200526011 (1) 九、發明說明 【發明所屬之技術領域】 本發明係關於掃描器、傳真機、或影印機中所使用的 圖像讀取裝置，特別係關於採用密接式圖像感測器的圖像 讀取裝置、及雙面用圖像讀取裝置。 【先前技術】 近年隨個人電腦的高性能化，不僅辦公室就連一般家 庭亦對快速讀取原稿紙的需求增加，掃描器或印表機形成 組合的複合機等，將所讀取的原稿在電腦中進行處理，且 具有輸出爲文書等機能的電腦週邊機器需求正擴大中。 相關此種原稿讀取裝置’已知有內建C Μ Ο S感測器的 密接式圖像感測器、或採用CCD感測器的圖像感測器。 而在掃描器系統方面則有：固定原稿紙並移動圖像感測器 的平台式掃描器系統，或相反的固定圖像感測器並移動原 稿紙的進紙式掃描器系統，已然商品化。 上述任一掃描器系統均盡可能要求裝置外觀的小型、 薄型’更要求資料目買取速度局速化。而且其中一部份已知 具有一次便讀取原稿紙雙面機能的裝置。 所以’例如雙面讀取用掃描器系統已知有夾置原稿紙 ，且在相對向位置處配置2台圖像感測器，利用一次的原 稿用紙便δ買取原稿雙面的技術。 雙面δ賈取裝置大多爲進紙式掃描器，一般乃例如包夾 原稿紙且將圖像感測器配置成相對向於原稿雙面位置。習 -4- 200526011 (2) 知雙面讀取裝置的槪略如第2圖所 圖像感測器朝副掃描方向錯開配置 〇 第2圖所示習知雙面讀取裝置 圖像感測器的蓋玻璃5之間配置原 配置二套系統，並利用二側的原稿 定方向進行搬送的方式。 此雙面讀取裝置乃因爲二套系 位置上相隔開，因而裝置將大型化 7間距離隔開，因而將有無法讀取κ 改良此種不良情況的裝置，有 測器之相互透鏡與光軸，偏離中心 的單元，相互配置於正上方位置處 取線正上之紙按押輥程度的小型化 (參照如專利文獻1 )。 【專利文獻1】日本專利特開q 【發明內容】 (發明欲解決之課題） 上述專利文獻1所揭示的雙面 明用光源的指向性較寬廣，就連原 亦將有照明光到達，因而特別係部 稿紙並進入相對向側的讀取裝置受 資訊中出現光影效應的缺點。 示。在此乃圖示將小型 方式，此構造乃屬一般 係在原稿按押輥8、與 稿紙。此乃上下相對向 饋進輥7將原稿紙朝一 統在讀取裝置水平方向 ，而且因爲原稿饋進輥 卜尺寸原稿紙等缺點。 將相對向配置的圖像感 朝副掃描方向大幅錯開 ，俾企圖達不需使用讀 〇 p 1 1 -2 847 9 8 號公報 讀取裝置，因爲原稿照 稿照射位置以外的地方 分的光將直接或穿透原 光部中，導致讀取圖像 -5- 200526011 (3) 另一方面，爲防止上述對象側光源的直射光及洩漏光 之影響，便有藉由相互將感測器的透鏡位置朝副掃描方向 大幅錯開而改善，因而即便進紙式裝置亦頗難小型化’尙 且如上述因爲原稿饋進用輥的間距亦將變長，所以無法處 理小張原稿的問題仍然存在。 (供解決課題之手段） 本發明的雙面讀取裝置，係關於同時讀取原稿紙表背 配面所書寫資訊的雙面讀取裝置，係具有將至少由光源、 蓋玻璃、自聚焦透鏡陣列（Selfoc lens arrays)及受光元 件所構成第1與第2圖像感測器，以上述原稿紙爲中心相 對向配置的構造，且從上述第1圖像感測器光源起，至上 述第2圖像感測器的自聚焦透鏡陣列受光部之間，配置著 阻斷直射光的遮光構件。 再者，上述遮光構件可爲黒色亦可爲白色。特別係當 白色的情況時，最好具有在無原稿狀態下，測定來自反射 構件之反射光強度的手段。 (發明之效果） 本發明係減少相對向透鏡在副掃描方向的錯開量，縮 窄原稿饋進輥間距間隔，便可將整體裝置小型化。而且， 亦可讀取小張原稿。尙且可避免來自相對向讀取裝置的照 明光影響，藉此將防止通過原稿紙而映入背面圖像資訊的 情況，且可防止因穿透過原稿紙的光所發生光洩漏，導致 -6- 200526011 (4) 產生白點的情況。 結果便具有可獲得漂亮的讀取圖像之效果。 【實施方式】 採用以下圖式針對本發明實施形態進行説明。第1圖 係例示本發明雙面讀取裝置的機構剖視。200526011 (1) IX. Description of the invention [Technical field to which the invention belongs] The present invention relates to an image reading device used in a scanner, a facsimile machine, or a photocopier, and particularly relates to an image sensor using a close-contact image sensor. Image reading device and double-sided image reading device. [Prior technology] In recent years, with the high performance of personal computers, not only the office but also the general home has increased the demand for fast reading of original paper. Scanners or printers form a combined multi-function machine, etc. Demand for computer peripherals that are processed in computers and have functions such as output as documents is expanding. Related to such a document reading device 'is a close-contact image sensor having a built-in CMOS sensor or an image sensor using a CCD sensor. In terms of scanner systems, there are platform scanner systems that fix the original paper and move the image sensor, or the opposite feed-in scanner system that fixes the image sensor and moves the original paper. . Any of the above-mentioned scanner systems requires as small and thin as possible the appearance of the device, and moreover, the speed of data item purchase speed must be reduced. Moreover, some of them are known to have a double-sided function for reading original paper in one pass. Therefore, for example, a scanner system for double-sided reading is known in which a document is sandwiched, and two image sensors are arranged at opposite positions, and a single-sided original is used to purchase a double-sided document. Most of the double-sided delta-subtracting devices are paper-feed scanners. Generally, for example, the original paper is sandwiched and the image sensor is arranged to face the double-sided position of the original. Xi-4-200526011 (2) How to know the double-sided reading device is similar to the image sensor shown in Figure 2 staggered in the sub-scanning direction. Figure 2 shows the conventional double-sided reading device image sensing Two sets of the original system are arranged between the cover glass 5 of the device, and the originals on both sides are used to carry the document in a fixed direction. This double-sided reading device is separated by two sets of positions, so the device is separated by a large distance of 7 units. Therefore, there is a device that cannot read κ. This kind of problem is improved. There is a mutual lens and light of the detector. The shaft and the off-center unit are arranged at positions directly above each other, and the size of the paper pressing roller is reduced (see, for example, Patent Document 1). [Patent Document 1] Japanese Patent Laid-Open q [Content of the invention] (Problems to be solved by the invention) The directivity of the double-sided bright light source disclosed in the above Patent Document 1 is wide, and even the original illumination light will arrive, so In particular, the manuscript paper enters the reading device on the opposite side and suffers from the shortcoming of light and shadow effects in the information. Show. Here is a small-scale method as shown in the figure. This structure is generally attached to the original press roller 8, and the original paper. This is because the original feed roller 7 faces the original paper in the horizontal direction of the reading device, and is disadvantageous because of the original feed roller and the size of the original paper. The image of the relative arrangement is greatly shifted in the sub-scanning direction, and it is not necessary to use a reading device for reading JP 1 1 -2 847 9 8 because the light divided outside the original photo irradiation position will be separated. Directly or penetrating the original light part, resulting in read image -5- 200526011 (3) On the other hand, in order to prevent the influence of the direct light and leak light of the above-mentioned object-side light source, the sensor The lens position is greatly staggered and improved in the sub-scanning direction, and therefore it is difficult to miniaturize even a paper feed type. Also, as described above, because the pitch of the original feeding rollers will also become longer, the problem of being unable to handle small originals still exists. (Means for Solving the Problems) The double-sided reading device of the present invention is a double-sided reading device for simultaneously reading information written on the front and back surfaces of the original paper, and includes a light source, a cover glass, and a self-focusing lens. The first and second image sensors composed of an array (Selfoc lens arrays) and a light-receiving element are arranged opposite to each other around the original paper, and from the light source of the first image sensor to the first A light-shielding member that blocks direct light is arranged between the light-receiving portions of the self-focusing lens array of the 2 image sensor. The light shielding member may be black or white. In particular, in the case of white, it is preferable to have a means for measuring the intensity of the reflected light from the reflecting member in the state of no original. (Effects of the Invention) The present invention reduces the amount of staggering in the sub-scanning direction with respect to the lens, and narrows the gap between the feed rollers of the original, thereby miniaturizing the entire apparatus. Also, small originals can be read.尙 It can avoid the influence of the illumination light from the opposite reading device, which will prevent the image information from being reflected on the back through the original paper, and prevent light leakage caused by the light passing through the original paper, resulting in -6 -200526011 (4) White spots are generated. As a result, there is an effect that a beautiful read image can be obtained. [Embodiment] An embodiment of the present invention will be described using the following drawings. FIG. 1 is a cross-sectional view illustrating a mechanism of a double-sided reading device of the present invention.
〔實施例1〕 第1圖所示係本發明雙面讀取裝置的機構剖視圖。2 套系統的圖像感測器相對向配置，並在二側配置原稿饋進 輥。1係從含有導光體單元的光源3所直接射入的照明光 (在原稿面反射並朝向透鏡的光軸）。照明光係利用蓋玻 璃5上所配置的原稿紙而部分被反射，並通過與框體6 一 體化的自聚焦透鏡陣列4而到達受光元件2。經受光元件 部進行光電轉換，而轉換爲電氣式圖像情報。[Embodiment 1] Fig. 1 is a sectional view showing a mechanism of a double-sided reading device of the present invention. The image sensors of the two systems are oppositely arranged, and the original feeding rollers are arranged on both sides. 1 is the illumination light directly reflected from the light source 3 including the light guide unit (reflected on the original surface and faces the optical axis of the lens). The illumination light is partially reflected by the original paper arranged on the cover glass 5 and reaches the light receiving element 2 through the self-focusing lens array 4 integrated with the housing 6. The optical element is subjected to photoelectric conversion and converted into electrical image information.
9係供將從本發明光源朝照明光光軸以外地方擴散的 光予以吸收或反射的遮光構件。來自光源3的光，將被遮 光構件9所遮光’形成不致進入相對向側的自聚焦透鏡陣 列4中之構造。此遮光構件9的大小在阻斷朝向相對向側 自聚焦透鏡陣列4的直射光之目的下，最好具有可阻斷相 對向側自聚焦透鏡陣列4聚光範圍內之光的大小。 以下，針對此感測器之製造方法進行説明。 在尺寸1 5 x 3 4 0 mm、厚度3 mm的蓋玻璃5之單元側 表面、與利用框體6所支撐的光源3之間，夾入利用 200526011 (5) 5 x 3 3 0 mm、厚度〇·5 mm黒色塑膠板[筒中塑膠工業股份 公司製：型號桑羅德帕亞C Η 1 7 0 0 (音譯）]貫穿板所形成 的遮光構件9。上述含導光體的光源3係端部具備有曰亞 化學工業股份公司製紅、藍、綠等三色發光用LED的本 公司自製導光體。 上述遮光構件係利用貫穿形成吻合形狀’而與框體6 吻合固定，形成不致因朝副掃描方向的偏移而對遮光特性 造成影響的形狀。 上述遮光構件的大小係依不致對相對向側自聚焦透鏡 陣列（三菱雷王股份公司（音譯）製：型號RA-88 )射入 直接光的方式，在副掃描方向具有充分的大小。此情況下 ，相對向側透鏡的口徑爲〇 . 6 im，爲.能完全覆蓋含開口 角度在內的受光區域，便設定爲寬度5 mm。 此外觀圖乃如第3圖所示。此時的遮光構件9將具有 完全阻斷照明光的能力。 受光元件2係採用CMOS型圖像感測器（佳能股份公 司製：型號6V6 )，在印刷佈線基板上黏著配置切成線狀 的複數感測器晶片。在該等在框體6中，定位固定於形成 自聚焦透鏡陣列4焦點位置的部位處。 將由該等零件所構成的圖像感測器，以蓋玻璃表面間 隔0.6 mm的相對向配置，便構成第1圖所示圖像讀取裝 置。原稿紙的位置係調整原稿饋進輥的位置，依形成相對 向圖像感測器之自聚焦透鏡陣列焦點位置的狀態，使各圖 像感測器與原稿紙表背面的待影印（掃描）深度合致。 -8- 200526011 (6) 此狀態下的出力圖像乃將相對向側的圖像感測器照明 光，穿透過原稿紙而進入的光完全阻斷，雙面均將獲得漂 亮的圖像。如前述’遮光構件的遮光率最好越高越好，穿 透過原稿紙的照明光強度若在感測器晶片感度以下，實用 上便足夠。 〔實施例2〕9 is a light shielding member for absorbing or reflecting light diffused from the light source of the present invention to a place other than the optical axis of the illumination light. The light from the light source 3 is shielded by the light shielding member 9 'so as not to enter the self-focusing lens array 4 on the opposite side. The size of the light shielding member 9 is preferably a size capable of blocking light in the light-concentrating range of the opposite-side self-focusing lens array 4 for the purpose of blocking direct light directed to the opposite-side self-focusing lens array 4. Hereinafter, a manufacturing method of the sensor will be described. Between the side surface of the cover glass 5 with a size of 1 5 x 3 40 mm and a thickness of 3 mm and the light source 3 supported by the frame 6, sandwich and use 200526011 (5) 5 x 3 3 0 mm, thickness 〇 · 5 mm black-colored plastic plate [manufactured by Tung Chung Plastic Industry Co., Ltd .: model Sandrod Paya C Η 1 7 0 0 (transliteration)] The light-shielding member 9 formed through the plate. The light guide 3 containing the light guide has an end portion of the company's self-made light guide with red, blue, and green three-color LEDs for light emission. The above-mentioned light-shielding member is formed to fit and be fixed to the frame body 6 through penetration to form a matching shape, and is formed in a shape that does not affect the light-shielding characteristics due to a shift in the sub-scanning direction. The size of the above-mentioned light-shielding member is such that the direct side light focusing lens array (manufactured by Mitsubishi Thunder King Corporation (transliteration) model: RA-88) does not have a sufficient size in the sub-scanning direction. In this case, the aperture of the side-facing lens is 0.6 im. In order to completely cover the light receiving area including the opening angle, the width is set to 5 mm. The external view is shown in Figure 3. The light shielding member 9 at this time will have the ability to completely block the illumination light. The light-receiving element 2 is a CMOS-type image sensor (manufactured by Canon Corporation: Model 6V6), and a plurality of linearly cut sensor chips are arranged on a printed wiring board. In the frame 6, it is positioned and fixed at a position where the focal position of the self-focusing lens array 4 is formed. The image sensor composed of these parts was arranged facing each other with a cover glass surface spaced 0.6 mm apart to form an image reading device as shown in Fig. 1. The position of the original paper is to adjust the position of the original feed roller, so that each image sensor and the back surface of the original paper are to be copied (scanned) according to the state of the focus position of the self-focusing lens array facing the image sensor. Deep agreement. -8- 200526011 (6) The output image in this state is to illuminate the light from the image sensor on the opposite side, and the light entering through the original paper is completely blocked, and a bright image will be obtained on both sides. As described above, the higher the light-shielding rate of the light-shielding member, the better. The intensity of the illumination light passing through the original paper is lower than the sensor wafer sensitivity, which is practically sufficient. [Example 2]
除遮光構件9係採用對實施例1的遮光構件9，採用 含有氧化鈦粉末的白色顔料塗料進行塗佈之物質以外，其 餘均如同實施例1，構成雙面讀取裝置。阻斷光源朝相對 向圖像感測器的直接光之效果，完全如同上述實施例1。 採用白色顔料塗料（鈦工業股份公司製：型號KA-10 )，利用網版印刷塗佈成厚度20 // m。此狀態下，完全未 看到底層基板的黒色，屬於隱蔽力十足的膜厚。在此構造 中，得知阻斷來自光源直射光的效果亦十足。The light-shielding member 9 is the same as that of Example 1 except that the light-shielding member 9 of Example 1 was coated with a white pigment paint containing titanium oxide powder, and a double-sided reading device was constructed. The effect of blocking the direct light from the light source toward the opposite image sensor is exactly the same as that of the first embodiment. Use white pigment coating (made by Titanium Industry Co., Ltd .: model KA-10), and apply screen printing to a thickness of 20 // m. In this state, the black color of the underlying substrate is not seen at all, which is a film thickness with full concealment. In this structure, it is also known that the effect of blocking direct light from a light source is also very effective.
另外，利用此遮光構件9表面爲白色，在未放置原稿 紙的狀態下，利用相對向側光源照明遮光構件表面，並由 各受光元件2接收此反射光。依此針對2套系統的各圖像 感測器，測定白狀態的出力信號強度，並以其爲白色基準 強度，可利用於出力信號的強度修正方面。 在第1圖中，遮光構件9的顏色可爲黒色，亦可爲白 色。若屬於構成直接光並未進入相對向側圖像感測器的透 鏡中之構造的話便可，可爲任何者。依較薄厚度便具有效 果的構件，最好爲金屬，此情況下，亦可對蓋玻璃基板上 200526011 (7) ，利用濺鍍法形成金屬薄膜。 再者，材料、材質最好屬於不致隨使用時的按押而使 自聚焦透鏡陣列與蓋玻璃間的距離產生變化者’最好屬於 機械式安定性。 (比較例） 從實施例1所示構造，製成無遮光構件9構造的雙面 - 讀取裝置。當使用普通辦公室紙張，施行雙面讀取時，來 自對向側的圖像感測器直射光將穿透過原稿紙，並射入自 聚焦透鏡陣列中。 因而將出現表面的文字資訊被部分抹除、映入背面文 字資訊、以及讀取圖像整體變空白（將此稱「白點」）現 象，畫質極爲差劣。 〔産業上可利用性〕In addition, the surface of the light-shielding member 9 is white, and the surface of the light-shielding member is illuminated by the opposite side light source in a state where the original paper is not placed, and the light-receiving elements 2 receive the reflected light. Based on this, for each image sensor of the two systems, the intensity of the output signal in the white state is measured, and this is used as the white reference intensity, which can be used for the intensity correction of the output signal. In the first figure, the color of the light shielding member 9 may be black or white. Any structure may be used as long as it is a structure that constitutes direct light and does not enter the lens of the opposite side image sensor. A thin-walled component is effective, preferably metal. In this case, a metal film can also be formed on the cover glass substrate 200526011 (7) by sputtering. Moreover, it is preferable that the material and the material are those which do not change the distance between the self-focusing lens array and the cover glass with the pressing during use, and are preferably mechanical stability. (Comparative example) From the structure shown in Example 1, a double-sided-reading device having a structure without a light shielding member 9 was manufactured. When ordinary office paper is used for double-sided reading, direct light from the image sensor on the opposite side will pass through the original paper and enter the self-focusing lens array. As a result, the text information on the surface is partially erased, reflected on the back text information, and the entire read image becomes blank (this is called "white point"), and the image quality is extremely poor. [Industrial availability]
本發明物在饋送原稿式的雙面同時圖像讀取裝置中， 使用於欲小型化的讀取裝置，對傳真機、掃描器等乃屬有 效技術。 【圖式簡單說明】 第1圖係本發明雙面同時圖像讀取裝置之機構例示剖 視圖。遮光構件位置可在玻璃上面、亦可在背面、亦可一 體成形。 第2圖係習知雙面對向同時讀取型讀取裝置之機構例 -10- 200526011 (8) 示剖視圖。 第3圖係遮光構件組裝於框體中的狀態外觀圖。 【主要元件符號說明】 1 :照明光 2 :受光元件 3 :光源The present invention is an effective technique for a facsimile machine, a scanner, and the like in a double-sided simultaneous image reading device of a document feeding type, which is used for a reading device to be miniaturized. [Brief Description of the Drawings] FIG. 1 is an exemplary cross-sectional view of a mechanism of a double-sided simultaneous image reading device of the present invention. The position of the light shielding member may be on the glass, on the back, or it may be integrally formed. Fig. 2 is a conventional example of the mechanism of a double-sided facing simultaneous reading type reading device -10- 200526011 (8) is a sectional view. FIG. 3 is an external view of a state where the light shielding member is assembled in the frame. [Description of main component symbols] 1: Illumination light 2: Light receiving element 3: Light source
4 =自聚焦透鏡陣列 5 :蓋玻璃 6 :框體 7 :原稿饋進輥 8 :原稿按押輥 9 :遮光構件4 = Self-focusing lens array 5: Cover glass 6: Frame body 7: Original feed roller 8: Original pressing roller 9: Light blocking member
-11 --11-