TWI698697B

TWI698697B - Projector structure

Info

Publication number: TWI698697B
Application number: TW105125664A
Authority: TW
Inventors: 邱延誠
Original assignee: 香港商香港彩億科技有限公司
Priority date: 2016-08-11
Filing date: 2016-08-11
Publication date: 2020-07-11
Also published as: TW201805712A

Abstract

The present invention relates to a projector structure, characterized in that it includes: a light module for emitting a first type of polarized light and a second type of polarized light; a polarized light converter for receiving and converting a portion of the second type of polarized light to the first type of polarized light to be emitted; a polarizer module including a polarizer film, a first transparent rigid substrate and a second transparent rigid substrate wherein the polarizer film is located between the first transparent rigid substrate and the second transparent rigid substrate, and the polarizer module is located on light paths of the first type of polarized light and the second type of polarized light emitted by the polarized light converter to guide the first type of polarized light along a first light path and guide the second type of polarized light along a second light path; a polarization beam splitter for receiving the first type of polarized light on the first light path and guiding it along a third light path; a liquid crystal on silicon module for receiving, modulating, reflecting and converting the first type of polarized light on the third path to from the second type of polarized light carrying images which passes the polarization beam splitter; and an imaging lens set for receiving the second type of polarized light passing the polarization beam splitter for focus imaging.

Description

投影機結構Projector structure

本發明涉及投影機結構，尤指可隨身攜帶的投影機結構。The invention relates to a projector structure, in particular to a projector structure that can be carried around.

由筆記本電腦發展到智慧型手機，可攜式資訊處理裝置的體積日益縮小，連帶著顯示器的尺寸也隨之縮小。但是，過小的顯示器不適合進行簡報，於是，利用投影機來顯示簡報畫面便是這類場合常用的解決方案。不過，現有的投影機體積過大、重量過重而不易攜帶。於是有設計人員將投影機縮小化、輕量化而形成一微型投影機，甚至整合到智慧型手機或是其他便攜設備上。From notebook computers to smart phones, the size of portable information processing devices is shrinking, and the size of the display is also shrinking. However, a display that is too small is not suitable for presentations, so using a projector to display the presentation screen is a common solution for such occasions. However, the existing projectors are too large and heavy to carry. Therefore, some designers have reduced the size and weight of the projector to form a miniature projector, and even integrated it into a smart phone or other portable devices.

而微型投影機中最為關鍵的元件為光學引擎核心以及照明光源。至於光學引擎核心則主要分成兩種技術，一種技術是數位光源處理（Digital　Light　Process，以下簡稱DLP），另一種技術是矽基液晶（Liquid　Crystal　on　Silicon，以下簡稱LCoS）。目前兩種微型投影技術均採用發光二極體（LED）作為照明光源。其中，若是以單晶片所完成的DLP技術，其成像的色彩表現上還無法和LCoS的投影技術相抗衡。而若是以三晶片所完成的DLP技術，雖然可以避免單晶片產品上色彩表現力不足的缺陷，但其成本高昂且體積較不易縮小，因此不易完成於微型投影機中。而且，由於微電子機械結構的限制，使得DLP技術的開口率以及解析度提升困難，更是DLP投影技術的很大弱點。The most critical components in a micro projector are the core of the optical engine and the lighting source. As for the core of the optical engine, it is mainly divided into two technologies. One technology is digital light source processing (Digital　Light　Process, hereinafter referred to as DLP), and the other technology is Liquid 　Crystal　on　Silicon (hereinafter referred to as LCoS). At present, both micro-projection technologies use light-emitting diodes (LED) as the illumination source. Among them, if the DLP technology is completed with a single chip, the color performance of its imaging cannot compete with the projection technology of LCoS. If the DLP technology is completed with three chips, although it can avoid the defect of insufficient color expression on a single chip product, its cost is high and the size is relatively difficult to shrink, so it is not easy to complete in a micro projector. Moreover, due to the limitation of the microelectronic mechanical structure, it is difficult to improve the aperture ratio and resolution of the DLP technology, which is a big weakness of the DLP projection technology.

因此，採用LCoS投影技術來完成微型投影機已逐漸成為主流，但是，利用液晶與偏極光特性來改變光線輸出比例的LCoS投影技術，必然有一部份的光線將耗損在處理的過程中，造成LCoS投影技術的發光效率不彰，這在重視耗能的可攜式裝置上，將是一個需要優先解決的問題。而先前針對此一課題所發展出來的技術手段有公告556039號台灣專利以及證書號TW I480663號台灣專利。但其中略有提到利用反射偏光器來完成相關光路，但未能更深入地對於如何有效地整合進光路結構中，用以提高產品良率以及光的回收效率。而如何改善此等缺失，進而有效提昇微型投影機的性能表現，係為發展本案之主要目的。Therefore, the use of LCoS projection technology to complete the miniature projector has gradually become the mainstream. However, the LCoS projection technology that uses the characteristics of liquid crystal and polarized aurora to change the ratio of light output will inevitably have a part of the light consumed in the process of processing, resulting in LCoS The poor luminous efficiency of projection technology will be a priority problem for portable devices that focus on energy consumption. The technical means previously developed for this subject are Taiwan Patent Publication No. 556039 and Taiwan Patent No. TW I480663. However, there is a slight mention of using a reflective polarizer to complete the related optical path, but there is no deeper understanding of how to effectively integrate it into the optical path structure to improve product yield and light recovery efficiency. How to improve these shortcomings and effectively improve the performance of the micro projector is the main purpose of the development of this case.

因此，本發明一方面主要是提供一種投影機結構，其特徵在於包含有：光源模組，用以發出一第一偏振類型光與一第二偏振類型光，該第一偏振類型光的偏振方向與該第二偏振類型光的偏振方向為正交；偏振光轉換器，接收該第一偏振類型光與該第二偏振類型光，將接收到部份之該第二偏振類型光轉換成該第一偏振類型光後送出；偏振片，位於該偏振光轉換器送出該第一偏振類型光與該第二偏振類型光的傳遞路徑上，用以讓該第一偏振類型光沿一第一路徑前進，而讓該第二偏振類型光向一第二路徑前進；偏光分離稜鏡，該偏振片貼附於該偏光分離稜鏡之一入射面，用以接收沿該第一路徑上的該第一偏振類型光並導向一第三路徑；矽基液晶模組，接收沿該第三路徑上的該第一偏振類型光並進行調變且經反射轉成載有影像的該第二偏振類型光後穿透該偏光分離稜鏡；以及成像透鏡組，接收穿透該偏光分離稜鏡的該第二偏振類型光而聚焦成像。Therefore, one aspect of the present invention is mainly to provide a projector structure, which is characterized by comprising: a light source module for emitting a first polarization type light and a second polarization type light, the polarization direction of the first polarization type light The polarization direction of the second polarization type light is orthogonal; the polarization converter receives the first polarization type light and the second polarization type light, and converts the received part of the second polarization type light into the first polarization type light A polarization type light is sent out; a polarizer is located on the transmission path through which the polarization converter sends the first polarization type light and the second polarization type light, so as to allow the first polarization type light to travel along a first path , And let the second polarization type light go to a second path; polarization separation beam, the polarizer is attached to an incident surface of the polarization separation beam, for receiving the first path along the first path The polarization type light is guided to a third path; the silicon-based liquid crystal module receives the first polarization type light along the third path, modulates it, and is reflected and converted into the second polarization type light carrying an image Penetrating the polarized light separation beam; and an imaging lens group, receiving the second polarization type light penetrating the polarization separation beam, and focusing and imaging.

根據上述設計，本發明實施例的投影機結構，其特徵在於該第一偏振類型光為S偏振光與該第二偏振類型光為P偏振光，且更包含一陣列透鏡，位於該光源模組與該偏振光轉換器之間，接收該光源模組所發出之該S偏振光與該P偏振光並輸出均勻化之該S偏振光與該P偏振光，該陣列透鏡之表面上形成有一鍍膜，用以增加穿透率，讓向該第二路徑前進之該P偏振光反射回該偏振光轉換器的效率增加。According to the above design, the projector structure of the embodiment of the present invention is characterized in that the first polarization type light is S-polarized light and the second polarization type light is P-polarized light, and it further includes an array lens located in the light source module. Between the polarization converter and the polarization converter, receiving the S-polarized light and the P-polarized light emitted by the light source module and outputting the uniformized S-polarized light and the P-polarized light, and a coating is formed on the surface of the array lens , To increase the transmittance, so that the P-polarized light traveling toward the second path reflects back to the polarization converter.

根據上述設計，本發明實施例的投影機結構，其特徵在於該鍍膜為一抗反射層。According to the above design, the projector structure of the embodiment of the present invention is characterized in that the coating is an anti-reflection layer.

本發明之另一方面係為一種投影機結構，其特徵在於包含有：光源模組，用以發出一第一偏振類型光與一第二偏振類型光，該第一偏振類型光的偏振方向與該第二偏振類型光的偏振方向為正交；偏振光轉換器，接收該第一偏振類型光與該第二偏振類型光，將接收到部份之該第二偏振類型光轉換成該第一偏振類型光後送出；偏振片模組，其中包含有一偏振片膜片與一第一透明硬基板與一第二透明硬基板，該偏振片膜片被該第一透明硬基板與該第二透明硬基板固定於其間，該偏振片模組設於該偏振光轉換器送出該第一偏振類型光與該第二偏振類型光的傳遞路徑上，用以讓該第一偏振類型光沿一第一路徑前進，而讓該第二偏振類型光向一第二路徑前進；偏光分離稜鏡，該偏振片模組位於該偏光分離稜鏡之一入射面之前，該偏光分離稜鏡用以接收沿該第一路徑上的該第一偏振類型光並導向一第三路徑；矽基液晶模組，接收沿該第三路徑上的該第一偏振類型光並進行調變且經反射轉成載有影像的該第二偏振類型光後穿透該偏光分離稜鏡；以及成像透鏡組，接收穿透該偏光分離稜鏡的該第二偏振類型光而聚焦成像。Another aspect of the present invention is a projector structure, which is characterized by comprising: a light source module for emitting a first polarization type light and a second polarization type light, the polarization direction of the first polarization type light and The polarization direction of the second polarization type light is orthogonal; the polarization converter receives the first polarization type light and the second polarization type light, and converts the received part of the second polarization type light into the first polarization type light. The polarized light is sent out; the polarizer module includes a polarizer film, a first transparent hard substrate, and a second transparent hard substrate. The polarizer film is covered by the first transparent hard substrate and the second transparent The rigid substrate is fixed between them, and the polarizer module is arranged on the transmission path of the polarization converter to send the first polarization type light and the second polarization type light, so as to allow the first polarization type light to follow a first polarization type light. The path advances, and the second polarization type light advances to a second path; the polarized light separation beam, the polarizer module is located in front of an incident surface of the polarization separation beam, and the polarization separation beam is used to receive along the The first polarization type light on the first path is guided to a third path; the silicon-based liquid crystal module receives the first polarization type light along the third path, modulates it, and is reflected and converted into an image bearing After the second polarization type light penetrates the polarized light separation beam; and the imaging lens group receives the second polarization type light that penetrates the polarized light separation beam to focus and image.

根據上述設計，本發明實施例的投影機結構，其特徵在於該第一透明硬基板與該第二透明硬基板中任一基板是鍍有抗反射層的玻璃基板。According to the above design, the projector structure of the embodiment of the present invention is characterized in that any one of the first transparent hard substrate and the second transparent hard substrate is a glass substrate coated with an anti-reflection layer.

根據上述設計，本發明實施例的投影機結構，其特徵在於該偏振片模組緊貼於該偏振光轉換器的表面，用以縮短該第二偏振類型光的返回路徑而增加光回收率。According to the above design, the projector structure of the embodiment of the present invention is characterized in that the polarizer module is tightly attached to the surface of the polarization converter to shorten the return path of the second polarization type light and increase the light recovery rate.

由上可知，本發明可以改善光源的利用效率，進而改善微型投影機的能源利用效率，而且非常適用於小型化的可攜式電子裝置中，進而達到改善現有技術的效果。It can be seen from the above that the present invention can improve the utilization efficiency of the light source, thereby improving the energy utilization efficiency of the micro projector, and is very suitable for miniaturized portable electronic devices, thereby achieving the effect of improving the prior art.

可以實現本發明特徵與優點的一些典型實施例將在後續的說明中詳細敍述。應理解的是本發明能夠在不同的態樣上具有各種的變化，其皆不脫離本發明技術方案範圍，且其中的說明及附圖在本質上是當作說明之用，而非用以限制本發明。Some typical embodiments that can realize the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different aspects, all of which do not depart from the scope of the technical solution of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes, rather than limiting this invention.

請參見圖1，其為本發明所提出來的微投影機光路結構示意圖，其中光源模組10係為可發出混合有紅綠藍三原色(本例由三色發光二極體(LED)光源所產生)之非單一偏振光，意即為常見可發出混合有”P偏振光”和”S偏振光”兩種偏振類型光的光源。”P偏振光”和”S偏振光”透過陣列透鏡11的處理，使光線及能量得以均勻化後，便送到偏振光轉換器( Polarization Conversion System，簡稱PCS)12來進行轉換，用以將原本混合有P偏振光和S偏振光的光線，盡量轉換成單一偏振光(本案皆以轉換成S偏振光為例進行說明)後於一傳遞路徑上傳送出去。而偏振光轉換器12輸出之光線經過聚光透鏡(Condenser len)13聚光後，再送入偏光分離稜鏡(Polarization Beam. Splitting Prism， PBS)14進行處理。Please refer to Figure 1, which is a schematic diagram of the optical path structure of the micro-projector proposed by the present invention, in which the light source module 10 is capable of emitting a mixture of red, green and blue three primary colors (in this example, a three-color light-emitting diode (LED) light source) The non-single polarized light produced) means a common light source that can emit light with two polarization types mixed with "P-polarized light" and "S-polarized light". "P-polarized light" and "S-polarized light" are processed by the array lens 11 to homogenize the light and energy, and then sent to the Polarization Conversion System (PCS) 12 for conversion, The light originally mixed with P-polarized light and S-polarized light is converted into a single polarized light as much as possible (in this case, the conversion into S-polarized light is used as an example) and then transmitted on a transmission path. The light output from the polarization converter 12 is collected by a condenser lens (Condenser len) 13, and then sent to a Polarization Beam. Splitting Prism (PBS) 14 for processing.

但為求光線偏振的單一化，本案係於該偏光分離稜鏡14之入射面140之前設有偏振片149，此偏振片149係以反射式偏振片來完成，用以讓該第一偏振類型光沿一第一路徑前進，而讓該第二偏振類型光朝向反射的第二路徑前進。而在本例中，第一偏振類型光與該第二偏振類型光便是上述之S偏振光和P偏振光。由於反射式的偏振片149可以把未能穿透的光線反射至該第二路徑(本例為反方向)而不是吸收，因此可以透過回收的機制再把未能穿透的光線再次導向正確的路徑上。如此一來，本案將可以改善發光效率不彰的習用缺失。However, in order to simplify the polarization of the light, in this case, a polarizer 149 is provided before the incident surface 140 of the polarized light separation beam 14. This polarizer 149 is completed by a reflective polarizer to allow the first polarization type The light travels along a first path, and the second polarization type light travels toward the reflected second path. In this example, the first polarization type light and the second polarization type light are the above-mentioned S-polarized light and P-polarized light. Since the reflective polarizer 149 can reflect the unpenetrated light to the second path (in this case, the opposite direction) instead of absorbing it, it can redirect the unpenetrated light to the correct direction through the recycling mechanism. On the path. In this way, this case will be able to improve the conventional lack of luminous efficiency.

另外，反射式的偏振片149因為材質通常不耐高溫，所以本案特別將此一裝置設置於遠離會產生高熱的光源(本例為三色發光二極體(LED)光源)的位置，本圖的實例是將其貼附於偏光分離稜鏡14之入射面140上，不但可以提供反射式的偏振片149所需要的支撐強度，還可以避免高溫所導致的材料變質或是產生翹曲。In addition, because the material of the reflective polarizer 149 is generally not high temperature resistant, the device is particularly placed away from the light source that generates high heat (in this case, a three-color light-emitting diode (LED) light source). An example of this is to attach it to the incident surface 140 of the polarized light splitting beam 14, which not only provides the supporting strength required by the reflective polarizer 149, but also prevents material deterioration or warping caused by high temperature.

至於偏光分離稜鏡14用以接收沿該第一路徑(透射過偏振片149)上的該第一偏振類型光(本例為S偏振光)並導向一第三路徑(圖中是被反射至右邊)，包含有相位延遲片(retarder)150的矽基液晶模組15則是接收沿該第三路徑上的該第一偏振類型光(本例是S偏振光)並進行調變且經反射轉成載有影像的該第二偏振類型光(本例是P偏振光)後穿透該偏光分離稜鏡14後送至成像透鏡組16，成像透鏡組16接收穿透該偏光分離稜鏡的該第二偏振類型光(本例是P偏振光)而聚焦成像。As for the polarization separation beam 14 to receive the first polarization type light (S-polarized light in this example) along the first path (transmitted through the polarizer 149) and guide it to a third path (in the figure it is reflected to On the right), the silicon-based liquid crystal module 15 including a retarder 150 receives the first polarization type light (S-polarized light in this example) along the third path, modulates the light and reflects it The second polarization type light (P-polarized light in this example) carrying an image is converted into the polarized light splitting beam 14 and then sent to the imaging lens group 16, and the imaging lens group 16 receives the polarized light splitting beam. The second polarization type light (P-polarized light in this example) is focused and imaged.

再請參見圖2，其係上述反射式的偏振片149的另一較佳實施例示意圖，其主要是引入一偏振片模組20來取代圖1中反射式的偏振片149。偏振片模組20中包含有一偏振片膜片200與一第一透明硬基板201與一第二透明硬基板202，該偏振片膜片200被該第一透明硬基板201與該第二透明硬基板202固定於其間，該偏振片模組20設於該偏振光轉換器12送出該第一偏振類型光與該第二偏振類型光的傳遞路徑上，用以讓該第一偏振類型光沿第一路徑前進，而讓該第二偏振類型光向第二路徑前進。而在本例中，第一偏振類型光與該第二偏振類型光便是上述之S偏振光和P偏振光。由於反射式的偏振片模組20可以把未能穿透的光線反射至該第二路徑(本例為圖中的向左方向)而不是吸收，因此本例的回收機制可以將沿第二路徑返回到偏振光轉換器12的P偏振光，透過偏振光轉換器12與陣列透鏡11的光路設計而將反射回收的P偏振光再轉換成把未能穿透的光線再次導向正確的路徑上。同樣地，該偏振片模組20也可緊貼於該偏振光轉換器12的表面，用以縮短該第二偏振類型光的返回路徑而增加光回收率。Please refer to FIG. 2 again, which is a schematic diagram of another preferred embodiment of the above-mentioned reflective polarizer 149, which mainly introduces a polarizer module 20 to replace the reflective polarizer 149 in FIG. The polarizer module 20 includes a polarizer film 200, a first transparent rigid substrate 201, and a second transparent rigid substrate 202. The polarizer film 200 is covered by the first transparent rigid substrate 201 and the second transparent rigid substrate. The substrate 202 is fixed therebetween, and the polarizer module 20 is arranged on the transmission path of the polarization converter 12 for sending the first polarization type light and the second polarization type light to allow the first polarization type light to follow the first polarization type light. One path travels, and the second polarization type light travels to the second path. In this example, the first polarization type light and the second polarization type light are the above-mentioned S-polarized light and P-polarized light. Since the reflective polarizer module 20 can reflect the unpenetrated light to the second path (in this example, the left direction in the figure) instead of absorbing it, the recycling mechanism in this example can follow the second path The P-polarized light returned to the polarization converter 12 passes through the optical path design of the polarization converter 12 and the array lens 11 to convert the reflected and recovered P-polarized light into the light that has not penetrated and redirect it to the correct path. Similarly, the polarizer module 20 can also be closely attached to the surface of the polarization converter 12 to shorten the return path of the second polarization type light and increase the light recovery rate.

詳言之，如圖所示，由於偏振光轉換器12主要包含有數條帶狀的偏振分光鏡(PBS Array)122、相位延遲片(retarder)123以及相位延遲片(retarder) (Retarder)123之間的透光區124，透光區124與偏振分光鏡122可以讓反射回去的P偏振光通過而到達後方的陣列透鏡11，再由陣列透鏡11與其它可能的反射面來將其反射而能再通過偏振光轉換器12一次，進而再將其轉換成S偏振光。如此一來，反射回來的P偏振光將可以有效回收利用而轉變成S偏振光，進而增加光源的利用率。而該鍍膜110可以是一抗反射層，陣列透鏡11的材質可以利用玻璃來完成。鍍膜110的位置可以是在兩面都有鍍膜，用以增加穿透率,提高光效率。In detail, as shown in the figure, since the polarization converter 12 mainly includes several strip-shaped polarization beam splitters (PBS Array) 122, a phase retarder (retarder) 123, and a phase retarder (Retarder) 123. The light-transmitting area 124, the light-transmitting area 124, and the polarizing beam splitter 122 can let the reflected P-polarized light pass through and reach the rear array lens 11, and then the array lens 11 and other possible reflecting surfaces can reflect it. It passes through the polarization converter 12 again, and then converts it into S-polarized light. In this way, the reflected P-polarized light can be effectively recycled and converted into S-polarized light, thereby increasing the utilization rate of the light source. The coating 110 may be an anti-reflection layer, and the material of the array lens 11 may be made of glass. The position of the coating film 110 can be coated on both sides to increase the transmittance and improve the light efficiency.

如此一來，本案將可以改善發光效率不彰的習用缺失。而該兩片透明硬基板可以是鍍有抗反射層的玻璃基板。如此一來，偏振片膜片200不需貼附在偏光分離稜鏡14上就具有自身的強度而可以維持組裝的精確度。而鍍有抗反射層的玻璃基板則可以有效提高透光率而讓光利用率可以提高。In this way, this case will be able to improve the conventional lack of luminous efficiency. The two transparent hard substrates can be glass substrates coated with an anti-reflection layer. In this way, the polarizer film 200 does not need to be attached to the polarized light separation beam 14 to have its own strength and maintain the accuracy of assembly. The glass substrate coated with an anti-reflection layer can effectively increase the light transmittance and increase the light utilization rate.

綜上所述，本發明實施例的硬體架構可運用於各式投影機系統中，並可以有效提高系統的光利用率，進而達到改善現有技術的效果。但以上所述，僅是本發明的較佳實施例而已，並非對本發明作任何形式上的限制，雖然本發明已以較佳實施例揭露如上，然而並非用以限定本發明，任何熟悉本專業的技術人員，在不脫離本發明技術方案範圍內,當可利用上述揭示的技術內容作出些許更動或修飾為等同變化的等效實施例，但凡是未脫離本發明技術方案內容，依據本發明的技術實質對以上實施例所作的任何簡單修改、等同變化與修飾，均仍屬於本發明技術方案的範圍內。In summary, the hardware architecture of the embodiment of the present invention can be applied to various projector systems, and can effectively improve the light utilization rate of the system, thereby achieving the effect of improving the prior art. However, the above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention. Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make slight changes or modifications into equivalent embodiments with equivalent changes, but those who do not depart from the technical solution of the present invention are based on the present invention Technical essence Any simple modification, equivalent change and modification made to the above embodiments still fall within the scope of the technical solution of the present invention.

10‧‧‧光源模組 11‧‧‧陣列透鏡 P、S‧‧‧偏振光 12‧‧‧偏振光轉換器 13‧‧‧聚光透鏡 14‧‧‧偏光分離稜鏡 140‧‧‧入射面 149‧‧‧偏振片 150‧‧‧相位延遲片 15‧‧‧矽基液晶模組 16‧‧‧成像透鏡組 20‧‧‧偏振片模組 200‧‧‧偏振片膜片 201‧‧‧第一透明硬基板 202‧‧‧第二透明硬基板 122‧‧‧偏振分光鏡 123‧‧‧相位延遲片 124‧‧‧透光區 110‧‧‧鍍膜10‧‧‧Light source module 11‧‧‧Array lens P, S‧‧‧Polarized light 12‧‧‧Polarization converter 13‧‧‧Condenser lens 14‧‧‧ Polarized light separation beam 140‧‧‧ incident surface 149‧‧‧Polarizer 150‧‧‧Phase retarder 15‧‧‧Si-based LCD module 16‧‧‧Imaging lens group 20‧‧‧Polarizer Module 200‧‧‧Polarizer film 201‧‧‧First transparent rigid substrate 202‧‧‧Second transparent rigid substrate 122‧‧‧Polarization beam splitter 123‧‧‧Phase retarder 124‧‧‧Transparent area 110‧‧‧Coating

圖1，其為本發明所提出來的微投影機光路結構示意圖。圖2，其係上述反射式的偏振片的另一較佳實施例示意圖。Fig. 1 is a schematic diagram of the optical path structure of the micro-projector proposed by the present invention. Fig. 2 is a schematic diagram of another preferred embodiment of the above-mentioned reflective polarizer.

10‧‧‧光源模組 10‧‧‧Light source module

11‧‧‧陣列透鏡 11‧‧‧Array lens

12‧‧‧偏振光轉換器 12‧‧‧Polarization converter

13‧‧‧聚光透鏡 13‧‧‧Condenser lens

14‧‧‧偏光分離稜鏡 14‧‧‧ Polarized light separation beam

15‧‧‧矽基液晶模組 15‧‧‧Si-based LCD module

16‧‧‧成像透鏡組 16‧‧‧Imaging lens group

140‧‧‧入射面 140‧‧‧ incident surface

149‧‧‧偏振片 149‧‧‧Polarizer

150‧‧‧相位延遲片 150‧‧‧Phase retarder

Claims

一種投影機結構，其特徵在於包含有：一光源模組，用以發出一第一偏振類型光與一第二偏振類型光，該第一偏振類型光的偏振方向與該第二偏振類型光的偏振方向為正交；一偏振光轉換器，接收該第一偏振類型光與該第二偏振類型光，將接收到部份之該第二偏振類型光轉換成該第一偏振類型光後送出；一偏振片，位於該偏振光轉換器送出該第一偏振類型光與該第二偏振類型光的傳遞路徑上，用以讓該第一偏振類型光沿一第一路徑前進，而讓該第二偏振類型光向一第二路徑前進；一偏光分離稜鏡，該偏振片貼附於該偏光分離稜鏡之一入射面，用以接收沿該第一路徑上的該第一偏振類型光並導向一第三路徑；一矽基液晶模組，接收沿該第三路徑上的該第一偏振類型光並進行調變且經反射轉成載有影像的該第二偏振類型光後穿透該偏光分離稜鏡；以及一成像透鏡組，接收穿透該偏光分離稜鏡的該第二偏振類型光而聚焦成像。A projector structure is characterized by comprising: a light source module for emitting a first polarization type light and a second polarization type light, the polarization direction of the first polarization type light and the second polarization type light The polarization direction is orthogonal; a polarization converter, which receives the first polarization type light and the second polarization type light, converts a portion of the received second polarization type light into the first polarization type light and sends it out; A polarizer is located on the transmission path of the first polarization type light and the second polarization type light sent by the polarization converter, and is used to allow the first polarization type light to travel along a first path and let the second polarization type light travel along a first path. The polarization type light travels to a second path; a polarization separation beam, the polarizer is attached to an incident surface of the polarization separation beam, for receiving and guiding the first polarization type light along the first path A third path; a silicon-based liquid crystal module that receives the first polarization type light along the third path, modulates it, and is reflected and converted into the second polarization type light carrying an image and then penetrates the polarized light Separation beam; and an imaging lens group, which receives the second polarization type light penetrating the polarized light separation beam to focus imaging.

如申請專利範圍第1項所述之投影機結構，其特徵在於該第一偏振類型光為S偏振光與該第二偏振類型光為P偏振光，且更包含一陣列透鏡，位於該光源模組與該偏振光轉換器之間，接收該光源模組所發出之該S偏振光與該P偏振光並輸出均勻化之該S偏振光與該P偏振光，該陣列透鏡之表面上形成有一鍍膜，用以增加穿透率，讓向該第二路徑前進之該P偏振光反射回該偏振光轉換器的效率增加。The projector structure described in item 1 of the patent application is characterized in that the first polarization type light is S-polarized light and the second polarization type light is P-polarized light, and further includes an array lens located in the light source mode. Between the group and the polarization converter, receiving the S-polarized light and the P-polarized light emitted by the light source module and outputting the uniformized S-polarized light and the P-polarized light, and a surface of the array lens is formed The coating is used to increase the transmittance and increase the efficiency of reflecting the P-polarized light traveling toward the second path back to the polarization converter.

如申請專利範圍第2項所述之投影機結構，其特徵在於該鍍膜為一抗反射層。The projector structure described in item 2 of the scope of patent application is characterized in that the coating is an anti-reflection layer.

一種投影機結構，其特徵在於包含有：一光源模組，用以發出一第一偏振類型光與一第二偏振類型光，該第一偏振類型光的偏振方向與該第二偏振類型光的偏振方向為正交；一偏振光轉換器，接收該第一偏振類型光與該第二偏振類型光，將接收到部份之該第二偏振類型光轉換成該第一偏振類型光後送出；一偏振片模組，其中包含有一偏振片膜片與一第一透明硬基板與一第二透明硬基板，該偏振片膜片被該第一透明硬基板與該第二透明硬基板固定於其間，該偏振片模組設於該偏振光轉換器送出該第一偏振類型光與該第二偏振類型光的傳遞路徑上，用以讓該第一偏振類型光沿一第一路徑前進，而讓該第二偏振類型光向一第二路徑前進；一偏光分離稜鏡，該偏振片模組位於該偏光分離稜鏡之一入射面之前，該偏光分離稜鏡用以接收沿該第一路徑上的該第一偏振類型光並導向一第三路徑；一矽基液晶模組，接收沿該第三路徑上的該第一偏振類型光並進行調變且經反射轉成載有影像的該第二偏振類型光後穿透該偏光分離稜鏡；以及一成像透鏡組，接收穿透該偏光分離稜鏡的該第二偏振類型光而聚焦成像。A projector structure is characterized by comprising: a light source module for emitting a first polarization type light and a second polarization type light, the polarization direction of the first polarization type light and the second polarization type light The polarization direction is orthogonal; a polarization converter, which receives the first polarization type light and the second polarization type light, converts a portion of the received second polarization type light into the first polarization type light and sends it out; A polarizer module including a polarizer film, a first transparent hard substrate and a second transparent hard substrate, the polarizer film is fixed between the first transparent hard substrate and the second transparent hard substrate , The polarizer module is arranged on the transmission path of the first polarization type light and the second polarization type light sent by the polarization converter, so as to allow the first polarization type light to proceed along a first path, and The second polarization type light travels to a second path; a polarized light separation beam, the polarizer module is located in front of an incident surface of the polarization separation beam, and the polarization separation beam is used for receiving along the first path The first polarization type light is directed to a third path; a silicon-based liquid crystal module receives the first polarization type light along the third path, modulates it, and is reflected and converted into the second image-carrying After the two-polarization type light penetrates the polarized light separation beam; and an imaging lens group receives the second polarization type light that has penetrated the polarized light separation beam to focus and image.

如申請專利範圍第4項所述之投影機結構，其特徵在於該第一偏振類型光為S偏振光與該第二偏振類型光為P偏振光，且更包含一陣列透鏡，位於該光源模組與該偏振光轉換器之間，接收該光源模組所發出之該S偏振光與該P偏振光並輸出均勻化之該S偏振光與該P偏振光，該陣列透鏡之表面上形成有一鍍膜，用以增加穿透率，讓向該第二路徑前進之該P偏振光反射回該偏振光轉換器的效率增加。The projector structure described in item 4 of the scope of patent application is characterized in that the first polarization type light is S-polarized light and the second polarization type light is P-polarized light, and further includes an array lens located in the light source mode. Between the group and the polarization converter, receiving the S-polarized light and the P-polarized light emitted by the light source module and outputting the uniformized S-polarized light and the P-polarized light, and a surface of the array lens is formed The coating is used to increase the transmittance and increase the efficiency of reflecting the P-polarized light traveling toward the second path back to the polarization converter.

如申請專利範圍第5項所述之投影機結構，其特徵在於該鍍膜為一抗反射層。As described in item 5 of the scope of patent application, the projector structure is characterized in that the coating is an anti-reflection layer.

如申請專利範圍第4項所述之投影機結構，其特徵在於該第一透明硬基板與該第二透明硬基板中任一基板是鍍有抗反射層的玻璃基板。The projector structure described in item 4 of the scope of patent application is characterized in that any one of the first transparent hard substrate and the second transparent hard substrate is a glass substrate coated with an anti-reflection layer.

如申請專利範圍第4項所述之投影機結構，其特徵在於該偏振片模組緊貼於該偏振光轉換器的表面，用以縮短該第二偏振類型光的返回路徑而增加光回收率。The projector structure described in item 4 of the scope of patent application is characterized in that the polarizer module is closely attached to the surface of the polarization converter to shorten the return path of the second polarization type light and increase the light recovery rate .