TWM535811U - Reflective virtual image displaying device - Google Patents
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本新型係關於一種顯示裝置;更特別言之,本新型係關於一種可具有多種應用型態之反射式虛像顯示裝置。 The present invention relates to a display device; more particularly, the present invention relates to a reflective virtual image display device that can have a variety of application types.
各式顯示裝置已是現行日常生活中所必需。習知顯示裝置多半以一固定屏幕顯示所需訊息,例如配置於電腦之電腦螢幕、配置於各式儀器設備之控制螢幕、或配置於車輛儀表板之嵌入式螢幕等。惟基於對各種應用需求日漸多樣化,前述固定式的顯示裝置已逐漸不敷所需。 Various display devices are already required in current daily life. Conventional display devices mostly display desired information on a fixed screen, such as a computer screen disposed on a computer, a control screen disposed on various instruments, or an embedded screen disposed on a vehicle dashboard. However, based on the increasing variety of applications, the aforementioned fixed display devices have gradually become insufficient.
現今已發展有各式顯示裝置的擴展應用方式。舉例而言,用於車輛的抬頭顯示器(HUD,Head Up Display)已可見於新發售之汽車上。此外,基於現代人們對獲取即時訊息的需求日漸殷切,顯示裝置朝輕薄微小方向發展已是必然趨勢。現行如google glass等小型顯示裝置已展現此小型化發展趨勢。另頭戴式顯示裝置(HMD,Head Mounted Display)亦為近年熱門議題。頭戴式顯示裝置一般可將影像訊息呈現於使用者頭上所穿戴之顯示器。早期係用於飛行員所使用之頭盔以便能獲致各式訊息增加飛行安全性。近期亦有將頭戴式顯示裝 置用於虛擬實境(VR,Virtual Reality)或擴增實境(AR,Augmented Reality)的應用。於前述各式顯示裝置中,大多係呈現二維之影像訊息。近期基於對擬真及互動的需求,虛擬實境(VR,Virtual Reality)或擴增實境(AR,Augmented Reality)則呈現立體三維影像,而能有更進階之應用型態。 An extended application form of various display devices has been developed today. For example, a Head Up Display (HUD) for a vehicle can be found on a newly released car. In addition, based on the increasing demand of modern people for obtaining instant messages, it is an inevitable trend that display devices are moving in a light and thin direction. Current small display devices such as google glass have shown this trend of miniaturization. Another head mounted display device (HMD, Head Mounted Display) is also a hot topic in recent years. Head-mounted display devices typically present image information to a display worn by the user's head. Early use was used for helmets used by pilots in order to be able to obtain a variety of messages to increase flight safety. Head-mounted display Applications for Virtual Reality (VR) or Augmented Reality (AR). In the above various display devices, most of the two-dimensional image information is presented. Recently, based on the need for immersive and interactive, Virtual Reality (VR) or Augmented Reality (AR) presents stereoscopic 3D images, and can have more advanced application types.
然而,上述無論是大型或小型的顯示裝置,為了呈現出所需的二維或立體三維影像訊息,其光學構件仍複雜,也因此侷限了立體影像顯示裝置可擴展的應用範圍。 However, in the above-mentioned large or small display devices, in order to present the required two-dimensional or three-dimensional three-dimensional image information, the optical components are still complicated, and thus the scope of application of the stereoscopic image display device is limited.
緣此,發展具有簡易結構、易於與現行儀器設備整合使用且能呈現二維或立體三維影像之顯示裝置,已為立體影像顯示裝置改進的當務之急。 Therefore, the development of a display device having a simple structure, being easy to integrate with current instruments and devices, and capable of presenting two-dimensional or three-dimensional three-dimensional images has become an urgent task for the improvement of the stereoscopic image display device.
本新型提供一種具簡易結構及可呈現二維或立體三維影像之反射式虛像顯示裝置。透過調變影像源、部分反射單元、各式光學元件以及虛像間的相對位置、相對距離,可獲得多樣化之應用型態。調變影像源、部分反射單元、各式光學元件以及虛像間的相對位置、相對距離及光學參數最佳化的配置,獲得多樣化之應用型態。本新型並一併揭示最佳化光學參數,以便獲致較佳的顯示效果。 The present invention provides a reflective virtual image display device having a simple structure and capable of presenting two-dimensional or three-dimensional three-dimensional images. By modulating the relative position and relative distance between the image source, the partial reflection unit, various optical elements, and the virtual image, a variety of application forms can be obtained. A variety of application forms are obtained by modulating the relative position, relative distance, and optical parameter optimization between the image source, the partial reflection unit, various optical elements, and the virtual image. The present invention also discloses optimized optical parameters for better display performance.
為達上述目的,本新型提供一種反射式虛像顯示裝置,其包含一影像源以及一部分反射單元。影像源用以投射一投影影像。其中投影影像可為一二維影像或一立體三維影像。部分反射單元包含一第一表面及一第二表面,第一表面用 以接收並反射由影像源投射之投影影像至一使用者雙眼,使用者雙眼看穿第一表面,並於第二表面同側看到與投影影像具相同訊息內容、放大尺寸且呈二維或立體三維之一虛像及一外部背景。其中使用者雙眼對應部分反射單元之眼睛盒(Eye Box)為圓形或長方形,若眼睛盒(Eye Box)為圓形,則其直徑大於等於60mm;若眼睛盒(Eye Box)為長方形,則其長度大於等於60mm,高度大於等於6mm。使用者雙眼與虛像之距離為大於等於250mm。部分反射單元之第一表面與使用者之距離為10~1500mm。部分反射單元之第一表面為凹面且為球面或非球面,其有效焦距(EFL)大於等於10mm,小於等於1000mm,藉此調變虛像之放大倍率。部分反射單元之第二表面上鍍有一抗反射膜。 To achieve the above object, the present invention provides a reflective virtual image display device comprising an image source and a portion of the reflection unit. The image source is used to project a projected image. The projected image may be a two-dimensional image or a three-dimensional three-dimensional image. The partial reflection unit includes a first surface and a second surface, and the first surface is used Receiving and reflecting the projected image projected by the image source to a user's eyes, the user sees through the first surface with both eyes, and sees the same message content, enlarged size and two-dimensional on the same side of the second surface as the projected image. Or a stereoscopic three-dimensional virtual image and an external background. The Eye Box of the user's eyes corresponding to the partial reflection unit is circular or rectangular, and if the Eye Box is circular, the diameter is 60 mm or more; if the Eye Box is rectangular, Then its length is greater than or equal to 60mm, and the height is greater than or equal to 6mm. The distance between the user's eyes and the virtual image is 250 mm or more. The distance between the first surface of the partial reflection unit and the user is 10 to 1500 mm. The first surface of the partial reflection unit is concave and spherical or aspherical, and its effective focal length (EFL) is greater than or equal to 10 mm and less than or equal to 1000 mm, thereby modulating the magnification of the virtual image. The second surface of the partial reflection unit is plated with an anti-reflection film.
上述反射式虛像顯示裝置中,其中於部分反射單元之第二表面同側裝設有一液晶顯示面板,其係用以透過液晶分子旋轉切換外部背景之光線穿透比例。 In the above-mentioned reflective virtual image display device, a liquid crystal display panel is mounted on the same side of the second surface of the partial reflection unit for rotating the liquid crystal molecules to switch the light penetration ratio of the external background.
上述反射式虛像顯示裝置中,影像源可來自一液晶顯示器(LCD)、一數位光處理投影機(DLP)、一矽基液晶投影機(LCOS)、一有機顯示器(OLED)、一手機、一衛星導航系統(GPS)、一平板電腦或一相機之投影影像。部分反射單元之第一表面之反射率為50%~80%。 In the above reflective virtual image display device, the image source may be from a liquid crystal display (LCD), a digital light processing projector (DLP), a lithium-based liquid crystal projector (LCOS), an organic display (OLED), a mobile phone, and a A projected image of a satellite navigation system (GPS), a tablet, or a camera. The reflectance of the first surface of the partial reflection unit is 50% to 80%.
上述反射式虛像顯示裝置中,更包含至少一反射鏡。反射鏡用以改變影像源所投射之投影影像之投影方向,藉以縮短影像源與部分反射單元之距離。 The reflective virtual image display device further includes at least one mirror. The mirror is used to change the projection direction of the projected image projected by the image source, thereby shortening the distance between the image source and the partial reflection unit.
上述反射式虛像顯示裝置中,影像源相對部分反 射單元具有一偏移量,偏移量大於等於0mm,小於等於60mm。該影像源相對該部分反射單元具有一偏移角度,該偏移角度大於等於0度,小於等於30度。 In the above reflective virtual image display device, the image source is opposite in part The firing unit has an offset, and the offset is greater than or equal to 0 mm and less than or equal to 60 mm. The image source has an offset angle with respect to the partial reflection unit, and the offset angle is greater than or equal to 0 degrees and less than or equal to 30 degrees.
於另一實施例中,本新型所一種反射式虛像顯示裝置,其包含二影像源以及二部分反射單元。二影像源用以各別投射一投影影像。各部分反射單元包含一第一表面及一第二表面,各第一表面用以接收並反射由各影像源投射之投影影像至一使用者之一單眼,使用者之二單眼各別接受各部分反射單元反射之投影影像後,看穿各該第一表面,並於各第二表面同側看到由各投影源所投射之投影影像組合而成,具放大尺寸且呈立體三維之一虛像及一外部背景。其中使用者任一單眼對應各部分反射單元之之出瞳直徑大於等於2mm。各部分反射單元之第一表面為凹面且為球面或非球面,其有效焦距(EFL)大於等於10mm,小於等於1000mm,藉此調變虛像之放大倍率。使用者之任一單眼與虛像之距離為大於等於250mm。各部分反射單元之第一表面與使用者任一單眼之距離為10~1500mm。 In another embodiment, a reflective virtual image display device of the present invention includes two image sources and a two-part reflection unit. The two image sources are used to project a projection image separately. Each of the partial reflection units includes a first surface and a second surface. Each of the first surfaces is configured to receive and reflect a projected image projected by each image source to a single eye of a user, and the user's two eyes respectively accept each part. After the reflected image reflected by the reflecting unit, the first surface is seen through, and the projected images projected by the respective projection sources are combined on the same side of each second surface, and the enlarged size is a three-dimensional one-dimensional virtual image and one External background. The diameter of the exit pupil of each of the single-eye corresponding to each of the partial reflection units is greater than or equal to 2 mm. The first surface of each partial reflection unit is concave and spherical or aspherical, and its effective focal length (EFL) is greater than or equal to 10 mm and less than or equal to 1000 mm, thereby modulating the magnification of the virtual image. The distance between any single eye of the user and the virtual image is greater than or equal to 250 mm. The distance between the first surface of each partial reflection unit and any single eye of the user is 10 to 1500 mm.
上述反射式虛像顯示裝置中,於各部分反射單元之第二表面同側裝設有一液晶顯示面板,其係用以透過液晶分子旋轉切換外部背景之光線穿透比例。 In the above-mentioned reflective virtual image display device, a liquid crystal display panel is mounted on the same side of the second surface of each of the partial reflection units for rotating the liquid crystal molecules to switch the light penetration ratio of the external background.
上述反射式虛像顯示裝置中,各部分反射單元之第一表面之反射率為50%~80%。各部分反射單元之第二表面上可鍍有一抗反射膜。 In the above reflective virtual image display device, the reflectance of the first surface of each partial reflection unit is 50% to 80%. An anti-reflection film may be plated on the second surface of each of the partial reflection units.
上述反射式虛像顯示裝置中,影像源可來自一液 晶顯示器(LCD)、一數位光處理投影機(DLP)、一矽基液晶投影機(LCOS)、一有機顯示器(OLED)、一手機、一衛星導航系統(GPS)、一平板電腦或一相機之投影影像。 In the above reflective virtual image display device, the image source can be from a liquid Crystal display (LCD), a digital light processing projector (DLP), a lithium-based liquid crystal projector (LCOS), an organic display (OLED), a mobile phone, a satellite navigation system (GPS), a tablet computer or a camera Projected image.
上述反射式虛像顯示裝置中,更包含至少一反射鏡。反射鏡用以改變各影像源所投射之投影影像之投影方向,藉以縮短各影像源與各部分反射單元之距離。 The reflective virtual image display device further includes at least one mirror. The mirror is used to change the projection direction of the projected image projected by each image source, thereby shortening the distance between each image source and each partial reflection unit.
上述反射式虛像顯示裝置中,各影像源相對各部分反射單元具有一垂直偏移量,垂直偏移量大於等於0mm,小於等於60mm。各影像源相對各部分反射單元具有一偏移角度,偏移角度大於等於0度,小於等於30度。 In the above-mentioned reflective virtual image display device, each image source has a vertical offset with respect to each partial reflection unit, and the vertical offset is greater than or equal to 0 mm and less than or equal to 60 mm. Each image source has an offset angle with respect to each partial reflection unit, and the offset angle is greater than or equal to 0 degrees and less than or equal to 30 degrees.
100‧‧‧反射式虛像顯示裝置 100‧‧‧Reflective virtual image display device
101‧‧‧影像源 101‧‧‧Image source
102‧‧‧部分反射單元 102‧‧‧Partial reflection unit
102a‧‧‧第一表面 102a‧‧‧ first surface
102b‧‧‧第二表面 102b‧‧‧second surface
103‧‧‧反射鏡 103‧‧‧Mirror
104‧‧‧液晶顯示面板 104‧‧‧LCD panel
S‧‧‧虛像 S‧‧‧virtual image
B‧‧‧外部背景 B‧‧‧External background
第1圖係繪示本新型第一實施例之反射式虛像顯示裝置示意圖;第2A圖係繪示第1圖中之眼睛盒(Eye Box)為圓形示意圖;第2B圖係繪示第1圖中之眼睛盒(Eye Box)為長方形示意圖;第3圖係繪示本新型第二實施例之反射式虛像顯示裝置示意圖;第4圖係繪示本新型第三實施例之反射式虛像顯示裝置示意圖; 第5圖係繪示本新型第四實施例之反射式虛像顯示裝置示意圖;第6圖係繪示第5圖中之反射式虛像顯示裝置之MTF曲線圖;第7圖係繪示第5圖中之反射式虛像顯示裝置之場曲線及歪曲曲線圖;第8圖係繪示本新型第五實施例之反射式虛像顯示裝置示意圖;第9圖係繪示第8圖中之反射式虛像顯示裝置之MTF曲線圖;第10圖係繪示第8圖中之反射式虛像顯示裝置之場曲線及歪曲曲線圖;第11圖係繪示本新型第六實施例之反射式虛像顯示裝置示意圖;第12圖係繪示第11圖中之反射式虛像顯示裝置之MTF曲線圖;第13圖係繪示第11圖中之反射式虛像顯示裝置之場曲線及歪曲曲線圖;第14圖係繪示本新型第七實施例之反射式虛像顯示裝置示意圖;第15圖係繪示第14圖中之反射式虛像顯示裝置之MTF曲線圖;以及第16圖係繪示第14圖中之反射式虛像顯示裝置之場曲線及歪曲曲線圖。 1 is a schematic view showing a reflective virtual image display device according to a first embodiment of the present invention; FIG. 2A is a circular schematic view of the eye box (Eye Box) in FIG. 1; The eye box (Eye Box) is a rectangular schematic view; the third figure is a schematic diagram of the reflective virtual image display device of the second embodiment of the present invention; and the fourth figure is a reflective virtual image display of the third embodiment of the present invention. Schematic diagram of the device; 5 is a schematic view showing a reflective virtual image display device according to a fourth embodiment of the present invention; FIG. 6 is a view showing an MTF graph of the reflective virtual image display device in FIG. 5; and FIG. 7 is a fifth drawing; The field curve and the tortuous curve diagram of the reflective virtual image display device; the figure 8 is a schematic diagram of the reflective virtual image display device of the fifth embodiment; and the figure 9 shows the reflective virtual image display of FIG. The MTF graph of the device; FIG. 10 is a view showing a field curve and a curved curve of the reflective virtual image display device in FIG. 8; and FIG. 11 is a schematic view showing the reflective virtual image display device according to the sixth embodiment of the present invention; Figure 12 is a diagram showing the MTF graph of the reflective virtual image display device in Fig. 11; and Fig. 13 is a graph showing the field curve and the distortion curve of the reflective virtual image display device in Fig. 11; A schematic diagram of a reflective virtual image display device according to a seventh embodiment of the present invention; a 15th drawing showing an MTF graph of the reflective virtual image display device in FIG. 14; and a 16th drawing showing a reflective image in FIG. The field curve and the tortuous curve of the virtual image display device.
以下將參照圖式說明本新型之複數個實施例。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新型。也就是說,在本新型部分實施例中,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。 Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. For the sake of clarity, many practical details will be explained in the following description. However, it should be understood that these practical details are not intended to limit the novel. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.
本新型之反射式虛像顯示裝置,可依據實際狀況,調變影像源101、部分反射單元102、各式光學元件以及虛像S間的相對位置、相對距離及光學參數最佳化的配置,獲得多樣化之應用型態。將於下述段落中,述及多種反射式虛像顯示裝置100之實施例及應用例,並一併揭示最佳化光學參數,以便獲致較佳的顯示效果。 The reflective virtual image display device of the present invention can modulate the relative position, relative distance, and optical parameter optimization configuration between the image source 101, the partial reflection unit 102, various optical elements, and the virtual image S according to actual conditions, and obtain various types. Application form. Embodiments and application examples of various reflective virtual image display devices 100 will be described in the following paragraphs, and the optimized optical parameters are also disclosed to achieve a better display effect.
請參照第1圖。第1圖係繪示本新型第一實施例之反射式虛像顯示裝置100示意圖。反射式虛像顯示裝置100基本包含一影像源101以及一部分反射單元102。影像源101用以投射投影影像。於下述的實施例中,影像源101係來自於手機螢幕所投射之投影影像。於其他可能的實施例中,影像源101亦可來自液晶顯示器(LCD)、數位光處理投影機(DLP)、矽基液晶投影機(LCOS)、有機顯示器(OLED)、衛星導航系統(GPS)、平板電腦或相機之投影影像。部分反射單元102包含第一表面102a及第二表面102b。第一表面102a為凹面且可為球面或非球面,其用以接收並反射由影像源101投射之投影影 像至一使用者雙眼。此時,使用者可於與部分反射單元102之第二表面102b同側,看到與投影影像具相同訊息內容且具放大尺寸之一虛像S。此處調變虛像S之放大倍率可透過調變部分反射單元102之第一表面102a的有效焦距(EFL)得到。有效焦距大於等於10mm,小於等於1000mm。當有效焦距越小,則可得到放大倍率較大之虛像S,此時使用者雙眼視角越大。於第1圖中,部分反射單元102之第一表面102a之反射率為50%~80%,亦即,使用者可穿透部分反射單元102看到呈現於使用者雙眼前之虛像S,並同時可看到外部景物B。 Please refer to Figure 1. 1 is a schematic view showing a reflective virtual image display device 100 of the first embodiment of the present invention. The reflective virtual image display device 100 basically includes an image source 101 and a portion of the reflection unit 102. The image source 101 is used to project a projected image. In the embodiment described below, the image source 101 is derived from a projected image projected by a mobile phone screen. In other possible embodiments, the image source 101 may also be from a liquid crystal display (LCD), a digital light processing projector (DLP), a germanium-based liquid crystal projector (LCOS), an organic display (OLED), and a satellite navigation system (GPS). Projected image of a tablet or camera. The partial reflection unit 102 includes a first surface 102a and a second surface 102b. The first surface 102a is concave and may be a spherical or aspherical surface for receiving and reflecting a projection image projected by the image source 101. Like a user's eyes. At this time, the user can see the same message content as the projected image and has a virtual image S of an enlarged size on the same side as the second surface 102b of the partial reflection unit 102. Here, the magnification of the modulated virtual image S can be obtained by modulating the effective focal length (EFL) of the first surface 102a of the partial reflection unit 102. The effective focal length is greater than or equal to 10 mm and less than or equal to 1000 mm. When the effective focal length is smaller, a virtual image S with a larger magnification can be obtained, and the user's binocular angle of view is larger at this time. In FIG. 1 , the reflectivity of the first surface 102 a of the partial reflection unit 102 is 50% to 80%, that is, the user can penetrate the partial reflection unit 102 to see the virtual image S presented in front of the eyes of the user, and At the same time, you can see the external scene B.
影像源101之投影影像可為二維影像或立體三維影像。當影像源101之投影影像為二維影像,則由使用者雙眼可看到呈二維之虛像S。當影像源101之投影影像為三維影像,則由使用者雙眼可看到呈立體三維之虛像S。藉此,可以形成裸視3D的效果。 The projected image of the image source 101 can be a two-dimensional image or a stereoscopic three-dimensional image. When the projected image of the image source 101 is a two-dimensional image, the two-dimensional virtual image S can be seen by both eyes of the user. When the projected image of the image source 101 is a three-dimensional image, the virtual image S of the stereoscopic three-dimensional image can be seen by the user's eyes. Thereby, the effect of the naked eye 3D can be formed.
為了符合實際狀況,另可使用一反射鏡103改變由影像源101所投射之投影影像之投影方向,以便使投影影像轉折而能為使用者雙眼所看到。此反射鏡103除改變投影方向外,亦具有調整虛像S方向的功能,此係因影像源101所投射之投影影像經部分反射單元102反射後,使用者雙眼所看到為上下顛倒之虛像S。經過反射鏡103反射後,會將虛像S方向轉正,此時使用者所看到為與影像源101所投射之投影影像方向相同之虛像S。於不使用反射鏡103時,可預先調整影像源101所投射之投影影像的方向(例如:旋轉手機螢幕方向),此時最終使用者雙眼亦可視得方向正確之虛像S。此外,透過反射鏡 103的設置,由於光路經過轉折,亦可縮短影像源101與部分反射單元102之距離,以便形成更為緊湊之配置以簡易地與其他設備整合。 In order to meet the actual situation, a mirror 103 can be used to change the projection direction of the projected image projected by the image source 101, so that the projected image can be turned and seen by the user's eyes. In addition to changing the projection direction, the mirror 103 also has the function of adjusting the direction of the virtual image S. This is because the projected image projected by the image source 101 is reflected by the partial reflection unit 102, and the user sees the virtual image upside down by both eyes. S. After being reflected by the mirror 103, the virtual image S direction is turned positive, and the user sees the virtual image S in the same direction as the projected image projected by the image source 101. When the mirror 103 is not used, the direction of the projected image projected by the image source 101 can be adjusted in advance (for example, the direction of the screen of the mobile phone is rotated), and the virtual image S of the correct direction can be seen by both ends of the user. In addition, through the mirror The setting of 103, as the optical path passes through, can also shorten the distance between the image source 101 and the partial reflection unit 102, so as to form a more compact configuration for easy integration with other devices.
反射式虛像顯示裝置100中,影像源101相對部分反射單元102可具有一垂直偏移量,其值大於等於0mm,小於等於60mm。並且,影像源101相對部分反射單元102亦可具有一偏移角度,其值大於等於0度,小於等於30度。調變上述垂直偏移量及偏移角度可調變光程差,進而影響像差(Aberration)而調變MTF(Modulation Transformation Function)值。此MTF值將影響成像之解像力,將於後續段落有較詳細說明。欲削減像差之另外方式為使用一輔助光學件,其係設置於影像源101與部分反射單元102間,亦可用以降低虛像之像差。輔助光學件可為一場鏡、一菱鏡(prism)、一微鏡陣列(micro lens array)、一光擴散件(diffuser)、一(全像光學元件(HOE)。 In the reflective virtual image display device 100, the image source 101 may have a vertical offset relative to the partial reflection unit 102, and its value is greater than or equal to 0 mm and less than or equal to 60 mm. Moreover, the image source 101 may also have an offset angle with respect to the partial reflection unit 102, and the value thereof is greater than or equal to 0 degrees and less than or equal to 30 degrees. Modulating the above-mentioned vertical offset and offset angle adjustable optical path difference, thereby affecting the aberration (Aberration) and modulating the MTF (Modulation Transformation Function) value. This MTF value will affect the imaging resolution and will be described in more detail in subsequent paragraphs. Another way to reduce the aberration is to use an auxiliary optical component, which is disposed between the image source 101 and the partial reflection unit 102, and can also be used to reduce the aberration of the virtual image. The auxiliary optics can be a mirror, a prism, a micro lens array, a diffuser, and a holographic optical element (HOE).
請續參照第2A圖及第2B圖。第2A圖係繪示第1圖中之眼睛盒(Eye Box)為圓形示意圖。第2B圖係繪示第1圖中之眼睛盒(Eye Box)為長方形示意圖。由於虛像顯示裝置100不僅要呈現出放大影像,同時成像位置要在人眼能夠舒適觀看處,且在人眼轉動時不至導致影像的失真或變形。當放大元件的孔徑太小,無法得到完整的視野(FOV,Field Of View),影像會被截掉或是有暈影。眼睛盒(Eye Box)是指眼球在不會影響影像品質的前提下,可以移動的程度,只有足夠大的眼睛盒才能看到完整的虛像S。由於本實施例中,係使用 單一個部分反射單元102搭配使用者雙眼,為能視得完整之虛像S,使用者雙眼對應之眼睛盒(Eye Box)可定義為圓形或長方形,若眼睛盒(Eye Box)為圓形,則其直徑大於等於60mm;若眼睛盒(Eye Box)為長方形,則其長度大於等於60mm,高度大於等於6mm。 Please continue to refer to Figures 2A and 2B. Fig. 2A is a schematic view showing the eye box (Eye Box) in Fig. 1 as a circular shape. Fig. 2B is a schematic view showing the eye box (Eye Box) in Fig. 1 as a rectangle. Since the virtual image display device 100 not only presents an enlarged image, but also the imaging position is to be able to be comfortably viewed by the human eye, and does not cause distortion or distortion of the image when the human eye rotates. When the aperture of the amplifying element is too small to obtain a full field of view (FOV, Field Of View), the image will be cut off or fainted. Eye Box refers to the extent to which the eyeball can move without affecting the image quality. Only a large enough eye box can see the complete virtual image S. Because in this embodiment, it is used A single partial reflection unit 102 is matched with the user's eyes, so that the eye box corresponding to the user's eyes can be defined as a circle or a rectangle, if the eye box (Eye Box) is a circle. Shape, the diameter is greater than or equal to 60mm; if the Eye Box is rectangular, its length is greater than or equal to 60mm, and the height is greater than or equal to 6mm.
由於本實施例中,同時可看到呈現於使用者雙眼前之虛像S及外部背景B,第1圖中,藉由在部分反射單元102的第二表面102b側裝設一液晶顯示面板104,液晶顯示面板104可為平面狀或弧面狀,可透過液晶分子旋轉切換光線穿透比例而改變外部背景之光線穿透比例。當液晶分子旋轉切換至關閉狀態時,則外部背景之光線不可通過,此時外部背景B不可見,藉此可避免因外部背景B過亮而使虛像S的清晰度受到影響。當然亦可調變液晶分子旋轉切換的關閉/開啟狀態的比例,使外部背景B依照不同使用情況而有不同的光線穿透比例液晶顯示面板104可與部分反射單元102的第二表面102b分開一距離,或直接貼合於部分反射單元102的第二表面102b,可視實際狀況應用之。此外,於部分反射單元101的第二表面102b可鍍有抗反射膜,可減少疊影的產生,使虛像S更為清晰。 In this embodiment, the virtual image S and the external background B appearing in front of the eyes of the user are simultaneously visible. In the first figure, a liquid crystal display panel 104 is disposed on the second surface 102b side of the partial reflection unit 102. The liquid crystal display panel 104 can be planar or curved, and can change the light penetration ratio of the external background by rotating the liquid crystal molecules to switch the light penetration ratio. When the liquid crystal molecules are switched to the off state, the light of the external background is not passed, and the external background B is not visible, thereby preventing the sharpness of the virtual image S from being affected by the excessive brightness of the external background B. Of course, the ratio of the closed/on state of the liquid crystal molecule rotation switching can also be modulated, so that the external background B has different light transmittance ratios according to different usage conditions. The liquid crystal display panel 104 can be separated from the second surface 102b of the partial reflection unit 102. The distance, or directly attached to the second surface 102b of the partial reflection unit 102, can be applied depending on the actual situation. In addition, the second surface 102b of the partial reflection unit 101 can be plated with an anti-reflection film, which can reduce the generation of the image and make the virtual image S clearer.
請續參照第3圖。第3圖係繪示本新型第二實施例之反射式虛像顯示裝置100示意圖。此實施例省略了反射鏡103之使用。影像源101所投射之投影影像為部分反射單元102之第一表面102a直接反射至使用者雙眼。此時,使用者可於與部分反射單元102之第二表面102b同側看到與投影影像具相同訊息內容且具放大尺寸之一呈二維或立體三維之虛像S。 Please continue to refer to Figure 3. 3 is a schematic view showing a reflective virtual image display device 100 of the second embodiment of the present invention. This embodiment omits the use of the mirror 103. The projected image projected by the image source 101 is such that the first surface 102a of the partial reflection unit 102 is directly reflected to the eyes of the user. At this time, the user can see the same image content as the projected image on the same side of the second surface 102b of the partial reflection unit 102 and have a virtual image S of one or two dimensions in one of the enlarged sizes.
請續參照第4圖。第4圖係繪示本新型第三實施例之反射式虛像顯示裝置100示意圖。前述已說明反射鏡103可改變由影像源101所投射之投影影像之投影方向以及虛像S之方向。於第3圖中,可依據實際使用狀況使用多個反射鏡103進行多重反射,可轉折光路而縮短影像源101與部分反射單元102之距離,以便縮小反射式虛像顯示裝置100之體積。 Please continue to refer to Figure 4. 4 is a schematic view showing a reflective virtual image display device 100 according to a third embodiment of the present invention. The mirror 103 has been described above to change the projection direction of the projected image projected by the image source 101 and the direction of the virtual image S. In FIG. 3, a plurality of mirrors 103 can be used for multiple reflection according to actual use conditions, and the optical path can be turned to shorten the distance between the image source 101 and the partial reflection unit 102, so as to reduce the volume of the reflective virtual image display device 100.
投影源101所投射之投影影像可經部分反射單元101放大而形成使用者雙眼可視之放大虛像S。此實施例可應用於例如桌上型電腦之螢幕、嵌入式螢幕、電視螢幕或電影螢幕等。由於呈現為懸空虛像S,且大小可任意調整,因此可取代現行使用固定式螢幕之方式,具應用上之靈活性。 The projected image projected by the projection source 101 can be enlarged by the partial reflection unit 101 to form an enlarged virtual image S visible to the user's eyes. This embodiment can be applied to, for example, a screen of a desktop computer, an embedded screen, a television screen, or a movie screen. Since it is presented as a dangling virtual image S, and the size can be arbitrarily adjusted, it can replace the current use of a fixed screen, and has application flexibility.
前述第1圖至第4圖中的反射式虛像顯示裝置100,由於結構簡單,故可高度整合於如頭戴式顯示裝置(HMD)、抬頭顯示器(HUD)等,作為主要光學元件。舉例而言,可裝設於頭盔內或裝設於汽車儀表板內,作為顯示影像訊息來源。同時,前述第1圖至第3圖中的反射式虛像顯示裝置100,除了可提供二維影像外,亦可改變影像源101及部分反射單元102數量而得到立體三維影像(例如用以形成虛擬實境或擴增實境)。並且,影像源101、部分反射單元102、反射鏡103以及虛像S間的相對位置、相對距離及光學參數最佳化的配置,更能調變以便能應用於近端顯示裝置(HUD、HMD)或遠端顯示裝置(投影螢幕)等。舉例而言,部分反射單元102之第一表面102a之有效焦距EFL可大於等於10mm,小於等於1000mm;使用者雙眼與虛像S之距離為250mm至無窮大; 部分反射單元102之第一表面102a與使用者雙眼之距離為10~1500mm。 The reflective virtual image display device 100 of the above-described first to fourth figures can be highly integrated into a head-mounted display device (HMD), a head-up display (HUD), or the like as a main optical element because of its simple structure. For example, it can be installed in a helmet or installed in a car dashboard as a source of display image information. In addition, the reflective virtual image display device 100 of the first to third embodiments can provide a stereoscopic three-dimensional image by changing the number of the image source 101 and the partial reflection unit 102 in addition to the two-dimensional image (for example, to form a virtual Reality or augmented reality). Moreover, the relative position, relative distance, and optical parameter optimization configuration between the image source 101, the partial reflection unit 102, the mirror 103, and the virtual image S are more tunable so that they can be applied to the near-end display device (HUD, HMD). Or remote display device (projection screen), etc. For example, the effective focal length EFL of the first surface 102a of the partial reflection unit 102 may be greater than or equal to 10 mm and less than or equal to 1000 mm; the distance between the user's eyes and the virtual image S is 250 mm to infinity; The distance between the first surface 102a of the partial reflection unit 102 and the eyes of the user is 10 to 1500 mm.
請續參照第5圖至第7圖。第5圖係繪示本新型第四實施例之反射式虛像顯示裝置100示意圖;第6圖係繪示第5圖中之反射式虛像顯示裝置100之MTF曲線圖;第7圖係繪示第5圖中之反射式虛像顯示裝置100之場曲線及歪曲曲線圖。 Please continue to refer to Figure 5 to Figure 7. 5 is a schematic diagram of a reflective virtual image display device 100 according to a fourth embodiment of the present invention; FIG. 6 is a MTF graph of the reflective virtual image display device 100 in FIG. 5; 5 is a field curve and a tortuous curve diagram of the reflective virtual image display device 100.
第5圖中繪示了應用本新型之反射式虛像顯示裝置100於形成立體三維影像的應用。此實施例與前述使用單一個影像源,搭配單一個部分反射單元102同時成像至使用者雙眼而形成二維或立體三維影像的方式不同。此實施例中,反射式虛像顯示裝置100包含二影像源101以及二部分反射單元102。二影像源101用以各別投射一投影影像。二部分反射單元102各別包含第一表面102a及第二表面102b。各第一表面102a用以接收並反射由各影像源101投射之投影影像至使用者之一單眼。於使用者之二單眼各別接受各部分反射單元102之各第一表面102a反射之投影影像後,於各第二表面102b同側看到由各投影源101所投射之投影影像訊息組合而成、具放大尺寸且呈立體三維之一虛像S。此虛像S可透過虛擬實境或擴增實境方式呈現。於此實施例中,使用者單眼對應各部分反射單元之出瞳(exit pupil)直徑大於2mm。此實施例中,部分反射單元102之第一表面102a與使用者單眼之距離為100mm,使用者單眼與虛像S之距離為550mm。以此方式配置而成之反射式虛像顯示裝置100,其光學特性如第6圖之MTF曲線圖以及第7圖之場曲線及歪曲曲線圖所示。由第6圖及第7 圖,可知此種反射式虛像顯示裝置的在虛像距離為550mm下人眼辨識能力之MTF值至少3.2lp/mm@24%,其歪曲可至小於+2%,一般光學歪曲規格為正負3%以內。故以此實施之最佳化光學參數配置下,可得到較一般規格更佳的MTF值及歪曲,故成像之解像力佳,且影像不至產生歪曲變形,可得到清晰的影像。 FIG. 5 illustrates an application of the reflective virtual image display device 100 of the present invention for forming a stereoscopic three-dimensional image. This embodiment differs from the foregoing in that a single image source is used, and a single partial reflection unit 102 is simultaneously imaged to the user's eyes to form a two-dimensional or three-dimensional three-dimensional image. In this embodiment, the reflective virtual image display device 100 includes two image sources 101 and a two-part reflection unit 102. The two image sources 101 are used to project a projection image separately. The two-part reflective unit 102 each includes a first surface 102a and a second surface 102b. Each of the first surfaces 102a is configured to receive and reflect a projected image projected by each image source 101 to a single eye of the user. After the two eyes of the user respectively receive the projection images reflected by the first surfaces 102a of the partial reflection units 102, the projected image information projected by the projection sources 101 is combined on the same side of each of the second surfaces 102b. , with a magnified size and a stereoscopic three-dimensional virtual image S. This virtual image S can be presented in a virtual reality or an augmented reality. In this embodiment, the diameter of the exit pupil of the user's single eye corresponding to each of the partial reflection units is greater than 2 mm. In this embodiment, the distance between the first surface 102a of the partial reflection unit 102 and the single eye of the user is 100 mm, and the distance between the user's single eye and the virtual image S is 550 mm. The optical image display device 100 configured in this manner has optical characteristics as shown in the MTF graph of FIG. 6 and the field curve and the warp graph of FIG. From Figure 6 and Figure 7 In the figure, it can be seen that the MTF value of the human eye recognition ability of the reflective virtual image display device is at least 3.2 lp/mm@24% at a virtual image distance of 550 mm, the distortion can be less than +2%, and the general optical distortion specification is plus or minus 3%. Within. Therefore, under the optimal optical parameter configuration, the MTF value and distortion can be obtained better than the general specifications, so that the imaging resolution is good, and the image is not deformed to obtain a clear image.
請續參照第8圖至第10圖。第8圖係繪示本新型第五實施例之反射式虛像顯示裝置100示意圖;第9圖係繪示第8圖中之反射式虛像顯示裝置100之MTF曲線圖;第10圖係繪示第8圖中之反射式虛像顯示裝置100之場曲線及歪曲曲線圖。與前述實施例中不同,此實施例係使用單一影像源101以及單一部分反射單元102而成像至使用者雙眼。為能視得完整之虛像S,使用者雙眼對應部分反射單元之眼睛盒(Eye Box)為圓形,其直徑大於60mm。於此實施例中,由於人眼出瞳直徑大約為2~8mm,因此於計算MTF值時,以眼睛盒之直徑為6mm代入即可。此實施例中,部分反射單元102之第一表面102a與使用者雙眼之距離為100mm,使用者雙眼與虛像S之距離為555mm。以此方式配置而成之反射式虛像顯示裝置100,其光學特性如第9圖之MTF曲線圖以及第10圖之場曲線及歪曲曲線圖所示。由第9圖及第10圖,可知此種反射式虛像顯示裝置的在使用者雙眼與虛像距離為555mm下人眼辨識能力之MTF值至少為3.2lp/mm@8%,其歪曲可小於+2%,一般在使用者雙眼與虛像距離為500mm下,人眼辨識能力之MTF值至少需為3.2lp/mm,光學歪曲規格為正負3%以內。故以此實 施之最佳化光學參數配置下,可得到較一般規格更佳的MTF值及歪曲,故成像之解像力佳,且影像不至產生歪曲變形,可得到清晰的影像。 Please continue to refer to Figure 8 to Figure 10. 8 is a schematic view showing a reflective virtual image display device 100 according to a fifth embodiment of the present invention; FIG. 9 is a MTF graph showing the reflective virtual image display device 100 in FIG. 8; 8 is a field curve and a tortuous curve diagram of the reflective virtual image display device 100. Unlike in the previous embodiment, this embodiment uses a single image source 101 and a single portion of the reflective unit 102 to image both eyes of the user. In order to be able to see the complete virtual image S, the eye box of the user's eyes corresponding to the partial reflection unit is circular, and its diameter is larger than 60 mm. In this embodiment, since the diameter of the human eye is about 2 to 8 mm, when the MTF value is calculated, the diameter of the eye box is 6 mm. In this embodiment, the distance between the first surface 102a of the partial reflection unit 102 and the eyes of the user is 100 mm, and the distance between the eyes of the user and the virtual image S is 555 mm. The optical image display device 100 configured in this manner has optical characteristics as shown in the MTF graph of FIG. 9 and the field curve and the warp graph of FIG. From Fig. 9 and Fig. 10, it can be seen that the MTF value of the human eye recognition ability of the reflective virtual image display device at a distance of 555 mm between the user's eyes and the virtual image is at least 3.2 lp/mm@8%, and the distortion can be less than +2%, generally when the distance between the user's eyes and the virtual image is 500mm, the MTF value of the human eye recognition ability must be at least 3.2 lp/mm, and the optical distortion specification is within plus or minus 3%. Therefore, this is true Under the optimized optical parameter configuration, the MTF value and distortion can be obtained better than the general specifications, so the image resolution is good, and the image is not deformed to obtain a clear image.
請續參照第11圖至第13圖。第11圖係繪示本新型第六實施例之反射式虛像顯示裝置100示意圖;第12圖係繪示第11圖中之反射式虛像顯示裝置100之MTF曲線圖;第13圖係繪示第11圖中之反射式虛像顯示裝置100之場曲線及歪曲曲線圖。此實施例係使用單一影像源101以及單一部分反射單元102而成像至使用者雙眼。為能視得完整之虛像S,使用者雙眼對應部分反射單元定義一眼睛盒(Eye Box)為圓形,其直徑大於60mm。於此實施例中,由於人眼出瞳直徑大約為2~8mm,因此於評價MTF值時,以眼睛盒之直徑為6mm代表之此實施例中,部分反射單元102之第一表面102a與使用者雙眼之距離為450mm,使用者雙眼與虛像S之距離為2090mm。藉此,可作為吊掛式抬頭顯示器。以此方式配置而成之反射式虛像顯示裝置100,其光學特性如第12圖之MTF曲線圖以及第13圖之場曲線及歪曲曲線圖所示。由第12圖及第13圖,可知此種反射式虛像顯示裝置的在使用者雙眼與虛像距離為450mm下人眼辨識能力之MTF值至少為0.86lp/mm@66%,其歪曲可小於+2%,一般光學歪曲規格為正負3%以內。故以此實施之最佳化光學參數配置下,可得到較一般規格更佳的MTF值及歪曲,故成像之解像力佳,且影像不至產生歪曲變形,可得到清晰的影像。 Please continue to refer to Figure 11 to Figure 13. 11 is a schematic view showing a reflective virtual image display device 100 according to a sixth embodiment of the present invention; FIG. 12 is a MTF graph showing the reflective virtual image display device 100 in FIG. 11; 11 is a field curve and a tortuous curve diagram of the reflective virtual image display device 100. This embodiment images a single image source 101 and a single portion of the reflective unit 102 to the user's eyes. In order to be able to view the complete virtual image S, the user's binocular corresponding partial reflection unit defines an eye box (Eye Box) which is circular and has a diameter greater than 60 mm. In this embodiment, since the diameter of the human eye is about 2 to 8 mm, when the MTF value is evaluated, the first surface 102a of the partial reflection unit 102 is used in the embodiment in which the diameter of the eye box is 6 mm. The distance between the eyes is 450 mm, and the distance between the user's eyes and the virtual image S is 2090 mm. Thereby, it can be used as a hanging head-up display. The optical image display device 100 configured in this manner has optical characteristics as shown in the MTF graph of Fig. 12 and the field curve and the warp graph of Fig. 13. From Fig. 12 and Fig. 13, it can be seen that the MTF value of the human eye recognition capability of the reflective virtual image display device at a distance of 450 mm between the user's eyes and the virtual image is at least 0.86 lp/mm @ 66%, and the distortion can be less than +2%, the general optical distortion specification is within plus or minus 3%. Therefore, under the optimal optical parameter configuration, the MTF value and distortion can be obtained better than the general specifications, so that the imaging resolution is good, and the image is not deformed to obtain a clear image.
請續參照第14圖至第16圖。第14圖係繪示本新型 第七實施例之反射式虛像顯示裝置100示意圖第15圖係繪示第14圖中之反射式虛像顯示裝置100之MTF曲線圖;第16圖係繪示第14圖中之反射式虛像顯示裝置100之場曲線及歪曲曲線圖。此實施例係使用單一影像源101以及單一部分反射單元102而成像至使用者雙眼。為能視得完整之虛像S,使用者雙眼對應部分反射單元定義一眼睛盒(Eye Box)為圓形,其直徑大於60mm。於此實施例中,由於人眼出瞳直徑大約為2~8mm,因此於評價MTF值時,以眼睛盒之直徑為6mm代表之此實施例中,部分反射單元102之第一表面102a與使用者雙眼之距離為1300mm,使用者雙眼與虛像S之距離為2090mm。藉此,於部分反射單元102之第一表面102a與使用者雙眼之間可設置反射鏡使光路轉折,形成可配置於汽車並看到呈二維或立體三維之虛像S之反射式虛像顯示裝置100,可作為抬頭顯示器。此實施例將反射式虛像顯示裝置100埋設於儀表板下,將影像源101之投影影像經部分反射單元102反射至一擋風玻璃。此時,於擋風玻璃表面貼附一反射膜,即可由使用者雙眼視得於擋風玻璃前之一虛像S。以此方式配置而成之反射式虛像顯示裝置100,其光學特性如第15圖之MTF曲線圖以及第16圖之場曲線及歪曲曲線圖所示。由第15圖及第16圖,可知此種反射式虛像顯示裝置的在使用者雙眼與虛像距離為2090mm下人眼辨識能力之MTF值至少為0.86lp/mm@71%,其歪曲可小於-2%。一般在使用者雙眼與虛像距離為2000mm下,人眼辨識能力之MTF值至少需為0.86lp/mm,光學歪曲規格為正負3%以內。故以此實施之最佳化光學參數配置下,可得 到較一般規格更佳的MTF值及歪曲,故成像之解像力佳,且影像不至產生歪曲變形,可得到清晰的影像。 Please continue to refer to Figures 14 through 16. Figure 14 shows the new type FIG. 15 is a view showing an MTF graph of the reflective virtual image display apparatus 100 in FIG. 14 and a 16th drawing showing a reflective virtual image display apparatus in FIG. 100 field curve and distortion curve. This embodiment images a single image source 101 and a single portion of the reflective unit 102 to the user's eyes. In order to be able to view the complete virtual image S, the user's binocular corresponding partial reflection unit defines an eye box (Eye Box) which is circular and has a diameter greater than 60 mm. In this embodiment, since the diameter of the human eye is about 2 to 8 mm, when the MTF value is evaluated, the first surface 102a of the partial reflection unit 102 is used in the embodiment in which the diameter of the eye box is 6 mm. The distance between the eyes is 1300 mm, and the distance between the user's eyes and the virtual image S is 2090 mm. Thereby, a mirror can be disposed between the first surface 102a of the partial reflection unit 102 and the eyes of the user to make the optical path turn, and a reflective virtual image display that can be disposed in the automobile and sees the virtual image S in two or three dimensions is formed. The device 100 can be used as a heads up display. In this embodiment, the reflective virtual image display device 100 is embedded under the instrument panel, and the projected image of the image source 101 is reflected by the partial reflection unit 102 to a windshield. At this time, a reflective film is attached to the surface of the windshield, so that the user can see the virtual image S in front of the windshield by both eyes. The optical image display device 100 configured in this manner has optical characteristics as shown in the MTF graph of Fig. 15 and the field curve and the warp graph of Fig. 16. From Fig. 15 and Fig. 16, it can be seen that the MTF value of the human eye recognition ability of the reflective virtual image display device is at least 0.86 lp/mm@71% under the distance between the user's eyes and the virtual image of 2090 mm, and the distortion can be less than -2%. Generally, when the distance between the user's eyes and the virtual image is 2000 mm, the MTF value of the human eye recognition ability needs to be at least 0.86 lp/mm, and the optical distortion specification is within plus or minus 3%. Therefore, under the optimized optical parameter configuration implemented by this, it is available The MTF value and distortion are better than the general specifications, so the resolution of the image is good, and the image is not deformed to obtain a clear image.
綜上,本新型的反射式虛像顯示裝置100具有簡易結構,可根據實際使用狀況,簡易地與其餘設備整合。並且,透過光學參數的最佳化,可形成成像之解像力佳,且不至歪曲變形之虛像S。本新型之反射式虛像顯示裝置100可用於形成呈二維或立體三維之虛像S,具廣泛的應用性。 In summary, the reflective virtual image display device 100 of the present invention has a simple structure and can be easily integrated with other devices according to actual use conditions. Moreover, through the optimization of the optical parameters, it is possible to form a virtual image S which is excellent in image resolution and does not distort the deformation. The reflective virtual image display device 100 of the present invention can be used to form a virtual image S in two or three dimensions, which has wide applicability.
雖然本新型已以實施方式揭露如上,然其並非用以限定本新型,因此本新型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 in the above embodiments, it is not intended to limit the present invention, and the scope of the present invention is defined by the scope of the appended claims.
100‧‧‧反射式虛像顯示裝置 100‧‧‧Reflective virtual image display device
101‧‧‧影像源 101‧‧‧Image source
102‧‧‧部分反射單元 102‧‧‧Partial reflection unit
102a‧‧‧第一表面 102a‧‧‧ first surface
102b‧‧‧第二表面 102b‧‧‧second surface
103‧‧‧反射鏡 103‧‧‧Mirror
104‧‧‧液晶顯示面板 104‧‧‧LCD panel
S‧‧‧虛像 S‧‧‧virtual image
B‧‧‧外部背景 B‧‧‧External background
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TWI609199B (en) * | 2016-06-30 | 2017-12-21 | 葉天守 | Reflective virtual image displaying device |
US20230071032A1 (en) | 2021-09-08 | 2023-03-09 | E-Lead Electronic Co., Ltd. | Head-Mounted Fixing Device |
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TWI609199B (en) * | 2016-06-30 | 2017-12-21 | 葉天守 | Reflective virtual image displaying device |
US20230071032A1 (en) | 2021-09-08 | 2023-03-09 | E-Lead Electronic Co., Ltd. | Head-Mounted Fixing Device |
US11747631B2 (en) | 2021-09-08 | 2023-09-05 | E-Lead Electronic Co., Ltd. | Head-mounted fixing device |
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