Abstract:
In one embodiment of the invention, a stereophonic display device is provided. The stereophonic display device includes a pixel unit including a plurality of subpixels, wherein the subpixels include at least two right eye subpixels and two left eye subpixels, a barrier with a plurality of apertures formed on the pixel unit, wherein the smallest distance between the locations of the apertures projected onto the pixel unit and boundaries of the pixel unit is equal to or greater than a quarter of the width of the pixel unit, and a display image processor controlling the pixel unit rendering of the right eye subpixel block and the left eye subpixel block sequentially.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The invention relates to a stereophonic display device, and in particular to a thicker stereophonic display device capable of reducing the stereophonic X-talk issue and stereophonic moiré. 
         [0003]    2. Description of the Related Art 
         [0004]    Recently, high-resolution displays, like 330 ppi (pixels per inch) displays, are being implemented for HD movies and/or web site information on mobile phones. 
         [0005]    Therefore, design of the thickness or thinness of stereophonic displays (auto-stereoscopic type barrier/lenticular stereophonic displays) has become a critical issue. For example, a thinner lens sheet and/or a thinner glass plate are necessary for displays. However, the difficulty of fabricating thinner sheets and plates may affect production yield due to process limitations and critical process issues for mass production, such as an increase in bending or cracking. 
       BRIEF SUMMARY OF THE INVENTION 
       [0006]    One embodiment of the invention provides a stereophonic display device, comprising: a pixel unit comprising a plurality of subpixels, wherein the subpixels comprise at least two right eye subpixels and two left eye subpixels; a barrier with a plurality of apertures formed on the pixel unit, wherein the smallest distance between the locations of the apertures projected onto the pixel unit and boundaries of the pixel unit is equal to or greater than a quarter of the width of the pixel unit; and a display image processor controlling the pixel unit rendering of the right eye subpixel block and the left eye subpixel block sequentially. 
         [0007]    One embodiment of the invention provides a stereophonic display device, comprising: a pixel unit comprising a plurality of subpixels, wherein the subpixels comprise at least two right eye subpixels and two left eye subpixels; a plurality of lenses formed on the pixel unit, wherein the smallest distance between the locations of the apexes of the lenses projected onto the pixel unit and boundaries of the pixel unit is greater than a quarter of the width of the pixel unit; and a display image processor controlling the pixel unit rendering of the right eye subpixel block and the left eye subpixel block sequentially. 
         [0008]    In the present invention, an increased thickness (optical distance in air) between a pixel and a barrier or lens is designed. The thickness (optical distance in air) between the pixel and the barrier or the apexes of the lenses is proportional to the number of subpixels. Fabrication of such thicker devices is easier than that of thinner ones and the critical process issues (such as bending or cracking) for mass production of conventional high-ppi (pixels per inch) stereophonic display devices can thus be prevented, facilitating the mass production of devices. 
         [0009]    Additionally, the locations of the apertures of the barrier or the apexes of the lenses are altered, resulting in alternation of subpixel rendering from “RLRL” to “RRLL” or from “RLRLRL” to “RRRLLL” (R represents a right-eye subpixel; L represents a left-eye subpixel) in a horizontal direction, achieving a wider margin for solving the stereophonic X-talk issue, a wider stereophonic viewing space and a brighter image and reducing affects from the stereophonic moiré´ issue simultaneously. Specifically, when two or more apertures are combined into one aperture, the original fringe lens effect caused by a barrier electrode pattern edge can thus be reduced due to decreased edge numbers thereof, apparently facilitating the lowering of the stereophonic X-talk issue. 
         [0010]    A detailed description is given in the following embodiments with reference to the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawing, wherein: 
           [0012]      FIG. 1  shows a cross-section view of a stereophonic display device according to an embodiment of the invention; 
           [0013]      FIG. 2  shows a cross-section view of a stereophonic display device according to an embodiment of the invention; 
           [0014]      FIG. 3  shows a cross-section view of a stereophonic display device according to an embodiment of the invention; 
           [0015]      FIG. 4  shows a cross-section view of a stereophonic display device according to an embodiment of the invention; 
           [0016]      FIG. 5  shows a cross-section view of a stereophonic display device according to an embodiment of the invention; and 
           [0017]      FIG. 6  shows a cross-section view of a stereophonic display device according to an embodiment of the invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0018]    According to one embodiment of the invention, referring to  FIG. 1 , a stereophonic display device is provided. The stereophonic display device  10  comprises a TFT substrate  12 , a pixel unit  14  formed on the TFT substrate  12 , a color filter  20  formed on the pixel unit  14 , a polarizer  22  formed on the color filter  20 , a glue  24 , for example a pressure sensitive adhesive (PSA), coated on the polarizer  22 , a transparent material layer  26 , for example a PET layer, adhered to the polarizer  22  through the glue  24 , and a barrier  28  with a first aperture  30  and a second aperture  31  formed on the transparent material layer  26 . The pixel unit  14  comprises a first subpixel  15 , a second subpixel  16 , a third subpixel  17  and a fourth subpixel  18 . The first subpixel  15  and the second subpixel  16  are divided for the right eye. The third subpixel  17  and the fourth subpixel  18  are divided for the left eye. The first aperture  30  and the second aperture  31  are separated into two slit patterns. A width W of one aperture ( 30  or  31 ) accounts for about 60% of a width W′ of one subpixel ( 15 ,  16 ,  17  or  18 ). Thus, in this embodiment, the width W of one aperture ( 30  or  31 ) accounts for about 15% (60%× 1/4  (the pixel unit  14  comprising four subpixels ( 15 ,  16 ,  17  and  18 ))) of a width W″ of the barrier  28 . Specifically, a distance between a location  30 ′ of the first aperture  30  projected onto the pixel unit  14  and a first boundary  36  of the pixel unit  14  is equal to or greater than a quarter (¼) of the width of the pixel unit  14 . Similarly, a distance between a location  31 ′ of the second aperture  31  projected onto the pixel unit  14  and a second boundary  36 ′ of the pixel unit  14  is equal to or greater than a quarter (¼) of the width of the pixel unit  14 . For example, a distance  32  between an edge  34  of the location  30 ′ of the first aperture  30  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is five-sixteenths ( 5/16) of the width of the pixel unit  14  or a distance  32 ′ between an edge  34 ′ of the location  31 ′ of the second aperture  31  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is five-sixteenths ( 5/16) of the width of the pixel unit  14 . For example, a distance  33  between a center  38  of the location  30 ′ of the first aperture  30  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is three-eighths (⅜) of the width of the pixel unit  14  or a distance  33 ′ between a center  38 ′ of the location  31 ′ of the second aperture  31  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is three-eighths (⅜) of the width of the pixel unit  14 . The first aperture  30  and the second aperture  31  may be closer to each other, as shown in  FIG. 2 , for example, the distance  32  between the edge  34  of the location  30 ′ of the first aperture  30  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is greater than five-sixteenths ( 5/16) the width of the pixel unit  14  or the distance  32 ′ between the edge  34 ′ of the location  31 ′ of the second aperture  31  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is greater than five-sixteenths ( 5/16) the width of the pixel unit  14 , and for example, the distance  33  between the center  38  of the location  30 ′ of the first aperture  30  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is greater than three-eighths (⅜) of the width of the pixel unit  14  or the distance  33 ′ between the center  38 ′ of the location  31 ′ of the second aperture  31  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is greater than three-eighths (⅜) of the width of the pixel unit  14 . The first aperture  30  and the second aperture  31  may be further combined to form a combined aperture  41 , as shown in  FIG. 3 . In  FIGS. 1-3 , an optical distance  40  in air between the pixel unit  14  and the barrier  28  is proportional to the number of subpixels. Additionally, the ratio (K) of the double of the optical distance  40  in air between the pixel unit  14  and the barrier  28  and the width W′ of one subpixel may be greater than 9 and smaller than 15, for example K=9.5. Additionally, the stereophonic display device  10  further comprises a display image processor (not shown) controlling the pixel unit rendering of the right eye subpixel block and the left eye subpixel block sequentially. 
         [0019]    According to one embodiment of the invention, referring to  FIG. 4 , a stereophonic display device is provided. The stereophonic display device  100  comprises a TFT substrate  12 , a pixel unit  14  formed on the TFT substrate  12 , a color filter  20  formed on the pixel unit  14 , a polarizer  22  formed on the color filter  20 , a glue  24 , for example a pressure sensitive adhesive (PSA), coated on the polarizer  22 , a transparent material layer  26 , for example a PET layer, adhered to the polarizer  22  through the glue  24 , and a barrier  28  with a first aperture  290 , a second aperture  300  and a third aperture  310  formed on the transparent material layer  26 . The pixel unit  14  comprises a first subpixel  150 , a second subpixel  160 , a third subpixel  170 , a fourth subpixel  180 , a fifth subpixel  190  and a sixth subpixel  210 . The first subpixel  150 , the second subpixel  160  and the third subpixel  170  are divided for the right eye. The fourth subpixel  180 , the fifth subpixel  190  and the sixth subpixel  210  are divided for the left eye. The first aperture  290 , the second aperture  300  and the third aperture  310  are separated into three slit patterns. A width W 1  of one aperture ( 290 ,  300  or  310 ) accounts for about 60% of a width W 1 ′ of one subpixel ( 150 ,  160 ,  170 ,  180 ,  190  or  210 ). Thus, in this embodiment, the width W 1  of one aperture ( 290 ,  300  or  310 ) accounts for about 10% (60%× 1/6  (the pixel unit  14  comprising six subpixels ( 150 ,  160 ,  170 ,  180 ,  190  and  210 ))) of a width W 1 ″ of the barrier  28 . Specifically, a distance between a location  290 ′ of the first aperture  290  projected onto the pixel unit  14  and a first boundary  36  of the pixel unit  14  is equal to or greater than a quarter (¼) of the width of the pixel unit  14 . Similarly, a distance between a location  310 ′ of the third aperture  310  projected onto the pixel unit  14  and a second boundary  36 ′ of the pixel unit  14  is equal to or greater than a quarter (¼) of the width of the pixel unit  14 . For example, a distance  320  between an edge  340  of the location  290 ′ of the first aperture  290  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is seventeen-sixtieths ( 17/60) of the width of the pixel unit  14  or a distance  320 ′ between an edge  340 ′ of the location  310 ′ of the third aperture  310  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is seventeen-sixtieths ( 17/60) of the width of the pixel unit  14 . For example, a distance  330  between a center  380  of the location  290 ′ of the first aperture  290  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is one-third (⅓) of the width of the pixel unit  14  or a distance  330 ′ between a center  380 ′ of the location  310 ′ of the third aperture  310  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is one-third (⅓) of the width of the pixel unit  14 . The first aperture  290 , the second aperture  300  and the third aperture  310  may also be closer to each other, for example, the distance  320  between the edge  340  of the location  290 ′ of the first aperture  290  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is greater than seven twenty-fourths ( 7/24) of the width of the pixel unit  14  (not shown) or the distance  320 ′ between the edge  340 ′ of the location  310 ′ of the third aperture  310  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is greater than seven twenty-fourths ( 7/24) of the width of the pixel unit  14  (not shown), and for example, the distance  330  between the center  380  of the location  290 ′ of the first aperture  290  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is greater than one-third (⅓) of the width of the pixel unit  14  (not shown) or the distance  330 ′ between the center  380 ′ of the location  310 ′ of the third aperture  310  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is greater than one-third (⅓) of the width of the pixel unit  14  (not shown). The first aperture  290 , the second aperture  300  and the third aperture  310  may also be further combined to form a combined aperture (not shown). Specifically, an optical distance  40 ′ in air between the pixel unit  14  and the barrier  28  is proportional to the number of subpixels. In this embodiment, the ratio (K′) of the triple of the optical distance  40 ′ in air between the pixel unit  14  and the barrier  28  and the width W 1 ′ of one subpixel may be greater than 13.5 and smaller than 22.5, for example K′=14.3. Additionally, the stereophonic display device  100  further comprises a display image processor (not shown) controlling the pixel unit rendering of the right eye subpixel block and the left eye subpixel block sequentially. 
         [0020]    According to one embodiment of the invention, referring to  FIG. 5 , a stereophonic display device is provided. The stereophonic display device  10  comprises a TFT substrate  12 , a pixel unit  14  formed on the TFT substrate  12 , a color filter  20  formed on the pixel unit  14 , a polarizer  22  formed on the color filter  20 , a glue  24 , for example a pressure sensitive adhesive (PSA), coated on the polarizer  22 , a transparent material layer  26 , for example a PET layer, adhered to the polarizer  22  through the glue  24 , and a first lens  42  with an apex  43  and a second lens  44  with an apex  45  formed on the transparent material layer  26 . The pixel unit  14  comprises a first subpixel  15 , a second subpixel  16 , a third subpixel  17  and a fourth subpixel  18 . The first subpixel  15  and the second subpixel  16  are divided for the right eye. The third subpixel  17  and the fourth subpixel  18  are divided for the left eye. The first lens  42  and the second lens  44  are separated into two cylindrical lenses. Specifically, a distance between a location  43 ′ of the apex  43  of the first lens  42  projected onto the pixel unit  14  and a first boundary  36  of the pixel unit  14  is greater than a quarter (¼) of the width of the pixel unit  14 . Similarly, a distance between a location  45 ′ of the apex  45  of the second lens  44  projected onto the pixel unit  14  and a second boundary  36 ′ of the pixel unit  14  is greater than a quarter (¼) of the width of the pixel unit  14 . For example, a distance  32  between the location  43 ′ of the apex  43  of the first lens  42  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is three-eighths (⅜) of the width of the pixel unit  14  or a distance  32 ′ between the location  45 ′ of the apex  45  of the second lens  44  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is three-eighths (⅜) of the width of the pixel unit  14 . The first lens  42  and the second lens  44  may be closer to each other, for example, the distance  32  between the location  43 ′ of the apex  43  of the first lens  42  projected onto the pixel unit  14  and the first boundary  36  of the pixel unit  14  is greater than three-eighths (⅜) of the width of the pixel unit  14  (not shown) or the distance  32 ′ between the location  45 ′ of the apex  45  of the second lens  44  projected onto the pixel unit  14  and the second boundary  36 ′ of the pixel unit  14  is greater than three-eighths (⅜) of the width of the pixel unit  14  (not shown). The first lens  42  and the second lens  44  may be further combined to form a combined lens  46  with an apex  47 , as shown in  FIG. 6 . Additionally, the ratio (K) of a double of an optical distance  48  in air between the pixel unit  14  and the apexes ( 43  and  45 ) of the first and second lenses ( 42  and  44 ) and the width of one subpixel may be greater than 9 and smaller than 15, for example K=9.5, as shown in  FIG. 5 . The ratio (K′) of a triple of an optical distance  48 ′ in air between the pixel unit  14  and the apex  47  of the combined lens  46  and the width of one subpixel may be greater than 13.5 and smaller than 22.5, for example K′=14.3, as shown in  FIG. 6 . Additionally, similar to the present barrier-type stereophonic display devices, in the present lens-type stereophonic display devices, the optical distance in air between the pixel unit and the apexes of the lenses is proportional to the number of subpixels. Additionally, the stereophonic display device  10  further comprises a display image processor (not shown) controlling the pixel unit rendering of the right eye subpixel block and the left eye subpixel block sequentially. 
         [0021]    In the present invention, an increased thickness (optical distance in air) between a pixel and a barrier or lens is designed. The thickness (optical distance in air) between the pixel and the barrier or the apexes of the lenses is proportional to the number of subpixels. Fabrication of such thicker devices is easier than that of thinner ones and the critical process issues (such as bending or cracking) for mass production of conventional high-ppi (pixels per inch) stereophonic display devices can thus be prevented, facilitating the mass production of devices. 
         [0022]    Additionally, the locations of the apertures of the barrier or the apexes of the lenses are altered, resulting in alternation of subpixel rendering from “RLRL” to “RRLL” or from “RLRLRL” to “RRRLLL” (R represents a right-eye subpixel; L represents a left-eye subpixel) in a horizontal direction, achieving a wider margin for solving the stereophonic X-talk issue, a wider stereophonic viewing space and a brighter image and reducing affects from the stereophonic moiré´ issue simultaneously. Specifically, when two or more apertures are combined into one aperture, the original fringe lens effect caused by a barrier electrode pattern edge can thus be reduced due to decreased edge numbers thereof, apparently facilitating the lowering of the stereophonic X-talk issue. 
         [0023]    While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.