| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical display device which is effective in preventing light leakage in a mask layer or fogging in multiple mask layers. <P>SOLUTION: In an optical structure in which first and second mask layers 21, 22 each having a predetermined design pattern and a wavelength region different from that of the other mask layer as a transmission region are formed on a second transparent substrate 18, first and second LEDs 13, 14 each having a peak of light emission intensity in the wavelength region corresponding to each of the mask layers 21, 22 are disposed. A mirror 15 is disposed behind the first and second LEDs 13, 14. Furthermore, a retroreflection layer 25 is disposed between the second mask layer 22 and the first and second LEDs 13, 14 so as to correspond to a film formation part of the overlapped design patterns of the first and second mask layers 21, 22, and visible light reflected at the retroreflection layer 25 is reflected again by the mirror 15. <P>COPYRIGHT: (C)2012,JPO&INPIT |
