Patent ID: 8624918

Claim:
An electronic reader, comprising: a storage unit configured for storing electronic files; an input unit configured for generating input signals in response to user input operations; a display unit; and a processing unit configured for: controlling the electronic reader to enter a reading mode where the display unit is configured for displaying the electronic files in response to the input signals; recording a length of duration time for which the electronic reader operates in the reading mode; executing a first protective instruction if the duration time reaches a first preset time, wherein the first protective instruction is selected from the group consisting of changing display property of characters displayed on the display unit and playing a reminding file to remind user to take measures to reduce fatigue; and executing a second protective instruction if the duration time reaches a second preset time, the second preset time being greater than the first preset time; further controlling the input unit to be unresponsive to input operations excepting a shutdown command when the display unit is suspended, and activating the display unit after a preset suspension time period is lapsed.