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US 9,179,030 B2Granted
Image reading device, image forming apparatus, and image reading method
AssigneeKYOCERA Document Solutions Inc.
InventorYuichiro Kurokawa
Life of this patent
Estimating the term…
Abstract
An image reading device includes a red light source, a green light source, a blue light source, a white reference plate, a light-amount adjusting section, a photo-detecting section, and a signal processing section. The light-amount adjusting section sets lighting periods of the red, green, and blue light sources for reading in a monochrome mode, based on: lighting periods of the red, green, and blue light sources set for reading in a color mode; and a result of detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light respectively emitted by the red, green, and blue light sources for the respective lighting periods set for reading in the color mode.
Claims12
An image reading device for performing reading by switching between a color mode and a monochrome mode, comprising:
- a red light source configured to emit red light;
- a green light source configured to emit green light;
- a blue light source configured to emit blue light;
- a white reference plate;
- a light-amount adjusting section configured to adjust an amount of the red light, an amount of the green light, and an amount of the blue light to be emitted by the red light source, the green light source, and the blue light source, respectively;
- and
- a photo-detecting section configured to detect the red light, the green light, and the blue light emitted by the red light source, the green light source, and the blue light source, respectively, wherein
- the light-amount adjusting section sets a lighting period of each of the red light source, the green light source, and the blue light source for reading in the monochrome mode, the settings being made based on
- a lighting period of each of the red light source, the green light source, and the blue light source set for reading in the color mode, and
- a result of detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light respectively emitted by the red light source, the green light source, and the blue light source for the respective lighting periods set for reading in the color mode, and
- the light-amount adjusting section makes the settings of the lighting periods of the red light source, the green light source, and the blue light source for reading in the monochrome mode, based on
- the lighting period of each of the red light source, the green light source, and the blue light source set for reading in the color mode,
- the result of the detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light, and
- a predetermined black reference value.
11 more elements
An image reading device for performing reading by switching between a color mode and a monochrome mode, comprising:
- a red light source configured to emit red light;
- a green light source configured to emit green light;
- a blue light source configured to emit blue light;
- a white reference plate;
- a light-amount adjusting section configured to adjust an amount of the red light, an amount of the green light, and an amount of the blue light to be emitted by the red light source, the green light source, and the blue light source, respectively;
- and
- a photo-detecting section configured to detect the red light, the green light, and the blue light emitted by the red light source, the green light source, and the blue light source, respectively, wherein
- the light-amount adjusting section sets a lighting period of each of the red light source, the green light source, and the blue light source for reading in the monochrome mode, the settings being made based on
- a lighting period of each of the red light source, the green light source, and the blue light source set for reading in the color mode, and
- a result of detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light respectively emitted by the red light source, the green light source, and the blue light source for the respective lighting periods set for reading in the color mode, the light-amount adjusting section makes the settings of the lighting periods of the red light source, the green light source, and the blue light source for reading in the monochrome mode, based on
- the lighting period of each of the red light source, the green light source, and the blue light source set for reading in the color mode,
- the result of the detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light, and
- a result of detection of a black reference performed by the photo-detecting section.
10 more elements
An image reading device for performing reading by switching between a color mode and a monochrome mode, comprising:
- a red light source configured to emit red light;
- a green light source configured to emit green light;
- a blue light source configured to emit blue light;
- a white reference plate;
- a light-amount adjusting section configured to adjust an amount of the red light, an amount of the green light, and an amount of the blue light to be emitted by the red light source, the green light source, and the blue light source, respectively;
- and
- a photo-detecting section configured to detect the red light, the green light, and the blue light emitted by the red light source, the green light source, and the blue light source, respectively, wherein
- the light-amount adjusting section sets a lighting period of each of the red light source, the green light source, and the blue light source for reading in the monochrome mode, the settings being made based on
- a lighting period of each of the red light source, the green light source, and the blue light source set for reading in the color mode, and
- a result of detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light respectively emitted by the red light source, the green light source, and the blue light source for the respective lighting periods set for reading in the color mode, and
- in the monochrome mode, the red light source, the green light source, and the blue light source respectively emit the red light, the green light, and the blue light at different times.
8 more elements
An image reading device for performing reading by switching between a color mode and a monochrome mode, comprising:
- a red light source configured to emit red light;
- a green light source configured to emit green light;
- a blue light source configured to emit blue light;
- a white reference plate;
- a light-amount adjusting section configured to adjust an amount of the red light, an amount of the green light, and an amount of the blue light to be emitted by the red light source, the green light source, and the blue light source, respectively;
- and
- a photo-detecting section configured to detect the red light, the green light, and the blue light emitted by the red light source, the green light source, and the blue light source, respectively, wherein
- the light-amount adjusting section sets a lighting period of each of the red light source, the green light source, and the blue light source for reading in the monochrome mode, the settings being made based on
- a lighting period of each of the red light source, the green light source, and the blue light source set for reading in the color mode, and
- a result of detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light respectively emitted by the red light source, the green light source, and the blue light source for the respective lighting periods set for reading in the color mode, and
- the light-amount adjusting section adjusts the lighting periods of the red light source, the green light source, and the blue light source set for reading in the color mode such that the result of the detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light respectively emitted by the respective light sources approaches a predetermined target value.
8 more elements
An image forming apparatus comprising:
- an image reading device for performing reading by switching between a color mode and a monochrome mode;
- and
- an image forming section configured to form an image based on a result of reading by the image reading device, wherein
- the image reading device includes
- a red light source configured to emit red light,
- a green light source configured to emit green light,
- a blue light source configured to emit blue light,
- a white reference plate,
- a light-amount adjusting section configured to adjust an amount of the red light, an amount of the green light, and an amount of the blue light to be emitted by the red light source, the green light source, and the blue light source, respectively, and
- a photo-detecting section configured to detect the red light, the green light, and the blue light emitted by the red light source, the green light source, and the blue light source, respectively, and
- the light-amount adjusting section sets a lighting period of each of the red light source, the green light source, and the blue light source for reading in the monochrome mode, the settings being made based on
- a lighting period of each of the red light source, the green light source, and the blue light source set for reading in the color mode, and
- a result of detection performed by the photo-detecting section when the white reference plate is illuminated with the red light, the green light, and the blue light respectively emitted by the red light source, the green light source, and the blue light source for the respective lighting periods set for reading in the color mode.
10 more elements
Dependencies are inferred from the claim text.