Abstract: A positive electrode includes a positive electrode active material layer, and the positive electrode active material layer includes a first lithium iron phosphate and a second lithium iron phosphate as a positive electrode active material, the first lithium iron phosphate has an average particle diameter D50 grater than that of the second lithium iron phosphate and at least one facet, and when the cross section of the positive electrode is observed with a scanning electron microscope (SEM), the cross section of the first lithium iron phosphate has at least one side having a length of 2 ?m or more.

Abstract: A hair dye dispenser according to an embodiment of the present invention includes a housing having an opening hole formed on one side of which a hair dye is provided, a plurality of cartridges disposed inside the housing and accommodating at least one dyeing material, a main body in which the plurality of cartridges are rotatably disposed, a main motor for rotating the main body so that a first cartridge of the plurality of cartridges is located adjacent to the opening hole, a discharge module for discharging the dyeing material contained in the first cartridge, and an accommodating body in which a basket accommodating the dyeing material discharged by the discharge module is placed, wherein the discharge module may include an elevating body that pressurizes the first cartridge when moving up and is separated from the first cartridge when moving down.

Abstract: An image forming apparatus includes a photosensitive unit to form an visible image, a printing medium storage unit to store a printing medium, a pickup device to pick up the printing medium from the printing medium storage unit, a developing unit to develop the electrostatic latent image of the photosensitive unit into a visual image, an optical sensor to inspect the visual image, and a cleaning unit to clean a light window arranged at the optical sensor according to a control of the pickup device.

Abstract: An image forming apparatus includes a photosensitive unit to form an visible image, a printing medium storage unit to store a printing medium, a pickup device to pick up the printing medium from the printing medium storage unit, a developing unit to develop the electrostatic latent image of the photosensitive unit into a visual image, an optical sensor to inspect the visual image, and a cleaning unit to clean a light window arranged at the optical sensor according to a control of the pickup device.