Portable lighting and warning device

A portable lighting and warning device comprising:

• a housing;
• a lighting generator unit disposed in said housing, and operable to emit light;
• a sensor unit disposed in said housing, and sensing shaking of said housing to generate a sense output;
• a mode selector unit disposed in said housing, generating a mode indication signal that indicates one of a plurality of modes which include a first lighting mode and a warning mode, and adapted to be actuated to change the mode indicated by the mode indication signal;
• a warning generator unit disposed in said housing, and operable to output sound;
• and
• a controller unit disposed in said housing, and coupled to said lighting generator unit, said sensor unit, said mode selector unit and said warning generator unit, said controller unit receiving the sense output and the mode indication signal respectively from said sensor unit and said mode selector unit, and controlling operations of said lighting generator unit and said warning generator unit based on the sense output and the mode indication signal;
• under a circumstance where the mode indication signal indicates the first lighting mode, said controller unit controlling said lighting generator unit to emit light;
• under a circumstance where the mode indication signal indicates the warning mode, said controller unit
• waiting for a predetermined pause time, and then
• controlling said warning generator unit and said lighting generator unit to output sound and emit light when the sense output corresponds to the shaking of said housing that has an intensity greater than or equal to a predetermined level.