Patent Document

BACKGROUND OF THE INVENTION  
       [0001]     This invention concerns the autostereoscopic display which can especially observe the stereoscopic vision by the naked eye for the autostereoscopic display.  
         [0002]     The lenticular method, the parallax barrier method, the integral photography method, and the holography method, etc are known as a method of displaying the stereoscopic vision which can be observed by the naked eye.  FIG. 14 ( a ) is an outline chart where the entire past autostereoscopic display is shown, and  FIG. 14 ( b ) and  FIG. 14 ( c ) are outline especially charts where they explain the integral photography method.  
         [0003]     Lens sheet  101  where the convex lens is arranged like the array is set up in front of display  106  as shown in  FIG. 14 . It explains the integral photography method which is one of the methods of displaying the stereoscopic vision which can be observed by the naked eye by using these figures. In  FIG. 14 ( b ), a three dimensional position is shown, and one section in that is  FIG. 14 ( c ).  
         [0004]     When the pixel on display  106  is very small compared with the lens, and the pixels at the position of white circle  1502  shown in  FIG. 14 ( b ) ( c ) are displayed on display  106  with a certain color and brightness, light from the pixels gathers in the position of white circle  1502  by the effect of lens sheet  101 , and it becomes a ray which spreads from that point.  
         [0005]     When observer  1501  observes this field of view  1503  shown in  FIG. 14 ( c ), it comes to be able to perceive a point light, namely an object exists in the white circle  1502 . It is also possible to use the pinhole instead of this lens.  
         [0006]     Moreover, the lenticular method that achieves the stereoscopic effect only in horizontal direction by using binocular parallax exist, too, in the way the lenticular lens sheet with half cylinder shaped lenticular lens is set up in front of display  106  instead of the convex lens, and the slender images for the right eye and the left eye which are alternately arranged along the longitudinal direction of the lenticular lens are displayed in display  106 . In these methods, the image displayed on display  106  is generated with image generation device  1504  for the binocular vision shown in  FIG. 14 ( a ).  
         [0007]     PC which generates computer graphics, multi eye camera, and single eye type cameras combined with lens sheet, etc. are enumerated as image generation device  1504  for the binocular vision.  
         [0008]     The technology concerning the lenticular method is indicated in a past technology.  
         [0009]     The technology, which makes the non-luminescence area (black matrix) between pixels unremarkable by devising the arrangement of the pixel on the display, is indicated in JP3101521B (hereafter, patent document 1).  
         [0010]     The technology, which makes the black matrix between pixels unremarkable by expanding each pixel with the lens, is indicated in JP2540999B (hereafter, patent document 2).  
         [0011]     The technology, which makes the black matrix between pixels unremarkable by installing diffusion board  102  between display  106  and lenticular lens sheet  101  as shown in  FIG. 15 , is indicated in JP2777241B (hereafter, patent document 3).  
         [0012]     The technology, which avoids unnatural binocular vision caused when the light which penetrates a pixel passes through the lenticular lens that is not correctly associated with the pixel by inserting the shading film between each lenticular lenses of the lenticular lens sheet, and the street in the lenticular lens which is not the lenticular lens that light, which penetrates the pixel, is correctly associated with the pixel, is indicated in JP289320B (hereafter, patent document 4).  
       SUMMARY OF THE INVENTION  
       [0013]     The technology, which had been described to patent document 1, changed the arrangement of the pixel on the display, and it had the problem that the cost of execution rose because it was not able to use a general purpose display.  
         [0014]     The technology, which had been described to patent document 2, had the problem that the cost of execution rose, because a lot of numbers of lenses which expanded the pixel were necessary.  
         [0015]     The technology, which had been described to patent document 3, had the problem that the reproduced stereoscopic vision blotted by the color of each pixel mixing with the color of the next pixel.  
         [0016]     There were problems in the technology of the description to patent document 4. First problem is that black matrix between pixels stands out by being expanded with lens. Second problem is that assumed color cannot be shown to the observer by the Red and the Green and the Blue each display part&#39;s of each subpixel being expanded, and causing the color separation.  
         [0017]     The assumed color cannot be shown to the observer by The Red and the Green and the Blue each display part&#39;s of each subpixel being expanded, and causing the color separation.  
         [0018]      FIG. 16  is an outline chart where the part of the display of the image of a past auto stereoscopic display is shown. The image display part is an installation of diffusion board  102  between lens sheet  101  and display  106  in this figure.  
         [0019]     The purpose to use diffusion board  102  is, before the ray reaches lens seat  101 , for instance, to avoid the color separation, by mixing three primary colors that red subpixel  107 R a , green subpixel  107 G a , and blue subpixel  107 B a  of pixel  107   a.    
         [0020]     However, there is a problem that it mixes by three primary colors of the adjoining pixel such as Blue subpixel  107 B a  of pixel  107   a  and red subpixel  107 R b  of pixel  107   b , and the color of the reproduced stereoscopic vision blots in a past technology. Therefore, the composition, in which the mixture of three primary colors of the adjoining pixel is canceled, is needed.  
         [0021]     Then, the purpose of this invention is to offer the autostereoscopic display where the phenomenon that a black matrix and the color separation stand out with the lens is not caused and the phenomenon that the reproduction stereoscopic image blots by the mixture of the color of the pixel is not caused so far according to an easy composition.  
         [0022]     In this invention, in the past autostereoscopic display shown  FIG. 15  and  16 , it was assumed the composition in which the cut along the black matrix between pixels was put on the diffusion board  102  crowded between display  106  and lens sheet  101 .  
         [0023]     Moreover, it was assumed the composition in which the angle of cut achieved the total reflection of incident light of each pixel from inside of diffusion board  102  to the oblique side of the cut. In addition, it was assumed the composition in which the angle of cut achieved the total reflection of incident light of each pixel from inside of diffusion board  102  to the oblique side of the cut 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0024]      FIG. 1  is an outline chart of the image display part in the autostereoscopic display of the embodiment  1  of the invention.  
         [0025]      FIG. 2  is a plan where it explains the pixel on the display and the arrangement of pixel and black matrix.  
         [0026]      FIG. 3  is an outline chart where it explains the ray which passes in the diffusion board.  
         [0027]      FIG. 4  is &lt;X-X′&gt; cross section of  FIG. 2  where it explains the angle and the length of the cut.  
         [0028]      FIG. 5  is an outline chart where it explains the viewing angle on the display.  
         [0029]      FIG. 6  is &lt;Y-Y′&gt; cross section of  FIG. 2  where it explains the angle and the length of the cut.  
         [0030]      FIG. 7  is a plan where the relation of the cut of the diffusion board is shown.  
         [0031]      FIG. 8  is an outline chart of the image display part in the autostereoscopic display in a modified embodiment 1 of the embodiment 1.  
         [0032]      FIG. 9  is an outline chart of the image display part in the autostereoscopic display device in a modified embodiment 2 of the embodiment 1.  
         [0033]      FIG. 10  is an outline chart of the image display part in the autostereoscopic display device in a modified embodiment 3 of the embodiment 1.  
         [0034]      FIG. 11  is an outline chart of the image display part in the autostereoscopic display in a modified embodiment 4 of the embodiment 1.  
         [0035]      FIG. 12  is an outline chart of the image display part in the autostereoscopic display in the embodiment 2 of the invention.  
         [0036]      FIG. 13  is an outline chart of the image display part in the autostereoscopic display in the embodiment 3.  
         [0037]      FIG. 14  is an outline chart of a past autostereoscopic display and the image display part.  
         [0038]      FIG. 15  is an outline chart of a past autostereoscopic display.  
         [0039]      FIG. 16  is an outline chart of the image display part in a past autostereoscopic display. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0040]     Hereafter, it explains the embodiments of this invention with reference to the drawings.  
         [0000]     [Embodiment 1] 
         [0041]     Hereafter, it explains embodiment 1 of executing this invention by using  FIG. 1  to  FIG. 7 . In this embodiment, the width of the cut put from the display side to the diffusion board is the same as the width of a black matrix or example of assumption as the angle of cut achieved the total reflection of incident light from inside of diffusion board to the oblique side of the cut is the same.  
         [0042]     In the embodiment all, the point part of the cut may not be the pointed one, may have width, and worn roundness. Moreover, the cut of the embodiment all is an isosceles triangle whose perpendicular lowered from the cut toward the display passes center of the black matrix between pixels; however, the requirement need not be strictly met.  
         [0043]      FIG. 1  is an outline chart where the part of the display of the image of the autostereoscopic display in the embodiment 1 is shown. The above mentioned image display part is an installation of diffusion board  102  between lens sheet  101  and display  106  in  FIG. 1 .  
         [0044]     Display  106  is the one that two or more pixels such as pixel  107   a ,  107   b , and  107   c  are spread.  
         [0045]     Pixel  107   a  consists of red subpixel  104 R a , green subpixel  104 G a , blue subpixel  104 B a , and black matrix  105  which is the non-display part between each subpixel.  
         [0046]     Diffusion board  102  has cut  103  put from  106  sides in the same width as the width of black matrix  105  at the position of each black matrix  105  between each pixel on the display, and the cut angle of each cut  103  is a total reflection angle as for incidence light from the inside of the diffusion board of each pixel to the oblique side of cut  103 .  
         [0047]      FIG. 2  is a plan view where it explains the pixel on the display and the arrangement of a black matrix used by the embodiments of the invention. Each three primary color display part (subpixel) R, G, and B queue up at equal intervals, and black matrix  105 , which is non-display part, exists between each.  
         [0048]     Length of the short side of each three primary color display part R, G, and B is assumed to be p1, and length of the long side is assumed to be p2. The width of black matrix  105  in the direction of the short vicinity of each three primary color display part R, G, and B is assumed to be d1, and the width of black matrix  105  in the direction of the vicinity of length is assumed to be d2.  
         [0049]     In the each embodiment, it is assumed p1=35.5 μm, p2=143 μm, d1=28 μm, and d2=47.5 μm.  FIG. 1  is a cross section in one point dot-dashed curve X-X′ shown in  FIG. 2 .  
         [0050]      FIG. 3  is an outline chart where it explains the ray which passes in the diffusion board in the embodiments. Though ray  501 , 502  diffuses in direction  503  of diffusion in diffusion board  102 , the direction of the ray treated in this text is assumed to be a direction of each ray  501 , 502  which passes in the medium without diffusive. In a general diffusion board such as the becoming frosted glass, the direction of each ray  501 , 502  is strong direction of strength of light, and it assumes that it uses such a diffusion board most in the embodiments.  
         [0051]     It explains the shape of cut  103  in this embodiment in detail by using  FIG. 1 ,  FIG. 4 , and  FIG. 5 .  FIG. 4  is an outline chart where it explains the angle and the length used by the embodiment.  
         [0052]     In  FIG. 4 , ray  308  emitted by the angle θ with display  106  can be reflected to the oblique side of cut  103  which it is angle φ, height h, and is d in width in reflection angle θi of the same size as incidence and the angle of incidence by angle of incidence θi. Moreover, the thickness of diffusion board  102  is assumed to be H=100 μm, and the refractive index is assumed to be n=1.7 in the example of each execution. When the ray starts going out from the object of refractive index n into the air, angle of incidence θi that do the total reflection of the ray in the boundary of the object and air should be critical angle θM or more given by next formula (1). It becomes θM≈36.03° in the embodiments. 
 
θ M =arc sin (1/ n )  [Formula 1]
 
         [0053]      FIG. 5  is an outline chart where it explains the viewing angle on the display used by the embodiments. When the display viewing angle on display  106  to observer  1501  is θDP, ray  401  from display  106  is emitted by angle θo or more to display  106  in this figure. θo is given by next formula (2). 
 θo=(180−θ DP )/2  [Formula 2] 
         [0054]     In the embodiments, it becomes θo=20° assuming display viewing angle θDP=140°.  
         [0055]     In  FIG. 1 , if cut  103  is put in diffusion board  102  by the angle φ that do the total reflection of ray  108  emitted at angle θo with display  106 , do the total reflection of all the ray of light incident ones from display  106  to cut  103 . Such angle φ should fill next formula (3). 
 
φ≧2(θ M −θ DP )  [Formula 3]
 
         [0056]     Moreover, height h of cut  103  with this angle φ is given by next formula (4). 
 
 h=d/{ 2 tan (φ/2)}  [Formula 4]
 
         [0057]     It is φ&gt;32.06°, and when assuming φ=32.1° for instance, it becomes h=48.66 μm in this embodiment because of d=d1=28 μm.  
         [0058]      FIG. 6  is an outline chart where the part of the display of the image of the autostereoscopic display seen from the side of red display part  104  Ra in this embodiment is shown, and the cross section in one point dot-dashed curve Y-Y′ shown in  FIG. 2 .  
         [0059]     Angle φ′ of cut  703  for the total reflection of all the ray of light incident on to the oblique side of cut  703  only has to fill “φ′&gt;32.06°” in  FIG. 6  as well as the case to cut  103 .  
         [0060]     Because the above mentioned formula consists similarly, when assuming d′ ( width of the cut  703 )=d2=47.5 μm, φ′=32.1°, it becomes h′ (height of the cut  703 )=82.55 μm.  
         [0061]      FIG. 7  is a plan where the relation of the cut of the diffusion board in this embodiment is shown. Because do the total reflection of everything, the ray of light incident on from each pixel to the oblique side of the cut of surroundings, the mixture of the color of the pixel is reduced and the image quality of the reproduction stereoscopic image can be improved.  
         [0062]     Hereafter, it explains the modified embodiment of the embodiment 1 by using  FIG. 8  to  FIG. 11 .  
         [0000]     [Modified Embodiment 1 of the Embodiment 1] 
         [0063]     In  FIG. 8 , the height of the cut is enlarged, and the modified embodiment 1 of increasing the ray of light incident on to the oblique side of the cut is shown. This modified embodiment is an example of explaining the effect when height h of the cut is set by priority. Though only the example of the cross section in one point dot-dashed curve X-X′ shown in  FIG. 2  is shown since this modified embodiment, being similarly thought for the cross section in one point dot-dashed curve Y-Y′ shown in  FIG. 2  as shown in  FIG. 6  is clear.  
         [0064]      FIG. 8  is an outline chart where the part of the display of the image of the autostereoscopic display when the width of the cut of the diffusion board is width of a black matrix is shown in this modified embodiment 1. It is assumed that it is height h=80 μm of the cut, and width d=d1=28 μm of the cut here. When h and d are given, the angle φ of the cut is given by next formula (5). 
 Φ=2 arc tan ( d/ 2 h )  [Formula 5] 
         [0065]     It becomes angle φ=19.85° of cut  903  in  FIG. 8 . At this time, ray  908  emitted from display  106  at angle θo=20° does not only the reflection in the oblique side of cut  903  but also the refraction penetration.  
         [0066]     Moreover, angle θ1 that ray  909  of the total reflection in the oblique side of cut  903  and display  106  form should fill next formula (6). 
 
θ 1 ≧θ M −φ/2  [Formula 6]
 
         [0067]     As a result, θ1&gt;26.11° can be filled, and all entire ray incidences to the oblique side of cut  903  can be reflected.  
         [0000]     [Modified Embodiment 2 of the Embodiment 1] 
         [0068]      FIG. 9  is an outline chart of the modified embodiment 2 of the width of the cut of the diffusion board showing the part of the display of the image of the autostereoscopic display when it is smaller than the width of a black matrix.  
         [0069]     It is assumed height h=80 μm of the cut and width d=18 μm&lt;d1 of the cut here.  
         [0070]     In  FIG. 9 , angle θ1 that ray  1009  of the total reflection in the oblique side of cut  1003  and display  106  do should fill θ1&gt;29.61° because it becomes angle φ=12.84° of cut  1003 .  
         [0071]     In this modified embodiment, the mixture of the color of the pixel is reduced by enlarging the height of the cut, and increasing an incidence ray to the oblique side of the cut, and the image quality of the reproduction stereoscopic image can be improved.  
         [0072]     Moreover, because the effect of the improvement is achieved even if the width of the cut is reduced more than the width of a black matrix, accuracy, by which the cut is put, need not be strict.  
         [0000]     [Modified Embodiment 3 of the Embodiment 1] 
         [0073]     It explains the modified embodiment 3 by using  FIG. 10 . This modified embodiment enlarged the height of the cut as well as modified embodiment 1, increased an incidence ray to the oblique side of the cut, it assumed the angle of the cut and an incidence ray was assumed to be a total reflection angle from the inside of the diffusion board to the oblique side of the cut.  
         [0074]     This modified embodiment is an example of explaining the effect when height h of the cut and the angle φ of the cut are set by priority.  
         [0075]      FIG. 10  is an outline chart where the part of the display of the image of the autostereoscopic display in this modified embodiment is shown. Cut  1103   a  is height h=80 μm, angle φ=32.1°, and the total reflection of all incidence rays from the diffusion board  102  to the slope of the cut  1103   a  goes out of display  106 . Here, when h and p are given, width d of the cut is given by next formula (7). 
   d= 2  h  tan (φ/2)  [Formula 7] 
         [0076]     It becomes width d=46.03 μm&gt;d1 of cut  1103   a  in  FIG. 10 .  
         [0077]     At this time, because a part of red subpixel  104 R b  and blue subpixel  104 B a  becomes arrangement which comes out in cut  1103   a , it goes out of red subpixel  104 R b , it goes out of incidence ray  1109  and blue subpixel  104 B a  from the inside of cut  1103   a  to the oblique side of cut  1103   a , incidence ray  1107  exists from the inside of cut  1103   a  in the oblique side of cut  1103   a , and they do an incidence reflection and the refraction penetration to the oblique side of cut  1103   b  of the next.  
         [0078]     In this modified embodiment, by making the height of the cut enlarged, and an incidence ray to the oblique side of the cut increased, in addition, making the angle of the cut full reflection of all incident light, the mixture of the color of the pixel is reduced, and the image quality of the reproduction stereoscopic image can be improved.  
         [0079]     Moreover, because the effect of the improvement is achieved even if the width of the cut is enlarged more than the width of a black matrix, accuracy, by which the cut needs not be strict.  
         [0000]     [Modified Embodiment 4 of the Embodiment 1] 
         [0080]     It explains the modified embodiment 4 by using  FIG. 11 . This modified embodiment, the height of the cut is enlarged and an incidence ray is increased to the oblique side of the cut as well as the modified embodiment 1, additionally, not only do total reflection but also the angle of the cut and an incidence ray from the inside of the diffusion board to the oblique side of the cut, and also from part of display in cut to example of assumption to oblique side of cut of incidence refraction penetration doing and the next as angle where do total reflection of incidence ray in oblique side of cut.  
         [0081]      FIG. 11  is an outline chart where the part of the display of the image of the autostereoscopic display in this modified embodiment 4 is shown. Cut  1203   a  is h=80 μm in height. Go out of red subpixel  104 R b  at angle θo done to display  106 , and ray  1209  which does the refraction penetration in the oblique side of cut  1203   a  for total reflection in the oblique side of cut  1203   b  of the next to cut  1203   a , the angle φ of the cut should fill next formula (8). 
 arc sin{(1/ n ) sin(θ o −φ/2)}+φ≧θ M   [Formula 8] 
         [0082]     It is φ&gt;34.37°, and when assuming φ=34.38° for instance, it becomes d=49.5 μm&gt;d1 from formula (8) in this modified embodiment. In this modified embodiment, the height of the cut is enlarged and an incidence ray is increased to the oblique side of the cut, in addition, the angle of the cut in going out of the part of the display in the cut and making an incidence ray the oblique side of the cut from the inside of the diffusion board angling of the total reflection once all including the ray which does the refraction penetration (It goes out of the part of the display in the cut and because strength of light is weak, the ray, which reflects in the oblique side of the cut, is disregarded). The mixture of the color of the pixel is reduced, and the image quality of the reproduction stereoscopic image can be improved.  
         [0000]     [Embodiment 2] 
         [0083]     Hereafter, it explains the embodiment 2 of the invention by using  FIG. 12 . This embodiment is an example of forming to the cut the shading layer where light is absorbed.  
         [0084]      FIG. 12  is an outline chart where the part of the display of the image of the autostereoscopic display in this embodiment is shown.  FIG. 12 ( a ) is an example of filling shading layer  1308   a  to cut  1303   a  of the same type as the modified embodiment 3 of the embodiment.  
         [0085]     Moreover,  FIG. 12 ( b ) is an example of forming shading layer  1308   b  thinly to the inner wall of cut  1303   b  of the same type as the modified embodiment 3.  
         [0086]     Moreover,  FIG. 12 ( c ) is an example of thinly forming shading layer  1308   c  besides under the inner wall of cut  1303   c  of the same type as the modified embodiment 3, ray  1302   c  emitted from blue subpixel  104 B in cut  1303   c  is absorbed by shading film  1308   c , and ray  1301   c  emitted from red red subpixel  104 R in cut  1303   c  does the refraction penetration.  
         [0087]     Moreover,  FIG. 12 ( d ), width is smaller than the width of black matrix  105 , and example of filling shading layer  1308   d  to cut  1303   d  whose shape is a rectangle, when the shading layer is formed. Thus, when the reflection layer is formed, the shape of the cut can be freely decided.  
         [0088]     The shading layer is formed to the cut, the mixture of the color of the pixel is reduced, and the image quality of the reproduction stereoscopic image can be improved in this execution example above.  
         [0000]     [Embodiment 3] 
         [0089]     Hereafter, it explains the embodiment 3 of the invention by using  FIG. 13 . This embodiment is an example of forming the reflection layer where light is reflected to the cut.  
         [0090]      FIG. 13  is an outline chart where the part of the display of the image of the autostereoscopic display in this embodiment is shown.  FIG. 13 ( a ) is an example of filling reflection layer  1409   a  to cut  1403   a  of the same type as the modified embodiment 3 above described.  
         [0091]     Moreover,  FIG. 13 ( b ) thinly forms reflection layer  1409   b  to the inner wall of cut  1403   b  of the same type as modified embodiment 3, it is an example of thinly forming shading layer  1408   b  in addition, an incidence ray from inside of diffusion board  102  reflects to the oblique side of cut  1403   b , and the ray in cut  1403   b  is absorbed.  
         [0092]     Moreover,  FIG. 13 ( c ) is an example of thinly forming reflection layer  1409   c  besides under the inner wall of cut  1403   c  of the same type as modified embodiment 3, and forming shading layer  1408   c  thinly in addition, ray  1402   c  emitted from blue in cut  1403   c  display part  104 B is absorbed by shading film  1408   c , ray  1401   c  emitted from red in cut  1403   c  display part  104 R does the refraction penetration.  
         [0093]     Moreover,  FIG. 13 ( d ) is an example that the width of the cut  1403   d  is smaller than the width of black matrix  105 . And  FIG. 13 ( d ) is an example of filling reflection layer  1308   d  to cut  1403   d  whose shape is a rectangle. Thus, when the reflection layer is formed, the shape of the cut can be freely decided.  
         [0094]     The reflection layer is formed to the cut, the mixture of the color of the pixel is reduced, and the image quality of the reproduction stereoscopic image can be improved in this embodiment.  
         [0095]     In setting up the diffusion board which puts the cut along the black matrix between pixels between the display and the lens sheet according to the each embodiment, As a black matrix and the color separation do without conspicuous. The blot of the color of the reproduction stereoscopic image by the color of the pixel which is mutually adjacent mixing can be improved.  
         [0096]     According to this invention above, the phenomenon that a black matrix and the color separation stand out with the lens is not caused because the pixel is separated mutually though three primary colors of each pixel are diffused, moreover, the reproduction stereoscopic image does not cause the phenomenon in which blotting by the mixture of the color of the pixel, and be able to display a &lt;high-resolution&gt; stereoscopic image.

Technology Category: 5