1. Field of the Invention
One or more embodiments of the present invention relate to an image forming apparatus and method capable of forming an image on print media.
2. Description of the Related Art
In general, electrophotographic image forming apparatuses such as a laser printer, a digital copier, etc. are apparatuses which emit light onto a photosensitive medium charged to a preset potential, form an electrostatic latent image on an surface thereof, supply the image with a developing agent, develop the image to a visible image, and transfer the image onto a paper to print out the image.
In color image forming apparatuses, when images which have different colors are overlapped, if the images are not overlapped at a correct position, edges of the images are blurred, therefore the quality of the images is not good. Since this problem occurs due to various variables such as a changing of a developer, an increasing of the number of copies, a combination thereof, etc., a color registration process is needed to register images in which each color is overlapped and so as to transfer color images onto a correct position.
For this type of color registration, light can be emitted with respect to a preset overlap color pattern. Since the degree of reflectivity of light is different according to a color, when light reflected through a photo sensor is received, misalignment of overlapping position of a color pattern can be determined.