Abstract: An image forming apparatus includes a density detector to detect a density of an image to be printed, and an image density controller to adjust a toner supply amount and a developing bias based on a detection result of the density detector to thereby adjust a density of the image.

Abstract: An image forming apparatus includes a density detector to detect a density of an image to be printed, and an image density controller to adjust a toner supply amount and a developing bias based on a detection result of the density detector to thereby adjust a density of the image.

Abstract: An image forming apparatus and a control method thereof. The image forming apparatus includes an image input part, a development unit which is supplied with a toner and forms a developer to develop an input image inputted from the image input part, a transfer member to form a patch image, a density sensor which detects density of the patch image, and a toner supply amount control unit which sets a toner supply amount of the development unit according to changed density of the patch image which is detected by the density sensor with a predetermined detecting cycle and applies the set toner supply amount to operation of printing the input image. Accordingly, a cycle of test printing the patch image can be extended to a longer period, unnecessary consumption of the toner is prevented, and the density of the printed image can be maintained stably.