| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide improved means for displaying more than one graphic on a single display area. <P>SOLUTION: A first substrate 50 includes, on its rear surface 56, an etched region 58 corresponding to a first graphic 60. A second substrate 70 includes, on its front surface 74, an etched region 76 corresponding to a negative of the first graphic. The first substrate 50 acts as a light pipe conveying light to the etched region. A second light source 84 is positioned behind the second substrate 70. A mask layer 80 is provided between the second light source and the rear surface of the first substrate, and comprises an opaque region 82' defining a light transmissive region 83 corresponding to a second graphic 82. When only a first light source is illuminated, the first graphic is displayed; and when only the second light source is illuminated, the opaque region blocks the light conveyance and the second graphic is displayed. While the second graphic 82 is displayed, the etched region 58 forming the first graphic is concealed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
