CN102331626B - 3 d display device - Google Patents

Abstract

The present invention provides a kind of 3 d display device, including: the display of display disparity map, and the Lenticular screen arranged with a preset pitch with described display；Described Lenticular screen includes multiple post lens, the curvature of each described post lens from lens centre to rims of the lens consecutive variations.The 3 d display device of the present invention has the advantage that picture crosstalk is little.

Description

3 d display device

Technical field

The present invention relates to stereo display technique, particularly relate to a kind of 3 d display device.

Background technology

Sphere Lenticular screen three-dimensional display based on binocular parallax is by flat faced display and is arranged at flat board Spheric grating on display is constituted, and this three-dimensional display has multiple independent viewpoint, in different viewpoints Upper it is observed that different picture.The display content of three-dimensional display comes from from multiple directions same field The image of scape shooting, each viewpoint shows the image that a direction photographs.Ideally, between viewpoint Being completely self-contained, the display image (i.e. disparity map) between any two viewpoint that beholder sees is nothing Crosstalk.It practice, this perfect condition is non-existent, there is string in the display image between each viewpoint Disturbing, this stereo-picture that beholder is seen obscures, and viewing effect is the best.

As it is shown in figure 1, the width of a sphere Lenticular screen 1 in sphere Lenticular screen three-dimensional display Degree is equal to the width of n the sub-pixel 2 of the colored filter (also known as color membrane substrates) of flat faced display, naked Eye stereo display is that the backlight of flat faced display is by the two width figures with parallax corresponding respectively for two viewpoints As being refracted in the right and left eyes of beholder by colored filter and sphere Lenticular screen, wherein 3 is the back of the body Light source light after the colored filter of flat faced display, this light 3 is incident to sphere Lenticular screen After 1, obtain light 4, be then directed in beholder's eye, thus allow beholder it can be seen that each viewpoint pair The image answered, thus form stereoscopic vision.

This sphere Lenticular screen 1 existing is sphere due to surface, and the emergent light 3 of flat faced display Direction is each to scattering, and therefore, sphere Lenticular screen 1 has spherical aberration for the light of different pore size, right Having coma, astigmatism etc. in rim ray, these optical aberrations can make the light of piece image after superrefraction Proceed to another one image-region, form the crosstalk between image, cause stereoscopic vision to be deteriorated, make beholder The symptoms such as dizziness occur.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of 3 d display device, can reduce this stereo display The picture crosstalk of device.

For solving above-mentioned technical problem, embodiments of the invention provide a kind of 3 d display device, including: aobvious Show the display of disparity map, and the Lenticular screen arranged with described display with a preset pitch；

Described Lenticular screen includes multiple post lens, the curvature of each post lens from lens centre to lens limit Edge consecutive variations.

Wherein, the display screen of described display shows described disparity map according to a predetermined period interpolation arrangement.

Wherein, the plurality of post lens are arranged to a grating array according to default pitch.

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

Wherein, described disparity map includes: left and right two width have the image of parallax.

Wherein, described preset pitch is the described lens centre post lens to the continual curvature change of rims of the lens The focal length of lens.

Wherein, described lens centre to rims of the lens continual curvature change post lens face, surface type by with Lower formula determines:

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

Wherein, z is lens surface rise, and c is the curvature that rims of the lens is arrived in lens centre, and r is long with lens Degree unit is the radial coordinate of unit, and k is circular cone coefficient, α₁-α₈For face, surface type coefficient.

Wherein, there is between the display screen of described Lenticular screen and described display a transparent medium, described The thickness of transparent medium is equal to described preset pitch.

Wherein, described Lenticular screen is made up of liquid crystal material.

Wherein, the surface of described Lenticular screen has UV glue-line.

Having the beneficial effect that of the technique scheme of the present invention:

In such scheme, by using lens centre to the post lens forming of the continual curvature change of rims of the lens Grating, the image with parallax is refracted to respectively the right and left eyes of beholder, can preferably optimize macropore The aberration of footpath peripheral field, such that it is able to reduce the aberration of display all angles scattered light, and then reduces vertical The crosstalk of image during body display.

Accompanying drawing explanation

Fig. 1 is the grating partial schematic diagram of existing sphere Lenticular screen three-dimensional display；

Fig. 2 is the grating partial schematic diagram of the 3 d display device of the present invention；

Fig. 3 be light gate part shown in Fig. 2 implement structural representation.

Detailed description of the invention

For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with attached Figure and specific embodiment are described in detail.

As in figure 2 it is shown, one embodiment of the invention, 3 d display device, including: display parallax Figure 101 Display 10, and the Lenticular screen 11 arranged with a preset pitch with display 10；Post lens light Grid 11 include multiple post lens, the curvature of each post lens from lens centre to rims of the lens consecutive variations. Wherein, this each lens centre is commonly referred to as to the lens of the continual curvature change of rims of the lens at optical field For non-spherical lens, therefore, above-mentioned Lenticular screen 11 can be referred to as aspheric design grating 11； This lens centre can be by below equation to face, the surface type of the post lens of the continual curvature change of rims of the lens Determine:

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

Wherein, z is lens surface rise (height z as shown in Figure 3), and c is that lens limit is arrived in lens centre The curvature of edge, r is the radial coordinate (r as shown in Figure 3) in units of length of lens unit, and k is circle Cone coefficient, α₁-α₈For face, surface type coefficient.Can be obtained by coupling experiment, this aspheric design Surface when being hyperbola, the value of circular cone coefficient k is more than 1；The surface of this aspheric design is parabolically Time, the value of circular cone coefficient k is 1；When the surface of this aspheric design is ellipse, the value of circular cone coefficient k is Between 0 to 1.

Again as in figure 2 it is shown, in the display 10 of above-mentioned 3 d display device, this parallax Figure 101 is in display According to a predetermined period interpolation arrangement on the display screen of device 10, as parallax Figure 101 includes left figure L, right figure R two width has the image of parallax, and in this current predetermined period, this left figure L, right figure R two width have The graphical arrangement of parallax is together；In next predetermined period, left figure L, right figure R two width have parallax Graphical arrangement is together；So formed left and right, left and right on the display screen of display 10 ... row Row image.

It addition, above-mentioned multiple lens centre is to post lens (the i.e. present invention of the continual curvature change of rims of the lens Embodiment in aspheric design) be arranged to a grating array, i.e. aspheric surface post according to default pitch Lenticulation；

Arrangement image on the display screen of aforementioned display device 10 with the relation that arranges of this grating array is: this light The disparity map of the corresponding above-mentioned predetermined period of each post lens in grid array；

As in figure 2 it is shown, the back light of display 10 through colored filter (shown in FIG as display The display screen of device) the left figure L sent, right figure R two width image light through aspheric design grating Left figure L and right figure R is refracted to the viewing at distance aspheric design grating 11h by the refraction of 11 respectively In region, this viewing areas includes: the viewing areas L and the viewing areas R of right figure R of left figure L, Figure represents by diagonal line hatches.

The scattering of just all angles that display 10 sends, choose the left figure L in each predetermined period, Three chief rays of right figure R are analyzed, and light a, the left figure L at left figure L edge as depicted is with right The light c at the edge of the light b and right figure R of the intersection of figure R；On display screen in all predetermined period Left figure L map to viewing areas by the aspheric design grating 11 in embodiments of the invention, institute Right figure R is had also to map to viewing areas；

Owing to the aberration of this aspheric design grating is little, so left figure L, right figure R on display screen pass through When this aspheric design grating maps in viewing areas, all of left figure L all map to as in figure tiltedly The left viewing areas L of line shadow representation, all of right figure R all map to such as the right side of figure bend shadow representation Viewing areas R；Map to viewing areas R or right figure R almost without left figure L and map to viewing areas The phenomenon of L, forms above-mentioned left figure L, right figure R does not has the viewing areas of crosstalk；

But the light of other angle and direction also can reflect via aspheric Lenticular screen, say, that The point of other visual field and the light of other angle, according to-20 ° of viewing visual angle to the 20 ° choosing of general display device Being optimized with aspheric design grating 11, the aberration being somebody's turn to do all light in-20 ° to 20 ° visual angles makes Relative sphere Lenticular screen make moderate progress, thus reduce the crosstalk of bore hole stereoscopic display device.

In the above embodiment of the present invention, saturating with the aspheric surface post that display 10 is arranged with a preset pitch Mirror grating 11 is to focal length of lens f that preset pitch is this aspheric design grating 11 of this display 10. Distance f between two dotted lines as shown in Figure 2.

As it is shown on figure 3, in another embodiment of the invention, when this 3 d display device implements, on State that to have one between Lenticular screen 11 (i.e. aspheric design grating) and the display screen of display 10 saturating Bright medium 12, the thickness of this transparent medium 12 is equal to above-mentioned preset pitch f, thus limit display 10 with Distance between Lenticular screen 11 is preset pitch f.The refractive index of this transparent medium 12 is preferably 1.515, This transparent medium 12 can be such as glass；Above-mentioned Lenticular screen 11 (i.e. aspheric design grating) is Being made by according to the liquid crystal material of certain predetermined direction orientation, the refractive index of this liquid crystal material is preferably 1.65；Other light transmissive material can certainly be selected to make.Wherein, the part indicated by 13 in figure is The surface curve of the aspheric design grating 11 in embodiments of the invention.

Further, the surface of above-mentioned Lenticular screen 11 (i.e. aspheric design grating) has UV Glue-line 14, it is preferred that the structure of this UV glue-line 14 groove type as illustrated in the drawing, this groove type UV glue-line 14 is filled above-mentioned liquid crystal material, thus it is saturating to form the aspheric surface post being made up of this liquid crystal material Mirror grating 11, the refractive index of this UV glue-line 14 is preferably 1.52；UV glue is to pass through ultraviolet light irradiation One class of solidification is gluing；Direction indicated by arrow 15 shown in Fig. 3 is view direction.

The implementing of above-described embodiment be described below as a example by concrete display:

If with the point of the display screen of display away from (point is away from being the distance between adjacent two pixels) being 0.1695mm, viewing distance 45cm, the pitch of design aspheric design grating 11 is 0.248mm. The light that any point of display 10 sends is through the transparent medium 12 that refractive index is 1.515, and passes through to be somebody's turn to do Transparent medium 12 is injected and is equal to, by refractive index, the aspheric design grating 11 that the liquid crystal of 1.65 is made, then Being refracted into refractive index is 1.52UV glue-line 14；Beholder is entered finally by the air layer that refractive index is 1 Eyes.

In the present embodiment, the optical parametric of aspheric design can be: visual field: ± 10 °；R=0.183085 =1/c；Circular cone coefficient k=-1.0002；Asphericity coefficient only selects quadravalence factor alpha₄=3；This aspheric surface post Lenticulation 11 well controls optical aberration；Wherein, under 0 visual field, the minimum 5um of stigma of pixel, The stigma of ± 10 ° is within 11.6um, and the stigma of sphere Lenticular screen is the most all at more than 10um；

Visible, the aspheric design grating 11 used in embodiments of the invention makes stigma reduce one The order of magnitude, say, that utilize the aspheric design grating 11 in embodiments of the invention to make by picture The amplification of the luminous point of element reduces, and the most largely decreases left image and maps to right viewing area The probability in territory, the most largely decreases right image and maps to the probability of left viewing areas, therefore, just subtract Lack the crosstalk between left and right tool anaglyph；

Preferably, this aspheric design grating 11 is placed in 1.88mm distance before display screen, shape Become three-dimensional display, then at viewing distance, transverse shifting can watch normal stereoeffect, and therefrom Between become larger to angle of inclination, both sides, crosstalk can be more much smaller than the sphere Lenticular screen of same pitch, i.e. Apply this aspheric design grating 11 can improve the crosstalk of stereo display peripheral field.

The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art For art personnel, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications, These improvements and modifications also should be regarded as protection scope of the present invention.

Claims (5)

1. a 3 d display device, including: the display of display disparity map, and the Lenticular screen arranged with a preset pitch with described display；It is characterized in that,

Described Lenticular screen includes multiple post lens, the curvature of each post lens from lens centre to rims of the lens consecutive variations；Showing described disparity map according to a predetermined period interpolation arrangement on the display screen of described display, the plurality of post lens are arranged to a grating array according to default pitch；Having a transparent medium between the display screen of described Lenticular screen and described display, the thickness of described transparent medium is equal to described preset pitch, and the focal length of lens that described preset pitch is aspheric Lenticular screen；Described lens centre is determined to face, the surface type of the post lens of the continual curvature change of rims of the lens by below equation:

Wherein, z is lens surface rise, and c is the curvature that rims of the lens is arrived in lens centre, and r is the radial coordinate in units of length of lens unit, and k is circular cone coefficient, α₁-α₈For face, surface type coefficient, wherein α₄=3；

The refractive index of described transparent medium is 1.515；The refractive index of described Lenticular screen is 1.65；

Described Lenticular screen is placed in 1.88mm distance before described display screen.

3 d display device the most according to claim 1, it is characterised in that the disparity map of the corresponding described predetermined period of each post lens in described grating array.

3 d display device the most according to claim 1 and 2, it is characterised in that described disparity map includes: left and right two width have the image of parallax.

3 d display device the most according to claim 1, it is characterised in that described Lenticular screen is made up of liquid crystal material.

3 d display device the most according to claim 4, it is characterised in that the surface of described Lenticular screen has UV glue-line.