The content of the invention
The invention mainly solves the technical problem of providing a kind of adaptive holographic display methods based on viewing angle andHolographic display, can make beholder to watch clearly 3D images in any position.
In order to solve the above technical problems, one aspect of the present invention is：There is provided a kind of based on viewing angleAdaptive holography display methods, including：
The eye image of real-time tracing beholder, and the center between eyes is determined according to the eye image；
The eye image is analyzed to determine the specific location of beholder's viewpoint on the display screen；
Judge whether center between the eyes and the line of the specific location are flat with the display screenFace is vertical；And
When the plane out of plumb of the line and the display screen, reduce the conversion depth of field of the 3D rendering of display.
Wherein, it is described when the plane out of plumb of the line and the display screen, reduce turn of the 3D rendering of displayThe deep step that shifts the scenes includes：
Depth of field parameter is determined by 3D interleaving algorithms, and shows that the left and right of image regards according to the depth of field parameter changeThe offset of figure changes the depth of field to reduce the 3D of the display image.
Wherein, it is described when the plane out of plumb of the line and the display screen, reduce turn of the 3D rendering of displayFollowing steps are further included after the deep step that shifts the scenes：
Prompt message is ejected, to remind the beholder to be adjusted viewing location.
Wherein, it is described when the plane out of plumb of the line and the display screen, reduce turn of the 3D rendering of displayFollowing steps are further included after the deep step that shifts the scenes,
When the line is vertical with the plane of the display screen, increase the conversion depth of field of the 3D rendering of display.
Wherein, the eye image of the real-time tracing beholder, and determined between eyes according to the eye imageThe step of heart position, specifically includes：
Determine that eyes are believed relative to the first coordinate information of screen and the second coordinate according to the eye image trackedBreath；
Of the center between the eyes is determined according to first coordinate information and second coordinate informationThree coordinate informations.
Wherein, the line of the center judged between the eyes and the specific location whether with the displayThe step that the plane of screen is vertical specifically includes：
The center between the eyes is determined according to the coordinate information of the 3rd coordinate information and the specific locationThe line of position and the specific location judges whether the angle is 90 degree relative to the angle of the display screen plane.
In order to solve the above technical problems, another technical solution used in the present invention is：A kind of holographic display is provided,Including：Tracing module, control module and depth of field adjustment module,
The tracing module be used for real-time tracing beholder eye image, and according to the eye image determine eyes itBetween center；
The control module is used to analyze the eye image to determine the specific position of beholder's viewpoint on the display screenPut；
The control module be additionally operable to judge center between the eyes and the specific location line whetherIt is vertical with the plane of the display screen；
When the depth of field adjustment module is used for the plane out of plumb in the line and the display screen, reduce displayThe conversion depth of field of 3D rendering.
Wherein, the depth of field adjustment module is specifically used for determining depth of field parameter by 3D interleaving algorithms, and according to the scapeDeep parameter reduces the conversion depth of field of the 3D rendering of the display.
Wherein, the holographic display further includes display module, the display module be used for the line with it is describedDuring the plane out of plumb of display screen, prompt message is ejected, to remind the beholder to be adjusted viewing location.
Wherein, the depth of field adjustment module is additionally operable to when the line is vertical with the plane of the display screen, increaseThe conversion depth of field of the 3D rendering of display.
The beneficial effects of the invention are as follows：Be different from the situation of the prior art, present embodiment based on viewing angle fromThe eye image of holographic display methods real-time tracing beholder is adapted to, and the centre bit between eyes is determined according to eye imagePut；The eye image is analyzed to determine the specific location of beholder's viewpoint on the display screen, judges the center between eyesWhether the line of specific location of the position with beholder's viewpoint on the display screen is vertical with the plane of display screen；Line withDuring the plane out of plumb of display screen, reduce the conversion depth of field of the 3D rendering of display, turned by the 3D for reducing holographic displayShift the scenes depth, beholder is watched clearly 3D images in any position, increases user experience.
Embodiment
Refering to Fig. 1, Fig. 1 is the stream of depth of field adaptive display method one embodiment of the invention based on human eye viewing angleJourney schematic diagram, the adaptive display method of present embodiment include：
101：The eye image of real-time tracing beholder, and the centre bit between eyes is determined according to the eye imagePut.
Holographic display in order to the position adjustment according to human eye it is corresponding it is holographic show image, generally by camera comeObtain eye image.As shown in Fig. 2, the holographic display system of present embodiment includes holographic display 201 and camera202, wherein, camera 202 is electrically connected with holographic display 301, is used for as the front end of the holographic display 301Obtain eye image 203.Wherein, 201 position of the camera 202 in Fig. 2 and holographic display is relative position, rather thanLimit.
Wherein, holographic display 201 generally comprises common large-scale holographic display, such as 3D projectors, also includes3D intelligent mobile terminals, such as 3D smart mobile phones, as long as the device of 3D rendering can be shown, do not limit herein, cameraType does not also limit, such as the camera as 3D projectors front end, for another example front camera of smart mobile phone etc..
Specifically, holographic display determines eyes relative to the first coordinate information of screen and second according to eye imageCoordinate information, wherein, the first coordinate information and the second coordinate information are the spatial coordinated informations relative to screen, at one preferablyEmbodiment in, using screen centre position as coordinate origin, to facilitate follow-up calculating, in other embodiments, also may be usedFor coordinate origin, such as any position of screen, not limit herein elsewhere.And sat according to the first coordinate information and secondMark information determines the 3rd coordinate information of the center between beholder's eyes.
102：The eye image is analyzed to determine the specific location of beholder's viewpoint on the display screen.
In general, when the eyes of people are seen to different directions, eye has trickle change, these changes can produce canWith the feature of extraction, holographic display can extract these features by catching or scanning to eye image, so as to chase after in real timeThe change of track eyes, further determines the specific location on the display screen of beholder's viewpoint by the change of eye.It is above-mentionedTechnology is commonly referred to as eyeball tracking, and holographic display is exactly just to be analyzed by the eye image to tracking, and passes through eyeballTracer technique determines the specific location of beholder's viewpoint on the display screen.
In another embodiment, beholder's viewpoint can also be determined on the display screen by the method for infrared testSpecific location, do not limit herein.
103：Judge center between the eyes and the specific location line whether with the display screenPlane it is vertical.
Under normal circumstances, if center between beholder's eyes and beholder's viewpoint on the display screen specificThe line of position and the plane of display screen are perpendicular, as shown in Figure 3A, central point A and beholder's viewpoint between eyes 303It is optimal viewing angle when angle theta between the line and display screen 301 of specific location B on the display screen is 90 degree,Beholder can watch more clearly 3D rendering, and holographic display does not make any adjustments at this time.
Specifically, holographic display determines that the 3rd coordinate of the center A between eyes is believed in the present embodimentAfter breath, the coordinate information of the specific location B of beholder's viewpoint on the display screen is further determined that, believe further according to the coordinate of A and BBreath determines the linear equation of the straight line AB where the two line, specifically, can directly be represented by point coordinates equation, then basisThe linear equation of straight line AB determines the angle with display screen plane, and judges whether above-mentioned angle is 90 degree.
In another embodiment, the center between eyes and beholder can also be determined by other meansThe line of the specific location of viewpoint on the display screen is such as sentenced relative to the angle of the display screen plane by distanceIt is disconnected.
Holographic display detects first distance of the center between eyes relative to screen centre position, preferablyGround, holographic display detect the first distance by infrared distance measurement instrument, in other embodiments, can also pass through otherMode is detected, and is not herein limited.
104：When the plane out of plumb of the line and the display screen, reduce the conversion scape of the 3D rendering of displayIt is deep.
If the company of the center A and specific location B of beholder's viewpoint on the display screen between beholder's eyesThe plane of line and display screen 301 is not perpendicular, and as shown in Figure 3B, the central point A between eyes 303 is with beholder's viewpoint aobviousWhen angle theta between the line and display screen 301 of specific location B on display screen curtain is not 90 degree, such as less than 90 degree, in order to makeBeholder can watch the preferably holographic display effect of effect, and holographic display reduces the conversion scape of the 3D rendering of displayIt is deep.
Due to, when human eye watches object, object is imaged on eyeball by light principle, and imaging is transferred to brain,Feel the picture of object.But when object is removed, optic nerve will not disappear the impression of object immediately, and continue about 0.1The time of second, this phenomenon of human eye are referred to as the visual persistence phenomenon of eyes.
Specifically, 3D rendering is usually in units of frame, since the 3D rendering of each frame includes left and right two width notIt is alternately to play left and right image when playing 3D rendering with the picture of angle shot, accordingly, the images of left and right eyes difference of peopleCorresponding left and right image is received, when above-mentioned left eye data image and right eye data image switch in the given timeWhen, since left eye is there are persistence of vision effect, the impression of left eye data image does not disappear also, slightly poor with left eye data imageOther right eye data image occurs again, then by brain by two images integrator come the 3D visual effects realized.
Therefore, deviating to reduce the conversion depth of field of the 3D rendering for the left and right view of image can be shown by reducing,Seeing beholder must become apparent from.
Specifically, holographic display determines depth of field parameter by 3D interleaving algorithms, and according to the depth of field parameter changeThe offset of the left and right view of the display image, reduces the conversion depth of field of the 3D rendering.
The situation of the prior art is different from, the adaptive holographic display methods based on viewing angle of present embodiment is real-timeThe eye image of beholder is followed the trail of, and the center between eyes is determined according to eye image；Analyze the eye image withDetermine the specific location of beholder's viewpoint on the display screen, judge that the center between eyes is being shown with beholder's viewpointWhether the line of the specific location on screen is vertical with the plane of display screen；In the plane out of plumb of line and display screenWhen, reduce the conversion depth of field of the 3D rendering of display, the depth of field is changed by the 3D for reducing holographic display, makes beholder anyPosition can watch clearly 3D images, increase user experience.
In another embodiment, as shown in figure 4, Fig. 4 is adaptive holographic display of the present invention based on viewing angleThe structure diagram of another embodiment of method.
Difference lies in the center between eyes is with beholder's viewpoint aobvious with upper one implementation for present embodimentThe line of specific location on display screen curtain and the plane out of plumb of display screen, reduce the conversion depth of field of the 3D rendering of displayAfter step 404, further comprise step 405,
Step 405：Prompt message is ejected, to remind the beholder to be adjusted viewing location.
Specifically, holographic display ejects prompt messages such as " please adjust position " on its screen, so that user is clear and definiteThe reason for reducing the 3D conversion depth of field for showing image, allows the user to carry out its viewing location according to above-mentioned prompt message pairIt should adjust, so as to make beholder watch clear effective 3D rendering.In other embodiments, holographic displayOther prompt messages can be ejected, such as " current viewing position is improper " or other prompt messages, do not limited herein.
In addition, the adaptive display methods of the depth of field based on human eye viewing angle of present embodiment further includes step 401~404, since step 401~404 are identical with step 101~104 of a upper embodiment, referring specifically to Fig. 1 and correlationThe description of word, details are not described herein.
It is different from the situation of the prior art, the adaptive display side of the depth of field based on human eye viewing angle of present embodimentThe eye image of method real-time tracing beholder, and determine according to eye image the center between eyes；Analyze the human eyeImage judges the center between eyes and beholder's viewpoint to determine the specific location of beholder's viewpoint on the display screenWhether the line of specific location on the display screen is vertical with the plane of display screen；In the plane of line and display screen notWhen vertical, reduce the conversion depth of field of the 3D rendering of display, the depth of field is changed by the 3D for reducing holographic display, beholder is existedAny position can watch clearly 3D images, increase user experience.
Difference and a upper embodiment, the holographic display methods of present embodiment are reducing the conversion of the 3D rendering shownAfter the depth of field, further display is used for the prompt message for showing above-mentioned reason, suggesting effect is played to beholder, so that beholder's energyIt is enough that corresponding adjustment is made according to prompting message, there is clear effective 3D rendering so as to watch more, increase user experience.
In another embodiment, as shown in figure 5, Fig. 5 is that the depth of field of the invention based on human eye viewing angle is adaptiveThe another embodiment of display methods flow diagram.
The adaptive display method of present embodiment and the adaptive display method of first embodiment difference lies in,Reduce the conversion scape of display 3D rendering due to the plane out of plumb of the line and the display screen in holographic displayAfter depth, further comprise step 505.
505：When the line is vertical with the plane of the display screen, increase the conversion depth of field of the 3D rendering of display.
Holographic display does not stop the acquisition to eye image after the conversion depth of field for showing 3D rendering is reduced,And eye image is still obtained by camera in real time, and further perform and judge the center between eyes and viewingThe line of the specific location of person's viewpoint on the display screen whether the step vertical with the plane of display screen.
When the line is vertical with the plane of the display screen, the 3D rendering of holographic display increase display turnsShift the scenes depth, is allowed to return to original image display.
Specifically, holographic display determines depth of field parameter using 3D interleaving algorithms, and is increased according to the depth of field parameterThe offset of the left and right view of the display image, and then increase the conversion depth of field of the 3D rendering.
The adaptive holographic display methods based on viewing angle of present embodiment further includes step 501~504, step501~504 is identical with step 101~104 of first embodiment, referring specifically to the description of Fig. 1 and its related text,This is repeated no more.
The situation of the prior art is different from, the adaptive holographic display methods based on viewing angle of present embodiment is real-timeThe eye image of beholder is followed the trail of, and the center between eyes is determined according to eye image；Analyze the eye image withDetermine the specific location of beholder's viewpoint on the display screen, judge that the center between eyes is being shown with beholder's viewpointWhether the line of the specific location on screen is vertical with the plane of display screen；In the plane out of plumb of line and display screenWhen, reduce the conversion depth of field of the 3D rendering of display, the depth of field is changed by the 3D for reducing holographic display, makes beholder anyPosition can watch clearly 3D images, increase user experience.
First embodiment is different from, the holographic display methods of present embodiment is reducing the conversion of the 3D rendering shownAfter the depth of field, continue to follow the trail of eye image, and in the center between eyes are determined and beholder's viewpoint on the display screenSpecific location line it is vertical with the plane of display screen when, increase the conversion depth of field of the 3D rendering of display, so that display3D rendering recovers original display effect, so that enabling a viewer to watch more has clear effective 3D rendering, increases userExperience.
In another embodiment, as shown in fig. 6, Fig. 6 is adaptive holographic display of the present invention based on viewing angleThe flow diagram of method a further embodiment.
Difference lies in performing step 606 according to the people tracked to present embodiment with a upper embodimentEye pattern picture determines eyes coordinate, and the step of increase the conversion depth of field of the 3D rendering of display before, further include step 605：Pop-upPrompt message, to remind the beholder to be adjusted viewing location.
Specifically, holographic display ejects prompt messages such as " please adjust position " on its screen, so that user is clear and definiteThe reason for reducing the 3D conversion depth of field for showing image, allows the user to carry out its viewing location according to above-mentioned prompt message pairIt should adjust, so as to watch according to clear effective 3D rendering.In other embodiments, holographic display can alsoOther prompt messages are ejected, such as " current viewing position is improper " or other prompt messages, do not limited herein.
The prior art is different from, the adaptive holographic display methods based on viewing angle of present embodiment is in definite eyesBetween center and the line of the specific location of beholder's viewpoint on the display screen and the plane out of plumb of display screenWhen, reduce the conversion depth of field of the 3D rendering of display, beholder is watched clearly 3D images in any position.ReducingAfter the conversion depth of field of the 3D rendering of display, continue to follow the trail of eye image, and after eye image is tracked, according to the people trackedEye pattern picture determines eyes coordinate, and increases the conversion depth of field of the 3D rendering of display, is shown so that the 3D rendering of display recovers originalShow effect, so that enabling a viewer to watch more has clear effective 3D rendering, increase user experience.
It is different from an embodiment, the depth of field adaptive display method based on human eye viewing angle of present embodimentAfter the conversion depth of field of 3D rendering of display is reduced, further display is used for the prompt message for showing above-mentioned reason, to beholderSuggesting effect is played, to enable a viewer to make corresponding adjustment according to prompting message, is had clearly so as to watch moreEffective 3D rendering, increases user experience.
Refering to Fig. 7, Fig. 7 is the structure diagram of one embodiment of holographic display of the present invention.Present embodiment it is completeBreath display device includes tracing module 701, control module 702 and depth of field adjustment module 703.
Tracing module 701 be used for real-time tracing beholder eye image, and according to the eye image determine eyes itBetween center.For the corresponding holographic display image of the position adjustment according to human eye, general tracing module 701 passes through shootingHead obtains eye image.Generally, camera is as the front end of the holographic display, and holographic display electrical wiring,For obtaining eye image.But camera and holographic display are not limited to lifting position.
Wherein, holographic display includes common large-scale holographic display, such as 3D projectors, also including 3D intelligent slidingsDynamic terminal, such as 3D smart mobile phones, as long as the device of 3D rendering can be shown, does not limit herein, and the type of camera is not yetLimit, such as the camera as 3D projectors front end, for another example front camera of smart mobile phone etc..
Specifically, tracing module 701 determines eyes relative to the first coordinate information of screen and second according to eye imageCoordinate information, wherein, the first coordinate information and the second coordinate information are the spatial coordinated informations relative to display screen, at oneIn preferred embodiment, tracing module 701 is using screen centre position as coordinate origin, to facilitate follow-up calculating, at otherIn embodiment, it can also be elsewhere coordinate origin, such as any position of display screen, not limit herein.And according toFirst coordinate information and the second coordinate information determine the 3rd coordinate information of the center between beholder's eyes.
Control module 702 is used to analyze the eye image to determine the specific position of beholder's viewpoint on the display screenPut.
In general, when the eyes of people are seen to different directions, eye has trickle change, these changes can produce canWith the feature of extraction, holographic display can extract these features by catching or scanning to eye image, so as to chase after in real timeThe change of track eyes, further determines the specific location on the display screen of beholder's viewpoint by the change of eye.It is above-mentionedTechnology is commonly referred to as eyeball tracking, and control module 702 is exactly just to be analyzed by the eye image to tracking, and is chased after by eyeballTrack technology determines the specific location of beholder's viewpoint on the display screen.
In another embodiment, beholder's viewpoint can also be determined on the display screen by the method for infrared testSpecific location, do not limit herein.
Control module 702 is additionally operable to judge center between the eyes and beholder's viewpoint on the display screenWhether the line of specific location is vertical with the plane of the display screen.
Under normal circumstances, if center between beholder's eyes and beholder's viewpoint on the display screen specificThe line of position and the plane of display screen are perpendicular, i.e., the central point between eyes and beholder's viewpoint are on the display screenIt is optimal viewing angle, beholder is it can be seen that effect when angle between the line and display screen of specific location is 90 degreeOptimal 3D rendering, at this time holographic display do not make any adjustments.
Specifically, after tracing module 701 determines the 3rd coordinate information of the center between eyes, control module 702Further determine that the coordinate information of the specific location of beholder's viewpoint on the display screen, it is true further according to above-mentioned two coordinate informationThe linear equation of straight line where the two fixed line, specifically, can directly be represented by point coordinates equation, then according to the straight of straight lineLine equation determines the angle with display screen plane, and judges whether above-mentioned angle is 90 degree.
In another embodiment, control module 702 can also determine the center between eyes by other meansThe line of position and the specific location of beholder's viewpoint on the display screen relative to the display screen plane angle, hereinDo not limit.
When depth of field adjustment module 703 is used for the plane out of plumb in the line and the display screen, reduce displayThe conversion depth of field of 3D rendering.
If control module 702 determines center between beholder's eyes and beholder's viewpoint on the display screenThe line of specific location and the plane of display screen be not perpendicular, i.e., the central point between eyes is with beholder's viewpoint in display screenWhen angle theta between the line and display screen of specific location on curtain is not 90 degree, such as less than 90 degree, in order to enable beholderThe preferably holographic display effect of effect is enough watched, depth of field adjustment module 703 reduces the conversion depth of field of the 3D rendering of display.
Due to, when human eye watches object, object is imaged on eyeball by light principle, and imaging is transferred to brain,Feel the picture of object.But when object is removed, optic nerve will not disappear the impression of object immediately, and continue about 0.1The time of second, this phenomenon of human eye are referred to as the visual persistence phenomenon of eyes.
Specifically, 3D rendering is usually in units of frame, since the 3D rendering of each frame includes left and right two width notIt is alternately to play left and right image when playing 3D rendering with the picture of angle shot, accordingly, the images of left and right eyes difference of peopleCorresponding left and right image is received, when above-mentioned left eye data image and right eye data image switch in the given timeWhen, since left eye is there are persistence of vision effect, the impression of left eye data image does not disappear also, slightly poor with left eye data imageOther right eye data image occurs again, then by brain by two images integrator come the 3D visual effects realized.
Therefore, depth of field adjustment module 703 can reduce the 3D by reducing the offset for the left and right view for showing imageThe conversion depth of field of image, seeing beholder must become apparent from.
Specifically, depth of field adjustment module 703 determines depth of field parameter by 3D interleaving algorithms, and is changed according to the depth of field parameterBecome the offset of the left and right view of the display image, reduce the conversion depth of field of the 3D rendering.
It is different from the situation of the prior art, the eye image of the tracing module real-time tracing beholder of present embodiment, andThe center between eyes is determined according to eye image；Control module analyzes the eye image to determine that beholder's viewpoint existsSpecific location on display screen, and judge the center between eyes and the specific position of beholder's viewpoint on the display screenWhether the line put is vertical with the plane of display screen；Plane out of plumb of the depth of field adjustment module in above-mentioned line and display screenWhen, reduce the conversion depth of field of the 3D rendering of display, the depth of field is changed by the 3D for reducing holographic display, makes beholder anyPosition can watch clearly 3D images, increase user experience.
In another embodiment, tracing module is additionally operable in depth of field adjustment module due to the center between eyesReduce the 3D of display with the line of the specific location of beholder's viewpoint on the display screen and the plane out of plumb of display screenAfter the depth of field of image, continue to follow the trail of eye image.When the eye image that judgment module can be tracked according to tracing module determinesDuring eyes coordinate, depth of field adjustment module is further used for the conversion depth of field of the 3D rendering of increase display, is allowed to return to originalImage display.
Specifically, holographic display determines depth of field parameter using 3D interleaving algorithms, and is increased according to the depth of field parameterThe offset of the left and right view of the display image, and then increase the conversion depth of field of the 3D rendering.
It is different from the prior art, the center of the judgment module of present embodiment between eyes are determined is regarded with beholderDuring the plane out of plumb of the line of point specific location on the display screen and display screen, depth of field adjustment module reduces displayThe conversion depth of field of 3D rendering, changes the depth of field by the 3D for reducing holographic display, beholder is watched in any positionTo clearly 3D images, increase user experience.
First embodiment is different from, the tracing module of present embodiment reduces the 3D figures of display in depth of field adjustment moduleAfter the conversion depth of field of picture, continue to follow the trail of eye image, judgment module further determines the center between eyes according to eye imageWhether the line of specific location of the position with beholder's viewpoint on the display screen and the plane of display screen are vertical, and are determiningWhen vertical, the conversion depth of field of the 3D rendering of depth of field adjustment module increase display, so that the 3D rendering of display recovers original displayEffect, so that enabling a viewer to watch more has clear effective 3D rendering, increases user experience.
In another embodiment, referring to Fig. 8, Fig. 8 is the knot of another embodiment of holographic display of the present inventionStructure schematic diagram.The holographic display of present embodiment is except including the tracing module 801 in a upper embodiment, judging mouldOutside block 802, depth of field adjustment module 803, display module 804 is further included.
Display module 804 is used for ejecting prompt message, to remind the beholder to be adjusted viewing location.
Specifically, display module ejects prompt messages such as " please adjust position " on its screen, so that user clearly reducesThe reason for showing the 3D conversion depth of field of image, allows the user to that its viewing location is carried out according to above-mentioned prompt message to correspond to tuneIt is whole, so as to watch according to clear effective 3D rendering.In other embodiments, display module can also eject otherPrompt message, such as " current viewing position is improper " or other prompt messages, do not limit herein.
It is different from the prior art, the eye image of the tracing module real-time tracing beholder of present embodiment, and according to peopleEye pattern picture determines the center between eyes；Control module judges that the center between eyes is being shown with beholder's viewpointWhether the line of the specific location on screen is vertical with the plane of display screen；Depth of field adjustment module is in above-mentioned line and display screenDuring the plane out of plumb of curtain, reduce the conversion depth of field of the 3D rendering of display, the depth of field changed by the 3D for reducing holographic display,Beholder is watched clearly 3D images in any position, increase user experience.
An embodiment is different from, the display module of present embodiment reduces the 3D figures of display in depth of field adjustment moduleAfter the conversion depth of field of picture, further display is used for the prompt message for showing above-mentioned reason, and suggesting effect is played to beholder, so thatBeholder can make corresponding adjustment according to prompting message, have clear effective 3D rendering, increase so as to watch moreUser experience.
The foregoing is merely embodiments of the present invention, are not intended to limit the scope of the invention, every to utilize thisThe equivalent structure or equivalent flow shift that description of the invention and accompanying drawing content are made, it is relevant to be directly or indirectly used in otherTechnical field, is included within the scope of the present invention.