A multi-panel display device and a method of driving the same, which can simplify a driving circuit for driving multiple flat panel display devices, thereby decreasing the fabrication cost, are disclosed. Such information can be used to recommend an oil change and to estimate a fraction of biodiesel in the fuel supplied to the engine. According to the present invention, an effective surface area per a unit planar area of a capacitor with an MIM structure is enlarged to increase capacitance thereof. The first and second switches are also joined together at a common node. In speech coding method according to a code-excited linear prediction speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation codebooks are used based on an evaluation result.