Method and device for detecting open and closed states of platen cover plate of image reading apparatus

A device for detecting open and closed states of a platen cover plate of an image reading apparatus, comprising:

• at least one processor;
• and
• a memory configured to store instructions executable by the at least one processor;
• wherein the instructions cause the at least one processor to:
• control a scanning element to scan light at an edge of a platen to obtain a signal value representing a light intensity;
• determine whether an absolute difference value between the signal value and a preset standard value is greater than a preset tolerance value;
• and
• send a prompt signal to prompt a user to close the platen cover plate.

An image reading apparatus, comprising:

• a device for detecting open and closed states of a platen cover plate, wherein the device comprises:
• at least one processor;
• a memory configured to store instructions executable by the at least one processor;
• wherein the instructions cause the at least one processor to:
• control a scanning element to scan light at an edge of a platen to obtain a signal value representing a light intensity;
• determine whether an absolute difference value between the signal value and a preset standard value is greater than a preset tolerance value;
• and
• send a prompt signal to prompt a user to close the platen cover plate.