CN111458897B - Crosstalk quantitative estimation method of slit grating naked eye 3D display - Google Patents
Crosstalk quantitative estimation method of slit grating naked eye 3D display Download PDFInfo
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Abstract
The invention provides a crosstalk quantitative estimation method of a slit grating naked eye 3D display, which comprises the following steps of: acquiring physical parameters; acquiring an overlapping factor relation; acquiring an overlapping area; acquiring a brightness contrast curve; and (5) quantitatively acquiring crosstalk. The method, the device and the storage medium for quantitatively estimating the crosstalk of the slit grating naked-eye 3D display, provided by the invention, provide a reference method for solving the problem of the slit grating naked-eye 3D crosstalk, open a problem solving direction for visual vertigo and fatigue caused by naked-eye 3D display due to the crosstalk problem, and are greatly beneficial to the application development of the slit grating naked-eye stereoscopic display.
Description
Technical Field
The invention relates to a crosstalk quantitative estimation method of a slit grating naked eye 3D display.
Background
The slit grating naked eye 3D stereoscopic display realizes stereoscopic display through the shielding effect of slits, and the slit grating naked eye stereoscopic display based on binocular parallax enables left and right eyes to respectively see respective images through the shielding effect of the slits when the positions are correctly watched, so that stereoscopic vision is generated.
The visual vertigo feeling and fatigue feeling of the current binocular parallax naked eye 3D display are a big bottleneck, and the large-scale application field of the naked eye 3D display is influenced to a great extent. The vertigo and fatigue are caused by crosstalk, and the main cause is that the eyes are deviated from the right positions, namely, the left eyes can see partial pixel images of the right eyes or vice versa. The crosstalk of the naked eye 3D display is the key to determine the imaging quality, and the crosstalk must be controlled within 5%, otherwise serious visual fatigue is caused. It is clear that the control and cancellation of crosstalk is of particular importance and the problem that must be solved above all is that of being able to quantitatively determine and calculate crosstalk.
Disclosure of Invention
The invention is carried out to solve the problems and provides a crosstalk quantitative estimation method of a slit grating naked eye 3D display.
In order to achieve the above object, the present invention provides a method for quantitatively estimating crosstalk of a slit grating naked-eye 3D display, which has the following features:
acquiring physical parameters: acquiring the width of a sub-pixel on a display, the number of naked-eye 3D viewpoints of a slit grating when a human eye moves left and right, the interpupillary distance of the human eye and a viewing distance, and acquiring the distance between the slit grating and a liquid crystal display screen, the aperture width of the slit grating and the period of the slit grating according to a first preset rule;
acquiring an overlapping factor relation: obtaining the relation between the overlapping factor and the human eye translation distance according to the distance between the slit grating and the liquid crystal display screen and a second preset rule;
obtaining the overlapping area: in the overlapping interval of the slit projection and the pixel scanning motion caused by the human eye translation, the overlapping area of the slit projection and the pixel during the human eye translation and a first curve graph obtained based on the human eye movement distance and the overlapping area are obtained based on the relation between the overlapping factor and the human eye translation distance and a third preset rule;
obtaining a brightness contrast curve: obtaining a second curve graph of brightness change curves of two adjacent pixels seen by the same eye according to the first curve graph and the interpupillary distance of the human eyes;
and (3) crosstalk quantitative acquisition: in an overlapping region of luminance change curves of two adjacent pixels seen by the same eye, a ratio of curve height values of the two adjacent pixels seen by the same eye is taken as a crosstalk quantification.
In addition, the method for quantitatively estimating the crosstalk of the slit grating naked-eye 3D display provided by the present invention further has the following characteristics, wherein the first preset rule includes:
wherein Wp is the width of a sub-pixel on the 3D display; k is the number of slit grating naked eye 3D viewpoints when the human eyes move left and right, Q is the interpupillary distance of the human eyes, and L is the viewing distance.
In addition, the method for quantitatively estimating the crosstalk of the slit grating naked-eye 3D display provided by the invention has the characteristics that the distance D between the slit grating and the liquid crystal display screen, the aperture width Ww of the slit grating and the period Ws of the slit grating are respectively as follows:
wherein the period W of the slit gratingsIs Ww+Wb，WbThe width of the light blocking of the slit grating.
In addition, the method for quantitatively estimating the crosstalk of the slit grating naked-eye 3D display provided by the invention also has the characteristics that the second preset rule is as follows:
wherein s is the human eye translation distance, and a is the overlap factor.
In addition, the method for quantitatively estimating the crosstalk of the slit grating naked-eye 3D display provided by the invention also has the characteristics that in the step of acquiring the overlapping area: dividing the projection of the slit and the overlapping scanning motion interval of the pixel caused by the translation of the human eye into a first number of motion intervals, and obtaining the projection of the slit and each overlapping area of the pixel when the human eye translates in each motion interval according to a fourth preset rule and a first curve based on the movement distance of the human eye and the overlapping area based on the relationship between the overlapping factor and the translation distance s of the human eye and a third preset rule.
In addition, the method for quantitatively estimating the crosstalk of the slit grating naked-eye 3D display provided by the present invention further has the following characteristics, wherein the third preset rule is: the slit width is equal to the pixel width. In addition, the method for quantitatively estimating crosstalk of a slit grating naked-eye 3D display provided by the present invention further has the following characteristics, where the fourth preset rule includes: the respective overlapping areas S1、S2、S3、S4、S5Respectively as follows:
wherein, amax1Is the maximum value of the overlap factor,
fais the crosstalk period.
Action and Effect of the invention
The invention relates to a crosstalk quantitative estimation method of a slit grating naked eye 3D display, which provides a quantitative calculation path aiming at slit grating naked eye 3D display crosstalk, the overlapped areas of different positions of human eyes can be quantitatively calculated one by one, the brightness change of a certain fixed pixel seen when the human eyes move is drawn according to the overlapped areas, and the corresponding value of each position is drawn into a brightness change curve. At a certain specific position, the ratio of the brightness of the correct pixel seen by the left or right eye to the brightness of the adjacent pixel, namely the ratio of the height values of any positions of the two curves is an actual crosstalk value, and the crosstalk quantitative value of the human eye at any position can be calculated, so that the blank of slit grating naked eye 3D display on the crosstalk quantitative estimation method is effectively filled. Meanwhile, under the condition of the prior art, a reference method is provided for solving the problem of slit grating naked eye 3D crosstalk, a direction for solving the problem is opened up for visual vertigo and fatigue caused by naked eye 3D display due to the crosstalk problem, and the application development of the slit grating naked eye stereoscopic display is greatly facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a multi-viewpoint slit grating naked eye 3D display schematic diagram of a slit grating naked eye 3D display of the invention;
FIG. 2 is a schematic diagram of slit grating naked eye 3D crosstalk of the slit grating naked eye 3D display according to the present invention;
FIG. 3 is a schematic diagram illustrating a change in an overlapping area caused by scanning of a slit relative to a pixel of a slit grating naked-eye 3D display according to the present invention;
FIG. 4 is a graph of luminance variation of a pixel observed when the human eye of the slit grating naked eye 3D display of the present invention moves;
fig. 5 is a graph of luminance variation of two adjacent pixels observed when human eyes of a slit grating naked eye 3D display of the invention move.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The present invention relates to a method, an apparatus and a storage device for quantitatively estimating crosstalk of a slit grating naked-eye 3D display, which are described in detail below with reference to the accompanying drawings and embodiments. The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The invention provides a quantitative estimation method for slit grating naked eye 3D display crosstalk, which comprises the following steps: :
acquiring physical parameters: obtaining the width W of a sub-pixel on a displaypNarrow slit for human eyes moving left and rightThe number K of naked eye 3D viewpoints of the grating, the interpupillary distance Q of human eyes and the viewing distance L are obtained, and the distance D between the slit grating and the liquid crystal display screen and the aperture width W of the slit grating are obtained according to a first preset rulewAnd the period W of the slit gratings。
Fig. 1 is a multi-viewpoint slit grating naked eye 3D display schematic diagram of the slit grating naked eye 3D display of the present invention.
As shown in fig. 1, the black slit grating is located in front of the display, the slit grating has fine light-transmitting slits, and through the shielding effect of the black stripes on the slit grating, the left eye of the viewer sees only left-eye pixels (black) through the slits on the grating, the right eye sees only right-eye pixels (white), and the black and white columns respectively display images at different left and right viewing angles, thereby generating stereoscopic vision.
More specifically, in the electronic apparatus of the present invention, the first preset rule includes:
wherein, WpIs the width of a sub-pixel on a 3D display; k is the number of slit grating naked eye 3D viewpoints when the human eyes move left and right, Q is the interpupillary distance of the human eyes, and L is the viewing distance.
In some embodiments, the slit grating is manufactured by using a laser engraving technology, and in order to more intuitively reflect a crosstalk quantitative estimation method of a slit grating naked eye 3D display, a double-viewpoint displayed by the slit grating naked eye 3D is selected as a description object, that is, when a human eye moves left and right, the number K of slit grating naked eye 3D viewpoints is 2. The RGB sub-pixel width on the 3D display is ≈ 0.0682mm, the interpupillary distance Q of the human eye is 65 mm, and the viewing distance L is 500 mm.
Further, the distance D between the slit grating and the liquid crystal display screen and the aperture width W of the slit gratingwAnd the period Ws of the slit grating is respectively:
wherein the period W of the slit gratingsIs Ww+Wb，WbThe width of the light blocking of the slit grating.
In some embodiments, the aperture width W of the slit grating is obtained according to equation (1)w0.0681 mm, period WsThe distance D between the slit grating and the liquid crystal display screen is 0.5241mm, which is 0.2725 mm. More specifically, under the premise of double visual points, the resolution of the liquid crystal display screen is 1440 x 900mm2(ii) a At this time, the pixel width WpIs 0.2835 mm.
Acquiring an overlapping factor relation: and obtaining the relation between the overlapping factor and the human eye translation distance s according to the distance D between the slit grating and the liquid crystal display screen and a second preset rule.
Fig. 2 is a schematic diagram of slit grating naked-eye 3D crosstalk of the slit grating naked-eye 3D display of the present invention. As shown in fig. 2, the projection of the slit overlaps a certain pixel, and the overlap factor a will be proportional to the crosstalk. The second preset rule is as follows:
wherein s is the human eye translation distance, and a is the overlap factor.
In some embodiments, D-0.5241 mm and L-500 mm, then
Obtaining the overlapping area: in the overlapping interval of the slit projection and the pixel scanning motion caused by the human eye translation, the overlapping area of the slit projection and the pixel during the human eye translation and a first curve graph obtained based on the human eye movement distance and the overlapping area are obtained based on the relation between the overlapping factor and the human eye translation distance s and a third preset rule.
Fig. 3 is a schematic diagram of the change of the overlapping area caused by the slit relative to the pixel scanning of the slit grating naked-eye 3D display of the present invention.
In order to quantitatively calculate the crosstalk, rays are taken from the center of the pupil of the human eye through the edges of the slit, and the slit is projected to the liquid crystal screen. As shown in fig. 3, when the human eye moves left and right, the projection of the slit scans the pixels in opposite directions, and the larger the overlapping area of the projection of the slit and a certain pixel is, the higher the brightness of the pixel is seen by the human eye. Therefore, the size of the crosstalk can be quantitatively and indirectly calculated through the overlapping area of the slit and the pixel.
Fig. 4 is a graph of luminance variation of a certain pixel observed when human eyes of the slit grating naked eye 3D display of the present invention move.
More specifically, in the overlapping area acquiring step: dividing the projection of the slit and the overlapping scanning motion interval of the pixel caused by the translation of the human eye into a first number of motion intervals, obtaining each overlapping area of the projection of the slit and the pixel when the human eye translates in each motion interval based on the relationship between the overlapping factor and the translation distance s of the human eye and a third preset rule, and obtaining a first curve based on the movement distance and the overlapping area of the human eye, as shown in fig. 3.
In some embodiments, 5 positions during the movement of the human eye are set as points for a particular calculation. Namely, the projection of the slit and the overlapping scanning motion section of the pixel caused by the translation of the human eye are divided into 5 motion sections (C1, C2, C3, C4 and C5), and based on the relationship between the overlapping factor a and the translation distance s of the human eye and a third preset rule, the projection of the slit and each overlapping area of the pixel during the translation of the human eye in each motion section are obtained according to a fourth preset rule, and a first curve based on the movement distance and the overlapping area of the human eye is obtained.
As shown in fig. 3, in order to calculate the overlap area, the projection (parallelogram) of the slit with respect to the scanning motion of the pixel (rectangle) is divided into 5 sections (C1, C2, C3, C4, C5), and the overlap area S corresponding to each section (C1, C2, C3, C4, C5) is calculated by combining the above-mentioned relationship between a and S according to equations (1) and (2)1、S2、S3、S4、S5Can be respectively and quantitatively calculated to obtain the overlapping areas of 5 different stages.
Wherein, in order to suppress the influence of moire, the slits are obliquely disposed with respect to the pixel deflection by 18 degrees; to simplify the calculation, since D is much smaller than L, the slit width is equal to the pixel width according to a third preset rule, so that the slit width is approximately equal to the pixel width.
In addition, the fourth preset rule includes: the respective overlapping areas S1、S2、S3、S4、S5Respectively as follows:
wherein, amax1Is the maximum value of the overlap factor, faIs the crosstalk period.
The maximum value of the overlap factor can be obtained according to equation (2) when the human eye translation distance is maximum. The crosstalk period is a fixed quantity determined according to the moving speed of human eyes
Meanwhile, according to the obtained area value of the overlapping area, the human eye movement distance is taken as an abscissa, and the overlapping area is taken as an ordinate, so that a first curve graph of the brightness change of a certain fixed pixel seen when the human eyes move is obtained. As shown in fig. 4, the luminance curve segments corresponding to 5 small regions corresponding to 5 different stages are marked.
Obtaining a brightness contrast curve: obtaining a second curve graph of brightness change curves of two adjacent pixels seen by the same eye according to the first curve graph and the interpupillary distance of the human eyes;
fig. 5 is a graph of luminance variation of two adjacent pixels observed when human eyes of a slit grating naked eye 3D display of the invention move.
As shown in fig. 5, the luminance change curve (solid line curve in fig. 5) is shifted by one pupil distance (the peak position at this time represents that the same eye will just see the adjacent pixels), and another curve (broken line curve in fig. 5, the luminance change curve of the adjacent two pixels seen by the same eye, is obtained, thereby obtaining a second graph.
And (3) crosstalk quantitative acquisition: in the overlapping area of the luminance variation curves of two adjacent pixels seen by the same eye, the ratio of the curve height values of the two adjacent pixels seen by the same eye (i.e., the correct pixel to the adjacent pixel) is taken as a crosstalk quantification.
As shown in fig. 5, the two curves respectively correspond to the luminance variations of two adjacent pixels seen by the same eye, and it can be seen from the figure that the luminance is lower the farther the left or right eye is deviated from the peak position (i.e., the correct viewing position). In the overlapping region O of the luminance variation curves of two adjacent pixels seen by the same eye, the ratio of the luminance of the correct pixel seen by the same eye to the curve height value of the adjacent pixel is the crosstalk quantification. As shown in fig. 5, in the overlap region O, the line X intersects with two curves respectively to obtain two different height values (as shown by the height values corresponding to the two horizontal dashed lines in the figure), and the ratio of the intersection height of the solid curve to the height of the dashed curve is the crosstalk quantification at this time.
Effects and effects of the embodiments
According to the crosstalk quantitative estimation method of the slit grating naked eye 3D display related in the embodiment, a quantitative calculation path for slit grating naked eye 3D display crosstalk is provided, the overlapped areas of different positions of human eyes can be quantitatively calculated one by one, the brightness change of a certain fixed pixel seen when the human eyes move is drawn according to the overlapped areas, and the corresponding value of each position is drawn into a brightness change curve. At a certain specific position, the ratio of the brightness of the correct pixel seen by the left or right eye to the brightness of the adjacent pixel, namely the ratio of the height values of any positions of the two curves is an actual crosstalk value, and the crosstalk quantitative value of the human eye at any position can be calculated, so that the blank of slit grating naked eye 3D display on the crosstalk quantitative estimation method is effectively filled. Meanwhile, under the condition of the prior art, a reference method is provided for solving the problem of slit grating naked eye 3D crosstalk, a direction for solving the problem is opened up for visual vertigo and fatigue caused by naked eye 3D display due to the crosstalk problem, and the application development of the slit grating naked eye stereoscopic display is greatly facilitated.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (3)
1. A crosstalk quantitative estimation method of a slit grating naked eye 3D display is characterized by comprising the following steps:
acquiring physical parameters: acquiring the width of a sub-pixel on a display, the number of naked-eye 3D viewpoints of a slit grating when a human eye moves left and right, the interpupillary distance of the human eye and a viewing distance, and acquiring the distance between the slit grating and a liquid crystal display screen, the aperture width of the slit grating and the period of the slit grating according to a first preset rule;
acquiring an overlapping factor relation: obtaining the relation between the overlapping factor and the human eye translation distance according to the distance between the slit grating and the liquid crystal display screen and a second preset rule;
obtaining the overlapping area: in the overlapping interval of the slit projection and the pixel scanning motion caused by the human eye translation, the overlapping area of the slit projection and the pixel during the human eye translation and a first curve graph obtained based on the human eye movement distance and the overlapping area are obtained based on the relation between the overlapping factor and the human eye translation distance and a third preset rule;
obtaining a brightness contrast curve: obtaining a second curve graph of brightness change curves of two adjacent pixels seen by the same eye according to the first curve graph and the interpupillary distance of the human eyes;
and (3) crosstalk quantitative acquisition: in an overlapping area of brightness change curves of two adjacent pixels seen by the same eye, taking the ratio of curve height values of the two adjacent pixels seen by the same eye as crosstalk quantification;
wherein the first preset rule comprises:
Wpis the width of a sub-pixel on a 3D display;
k is the number of slit grating naked eye 3D viewpoints when the human eyes move left and right,
q is the interpupillary distance of the human eye,
l is the viewing distance,
d is the distance between the slit grating and the liquid crystal display screen,
Wwis the aperture width W of the slit gratingw
WsThe period of the slit grating;
the second preset rule is:
s is the translation distance of the human eye, and a is an overlapping factor;
the third preset rule is as follows: aperture width W of the slit gratingwAnd width W of pixelpAre equal.
2. The method for quantitatively estimating the crosstalk of the slit grating naked-eye 3D display according to claim 1, wherein the method is characterized in thatThe distance D between the slit grating and the liquid crystal display screen and the aperture width W of the slit gratingwAnd the period W of the slit gratingsRespectively as follows:
wherein the period W of the slit gratingsIs Ww+Wb，WbThe width of the light blocking of the slit grating.
3. The method for quantitatively estimating the crosstalk of the slit grating naked-eye 3D display according to claim 1, wherein in the step of obtaining the overlapping area: dividing the projection of the slit and the overlapping scanning motion interval of the pixel caused by the translation of the human eye into a first number of motion intervals, and obtaining the projection of the slit and each overlapping area of the pixel when the human eye translates in each motion interval and a first curve based on the movement distance of the human eye and the overlapping area according to a fourth preset rule based on the relation between the overlapping factor and the translation distance of the human eye and a third preset rule;
the fourth preset rule includes: the scanning motion of the projection of the slit relative to the pixels is divided into 5 sections C1, C2, C3, C4, and C5, and the overlapping areas corresponding to each of the sections C1, C2, C3, C4, and C5 are S1、S2、S3、S4、S5(ii) a The respective overlapping areas S1、S2、S3、S4、S5Respectively as follows:
wherein, amax1Is the maximum value of the overlap factor,
fais the crosstalk period.
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| US20160232825A1 (en) * | 2015-02-11 | 2016-08-11 | Boe Technology Group Co., Ltd. | 3d display device and driving method thereof |
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