| 摘要 |
<p>In a transparent and spread illuminating apparatus closely disposed to cover a surface of a reflection type liquid-crystal display device, a transparent substrate 2 which covers an observation face F of a reflection type liquid crystal display element L is disposed, a light reflection pattern 11 is formed on a top surface 6 of the transparent substrate 2, the light reflection pattern 11 is formed of a plurality of recesses 12 formed at given intervals P1 in parallel with the axial direction of the light source lamp 4 disposed along one side end surface 3, in which assuming that intervals between stripes which are in parallel with the recesses 12 in the arrangement of liquid cells of the reflection type liquid-crystal display device L are P2, the intervals P1 are set to satisfy a relation between P1 and P2: <MATH> or <MATH> where N is an integer: 0, 1, 2, 3, ... As a result, it is possible to suppress an interference caused by stripes with the interval P1 due to the light reflection pattern 11 and the stripes with intervals P2 due to the reflection type liquid crystal display element L to suppress the occurrence of the moire pattern. <IMAGE></p> |
