IMAGE FORMING DEVICE WITH DECISION FUNCTION OF SCANNING RAMP CHANGING TIMING

摘要

The image reading device for determining the replacement time of the scanning lamp is disclosed. An image reading device according to the present invention, in the scanning light, the image reading apparatus having a reflecting plate for reflecting light radiated from the lamp that irradiates light to a document, and receives the light radiated to the reflection plate in a scanning lamp to an electrical signal by comparing the image data of the converted optical unit, an image processing unit that receives the electrical signal converted by the image data of a predetermined format, and a reflector for each line of the scanning lamp according to the number of the defective pixel detected at the same position in each line having parts of the line pattern comparison for determining the replacement time. According to such an image reading device, a scanner, can be carried out without using a separate test equipment the presence of error in the scanning lamp provided in such image reading device as a copying machine, and an image reading device scanning characteristic is deteriorated scanning to determine the point in time when the self- It can determine when to replace the lamp.