Side-Type Backlight Module and Operating Method Thereof

A side-type backlight module, comprising:

• a light guide plate comprising a first lateral face, a second lateral face, a third lateral face and a fourth lateral face, the first lateral face being opposite to the second lateral face, the third lateral face being opposite to the fourth lateral face, the first lateral face connected with the third and fourth lateral faces, the second lateral face connected with the third and fourth lateral faces;
• a plurality of first LED light sources disposed on the first lateral face, wherein every two adjacent first LED sources are spaced by a first pitch, thereby a plurality of the first pitches are arranged among the first LED light sources, wherein at least one minimum first pitch of the first pitches is positioned nearest to a center of the first lateral face;
• a plurality of second LED light sources disposed on the second lateral face, wherein every two adjacent second LED sources are spaced by a second pitch, thereby a plurality of the second pitches are arranged among the second LED light sources, wherein at least one minimum second pitch of the second pitches is positioned nearest to a center of the second lateral face;
• a plurality of third LED light sources disposed on the third lateral face, wherein every two adjacent third LED sources are spaced by a third pitch, thereby a plurality of the third pitches are arranged among the third LED light sources, wherein at least one minimum third pitch of the third pitches is positioned nearest to a center of the third lateral face;
• and
• a plurality of fourth LED light sources disposed on the fourth lateral face, wherein every two adjacent fourth LED sources are spaced by a fourth pitch, thereby a plurality of the fourth pitches are arranged among the fourth LED light sources, wherein at least one minimum fourth pitch of the fourth pitches is positioned nearest to a center of the fourth lateral face.

A method for operating a side-type backlight module, wherein the side-type backlight module comprises:

• a light guide plate comprising a first lateral face, a second lateral face, a third lateral face and a fourth lateral face, the first lateral face being opposite to the second lateral face, the third lateral face being opposite to the fourth lateral face, the first lateral face connected with the third and fourth lateral faces, the second lateral face connected with the third and fourth lateral faces;
• a plurality of first LED light sources disposed on the first lateral face;
• a plurality of second LED light sources disposed on the second lateral face;
• a plurality of third LED light sources disposed on the third lateral face;
• and
• a plurality of fourth LED light sources disposed on the fourth lateral face,
• the method for operating the side-type backlight module, comprising:
• driving the first, second, third and fourth LED light sources in such a way that powers of first, second, third and fourth LED light sources are varied.