1277004 九、發明說明： 【發明所屬之技術領域】1277004 IX. Description of the invention: [Technical field to which the invention belongs]
本發明係有關一種微小且薄型接觸式影像感測裝 置，特別是關於一種藉由一個微小且薄型之指紋φ恩給 機構，結合條型感測器以達到擷取指紋之影像。 J 【先前技術】SUMMARY OF THE INVENTION The present invention is directed to a small and thin contact image sensing device, and more particularly to an image that captures a fingerprint by a strip-shaped sensor by means of a tiny and thin fingerprint sensor. J [Prior Art]
科技曰益發達，許多的電子產品也漸漸的一一出現在 人類的生活周遭，為了方便使用者隨身攜帶，也因此有越 來越多的小型電子產品問世，然因小型電子產品的小型 化，也容易造成使用者一不小心便將小型電子產品遺失， 而使得使用小型電子產品的安全性降低。 而為了改善小型電子產品遺失時，避免個人資料外 戌的缺失，因此便漸漸的有人研發出利用人類每個人獨一 無二、且無法偽造的指紋來作為應用在電子產品上的辨識 工具〇 美國專利公開號U.S· 6, 259, 108 6^提出一種指紋影 像光學輸入裝置’包括將指紋放置在一透明平台上，並利 用一光源照射，且利用一影像感測器掃描一指紋，並且利 用一漸變折射率（Graduated Refractive Index ; GRIN) 條狀透鏡聚焦指紋影像，並投射至一線性陣列感測器成 像’而達到辨識效果。另，美國專利公開號U.S. 6, 538, 243 雖然提出幾種方法來改善打光，但在微小且薄型的系統大 小要求下，其有效的實現性仍有待開發。 有鐘於此，本發明係針對上述之困擾，提出一種微 5 1277004 小且薄型接觸式影像感測裝置，以改善上述之缺失。 【發明内容】 有鑑於微型化產品在人類生活所佔的重要性日漸成 長，因此本發明提出一種微型且超薄搭配條型感測器之指 紋辨識機構。本發明提出一種微小且薄型接觸式影像感剛 裝置，藉由一作為指紋擷取而呈條狀之指紋接觸面，一光 導管，一個或多個SMHLED構成之光源所產生之光線均句 分射於指紋接觸面上，及一個可取得漸變折射率式之條烈 ^ρι 式柱狀透鏡陣列，而來產生指紋影像並成形於條式感測 器，配合手指移動透過軟體處理將所得之片段條狀影像重 組成完整的指紋影像。 本發明之一種微小且薄型接觸式影像感測裝置，因其 結構所包含多彎折式光導管的條狀指紋影像裝置，而使裝 置微型化便於應用於手機、隨身碟、掃描器、滑鼠、個人 行動助理或汽車鑰匙等電子產品0 Φ 【實施方式】 請配合第一圖、第二圖、第三圖、第四圖、第五圖、 第六圖、暨附件一所示，本發明之微小且薄型接觸式影像 感測裝置，主要係由··一可鑲嵌於印刷電路板2 i上之光 源2、光導管3、鏡頭4及條型感測器5組成，其中，光 導管3呈多彎折狀，而由入射面3 i、第一光線導引面3 2、指紋接觸面33、第二光線導引面34及影像反射面 3 5所組成，並可將其定位組合於一支撐基座6上，俾以 降低影像感測裝置之體積（如附件一所示，當可清楚 1277004 看出其整體裝置之體積乃相當小）。 請參閱第三圖（光導管3之第一光線導引面3 2採折 面方式與指紋接觸面33搭配作内部全反射）、第四圖（另 一光導管3之第一光線導引面3 2採折面方式與指紋接觸 面搭配作内部全反射）、第五圖（光導管3之第一光線導 引面3 2採曲面方式與指紋接觸面33搭配作内部全反 射）、暨第六圖（另一光導管3之第一光線導引面32採 曲面方式與指紋接觸面33搭配作内部全反射）所示，其係 本發明之數個實施例，藉由一個或多個SM-LED光源2以直 立方式表面鑲嵌於印刷電路版2 1上，令光線射入光導管 3之入射面3 1，經第一光線導引面3 2之導引、集光及 反射，並利用内部全反射方式以提高指紋影像解析度及增 加暗區與亮區間之對比，而反射至指紋接觸面3 3，配合 將手指或腳指7之指紋部貼於該指紋接觸面33上並作移 動，令指紋隆起處接觸到呈條狀區域之指紋感觸面3 3大 部分的光線散射至不同角度而形成暗區，而指紋凹陷之區 • 域因未接觸到指紋接觸面33，形成内部全反射而產生亮 區，使形成一明暗對比之數條條狀灰階影像，並經過第二 光線導引面3 4導引而進入一由條列式柱狀透鏡所構成之 鏡頭4，使該等條狀灰階影像聚焦後再入射到光導管3之 影像反射鏡3 5，最後反射到亦設置於印刷電路板2 1上 之條型感測器5,再經印刷電路板2；[之電子電路訊號處 理整合為完整之指紋影像，以達到辨識目的。 請參閱第二圖-A、及第三圖_B所示，為了達到光均勻 7 1277004 化之目的，使LED光源2發出的光線經過多彎折的光導管 3導引，經過多次反射來增長光的有效行進長度，以使其 長度遠大於光口徑之大小，可進一步在光導管3中之第一 光線導引面3 2之表面加入呈規則性之槽3 2 1 (如 第三圖-A所示）或非規性之”V”槽、或呈規則之光擴散球 點3 2 2 (如第三圖-B所示）或非規則之光擴散球點，來 增強光擴散效果之設計以增加光之有效路徑長度，並使呈 條型區域之指紋接觸平面3 3可得到更亮更均勻的照明效 果。 【圖式簡單說明】 第一圖：係本發明裝置之立體分解示意圖。 第二圖：係本發明裝置之組合立體外觀示意圖。 第三圖：係本發明裝置之組合剖面實施示意圖（光導管之 第一光線導引面採折面方式與指紋接觸面搭配作 内部全反射）。 寒 第三圖-A ··係本發明裝置之局部外觀示意圖（位第一光線 導引面處）。 第三圖-B ··係本發明裝置之局部外觀示意圖（位第一光線 導引面處）。 第四圖：係本發明裝置之組合剖面實施示意圖（另一光導 管之第一光線導引面採折面方式與指紋接觸面搭 配作内部全反射）。 第五圖··係本發明裝置之組合剖面實施示意圖（光導管之 8 1277004 第一光線導引面採曲面方式與指紋接觸面搭配作 内部全反射）。 第六圖：係本發明裝置之組合剖面實施示意圖（另一光導 管之第一光線導引面採曲面方式與指紋接觸面搭 配作内部全反射）。 附件一：係本發明裝置具體實施之實物照片。 【主要元件符號說明】The technology benefits are developed, and many electronic products are gradually appearing around human life. In order to facilitate users to carry around, more and more small electronic products are coming out. However, due to the miniaturization of small electronic products, It is also easy for a user to accidentally lose a small electronic product, which reduces the safety of using a small electronic product. In order to improve the loss of personal data in order to improve the loss of small electronic products, it has gradually developed a fingerprint that is unique and unforgeable for everyone to use as an identification tool for electronic products. US Patent Publication No. US 6, 259, 108 6^ proposes a fingerprint image optical input device 'comprising a fingerprint on a transparent platform, and illuminating with a light source, and scanning a fingerprint with an image sensor, and using a graded refractive index (Graduated Refractive Index; GRIN) The strip lens focuses the fingerprint image and projects it onto a linear array sensor to achieve recognition. In addition, U.S. Patent Publication No. U.S. 6, 538, 243, although several methods are proposed to improve the lighting, the effective implementation of the system is still to be developed under the requirements of a small and thin system. In view of the above, the present invention proposes a micro 5 1277004 small and thin contact image sensing device to improve the above-mentioned deficiency. SUMMARY OF THE INVENTION In view of the growing importance of miniaturized products in human life, the present invention proposes a fingerprint recognition mechanism for a miniature and ultra-thin strip sensor. The invention provides a microscopic and thin contact image sensing device, wherein a light generated by a light source formed by a light source formed by a light source and a light source formed by one or more SMH LEDs is taken as a fingerprint. On the fingerprint contact surface, and a stripe lens array capable of obtaining a gradient index type, a fingerprint image is generated and formed on the strip sensor, and the resulting fragment strip is processed by the soft body processing with the finger movement. The image is recombined into a complete fingerprint image. The invention relates to a small and thin contact image sensing device, which is characterized in that the structure comprises a strip-shaped fingerprint device of a plurality of bent light pipes, and the device is miniaturized and is conveniently applied to a mobile phone, a flash drive, a scanner, a mouse. Electronic product such as personal mobile assistant or car key 0 Φ [Embodiment] Please cooperate with the first figure, the second figure, the third figure, the fourth figure, the fifth figure, the sixth figure, and the annex one, the present invention The micro and thin contact image sensing device is mainly composed of a light source 2, a light pipe 3, a lens 4 and a strip sensor 5 which can be mounted on the printed circuit board 2 i, wherein the light pipe 3 The utility model has a plurality of bending shapes, and is composed of the incident surface 3 i , the first light guiding surface 3 2 , the fingerprint contact surface 33 , the second light guiding surface 34 and the image reflecting surface 35 , and can be combined and positioned A support base 6 is provided to reduce the volume of the image sensing device (as shown in Annex I, when it can be clearly seen that the volume of the overall device is quite small). Please refer to the third figure (the first light guiding surface of the light pipe 3 is 2, the folding surface is combined with the fingerprint contact surface 33 for internal total reflection), and the fourth picture (the first light guiding surface of the other light pipe 3) 3 2 Folding surface mode and fingerprint contact surface for internal total reflection), the fifth picture (the first light guiding surface of the light pipe 3 is 2, the surface is combined with the fingerprint contact surface 33 for internal total reflection), and the first The six figures (the first light guiding surface 32 of the other light pipe 3 is combined with the fingerprint contact surface 33 for internal total reflection) are shown as several embodiments of the present invention, by one or more SM The LED light source 2 is mounted on the printed circuit board 21 in an upright manner, and the light is incident on the incident surface 31 of the light guide 3, guided, collected and reflected by the first light guiding surface 32, and utilized. The internal total reflection mode is used to improve the resolution of the fingerprint image and increase the contrast between the dark area and the bright area, and is reflected to the fingerprint contact surface 33, and the fingerprint portion of the finger or the finger 7 is attached to the fingerprint contact surface 33 and moved. , so that the fingerprint bulge is in contact with the fingerprint-sensing surface of the strip-shaped area. Part of the light is scattered to different angles to form a dark area, and the area of the depressed area of the fingerprint is not contacted with the fingerprint contact surface 33, and internal total reflection is formed to generate a bright area, so that a strip of gray-scale image forming a light and dark contrast is formed. And guided by the second light guiding surface 34 to enter a lens 4 composed of a columnar lenticular lens, so that the strip-shaped gray-scale images are focused and then incident on the image mirror 3 of the light guide 3 5, finally reflected to the strip sensor 5 also disposed on the printed circuit board 21, and then through the printed circuit board 2; [the electronic circuit signal processing integrated into a complete fingerprint image for identification purposes. Referring to FIG. 2A and FIG. 3B, in order to achieve the purpose of uniform light 7 1277004, the light emitted by the LED light source 2 is guided by the multi-bent light pipe 3, and after multiple reflections. Increasing the effective travel length of the light so that its length is much larger than the diameter of the optical aperture, and further adding a regular groove 3 2 1 to the surface of the first light guiding surface 32 in the light pipe 3 (as shown in the third figure) -A) or a non-regular "V" slot, or a regular light diffusing ball point 3 2 2 (as shown in Figure 3B) or an irregular light diffusing ball point to enhance light diffusion The design is to increase the effective path length of the light, and the fingerprint contact plane 3 3 in the strip-shaped area can obtain a brighter and more uniform illumination effect. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective exploded view of the apparatus of the present invention. Second drawing: a schematic view of the combined stereoscopic appearance of the device of the present invention. The third figure is a schematic diagram of the combined cross-section of the device of the present invention (the first light guiding surface of the light pipe is combined with the fingerprint contact surface for internal total reflection). Cold The third figure-A is a partial appearance view of the device of the present invention (at the first light guiding surface). Fig. 3 - B is a partial appearance view of the apparatus of the present invention (at the first light guiding surface). Fig. 4 is a schematic view showing the implementation of the combined cross-section of the device of the present invention (the first light guiding surface of the other light guiding surface is combined with the fingerprint contact surface for internal total reflection). The fifth figure is a schematic diagram of the combined cross-section of the device of the present invention (light pipe 8 1277004 first light guiding surface adopts curved surface mode and fingerprint contact surface is matched for internal total reflection). Fig. 6 is a schematic view showing the combined cross-section of the device of the present invention (the first light guiding surface of the other light pipe adopts a curved surface method and the fingerprint contact surface is matched for internal total reflection). Annex I: A photograph of the actual implementation of the device of the present invention. [Main component symbol description]
(35)影像反射面 (6)支撐基座 (2)光源 （21)印刷電路板 （3)光導管 (31)入射面（32)第一光線導引面（321) V槽 ( 322)球點 （33)指紋接觸面 (34)第二光線導引面 (4)鏡頭 （5)條型感測器 (7)手指或腳指(35) Image reflection surface (6) Support base (2) Light source (21) Printed circuit board (3) Light guide (31) Incidence surface (32) First light guide surface (321) V-groove (322) ball Point (33) Fingerprint contact surface (34) Second light guiding surface (4) Lens (5) Strip sensor (7) Finger or toe