WO2011015006A1 - 一种接触式图像传感器 - Google Patents

一种接触式图像传感器 Download PDF

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Publication number
WO2011015006A1
WO2011015006A1 PCT/CN2009/075321 CN2009075321W WO2011015006A1 WO 2011015006 A1 WO2011015006 A1 WO 2011015006A1 CN 2009075321 W CN2009075321 W CN 2009075321W WO 2011015006 A1 WO2011015006 A1 WO 2011015006A1
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WO
WIPO (PCT)
Prior art keywords
light guide
light
image sensor
light source
groove
Prior art date
Application number
PCT/CN2009/075321
Other languages
English (en)
French (fr)
Inventor
泽江哲则
刘振翔
Original Assignee
威海华菱光电有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 威海华菱光电有限公司 filed Critical 威海华菱光电有限公司
Publication of WO2011015006A1 publication Critical patent/WO2011015006A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1017—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components the main-scanning components remaining positionally invariant with respect to one another in the sub-scanning direction
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
    • H04N1/031—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
    • H04N1/0313—Direct contact pick-up heads, i.e. heads having no array of elements to project the scanned image elements onto the photodectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
    • H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
    • H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
    • H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
    • H04N2201/03108—Components of integral heads
    • H04N2201/03112—Light source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
    • H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
    • H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
    • H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
    • H04N2201/03108—Components of integral heads
    • H04N2201/03129—Transparent cover or transparent document support mounted on the head

Definitions

  • the present invention relates to an image reading apparatus, and more particularly to an ultraviolet light linear light source which is a light guide type contact image sensor.
  • the existing contact image sensor with UV information recognition function such as the bank system banknote anti-counterfeiting
  • a circuit board under the frame and a photoelectric conversion chip is arranged on the circuit board, and the photoelectric conversion chip is mounted above.
  • the linear light source may be disposed on one side of the lens or on both sides of the lens.
  • the glass plate on which the original is mounted is arranged above the frame.
  • One side or both sides of the lens in the prior art The linear light source is provided with a linear light source that emits ultraviolet light, and the ultraviolet light linear light source usually adopts an LED array type.
  • the shortcoming of the array type ultraviolet light linear light source is that the number of ultraviolet LEDs is large, the cost is high, the uniformity is poor, and the power consumption is large.
  • the price of mass production of contact image sensors fabricated using array-type ultraviolet light linear sources is difficult for users to accept.
  • the cost of array-type ultraviolet light linear light sources accounts for more than 50% of the cost of contact image sensors, and the source of light Uniformity is ensured by the arrangement density of LEDs. The higher the LED density, the higher the cost.
  • the object of the present invention is to overcome the technical problems of high cost, poor uniformity and large power consumption of the prior art, and to provide a high uniformity ultraviolet light linear light source contact image sensor.
  • a contact image sensor with a frame, a circuit board under the frame, a photoelectric conversion chip on the circuit board, a lens mounted on the photoelectric conversion chip, a light source on the side of the lens, and a glass plate above the frame
  • the light source disposed on the side of the lens has a light guide type ultraviolet light linear light source, and the light guide type ultraviolet light
  • the linear light source is composed of an ultraviolet LED, a light guide body, a light guide plate and a circuit board.
  • the light guide body is provided with a light guiding pattern, and the light guiding pattern is a groove provided on the light guiding body.
  • the groove surface of the groove of the present invention is provided with a mirror ink layer, and the mirror ink layer is generally applied to the groove surface by printing or filling to increase the intensity of transmitting ultraviolet light.
  • the groove of the present invention is spherical, conical, etc., and the shape and size of the groove on the light guide body are set according to a certain regularity, and the intensity of the ultraviolet light transmitted by the light guide body is adjusted by the size or spacing of the groove. , to ensure the uniformity of the light source output.
  • the invention provides an illuminant through the end of the light guide body, and a concave light guiding pattern is arranged on the light guide body to realize
  • the same function of the LED array type ultraviolet light linear light source, the cost and power consumption of the light guide type ultraviolet light linear light source are less than one third of the existing array type ultraviolet light linear light source, and have low power consumption, high uniformity, etc. advantage.
  • Figure 1 is a cross-sectional view of the present invention.
  • FIG. 2 is a schematic view of a light guiding body in the present invention.
  • FIG. 3, FIG. 4, and FIG. 5 are schematic diagrams showing the groove size and pitch arrangement described in the present invention.
  • Figure 6 is a schematic view of the shape of the groove described in the present invention.
  • a contact image sensor As shown in FIG. 1 and FIG. 2, a contact image sensor, a frame 1, a circuit board 7 is disposed under the frame 1, a photoelectric conversion chip 6 is disposed on the circuit board 7, and a lens is mounted on the photoelectric conversion chip 6. 4, the light source 2 is disposed on the side of the lens 4, and the glass plate 3 is disposed above the frame 1.
  • the side surface of the lens 4 of the present invention is provided with an ultraviolet light source composed of an ultraviolet LED 5-1, an LED circuit board 5-2, a light guide 5-3, a light guide plate 5-4, and a light guiding pattern 5-5.
  • the light guiding pattern 5-5 of the present invention is realized by providing a groove structure on the light guiding body 5-3, filling or printing a mirror ink layer on the groove structure.
  • the groove structure may be an equal-sized groove formed on the light guide body at different pitches which are changed according to a certain regularity, or may be arranged at the same pitch and different sizes of grooves which are changed according to a certain regularity, or may be a certain Grooves of different sizes that vary in regular intervals with different regularities.
  • the groove may be spherical, conical or the like.
  • the output intensity of the light is adjusted by the pitch of the groove portion or the concave size of the groove portion to ensure the uniformity of the light source intensity output.
  • the mirror ink may be filled in the groove portion or may be applied to the groove wall.
  • the cost and power consumption of the present invention are less than one-third of the existing array of ultraviolet light linear light sources, and have the advantages of low cost, low power consumption, high uniformity and the like.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Planar Illumination Modules (AREA)
  • Facsimile Scanning Arrangements (AREA)

Description

说明书
Title of Invention:一种接触式图像传感器 技术领域
技术领域
[1] 本发明涉及图像的读取装置， 详细地讲是一种紫外光线性光源为导光体式的接 触式图像传感器。
背景技术
背景技术
[2] 我们知道， 现有的诸如银行系统纸币防伪使用的具有紫外信息识别功能的接触 式图像传感器， 是在框架下方设有线路板， 线路板上设有光电转换芯片， 光电 转换芯片上方安装有透镜， 透镜的侧面设有线性光源， 线性光源可以设在透镜 的一侧， 也可以设在透镜的两侧， 框架上方设有搭载原稿的玻璃板， 现有技术 中透镜一侧或者两侧设有的线性光源中有发射紫外光的线性光源， 紫外光线性 光源通常釆用 LED阵列式，阵列式紫外光线性光源的缺点是使用紫外 LED数量多 ， 成本高、 均一性差、 功耗大， 使用阵列形式紫外光线性光源制作的接触式图 像传感器批量生产的价格， 用户很难接受， 阵列形式的紫外光线性光源的成本 占接触式图像传感器成本要在百分之五十以上， 并且光源的均一性依靠 LED的排 列密度来保证， LED密度越大成本越高。
对发明的公开
技术问题
[3] 本发明的目的是克服现有产品成本高、 均一性差、 功耗大的技术问题， 提供一 种高均一性紫外光线性光源接触式图像传感器。
技术解决方案
[4] 一种接触式图像传感器， 设有框架， 框架下方设有线路板， 线路板上设有光电 转换芯片， 光电转换芯片上方安装有透镜， 透镜侧面设有光源， 框架上方设有 玻璃板， 透镜侧面设有的光源中有导光体式紫外光线性光源， 导光体式紫外光 线性光源由紫外 LED、 导光体、 导光板和电路板组成， 导光体上设有导光图形， 导光图形是设在导光体上的凹槽。
[5] 本发明所述的凹槽的槽面上设有镜面油墨层， 镜面油墨层一般釆用印刷或填充 的方法涂在槽面上， 以提高传递紫外光的强度。
[6] 本发明所述的凹槽呈球形、 圆锥形等， 导光体上的凹槽形状和大小按一定规律 设置， 导光体传递紫外光的强度是以凹槽的大小或间距来调节， 保证光源输出 的均一性。
有益效果
[7] 本发明通过导光体端部设置发光体， 导光体上设置凹形导光图形的形式实现与
LED阵列式紫外光线性光源相同的功能， 导光体式紫外光线性光源的成本和功耗 均为现有阵列式紫外光线性光源的三分之一以下， 并具有功耗低、 高均一性等 优点。
附图说明
[8] 图 1为本发明的剖视图。
[9] 图 2为本发明中导光体的示意图。
[10] 图 3、 图 4、 图 5为本发明中所述的凹槽尺寸和间距设置的示意图。
[11] 图 6为本发明中所述的凹槽形状的示意图。
[12] 图中标记： 框架 1、 光源 2、 玻璃板 3、 透镜 4、 紫外 LED5-1、 LED电路板 5-2、 导光体 5-3、 导光板 5-4、 导光图形 5-5、 光电转换芯片 6、 线路板 7。
本发明的最佳实施方式
[13] 下面结合附图和实施例对本发明作进一步说明。
[14] 如图 1、 图 2所示， 一种接触式图像传感器， 框架 1， 框架 1下方设有线路板 7， 线路板 7上设有光电转换芯片 6， 光电转换芯片 6上方安装有透镜 4， 透镜 4侧面设 有光源 2， 框架 1上方设有玻璃板 3， 上述与现有技术相同， 属本领域技术人员所 应知， 此不赞述。 本发明的透镜 4侧面设有由紫外 LED5-1、 LED电路板 5-2、 导 光体 5-3、 导光板 5-4和导光图形 5-5组成的紫外线性光源。
[15] 本发明所说的导光图形 5-5是通过在导光体 5-3上设置凹槽结构， 在凹槽结构上 填充或印刷镜面油墨层来实现的。 [16] 凹槽结构可以是在导光体上制作成按一定规律变化的不同间距的等尺寸凹槽， 也可以按相同间距排列的按一定规律变化的不同尺寸凹槽， 还可以是按一定规 律变化的不同间距按一定规律变化的不同尺寸凹槽。 所述的凹槽可以是球形、 圆锥形等。
[17] 通过凹槽部位的间距或凹槽部位的凹形尺寸来调节光的输出强度， 保证光源强 度输出的均一性。
[18] 所述镜面油墨可以填充于凹槽部位， 也可以是涂覆于凹槽壁上。
[19] 本发明的成本和功耗均为现有阵列形式紫外光线性光源的三分之一以下， 具有 成本低廉、 功耗低、 高均一性等优点。

Claims

权利要求书
一种接触式图像传感器， 设有框架， 框架下方设有线路板， 线路 板上设有光电转换芯片， 光电转换芯片上方安装有透镜， 透镜侧 面设有光源， 框架上方设有玻璃板， 透镜侧面设有的光源中有导 光体式紫外光线性光源， 导光体式紫外光线性光源由紫外 LED、 导光体、 导光板和电路板组成， 其特征在于导光体上设有导光图 形， 导光图形是设在导光体上的凹槽。
根据权利要求 1所述的一种接触式图像传感器， 其特征在于凹槽的 槽面上设有镜面油墨层。
根据权利要求 1所述的一种接触式图像传感器， 其特征在于凹槽呈 球形。
根据权利要求 1所述的一种接触式图像传感器， 其特征在于凹槽呈 圆锥形。
根据权利要求 1所述的一种接触式图像传感器， 其特征在于导光体 上的凹槽尺寸和间距按规律设置。
PCT/CN2009/075321 2009-08-07 2009-12-04 一种接触式图像传感器 WO2011015006A1 (zh)

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Application Number Priority Date Filing Date Title
CN200910305379.6 2009-08-07
CN200910305379.6A CN102034295B (zh) 2009-08-07 2009-08-07 一种接触式图像传感器

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Cited By (1)

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CN109657655A (zh) * 2019-01-30 2019-04-19 吴长汶 一种五行脸分类方法及存储设备

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CN103546659A (zh) * 2013-10-31 2014-01-29 威海华菱光电股份有限公司 用于接触式图像传感器的光源单元和接触式图像传感器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN102034295A (zh) 2011-04-27

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