200839288 九、發明說明： 【發明所屬之技術領域】 本發明涉及頭戴式顯示裝置，特別涉及能夠進行立體 圖像顯示的頭戴式顯示裝置光路結構。 【先前技術】 隨著電子技術的發展，近年來可攜式遊戲設備得到了 很大發展，Xbox、Play Station等系列的遊戲機在存儲以及 計算處理能力等方面已經可以應付複雜大型遊戲的需求。 但是，出於便攜性方面的考慮，這些遊戲設備在顯示方面 還略顯不足。雖然它們的解析度已經可以與普通的桌上型 電腦顯示器媲美，但是由於設備整體尺寸的限制，其螢幕 (通常是液晶顯示幕）不可能有很大的物理尺寸，因此顯 示效果仍然有限。 為了克服上述缺點，一種解決方案是不使用（或有選 擇地在某些情況下不使用）尺寸有限的液晶顯示器，而給 遊戲設備配備微型投影裝置，將本來要顯示在螢幕上的内 容投影到遊戲者面對的外部，例如房間内壁、機艙内壁或 車輛内壁等，從而可以克服顯示螢幕大小方面的缺陷。 但是，在某些情況下，上述解決方案也會造成麻煩。 例如，在機艙或車輛中，如果有多人同時使用上述投射式 遊戲設備，則多台設備投影出的圖像可能互相重疊和干 擾。另外，由於所投影出的内容可以被多人同時看到，所 以在顯示内容涉及個人隱私的情況下是不適於使用的。 200839288 另外’二維的平面圖像顯示也已經越來越難以滿足人 們的要求，人們已經開始追求三維立體顯示效果。對此， 現有可攜式電子設備的顯示裝置就愈顯不足。 【發明内容】 f i 本發明的目的在於提供一種頭戴式顯示裝置，它結構 η保持高度便攜性的同時，可錢顯*資訊保持一 =:=性：還能夠進行立體顯示，從而提高可攜式遊戲 石又備的顯不性能。 和第本式:示|置包括光源、第-光調製裝置 先術置，其中’第—光調製裝置以第一 =源::的一部分光進行調製，第二光調製㈣不 光進㈣i找的第二調製資訊對光源發射的另一部分 °。、，纪兩部分光經過調製後沿著互不重合的路;^ 傳播，使頭戴式顧+壯罢_ 令卜里口的路徑 本發明的頭戴；：為佩戴者提供立體顯示。 -個光源中的兩個單獨輸：j兩似可以來自 出的兩種正交偏元件從一個光源發出的光中分 光棱鏡組，其t可；偏振分光71件可以使用偏振分 括波片等偏振態轉換^件右干個偏振分光棱鏡，還可以包 傳播沿著互不重合_ 也可，，顯示裝置外看::::者 200839288 手持的書本或觀看者外部的爿也 需求。 叫回壁專處，以適應不同的觀看 …戴式顯示裝置，對光進行調製的第 弟一先㈣裝置優選為彩“基液晶α⑶S)元件 它在體積、工蓺、点太、At、広、丨 几件’ 色_晶元_'光功 =rr液晶-嶋上直=二t =而通過在彩—元件的像素上鑛 根據本發明的頭戴式顯示裝置可以與各種可 設備配用，它解決了現有可养 同工电子 兄虿了攜式顯不設備在上述私密性和 立體顯不方面存在的問題’可以實現良好的顯示功能。 .【實施方式】 下面將，圖對本發明的一些示範性實施例進行說 號表示相_元件。纟本明中’相同的標 】曰圖1示出了根據本發明第—實施例的結構示意圖，圖 視示意圖（圖中延—ζ轴方向，即延ζ轴反 向）。弟-貫&例的顯示裝置⑽可以用於與各種可样式 ^設備相連的頭蓋或眼鏡等頭戴式結構中。雖然在:申 晴中以可攜式遊戲設備作為電子設備的例子，但是應當明 白，本發明不僅可以適用於可4崔弋旌 〜田 乎各種有顯示需求的電子㈣幾 而> ν电卞叹備，包括但不限於電子遊戲 200839288 =可=腦、數位相機、數位攝影機，、手 顯示裝置100包括光源（未 ll〇a和第二分光裝置祕構 、纟第一分光裝置 f f置120a、t ^々偏振分光元件、第一光調 衣衣置120a弟—先調製裝置咖 滤光裝置MOa和第二濾光裝 射:置⑽、弟一 以及目鏡祕和⑽b等。圖 ^ * 1術和觸 在頭盔或眼鏡等頭戴式4士構的外扭:、不裝置1〇0可以容納 體結構連接。的外財，或以任何方式與殼 光源（未示出）發射顯示裝置所用的照明光 可以是任何體積小、耗能低的發光元件' 體㈣或LED陣列。光源中還可以包括 進裝置或結構’例如用於濾去紫外線 ㈣回光源的光能進行重新利用的結： 1^= 射的光是非職的，或者包括大致相 同比例的兩種正交偏振態。 第-分光裝置⑽和第二分光展置11%是偏振分光 疋可以將進入其中的光分為兩個正交偏振態，優選為 偏振分光棱鏡。也可以採用分紐等其他具 能的 裝置作為第-分光裝置110a和第二分光裝置跡= 以具有相同或相似的類型和尺寸，也可以不同。二者可以 通過適當的機構安裝在賴絲構巾，所較裝結構還可 以具有一定的位置調節功能，以適應佩戴者的觀看需要。 第一分光裝置ll〇a具有輸入面llla、分光面U2a、 200839288BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head mounted display device, and more particularly to an optical path structure of a head mounted display device capable of performing stereoscopic image display. [Prior Art] With the development of electronic technology, portable game devices have been greatly developed in recent years, and game consoles such as Xbox and Play Station have been able to cope with the demands of complex large-scale games in terms of storage and computing processing capabilities. However, due to portability considerations, these gaming devices are still slightly insufficient in display. Although their resolution is comparable to that of a typical desktop computer display, the screen (usually a liquid crystal display) cannot have a large physical size due to the overall size of the device, so the display effect is still limited. In order to overcome the above disadvantages, one solution is to not use (or selectively use, in some cases, not to use) a liquid crystal display of a limited size, and to equip the game device with a micro-projection device to project the content to be displayed on the screen to The exterior facing the player, such as the inner wall of the room, the inner wall of the cabin, or the inner wall of the vehicle, can overcome the defects in the size of the display screen. However, in some cases, the above solution can also cause trouble. For example, in a cabin or a vehicle, if more than one person uses the above-described projection game device at the same time, images projected by a plurality of devices may overlap and interfere with each other. In addition, since the projected content can be seen by many people at the same time, it is unsuitable for use in the case where the display content involves personal privacy. 200839288 In addition, the two-dimensional planar image display has become more and more difficult to meet people's requirements, and people have begun to pursue three-dimensional display effects. In view of this, the display devices of the existing portable electronic devices are increasingly insufficient. SUMMARY OF THE INVENTION The object of the present invention is to provide a head-mounted display device, wherein the structure η maintains high portability, while the information can be maintained*===: can also perform stereoscopic display, thereby improving portability The game game stone is also available for performance. And the first formula: the display includes a light source, and the first light modulation device is first placed, wherein the 'first light modulation device modulates with a part of the light of the first = source::, and the second light modulation (four) does not enter the (four) i The second modulation information is transmitted to another portion of the light source °. The two parts of the light are modulated and then follow the roads that do not coincide with each other; ^ spread, so that the head-wearing type is sturdy. _ The path of the burr mouth. The wearing of the present invention: providing a stereoscopic display for the wearer. Two of the two light sources are separately input: j two can be derived from the two orthogonal polarizing elements from a light source in the light splitting prism group, t can; polarization splitting 71 can use polarization divided wave plates, etc. The polarization state conversion component is right-handed with a polarization beam splitting prism, and can also be spread along the mutual non-coincidence. _ Also, the display device looks outside:::: 200838288 Hand-held books or viewers outside the cymbal are also required. Called back to the wall to adapt to different viewing... Wearable display device, the first (four) device that modulates the light is preferably a color-based liquid crystal α(3)S component. It is in volume, work, point too, At, 広丨 件 ' ' 色 ' rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr rr 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而 而The utility model solves the problem that the existing portable electronic brothers and sisters have the above-mentioned privacy and stereoscopic display in the portable display device, and can realize a good display function. [Embodiment] The following is a view of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Some exemplary embodiments are denoted by the same reference numerals. FIG. 1 is a schematic view showing the structure according to the first embodiment of the present invention. That is, the delay axis is reversed. The display device (10) of the example can be used in a head-mounted structure such as a head cover or glasses connected to various types of devices, although in the case of: Shen Qing, a portable game Equipment as an example of an electronic device, but should Understand that the present invention can be applied not only to 4 Cui Wei ~ Tian Hu various electronic (four) and display ▲ electric sighs, including but not limited to video games 200839288 = can = brain, digital camera, digital camera , the hand display device 100 includes a light source (not 〇 a and second spectroscopic device secret, 纟 first spectroscopic device ff 120a, t ^ 々 polarizing beam splitting element, first light fitting clothes 120a brother - first modulation device The coffee filter device MOa and the second filter are loaded: set (10), brother 1 and eyepiece secret (10) b, etc. Fig. 1 * 1 and the external twist of the head-mounted 4th structure such as helmet or glasses: The external illumination, or the illumination light used to emit the display device in any manner with a shell light source (not shown) may be any small, low energy illuminating element 'body' (four) or LED array The light source may also include a device or structure, such as a junction for filtering out the light energy of the ultraviolet (four) return source: 1^= the emitted light is inactive or includes two orthogonal polarizations of approximately the same ratio State. Splitter (10) The second split light spread is 11%, and the polarized light splitter can split the light entering the light into two orthogonal polarization states, preferably a polarization beam splitting prism. Other energetic devices such as a split beam can also be used as the first light splitting device 110a and The second beam splitter track has the same or similar type and size, and can also be different. Both can be installed on the silk fabric by a suitable mechanism, and the mounted structure can also have a certain position adjustment function to suit the wearing. The need for viewing. The first beam splitting device 11a has an input surface 111a, a beam splitting surface U2a, 200839288
面心、第二輸出面U4a和第三輸出面L '在原的^明光進入輸入面1Ua，並傳播到分光面 112a。在刀光面1123處，照明光中的兩 :開’第-偏振態(用實線表示，例如二^ 被==反^㈣（簡表示，例如S偏振態） 二過β面ma透射的第—偏振態傳播到第一輸出面 113a處。弟一光調製裝置120a設在第—輸出面咖處， 用期望的資訊對傳播到此的光進行調製。本實施例採用了 反射式光路，第-光調製裝置12如可以包括例如梦基液晶 (LCOS) it件、數位式光源處理器（DLp)等，也可以是 液晶光閥，優選切基液晶面板。在娜裝置具有多個= 製兀件，例如CN1570704A所公開的技術，還可以包括相 同或不同種類上述元件的組合。第—光調製裝置中還可以 包括具有偏振態選擇、反射、折料魏的光學結構。瘦 過第一光調製裝置HOa調製的光線，偏振態被轉換成與: 射到該裝置之前的偏振態相互正交，並被反射回分光面 112a。因此，光線在分光面U2a處發生反射，並從第三輸 出面115a出射到第一濾光裝置14〇a。 第一光調製裝置120a中使用的ix〇s面板可以是例如 CN^14447Y中公開的彩色LC〇s裝置，在LC〇s的封裝 玻璃上實現濾光功能（例如彩色濾光片）。不過在頭戴式應 用場合中使用時’通常投射出的功率無需很大，所以彩色 LCOS裝置中用於吸收不需要色彩的濾光片可以直接設在 200839288 像素上也不易被燒壞。當然，也可以在該LCOS上或其附 近設置散熱結構以進一步確保系統的安全性。可以以各種 方式在LC0S中設置濾光片，例如類似於LCD中的處理方 式在像素上直接塗敷各種色彩的染料，或者在像素上鍍干 涉濾光膜來實現濾光功能。 第一光調製裝置120a與信號處理部分（未示出）相 連。信號處理部分可以採用矩陣控制技術，將像素信號輸 送到第一光調製裝置的對應像素處。信號處理部分可以設 在頭戴式顯示裝置中，也可以設在與之相連的可攜式遊戲 設備中。 在第一分光裝置的分光面112a處反射的第二偏振態經 過第二輸出面114a出射，並進入第二分光裝置110b的輸 入面111b。光線接著到達第二分光裝置的分光面112b。分 光面112b使得到達該處的第二偏振態被反射，朝向第二分 光裝置的第一輸出面113b傳播。在本實施例中，光在第二 分光裝置中從分光面112b傳播到第一輸出面113b的路徑 與光在第一分光裝置中從分光面112a傳播到第一輸出面 113a的路徑大致是相互平行和反向的，在第一分光裝置的 分光面112a處反射的s偏振態在第二分光裝置的分光面 112b處仍然會反射而不是透射。 第二光調製裝置120b設在第二分光裝置的第一輸出 面113b處，以期望的資訊對傳播到此的光進行調製。本實 施例採用了反射式光路，第二光調製裝置120b可以包括例 如矽基液晶（LC0S)元件、數位式光源處理器（DLP)等， 10 200839288 也可以是液晶光閥，優選為矽基液晶面板，更優選為與第 一光調製裝置120 a具有相同的型號規格等。在調製裝置具 有多個調製元件，例如CN1570704A所公開的那樣時，還 可以包括相同或不同種類上述元件的組合。第二光調製裝 置中還可以包括具有偏振態選擇、反射、折射等功能的光 學結構。經過第二光調製裝置120b調製的光線被反射回分 光面112b，且其偏振態被轉換成與入射到該裝置之前的偏 振態相互正交。因此，光線在分光面112b處發生透射，並 從第三輸出面115b出射到反射裝置130。 與第一光調製裝置120a類似，第二光調製裝置120b 中使用的LCOS面板也可以是例如CN2514447Y中公開的 彩色LCOS裝置。可以將彩色LCOS裝置中用於吸收不需 要色彩的濾光片直接設在像素上或者設在其封裝玻璃上， 也可以在該LCOS上或其附近設置散熱結構以進一步確保 系統的安全性。同樣可以以各種方式在LCOS中設置濾光 片，例如類似於LCD中的處理方式在像素上直接加染料， 或者在像素上鍍干涉濾光膜。 第二光調製裝置120b也可以採用透射式元件（例如透 射式液晶光閥），此時反射裝置130佈置在第二光調製裝置 的第一輸出面113b以及第二光調製裝置120b之後（圖la 中它們的左侧）。 第二光調製裝置120b也與上述信號處理部分（未示 出）相連。信號處理部分例如可以將像素信號輸送到第二 光調製裝置的對應像素處。信號處理部分可以使第二光調 200839288 製裝置120b以與第一光調製裝置120a不同的圖樣對入射 光進行調製，從而使經過調製的光具有不同的分佈，經過 ^ 調製的光如下所述分別進入觀看者的兩眼，從而使觀看者 可以觀看到立體圖像。 反射裝置130設置成使第二分光裝置110b向其輸出的 光線延著期望的方向傳播並進入第二濾光裝置140b。在本 實施例中，經反射裝置130反射後的光線與從第一分光裝 置110a的第三輸出面115a出射的光線大致平行。但是取 決於應用情況（例如隨觀看者的瞳距大小而調整），這些光 線之間也可以有一定夾角，該夾角通常在0度〜約30度之 間。反射裝置可以是例如相對於光線傳播方向以45度角設 - 置的、鍍有寬頻高反射率膜層的反射鏡，或者各種棱鏡等， 並可以通過適當的機構在頭戴式結構中進行安裝和調節。 第一濾光裝置140a和第二濾光裝置140b可以包括例 如偏振片，它們分別接收從第一分光裝置ll〇a和反射裝置 130輸出的光線，並具有彼此正交的偏振態通過方向，用 於濾去殘餘的不期望偏振態，以改善圖像品質。 經過第一濾光裝置140a和第二濾光裝置140b分別透 射的偏振態可以經過設在二者後方的物鏡15〇a、150b和目 鏡160a、160b進入觀看者的眼腈。本發明的頭戴式顯示裝 置可以包括調節裝置用於對物鏡、目鏡和/或上述顯示結構 的位置以及光源的光強等進行調整，以適應不同觀看者眼 睛的具體需要。物鏡和目鏡以及相應調節裝置的設計可以 採用本領域公知的傳統方法，因此將不在此進行詳細說明。 200839288 本發明的頭戴式顯示裝置中採用的是暗場照明方式， 不需要很強的請可實現高對比度，因此對㈣的要求可 以降低，並且，本實施例中只採用了—個光源以及簡單的 光路即可實現立體顯示，這些都可以減小系統的成本、能 源消耗和體積等。例如，在採用_χ6〇〇解析度的彩色 LCOS面板作為第-和第二光調製裝置的情況下，其大小 通常僅為lcmxlcm左右’即使將第一和第二分光裝置（例 如兩個偏振分光棱鏡）以及反射裝置等的體積計入，也可 以輕鬆地絲在頭戴式結構（例如㈣或㈣的眼鏡等） 中。 圖2示出了根據本發明第二實施例的平面結構示意 圖。該結構大體上與第一實施例的結構相似，區別之處 於’在第二實施例中，不是使觀看者用目鏡160a和160b 直接硯看所投影的内容，而是使從第一分光 振態以及由反射裝置反射的偏振態二者的末段光路 夾角投射到頭戴式顯示聚置之外的某個位置（例如觀 手中的書本，或者觀看者外部的牆壁等），觀看者可 =的觀輕鏡（_於觀看立體電影時所用 硯看立體圖像。 兄^木 晉叮ΪΙ:第二分光裝置以及第一、第二光調製裝置的設 ，置可以有各種靈活的方式，只要使得兩 分別照射到相應的光調製裝置並沿預定方向出； 面以圖3所示情況為例對第―、第二分光裝 此 性不同佈置方式進行朗。為簡單起見，圖3中未;= 13 切二物鏡、a鏡。 進入顯:裝置系下’來自光源的照明光沿+ x方向 、的饰局^The face center, the second output face U4a, and the third output face L' enter the input face 1Ua at the original light and propagate to the spectroscopic surface 112a. At the knife face 1123, two of the illumination light: open 'first-polarization state (represented by a solid line, for example, two ^ ===^(4) (simplified representation, for example, S-polarization state). The first polarization state propagates to the first output surface 113a. The light-modulating device 120a is disposed at the first output face, and modulates the light propagating thereto by using desired information. This embodiment adopts a reflective optical path. The first light modulating device 12 may include, for example, a dream-based liquid crystal (LCOS) device, a digital light source processor (DLp), or the like, or may be a liquid crystal light valve, preferably a chopper-based liquid crystal panel. A device, such as the technology disclosed in CN1570704A, may also include a combination of the above or different types of elements. The first optical modulation device may further include an optical structure having polarization state selection, reflection, and folding. The light modulated by the modulation device HOa, the polarization state is converted into: and the polarization state before the device is orthogonal to each other, and is reflected back to the spectroscopic surface 112a. Therefore, the light is reflected at the spectroscopic surface U2a and is output from the third output. Face 115a is emitted to the first Filter device 14〇a. The ix〇s panel used in the first light modulating device 120a may be a color LC 〇s device disclosed in, for example, CN^14447Y, which implements a filtering function (such as color) on the package glass of the LC 〇s. Filters. However, when used in a head-mounted application, the power normally projected does not need to be large, so the filter used to absorb unwanted colors in a color LCOS device can be directly placed on the 200839288 pixel. Burnout. Of course, a heat dissipation structure can also be provided on or near the LCOS to further ensure the safety of the system. Filters can be placed in the LCOS in various ways, for example, directly on the pixels similar to the processing in the LCD. A coloring dye is applied, or an interference filter film is plated on the pixel to realize a filtering function. The first light modulating device 120a is connected to a signal processing portion (not shown). The signal processing portion may adopt a matrix control technique to convert the pixel signal. Delivered to the corresponding pixel of the first light modulation device. The signal processing portion may be disposed in the head mounted display device or may be disposed in a portable type connected thereto In the gaming device, the second polarization state reflected at the beam splitting surface 112a of the first beam splitting device exits through the second output surface 114a and enters the input surface 111b of the second beam splitting device 110b. The light then reaches the beam splitting surface of the second beam splitting device. 112b. The dichroic surface 112b causes the second polarization state arriving there to be reflected and propagates toward the first output surface 113b of the second spectroscopic device. In the present embodiment, the light propagates from the spectroscopic surface 112b to the second in the second spectroscopic device. The path of an output surface 113b and the path of light propagating from the spectroscopic surface 112a to the first output surface 113a in the first spectroscopic device are substantially parallel and opposite to each other, and the s-polarization reflected at the spectroscopic surface 112a of the first spectroscopic device The state is still reflected rather than transmitted at the beam splitting surface 112b of the second beam splitting device. The second light modulating device 120b is disposed at the first output face 113b of the second beam splitting device to modulate the light propagating thereto with desired information. In this embodiment, a reflective optical path is used, and the second light modulation device 120b may include, for example, a liquid crystal on silicon (LCOS) element, a digital light source processor (DLP), etc., 10 200839288 may also be a liquid crystal light valve, preferably a smuth-based liquid crystal. More preferably, the panel has the same model specifications and the like as the first light modulating device 120a. Where the modulating device has a plurality of modulating elements, such as those disclosed in CN1570704A, combinations of the same or different types of the above elements may also be included. The second light modulating device may further include an optical structure having a function of polarization state selection, reflection, refraction, and the like. The light modulated by the second light modulating device 120b is reflected back to the spectroscopic surface 112b, and its polarization state is converted to be orthogonal to the polarization state before being incident on the device. Therefore, the light is transmitted at the spectroscopic surface 112b and is emitted from the third output surface 115b to the reflecting means 130. Similar to the first light modulating device 120a, the LCOS panel used in the second light modulating device 120b may also be a color LCOS device such as disclosed in CN2514447Y. The filter for absorbing unwanted color in the color LCOS device can be directly disposed on the pixel or on the package glass, or a heat dissipation structure can be disposed on or near the LCOS to further ensure the safety of the system. Filters can also be placed in the LCOS in a variety of ways, such as applying dye directly to the pixels, or plating the interference filter on the pixels, similar to the processing in LCDs. The second light modulating device 120b may also adopt a transmissive element (for example, a transmissive liquid crystal light valve). At this time, the reflecting device 130 is disposed behind the first output surface 113b and the second light modulating device 120b of the second light modulating device (FIG. 1a) In their left side). The second light modulating device 120b is also connected to the above-described signal processing portion (not shown). The signal processing portion can, for example, deliver the pixel signals to corresponding pixels of the second light modulating device. The signal processing portion may cause the second light tone 200839288 device 120b to modulate the incident light in a pattern different from the first light modulation device 120a, so that the modulated light has a different distribution, and the modulated light is as follows Enter the viewer's eyes so that the viewer can view the stereo image. The reflecting means 130 is arranged to cause the light outputted by the second beam splitting means 110b to propagate in a desired direction and enter the second filter means 140b. In the present embodiment, the light reflected by the reflecting means 130 is substantially parallel to the light emitted from the third output surface 115a of the first beam splitting means 110a. However, depending on the application (e.g., as the viewer's interpupillary size is adjusted), these lines may also have a certain angle between them, and the angle is usually between 0 degrees and about 30 degrees. The reflecting means may be, for example, a mirror plated with a broadband high reflectivity film layer at an angle of 45 degrees with respect to the direction of light propagation, or various prisms, etc., and may be mounted in the head mounted structure by a suitable mechanism. And adjustment. The first filter device 140a and the second filter device 140b may include, for example, polarizing plates that respectively receive light beams output from the first beam splitting device 11a and the reflecting device 130, and have polarization states of crossing directions orthogonal to each other, The residual undesired polarization state is filtered out to improve image quality. The polarization states respectively transmitted through the first filter device 140a and the second filter device 140b can enter the viewer's eye nitrile through the objective lenses 15a, 150b and the eyepieces 160a, 160b disposed behind the both. The head mounted display device of the present invention may include adjustment means for adjusting the position of the objective lens, the eyepiece and/or the above display structure, and the light intensity of the light source to suit the specific needs of different viewers' eyes. The design of the objective lens and the eyepiece and the corresponding adjustment means can be carried out by conventional methods well known in the art and will therefore not be described in detail herein. 200839288 The dark-field illumination mode is adopted in the head-mounted display device of the present invention, and high-contrast is not required, so the requirement of (4) can be reduced, and only one light source is used in this embodiment. Stereoscopic display can be achieved with a simple light path, which can reduce the cost, energy consumption and volume of the system. For example, in the case of a color LCOS panel using _χ6〇〇 resolution as the first and second light modulating means, the size is usually only about 1 cm x 1 cm 'even if the first and second splitting means (for example, two polarizations are split) The volume of the prism and the reflecting device can be easily taken into the head-mounted structure (for example, glasses of (4) or (4)). Fig. 2 shows a schematic view of a planar structure in accordance with a second embodiment of the present invention. The structure is substantially similar to the structure of the first embodiment, with the difference that in the second embodiment, instead of allowing the viewer to directly view the projected content with the eyepieces 160a and 160b, the first split optical state is And the angle of the last optical path of both the polarization states reflected by the reflecting means is projected to a position other than the head-mounted display (for example, a book in the hand, or a wall outside the viewer), the viewer can = Viewing light mirror (_ used to view stereoscopic images when viewing stereoscopic movies. Brother ^Music: The second spectroscopic device and the first and second light modulation devices can be set in a variety of flexible ways, as long as The two are respectively irradiated to the corresponding light modulating device and are arranged in a predetermined direction; the surface is exemplified by the case shown in FIG. 3, and the different arrangement modes of the first and second splitting light are performed. For the sake of simplicity, FIG. 3 does not. ;= 13 cut two objective lens, a mirror. Enter the display: under the device system 'the illumination light from the light source along the + x direction, the decoration ^
偏振態(例如光裳置—相同。因 方向透射，细第悲）仍然經過分光面沿+X 方向反射回㈣製後改變偏振態並沿1 光裝置31〇&。第_ 刀 ，口+Y方向反射離開第一分 裴置3l〇b的分衣置31牝的分光面。第二分光 軸方向成45 Μ。设置成與X軸方向平行並與+ ¥和—2 面而言〜偏：/因此，對於第-分光裝置310a的分光 口苟S偏振恶的第-低 分光面而·^ θ 紙對於弟二分光裝置雇的 光面透射向經過分 即佈置在辞广Μ 77光衣置的底面處°弟二光調製裝置 二氏处。ρ偏振態的光經過第二光調製裝置的 /二改交成S偏振態並沿+Υ方向反射回第二分光裝置 的刀光面，被分光面沿—ζ方向反射離開第二分光裝 、310b，接著由同樣平行於χ軸方向的反射裝置沿+γ方 向反射。或者，也可以將第二分光裝置310b的分光面設置 成與X軸方向平行並與+ Y和+Z方向成45度角，在此情 况下’反射裳置130也相應地設在比第二分光裝置31〇b沿 +Z軸方向更遠的位置處。 又或者’在圖3所示情況下，可以在第一分光裝置31 〇a 與第二分光裝置310b之間設置偏振態轉換元件（例如半波 14 200839288 片）使待被第士刀光叙置310a的分光面反射的偏振態在 到^二分，裝置310b的分光面之前，已經改變成與原先 正父的偏振悲。在此情況下兮伯自t & 旧儿卜，Θ偏振悲在苐二分光裝置^⑽ 龄t面上仍然發生反射，因此第二光調製震置應當設在 弟^光裝置3U)b朝向+z方向的表面處，反射裝置13〇 仍然值於圖3所示位置處。 —與上述類似地，通過將第二分光裝置的分光面方向、 r :二=裝：位置、反射裝置位置以及必要時設置的偏 二^衣置結合使用’可以以多種方式來實施本發明。 迫坠受形也可以與第二實施例結合使用。 圖4 7F出了根據本發明第三實施例—個較完整結構的 :=意圖。其中，發光元件1 (例如led)、使光強度分 ::::均化裝置2 (例如光棒)和場鏡3共同組成類似 :弟貝知例中的光源，偏振分光元件由以圖示方式佈置 白隹二，偏振分光棱鏡4卜4_2和Μ組成。光源發出的光 能、q偏振分光棱鏡後，其中兩種相互正交的偏振 =° —種偏振態（例如P偏振態）穿過第-偏振分 的分光面行進，進人第二偏振分光棱鏡4小並 弟：偏振分光棱鏡4_2的分光面繼續行進 ，經過第一 :衣置12〇&調製後改變偏振態並向左反射，在第二偏 ^刀光棱鏡4-2白勺*光面處向上反射到第一滤、光褒置 4並相繼經過物鏡15〇a、兩個反射器9和目鏡160a 進入觀看者的眼睛。 另一種偏振態（例如S偏振態）在第一偏振分光棱鏡 15 200839288 4-1的分光面向上反射，進入第三偏振分光棱鏡4-3，並在 第三偏振分光棱鏡4-3的分光面向左反射，經過第二光調 製裝置120b調製後改變偏振態並向右反射，穿過第三偏振 分光棱鏡4-3的分光面透射，並穿過四分之一波片6,在反 射器7處發生反射，再次穿過四分之一波片6向左行進到 第三偏振分光棱鏡4-3的分光面。由於穿過偏振分光棱鏡 4-3的分光面透射的光兩次經過四分之一波片6，其偏振態 改變成與原先正交，所以在向左行進到第三偏振分光棱鏡 4-3的分光面時發生反射，向上進入第二濾光裝置140b， 並相繼經過物鏡150b、兩個反射器9和目鏡160b進入觀 看者的眼睛。通過使第一光調製裝置120a和第二光調製裝 置120b以不同的圖像資訊對光進行調製，觀看者即可看到 立體圖像。 本實施例中的光路結構，兩種偏振態從第一、第二光 調製裝置到觀看者眼睛之間行進的光路長度相等，因此可 以使二者之間幾乎沒有損耗差別，也不必為了使兩眼看到 的光強均衡而削減某一路光線的強度。這在某些情況下（例 如對亮度有一定要求）特別有好處。 在上述各實施例中，均使用了一個光源（儘管其中可 、以包括多個發光元件），通過偏振分光元件將其分為兩種相 互正交的偏振態分別為兩個光調製裝置提供照明。但是， 也可以採用具有兩個單獨發光部分的光源，各個發光部分 分別為光調製裝置提供照明，而不必採用上述偏振分光元 件。還可以如圖5的第四實施例所示，採用兩個單獨的光 16 200839288 源S1和S2,每個光源分別為相應的那個光調製裝置120a、 120b提供照明。這樣的結構可以簡化甚至省去上述各實施 例中的偏振分光元件，實現比較簡單的光路結構，並易於 實現頭戴式顯示裝置各部分（例如進入雙眼的兩條光線各 自光路中的元件）之間的重量平衡等。注意，圖5中採用 偏振分光棱鏡對反射式光調製裝置120a、120b (例如彩色 - LCOS元件）進行照明並非必需，也可以採用其他的光路 結構，只要兩光源能夠分別照射到相應的光調製裝置並沿 - 互不重合的路徑出射，為觀看者提供立體顯示即可。 此外，上述各實施例中使用的反射式光調製元件也可 以替換為透射式光調製元件’例如液晶面板、南溫多晶砍 元件（HTPS)等，在此情況下，各實施例中的反射式照明 結構也相應地由透射式照明結構代替，使光線照射到光調 製裝置的一侧並經其調製後從另一侧出射。 需要說明的是，上述各種實施例只是為了便於本領域 . 技術人員的理解而以示例方式對本發明進行的直觀說明’ ^ 本發明的範圍不局限於這些具體的實施例，而由權利要求 來限定。 【圖式簡單說明】 圖1示出了根據本發明第一實施例的結構示意圖。 圖la示出了根據本發明第一實施例的侧視示意圖。 、 圖2示出了根據本發明第二實施例的侧視示意圖。 圖3示出了對本發明第一實施例的一種變形。 17 200839288 圖4示出了根據本發明第三實施例的侧視示意圖。 圖5示出了根據本發明第四實施例的側視示意圖。 【主要元件符號說明】 顯示裝置 100 第一分光裝置 110a 輸入面 111a 分光面 112a 第一輸出面 113a 第二輸出面 114a 第三輸出面 115a 第二分光裝置 110b 輸入面 111b 分光面 112b 第一輸出面 113b 第三輸出面 115b 第一光調製裝置 120a 第二光調製裝置 120b 反射裝置 130 第一濾光裝置 140a 第二濾光裝置 140b 物鏡 150a 和 150b 目鏡 160a 和 160b 顯示裝置 300 第一分光裝置 310a 第二分光裝置 310b 發光元件 1 均化裝置 2 18 200839288 場鏡 3 第一偏振分光棱鏡4-1 . 第二偏振分光棱鏡4-2 第二偏振分光棱鏡4-3 四分之一波片 6 反射器 9 光源 S1和S2The polarization state (for example, the light is set to the same. Because of the direction of transmission, the fineness is sad) is still reflected back in the +X direction through the spectroscopic surface (4) and then changed the polarization state and along the 1 optical device 31〇&. The _ knife, the mouth + Y direction reflection away from the first minute 3 3l 〇 b of the splitting set 31 牝 splitting surface. The second splitting axis direction is 45 Μ. Set to be parallel to the X-axis direction and to the + ¥ and -2 faces to be partial: / Therefore, for the first-low spectroscopic surface of the splitting port 苟S of the first-beam splitting device 310a, the ?- θ paper is for the second The smooth surface of the light-splitting device is transmitted to the bottom of the Guangyao 77 light-clothing device. The light of the ρ-polarized state is converted into the S-polarized state by the second light modulating device and reflected back to the cleavage surface of the second beam splitting device in the +Υ direction, and is reflected by the splitting surface in the ζ direction away from the second beam splitting device, 310b is then reflected in the +γ direction by a reflecting device that is also parallel to the x-axis direction. Alternatively, the spectroscopic surface of the second spectroscopic device 310b may be disposed parallel to the X-axis direction and at an angle of 45 degrees to the +Y and +Z directions, in which case the 'reflective skirt 130 is also set correspondingly to the second The spectroscopic device 31〇b is located further in the +Z-axis direction. Or alternatively, in the case shown in FIG. 3, a polarization conversion element (for example, a half-wave 14 200839288 piece) may be disposed between the first beam splitting device 31 〇 a and the second beam splitting device 310 b to be lighted by the taxi knife The polarization state of the spectroscopic surface of 310a is changed to the polarization of the original positive parent before the dichroic surface of the device 310b. In this case, the 光 自 t t t 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 旧 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 仍然 第二 第二 第二 第二At the surface in the +z direction, the reflecting means 13 is still at the position shown in FIG. - Similarly to the above, the present invention can be implemented in various ways by combining the direction of the splitting surface of the second spectroscopic device, the r: two = mounting position, the position of the reflecting means, and the biasing means provided if necessary. The forced shape can also be used in combination with the second embodiment. Figure 4 7F shows a more complete structure in accordance with a third embodiment of the present invention: = Intent. Wherein, the light-emitting element 1 (for example, led), the light intensity is divided into:::: the homogenizing device 2 (for example, the light rod) and the field lens 3 are combined to form a similar light source: the polarization light splitting element is illustrated by The arrangement is white, two, and the polarization beam splitting prism 4 is composed of 4_2 and Μ. After the light energy emitted by the light source and the q-polarization beam splitting prism, two mutually orthogonal polarizations=°-type polarization states (for example, P-polarization states) travel through the spectroscopic surface of the first polarization component, and enter the second polarization beam splitting prism. 4 small brother: the beam splitting surface of the polarization beam splitting prism 4_2 continues to travel, after the first: clothing 12〇 & modulation to change the polarization state and reflect to the left, in the second partial light prism 4-2 * light The face is reflected upward to the first filter, diaphragm 4 and successively through the objective lens 15A, the two reflectors 9 and the eyepiece 160a into the viewer's eyes. The other polarization state (for example, the S polarization state) is reflected on the light splitting surface of the first polarization beam splitting prism 15 200839288 4-1, enters the third polarization beam splitting prism 4-3, and is disposed at the light splitting surface of the third polarization beam splitting prism 4-3. The left reflection, modulated by the second light modulating device 120b, changes the polarization state and reflects to the right, transmits through the beam splitting surface of the third polarization beam splitting prism 4-3, and passes through the quarter wave plate 6, at the reflector 7 Reflection occurs at the same time, and passes through the quarter wave plate 6 again to the left to the light splitting surface of the third polarization beam splitting prism 4-3. Since the light transmitted through the spectroscopic surface of the polarization beam splitting prism 4-3 passes through the quarter-wave plate 6 twice, its polarization state is changed to be orthogonal to the original, so it travels to the left to the third polarization beam splitting prism 4-3. The splitting surface is reflected, moves up into the second filter device 140b, and successively passes through the objective lens 150b, the two reflectors 9, and the eyepiece 160b into the viewer's eyes. By modulating the light by the first light modulating device 120a and the second light modulating device 120b with different image information, the viewer can see the stereoscopic image. In the optical path structure in this embodiment, the optical paths of the two polarization states traveling from the first and second light modulating devices to the viewer's eyes are equal in length, so that there is almost no loss difference between the two, and it is not necessary to make two The light intensity seen by the eye is balanced to reduce the intensity of a certain path of light. This is especially beneficial in certain situations, such as certain brightness requirements. In each of the above embodiments, a light source (although it may be included to include a plurality of light-emitting elements) is used, and the polarization splitting element is divided into two mutually orthogonal polarization states to respectively illuminate the two light modulation devices. . However, it is also possible to use a light source having two separate light-emitting portions, each of which provides illumination for the light modulating device, respectively, without using the above-described polarization splitting element. It is also possible to use two separate lights 16 200839288 sources S1 and S2, each of which provides illumination for the respective one of the light modulating devices 120a, 120b, as shown in the fourth embodiment of Fig. 5. Such a structure can simplify or even eliminate the polarization beam splitting elements in the above embodiments, realize a relatively simple optical path structure, and easily realize various parts of the head mounted display device (for example, components in the respective optical paths of the two rays entering the eyes) The balance between weight and so on. Note that it is not necessary to illuminate the reflective light modulating devices 120a, 120b (for example, color-LCOS components) using a polarization beam splitting prism in FIG. 5, and other light path structures may be employed as long as the two light sources can be respectively irradiated to the corresponding light modulating devices. And along the - non-coincident path to provide a stereoscopic display for the viewer. Further, the reflective light modulation element used in each of the above embodiments may be replaced by a transmissive light modulation element such as a liquid crystal panel, a south temperature polycrystalline chopping element (HTPS), or the like. In this case, the reflection in each embodiment The illumination structure is correspondingly replaced by a transmissive illumination structure that illuminates the light modulation device and modulates it from the other side. It should be noted that the various embodiments described above are merely illustrative of the invention in order to facilitate the understanding of the skilled person in the art. The scope of the present invention is not limited to the specific embodiments, but is defined by the claims. . BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a schematic structural view of a first embodiment of the present invention. Figure la shows a side view of a first embodiment of the invention. 2 shows a side view of a second embodiment of the present invention. Fig. 3 shows a modification of the first embodiment of the present invention. 17 200839288 Figure 4 shows a side view of a third embodiment of the invention. Fig. 5 shows a schematic side view of a fourth embodiment of the invention. [Main component symbol description] Display device 100 First light splitting device 110a Input surface 111a Light splitting surface 112a First output surface 113a Second output surface 114a Third output surface 115a Second light splitting device 110b Input surface 111b Light splitting surface 112b First output surface 113b third output surface 115b first light modulation device 120a second light modulation device 120b reflection device 130 first filter device 140a second filter device 140b objective lens 150a and 150b eyepieces 160a and 160b display device 300 first beam splitter 310a Dichotomy device 310b Light-emitting element 1 Homogenization device 2 18 200839288 Field lens 3 First polarization beam splitting prism 4-1. Second polarization beam splitting prism 4-2 Second polarization beam splitting prism 4-3 Quarter-wave plate 6 Reflector 9 light source S1 and S2
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