Image forming apparatus and method of controlling the same

Waste toner container and image forming apparatus including same

Image forming apparatus

Toner amount detection sensor and image forming apparatus

Toner amount detection sensor

Custom color ink mixing for electro photographic printing

Image forming apparatus capable of adjusting sensitivity of optical sensor and method for adjusting sensitivity of optical sensor

Systems for optical communication between an image forming device and a replaceable unit of the image forming device

Toner detection sensor and image forming apparatus

Printing apparatus and custom color ink container

Reflection detection apparatus and apparatus using the same

Image forming apparatus

Image forming apparatus and image density control

Image forming apparatus, image forming method, and non-transitory computer readable medium

Optical sensor, image forming device, and method for correcting toner concentration

Detection device for detecting state of toner image, image forming apparatus employing the same, and method of removing foreign substance from the detection device

Toner-density calculating method, reflective optical sensor, and image forming apparatus

Image forming device with cartridge replacement alert system

Image forming apparatus of intermediate transfer method, including pre-secondary-transfer charging section and concentration detection section

Image forming apparatus having dual speed stirring control

Development apparatus and image forming apparatus using the same

Detecting colorants within carrier liquid

Calibrating toner concentration sensors using reload measurement