Control method of plasma TV, a bluetooth touch control pen and a plasma TV

A short-range wireless touch control pen, comprising:

• a light coupling element, a main controller and a short-range wireless radiofrequency module;
• wherein:
• the light coupling element collects a light signal carrying pixel position information by contacting a plasma TV screen at a contact point, the pixel position information including a time point of screen-updating synchronizing signal, a time point of updating a pixel residing line and a time point of updating a pixel residing column;
• the main controller is configured to calculate pixel coordinate values of the contact point position of the light coupling element on the screen according to the pixel position information in the light signal collected by the light coupling element;
• the short-range wireless radiofrequency module transmits the pixel coordinate values calculated by the main controller to the plasma TV via a short-range wireless transmission;
• and
• the pixel coordinate values of the contact point are calculated according to the steps of:
• obtaining an ordinate value of a pixel according to the time difference between the time point of updating the pixel residing line and the time point of screen-updating synchronizing signal;
• and
• obtaining an abscissa value of the pixel according to the time difference between the time point of updating the pixel residing column and the time point of screen-updating synchronizing signal.

A plasma TV, comprising:

• a screen-updating configuring module, a screen with pixel points, a short-range wireless receiving module and an operation processing module, wherein:
• the screen-updating configuring module is for configuring all or part of the pixel points of the screen to transmit a light signal carrying pixel position information, the pixel position information including a time point of screen-updating synchronizing signal, a time point of updating a pixel residing line and a time point of updating a pixel residing column;
• the short-range wireless receiving module for receiving pixel coordinate values transmitted by a short-range wireless touch control pen, and transmitting the pixel coordinate values to the operation processing module;
• the operation processing module conducting a predetermined operation or displaying a drawing in a corresponding pixel position according to the received pixel coordinate values.