Method for controlling light emission of ink cartridge and control unit, circuit board, ink cartridge, and imaging device

A method for controlling light emission of an ink cartridge, the ink cartridge being detachably mounted on a main body of an imaging device, the ink cartridge including a control unit and a light emitting unit, the method comprising:

• receiving from the imaging device, by a control unit, a light emitting control instruction;
• determining, by the control unit, whether the light emitting control instruction is a light-on instruction;
• starting, by the control unit, a light-on delay timing if the light emitting control instruction is a light-on instruction;
• and
• controlling, by the control unit, the light emitting unit to emit a light if a timing value of the light-on delay timing reaches a threshold time period.

An ink cartridge detachably mounted on a main body of an imaging device, the ink cartridge comprising:

• a light emitting unit configured to emit a light;
• and
• a control unit configured to:
• receive, from the imaging device, a light emitting control instruction;
• determine whether the light emitting control instruction is a light-on instruction;
• start a light-on delay timing if the light emitting control instruction is a light-on instruction;
• and
• control the light emitting unit to emit a light if a timing value of the light-on delay timing reaches a threshold time period.