Image reading apparatus and image forming apparatus provided with same

An image reading apparatus includes a first housing, a second housing, a document conveyance path, a transparent member, a guide member, a transparent sheet member and a first pressing member. The second housing is openable and closable with respect to the first housing. The document conveyance path is arranged in the second housing and conveys a document passing through a first position. The guide member is arranged on the transparent member at a side downstream of the first position. The transparent sheet member is arranged on the transparent member to cover the first position. The first pressing member is arranged to cover a part of the transparent sheet member upstream of the first position from above and presses the transparent sheet member. An end portion of the first pressing member is arranged inwardly of an end portion of the transparent sheet member in the main scanning direction.

Image reading apparatus that acquires of appropriate white reference data, image reading method, and image forming apparatus

An image reading apparatus includes a reading circuit, a white reference member, a control circuit, a memory circuit, and a processing circuit. The control circuit controls the reading circuit to: cause a light source to irradiate the white reference member with lights of a plurality of colors and cause a light receiving unit to receive the reflected lights. The processing circuit performs a process to identify abnormal data included in white reference data stored in the memory circuit. The processing circuit identifies information on the abnormal data in a light of an abnormal-data detected color among the plurality of colors. The processing circuit identifies the abnormal data in lights of other colors excluding the abnormal-data detected color among the plurality of colors based on the information on the abnormal data. The information is identified for the light of the abnormal-data detected color.

Image forming apparatus

A document reading device includes: a document feed section; a contact glass plate on which an original document is fed from the document feed section; a white color reference member beside a front surface of the contact glass plate; a first reading unit beside a back surface of the contact glass plate, configured to read the original document on the front surface of the contact glass plate or the white color reference member; and a positioning member configured to position the white color reference member to be read selectively between a first reading position being the same position as the original document in contact with the front surface of the contact glass plate and a second reading position away from the front surface of the contact glass plate by a document passage clearance allowing the original document to pass between the contact glass plate and the white color reference member.

Image reader and image forming apparatus including same

An image reader of the present disclosure includes a contact glass, an automatic document feeder, a first reading module, and a second reading module. The first and second reading modules each acquire black reference data through reading performed by a sensor with a light source turned off, and acquires white reference data through reading performed by the sensor at a position facing a white reference plate with the light source turned on. In a case of performing continuous one-side reading by means of the first reading module, based on a sensor output value of the second reading module in the continuous one-side reading, it is determined whether it is necessary for the first reading module to reacquire the black reference data or the white reference data.

IMAGE READING APPARATUS AND IMAGE FORMING APPARATUS

An image reading apparatus includes a first housing, a second housing, a document conveyance path, a plate-like transparent member, a reader, a guide member, a transparent sheet member and a pressing member. The guide member is arranged on the transparent member at a side downstream of the first position in a conveying direction of the document and guides the document to a downstream side in the conveying direction. The transparent sheet member includes a first sheet portion which is arranged on the transparent member to cover the first position and a second sheet portion which is held in contact with the guide member and with which the document being conveyed along the document conveyance path comes into contact. The pressing member presses a side of the first sheet portion upstream of the first position in the conveying direction against the transparent member. 1. An image reading apparatus , comprising:a first housing;a second housing which is openable and closable relative to the first housing;a document conveyance path which is arranged in the second housing and conveys a document so that the document passes a first position on the first housing facing the second housing in a closed state;a plate-like transparent member which is so arranged opposite to the second housing in the first housing as to include the first position and a second position which is adjacent to the first position and where a stationary document is placed on the upper surface of the transparent member with a document surface faced down;a reader which is arranged in the first housing and reads an image of the document or the stationary document at the first or second position via the transparent member;a guide member which is arranged on the transparent member at a side downstream of the first position in a conveying direction of the document and guides the document to a downstream side in the conveying direction;a transparent sheet member which includes a first sheet portion which is ...

IMAGE READING APPARATUS AND IMAGE FORMING APPARATUS PROVIDED WITH SAME

An image reading apparatus includes a first housing, a second housing, a document conveyance path, a transparent member, a guide member, a transparent sheet member and a first pressing member. The second housing is openable and closable with respect to the first housing. The document conveyance path is arranged in the second housing and conveys a document passing through a first position. The guide member is arranged on the transparent member at a side downstream of the first position. The transparent sheet member is arranged on the transparent member to cover the first position. The first pressing member is arranged to cover a part of the transparent sheet member upstream of the first position from above and presses the transparent sheet member. An end portion of the first pressing member is arranged inwardly of an end portion of the transparent sheet member in the main scanning direction. 1. An image reading apparatus , comprising:a first housing;a second housing openable and closable with respect to the first housing;a document conveyance path arranged in the second housing and configured to convey a document so that the document passes through a first position on the first housing facing the second housing in a closed state;a plate-like transparent member arranged in the first housing to face the second housing in such a manner as to include the first position and a second position which is adjacent to the first position and where a fixed document is placed on the upper surface of the transparent member with a document surface faced down;a reading unit extending in a main scanning direction intersecting with a conveying direction of the document in the first housing, movable in a sub scanning direction along the conveying direction of the document and configured to read an image of the document or the fixed document through the transparent member at the first position and the second position;a guide member arranged on the transparent member at a side downstream ...

IMAGE READING DEVICE AND IMAGE FORMING APPARATUS INCLUDING SAME

An image reading device includes an original document transport device, a first reading module and a control portion. When the control portion performs the light source turning-on confirmation processing of the first reading module, the control portion performs first opening/closing determination processing for determining the state of the opening and closing of a cover member, light amount acquisition processing for turning on a light source so as to acquire light amount data after it is determined in the first opening/closing determination processing that the cover member is in a closed state, second opening/closing determination processing for determining again the state of the opening and closing of the cover member after the acquisition of the light amount data in the light amount acquisition processing and light amount determination processing for determining the light amount after it is determined that the cover member is in the closed state. 1. An image reading device comprising: an original document transport path along which an original document is passed,', 'a cover member which can be opened and closed in a predetermined section of the original document transport path,', 'an opening/closing detection sensor which detects a state of opening and closing of the cover member and', 'a white reference plate which is arranged in the cover member and which is opposite a first reading module in a state where the cover member is closed and, 'an original document transport device that includes'}that transports the original document;the first reading module that is arranged within the original document transport device, that includes a light source and a sensor for reading, as image light, light which is applied from the light source to the transported original document and which is reflected off the transported original document and that can read an image on the original document transported by the original document transport device; anda control portion that ...

IMAGE READER AND IMAGE FORMING APPARATUS INCLUDING SAME

An image reader of the present disclosure includes a contact glass, an automatic document feeder, a first reading module, and a second reading module. The first and second reading modules each acquire black reference data through reading performed by a sensor with a light source turned off, and acquires white reference data through reading performed by the sensor at a position facing a white reference plate with the light source turned on. In a case of performing continuous one-side reading by means of the first reading module, based on a sensor output value of the second reading module in the continuous one-side reading, it is determined whether it is necessary for the first reading module to reacquire the black reference data or the white reference data. 1. An image reader comprising:a contact glass that is fixed to an upper surface of a scanner frame and divided into a manual document reading glass and an automatic document reading glass;an automatic document feeder that is openable and closable with respect to the contact glass in an up-down direction and conveys a document sheet to an upper surface of the automatic document reading glass; that is disposed below the contact glass so as to be reciprocatable in a sub scanning direction,', 'that is capable of reading an image on a front side of a document sheet laid on the manual document reading glass while moving in the sub scanning direction, and', 'that is also capable of reading an image on a front side of a document sheet conveyed to the upper surface of the automatic document reading glass while remaining stationary at a reading position that faces the automatic document reading glass; and, 'a first reading module'}a second reading module that is disposed inside the automatic document feeder, and capable of reading an image on a back side of a document sheet conveyed to the upper surface of the automatic document reading glass,whereinthe first reading module and the second reading module each include a light ...

Image reading device

An outer peripheral member disposed at an outer periphery of a platen glass includes first and second reference surfaces. The first reference surface is a lower surface of an area extending along a side edge portion of the platen glass at an end in a main scanning direction. The second reference surface is located adjacent to the first reference surface in a second direction and differs in light reflectance from the first reference surface. An image processing portion determines whether outer periphery pixel data of an outer periphery area in line image data acquired successively while a scanning unit is moving, satisfies a border condition. A unit driving portion positions the scanning unit to a home position by moving the scanning unit a predetermined distance from where the scanning unit is located when it is determined that the outer periphery pixel data satisfies the border condition, and stops it.

IMAGE READING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME

An image reading apparatus includes a document feeder, a reading unit configured to read an image of a document fed by the document feeder, a facing member positioned to face the reading unit via a document feeding path, and a detection processing unit configured to perform area detection processing for detecting an area of the document with respect to a read image obtained by the reading unit. The facing member includes a white portion and a gray portion. The reading unit selectively performs normal reading for reading the image of the document with the white portion of the facing member as a background and auto-crop reading for reading the image of the document with the gray portion of the facing member as the background. The detection processing unit performs the area detection processing only in the auto-crop reading. 1. An image reading apparatus comprising:a document feeder that feeds a document;a reading unit that reads an image of the document fed by the document feeder;a facing member that is positioned to face the reading unit via a feeding path of the document; anda detection processing unit that performs area detection processing for detecting an area of the document with respect to a read image obtained by the reading unit reading the image of the document with the facing member as a background, whereinthe facing member has a white portion in which a surface is white and a gray portion in which a surface is gray,the reading unit selectively performs normal reading for reading the image of the document with the white portion of the facing member as the background, and auto-cropping reading for reading the image of the document with the gray portion of the facing member as the background, andthe detection processing unit performs the area detection processing only in the auto-crop reading among the normal reading and the auto-crop reading.2. The image reading apparatus according to claim 1 , further comprising:an operation unit configured to receive a ...

Image reading device and image forming system

Then image reading device includes a transparent document table, a frame, a reading unit, a moving mechanism, a white reference member, and a controller. The frame is provided around a peripheral of the document table. The white reference member is provided on the frame adjacent to the document table in the sub scanning direction and has a length in the main scanning direction longer than the document table. The reading unit includes a first reading part which reads an area corresponding to the document table and a second reading part which reads an area corresponding to the frame. The controller detects a boundary between the frame and the reference member based on a read value of the second reading part while moving the reading unit by the moving mechanism, and positions the reading unit at a home position apart from the boundary by a predetermined distance.

Document reading device and image forming apparatus provided with same

A document reading device ( 20 ) includes: a document conveyance section ( 6 ) and a document reading device ( 5 ). A conveyed document reading region ( 161 b ) has: a document discharge guide ( 51 ) arranged downstream of an image reading position ( 163 a ) in a document conveyance direction; and a transparent reading sheet ( 52 ) provided along a surface of the contact glass ( 161 ) and a surface of the document discharge guide ( 51 ), the document conveyance section ( 6 ) has a reading guide ( 62 ) forming a document conveyance path oppositely to the conveyed document reading region ( 161 b ), and the reading guide ( 62 ) has, on part of a surface opposing the conveyed document reading region ( 161 b ), a black reference member ( 620 ) optically read by an image reading section ( 163 ) for the purpose of correcting black reference data of an image of the document conveyed by the document conveyance section ( 6 ) and read by the document reading device ( 5 ).

Image reading device and image forming apparatus

An image reading device includes a first contact glass on which a document is conveyed from a document conveying part, a second contact glass on which the document is placed, a document separation member provided between the first contact glass and the second contact glass and separating the document from the first contact glass, a reading unit provided on rear-surface sides of the first contact glass and the second contact glass so as to be movable in a sub-scanning direction, and a guide member provided across both of the first contact glass and the document separation member on the rear-surface side of the first contact glass and guiding the movement of the reading unit.

Image reading device, image forming apparatus therewith, and image reading method

An image reading device can perform fixed-reading processing where image data is read by a fixed-document method and conveyed-reading processing where image data is read by a sheet-through method while a reading module is kept staying at any of a plurality of image reading positions including a reference reading position. A control portion, when a reference second adjustment value for the reference reading position used for shading correction in the conveyed-reading processing is acquired, calculates a second adjustment values for a plurality of image reading positions based on the reference second adjustment value, and when the reference second adjustment value is not acquired and a first adjustment value used for shading correction in the fixed-reading processing is acquired, calculates the second adjustment values for the plurality of image reading positions based on the first adjustment value.

IMAGE READING DEVICE AND IMAGE FORMING APPARATUS THEREWITH

An image reading device includes a document conveying device, a first reading module and a control portion. When initial white reference data, that is, an initial value of white reference data, is acquired, the control portion performs white reference data acquisition processing in a plurality of reading modes sequentially, and if it is judged that the white reference data meets a predetermined condition through data judging processing in all the plurality of reading modes, the acquired initial white reference data is set as usable, and if it is judged that the white reference data does not meet the predetermined condition through data judging processing in at least one of the plurality of reading modes, the acquired initial white reference data is set as unusable. 1. An image reading device , comprising:a document conveying device which conveys a document;a first reading module which is arranged inside the document conveying device and which can read an image of a conveyed document conveyed by the document conveying device; anda control portion which controls the first reading module,wherein a document conveying passage through which the conveyed document passes,', 'a cover member with which a predetermined section of the document conveying passage can be opened and closed, and', 'a white reference roller which is rotatably arranged on the cover member and which faces the first reading module when the cover member is closed, and, 'the document conveying device includes'} a light source, and', 'a sensor which reads, as an image light, reflected light of light shone from the light source to the conveyed document, and, 'the first reading module includes'} first open/closed checking processing for judging whether the cover member is open or closed,', 'data acquisition processing for acquiring white reference data with the sensor by rotating the white reference roller and turning on the light source after the cover member is judged to be closed through the first open/ ...

IMAGE READING APPARATUS THAT ACQUIRES OF APPROPRIATE WHITE REFERENCE DATA, IMAGE READING METHOD, AND IMAGE FORMING APPARATUS

An image reading apparatus includes a reading circuit, a white reference member, a control circuit, a memory circuit, and a processing circuit. The control circuit controls the reading circuit to: cause a light source to irradiate the white reference member with lights of a plurality of colors and cause a light receiving unit to receive the reflected lights. The processing circuit performs a process to identify abnormal data included in white reference data stored in the memory circuit. The processing circuit identifies information on the abnormal data in a light of an abnormal-data detected color among the plurality of colors. The processing circuit identifies the abnormal data in lights of other colors excluding the abnormal-data detected color among the plurality of colors based on the information on the abnormal data. The information is identified for the light of the abnormal-data detected color. 1. An image reading apparatus , comprising:a reading circuit that includes a light source and a light receiving unit;a white reference member; cause the light source to irradiate the white reference member with lights of a plurality of colors; and', 'cause the light receiving unit to receive the reflected lights;, 'a control circuit that controls the reading circuit toa memory circuit that stores white reference data acquired by receiving the reflected lights; anda processing circuit that performs a process to identify abnormal data included in the white reference data stored in the memory circuit,wherein the processing circuit identifies information on the abnormal data in a light of an abnormal-data detected color among the plurality of colors, the processing circuit identifying the abnormal data in lights of other colors excluding the abnormal-data detected color among the plurality of colors based on the information on the abnormal data, the information being identified for the light of the abnormal-data detected color.2. The image reading apparatus according to ...

Image reading device capable of reading image data from document sheet, image forming apparatus including image reading device, and adjustment value setting method implemented in image reading device

An image reading device includes a first setting processing portion, a second setting processing portion, and a third setting processing portion. The first setting processing portion, when first reference data has been read in a first reading process in which image data is read from a sheet placed on a sheet placement portion, sets a first adjustment value which is used in a shading correction. The second setting processing portion, when second reference data has been read in a second reading process in which image data is read from a sheet conveyed by a sheet conveying portion, sets a second adjustment value which is used in the shading correction. The third setting processing portion, in a case where only one of the first adjustment value and the second adjustment value has been set, sets the other based on the one that has been set.

Document reading device and image forming apparatus

A document reading device includes: a document feed section; a contact glass plate on which an original document is fed from the document feed section; a white color reference member beside a front surface of the contact glass plate; a first reading unit beside a back surface of the contact glass plate, configured to read the original document on the front surface of the contact glass plate or the white color reference member; and a positioning member configured to position the white color reference member to be read selectively between a first reading position being the same position as the original document in contact with the front surface of the contact glass plate and a second reading position away from the front surface of the contact glass plate by a document passage clearance allowing the original document to pass between the contact glass plate and the white color reference member.

Image reading apparatus, and image forming apparatus with the same

【課題】白色基準部材における光電変換部材の読み取り位置を適切に検知し、適切な白色基準データを生成して画像品質を十分に確保可能な画像読取装置及び画像形成装置を提供する。 【解決手段】画像読取装置２１には、光源１及び反射板２が配置された第１キャリッジ８、第２キャリッジ９、鏡胴６、ＣＣＤセンサ７、コンタクトガラス２５、保持部材５７に嵌め込まれた白色基準板５５が備えられている。白色基準板５５の略長方形状の反射面５５ａの上側及び下側端部５５ｂには、左側端部５５ｂが切り抜かれた形状からなる傾斜部５５ｅが形成されている。 【選択図】図４

画像読込み光学系ユニット

(57)【要約】 【課題】 長時間にわたって光源をホームポジションに 停止させておくことによりワイヤについたクセに起因す る画像の読込み不良が有効に防止された画像読込み光学 系ユニットを提供すること。 【解決手段】 上面に原稿載置用のコンタクトガラスが 取り付けられた枠体内に、光源と、ＣＣＤ素子と、光学 レンズと、複数の反射ミラーとを備え、該光源及び反射 ミラーはワイヤー駆動により走査駆動可能に保持されて おり、前記光源からのコンタクトガラス上の原稿反射光 を、前記反射ミラー及び光学レンズを介して前記ＣＣＤ 素子で受光して原稿画像を読み取る画像読込み光学系ユ ニットにおいて、前記光源は、該光学系ユニットの稼動 一時休止状態時及び停止状態時においては、該光学系ユ ニットの稼動可能状態時において位置しているホームポ ジションから退避して、前記原稿載置用のコンタクトガ ラスの枠外の退避ポジションに保持されていることを特 徴とする。

磁気ディスク装置およびその製造方法

(57)【要約】 【課題】磁気ディスクに塗布された潤滑剤がスライダに 付着蓄積することによって発生する磁気ディスク装置の 起動障害を防止する。 【解決手段】スライダ表面にフルオロアルキルシランの オリゴマー膜を形成することによって、スライダ表面 の、磁気ディスクに塗布された潤滑剤の接触角を50度以 上にする。

Image reading device and image forming apparatus

An image reading device includes a first contact glass on which a document is conveyed from a document conveying part, a second contact glass on which the document is placed, a document separation member provided between the first contact glass and the second contact glass and separating the document from the first contact glass, a reading unit provided on rear-surface sides of the first contact glass and the second contact glass so as to be movable in a sub-scanning direction, and a guide member provided across both of the first contact glass and the document separation member on the rear-surface side of the first contact glass and guiding the movement of the reading unit.

Document reading device and image forming device provided with same

Image reading device comprising an outer peripheral member including two reference surfaces adjacent in the sub-scanning direction and differing in light reflectance

An outer peripheral member disposed at an outer periphery of a platen glass includes first and second reference surfaces. The first reference surface is a lower surface of an area extending along a side edge portion of the platen glass at an end in a main scanning direction. The second reference surface is located adjacent to the first reference surface in a second direction and differs in light reflectance from the first reference surface. An image processing portion determines whether outer periphery pixel data of an outer periphery area in line image data acquired successively while a scanning unit is moving, satisfies a border condition. A unit driving portion positions the scanning unit to a home position by moving the scanning unit a predetermined distance from where the scanning unit is located when it is determined that the outer periphery pixel data satisfies the border condition, and stops it.

画像形成装置

【課題】発光源の温度上昇を抑制して、十分な発光量を確保することが可能な画像形成装置を提供することを目的とする。 【解決手段】画像形成装置１は、原稿シートの画像情報を光学的に読み取る画像読取部２２０であって、光を発生する発光源２２３と、光を所定の導光方向Ｄ１に導光する導光部２２４とを有する光学部材を含み、光学部材を導光方向Ｄ１と直交する移動方向Ｄ２に移動させて、光を原稿シートに対して走査させることにより、画像情報を読み取る画像読取部２２０と、画像読取部２２０の直下方に配置され、画像情報に基づいて記録シートＰ上に画像を形成する画像形成処理を行う装置本体２とを含み、画像読取部２２０は、画像形成処理に伴う装置本体２の放熱によって熱を帯びる帯熱部（前方部２２Ｆ）を、導光方向Ｄ１における下流側に対応する位置に有する。 【選択図】図１

画像読取装置及び画像形成装置

【課題】本発明はいわゆるエッジ影の発生を抑制すると共に、原稿に照射される光における光量ムラが抑制された画像読取装置を提供することを目的とする。 【解決手段】カラーコピー機１は、原稿Ｇに光を照射する照明部３４７ａを有する。そして、照明部３４７ａは、主走査方向Ｙに所定間隔で配置される複数のＬＥＤ５０１と、複数のＬＥＤ５０１と原稿Ｇとの間に配置され、複数のＬＥＤ５０１により発光された光を拡散させる楕円拡散板５０７と、楕円拡散板５０７により拡散された光の一部であって原稿Ｇに直接照射されない光を反射させて原稿Ｇに照射させる第２反射ミラー５４１Ｂと、を有する。 【選択図】図３

画像読取装置

【課題】原稿検知のために光源を点灯させる場合でも、ユーザが眩しくなる恐れを常に抑制することのできる画像読取装置を提供する。 【解決手段】この画像読取装置は、原稿を載置する原稿台１０２と、主走査方向１０５に沿って線状に配列された複数個の光源１０６と、イメージセンサと、イメージセンサの出力信号に基づいて原稿台上の原稿を検知する原稿検知部と、原稿の有無を検知するために複数個の光源１０６のうちの一部を点灯する光源制御部とを備える。光源制御部は、原稿台１０２上に原稿１０３が検知されているときに複数個の光源１０６全てを点灯する。 【選択図】図１

画像読取装置及び画像形成装置

【課題】装置コストの増加を抑制し、かつ、異常データを除去することにより適正な白色基準データを取得することが可能な画像読取装置を提供する。【解決手段】画像読取装置２は、光源４及び受光部５を含む読取部３と、白色基準部材６と、光源４から白色基準部材６に複数色の光を照射させ、その反射光を受光部５により受光させるように読取部３を制御する制御部と、当該反射光を受光することにより取得される白色基準データを格納するメモリ部と、当該メモリ部に格納された白色基準データに含まれる異常データを特定する処理を行う処理部と、を備える。処理部は、複数色のうち異常データ検知色の光について、異常データの情報を特定し、かつ、複数色のうち異常データ検知色を除いた他色の光について、異常データ検知色の光について特定された異常データの情報に基づいて異常データを特定する。【選択図】図３

画像読取装置、画像形成装置、調整値設定方法

【課題】読取方法の違いに起因して発生する画像データの濃度差を低減可能な画像読取装置、画像形成装置、及び調整値設定方法を提供すること。 【解決手段】画像形成装置は、コンタクトガラスに載置された原稿から画像データを読み取る第２固定読取処理が実行される場合において、前記第２固定読取処理に対応するシェーディング補正の第１調整値を設定する第１設定処理が実行されておらず（ステップＳ３１のＮｏ）、ＡＤＦによって搬送される原稿から画像データを読み取る第２搬送読取処理に対応するシェーディング補正の第２調整値を設定する第２設定処理が実行されている場合に（ステップＳ３１１のＹｅｓ）、前記第２調整値に基づいて前記第１調整値を設定する（ステップＳ３１２）。 【選択図】図６

画像読取装置及びこれを備えた画像形成装置

【課題】必要な場合にのみ冷却ファンを駆動してＬＥＤを冷却することによって、省エネルギーを図りつつＬＥＤの光量と光量スペクトルの変化を抑えて原稿画像を高精度に読み取ることができる画像読取装置を提供すること。 【解決手段】複数のＬＥＤを配列して成る光源と、該光源に向かって送風して前記ＬＥＤを冷却する冷却ファンを備え、前記ＬＥＤから原稿面に向かって出射される光によって原稿面を走査して原稿画像を読み取る画像読取装置において、前記ＬＥＤに設定値以上の電流を供給した場合に前記冷却ファンを駆動制御する。又、原稿読取方式として原稿搬送読み取り方式を採る場合に前記冷却ファンの駆動制御を行う。更に、前記ＬＥＤの点灯時間が設定値を超えた場合に前記冷却ファンを駆動制御する。 【選択図】図４

画像読み込み光学系装置に使用されるｃｃｄユニット

(57)【要約】 （修正有） 【課題】 コンタクトガラスの取り外しなどの面倒な作 業を行なうことなく、容易にＣＣＤ素子の高さ調節によ る原稿反射光とＣＣＤ素子の受光面との位置調整を行な うことが可能な画像読み込み部に使用されるＣＣＤユニ ットを提供すること。 【解決手段】 ＣＣＤ素子を備えたＣＣＤ基板４２と、 画像読み込み部に固定される支持基板４４と、該支持基 板の上面に、スライド移動による位置調整可能に位置決 めされるスライド板４６と、該スライド板上に、弾性賦 勢されて保持され、且つ前記ＣＣＤ基板が取り付けられ る高さ調整基板４８とから成り、前記スライド板には、 前記高さ調整基板の下面に当接するカム７２と、該カム を駆動回転するための駆動部材７４が保持されており、 前記駆動部材によるカムの回転によって高さ調整基板に 取り付けられたＣＣＤ基板のＣＣＤ素子受光面の位置調 整が行なわれることを特徴とする。

画像読取装置及びそれを備えた画像形成装置

【課題】原稿の両面を各々異なる読取モジュールで読み取る画像読取装置において、原稿の片面を連続読取する場合の画像品質を確保しつつ、生産性の高い画像読取装置及びそれを備えた画像形成装置を提供する。【解決手段】画像読取装置は、コンタクトガラスと、原稿搬送装置と、第１読取モジュールと、第２読取モジュールと、を備える。第１読取モジュール及び第２読取モジュールは、光源を消灯させた状態でセンサーによる読み取りを行うことにより黒色基準データを取得し、白基準板に対向した位置で光源を点灯させた状態でセンサーによる読み取りを行うことにより白色基準データを取得する。第１読取モジュールにより片面連続読取を行う場合、片面連続読取中の第２読取モジュールのセンサー出力値に基づいて、第１読取モジュールによる黒色基準データまたは白色基準データの再取得の要否を決定する。【選択図】図５

Image reading device and image forming device

The present invention is aimed at providing an image reading device that suppresses generation of a so-called edge shadow while suppressing uneven intensity of light emitted onto an original. A color copy machine 1 includes an illumination portion 347 a that irradiates an original G with light. The illumination portion 347 a includes a plurality of LEDs 501 disposed at predetermined intervals in a main scanning direction, an elliptical diffuser plate 507 that is disposed between the plurality of LEDs 501 and the original G and causes the light emitted by the plurality of LEDs 501 to diffuse, and a second reflection mirror 541 B that reflects light, which is a portion of the light diffused by the elliptical diffuser plate 507 and not directly irradiated onto the original G, so as to irradiate the light onto the original G.

Image reading device and image forming device

An image reading device is provided. The image reading device suppresses uneven intensity of light emitted on a subject, by disposing a diffusion plate between the subject and a plurality of luminescence portions, and an image forming device that includes this image reading device. The image reading device includes an illumination portion that irradiates light onto a subject. The illumination portion includes: a plurality of LED's disposed at predetermined intervals in a main scanning direction; and an elliptical diffuser plate that is disposed between the subject and the plurality of LED's and diffuses light emitted by the plurality of LED's in a higher diffusion rate in the main scanning direction than in a sub-scanning direction.

画像読取装置及び画像形成システム

【課題】簡潔な構成により短時間で読取ユニットをホームポジションに位置決めすること。【解決手段】スキャナーは、原稿が置かれる透明な原稿台３１と、原稿台３１の縁部に沿って設けられたフレーム３２と、主走査方向に原稿を読み取る読取ユニットと、主走査方向と交差する副走査方向に読取ユニットを移動させる移動機構と、副走査方向に原稿台３１と隣り合うようにフレーム３２に設けられ、主走査方向の長さが原稿台３１よりも長い白色の基準部材６０と、移動機構を制御する制御部とを備え、読取ユニットは、原稿台３１に対応する領域を読み取る第１読取部４１と、フレーム３２に対応する領域を読み取る第２読取部４２と、を含み、制御部は、移動機構により読取ユニットを移動させながら、第２読取部４２の読取値によりフレーム３２と基準部材６０との境界Ｂを検知し、境界Ｂから所定距離Ｄだけ離間したホームポジションＨに読取ユニット４０を位置決めする。【選択図】図７

Image reading device, image forming apparatus therewith, and image reading method

An image reading device can perform fixed-reading processing where image data is read by a fixed-document method and conveyed-reading processing where image data is read by a sheet-through method while a reading module is kept staying at any of a plurality of image reading positions including a reference reading position. A control portion, when a reference second adjustment value for the reference reading position used for shading correction in the conveyed-reading processing is acquired, calculates a second adjustment values for a plurality of image reading positions based on the reference second adjustment value, and when the reference second adjustment value is not acquired and a first adjustment value used for shading correction in the fixed-reading processing is acquired, calculates the second adjustment values for the plurality of image reading positions based on the first adjustment value.

画像読取装置の制御方法

【課題】光源として冷陰極管ランプを備えた画像読取装置において、画像読取動作前における冷陰極管ランプの立ち上がりの際、安定光量に達したことを環境温度に応じて的確にいち早く見極めることができる制御方法を提供する。 【解決手段】冷陰極管ランプの立ち上がりの光量を基準時間毎に順に画像読取用の光センサで検出し、この検出結果に基づく基準時間毎の光量変化率が基準値以下になった後に、画像読取動作の可能な状態に移行するものであって、基準時間は、光源付近の環境温度が高いほど短く設定されている。 【選択図】 図２