TW201915386A - Reflector plate module capable of uniformly distributing reflected light to illuminate the fingerprint identification area - Google Patents
Reflector plate module capable of uniformly distributing reflected light to illuminate the fingerprint identification area Download PDFInfo
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本發明係為一種反射片模組，尤指一種應用於指紋辨識的反射片模組。 The invention is a reflective sheet module, in particular to a reflective sheet module applied to fingerprint recognition.
隨著科技的發展及個人隱私的重視，以往在科技產品上的密碼鎖已不敷使用，因此，指紋辨識解碼開始裝設在各種科技產品中，藉由指紋所具有的獨特性以提升安全性，亦可同時解決傳統解鎖時輸入密碼的麻煩，增加便利性。 With the development of technology and the importance of personal privacy, the password locks on technology products have not been used in the past. Therefore, fingerprint identification decoding has begun to be installed in various technology products, and the uniqueness of fingerprints is used to improve security. It can also solve the trouble of entering a password when the traditional unlocking, and increase the convenience.
目前的指紋辨識裝置可區分為光學式、電容式、超音波式及熱感式。以光學式指紋辨識裝置為例，其原理如後。手指的指紋是由多條不規則的脊紋與溝紋組合而成，當手指按壓於指紋辨識裝置時，脊紋的位置會接觸指紋辨識裝置，而溝紋的位置則否。脊紋的位置會直接將光束反射至影像擷取元件，進而形成亮區；而溝紋的位置，則因為照射至溝紋的光束會在溝紋內進行多次反射才將光束傳遞至影像擷取元件，因而形成暗區。藉此，影像擷取元件所接收到的光則會對應指紋的脊紋與溝紋形成明暗交錯的條紋圖案，此即為指紋影像，再經由演算法計算對應指紋影像的資訊，便可進行指紋辨識。 Current fingerprint identification devices can be classified into optical, capacitive, ultrasonic, and thermal sensing. Taking an optical fingerprint identification device as an example, the principle is as follows. The fingerprint of the finger is composed of a plurality of irregular ridges and grooves. When the finger is pressed against the fingerprint recognition device, the position of the ridge will contact the fingerprint recognition device, and the position of the groove is not. The position of the ridges directly reflects the beam to the image capturing element, which in turn forms a bright area; and the position of the groove, because the beam that illuminates the groove will be reflected multiple times within the groove to transmit the beam to the image. The components are taken, thus forming a dark area. Thereby, the light received by the image capturing component forms a stripe pattern of light and dark interlaced corresponding to the ridges and grooves of the fingerprint, which is a fingerprint image, and then the information corresponding to the fingerprint image is calculated by an algorithm to perform fingerprint identification. .
傳統的光學式指紋辨識有兩種可能，一種為將光源斜放的方式，另一種為僅利用邊緣之光線。運用斜放之方式，雖可以直接改善光路， 但因在小模組(如手機)中，要將光源達到斜放是相當困難的；而僅利用邊緣的光線，則不僅有光強度過低，另還有變形的問題。如台灣發明專利公告號I547884提出「指紋辨識模組」，其包含蓋板、指紋辨識器、第一黏著層以及至少一光源。蓋板具有內表面、與內表面相對的外表面以及多個位於內表面的微結構。指紋辨識器位於微結構下且藉由第一黏著層貼附於微結構，所述至少一光源位於內表面下且位於指紋辨識器旁。此方式為光源設於指紋辨識器旁，利用光源的光束直接藉由手指指紋的反射至微結構，此處的微結構係屬於增加入射光強度，讓設於為結構下方的指紋辨識器執行辨識，但此種直接照射的方式易造成影像扭曲及鬼影的問題，即使微結構可以增加光強度，但因原本照射在指紋處的光並不均勻，因此即使增加光強度也無法增加解析度，進而影響指紋辨識的精確度，故此是以確有加以改善之必要課題。 There are two possibilities for traditional optical fingerprinting, one is to slant the light source, and the other is to use only the edge of the light. Although the optical path can be directly improved by the oblique method, it is quite difficult to slant the light source in a small module (such as a mobile phone); and only the light of the edge is used, not only the light intensity is too low, There are also problems with the deformation. For example, Taiwan Invention Patent Publication No. I547884 proposes a "fingerprint recognition module" comprising a cover, a fingerprint identifier, a first adhesive layer and at least one light source. The cover has an inner surface, an outer surface opposite the inner surface, and a plurality of microstructures on the inner surface. The fingerprint identifier is located under the microstructure and attached to the microstructure by a first adhesive layer, the at least one light source being located below the inner surface and adjacent to the fingerprint identifier. In this way, the light source is disposed beside the fingerprint identifier, and the light beam of the light source is directly reflected by the fingerprint of the finger to the microstructure. The microstructure here is to increase the intensity of the incident light, and the fingerprint identifier disposed under the structure is subjected to identification. However, this direct illumination method is liable to cause image distortion and ghosting. Even if the microstructure can increase the light intensity, the light originally irradiated at the fingerprint is not uniform, so even if the light intensity is increased, the resolution cannot be increased. In turn, the accuracy of fingerprint recognition is affected, so it is necessary to improve.
有鑑於上述課題，依據本發明係一種反射片模組，其可裝置於指紋辨識模組中，當光源發出出射光進入反射片模組中，經由反射片模組對此光線調制，最後反射均勻光線至指紋辨識區，進而反射清晰均勻之光線至影像擷取元件。 In view of the above problems, according to the present invention, a reflective sheet module can be disposed in a fingerprint identification module. When a light source emits light into a reflective sheet module, the light is modulated by the reflective sheet module, and finally reflected uniformly. Light is transmitted to the fingerprint recognition area to reflect clear and uniform light to the image capture component.
為達上述目的與功效，本發明提供一種反射片模組，其包含第一反射片及第二反射片。第一反射片設於向上發光之光源的發光範圍內，而第二反射片設在電路板上，於第二反射片面對該第一反射片的一面上設有第一微結構體。當光源發射出射光於第一反射片上並反射出第一反射光，而第一反射光的光路行經第一微結構體，藉由第一微結構體的結構 設計，將第一反射光反射形成均勻分佈之第二反射光朝向指紋辨識區，使得於指紋辨識區之手指能大面積均勻地被照射，因此手指指紋的脊紋溝紋能夠均勻地被反射形成第三反射光反射至影像擷取單元。 To achieve the above objects and effects, the present invention provides a reflective sheet module including a first reflective sheet and a second reflective sheet. The first reflective sheet is disposed in the light emitting range of the upwardly illuminating light source, and the second reflective sheet is disposed on the circuit board, and the first microstructured body is disposed on a side of the second reflective sheet facing the first reflective sheet. When the light source emits light on the first reflective sheet and reflects the first reflected light, and the optical path of the first reflected light passes through the first microstructure, the first reflected light is reflected by the structural design of the first microstructure. The evenly distributed second reflected light faces the fingerprint recognition area, so that the finger in the fingerprint recognition area can be uniformly illuminated over a large area, so that the ridge groove of the finger fingerprint can be uniformly reflected to form the third reflected light to be reflected to the image capture. unit.
其中，指紋辨識區與第一反射片間更包含第一基板，且於第一反射片與第二反射片間亦設有第二基板。於此反射片模組中，具有填充物將第一反射片、第二反射片、第一基板及第二基板間的空隙填滿，第一基板、第二基板及填充物可維持光線穩定行進，避免因空氣的折射率不同而影響光路。 The first substrate is further included between the fingerprint recognition area and the first reflective sheet, and the second substrate is also disposed between the first reflective sheet and the second reflective sheet. In the reflector module, the filler fills the gap between the first reflective sheet, the second reflective sheet, the first substrate and the second substrate, and the first substrate, the second substrate and the filler can maintain stable light travel. To avoid affecting the optical path due to the difference in refractive index of air.
綜上所述，本發明具有下列之一或多個優點： In summary, the present invention has one or more of the following advantages:
1.光源不須斜置，不會增加元件厚度。 1. The light source does not have to be tilted and does not increase the thickness of the component.
2.微結構體的結構設計，讓光線均勻分布，增加指紋解析度。 2. The structural design of the microstructure allows the light to be evenly distributed and increases the resolution of the fingerprint.
3.利用反射片及微結構的位置配置，改善光路，進而改善扭曲及鬼影問題。 3. Using the positional configuration of the reflective sheet and the microstructure to improve the optical path, thereby improving the distortion and ghosting problems.
1‧‧‧光源 1‧‧‧Light source
10‧‧‧出射光 10‧‧‧Out of light
2‧‧‧第一反射片 2‧‧‧First reflection sheet
20‧‧‧第一反射光 20‧‧‧First reflected light
22‧‧‧第二微結構體 22‧‧‧Second microstructure
220‧‧‧第二微結構單元 220‧‧‧Second microstructure unit
3‧‧‧電路板 3‧‧‧Circuit board
4‧‧‧第二反射片 4‧‧‧Second reflector
40‧‧‧第一微結構體 40‧‧‧First microstructure
400‧‧‧第一微結構單元 400‧‧‧First microstructural unit
42‧‧‧第二反射光 42‧‧‧second reflected light
5‧‧‧指紋辨識區 5‧‧‧Fingerprint identification area
50‧‧‧第三反射光 50‧‧‧ Third reflected light
6‧‧‧手指 6‧‧‧ fingers
7‧‧‧影像擷取單元 7‧‧‧Image capture unit
8‧‧‧第一基板 8‧‧‧First substrate
9‧‧‧第二基板 9‧‧‧second substrate
12‧‧‧填充物 12‧‧‧Filling
11‧‧‧第一穿透結構 11‧‧‧First penetrating structure
110‧‧‧第三微結構體 110‧‧‧ Third microstructure
1100‧‧‧第三微結構單元 1100‧‧‧ third microstructure unit
13‧‧‧第二穿透結構 13‧‧‧Second penetrating structure
130‧‧‧第四微結構體 130‧‧‧fourth microstructure
1300‧‧‧第四微結構單元 1300‧‧‧fourth microstructure unit
圖1係本發明之反射片模組之第一實施例 1 is a first embodiment of a reflective sheet module of the present invention
圖2係本發明之反射片模組之第二實施例 2 is a second embodiment of a reflective sheet module of the present invention
圖3係本發明之反射片模組之第三實施例 3 is a third embodiment of a reflective sheet module of the present invention
圖4係本發明之反射片模組之第四實施例 4 is a fourth embodiment of a reflective sheet module of the present invention
圖5係本發明之反射片模組之第五實施例 Figure 5 is a fifth embodiment of the reflective sheet module of the present invention
圖6係本發明之反射片模組之第六實施例 Figure 6 is a sixth embodiment of the reflective sheet module of the present invention
圖7係本發明之反射片模組之第七實施例 Figure 7 is a seventh embodiment of the reflective sheet module of the present invention
圖8係本發明之反射片模組之第八實施例 Figure 8 is an eighth embodiment of the reflective sheet module of the present invention
圖9係本發明之反射片模組之第九實施例 Figure 9 is a ninth embodiment of the reflective sheet module of the present invention
圖10係先前技術之反射片模組的方格影像測試圖 Figure 10 is a square image test chart of the prior art reflective sheet module.
圖11係本發明之反射片模組的方格影像測試圖 Figure 11 is a square image test chart of the reflection sheet module of the present invention.
為充分了解本發明之目的、特徵及功效，茲藉由下述具體之實施例，並配合所附之圖式，對本發明做一詳細說明，說明如後：請參閱圖1所示，本發明之反射片模組，其第一實施例包含設於向上發光之光源1的發光範圍內的第一反射片2及設在電路板3上的第二反射片4。其中第二反射片4具有第一微結構體40，此第一微結構體40設於面對第一反射片2的一面上。當光源1發射出射光10時，部分出射光10將照射在第一反射片2上，並反射第一反射光20朝向設於第一反射光20光路上的第二反射片4行進，而第一反射光20藉由第一微結構體40，將第一反射光20反射形成均勻分佈之第二反射光42，並朝向指紋辨識區5(於圖式中虛線區域，係為第一基板8上的部分區域)照射，使得於指紋辨識區5之手指6能均勻地被照射，因此手指6指紋的脊紋與溝紋能夠均勻地反射形成第三反射光50反射至影像擷取單元7。其中，上述反射片模組更包含第一基板8及第二基板9，其中第一基板8設於指紋辨識區5與第一反射片2間而第二基板9設於第一反射片2與第二反射片4間。於此反射片模組中，具有填充物12將第一反射片2、第二反射片4、第一基板8及第二基板9間的空隙填滿，其中，第一基板8與第二基板9的折射率相同，且填充物12之折射率為第一基板8或第二基板9之折射率的±5%，進而可維持光線穩定行進，避免因不同介質(如：玻 璃與空氣)的折射率不同而影響光路。 In order to fully understand the object, features and advantages of the present invention, the present invention will be described in detail by the following specific embodiments and the accompanying drawings, which are illustrated as follows: The first embodiment of the reflective sheet module includes a first reflective sheet 2 disposed within a light-emitting range of the upwardly-illuminated light source 1 and a second reflective sheet 4 disposed on the circuit board 3. The second reflective sheet 4 has a first microstructure 40 disposed on a side facing the first reflective sheet 2. When the light source 1 emits the emitted light 10, part of the emitted light 10 will be irradiated on the first reflective sheet 2, and the reflected first reflected light 20 will travel toward the second reflective sheet 4 disposed on the optical path of the first reflected light 20, and A reflected light 20 reflects the first reflected light 20 by the first microstructure 40 to form a uniformly distributed second reflected light 42 and faces the fingerprint recognition area 5 (in the dotted line region of the drawing, the first substrate 8 is The upper portion is irradiated so that the finger 6 of the fingerprint recognition area 5 can be uniformly illuminated, so that the ridges and grooves of the fingerprint of the finger 6 can be uniformly reflected to form the third reflected light 50 to be reflected to the image capturing unit 7. The reflective sheet module further includes a first substrate 8 and a second substrate 9 , wherein the first substrate 8 is disposed between the fingerprint recognition area 5 and the first reflective sheet 2 and the second substrate 9 is disposed on the first reflective sheet 2 Between the second reflection sheets 4. In the reflective sheet module, a filler 12 is filled with a gap between the first reflective sheet 2, the second reflective sheet 4, the first substrate 8 and the second substrate 9, wherein the first substrate 8 and the second substrate are filled. The refractive index of 9 is the same, and the refractive index of the filler 12 is ±5% of the refractive index of the first substrate 8 or the second substrate 9, thereby maintaining stable light travel and avoiding different media (such as glass and air). The refractive index is different and affects the optical path.
請參閱圖2，本發明之第二實施例中，大致與第一實施例相似，兩者不同在於，第一反射片2面對光源1的一面設有第二微結構體22，係將該第一反射光20均勻地分佈到第二反射片4上，使第二反射光42具有更均勻的光強度分佈，提高指紋辨識的解析度及精確度。其中，請參閱圖3，本發明之第三實施例，其中，第一微結構體40與第二微結構體22上具有複數第一微結構單元400及第二微結構單元220，且第一微結構單元400及第二微結構單元220為線性或圓弧形排列，另，第一微結構體40與第二微結構體22之排列方向可為相互正交，上述不同的排列方式可讓出射光10作雙維度的調整，經調整後的出射光10可達到更均勻地分佈，進而增加指紋辨識的清晰度，並且改善影像扭曲及鬼影的問題。 Referring to FIG. 2, in a second embodiment of the present invention, it is substantially similar to the first embodiment, except that the first reflective sheet 2 is provided with a second microstructure 22 on a side facing the light source 1. The first reflected light 20 is evenly distributed onto the second reflective sheet 4, so that the second reflected light 42 has a more uniform light intensity distribution, which improves the resolution and accuracy of fingerprint recognition. Referring to FIG. 3, a third embodiment of the present invention, wherein the first microstructure 40 and the second microstructure 22 have a plurality of first microstructure units 400 and a second microstructure unit 220, and first The microstructure unit 400 and the second microstructure unit 220 are arranged in a linear or circular arc shape. In addition, the arrangement direction of the first microstructure 40 and the second microstructure 22 may be orthogonal to each other, and the different arrangement may allow The emitted light 10 is adjusted in two dimensions, and the adjusted outgoing light 10 can be more evenly distributed, thereby increasing the sharpness of fingerprint recognition and improving image distortion and ghosting.
請參閱圖4及圖5，本發明之第四與第五實施例中，大致與第一及第二實施例相似，為了使出射光10能更加均勻地分佈到第一反射片2上，在光源1與第一反射片2間的出射光10之光路經過的位置上更包含第一穿透結構11，此第一穿透結構11於面向第一反射片2的一側上設有第三微結構體110，當光源1發射出射光10，此出射光10將穿過面向光源1之第一穿透結構11，並在行經第三微結構體110時，藉由第三微結構體110的結構設計，更加提高出射光10的均勻度。 Referring to FIG. 4 and FIG. 5, in the fourth and fifth embodiments of the present invention, substantially similar to the first and second embodiments, in order to more uniformly distribute the outgoing light 10 onto the first reflective sheet 2, The first penetrating structure 11 further includes a first penetrating structure 11 at a position where the light path of the outgoing light 10 between the light source 1 and the first reflecting sheet 2 passes, and the first penetrating structure 11 is provided with a third surface on a side facing the first reflecting sheet 2. The microstructure 110, when the light source 1 emits the outgoing light 10, the outgoing light 10 will pass through the first penetrating structure 11 facing the light source 1, and when passing through the third microstructure 110, by the third microstructure 110 The structural design further improves the uniformity of the outgoing light 10.
請參閱圖6及圖7，本發明之第六與第七實施例中，大致與第一及第二實施例相似，為了使第一反射光20能更加均勻地分佈到第二反射片4上，在第一反射片2與第二反射片4間的第一反射光20之光路經過的位置上更包含第二穿透結構13，此第二穿透結構13於面向第二反射片4的一側上 設有第四微結構體130，當第一反射片2反射第一反射光20，此第一反射光20穿過面向第一反射片2之第二穿透結構13，並在行經第四微結構體130時，藉由第四微結構體130的結構設計，更加提高第一反射光20的均勻度。 Referring to FIG. 6 and FIG. 7, in the sixth and seventh embodiments of the present invention, substantially similar to the first and second embodiments, in order to more uniformly distribute the first reflected light 20 onto the second reflective sheet 4. Further, the second penetrating structure 13 is further disposed at a position where the optical path of the first reflected light 20 between the first reflective sheet 2 and the second reflective sheet 4 passes, and the second penetrating structure 13 faces the second reflecting sheet 4 A fourth microstructure 130 is disposed on one side, and when the first reflection sheet 2 reflects the first reflected light 20, the first reflected light 20 passes through the second penetration structure 13 facing the first reflection sheet 2, and is passed through In the case of the fourth microstructures 130, the uniformity of the first reflected light 20 is further improved by the structural design of the fourth microstructures 130.
請參閱圖8及圖9，本發明之第八與第九實施例中，其同時包含具有第三微結構體110的第一穿透結構11及具有第四微結構體130的第二穿透結構13，此設置不但能讓出射光10藉由第一穿透結構11上的第三微結構體110，更加提高出射光10的均勻度，使出射光10均勻地照射在第一反射片2上，更藉由行經第二穿透結構13上的第四微結構體130，進而得到均勻度更高的第一反射光20。 Referring to FIG. 8 and FIG. 9, in the eighth and ninth embodiments of the present invention, the first penetration structure 11 having the third microstructures 110 and the second penetration having the fourth microstructures 130 are simultaneously included. The structure 13 not only enables the outgoing light 10 to further improve the uniformity of the outgoing light 10 by the third microstructure 110 on the first penetrating structure 11, so that the outgoing light 10 is uniformly irradiated on the first reflecting sheet 2 Further, by passing through the fourth microstructures 130 on the second penetrating structure 13, the first reflected light 20 having higher uniformity is obtained.
其中，上述之實施例中，第一微結構體40、第二微結構體22、第三微結構體110及第四微結構體130各別具有複數個第一微結構單元400、第二微結構單元220、第三微結構單元1100及第四微結構單元1300，其微結構單元間之間距範圍及微結構單元之高度範圍為0.01mm至0.1mm，且與反射片模組的傾斜角度為0°至±45°，其中各微結構體上之微結構單元不一定為相同大小及角度，其可依各元件設置位置作調整，亦可為漸變結構，以符合各種不同模組所需之反射片模組，提高指紋辨識之解析度及精確度。 In the above embodiment, the first microstructure 40, the second microstructure 22, the third microstructure 110, and the fourth microstructure 130 each have a plurality of first microstructure units 400 and a second micro The structural unit 220, the third microstructure unit 1100 and the fourth microstructure unit 1300 have a range of distance between the microstructure units and a height range of the microstructure unit of 0.01 mm to 0.1 mm, and the inclination angle with the reflection sheet module is 0° to ±45°, wherein the microstructure units on each microstructure are not necessarily the same size and angle, which can be adjusted according to the position of each component, or can be a gradual structure to meet the requirements of various modules. Reflective film module to improve the resolution and accuracy of fingerprint recognition.
請參閱圖10與圖11，其分別為先前技術與本發明之反射片模組執行方格影像測試的結果，其中每一方格為長寬為0.5mm的正方格，而圖中之取像面積約為長6.7mm及寬1.9mm的長方形取像，由圖10可以明顯看出，先前技術中之中間區域(圓圈標示處)影像為模糊亮帶，即此具有為鬼影的問題，而相較於先前技術，本發明之方格影像為中間區域(圓圈標示處)影像仍具有清晰的格線，因此，本發明之反射片模組確實能得到解析度及 清晰度較高的影像，改善先前技術所造成的鬼影問題。 Please refer to FIG. 10 and FIG. 11 , which respectively show the results of the checkered image test performed by the prior art and the reflective sheet module of the present invention, wherein each square is a square with a length and a width of 0.5 mm, and the image in the image is taken. The rectangular image with an area of about 6.7 mm in length and 1.9 mm in width can be clearly seen from Fig. 10. In the prior art, the image in the middle area (circled at the circle) is a blurred bright band, that is, it has a problem of ghosting, and Compared with the prior art, the square image of the present invention has a clear grid line in the middle area (the circle mark), and therefore, the reflection sheet module of the present invention can obtain an image with high resolution and high definition. Improve ghosting problems caused by prior art.
本發明在上文中以藉由較佳之實施例具體充分接露相關技術內容，然熟習本項技術者應理解的是，該實施例僅用於描繪本發明，當不能以此限定本發明之專利範圍；熟悉此想技術領域之人士當可在瞭解本發明之精神與原則後對其進行變更與修改而達到等效目的，而此等變更與修改，皆應涵蓋於如後所述申請專利範圍所界定之範疇中。 The present invention has been specifically described above by way of a preferred embodiment, and it should be understood by those skilled in the art that this embodiment is only used to describe the present invention. Scope; those who are familiar with the technical field can change and modify the spirit and principle of the invention to achieve the equivalent purpose, and such changes and modifications should be included in the scope of patent application as described later. Among the defined categories.
Claims (11)
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| TW106132546A TW201915386A (en) | 2017-09-22 | 2017-09-22 | Reflector plate module capable of uniformly distributing reflected light to illuminate the fingerprint identification area |
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| TW106132546A TW201915386A (en) | 2017-09-22 | 2017-09-22 | Reflector plate module capable of uniformly distributing reflected light to illuminate the fingerprint identification area |
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| TW201915386A true TW201915386A (en) | 2019-04-16 |
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