Sharp Kabushiki Kaisha Corporation

Denso Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yoshiyuki Noda

Yoshikado Yamada

Toshihisa Matsuo

Atsushi Narukawa

Yoshiteru Mori

Kazushi Shikata

Toshiyuki Watanabe

Hideki Yamamoto

Hiroaki Yoshida

Junichi Kajiwara

Katsumi Terada

Masahiro Haraguchi

Hideo Taniguchi

Masashi Toyoda

Kenichi Kato

Katsutoshi Ishikawa

Tadashi Okada

Akihito Namikawa

Makoto Kitahira

Tsutomu Kashima

Yasumasa Suita

Toru Kirimura

A projection display device includes an optical modulation element configured to modulate light outputting from a light source, and a projection unit configured to project light modulated by the optical modulation element on a projection screen. The projection display device includes an element control unit that controls the optical modulation element to display a test pattern image, an acquiring unit that acquires an image obtained by capturing the test pattern image from an image capture element that captures the test pattern image projected on the projection screen, and an adjusting unit that adjusts an image projected on the projection screen on the basis of the capture image acquired by the acquiring unit. The element control unit controls the optical modulation element such that a guidance image that guides focus adjustment of the image projected on the projection screen is displayed.

Projection display device

To prevent a reduction in an amount of an ion emission while preventing generation of electromagnetic noise. A high-voltage generating circuit section () that supplies a high voltage to an ion generating element () that generates ions is housed in a housing (), and sealed with filled resin (). An emission port () for emitting the generated ions is formed in the housing (), and an outer surface of the housing except the emission port is covered with a shield case (). A passage port () communicating with the emission port is formed in the shield case. A periphery of the passage port of the shield case is covered with an electrically insulating covering sheet () so that emitted ions do not adhere to the shield case. The ions emitted from the emission port do not adhere to the shield case covered with the covering sheet.

Ion generating device

A sheet feeding device, includes a lift down sensor for detecting a rotating plate of a rotatable cassette lowered down to a planar position, a lift up sensor for detecting the rotating plate lifted up to a sheet feeding position, a lateral feed position detecting sensor for detecting the rotatable cassette situated in the lateral feeding position, a longitudinal feed position detecting sensor for detecting the rotatable cassette situated in the longitudinal feeding position, and control means for controlling the drive mechanisms of the sheet feeding device. In the rotating operation of the rotatable cassette, if the lift down sensor is not turned on, the rotating plate is lowered so as to turn on the lift down sensor, thereafter the rotatable cassette is rotated to the predetermined longitudinal or lateral feeding position, and after the lateral or longitudinal feed position detecting sensor is turned on, the rotating plate is lifted up until the lift up sensor is turned on.

Sheet feeding device having movable sheet placing unit for use in a

An image forming apparatus comprising: a rotating section of a rotatable cassette movable between a longitudinal feed position from which paper longitudinally oriented with respect to a feeding direction is fed and a lateral feed position from which paper laterally oriented with respect to the feeding direction is fed; a document size detection device for detecting the size and orientation of a document; an automatic paper selection function for selecting a cassette in accordance with document size/orientation data obtained from the document size detection device and magnification data; a timer for measuring a predetermined perod of time; a RAM for storing the document size/orientation data; and control a device for (i) controlling the timer to start its measuring operation upon detection of a document size/orientation by the document size detection device, (ii) controlling the movement of the rotating section of the rotatable cassette to a position which corresponds to a determined orientation of the copy paper if the rotatable cassette is selected by the automatic paper selection function, and there occurs no change in the document size/orientation data sent from the document size detection device to the RAM before the completion of the measuring operation by the timer, and renewing the document size/orientation data stored in the RAM and restarting the measuring operation of the timer if the document size/orientation data have been changed before the completion of the first set measuring operation of the timer. With the above arrangement, even if there occurs a change in the document size/orientation data due to a detection error etc. within a predetermined time period, the rotating section of the rotatable cassette can be set in a desired feed position without undesirable rotations.

Image forming apparatus having a controller to prevent erroneous feeding

An image forming apparatus comprising rotatable cassettes rotated by cassette rotating means between a longitudinal feeding station from which paper is fed in a longitudinal direction thereof and a lateral feeding station from which paper is fed in a lateral direction thereof, wherein memory means stores a cassette rotation signal, when the cassette rotation signal is entered therein and cassette rotating means is controlled in accordance with the cassette rotation signal stored in the memory means when a cassette rotation permission signal for permitting the rotation of the rotatable cassette is generated, so that the rotatable cassette is set in a predetermined feeding station. The invention also provides an image forming apparatus capable of storing the feeding station of the rotatable cassette in the memory means and rotating the rotatable cassette to the feeding station stored in the memory means when the rotatable cassette is out of both longitudinal feeding station and lateral feeding station. Further, the invention provides an imagae forming apparatus capable of selecting a desired cassette from a plurality of cassettes and instructing to rotate the rotatable cassette by depressing a minimum number of operation keys. The invention further provides an image forming apparatus wherein the rotatable cassette is taken out therefrom by setting the rotatable cassette in either of the longitudinal feeding station and the lateral feeding station, characterized in that the rotatable cassette is set in the feeding station specified as a rotatable cassette taking-out/insertion position each time an image formation is completed.

Image forming apparatus

A copying apparatus is provided with an automatic light exposure control system for setting the amount of light from a light source on the basis of light reflected by an original document to which light from the light source is applied, the amount of light in a plurality of levels is applied to a reference document so that data of light reflected from the reference document may be stored in the apparatus. When a certain document is copied, the amount of light from the light source is automatically controlled on the basis of the data of reflected light of the document to be copied and the data of reflected light of the reference document stored in the apparatus.

Copying apparatus provided with an automatic light exposure control

Growing community of inventors

Kyoto, Japan

Yoshiyuki Noda