TW202246852A - Laser light source depolarizer and projection device having the same - Google Patents
Laser light source depolarizer and projection device having the same Download PDFInfo
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本揭露是有關於一種雷射光源解偏器以及具有雷射光源解偏器的投影機設備。The present disclosure relates to a laser light source depolarizer and a projector device with the laser light source depolarizer.
現行的雷射光源投影機大多採用獨立的光學系統進行光耦合,將不同顏色的雷射光源合併成單一光軸。Most of the current laser light source projectors use an independent optical system for optical coupling, combining laser light sources of different colors into a single optical axis.
由於雷射光為偏振光,若應用於背投影架構,則容易因為背投影架構的屏幕本身的內應力造成雷射光通過時產生色塊的現象。若將雷射光源應用於偏振式3D眼鏡,則容易使觀看者察覺不均勻的光極化性,使得視覺上產生色塊。Since the laser light is polarized light, if it is applied to the rear projection structure, it is easy to cause color blocks when the laser light passes through due to the internal stress of the screen itself of the rear projection structure. If the laser light source is applied to the polarized 3D glasses, it is easy for the viewer to perceive the uneven polarization of the light, resulting in color blocks visually.
有鑑於此,如何提供一種可解決上述問題的投影機系統雷射光源,仍是目前業界亟需研究的目標之一。In view of this, how to provide a laser light source for a projector system that can solve the above-mentioned problems is still one of the goals that the industry needs to study urgently.
本揭露之一技術態樣為一種雷射光源解偏器。One technical aspect of the present disclosure is a laser light source depolarizer.
在本揭露一實施例中,雷射光源解偏器包含雷射光源、光束角度調整元件、雙折射晶體以及積分器。雷射光源配置以發出雷射光。光束角度調整元件配置以改變雷射光的擴散角度。光束角度調整元件位在雷射光源與雙折射晶體之間。雙折射晶體位在光束角度調整元件與積分器之間,雙折射晶體配置以破壞該雷射光的極性。In an embodiment of the present disclosure, the laser light source depolarizer includes a laser light source, a beam angle adjustment element, a birefringent crystal, and an integrator. The laser light source is configured to emit laser light. The beam angle adjustment element is configured to change the spread angle of the laser light. The beam angle adjusting element is located between the laser light source and the birefringent crystal. A birefringent crystal is located between the beam angle adjustment element and the integrator, and the birefringent crystal is configured to destroy the polarity of the laser light.
在本揭露一實施例中,雙折射晶體面對光束角度調整元件的表面與雙折射晶體面對積分器的表面互相平行。In an embodiment of the present disclosure, the surface of the birefringent crystal facing the beam angle adjustment element and the surface of the birefringent crystal facing the integrator are parallel to each other.
在本揭露一實施例中,雙折射晶體為一體成形。In an embodiment of the present disclosure, the birefringent crystal is integrally formed.
在本揭露一實施例中,光束角度調整元件為擴散片或透鏡。In an embodiment of the present disclosure, the beam angle adjusting element is a diffuser or a lens.
在本揭露一實施例中,雷射光源解偏器還包含光學膠層,位在光束角度調整元件與雙折射晶體之間。In an embodiment of the present disclosure, the laser light source depolarizer further includes an optical glue layer located between the beam angle adjustment element and the birefringent crystal.
在本揭露一實施例中,光學膠層接觸雙折射晶體。In an embodiment of the present disclosure, the optical adhesive layer is in contact with the birefringent crystal.
在本揭露一實施例中,雷射光源解偏器還包含光學膠層,位在雙折射晶體與積分器之間。In an embodiment of the present disclosure, the laser light source depolarizer further includes an optical glue layer located between the birefringent crystal and the integrator.
在本揭露一實施例中,雙折射晶體具有抗反射膜。In an embodiment of the present disclosure, the birefringent crystal has an anti-reflection film.
在本揭露一實施例中,雙折射晶體面對光束角度調整元件的表面與雙折射晶體面對積分器的表面具有夾角。In an embodiment of the present disclosure, the surface of the birefringent crystal facing the beam angle adjustment element and the surface of the birefringent crystal facing the integrator have an included angle.
本揭露之另一技術態樣為一種投影機設備。Another technical aspect of the present disclosure is a projector device.
在本揭露一實施例中,投影機設備包含雷射解偏器、屏幕以及投影模組。屏幕具有位在相反兩側的投影面及觀看面。投影模組接收從積分器出來的光線,並將光線轉化為畫面投射至屏幕。投影模組位在屏幕的投影面。In an embodiment of the present disclosure, a projector device includes a laser depolarizer, a screen, and a projection module. The screen has a projection surface and a viewing surface on opposite sides. The projection module receives the light from the integrator, converts the light into a picture and projects it to the screen. The projection module is located on the projection surface of the screen.
在上述實施例中,雷射光源解偏器透過光束角度調整元件降低雷射光的光準直性以增加雷射光的擴散角度,並透過雙折射晶體破壞雷射光的光極化性。接著,透過積分器均勻化雷射光。如此一來,可使得通過積分器後的雷射光適合應用於投影機設備中,例如背投影架構或偏振式的3D眼鏡。因藉由雷射光源解偏器破壞雷射光的光準直性以及光極化性,可提升顯示畫面的均勻度、減少色塊並提高投影畫面的品質。In the above embodiments, the laser light source depolarizer reduces the optical collimation of the laser light through the beam angle adjustment element to increase the diffusion angle of the laser light, and destroys the optical polarization of the laser light through the birefringent crystal. Next, the laser light is homogenized by an integrator. In this way, the laser light passing through the integrator can be suitable for use in projector equipment, such as rear projection architecture or polarized 3D glasses. Because the optical collimation and optical polarization of the laser light are destroyed by the depolarizer of the laser light source, the uniformity of the display image can be improved, color blocks can be reduced, and the quality of the projected image can be improved.
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。且為了清楚起見,圖式中之層和區域的厚度可能被誇大,並且在圖式的描述中相同的元件符號表示相同的元件。Several embodiments of the present invention will be disclosed in the following figures. For the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some well-known structures and components will be shown in a simple and schematic manner in the drawings. Also, the thicknesses of layers and regions in the drawings may be exaggerated for clarity, and the same reference numerals denote the same elements in the description of the drawings.
第1圖為根據本揭露一實施例之雷射光源解偏器100的示意圖。雷射光源解偏器100包含雷射光源110、光束角度調整元件120、雙折射晶體130以及積分器140。雷射光源110配置以發出雷射光L1。光束角度調整元件120配置以改變雷射光L1的擴散角度θ。光束角度調整元件120位在雷射光源110與雙折射晶體130之間。雙折射晶體130位在光束角度調整元件120與積分器140之間。FIG. 1 is a schematic diagram of a laser
光束角度調整元件120配置以改變雷射光L1的行進方向。換句話說,光束角度調整元件120可增加雷射光L1的擴散角度θ,以破壞雷射光L1的準直性。光束角度調整元件120、雙折射晶體130以及積分器140排列於雷射光L1的行進方向,即圖中的第一方向D1上。雙折射晶體130配置以破壞通過光束角度調整元件120後的雷射光L2的極性。積分器140配置以均勻化通過雙折射晶體130後的雷射光L3以傳輸至投影機設備的投影模組中。The beam
在一實施例中,光束角度調整元件120可以是擴散片。在其他實施例中,光束角度調整元件120可以是透鏡。舉例來說,光束角度調整元件120可為菲涅耳透鏡(Fresnel Lens)或者具有不同屈光度的透鏡,只要是可以增加雷射光L1的擴散角度θ以破壞雷射光L1的準直性之光學元件即可。In an embodiment, the beam
在本實施例中,通過光束角度調整元件120後的雷射光L2具有不同行進方向,使得雷射光L2進入雙折射晶體130時已具有不同的光程差。因此,在本實施例中,雙折射晶體130面對光束角度調整元件120的表面132與雙折射晶體130面對積分器140的表面134可為互相平行的。換句話說,本實施例中的雙折射晶體130可不必具有斜角。此外,本實施例中的雙折射晶體130為一體成形。在一些實施例中,雙折射晶體130面對光束角度調整元件120的表面132可具有鍍膜,例如抗反射膜(AR coating),以降低雷射光L2被反射的機率,提升雷射光L2的穿透率。在一些實施例中,雷射光源解偏器100還具有匯聚光線的透鏡(圖未示),設置在雙折射晶體130與積分器140之間,但本揭露並不以此為限。In this embodiment, the laser light L2 passing through the beam
根據上述可知,本揭露的雷射光源解偏器100透過光束角度調整元件120降低雷射光L1的光準直性以增加雷射光L1的擴散角度θ,並透過雙折射晶體130破壞雷射光L2的光極化性。接著,透過積分器140均勻化雷射光L3。如此一來,可使得通過積分器140後的雷射光L4適合應用於投影機設備中。具體來說,採用多色雷射光的投影機設備,可先使各色雷射光源透過雷射光源解偏器100後再進行光耦合之操作。According to the above, the laser light source depolarizer 100 of the present disclosure reduces the optical collimation of the laser light L1 through the beam
第2圖為第1圖之雷射光源解偏器100應用於投影機設備10中的示意圖。投影機設備10包含雷射光源解偏器100以及投影系統200。如第1圖中所述,依序經過光束角度調整元件120、雙折射晶體130以及積分器140後的雷射光L4行進至投影系統200。在本實施例中,投影機設備10是應用在背投影架構中。投影系統200接收從積分器140出來的雷射光L4,並將雷射光L4轉化為投影畫面投射至薄型屏幕300上,且觀看者400與投影機設備10位在薄型屏幕300的相反兩側,例如投影面304與觀看面302。FIG. 2 is a schematic diagram of applying the laser
薄型屏幕300在製造過程中,可能因加熱等製程產生內應力。當具有高準直性及單極化性的雷射光通過時,會產生不均勻的吸收效果而導致顯示畫面上出現色塊。因此,藉由雷射光源解偏器100破壞雷射光的光準直性以及光極化性,可提升顯示畫面的均勻度、減少色塊並提高投影畫面的品質。During the manufacturing process of the thin screen 300, internal stress may be generated due to processes such as heating. When laser light with high collimation and single polarization passes through, it will produce uneven absorption effect and cause color blocks to appear on the display screen. Therefore, by destroying the optical collimation and optical polarization of the laser light by the laser
在一些其他實施例中,雷射光源解偏器100也可應用於搭配偏振式的3D眼鏡的投影設備。由於雷射光具有高極化性的,觀看者透過偏振式的3D眼鏡容易察覺不均勻的光極化性。因此,藉由雷射光源解偏器100破壞雷射光的光準直性以及光極化性,可提升顯示畫面的均勻度、減少色塊並提高投影畫面的品質。In some other embodiments, the laser
第3圖為根據本揭露另一實施例之雷射光源解偏器100a的示意圖。雷射光源解偏器100a與第1圖所示的雷射光源解偏器100大致相同,其差異在於雷射光源解偏器100a還包含位在光束角度調整元件120與雙折射晶體130之間的光學膠層150。在此實施例中,光學膠層150黏合光束角度調整元件120與雙折射晶體130。換句話說,光學膠層150接觸雙折射晶體130的表面132a。光學膠層150可減少雷射光L2的界面反射,因此雙折射晶體130a的表面132a可不必具有前述的抗反射膜。此外,由於光學膠層150可具有較薄的厚度,因此可避免產生光減損的影響。FIG. 3 is a schematic diagram of a laser
在本實施例中,雷射光源解偏器100a還包含位在雙折射晶體130與積分器140之間的光學膠層160。光學膠層160黏合雙折射晶體130與積分器140。在一些實施例中,雷射光源解偏器100a也可以只具有光學膠層160,而不具有光學膠層150。雷射光源解偏器100a與第1圖所示的雷射光源解偏器100具有相同的技術功效,於此不再贅述。In this embodiment, the laser
第4圖為根據本揭露另一實施例之雷射光源解偏器100b的示意圖。雷射光源解偏器100b與第1圖所示的雷射光源解偏器100大致相同,其差異在於雷射光源解偏器100b的雙折射晶體130b為楔形。雙折射晶體130b的表面132a與表面134a具有夾角。換句話說,雙折射晶體130b可使雷射光L2進一步形成光程差,以破壞雷射光L2的光極化性。雷射光源解偏器100b也可具有匯聚光線的透鏡(圖未示),設置在雙折射晶體130b與積分器140之間,但本揭露並不以此為限。FIG. 4 is a schematic diagram of a laser
第5圖為根據本揭露另一實施例之雷射光源解偏器100c的示意圖。雷射光源解偏器100c與第4圖所示的雷射光源解偏器100b大致相同,其差異在於雷射光源解偏器100c的雙折射晶體130c由兩個楔形的雙折射材料136、138構成。雙折射材料136、138互相配合,使雷射光L2進一步形成光程差,並且使雷射光L2在穿透過雙折射晶體130c後的擴散角度θ不變,以破壞雷射光L2的光極化性。雷射光源解偏器100c也可具有匯聚光線的透鏡(圖未示),設置在雙折射晶體130c與積分器140之間,但本揭露並不以此為限。FIG. 5 is a schematic diagram of a laser
綜上所述,本揭露的雷射光源解偏器透過光束角度調整元件降低雷射光的光準直性以增加雷射光的擴散角度,並透過雙折射晶體破壞雷射光的光極化性。接著,透過積分器均勻化雷射光。如此一來,可使得通過積分器後的雷射光適合應用於投影機設備中,例如背投影架構或偏振式的3D眼鏡。因藉由雷射光源解偏器破壞雷射光的光準直性以及光極化性,可提升顯示畫面的均勻度、減少色塊並提高投影畫面的品質。To sum up, the laser light source depolarizer of the present disclosure reduces the optical collimation of the laser light through the beam angle adjustment element to increase the diffusion angle of the laser light, and destroys the optical polarization of the laser light through the birefringent crystal. Next, the laser light is homogenized by an integrator. In this way, the laser light passing through the integrator can be suitable for use in projector equipment, such as rear projection architecture or polarized 3D glasses. Because the optical collimation and optical polarization of the laser light are destroyed by the depolarizer of the laser light source, the uniformity of the display image can be improved, color blocks can be reduced, and the quality of the projected image can be improved.
雖然本發明已以實施方式揭露如上,然其並非用以限定本發明,任何熟習此技藝者,在不脫離本發明之精神和範圍內,當可作各種之更動與潤飾,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。Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Anyone skilled in this art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be defined by the appended patent application scope.
100,100a,100b,100c:雷射光源解偏器
110:雷射光源
120:光束角度調整元件
130:雙折射晶體
140:積分器
150,160:光學膠層
132,134,132a,134a,132b,134b:表面
136,138:雙折射材料
200:投影系統
300:薄型屏幕
302:觀看面
304:投影面
400:觀看者
L1,L2,L3,L4:雷射光
D1:第一方向
θ:擴散角度
100, 100a, 100b, 100c: laser light source depolarizer
110: Laser light source
120: beam angle adjustment element
130: birefringent crystal
140: Integrator
150,160: optical
第1圖為根據本揭露一實施例之雷射光源解偏器的示意圖。 第2圖為第1圖之雷射光源解偏器應用於投影機設備中的示意圖。 第3圖為根據本揭露另一實施例之雷射光源解偏器的示意圖。 第4圖為根據本揭露另一實施例之雷射光源解偏器的示意圖。 第5圖為根據本揭露另一實施例之雷射光源共軸設備的示意圖。 FIG. 1 is a schematic diagram of a laser light source depolarizer according to an embodiment of the present disclosure. Figure 2 is a schematic diagram of the application of the laser light source depolarizer in Figure 1 to a projector device. FIG. 3 is a schematic diagram of a laser light source depolarizer according to another embodiment of the present disclosure. FIG. 4 is a schematic diagram of a laser light source depolarizer according to another embodiment of the present disclosure. FIG. 5 is a schematic diagram of a laser light source coaxial device according to another embodiment of the present disclosure.
100:雷射光源解偏器 100:Laser light source depolarizer
110:雷射光源 110: Laser light source
120:光束角度調整元件 120: beam angle adjustment element
130:雙折射晶體 130: birefringent crystal
140:積分器 140: Integrator
132,134:表面 132,134: surface
L1,L2,L3,L4:雷射光 L1, L2, L3, L4: laser light
D1:第一方向 D1: the first direction
θ:擴散角度 θ: Diffusion angle
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TW110118818A TW202246852A (en) | 2021-05-25 | 2021-05-25 | Laser light source depolarizer and projection device having the same |
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TW (1) | TW202246852A (en) |
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2021
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