| 摘要 |
PURPOSE:To facilitate the assembly of a light diffusion body to improve lighting efficiency due to excluding a fixing tape by providing at least two holes or projections for position-aligning light diffusion bodies outside the light outgoing side effective display surface of a transparent light leading body. CONSTITUTION:As an example (A), projection parts 7 are provided on a diagonal line in a position outside the effective lighting surface of an acryl plate 1. Moreover, positioning can be made by only providing positioning hole parts 6 on a light diffusion body 3 through fitting to the position of the projections 7 of the plate 1 by placing the diffusion body 3 on the plate 1. In another example (B), positioning with the plate 1 can be made by changing the shape of a light diffusion body 3 through fitting to the shapes of projections 8 provided on the light outgoing surface of the acryl plate 1. At that time, the diffusion body 3 is fixed so as to be nipped between this back surface lighting device and a crystalline liquid display module. Consequently, the lighting efficiency can be increased without absorbing a part of emitted light from a light outgoing surface by a double-sided tape for fixing. |
