The present invention discloses a touch panel, a driving method thereof, and a display device. A grid of voxels may then be generated based on the depth image such that the depth image may be downsampled. The basic elements are a dispersion element and a rotating reflector. Beside, the permanent magnet canned motor pump provides a heat dissipation mechanism while meets the structural need of the corrosion-protection housing, so that the motor can dissipate heat in a sufficient rate.