CN107561720A - Reflective virtual image display device - Google Patents
Reflective virtual image display device Download PDFInfo
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- CN107561720A CN107561720A CN201710540133.1A CN201710540133A CN107561720A CN 107561720 A CN107561720 A CN 107561720A CN 201710540133 A CN201710540133 A CN 201710540133A CN 107561720 A CN107561720 A CN 107561720A
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 230000003667 anti-reflective effect Effects 0.000 claims description 5
- 238000002310 reflectometry Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000004904 shortening Methods 0.000 claims description 4
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 35
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- 238000003384 imaging method Methods 0.000 description 3
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Abstract
The invention discloses a reflective virtual image display device, which comprises an image source and a partial reflection unit. The image source is used for projecting a projection image. The partial reflection unit comprises a first surface and a second surface. The first surface is used for receiving and reflecting the projection image projected by the image source to at least one pair of eyes of a user. At least one pair of eyes of the user penetrates through the first surface and sees a virtual image and an external background which have the same information content and enlarged size as the projected image and are two-dimensional or three-dimensional on the same side of the second surface. Wherein, the Eye Box (Eye Box) defined by the partial reflection unit corresponding to the eyes of the user is round or rectangular, if the Eye Box is round, the diameter is more than or equal to 60 mm; if the eye box is rectangular, the length is more than or equal to 60mm, and the height is more than or equal to 6 mm. Thereby, various application types can be obtained.
Description
Technical field
The present invention is on a kind of display device；Particularly say it, the present invention be can have on one kind it is a variety of applied
The reflective virtual image display apparatus of state.
Background technology
Various display devices have been that institute is required in existing daily life.Known display device shows institute with fixed mask mostly
Information is needed, such as is configured at the computer screen of computer, is configured at the control screen of various instrument and equipments or is configured at vehicular meter
Embedded screen of plate etc..Only it is based on increasingly diversified to various application demands, foregoing fixed display device is gradually not
Needed for applying.
Having developed now has the expanded application mode of various display devices.For example, the HUD for vehicle
(HUD, Head Up Display) has been found on the automobile newly sold.In addition, based on modern people to obtaining instant messages
Demand is increasingly ardent, and it has been inexorable trend that display device develops towards frivolous small direction.Existing such as google glass are small-sized
Display device has showed this miniaturization trend.Other head-mounted display apparatus (HMD, Head Mounted Display)
For popular subject under discussion in recent years.Image information can typically be presented in the display dressed on user's head by head-mounted display apparatus.
It is to be used to the helmet used in pilot increase flight safeties so as to which various information can be obtained in early days.Also have wear-type in the recent period
What display device was used for virtual reality (VR, Virtual Reality) or augmented reality (AR, Augmented Reality) should
With.It is the image information that two dimension is presented mostly in foregoing various display devices.In the recent period based on to intending true and interactive demand,
Stereoscopic three-dimensional shadow is then presented in virtual reality (VR, Virtual Reality) or augmented reality (AR, Augmented Reality)
Picture, and can have the application kenel further upgraded.
However, above-mentioned either large-scale or small-sized display device, in order to show required two dimension or stereoscopic three-dimensional shadow
As information, its optical component is still complicated, has also therefore limited to the expansible application of holographic display device.
Edge this, development with easy structure, be easy to integrate with instrument available equipment use and can present it is two-dimentional or three-dimensional three
The display device of image is tieed up, has been the improved task of top priority of holographic display device.
The content of the invention
The present invention provides a kind of reflective virtual image display dress for having easy structure and two dimension or 3-D stereoscopic image being presented
Put.By the relative position between modulation image source, part reflector element, various optical elements and the virtual image, relative distance, can obtain
Diversified it must apply kenel.Relative position between modulation image source, part reflector element, various optical elements and the virtual image,
Relative distance and the optimized configuration of optical parametric, acquisition is diversified to apply kenel.The present invention simultaneously discloses optimization light in the lump
Parameter is learned, to obtain more preferably display effect.
For the above-mentioned purpose, the present invention provides a kind of reflective virtual image display apparatus, and it includes image source and part is anti-
Penetrate unit.Image source is projecting projection image.Wherein projection image can be bidimensional image or 3-D stereoscopic image.Part is reflected
Unit includes first surface and second surface, and first surface is extremely used to receive and reflect by the projection image of image source projection
The eyes of person, the eyes of user see through first surface, and see thering is identical information with projection image in second surface homonymy
Content, up-sizing and in two dimension or stereoscopic three-dimensional the virtual image and external context.The wherein eyes corresponding part reflection of user
The glasses case (Eye Box) of unit is circular or rectangle, if glasses case (Eye Box) is circle, has a diameter larger than and is equal to
60mm；If glasses case (Eye Box) is rectangle, its length is more than or equal to 60mm, highly more than or equal to 6mm.User's
Eyes and the distance of the virtual image are more than or equal to 250mm.The first surface of part reflector element and the distance of user be 10~
1500mm.The first surface of part reflector element is concave surface and is sphere, aspherical or free form surface, its effective focal length (EFL)
More than or equal to 10mm, less than or equal to 1000mm, whereby the modulation virtual image enlargement ratio.Can on the second surface of part reflector element
It is coated with anti-reflective film.
In above-mentioned reflective virtual image display apparatus, wherein the second surface homonymy in part reflector element is equiped with liquid crystal
Show panel, it is to rotate the light penetration ratio of switching external context by liquid crystal molecule.
In above-mentioned reflective virtual image display apparatus, image source may be from liquid crystal display (LCD), digital light processing projector
(DLP), silicon based LCD projector (LCOS), organic display (OLED), mobile phone, satellite navigation system (GPS), tablet personal computer or
The projection image of camera.The reflectivity of the first surface of part reflector element is 50%~80%；It is preferred that can be 25%~80%.
In above-mentioned reflective virtual image display apparatus, also comprising at least one speculum.Speculum is changing image source institute
The projecting direction of the projection image of projection, the distance so as to shortening image source and part reflector element.
In above-mentioned reflective virtual image display apparatus, image source opposite segments reflector element has offset, and offset is more than
Equal to 0mm, less than or equal to 60mm；Preferably it is more than or equal to 0mm, less than or equal to 120mm.Image source opposite segments reflector element has
Angle is offset, deviation angle is more than or equal to 0 degree, less than or equal to 30 degree.
In another embodiment, a kind of reflective virtual image display apparatus of present invention institute, it includes two image sources and two
Individual part reflector element.Two image sources projecting projection image respectively.Each several part reflector element includes first surface and the
Two surfaces, each first surface is receiving and reflect by simple eye, the user of the projection image that each image source projects to user
Two simple eye projection images for receiving the reflection of each several part reflector element respectively after, see through each first surface, and in each second table
Face homonymy sees that the projection image projected by each projection source combines, and has up-sizing and a spatially three-dimensional virtual image and outer
Portion's background.The exit pupil diameter of the wherein any simple eye corresponding each several part reflector element of user is more than or equal to 2mm.Each several part is anti-
The first surface for penetrating unit is concave surface and is sphere, aspherical or free form surface, and its effective focal length (EFL) is more than or equal to 10mm,
Less than or equal to 1000mm, whereby the modulation virtual image enlargement ratio.Any of user simple eye with the distance of the virtual image be more than etc.
In 250mm.The first surface of each several part reflector element and any simple eye distance of user are 10~1500mm.
In above-mentioned reflective virtual image display apparatus, liquid crystal display is equiped with the second surface homonymy of each several part reflector element
Panel, it is to rotate the light penetration ratio of switching external context by liquid crystal molecule, can also install polariscope (group), electricity
Cause color-changing device or photochromic device.
In above-mentioned reflective virtual image display apparatus, the reflectivity of the first surface of each several part reflector element for 50%~
80%；Preferably 25%~80%.Anti-reflective film can be coated with the second surface of each several part reflector element.
In above-mentioned reflective virtual image display apparatus, image source may be from liquid crystal display (LCD), digital light processing projector
(DLP), silicon based LCD projector (LCOS), organic display (OLED), mobile phone, satellite navigation system (GPS), tablet personal computer or
The projection image of camera.
In above-mentioned reflective virtual image display apparatus, also comprising at least one speculum.Speculum is changing each image source
The projecting direction of the projection image projected, the distance so as to shortening each image source and each several part reflector element.
In above-mentioned reflective virtual image display apparatus, each image source has vertical offset with respect to each several part reflector element, hangs down
Straight offset is more than or equal to 0mm, less than or equal to 60mm；Preferably greater than it is equal to 0mm, less than or equal to 120mm.Each image source is relative
Each several part reflector element has deviation angle, and deviation angle is more than or equal to 0 degree, less than or equal to 30 degree.
The present invention can obtain diversified application kenel and obtain more preferably display effect compared with prior art.
Brief description of the drawings
Fig. 1 is the reflective virtual image display apparatus schematic diagram for illustrating first embodiment of the invention；
Fig. 2A is that the glasses case (Eye Box) illustrated in Fig. 1 is circular schematic diagram；
Fig. 2 B are that the glasses case (Eye Box) illustrated in Fig. 1 is rectangle schematic diagram；
Fig. 3 is the reflective virtual image display apparatus schematic diagram for illustrating second embodiment of the invention；
Fig. 4 is the reflective virtual image display apparatus schematic diagram for illustrating third embodiment of the invention；
Fig. 5 is the reflective virtual image display apparatus schematic diagram for illustrating fourth embodiment of the invention；
Fig. 6 is the MTF curve figure for illustrating the reflective virtual image display apparatus in Fig. 5；
Fig. 7 is the curvature of field and distortion curve figure for illustrating the reflective virtual image display apparatus in Fig. 5；
Fig. 8 is the reflective virtual image display apparatus schematic diagram for illustrating fifth embodiment of the invention；
Fig. 9 is the MTF curve figure for illustrating the reflective virtual image display apparatus in Fig. 8；
Figure 10 is the curvature of field and distortion curve figure for illustrating the reflective virtual image display apparatus in Fig. 8；
Figure 11 is the reflective virtual image display apparatus schematic diagram for illustrating sixth embodiment of the invention；
Figure 12 is the MTF curve figure for illustrating the reflective virtual image display apparatus in Figure 11；
Figure 13 is the curvature of field and distortion curve figure for illustrating the reflective virtual image display apparatus in Figure 11；
Figure 14 is the reflective virtual image display apparatus schematic diagram for illustrating seventh embodiment of the invention；
Figure 15 is the MTF curve figure for illustrating the reflective virtual image display apparatus in Figure 14；And
Figure 16 is the curvature of field and distortion curve figure for illustrating the reflective virtual image display apparatus in Figure 14.
Embodiment
It the following drawings illustrate multiple embodiments of the present invention.As clearly stated, the details in many practices
It will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the present invention.Also
It is to say, in section Example of the present invention, the details in these practices is non-essential.In addition, for the sake of simplifying accompanying drawing, some
Known usual structure will be illustrated in a manner of simply illustrating in the accompanying drawings with element.
It the reflective virtual image display apparatus 100 of the present invention, can reflect single according to actual state, modulation image source 101, part
Relative position, relative distance and the optimized configuration of optical parametric between member 102, various optical elements and virtual image S, obtain more
The application kenel of sample.In following paragraphs, the embodiment and application examples of a variety of reflective virtual image display apparatus 100 will be addressed,
And optimization optical parametric is disclosed in the lump, to obtain more preferably display effect.
It refer to Fig. 1.Fig. 1 is the schematic diagram of reflective virtual image display apparatus 100 for illustrating first embodiment of the invention.Reflection
Formula virtual image display apparatus 100 includes image source 101, a part of reflector element 102 and bluetooth controller 105 substantially.Image source
101 projecting projection image.In following embodiments, image source 101 comes from the projection shadow that mobile phone screen is projected
Picture.In other possible embodiments, image source 101 also may be from liquid crystal display (LCD), digital light processing projector
(DLP), silicon based LCD projector (LCOS), organic display (OLED), satellite navigation are system (GPS), tablet personal computer or camera
Projection image.Part reflector element 102 includes first surface 102a and second surface 102b.First surface 102a be concave surface and
Can be sphere, aspherical or free form surface, it is receiving and reflect by the projection image that image source 101 projects to user's
At least eyes.Now, user can be in the second surface 102b homonymies with part reflector element 102, it is seen that with projecting shadow
As there is same information content and have the virtual image S of up-sizing.The S of the modulation virtual image herein enlargement ratio can be anti-by modulation part
The effective focal length (EFL) for penetrating the first surface 102a of unit 102 obtains.Effective focal length is more than or equal to 10mm, is less than or equal to
1000mm.When effective focal length is smaller, then the larger virtual image S of enlargement ratio is can obtain, now the eyes visual angle of user is bigger.
In Fig. 1, the first surface 102a of part reflector element 102 reflectivity is 50%~80%；Preferably 25%~80%, also
That is, user's transmissive portion divides reflector element 102 to see the virtual image S before being presented in user's eyes, and simultaneously it can be seen that outside
Background B.Bluetooth controller 105 is to control operation image source 101, and user is able to operate control in a manner of bluetooth (wireless)
Image source 101 processed.
The projection image of image source 101 can be bidimensional image or 3-D stereoscopic image.When the projection image of image source 101 is
Bidimensional image, then the virtual image S in two dimension can be seen by user's eyes.When the projection image of image source 101 is 3-dimensional image, then
By user's eyes it can be seen that spatially three-dimensional virtual image S.Whereby, the naked effect regarding 3D can be formed.
In order to meet actual state, speculum 103 also can be used to change the throwing of the projection image projected by image source 101
Shadow direction, it can be seen to make projection image transfer by least eyes of user.This speculum 103 is thrown except change
Outside shadow direction, it may have the function in adjustment virtual image S directions, this is because the projection image that image source 101 is projected is through part reflection
After unit 102 reflects, the eyes of user are seen for heterochiral virtual image S., can be by void after the reflection of speculum 103
As the projection image direction identical virtual image S that S directions are become a full member, and now user sees being projected with image source 101.Not
During using speculum 103, can pre-adjust projection image that image source 101 projected (such as：Rotating mobile screen or so mirror
Conversely), now the eyes of end user can also see that virtual image S in the right direction.In addition, by the setting of speculum 103, by
In light path by transferring, it can also shorten the distance of image source 101 and part reflector element 102, to form more compact match somebody with somebody
Put and simply to integrate with other equipment.
In reflective virtual image display apparatus 100, the opposite segments reflector element 102 of image source 101 can have vertical offset,
Its value is more than or equal to 0mm, less than or equal to 60mm；Preferably greater than it is equal to 0mm, less than or equal to 120mm.Also, the phase of image source 101
To part reflector element, page 102 can have deviation angle, and its value is more than or equal to 0 degree, less than or equal to 30 degree.Modulation is above-mentioned vertical inclined
Shifting amount and the adjustable change optical path difference of deviation angle, so influence aberration (Aberration) and modulation MTF (Modulation
Transformation Function) value.This mtf value will influence the resolving power of imaging, will have more specifically in subsequent paragraph
It is bright.The other mode of aberration to be cut down is that it is disposed on image source 101 and part reflector element 102 using auxiliary optical part
Between, it is also possible to reduce the aberration of the virtual image.Auxiliary optical part can be field lens (can be sphere, aspherical, free form surface or
Fresnel Lens), water chestnut mirror (prism), micro mirror array (micro lens array), light diffuser (diffuser), full figure
Optical element (HOE).
It please continue reference picture 2A and Fig. 2 B.Fig. 2A is that the glasses case (Eye Box) illustrated in Fig. 1 is circular schematic diagram.Fig. 2 B
It is that the glasses case (Eye Box) illustrated in Fig. 1 is rectangle schematic diagram.Because reflective virtual image display apparatus 100 will be in not only
Reveal magnified image, at the same image space will human eye can comfortably at viewing, and beholder eyes up and down somewhat
The unlikely distortion or deformation for causing image when mobile.When the emergent pupil (Exit pupil) of amplifier element is too small, can not obtain complete
The visual field (FOV, Field Of View), image can be cut out or have halation.Glasses case (Eye Box) refers to eyes not
It can influence on the premise of watching image quality, transportable degree, only sufficiently large glasses case can just see complete void
As S.By in the present embodiment, being using at least eyes of the collocation user of single part reflector element 102, for that can see
Complete virtual image S, glasses case corresponding to the eyes of user (Eye Box) may be defined as circular or rectangle, if glasses case
(Eye Box) is circle, then has a diameter larger than equal to 60mm；If glasses case (Eye Box) is rectangle, its length is more than etc.
In 60mm, highly more than or equal to 6mm.
Due in the present embodiment, while can be seen in the virtual image S and external context B, Fig. 1 before being presented in user's eyes,
By installing liquid crystal display panel 104 in the second surface 102b sides of part reflector element 102, liquid crystal display panel 104 can be
Plane or arc surfaced, switching light penetration ratio can be rotated by liquid crystal molecule to change external context B light penetration ratio
Example.When liquid crystal molecule rotation switches to closed mode, then external context B light can not be by the way that now external context B can not
See, can avoid making virtual image S definition be affected because external context B is excessively bright whereby.Certainly also can the rotation of modulation liquid crystal molecule
Turn the ratio of the off/on state of switching, external context B is had different light penetration ratios according to different service conditions
Example, liquid crystal display panel 104 can be separated by a distance with the second surface 102b of part reflector element 102, or be mounted directly on
The second surface 102b of part reflector element 102, visual actual state apply it, separately can also use polariscope (group), electrochromism
Device or photochromic device.In addition, anti-reflective film can be coated with the second surface 102b of part reflector element 102, can reduce
The generation of ghost image, make virtual image S relatively sharp.
It please continue reference picture 3.Fig. 3 is the schematic diagram of reflective virtual image display apparatus 100 for illustrating second embodiment of the invention.This
Embodiment eliminates the use of speculum 103.The projection image that image source 101 is projected is the first of part reflector element 102
Surface 102a directly reflexes at least eyes of user.Now, user can be in second with part reflector element 102
Surface 102b homonymies see with projection image have same information content and have up-sizing in two dimension or stereoscopic three-dimensional void
As S.
It please continue reference picture 4.Fig. 4 is the schematic diagram of reflective virtual image display apparatus 100 for illustrating third embodiment of the invention.Before
State it is stated that speculum 103 can change the projecting direction of the projection image projected by image source 101 and virtual image S direction.
In figure 3, can according to actual use situation using multiple speculums 103 carry out multipath reflection, turning light path and shorten image
Source 101 and the distance of part reflector element 102, to reduce the volume of reflective virtual image display apparatus 100.
The projection image that image source 101 is projected can amplify through part reflector element 102 and form at least the one of user
The visual amplification virtual image S of eyes.This embodiment can be applied to the screen, embedded screen, video screen of such as desktop computer
Or motion picture screen etc..Due to being rendered as hanging virtual image S, and size and virtual image S distances can be adjusted arbitrarily, therefore may replace
The existing mode using fixed screen, the upper flexibility of tool application and the effect for reaching healthy screen.
Reflective virtual image display apparatus 100 in earlier figures 1 to Fig. 4, due to simple in construction, therefore can high integration in such as head
Formula display device (HMD), HUD (HUD), safety cap, bicycle hat, cap or glasses etc. are worn, are shown as major optical
Showing device, and can be operated with wireless (bluetooth) slide-mouse, keyboard, Trackpad, pointer, gesture induction device or remote control etc.
Virtual image display apparatus.For example, it can be installed in the helmet or be installed in fascia, as display image information
Source.Meanwhile the reflective virtual image display apparatus 100 in earlier figures 1 to Fig. 3, in addition to General Two-Dimensional image can be provided, it can also arrive
Big visual angle (the big visual field) bidimensional image (such as:Left eye is superimposed with the image of right eye), it can also change image source 101 and part is reflected
The quantity of unit 102 and obtain 3-D stereoscopic image (such as to form virtual reality or augmented reality).Also, image source 101,
Relative position, relative distance between part reflector element 102, speculum 103 and virtual image S and optical parametric is optimized matches somebody with somebody
Put, more can modulation to can apply to near-end display device (HUD, HMD) or meter displaying device (projection screen) etc..Citing and
Speech, the first surface 102a of part reflector element 102 effective focal length EFL can be more than or equal to 10mm, less than or equal to 1000mm；Make
The eyes of user are 250mm to infinity with virtual image S distance；The first surface 102a of part reflector element 102 and user
The distance of eyes is 10~1500mm.
It please continue reference picture 5 to Fig. 7.Fig. 5 is that the reflective virtual image display apparatus 100 for illustrating fourth embodiment of the invention is illustrated
Figure；Fig. 6 is the MTF curve figure for illustrating the reflective virtual image display apparatus 100 in Fig. 5；Fig. 7 is to illustrate the reflective void in Fig. 5
As the curvature of field line and distortion curve map of display device 100.
The reflective virtual image display apparatus 100 using the present invention is depicted in Fig. 5 in the application for forming 3-D stereoscopic image.
This embodiment uses single image source with foregoing, the eyes of the imaging simultaneously of collocation single part reflector element 102 to user and
The mode for forming two dimension or 3-D stereoscopic image is different.In this embodiment, reflective virtual image display apparatus 100 includes two images
Source 101 and two part reflector elements 102.Two image sources 101 projecting projection image respectively.Two parts are reflected single
Member 102 includes first surface 102a and second surface 102b respectively.Each first surface 102a is receiving and reflect by each image
The projection image that source 101 projects is simple eye to user's.Simple eye receive each several part reflector element 102 respectively at two of user
Each first surface 102a reflection projection image after, see in each second surface 102b homonymies and being projected by each image source 101
Projection image's information combination form, have up-sizing and a spatially three-dimensional virtual image S, or left eye and being superimposed for right-eye image and
Form the virtual image S at the big visual angle (the big visual field) of two dimension.This virtual image S can be presented by virtual reality or augmented reality mode.It is real herein
Apply in example, emergent pupil (exit pupil) diameter of the simple eye corresponding each several part reflector element 102 of user is more than 2mm.This embodiment
In, first surface 102a and the simple eye distance of user of part reflector element 102 are 100mm, and user is simple eye with virtual image S's
Distance is 550mm.The reflective virtual image display apparatus 100 configured in this way, its optical characteristics such as Fig. 6 MTF curve
Shown in figure and Fig. 7 curvature of field and distortion curve figure.By Fig. 6 and Fig. 7, it is known that such a reflective virtual image display apparatus 100 is in void
Image distance is from under 550mm, the mtf value at least 3.2lp/mm@24% of human eye identification capability, its distortion is smaller than+2%, typically exists
The eyes of user are that the mtf value of human eye identification capability is at least needed as 3.2lp/mm, optical distortion under 550mm with virtual image distance
Specification is within positive and negative 3%.Therefore under the optimization optical parametric implemented with this configures, it can obtain compared with general requirements more preferably MTF
Value and relatively low distortion value, therefore the resolving power being imaged is good, and image distortion is small, can obtain preferable image quality.
It please continue reference picture 8 to Figure 10.Fig. 8 is that the reflective virtual image display apparatus 100 for illustrating fifth embodiment of the invention shows
It is intended to；Fig. 9 is the MTF curve figure for illustrating the reflective virtual image display apparatus 100 in Fig. 8；Figure 10 be illustrate it is reflective in Fig. 8
The curvature of field and distortion curve figure of virtual image display apparatus 100.Different from previous embodiment, this embodiment is to use single image source
101 and single part reflector element 102 and be imaged to user at least one eyes.For complete virtual image S can be seen,
The glasses case (Eye Box) of the eyes corresponding part reflector element 102 of user is circle, has a diameter larger than 60mm.It is real herein
Apply in example, because human eye exit pupil diameter is about 2~8mm, therefore when mtf value is calculated, substituted into a diameter of 6mm of glasses case
.In this embodiment, the distance of the first surface 102a of part reflector element 102 and the eyes of user is 100mm, is used
The eyes of person and virtual image S distance are 555mm.The reflective virtual image display apparatus 100 configured in this way, its optics are special
Property is as shown in Fig. 9 MTF curve figure and Figure 10 curvature of field and distortion curve figure.By Fig. 9 and Figure 10, it is known that such a reflective void
As eyes of the display device in user are at least 3.2lp/ with virtual image distance for the mtf value of human eye identification capability under 555mm
Mm@8%, it, which distorts, is smaller than+2%, typically in the case where the eyes of user and virtual image distance are 555mm, human eye identification capability
It is within positive and negative 3% that mtf value, which is at least needed as 3.2lp/mm, optical distortion specification,.Therefore the optimization optical parametric implemented with this is matched somebody with somebody
Put down, can obtain compared with general requirements more preferably mtf value and relatively low distortion value, therefore the resolving power being imaged is good, and image distortion is small,
It can obtain preferable image quality.
It please continue reference picture 11 to Figure 13.Figure 11 is the reflective virtual image display apparatus 100 for illustrating sixth embodiment of the invention
Schematic diagram；Figure 12 is the MTF curve figure for illustrating the reflective virtual image display apparatus 100 in Figure 11；Figure 13 is illustrated in Figure 11
The curvature of field and distortion curve figure of reflective virtual image display apparatus 100.This embodiment is to use single image source 101 and single portion
Divide reflector element 102 and be imaged at least one eyes of user.For complete virtual image S, the eyes of user can be seen
Corresponding part reflector element 102 defines a glasses case (Eye Box) as circle, has a diameter larger than 60mm.In this embodiment, by
In human eye exit pupil diameter be about 2~8mm, therefore when evaluating mtf value, this implementation for being represented with a diameter of 6mm of glasses case
In example, the distances of the first surface 102a of part reflector element 102 and the eyes of user be 450mm, the eyes of user and
Virtual image S distance is 2090mm.Whereby, suspension type HUD can be used as and can be installed at car top (sunshading board).
The reflective virtual image display apparatus 100 configured in this way, its optical characteristics such as Figure 12 MTF curve figure and Figure 13's
Shown in the curvature of field and distortion curve figure.By Figure 12 and Figure 13, it is known that eyes of such a reflective virtual image display apparatus 100 in user
It is at least 0.86lp/mm@66% with virtual image distance for the mtf value of human eye identification capability under 450mm, its distortion is smaller than+2%,
Typically in the case where eyes and the virtual image distance of user is 2090mm, the mtf value of human eye identification capability is at least needed as 0.86lp/mm,
Optical distortion specification is within positive and negative 3%.Therefore under the optimization optical parametric implemented with this configures, it can obtain compared with general requirements more
Good mtf value and distortion, therefore the resolving power being imaged is good, and image distortion is small, can obtain preferable image quality.
It please continue reference picture 14 to Figure 16.Figure 14 is the reflective virtual image display apparatus 100 for illustrating seventh embodiment of the invention
Schematic diagram；Figure 15 is the MTF curve figure for illustrating the reflective virtual image display apparatus 100 in Figure 14；Figure 16 is illustrated in Figure 14
The curvature of field and distortion curve figure of reflective virtual image display apparatus 100.This embodiment is to use single image source 101 and single portion
Divide reflector element 102 and be imaged at least eyes of user.For complete virtual image S, the eyes pair of user can be seen
Answer part reflector element 102 to define glasses case (Eye Box) as circle, have a diameter larger than 60mm.In this embodiment, due to people
Eye exit pupil diameter is about 2~8mm, therefore when mtf value is evaluated, in this embodiment represented with a diameter of 6mm of glasses case,
The distance of the first surface 102a of part reflector element 102 and the eyes of user is 1300mm, eyes and the virtual image S of user
Distance be 2090mm.Whereby, can be set between the first surface 102a of part reflector element 102 and the eyes of user anti-
Penetrating mirror makes light path transfer, and is formed and is configured in automobile and sees that the reflective virtual image of the virtual image S in two dimension or stereoscopic three-dimensional is shown
Device 100, HUD can be used as.Reflective virtual image display apparatus 100 is embedded under instrument board by this embodiment, by image
The projection image in source 101 reflexes to part reflector element 102 through speculum, then reflexes at least one eyes of user.
Now, you can the virtual image S before windshield is seen by least eyes of user.With this reflective virtual image display apparatus
100, its optical characteristics is as shown in Figure 15 MTF curve figure and Figure 16 curvature of field line and distortion curve figure.By Figure 15 and Figure 16,
Such a reflective virtual image display apparatus 100 is understood in the case where the eyes of user and virtual image distance are 2090mm, human eye identification capability
Mtf value be at least 0.86lp/mm@71%, its distortion is smaller than -2%.Typically it is with virtual image distance in the eyes of user
Under 2000mm, the mtf value of human eye identification capability at least needs as 0.86lp/mm, optical distortion specification to be within positive and negative 3%.Therefore with
Under this optimization optical parametric implemented configuration, it can obtain compared with general requirements more preferably mtf value and relatively low distortion value, therefore be imaged
Resolving power it is good, and image distortion is small, can obtain preferable image quality.
To sum up, reflective virtual image display apparatus 100 of the invention has easy structure, can be according to actual use situation, letter
Change places and integrated with remaining equipment.Also, by the optimization of optical parametric, it is good to form the resolving power of imaging, and it is small to distort
Virtual image S.The reflective virtual image display apparatus 100 of the present invention can be used for being formed the virtual image S in two dimension or stereoscopic three-dimensional, and tool is extensive
Application.
Although the present invention is disclosed as above with embodiment, so it is not limited to the present invention, therefore the guarantor of the present invention
Shield scope is worked as to be defined depending on what claim was defined.
Claims (16)
1. a kind of reflective virtual image display apparatus, it is characterised in that include：
Image source, to project projection image, wherein the projection image is bidimensional image or 3-D stereoscopic image；And
Part reflector element, the part reflector element include first surface and second surface, and the first surface is receiving
And reflecting eyes by the projection image that the image source projects to user, the eyes of the user see through described the
One surface, and see that there is same information content, up-sizing and in two with the projection image in the second surface homonymy
The virtual image and the external context of dimension or stereoscopic three-dimensional；
It is circular or rectangle that the eyes of wherein described user, which correspond to the glasses case that the part reflector element defines, if described
Glasses case is circle, then has a diameter larger than equal to 60mm；If the glasses case is rectangle, its length is more than or equal to 60mm,
Highly it is more than or equal to 6mm；
The first surface of wherein described part reflector element is concave surface and is sphere or aspherical, and its effective focal length is more than etc.
In 10mm, less than or equal to 1000mm, the whereby virtual image described in modulation enlargement ratio；
The eyes of wherein described user are more than or equal to 250mm with the distance of the virtual image；
The first surface of wherein described part reflector element and the distance of user's eyes are 10~1500mm.
2. the reflective virtual image display apparatus described in 1 as mentioned, it is characterised in that described the of the part reflector element
The homonymy on two surfaces is equiped with liquid crystal display panel, and it is to switch the light of the external context by liquid crystal molecule rotation
Penetrate ratio.
3. the reflective virtual image display apparatus described in 1 as mentioned, it is characterised in that described the second of the part reflector element
Anti-reflective film is coated with surface.
4. the reflective virtual image display apparatus described in 1 as mentioned, it is characterised in that the image source comes from LCD
Plate, digital light processing projector, silicon based LCD projector, organic display, mobile phone, satellite navigation system, tablet personal computer or phase
The projection image of machine.
5. the reflective virtual image display apparatus described in 1 as mentioned, it is characterised in that described the first of the part reflector element
The reflectivity on surface is 50%~80%.
6. the reflective virtual image display apparatus described in 1 as mentioned, it is characterised in that described also comprising at least one speculum
Speculum is to change the projecting direction for the projection image that the image source is projected, so as to shortening the image source and institute
State the distance of part reflector element.
7. the reflective virtual image display apparatus described in 1 as mentioned, it is characterised in that the relatively described part reflection of the image source
Unit has vertical offset, and the vertical offset is more than or equal to 0mm, less than or equal to 60mm.
8. the reflective virtual image display apparatus described in 1 as mentioned, it is characterised in that the relatively described part reflection of the image source
Unit has deviation angle, and the deviation angle is more than or equal to 0 degree, less than or equal to 30 degree.
9. a kind of reflective virtual image display apparatus, it is characterised in that include：
Two image sources, to project projection image respectively；And
Two part reflector elements, each part reflector element include first surface and second surface, each first surface
It is simple eye to user to receive and reflect the projection image by each image source projection, two of the user
After the simple eye projection image for receiving each part reflector element reflection respectively, each first surface is seen through, and in each
The second surface homonymy sees that the projection image projected by each projection source combines, and has up-sizing and is in
The virtual image of stereoscopic three-dimensional and external context；
The exit pupil diameter of any simple eye each part reflector element of correspondence of wherein described user is more than or equal to
2mm；
The first surface of wherein each part reflector element is concave surface and is sphere or aspherical, and its effective focal length is more than
Equal to 10mm, less than or equal to 1000mm, the whereby virtual image described in modulation enlargement ratio；
Any of wherein described user is described simple eye and the distance of the virtual image is more than or equal to 250mm；
The first surface of wherein each part reflector element is with any simple eye distance of the user
10~1500mm.
10. the reflective virtual image display apparatus described in 9 as mentioned, it is characterised in that in the institute of each part reflector element
The homonymy for stating second surface is equiped with liquid crystal display panel, and it is to switch the external context by liquid crystal molecule rotation
Light penetration ratio.
11. the reflective virtual image display apparatus described in 9 as mentioned, it is characterised in that each part reflector element it is described
Anti-reflective film is coated with second surface.
12. the reflective virtual image display apparatus described in 9 as mentioned, it is characterised in that the image source from liquid crystal display,
Digital light processing projector, silicon based LCD projector, organic display, mobile phone, satellite navigation system, tablet personal computer or camera
Projection image.
13. the reflective virtual image display apparatus described in 9 as mentioned, it is characterised in that each part reflector element it is described
The reflectivity of first surface is 50%~80%.
14. the reflective virtual image display apparatus described in 9 as mentioned, it is characterised in that described also comprising at least one speculum
Speculum is to change the projecting direction for the projection image that each image source is projected, so as to shortening each image source
With the distance of each part reflector element.
15. the reflective virtual image display apparatus described in 9 as mentioned, it is characterised in that relatively each portion of each image source
Divide reflector element that there is vertical offset, the vertical offset is more than or equal to 0mm, less than or equal to 60mm.
16. the reflective virtual image display apparatus described in 9 as mentioned, it is characterised in that relatively each portion of each image source
Divide reflector element that there is deviation angle, the deviation angle is more than or equal to 0 degree, less than or equal to 30 degree.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105120839A TWI609199B (en) | 2016-06-30 | 2016-06-30 | Reflective virtual image displaying device |
| TW105120839 | 2016-06-30 |
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| CN107561720A true CN107561720A (en) | 2018-01-09 |
| CN107561720B CN107561720B (en) | 2021-02-12 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107561720B (en) | 2021-02-12 |
| TWI609199B (en) | 2017-12-21 |
| TW201800800A (en) | 2018-01-01 |
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