| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide plate structure realizing a uniform backlight in order to solve a problem of local heightening of luminance. <P>SOLUTION: The light guide plate structure 10 is provided with a light-transmitting layer 12. The light-transmitting layer 12 is provided with a plurality of light guide points 14 and/or luminance enhancement holes 30 used for changing light paths inside the layer. A size of each of the plurality of light guide points 14 is within the range of 0.01 to 0.1 mm. The plurality of light guide points 14 are dispersed so as to form a plurality of regions corresponding to a plurality of given key positions. A dispersion density of the plurality of light guide points 14 at a site where a transmission light intensity in the light-transmitting layer 12 is comparatively high is smaller than that of the same 14 at a site where a transmission light intensity in the light-transmitting layer 12 is comparatively low. The plurality of luminance enhancement holes 30 are dispersed in accordance with luminance of transmission light, with a sum total of outer peripheries of all the luminance enhancement holes in a comparatively dark region being larger than that of outer peripheries of all the luminance enhancement holes in a comparatively bright region. <P>COPYRIGHT: (C)2013,JPO&INPIT |
