CN103487938B - Head-wearing display device - Google Patents
Head-wearing display device Download PDFInfo
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- CN103487938B CN103487938B CN201310380202.9A CN201310380202A CN103487938B CN 103487938 B CN103487938 B CN 103487938B CN 201310380202 A CN201310380202 A CN 201310380202A CN 103487938 B CN103487938 B CN 103487938B
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Abstract
The present invention discloses a kind of head-wearing display device, and comprise main body frame, perspective formula optical presentation system, master control system and Binocular Stereo Vision System, perspective formula optical presentation system comprises image display, optical amplification system and micro-adjusting mechanism; The object in Binocular Stereo Vision System shooting human eye front, utilizes the method that principle of parallax is found range, and obtains the distance of object to human eye; Master control system, according to the distance of the object obtained to human eye, controlling perspective formula optical presentation system and automatically adjusts the distance of the virtual image to human eye, ensureing the comfort level of user's eye when using these image displays, alleviate the visual field tired; And in augmented reality application, when the depth of field changes, automatically regulate the virtual image apart from the distance of human eye, the virtual image and actual environment are fitted, real enhancing display effect can be reached, greatly can strengthen Consumer's Experience.
Description
Technical field
The present invention relates to wearable computing and wear field of display devices, particularly relate to a kind of head-wearing display device.
Background technology
Existing HMD(HeadMountDisplay, wear-type visual device) display system of virtual reality/augmented reality, because optical presentation system is according to a fixed imaging distance design, therefore the distance of the virtual image distance human eye of image source in the display of human eye front after optical presentation system is fixing, if such HMD equipment to be used for augmented reality application, because the distance of virtual image distance human eye is constant, and residing environment is time changing, the virtual image seen by these display systems is exactly showy skyborne, depart from actual environment, not only can not reach real enhancing display effect, and Consumer's Experience extreme difference.
Summary of the invention
The object of this invention is to provide a kind of head-wearing display device, solve the existing nonadjustable defect of distance wearing display optical system virtual image distance human eye, according to the distance of object to human eye, the virtual image automatically can be regulated to the distance of human eye distance, the virtual image and actual environment better merged.
In order to realize foregoing invention object, the invention provides a kind of head-wearing display device, comprise main body frame, perspective formula optical presentation system, master control system and Binocular Stereo Vision System, perspective formula optical presentation system comprises image display, optical amplification system and micro-adjusting mechanism;
The object in Binocular Stereo Vision System shooting human eye front, utilizes the method that principle of parallax is found range, and obtains the distance of object to human eye;
Master control system is according to the distance of the object obtained to human eye, control the axial distance of micro-adjusting mechanism adjustment image display and optical amplification system, and/or control the focal length of micro-adjusting mechanism adjustment optical amplification system, make the virtual image equal the distance of object to human eye to human eye distance.
Wherein, Binocular Stereo Vision System comprises the video camera of the identical video camera of two focal lengths or a motion, and object is apart from the following formulae discovery of video camera distance Z:
Wherein, T is baseline distance, and f is focal length of camera, x
l, x
rbe respectively object through the x coordinate in left image and right image, and object is that video camera is apart from human eye distance apart from human eye distance L=Z+h, h.
Wherein, the embedded optical index computing module of described master control system, using object to the distance value of human eye as the virtual image to human eye distance value input optical index computing module, optical index computing module calculates the optical index needing adjustment automatically; The optical index that the needs calculated adjust is converted to the discernible instruction of micro-adjusting mechanism by master control system, finely tunes relevant optical to control micro-adjusting mechanism.
In the present invention, the focal length of described adjustment optical amplification system, one of two kinds of modes below can be selected:
1) position relationship of each optical element in optical amplification system is changed with micro-adjusting mechanism, to adjust the focal length of optical amplification system.
2) the one or more optical elements in described optical amplification system adopt liquid lens, and micro-adjusting mechanism changes liquid form to liquid lens impressed voltage or micro-adjusting mechanism by mechanical force, realize the focal length of adjustment optical amplification system.
Preferably, when the axial distance by adjustment image display and optical amplification system, or when adjusting the focal length of optical amplification system by the position relationship changing each optical element in optical amplification system, described micro-adjusting mechanism adopts screw thread pair transmission fine-tuning mode, each needs the optical module of movement to install one group of micro-adjusting mechanism, often organizes micro-adjusting mechanism and comprises drived control plate, micro-step motor, gear pair, rotating screw bolt, travelling nut seat; Need the optical module of movement be fixed on travelling nut seat, micro-step motor, under the driving of drived control plate, drives the rotating screw bolt in screw thread pair to rotate in gear pair mode and drives moving axially of travelling nut seat.
Compared with prior art, the present invention has following beneficial effect:
The head-wearing display device virtual image of the present invention can adjust according to the distance of object to human eye automatically apart from the distance of human eye, can ensure the comfort level of user's eye when using these image displays to greatest extent, alleviates the visual field tired; And in augmented reality application, when the depth of field changes, automatically regulate the virtual image apart from the distance of human eye, the virtual image and actual environment are fitted, real enhancing display effect can be reached, greatly can strengthen Consumer's Experience.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings:
Fig. 1 is a kind of structural representation of embodiment of the present invention head-wearing display device;
Fig. 2 is a kind of detailed construction schematic diagram of Fig. 1;
Fig. 3 is embodiment of the present invention binocular stereo vision basic principle schematic;
Fig. 4 is a kind of structural representation of perspective formula optical presentation system in embodiment of the present invention head-wearing display device;
Fig. 5 is a kind of structural representation of micro-adjusting mechanism in Fig. 4;
Mark in figure: 1-main body frame, 2-perspective formula optical presentation system, 3-Binocular Stereo Vision System, 4-master control system, 5-virtual image position, 21-image display, 22-optical amplification system, 23-micro-adjusting mechanism, the left camera of 31-, the right camera of 32-, 61-drived control plate, 62-micro-step motor, 63-gear A, 64-gear B, 65-rotating screw bolt, 66-travelling nut seat.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See the structural representation that Fig. 1, Fig. 2 are embodiment of the present invention head-wearing display device, described head-wearing display device, comprise shown in main body frame 1, perspective formula optical presentation system 2(Fig. 1,2 is that binocular wears real device, therefore have two perspective formula optical presentation systems), Binocular Stereo Vision System 3 and master control system 4, perspective formula optical presentation system 2 comprises image display 21, optical amplification system 22 and micro-adjusting mechanism 23(see Fig. 2 and 4).Binocular Stereo Vision System 3 takes the object in human eye front, utilize the method that principle of parallax is found range, obtain the distance of object to human eye, Binocular Stereo Vision System 3 can be made up of the video camera that two focal lengths are identical, also can be made up of the video camera of a motion, the Binocular Stereo Vision System shown in Fig. 2 is made up of the identical video camera 31 of focal length and video camera 32; Master control system 4 is according to the distance of the object obtained to human eye, control the axial distance that micro-adjusting mechanism 23 adjusts image display 21 and optical amplification system 22, and/or control the focal length that micro-adjusting mechanism 23 adjusts optical amplification system 22, make the virtual image equal the distance of object to human eye to human eye distance.
The vision range finding principle schematic of Binocular Stereo Vision System 3 is see Fig. 3, Binocular Stereo Vision System 3 can be made up of twin camera, also can be made up of the single camera of a motion, twin camera obtains two width digital pictures of measured object from different perspectives simultaneously, and single camera is in the two width digital pictures not obtaining measured object in the same time from different perspectives, and the three-dimensional geometric information of object is recovered based on principle of parallax, rebuild object three-dimensional contour outline and position.In Fig. 3, O
l, O
rbe respectively twice camera site before and after two video camera right position or single camera; T is baseline distance, and baseline distance T refers to the level interval of two video camera laid out in parallel, or the spacing of twice photographic subjects object before and after motion cameras; F is the focal length of two video cameras; P is object position; x
l, x
rbe respectively the x coordinate of object in left image and right image; Object is apart from the following formulae discovery of video camera distance Z:
In the present invention, object equals the distance Z+ video camera of object apart from video camera apart from human eye distance h to the distance L of human eye, and namely object is apart from the following formulae discovery of human eye distance L:
The embedded optical index computing module of embodiment of the present invention master control system 4, using object to the distance value of human eye as the virtual image to human eye distance value input optical index computing module, optical index computing module is optimized process, automatically calculates the optimum optical index needing adjustment; The optical index that the needs calculated adjust is converted to the discernible instruction of micro-adjusting mechanism by master control system, finely tunes relevant optical to control micro-adjusting mechanism.
See Fig. 4, it is a kind of structural representation of perspective formula optical presentation system in embodiment of the present invention head-wearing display device; Perspective formula optical presentation system 2 comprises image display 21, optical amplification system 22 and micro-adjusting mechanism 23, image display 21 is for Display control computer synthetic image CGI image (image source), and embodiment of the present invention image display 21 can be OLED, LCD or LCos display; Optical amplification system 22 pairs of image sources play amplification, optical combiner simultaneously in optical amplification system 22 enters the passage of human eye as the turnover of light path and external environmental light, makes human eye can observe enlarged image source and external environment by whole optical amplification system 22 simultaneously.In the diagram, the axial distance between image display 1 and optical amplification system 22 represents with L1, and the virtual image represents to the distance of human eye with L4.In embodiment of the present invention Fig. 4, only in image display 21, one group of fine tuning structure is installed, when actual design, each needs the optical module of movement all to need installation one group of micro-adjusting mechanism, and those skilled in the art with reference to the accompanying drawings 4 complete deducibilitys go out to install other accompanying drawings of many group micro-adjusting mechanisms.
In the embodiment of the present invention, the virtual image can be realized by following several mode to the adjustment of the distance L4 of human eye:
1) regulate the axial distance L1 between image display 21 and optical amplification system 22, this process entails keeps the distance of display module 21 and optical amplification system 22 in one times of focal range of optical amplification system 22;
2) focal length of optical amplification system 22 is regulated;
3) more than, two kinds of methods is combined.
Wherein, the focal length of adjustment optical amplification system 22, one of two kinds of modes below can be selected:
A. the position relationship of each optical element in optical amplification system 22 is changed with micro-adjusting mechanism 23, to adjust the focal length of optical amplification system;
B. the one or more optical elements in described optical amplification system 22 adopt liquid lens, and micro-adjusting mechanism 23 changes liquid form to liquid lens impressed voltage or micro-adjusting mechanism by mechanical force, realize the focal length of adjustment optical amplification system.
In the embodiment of the present invention, micro-adjusting mechanism 23 can be different according to demand, be designed to different structures, such as: when the embodiment of the present invention is by the axial distance of adjustment image display 21 with optical amplification system 22, or when adjusting the focal length of optical amplification system by the position relationship changing each optical element in optical amplification system 22, micro-adjusting mechanism 23 preferably adopts screw thread pair transmission fine-tuning mode, see Fig. 5, often organize micro-adjusting mechanism 23 and comprise drived control plate 61, micro-step motor 62, gear pair (gear A 63, gear B 64), rotating screw bolt 65, travelling nut seat 66, rotating screw bolt 65 and travelling nut seat 66 form screw thread pair.Need the optical module of movement be fixed on travelling nut seat 66, each needs the optical module of movement to install one group of micro-adjusting mechanism (Fig. 4 is installed on travelling nut seat 66 for image display 21), micro-step motor 62 is under the driving of drived control plate 61, drive the rotating screw bolt 65 in screw thread pair to rotate in gear pair mode and drive moving axially of travelling nut seat 66, thus drive the optical module be fixed on travelling nut seat 66 to run.
And when the present invention changes the focal length of optical amplification system by liquid lens, micro-adjusting mechanism 23 just can not with above-mentioned screw thread pair drive mechanism, and need corresponding being designed to can to liquid lens impressed voltage or the structure adding mechanical force, and now micro-adjusting mechanism be connected with optical amplification system.
Described above is each modular construction and the principle of embodiment of the present invention head-wearing display device, below, only to finely tune image display axial distance, illustrate how the embodiment of the present invention regulates the virtual image to arrive human eye distance according to the depth of field automatically, and detailed process is:
A: the object in Binocular Stereo Vision System shooting human eye front, utilizes Binocular Stereo Vision System range measurement principle, calculates the distance L4 of the virtual image to human eye;
B: according to the distance L4 of the virtual image to human eye, calculates L1 value, obtains the △ L1 data (former L1 value and the difference of L1 newly calculated) that need export, is pulse signal, and exports pulse number, umber of pulse is passed to the single-chip microcomputer on drive plate by △ L1 data transformations;
C: the Single Chip Microcomputer (SCM) program on drived control plate controls the driver of micro-step motor according to the umber of pulse obtained, and micro-step motor is stablized and turns over given step number; Moment and rotation are passed to the fine setting that fine setting screw rod realizes image display by gear pair by micro-step motor, and then realize the adjustment of the virtual image to human eye distance.
Head-wearing display device of the present invention, the virtual image can adjust according to the distance of object to human eye automatically apart from the distance of human eye, can ensure the comfort level of user's eye when using these image displays to greatest extent, alleviates the visual field tired; And in augmented reality application, when the depth of field changes, by regulating the virtual image apart from the distance of human eye, the virtual image and actual environment being fitted, real enhancing display effect can be reached, greatly can strengthen Consumer's Experience.
All features disclosed in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this instructions (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (5)
1. a head-wearing display device, is characterized in that, comprise main body frame, perspective formula optical presentation system, master control system and Binocular Stereo Vision System, perspective formula optical presentation system comprises image display, optical amplification system and micro-adjusting mechanism;
The object in Binocular Stereo Vision System shooting human eye front, utilizes the method that principle of parallax is found range, and obtains the distance of object to human eye;
Master control system is according to the distance of the object obtained to human eye, control the axial distance of micro-adjusting mechanism adjustment image display and optical amplification system, and/or control the focal length of micro-adjusting mechanism adjustment optical amplification system, make the virtual image equal the distance of object to human eye to human eye distance;
Described micro-adjusting mechanism adopts screw thread pair transmission fine-tuning mode, and each needs the optical module of movement to install one group of micro-adjusting mechanism, often organizes micro-adjusting mechanism and comprises drived control plate, micro-step motor, gear pair, rotating screw bolt, travelling nut seat; Need the optical module of movement be fixed on travelling nut seat, micro-step motor, under the driving of drived control plate, drives the rotating screw bolt in screw thread pair to rotate in gear pair mode and drives moving axially of travelling nut seat.
2. head-wearing display device as claimed in claim 1, is characterized in that, Binocular Stereo Vision System comprises the video camera of the identical video camera of two focal lengths or a motion, and object is apart from the following formulae discovery of human eye distance L:
Wherein, h is video camera distance human eye distance, and Z is object distance video camera distance, and T is baseline distance, and f is focal length of camera, x
l, x
rbe respectively the x coordinate of object in left image and right image.
3. head-wearing display device as claimed in claim 2, it is characterized in that, the focal length of described adjustment optical amplification system, comprises further: the position relationship changing each optical element in optical amplification system with micro-adjusting mechanism, to adjust the focal length of optical amplification system.
4. head-wearing display device as claimed in claim 1 or 2, it is characterized in that, one or more optical elements in described optical amplification system adopt liquid lens, micro-adjusting mechanism changes liquid form to liquid lens impressed voltage or micro-adjusting mechanism by mechanical force, realizes the focal length of adjustment optical amplification system.
5. head-wearing display device as claimed in claim 1 or 2, it is characterized in that, the embedded optical index computing module of described master control system, using object to the distance value of human eye as the virtual image to human eye distance value input optical index computing module, optical index computing module calculates the optical index needing adjustment automatically; The optical index that the needs calculated adjust is converted to the discernible instruction of micro-adjusting mechanism by master control system, finely tunes relevant optical to control micro-adjusting mechanism.
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| CN201310380202.9A CN103487938B (en) | 2013-08-28 | 2013-08-28 | Head-wearing display device |
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| CN103487938B true CN103487938B (en) | 2016-03-02 |
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