CN102331626A - Stereo display - Google Patents

Abstract

The invention provides a stereo display which comprises a display and a cylindrical lens raster, wherein the display is used for displaying disparity images; the cylindrical lens raster and the display are arranged at a preset interval; the cylindrical lens raster comprises a plurality of cylindrical lenses; and the curvature of each pillar lens continuously changes from the center of the cylindrical lens to the edge of the cylindrical lens. The stereo display provided by the invention has the advantage of small image crosstalk.

Description

3 d display device

Technical field

The present invention relates to stereo display technique, be meant a kind of 3 d display device especially.

Background technology

Sphere post lenticulation three-dimensional display based on binocular parallax is made up of flat-panel monitor and the spheric grating that is arranged on the flat-panel monitor, and this three-dimensional display has a plurality of independently viewpoints, on different viewpoints, can observe different pictures.The displaying contents of three-dimensional display comes from the image of Same Scene being taken from a plurality of directions, and each viewpoint shows the image that direction photographs.Under the perfect condition, be fully independently between the viewpoint, the display image (being disparity map) between any two viewpoints that the beholder sees does not have crosstalks.In fact, this perfect condition is non-existent, and the display image between each viewpoint exists crosstalks, and this stereo-picture that makes the beholder see is fuzzy, and viewing effect is not good.

As shown in Figure 1; The width of a sphere post lenticulation 1 in the sphere post lenticulation three-dimensional display equals the width of n subpixels 2 of the colored filter (claiming color membrane substrates again) of flat-panel monitor; Bore hole stereo display is that the backlight of flat-panel monitor two width of cloth images with parallax that two viewpoints are corresponding respectively are refracted in beholder's the right and left eyes through colored filter and sphere post lenticulation; Wherein 3 are the light behind the backlight process colored filter of flat-panel monitor; This light 3 obtains light 4 after being incident to sphere post lenticulation 1, then in the directive beholder eye; Thereby let the beholder can see the image that each viewpoint is corresponding, thereby form stereoscopic vision.

Existing this sphere post lenticulation 1 is because the surface is a sphere, and emergent light 3 directions of flat-panel monitor are therefore each is to scattering; Sphere post lenticulation 1 has spherical aberration for the light in different apertures; For marginal ray coma, astigmatism etc. are arranged, these optical image missionary societies make the light of piece image arrive the another one image-region through the laggard row of superrefraction, form crosstalking between image; Cause the stereoscopic vision variation, make the beholder symptoms such as dizzy occur.

Summary of the invention

The technical matters that the present invention will solve provides a kind of 3 d display device, can reduce the picture crosstalk of this 3 d display device.

For solving the problems of the technologies described above, embodiments of the invention provide a kind of 3 d display device, comprising: show the display of disparity map, and preset the post lenticulation that spacing is provided with said display with one;

Said post lenticulation comprises a plurality of post lens, and the curvature of each post lens changes from the lens center to the rims of the lens continuously.

Wherein, arrange the said disparity map of demonstration according to a predetermined period interpolation on the display screen of said display.

Wherein, said a plurality of post lens are arranged to a grating array according to preset pitch.

Wherein, the disparity map of the corresponding said predetermined period of each post lens in the said grating array.

Wherein, said disparity map comprises: left and right two width of cloth have the image of parallax.

Wherein, said preset spacing is the focal length of lens of said lens center to the curvature continually varying post lens of rims of the lens.

Wherein, said lens center is confirmed by following formula to the surface type of the curvature continually varying post lens of rims of the lens:

$z=\frac{{\mathrm{<figure-callout\; id="2"\; label="cr"\; filenames="HDA0000093926080000011.png"\; state="\{\{state\}\}">cr</figure-callout>}}^2}{1+\sqrt{1-(1+k){\mathrm{<figure-callout\; id="2r"\; label="c"\; filenames="HDA0000093926080000022.png"\; state="\{\{state\}\}">c</figure-callout>}}^2{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000093926080000011.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}}+{\mathrm{\&alpha;}}_1{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000093926080000011.png"\; state="\{\{state\}\}">r</figure-callout>}}^2+{\mathrm{\&alpha;}}_2{\mathrm{<figure-callout\; id="4"\; label="r"\; filenames="HDA0000093926080000011.png"\; state="\{\{state\}\}">r</figure-callout>}}^4+{\mathrm{\&alpha;}}_3{r}^6{+\mathrm{\&alpha;}}_4{r}^8+{\mathrm{\&alpha;}}_5{\mathrm{<figure-callout\; id="10"\; label="r"\; filenames="HDA0000093926080000021.png,HDA0000093926080000022.png"\; state="\{\{state\}\}">r</figure-callout>}}^{10}+{\mathrm{\&alpha;}}_6{\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="HDA0000093926080000022.png"\; state="\{\{state\}\}">r</figure-callout>}}^{12}+{\mathrm{\&alpha;}}_7{\mathrm{<figure-callout\; id="14"\; label="r"\; filenames="HDA0000093926080000022.png"\; state="\{\{state\}\}">r</figure-callout>}}^{14}+{\mathrm{\&alpha;}}_8{r}^{16}$

Wherein, z is the lens surface rise, and c is the curvature that rims of the lens is arrived in the lens center, and r is to be the radial coordinate of unit with length of lens unit, and k is the circular cone coefficient, α ₁-α ₈Be surface type coefficient.

Wherein, have a transparent medium between the display screen of said post lenticulation and said display, the thickness of said transparent medium equals said preset spacing.

Wherein, said post lenticulation is to be processed by liquid crystal material.

Wherein, the surface of said post lenticulation has the UV glue-line.

The beneficial effect of technique scheme of the present invention is following:

In the such scheme; Through adopting the grating of lens center to the curvature continually varying post lens formation of rims of the lens; The image that will have parallax is refracted to beholder's right and left eyes respectively; Aberration that can visual field, edge, better optimize large aperture, thus the aberration of display all angles scattered light can be reduced, and then the crosstalking of image when reducing stereo display.

Description of drawings

Fig. 1 is the grating part synoptic diagram of existing sphere post lenticulation three-dimensional display;

Fig. 2 is the grating part synoptic diagram of 3 d display device of the present invention;

Fig. 3 is the concrete implementation structure synoptic diagram of grating part shown in Figure 2.

Embodiment

For technical matters, technical scheme and advantage that the present invention will be solved is clearer, will combine accompanying drawing and specific embodiment to be described in detail below.

As shown in Figure 2, one embodiment of the invention, 3 d display device comprises: show the display 10 of parallax Figure 101, and preset the post lenticulation 11 that spacing is provided with display 10 with one; Post lenticulation 11 comprises a plurality of post lens, and the curvature of each post lens changes from the lens center to the rims of the lens continuously.Wherein, this each lens center is commonly referred to non-spherical lens to the curvature continually varying lens of rims of the lens at optical field, and therefore, above-mentioned post lenticulation 11 can be called as aspheric surface post lenticulation 11; This lens center can be confirmed by following formula to the surface type of the curvature continually varying post lens of rims of the lens:

$z=\frac{{\mathrm{<figure-callout\; id="2"\; label="cr"\; filenames="HDA0000093926080000011.png"\; state="\{\{state\}\}">cr</figure-callout>}}^2}{1+\sqrt{1-(1+k){\mathrm{<figure-callout\; id="2r"\; label="c"\; filenames="HDA0000093926080000022.png"\; state="\{\{state\}\}">c</figure-callout>}}^2{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000093926080000011.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}}+{\mathrm{\&alpha;}}_1{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000093926080000011.png"\; state="\{\{state\}\}">r</figure-callout>}}^2+{\mathrm{\&alpha;}}_2{\mathrm{<figure-callout\; id="4"\; label="r"\; filenames="HDA0000093926080000011.png"\; state="\{\{state\}\}">r</figure-callout>}}^4+{\mathrm{\&alpha;}}_3{r}^6{+\mathrm{\&alpha;}}_4{r}^8+{\mathrm{\&alpha;}}_5{\mathrm{<figure-callout\; id="10"\; label="r"\; filenames="HDA0000093926080000021.png,HDA0000093926080000022.png"\; state="\{\{state\}\}">r</figure-callout>}}^{10}+{\mathrm{\&alpha;}}_6{\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="HDA0000093926080000022.png"\; state="\{\{state\}\}">r</figure-callout>}}^{12}+{\mathrm{\&alpha;}}_7{\mathrm{<figure-callout\; id="14"\; label="r"\; filenames="HDA0000093926080000022.png"\; state="\{\{state\}\}">r</figure-callout>}}^{14}+{\mathrm{\&alpha;}}_8{r}^{16}$

Wherein, z is lens surface rise (height z as shown in Figure 3), and c is the curvature that rims of the lens is arrived in the lens center, and r is to be the radial coordinate (r as shown in Figure 3) of unit with length of lens unit, and k is the circular cone coefficient, α ₁-α ₈Be surface type coefficient.Can obtain through the coupling experiment, when the surface of these aspheric surface post lens was hyperbolic curve, the value of circular cone coefficient k was greater than 1; When the surface of these aspheric surface post lens was para-curve, the value of circular cone coefficient k was 1; When the surface of these aspheric surface post lens was ellipse, the value of circular cone coefficient k was between 0 to 1.

As shown in Figure 2 again; In the display 10 of above-mentioned 3 d display device; This parallax Figure 101 arranges according to a predetermined period interpolation on the display screen of display 10; Comprise that like parallax Figure 101 left figure L, right figure R two width of cloth have the image of parallax, in this current predetermined period, the image that this left figure L, right figure R two width of cloth have parallax is arranged in together; In the next predetermined period, the image that left figure L, right figure R two width of cloth have parallax is arranged in together; On the display screen of display 10, form left and right, left and right like this ... the Pareto diagram picture.

In addition, above-mentioned a plurality of lens centers are arranged to a grating array to the curvature continually varying post lens (being the aspheric surface post lens in the embodiments of the invention) of rims of the lens according to preset pitch, i.e. aspheric surface post lenticulation;

Pareto diagram picture on the display screen of aforementioned display device 10 with the relation that is provided with of this grating array is: the disparity map of the corresponding above-mentioned predetermined period of each post lens in this grating array;

As shown in Figure 2; The left figure L that the back light of display 10 sends through colored filter (being expressed as the display screen of display in the drawings), the light of right figure R two width of cloth images are refracted to left figure L and right figure R in the viewing areas apart from aspheric surface post lenticulation 11h place respectively through the refraction of aspheric surface post lenticulation 11; This viewing areas comprises: the viewing areas L of left figure L and the viewing areas R of right figure R, represent with diagonal line hatches among the figure.

The only all angles scattering that display 10 sends; Choose the left figure L in each predetermined period, three chief rays of right figure R are analyzed, the light c at the light b of the intersection of the light a at left figure L edge as shown in the figure, left figure L and right figure R and the edge of right figure R; Left figure L on the display screen in all predetermined period maps to viewing areas through the aspheric surface post lenticulation 11 in the embodiments of the invention, and all right figure R also map to viewing areas;

Because the aberration of this aspheric surface post lenticulation is little; So left figure L on the display screen, when right figure R maps in the viewing areas through this aspheric surface post lenticulation; All left figure L all map to the left viewing areas L like figure bend shadow representation, and all right figure R all map to the right viewing areas R like figure bend shadow representation; Almost do not have left figure L to map to the phenomenon that viewing areas R or right figure R map to viewing areas L, form the viewing areas that above-mentioned left figure L, right figure R do not crosstalk;

But the light of other angle and direction also can be via aspheric post lenticulation refraction; That is to say; The point of other visual field and the light of other angle; The visual angle-20 ° watched according to general display device selects for use aspheric surface post lenticulation 11 to be optimized to 20 °, should-20 ° to 20 ° the aberration of all light in visual angles make it relative sphere post lenticulation and make moderate progress, thereby reduce crosstalking of bore hole stereoscopic display device.

In the above embodiment of the present invention, the aspheric surface post lenticulation 11 that is provided with a preset spacing with display 10 is the focal length of lens f of this aspheric surface post lenticulation 11 to the preset spacing of this display 10.Between two dotted lines as shown in Figure 2 apart from f.

As shown in Figure 3; In another embodiment of the present invention; When this 3 d display device is specifically realized; Have a transparent medium 12 between the display screen of above-mentioned post lenticulation 11 (being aspheric surface post lenticulation) and display 10, the thickness of this transparent medium 12 equals above-mentioned preset spacing f, thereby the distance that limits between display 10 and the post lenticulation 11 is preset spacing f.The refractive index of this transparent medium 12 is preferably 1.515, this transparent medium 12 as can be glass; Above-mentioned post lenticulation 11 (being aspheric surface post lenticulation) is by processing according to the liquid crystal material of certain predetermined direction orientation, and the refractive index of this liquid crystal material is preferably 1.65; Can certainly select for use other light transmissive material to process.Wherein, 13 indicated parts among the figure are the surface curve of the aspheric surface post lenticulation 11 in the embodiments of the invention.

Further; The surface of above-mentioned post lenticulation 11 (being aspheric surface post lenticulation) has UV glue-line 14; Preferably, the groove shape of the structure of this UV glue-line 14 shown in figure filled above-mentioned liquid crystal material in the UV glue-line 14 of this groove shape; Thereby form the aspheric surface post lenticulation of being processed by this liquid crystal material 11, the refractive index of this UV glue-line 14 is preferably 1.52; UV glue is that a type of solidifying through ultraviolet light irradiation is gluing; The 15 indicated directions of arrow shown in Fig. 3 are view direction.

Be the concrete realization of example explanation the foregoing description below with concrete display:

If is 0.1695mm with the point of the display screen of display apart from (point apart from be the distance between adjacent two pixels), viewing distance 45cm, the pitch of designing and aspheric surface post lenticulation 11 is 0.248mm.The light that a bit sends arbitrarily of display 10 is 1.515 transparent medium 12 through refractive index, and injects by refractive index through this transparent medium 12 and to equal the aspheric surface post lenticulation 11 that 1.65 liquid crystal is processed, and to get into refractive index be 1.52UV glue-line 14 in refraction then; Be that 1 air layer gets into beholder's eyes through refractive index at last.

In the present embodiment, the optical parametric of aspheric surface post lens can be visual field: ± 10 °; R=0.183085=1/c; Circular cone coefficient k=-1.0002; Asphericity coefficient is only selected the quadravalence alpha for use ₄=3; These aspheric surface post lenticulation 11 better controlled optical aberration; Wherein, under 0 visual field, the stigma of pixel minimum is 5um, and ± 10 ° stigma is in 11.6um, and the stigma of sphere post lenticulation is basically all more than 10um;

It is thus clear that; The aspheric surface post lenticulation 11 that adopts in the embodiments of the invention makes stigma reduce an one magnitude, that is to say, utilizes aspheric surface post lenticulation 11 in the embodiments of the invention that the enlargement factor of the luminous point through pixel has been reduced; So just reduced the probability of left image mapped to right viewing areas to a great extent; Also reduce the probability of right image mapped to left viewing areas to a great extent, therefore, just reduced crosstalking between the left and right tool anaglyph;

Preferably; This aspheric surface post lenticulation 11 is placed display screen front 1.88mm distance; Form three-dimensional display, then laterally move and to watch normal stereoeffect, and become big gradually from the centre to the angle of inclination, both sides at the viewing distance place; Crosstalking can be little more a lot of than the sphere post lenticulation of same pitch, promptly uses this aspheric surface post lenticulation 11 and can improve crosstalking of visual field, stereo display edge.

The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle according to the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims (10)

1. a 3 d display device comprises: show the display of disparity map, and preset the post lenticulation that spacing is provided with said display with one; It is characterized in that,

Said post lenticulation comprises a plurality of post lens, and the curvature of each post lens changes from the lens center to the rims of the lens continuously.

2. 3 d display device according to claim 1 is characterized in that, arranges the said disparity map of demonstration according to a predetermined period interpolation on the display screen of said display.

3. 3 d display device according to claim 2 is characterized in that, said a plurality of post lens are arranged to a grating array according to preset pitch.

4. 3 d display device according to claim 3 is characterized in that, the disparity map of the corresponding said predetermined period of each post lens in the said grating array.

5. according to each described 3 d display device of claim 1-4, it is characterized in that said disparity map comprises: left and right two width of cloth have the image of parallax.

6. 3 d display device according to claim 1 is characterized in that, said preset spacing is the focal length of lens of said lens center to the curvature continually varying post lens of rims of the lens.

7. according to claim 1 or 6 described 3 d display devices, it is characterized in that said lens center is confirmed by following formula to the surface type of the curvature continually varying post lens of rims of the lens:

$z=\frac{{\mathrm{cr}}^2}{1+\sqrt{1-(1+k)c^2{r}^2}}+{\mathrm{\&alpha;}}_1{r}^2+{\mathrm{\&alpha;}}_2{r}^4+{\mathrm{\&alpha;}}_3{r}^6{+\mathrm{\&alpha;}}_4{r}^8+{\mathrm{\&alpha;}}_5{r}^{10}{\mathrm{\&alpha;}}_6{r}^{12}+{\mathrm{\&alpha;}}_7{r}^{14}+{\mathrm{\&alpha;}}_8{r}^{16}$

Wherein, z is the lens surface rise, and c is the curvature that rims of the lens is arrived in the lens center, and r is to be the radial coordinate of unit with length of lens unit, and k is the circular cone coefficient, α ₁-α ₈Be surface type coefficient.

8. according to claim 1 or 6 described 3 d display devices, it is characterized in that have a transparent medium between the display screen of said post lenticulation and said display, the thickness of said transparent medium equals said preset spacing.

9. 3 d display device according to claim 8 is characterized in that, institute's post lenticulation is to be processed by liquid crystal material.

10. 3 d display device according to claim 9 is characterized in that the surface of said post lenticulation has the UV glue-line.

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