Touch pad, notebook computer and method of controlling light effect on touch pad

A notebook computer, comprising:

• a touch surface layer made of a photic material;
• an electrode layer placed under the touch surface layer, the electrode layer comprising at least two photic electrodes arranged based on a first coordinate array;
• a light-emitting component layer placed under the electrode layer, the light-emitting component layer comprising at least two light-emitting components forming a light-emitting dot matrix corresponding to coordinate values of the first coordinate array;
• and
• a control device electrically coupled to the electrode layer and the light-emitting component layer, the control device comprising:
• a detecting unit, for detecting an initial value for each of the at least two photic electrodes when the touch pad is not touched by a user, and for detecting a first value for each of the at least two photic electrodes when the touch surface layer is touched by the user;
• a comparing unit, for comparing the initial value with the first value and generating a comparison value;
• and
• a processing unit, for determining the coordinate value of the each of the at least two photic electrodes based on the comparison value, and for determining a region of the light-emitting dot matrix corresponding to the coordinate value of the each of the at least two photic electrodes based on a relationship between the regions of the light-emitting dot matrix and the coordinate values of the first coordinate array, and controlling the region of the light-emitting dot matrix to emit light, and also for generating operation information based on the coordinate values in the first coordinate array;
• a central processor connected to the control device through a computer bus;
• and
• a display connected to the central processor, wherein the central processor executes the operation information so that the display displays the execution result.

A method of controlling a light effect on a touch pad, comprising steps of:

• detecting an initial value for each of at least two photic electrodes in an electrode layer when the touch pad is not touched by a user;
• detecting a first value for each of the at least two photic electrodes when the touch surface layer is touched by the user;
• comparing the initial value with the first value and generating a difference;
• and
• determining the coordinate value of the each of the at least two photic electrodes based on the generated difference;
• and
• determining a region of the light-emitting dot matrix corresponding to the coordinate value of the each of the at least two photic electrodes based on a relationship between the regions of the light-emitting dot matrix and the coordinate values of the first coordinate array, and controlling the region of the light-emitting dot matrix to emit light.