JP2021083011A5

JP2021083011A5 - Image reader

Info

Publication number: JP2021083011A5
Application number: JP2019210865A
Authority: JP
Filing date: 2019-11-21
Publication date: 2022-11-14
Anticipated expiration: 2039-11-21

Description

本発明は、原稿の画像を読み取る画像読取装置に関する。 The present invention relates to an image reading apparatus for reading an image of a document.

画像読み取り装置が故障した場合や異常画像が発生した場合にテストパターンによる検査を実施するとしているが、原稿画像を読み取る直前に不良状態を検出できることが望ましい。そうでないと、コピー出力として異常画像をさらしてしまうし、コピー紙やトナー、インクも無駄になってしまう。上記課題に鑑み、本発明は、原稿の読み取り開始の指示が入力されてから原稿の読み取りが開始されるまでの時間が長くなることを抑制しつつ、フレキシブルフラットケーブルの異常を検知することを目的とする。 Although it is said that an inspection using a test pattern is performed when the image reading device fails or when an abnormal image occurs, it is desirable to be able to detect a defective state immediately before reading the document image. Otherwise, the copy output will show an abnormal image, and the copy paper, toner, and ink will be wasted. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to detect an abnormality in a flexible flat cable while suppressing an increase in the time from input of an instruction to start reading a document until reading of the document starts. and

上記課題を解決するために、本発明にかかる画像読取装置は、
原稿が載置される透明部材と、
所定方向に移動しながら前記透明部材上の原稿の画像を読み取ることによって得られた画像データを出力する読取部であって、前記原稿の画像を読み取る指示が入力されることに応じて所定のパターンの信号を出力する読取部と、
前記読取部から出力された画像データ及び前記所定のパターンの信号を送信するフレキシブルフラットケーブルと、
前記フレキシブルフラットケーブルを介して送信されてくる前記所定のパターンの信号に基づいて、前記フレキシブルフラットケーブルが異常であるか否かを決定する決定手段と、
前記原稿の画像を読み取る指示が入力されることに応じて前記読取センサに電力を供給する電源回路と、
を有し、
前記読取部は、前記読取センサから前記電源回路への前記電力の供給が行われた後に、前記所定のパターンの信号を出力し、
前記読取部は、前記フレキシブルフラットケーブルが異常でないと決定された場合は前記原稿の画像を読み取り、前記フレキシブルフラットケーブルが異常であると決定された場合は前記原稿の画像を読み取らないことを特徴とする。 In order to solve the above problems, an image reading device according to the present invention includes:
a transparent member on which an original is placed;
A reading unit for outputting image data obtained by reading an image of a document on the transparent member while moving in a predetermined direction, the reading unit having a predetermined pattern in response to input of an instruction to read the image of the document. a reading unit that outputs a signal of
a flexible flat cable for transmitting the image data output from the reading unit and the predetermined pattern signal;
determining means for determining whether or not the flexible flat cable is abnormal based on the predetermined pattern signal transmitted through the flexible flat cable;
a power supply circuit that supplies power to the reading sensor in response to input of an instruction to read an image of the document;
has
The reading unit outputs the signal of the predetermined pattern after the power is supplied from the reading sensor to the power supply circuit,
The reading unit reads the image of the document when it is determined that the flexible flat cable is not abnormal, and does not read the image of the document when it is determined that the flexible flat cable is abnormal. do.

本発明によれば、原稿の読み取り開始の指示が入力されてから原稿の読み取りが開始されるまでの時間が長くなることを抑制しつつ、フレキシブルフラットケーブルの異常を検知することができる。According to the present invention, it is possible to detect an abnormality in a flexible flat cable while suppressing an increase in the time from when an instruction to start reading a document is input to when reading of a document is started.

Claims

a transparent member on which an original is placed;
A reading unit for outputting image data obtained by reading an image of a document on the transparent member while moving in a predetermined direction, the reading unit having a predetermined pattern in response to input of an instruction to read the image of the document. a reading unit that outputs a signal of
a flexible flat cable for transmitting the image data output from the reading unit and the predetermined pattern signal;
determining means for determining whether or not the flexible flat cable is abnormal based on the predetermined pattern signal transmitted through the flexible flat cable;
a power supply circuit that supplies power to the reading sensor in response to input of an instruction to read an image of the document;
has
The reading unit outputs the signal of the predetermined pattern after the power is supplied from the reading sensor to the power supply circuit,
The reading unit reads the image of the document when it is determined that the flexible flat cable is not abnormal, and does not read the image of the document when it is determined that the flexible flat cable is abnormal. image reader.

2. The image reading apparatus according to claim 1, wherein the reading section outputs the signal of the predetermined pattern using a transmission path through which the image data is transmitted.

The image reading device is
storage means for storing shading correction coefficients;
correction means for performing shading correction on the image data transmitted via the flexible flat cable using the shading correction coefficients stored in the storage means;
has
The reading unit outputs signals of the predetermined pattern for a plurality of lines,
The storage means adds and stores the signals of the predetermined pattern for the plurality of lines,
The determination means determines whether or not the flexible flat cable is abnormal based on a value obtained by adding the signals of the predetermined pattern for the plurality of lines stored in the storage means. 3. The image reading device according to claim 1 or 2.

The determining means comprises a memory in which information about the predetermined pattern of signals is stored,
The determining means
If the signal of the predetermined pattern transmitted through the flexible flat cable matches the information stored in the memory, it is determined that the flexible flat cable is normal, and the signal is sent through the flexible flat cable. 4. The flexible flat cable is determined to be abnormal when the incoming signal of the predetermined pattern does not match the information stored in the memory. The described image reader.

5. The image reading apparatus according to claim 1, further comprising notification means for notifying that said flexible flat cable is abnormal.