Discharge state detection device, discharge state detection method, and inkjet recording device

Abstract

The present invention provides a discharge state detection device, a discharge state detection method, and an inkjet recording device capable of accurately distinguishing between a recording medium and ink without increasing ink consumption. The discharge state detection device of the present invention includes: an irradiation unit that irradiates, as irradiation light, light having a wavelength in a short-wavelength region shorter than a visible light region with respect to a recording medium from which ink has been discharged from the discharge unit, the ink absorbing the short-wavelength region The light of the wavelength; the light receiving part, which is sensitive to the light of the wavelength of the short wavelength region than the light of the wavelength of the visible light region, and receives the light passing through the recording medium based on the irradiation light; the detection part, which is based on the received light. Intensity, to detect the discharge state of the ink from the discharge unit.

Description

technical field [0001] The present invention relates to a discharge state detection device, a discharge state detection method, and an inkjet recording device. Background technique [0002] In an inkjet recording device, ink is discharged onto a recording medium from a plurality of nozzles arranged in an inkjet head, and an image is formed on the recording medium. In this inkjet recording device, clogging of nozzles or failure of a discharge mechanism (incorrect ink discharge) may occur in some cases. [0003] Such clogging of the nozzles and failure of the discharge mechanism cause blurring and unevenness of the image, thereby deteriorating the image quality. In order to detect ink discharge failure, the inkjet recording device is equipped with an image reading sensor (built-in sensor) that can distinguish between the recording medium and the colored ink (CMYK ink), for example, based on the difference in reading density between the recording medium and the colored ink (CM...

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned image reading sensor, for example, when white ink is coated on white paper, it is difficult to generate a difference in reading density between the white paper and the white ink, and there is a problem that it is difficult to distinguish between white paper and white ink.

[0007] In addition, in the technology described in Patent Document 1, in order to detect the discharge failure of the white ink, it is necessary to coat the colored ink as the background color on the white paper, so there is a problem that the consumption of the colored ink increases.

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