| 摘要 |
<p>A portable electronic device and method manage battery-produced power without lowering sound quality for music and other sound effects. In the present invention, an operation clock of the CPU of the portable electronic device and a processing wait time for image drawing are dynamically controlled. When there is no sound emission request, the CPU runs at a low clock rate. Where there is a sound emission request, the CPU runs at a high clock speed. When the sound emission ends, the CPU returns to the low clock rate. A user senses no apparent change, as the CPU slows screen drawing speed at high clock speed and increases screen drawing speed at low clock speed.</p> |
