Canon Kabushiki Kaisha

Norikazu Sugiyama

Ryo Matsumura

Taro Minobe

Shunsuke Tanaka

Takahiro Yoneyama

Fumiyuki Yamatsuka

Osamu Mukataka

Kumiko Omori

An optical sensor includes a substrate, a light emitting element, a light receiving element, and an electronic circuit element. Light from the light emitting element is blocked by a detection object to detect the detection object. The light emitting element, the electronic circuit element and the light receiving element are mounted on the same surface of the substrate. The electronic circuit element is disposed between the light emitting element and the light receiving element on a mounting surface of the substrate.

Optical sensor

A printed circuit board comprises a first mounting surface, a second mounting surface, and a piezoelectric transformer. The piezoelectric transformer has a piezoelectric substance, external electrodes, and a frame substrate. The second mounting surface has a projection region. There is a first region from a first location, where an end portion further from the output electrode out of end portions of the input electrode is projected onto the second mounting surface in the projection region, to a second location, where an end portion closer to the output electrode out of the end portions of the input electrode is projected onto the second mounting surface, the first region being a mounting allowed region where an electronic component is mounted.

Printed circuit board mounting piezoelectric transformer

A solder paste is printed on a first surface of a sheet. Connectors are mounted on a first surface of a first board and a second surface of a second board. The sheet is inverted. A solder paste is printed on a second surface of the sheet. Connectors are mounted on a second surface of the first board and a first surface of the second board. The solder paste printed onto the second surface of the sheet is melted. The first board is separated from the second board. The first and second board have the same connector layout. A first connector soldered to the first surface of the first board and a second connector soldered to the second surface of the second board are disposed at a location where the sheet can be bent and broken along the separation line.

Method of making a plurality of printed circuit boards from a single circuit board sheet

An image forming apparatus includes: a formation unit configured to form a first detection pattern for density detection on an image carrier for each color used in image formation; and a first sensor and a second sensor configured to detect the first detection pattern formed on the image carrier, the first detection pattern moving in a movement direction of a surface of the image carrier as the image carrier rotates. The formation unit is further configured to form the first detection pattern on the image carrier such that a first detection pattern of an chromatic color is detected by the first sensor and a first detection pattern of an achromatic color is detected by the second sensor, and additionally form a second detection pattern for misregistration detection on the image carrier when forming the first detection pattern on the image carrier.

Image forming apparatus including first detection sensor and second detection sensor for detecting density detection pattern

The circuit board includes a contact for supplying power, in which the contact includes plural copper foil patterns each having a predetermined width, the plural copper foil patterns being formed radially from a center of the contact and connected to each other at the center of the contact. Accordingly, it is possible to enhance contact reliability of the contact while suppressing cost for connecting a high-voltage board to an image forming unit.

Circuit board and image forming apparatus

The image forming apparatus includes a BG exposure clock output sectionwhich outputs a BG exposure clock fthat slightly emits light from a laser for BG exposure toward a non-toner image forming region on a photosensitive drumand a laser control sectionwhich controls the laser so as to slightly emit light for BG exposure based on the BG exposure clock foutput from the BG exposure clock output section. The BG exposure clock output sectionoutputs a clock for BG exposure with a frequency diffused in the range from fmin to fmax.

Image forming apparatus with different clock outputs for toner and non-toner forming regions

An image of a color misregistration detection pattern is formed, and the amount of color misregistration is detected by reading of the pattern image. The amount of color misregistration detected by a detecting unit and the delay time from the time when image data is requested to the time when the image data is output are stored. The color misregistration is corrected based on the stored delay time and amount of color misregistration.

Image forming apparatus and method for controlling the same

An image forming apparatus of the present invention includes an image bearing member for carrying a toner image, a rotatable endless belt, a transfer member for transferring a toner image from the image bearing member onto the endless belt electrostatically, a detecting device to detect a distance from the endless belt, and controls amount a loop generated in the belt to the predetermined loop amount, based on the distance detected by the detecting device.

Image forming apparatus with loop correcting device

It is desirable to reduce disturbance of an unfixed toner image by suppressing vibration of the trailing end of a recording medium, and to thereby stabilize the quality of a formed image. In a first control time period based on the leading edge of the recording medium as a reference, a driving unit is controlled in accordance with detection of a loop. On the other hand, in a control time period after the first control time period, a target speed is determined from a drive speed of the driving unit in the first control time period, and the driving unit is controlled by the determined target speed.

Growing community of inventors

Susono, Japan

Norikazu Sugiyama