統的示意圖。 第3圖繪示依照本發明另一實施例之調光光欄元件的位置示意圖。 第4圖繪示依照本發明一實施例之投影系統中的調光光欄元件的示意圖。 第5圖繪示依照本發明另一實施例之投影系統中的調光光欄元件的示意圖。Figures 1A and 1B are schematic diagrams showing the transmittances of the light wavelengths of the respective colors. 2A and 2B are schematic diagrams of a projection system according to two embodiments of the present invention, respectively. FIG. 3 is a schematic diagram illustrating a position of a dimming light barrier element according to another embodiment of the present invention. FIG. 4 is a schematic diagram of a dimming light barrier element in a projection system according to an embodiment of the present invention. FIG. 5 is a schematic diagram of a dimming light barrier element in a projection system according to another embodiment of the present invention.

Claims (10)

一種投影系統,包括: 一光源,用以發出一第一光線,該第一光線具有一第一主波長範圍與一第二主波長範圍; 一投影透鏡,設置於該第一光線的路徑上;以及 一調光光欄元件,設置於該光源與該投影透鏡之間,該調光光欄元件具有一開口以及位於該開口外側的一遮光區,該開口內設有一濾光片,其中部分該第一光線被該遮光區阻擋,而通過該開口之其餘該第一光線中,對應該第一主波長範圍的波段通過該開口,該第二主波長範圍的波段被該濾光片阻擋而成為一第二光線,使該第二光線相對於該第一光線具有一窄波長範圍。A projection system includes: a light source for emitting a first light, the first light having a first main wavelength range and a second main wavelength range; a projection lens disposed on a path of the first light; And a dimming light barrier element disposed between the light source and the projection lens, the dimming light barrier element has an opening and a light shielding area outside the opening, and a filter is arranged in the opening, and part of the The first light is blocked by the light-shielding region, and among the remaining first light passing through the opening, a band corresponding to the first main wavelength range passes through the opening, and the second main wavelength range is blocked by the filter to become A second light, so that the second light has a narrow wavelength range relative to the first light. 如申請專利範圍第1項所述之投影系統,其中該光源用以發出一可見光,該投影系統更包括一濾光裝置,用以過濾該可見光,使該可見光中的該第一光線通過。The projection system according to item 1 of the patent application scope, wherein the light source is used to emit a visible light, and the projection system further comprises a filtering device for filtering the visible light so that the first light in the visible light passes through. 如申請專利範圍第2項所述之投影系統,更包括一光管,用以將該第一光線限制於通往該投影透鏡的光路上,其中該調光光欄元件位於該光管與該投影透鏡之間。The projection system according to item 2 of the patent application scope further includes a light pipe for limiting the first light to the light path leading to the projection lens, wherein the dimming light barrier element is located between the light pipe and the light pipe. Between the projection lenses. 如申請專利範圍第3項所述之投影系統,更包括一數位微鏡元件,設置於該第一光線或該第二光線通往該投影透鏡的光路上,該數位微鏡元件包括複數個微型反射鏡面,其中該調光光欄元件位於該光管與該數位微鏡元件之間或該數位微鏡元件與該投影透鏡之間,該投影系統更包括至少一聚光透鏡以及一反射鏡,該聚光透鏡設置於該光管與該數位微鏡元件之間,該反射鏡設置於該聚光透鏡與該數位微鏡元件之間,用以反射該第一光線或該第二光線至該些微型反射鏡面,其中第一光線或該第二光線入射至該些微型反射鏡面的角度可調整。The projection system according to item 3 of the scope of patent application, further comprising a digital micromirror element disposed on the optical path of the first light or the second light to the projection lens. The digital micromirror element includes a plurality of micro A reflective mirror surface, wherein the dimming light barrier element is located between the light pipe and the digital micromirror element or between the digital micromirror element and the projection lens, and the projection system further includes at least a condenser lens and a reflective mirror, The condenser lens is disposed between the light pipe and the digital micromirror element, and the reflector is disposed between the condenser lens and the digital micromirror element to reflect the first light or the second light to the For these micro-mirror surfaces, the angle at which the first light or the second light enters the micro-mirror surfaces can be adjusted. 如申請專利範圍第1項所述之投影系統,其中該調光光欄元件的該開口形狀為圓形。The projection system according to item 1 of the scope of patent application, wherein the opening shape of the dimming light barrier element is circular. 如申請專利範圍第5項所述之投影系統,其中該調光光欄元件的該圓形開口邊緣更具有一內凹輪廓。The projection system according to item 5 of the patent application, wherein the circular opening edge of the dimming light barrier element further has a concave contour. 如申請專利範圍第1項所述之投影系統,其中該遮光區環繞該開口周圍,使中間部分成為圓形或橢圓形之透光區。The projection system according to item 1 of the scope of patent application, wherein the light-shielding area surrounds the periphery of the opening, so that the middle part becomes a circular or elliptical light-transmitting area. 如申請專利範圍第6項或第7項所述之投影系統,其中該調光光欄元件為一整片濾光元件所組成,並於該濾光元件上,以遮蔽方式形成該遮光區,只留下該開口可透光。The projection system according to item 6 or item 7 of the scope of patent application, wherein the dimming light barrier element is composed of a whole piece of filter element, and the light shielding area is formed on the filter element in a shielding manner, Only the opening is left transparent. 如申請專利範圍第8項所述之投影系統,其中該調光光欄元件之遮蔽方式為以不透光材料塗佈,蒸鍍或黏貼。The projection system according to item 8 of the scope of patent application, wherein the dimming light barrier element is shielded by coating, vapor-depositing, or pasting with an opaque material. 如申請專利範圍第6項或第7項所述之投影系統,其中該濾光片以鑲嵌方式鑲嵌於該開口中。The projection system according to item 6 or item 7 of the patent application scope, wherein the filter is embedded in the opening in a mosaic manner.
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Citations (4)

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TW201137394A (en) * 2009-12-10 2011-11-01 Nikon Corp Spatial light modulator, illumination optical system, exposure apparatus, and method for manufacturing device
CN103777257A (en) * 2012-10-17 2014-05-07 精工爱普生株式会社 Optical element storage package, optical filter device, optical module, and electronic apparatus
CN104062835A (en) * 2013-03-19 2014-09-24 松下电器产业株式会社 Projection Display Device
CN105025280A (en) * 2014-04-30 2015-11-04 深圳市绎立锐光科技开发有限公司 Light source system and projector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201137394A (en) * 2009-12-10 2011-11-01 Nikon Corp Spatial light modulator, illumination optical system, exposure apparatus, and method for manufacturing device
CN103777257A (en) * 2012-10-17 2014-05-07 精工爱普生株式会社 Optical element storage package, optical filter device, optical module, and electronic apparatus
CN104062835A (en) * 2013-03-19 2014-09-24 松下电器产业株式会社 Projection Display Device
CN105025280A (en) * 2014-04-30 2015-11-04 深圳市绎立锐光科技开发有限公司 Light source system and projector

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