JPH0284472U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案に係る画像読取装置の内部構造
を示す模式図、第２図はその要部上面図、第３図
は制御系のブロツク図、第４図はＣＣＤ及びＬＣ
Ｈ信号の出力波形図、第５図は従来装置のブロツ
ク図である。 １……原稿台ガラス、３……蛍光灯、６……Ｃ
ＣＤ、７……白色板、１５……ラツチ回路、１６
……ＣＰＵ、１７……インバータ。 Fig. 1 is a schematic diagram showing the internal structure of the image reading device according to the present invention, Fig. 2 is a top view of its main parts, Fig. 3 is a block diagram of the control system, and Fig. 4 is a CCD and LC.
The output waveform diagram of the H signal is shown in FIG. 5, which is a block diagram of the conventional device. 1...Original table glass, 3...Fluorescent light, 6...C
CD, 7... White board, 15... Latch circuit, 16
...CPU, 17...Inverter.

Claims (1)

【実用新案登録請求の範囲】 光源により照明される原稿を、イメージセンサ
を用いて読取る一方、前記光源の光量を検出して
所定量に制御する画像読取装置において、 前記光源及びイメージセンサは夫々、原稿を照
明及び読取る各領域以上の照明領域及び読取領域
を備え、 前記光源の前記照明領域における原稿照明領域
以外の照明光を、原稿読取領域以外の前記読取領
域へ導く光路と、 前記イメージセンサの前記原稿読取領域以外の
読取領域における読取信号に基づいて前記光源の
光量を検出する手段と を具備することを特徴とする画像読取装置。[Claims for Utility Model Registration] In an image reading device that uses an image sensor to read a document illuminated by a light source, and detects the amount of light from the light source and controls it to a predetermined amount, the light source and the image sensor each include: an optical path including an illumination area and a reading area greater than each area for illuminating and reading a document, and guiding illumination light other than the original illumination area in the illumination area of the light source to the reading area other than the original reading area; An image reading apparatus comprising: means for detecting the amount of light from the light source based on a reading signal in a reading area other than the original reading area.