IMAGE DENSITY DETECTOR, IMAGE FORMING APPARATUS INCORPORATING IMAGE DENSITY DETECTOR, IMAGE DENSITY DETECTING METHOD, AND IMAGE FORMING METHOD
First Claim
1. An image density detector for detecting image density of an image borne by an image bearer, the image density detector comprising:
- a reference board having a spectral reflectance distribution closer to a spectral reflectance distribution of the image forming material than a spectral reflectance distribution of white;
a light emitter to emit light to the reference board and the image borne by the image bearer; and
a light receiver to receive the light emitted by the light emitter and reflected from the image and the reference board;
an image density calculator to calculate the image density of the image based on an output of the light receiver receiving the light emitted by the light emitter and reflected from the image; and
an image density detecting condition corrector to correct an image density detecting condition based on an output of the light receiver receiving the light emitted by the light emitter and reflected from the reference board.
1 Assignment
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Accused Products
Abstract
An image density detector for detecting image density of an image borne by an image bearer includes a reference board, a light emitter, a light receiver, an image density calculator, and an image density detecting condition corrector. The reference board has a spectral reflectance distribution closer to a spectral reflectance distribution of the image forming material than a spectral reflectance distribution of white. The light emitter emits light to the reference board and the image borne by the image bearer. The light receiver receives the light reflected from the image and the reference board. The image density calculator calculates the image density of the image based on an output of the light receiver receiving the light reflected from the image. The image density detecting condition corrector corrects an image density detecting condition based on an output of the light receiver receiving the light reflected from the reference board.
13 Citations
17 Claims
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1. An image density detector for detecting image density of an image borne by an image bearer, the image density detector comprising:
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a reference board having a spectral reflectance distribution closer to a spectral reflectance distribution of the image forming material than a spectral reflectance distribution of white; a light emitter to emit light to the reference board and the image borne by the image bearer; and a light receiver to receive the light emitted by the light emitter and reflected from the image and the reference board; an image density calculator to calculate the image density of the image based on an output of the light receiver receiving the light emitted by the light emitter and reflected from the image; and an image density detecting condition corrector to correct an image density detecting condition based on an output of the light receiver receiving the light emitted by the light emitter and reflected from the reference board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for detecting image density, the method comprising:
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emitting light to an image on a surface of an image bearer; detecting image density of the image based on the light emitted to and reflected from the image; emitting light to a reference board having a predetermined spectral reflectance distribution closer to a spectral reflectance distribution of an image forming material with which the image is formed than a spectral reflectance distribution of white; and correcting an image density detecting condition based on the light emitted to and reflected from the reference board. - View Dependent Claims (16, 17)
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Specification