Abstract: An image forming apparatus includes a first image carrier, a first exposure part that forms a first electrostatic latent image in dot units on the first image carrier, a first development part that develops the first electrostatic latent image of the first image carrier using a first developer, and a controller that forms an inclined first band pattern of which bands incline with respect to a main scanning line direction on the first image carrier with the first exposure part and the first development part.

Abstract: An image forming apparatus includes a first image carrier, a first exposure part that forms a first electrostatic latent image in dot units on the first image carrier, a first development part that develops the first electrostatic latent image of the first image carrier using a first developer, and a controller that forms an inclined first band pattern of which bands incline with respect to a main scanning line direction on the first image carrier with the first exposure part and the first development part.

Abstract: An image formation apparatus includes: an image carrier; an exposure unit; a developer container part; a developer supply unit; a development unit; a remaining amount detector which detects a remaining amount of the developer in the container part; a development voltage application unit which applies a development voltage to the development unit; a supply voltage application unit which applies a supply voltage to the supply unit; and a voltage controller which controls the development voltage and the supply voltage. When the remaining amount of the developer detected by the remaining amount detector is reduced to a predetermined first threshold or less, the voltage controller makes an absolute value of a difference between the development voltage and the supply voltage smaller than that used when the remaining amount of the developer is larger than the first threshold.

Abstract: An image formation apparatus includes: an image carrier; an exposure unit; a developer container part; a developer supply unit; a development unit; a remaining amount detector which detects a remaining amount of the developer in the container part; a development voltage application unit which applies a development voltage to the development unit; a supply voltage application unit which applies a supply voltage to the supply unit; and a voltage controller which controls the development voltage and the supply voltage. When the remaining amount of the developer detected by the remaining amount detector is reduced to a predetermined first threshold or less, the voltage controller makes an absolute value of a difference between the development voltage and the supply voltage smaller than that used when the remaining amount of the developer is larger than the first threshold.

Abstract: An image forming cartridge comprises a developing unit configured to hold toner including a developing section configured to use the toner for developing and a supplying section configured to provide the toner to the developing section and a toner cartridge attachable to the developing unit, wherein the toner cartridge contains toner and supplies toner to the developing unit and the toner cartridge includes a stand-by charging unit configured to perform stand-by charge to the toner in the toner cartridge.

Abstract: An image forming device includes an image carrier, an exposing part, a developing member; a developer reserving part; a detection part to detect a developer remaining amount; a first count part to count a rotation number of the image carrier; a second count part to count an exposing dot number; a first calculation part to calculate a print duty for a print sheet based on the rotation number of the image carrier and the exposing dot number; and a discarding part in which when the developer remaining amount is equal to or less than a standard remaining amount, and when the print duty is less than a standard duty, developer is to discard more than the case in which the developer remaining amount is more than the standard remaining amount.

Abstract: An image forming cartridge comprises a developing unit configured to hold toner including a developing section configured to use the toner for developing and a supplying section configured to provide the toner to the developing section and a toner cartridge attachable to the developing unit, wherein the toner cartridge contains toner and supplies toner to the developing unit and the toner cartridge includes a stand-by charging unit configured to perform stand-by charge to the toner in the toner cartridge.

Abstract: An image forming apparatus includes: a developer image carrier movably disposed; a developer image forming device configured to form a developer image; a detector configured to detect a density of the developer image formed on the developer image carrier; a controller configured to control an operation of forming of the developer image by the developer image forming device; an image forming unit configured to control the developer image forming device to form a density detection pattern including the same developer images at at least a first point and a second point with a predetermined distance therebetween; a density detector configured to obtain the density of the first point and the density of the second point of the density detection pattern via the detector; and a calculator configured to calculate a density difference between the first point and the second point based on the densities obtained by the density detector.

Abstract: An image forming cartridge comprises a developing unit configured to hold toner including a developing section configured to use the toner for developing and a supplying section configured to provide the toner to the developing section and a toner cartridge attachable to the developing unit, wherein the toner cartridge contains toner and supplies toner to the developing unit and the toner cartridge includes a stand-by charging unit configured to perform stand-by charge to the toner in the toner cartridge.

Abstract: A supplying roller supplies toner to a developing roller which develops an electrostatic latent image formed on a photoconductive drum. The controller controls a power supply to output a first voltage to the developing roller and a second voltage to the supplying roller. A detector generates a detection signal indicative of the remaining amount of toner. The voltage controller performs voltage correction according to the detection signal either in a first mode or a second mode. In the first mode, the first voltage has a smaller value when the detection signal falls below a reference value than when the detection signal is above the reference value.

Abstract: An image forming apparatus includes: a developer image carrier movably disposed; a developer image forming device configured to form a developer image; a detector configured to detect a density of the developer image formed on the developer image carrier; a controller configured to control an operation of forming of the developer image by the developer image forming device; an image forming unit configured to control the developer image forming device to form a density detection pattern including the same developer images at at least a first point and a second point with a predetermined distance therebetween; a density detector configured to obtain the density of the first point and the density of the second point of the density detection pattern via the detector; and a calculator configured to calculate a density difference between the first point and the second point based on the densities obtained by the density detector.

Abstract: An image forming device includes an image carrier, an exposing part, a developing member; a developer reserving part; a detection part to detect a developer remaining amount; a first count part to count a rotation number of the image carrier; a second count part to count an exposing dot number; a first calculation part to calculate a print duty for a print sheet based on the rotation number of the image carrier and the exposing dot number; and a discarding part in which when the developer remaining amount is equal to or less than a standard remaining amount, and when the print duty is less than a standard duty, developer is to discard more than the case in which the developer remaining amount is more than the standard remaining amount.

Abstract: An image forming cartridge comprises a developing unit configured to hold toner including a developing section configured to use the toner for developing and a supplying section configured to provide the toner to the developing section and a toner cartridge attachable to the developing unit, wherein the toner cartridge contains toner and supplies toner to the developing unit and the toner cartridge includes a stand-by charging unit configured to perform stand-by charge to the toner in the toner cartridge.

Abstract: A supplying roller supplies toner to a developing roller which develops the electrostatic latent image formed on a photoconductive drum. The controller controls the supply to output first and second voltages to the developing roller and supplying roller. A detector generates a signal indicative of remaining toner. The voltage controller performs voltage correction according to the signal either in a first mode where the first voltage has a smaller value when the signal has become below a reference than when the signal is above the reference, or in a second mode where the first voltage has a smaller value when the signal has become below the reference than when the signal is above the reference, and a difference between the first and second voltages has a larger value when the signal has become below the reference than when the signal is above the reference.