Patent
Colour image forming apparatus, which controls the image density by evaluating a reflection signal and a diffuse reflection signal of an optical detecting unit
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TLDR
In this article, an amount of toner transfer on a reference pattern is calculated by using an optical detecting unit (130) that detects both regular reflection light and diffuse reflection light from a detection target simultaneously, based on a relative ratio between a value obtained by subtracting a result of multiplying a "diffuse reflection output" by a minimum value of a ratio between the regular reflection output and the diffuse reflection output from the "regular reflection output".Abstract:
An amount of toner transfer on a reference pattern is calculated by using an optical detecting unit (130) that detects both regular reflection light and diffuse reflection light from a detection target simultaneously, based on a relative ratio between a value obtained by subtracting a result of multiplying a "diffuse reflection output" by a "minimum value of a ratio between a regular reflection output and the diffuse reflection output" from the "regular reflection output" of the density detection reference pattern, and a value obtained by subtracting a result of multiplying the "diffuse reflection output" by a "minimum value of a ratio between the regular reflection output and the diffuse reflection output" from the "regular reflection output" in the background of a transfer belt (120) or an intermediate transfer body (22).read more
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Toner-density calculating method, reflective optical sensor, reflective optical sensor device, and image forming apparatus
TL;DR: In this article, a toner density is calculated from outputs of light-receiving elements based on a difference between a reflection property of a supporting member and a reflection properties of the toner pattern.
Patent
Toner-density calculating method, reflective optical sensor, and image forming apparatus
Hidemasa Suzuki,Koji Masuda +1 more
TL;DR: In this article, the toner density of a pattern, which is formed on a supporting member in the image forming apparatus, is calculated based on a sum of the amounts of specularly reflected and diffusely reflected light.
Patent
Toner density sensor and image forming apparatus
Yoshitaka Taishi,Hajime Kawai +1 more
TL;DR: In this paper, a light path formed along the front surface of a printed substrate on which the light emitting element and the light receiving element are surface-mounted, the light path having an irradiation path that allows passage of light applied from the light emitted element, and a light receiving path that allowed passage of the reflected light.
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Patent
Control method and image forming apparatus
TL;DR: In this paper, a control method of image forming conditions of an image forming device for forming a toner image for density detection is provided. But the method is based on a corrected output obtained from an output corresponding to the regular reflection light and an output correspond to the diffuse reflection light, wherein a method of deriving the corrected output can be changed.