Device and method for unlocking screen

The invention relates to a device and a method for unlocking a screen, and aims to improve a transmission mode of an image and improve a display effect of the image. The device comprises a fingerprint identification sensor, a processing module and a memorizer, the memorizer is used for storing preset sample fingerprint information, the fingerprint identification sensor is used for acquiring fingerprint information and transmitting an interrupt and the acquired fingerprint information to the processing module, the processing module is used for starting under triggering of the interrupt, comparing the received fingerprint information with the stored sample fingerprint information, lighting and unlocking the screen when the received fingerprint information is consistent with the stored sample fingerprint information.