Planar illuminating device and use the liquid crystal indicator of this planar illuminating device

The invention provides a kind of can on the direction of scanning, not exist luminance nonuniformity and with the briliancy of appointment distribute show, high briliancy and large-area planar illuminating device and use the liquid crystal indicator of this planar illuminating device.By the scanning light quantity by the scan light (13) of control part (20) gated sweep light guide section (15), emergent light (16) distributes with the briliancy of appointment in the direction of scanning (21) of scan light (13) and penetrates from interarea (17).