Patent ID: 9415602
Filing Date: 2016-08-16
CPC Classification: B41J

Claim Text:
1. An ink jet recording apparatus comprising an ink tank for storing an ink containing a pigment, a flow path member communicating with the ink tank and a recording head for ejecting the ink supplied from the ink tank through the flow path member, wherein the apparatus further comprises a light detection unit which applies light to at least one of the ink in the ink tank and the ink in the flow path member and detects the intensity of back-scattered light of the applied light, and an image density correction unit which corrects the density of an image to be recorded on the basis of the intensity of the back-scattered light which has been detected by the light detection unit, wherein when an incident angle of the applied light is regarded as θ degrees, the back-scattered light is light received in a receiving range of more than 0 degrees and less than 2θ degrees with respect to an incident angle of the applied light.