TWI785858B - Biometric verification device - Google Patents

Biometric verification device Download PDF

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TWI785858B
TWI785858B TW110139384A TW110139384A TWI785858B TW I785858 B TWI785858 B TW I785858B TW 110139384 A TW110139384 A TW 110139384A TW 110139384 A TW110139384 A TW 110139384A TW I785858 B TWI785858 B TW I785858B
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backlight module
layer
identification device
biometric identification
light
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TW110139384A
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TW202247437A (en
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朱訓箴
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友達光電股份有限公司
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Priority to CN202210198609.9A priority Critical patent/CN114565949A/en
Priority to US17/689,991 priority patent/US11694466B2/en
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Abstract

A biometric verification device including a backlight module, a light detector, a switching element and at least one collimation structure is provided. The light detector is disposed on the backlight module. The switching element is disposed on the backlight module and electrically connected to the light detector. The at least one collimation structure is disposed on the backlight module and has a first transparent hole and a second transparent hole. A horizontal projection of the first transparent hole and the second transparent hole on the backlight module does not overlap a horizontal projection of the light detector on the backlight module.

Description

生物特徵辨識裝置biometric identification device

本發明是有關於一種光學裝置，且特別是有關於一種生物特徵辨識裝置。The present invention relates to an optical device, and in particular to a biometric identification device.

近年來，生物特徵辨識技術被廣泛地應用在各式電子裝置上，例如行動電話以及平板電腦等，以提供各種身分登錄或身分驗證功能。以背光式的指紋辨識裝置而言，為了使指紋的影像清晰，需侷限光線的出光角度範圍，使得光線自手指反射到偵測器的角度範圍較小，以避免偵測器接收過多大角度的雜散光而使影像變得模糊。目前的做法是在背光模組上方貼附一張準直膜，而準直膜除了增加額外成本外，也佔有一定空間。In recent years, biometric identification technology has been widely used in various electronic devices, such as mobile phones and tablet computers, to provide various identity login or identity verification functions. For a backlit fingerprint recognition device, in order to make the image of the fingerprint clear, it is necessary to limit the light emitting angle range, so that the angle range of the light reflected from the finger to the detector is small, so as to avoid the detector receiving too much light from a large angle. Stray light blurs the image. The current practice is to attach a collimation film on the top of the backlight module, and the collimation film not only increases additional costs, but also occupies a certain space.

本發明提供一種生物特徵辨識裝置，不需貼附準直膜，降低成本，也減少裝置厚度。The invention provides a biometric identification device, which does not need to attach an alignment film, reduces the cost, and reduces the thickness of the device.

根據本發明一實施例，提供一種生物特徵辨識裝置，包括背光模組、光偵測器、開關元件以及至少一準直結構。光偵測器設置於背光模組上。開關元件設置於背光模組上，且電性連接光偵測器。至少一準直結構設置於背光模組上且具備第一透光孔以及第二透光孔。第一透光孔以及第二透光孔在背光模組上的水平投影不重疊光偵測器在背光模組上的水平投影。According to an embodiment of the present invention, a biometric identification device is provided, including a backlight module, a light detector, a switch element, and at least one collimation structure. The light detector is arranged on the backlight module. The switch element is arranged on the backlight module and is electrically connected to the light detector. At least one collimation structure is disposed on the backlight module and has a first light transmission hole and a second light transmission hole. The horizontal projections of the first light-transmitting hole and the second light-transmitting hole on the backlight module do not overlap the horizontal projection of the light detector on the backlight module.

基於上述，本發明實施例提供的生物特徵辨識裝置以準直結構取代準直膜。準直結構的第一透光孔以及第二透光孔在背光模組上的水平投影不重疊光偵測器的水平投影，相較於習知技藝，減少了製程道數，並降低了辨識裝置的厚度。Based on the above, the biometric identification device provided by the embodiment of the present invention uses a collimating structure instead of a collimating film. The horizontal projection of the first light transmission hole and the second light transmission hole of the collimation structure on the backlight module does not overlap the horizontal projection of the photodetector. Compared with the conventional technology, the number of process channels is reduced and the identification is reduced. The thickness of the device.

為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

參照圖1A及圖1B，圖1A繪示根據本發明第一實施例的生物特徵辨識裝置的一像素的平面示意圖。圖1B是沿著圖1A中的線段AA’的橫截面示意圖。Referring to FIG. 1A and FIG. 1B , FIG. 1A is a schematic plan view of a pixel of a biometric identification device according to a first embodiment of the present invention. Fig. 1B is a schematic cross-sectional view along line AA' in Fig. 1A.

生物特徵辨識裝置1包括背光模組10、光偵測器201、開關元件202以及準直結構ES1，其中準直結構ES1設置於穿透區100，光偵測器201以及開關元件202設置於感測區200，穿透區100與感測區200不相重疊。光偵測器201、開關元件202以及準直結構ES1皆設置於背光模組10上。開關元件202電性連接光偵測器201。準直結構ES1的數量為至少一個，且每一準直結構ES1具備第一透光孔101H以及第二透光孔102H。如圖1A所示，生物特徵辨識裝置1的每一像素具備四個準直結構ES1。The biometric identification device 1 includes a backlight module 10, a light detector 201, a switch element 202, and an alignment structure ES1, wherein the alignment structure ES1 is arranged in the penetrating area 100, and the light detector 201 and the switch element 202 are arranged in the sensor The detection area 200 does not overlap the penetration area 100 and the sensing area 200 . The light detector 201 , the switch element 202 and the collimation structure ES1 are all disposed on the backlight module 10 . The switch element 202 is electrically connected to the light detector 201 . There is at least one collimation structure ES1, and each collimation structure ES1 has a first light transmission hole 101H and a second light transmission hole 102H. As shown in FIG. 1A , each pixel of the biometric identification device 1 has four collimating structures ES1 .

開關元件202係藉由圖案化半導體層202P、第一金屬層202G以及第二金屬層202S來定義，其中半導體層202P、第一金屬層202G以及第二金屬層202S的相鄰兩層之間還設置有絕緣層ILD1及ILD2。由於第二金屬層202S以及半導體層202P之間設置有絕緣層ILD1及ILD2，為了實現需要的電連接關係，第二金屬層202S透過貫穿絕緣層ILD1及ILD2的通孔以連接至半導體層202P。除此之外，開關元件202包括遮蔽金屬層202M，遮蔽金屬層202M被設置以避免半導體層202P因受背光模組10的照射而影響半導體層202P的特性。The switch element 202 is defined by patterning the semiconductor layer 202P, the first metal layer 202G, and the second metal layer 202S, wherein there is a gap between two adjacent layers of the semiconductor layer 202P, the first metal layer 202G, and the second metal layer 202S. Insulating layers ILD1 and ILD2 are provided. Since the insulating layers ILD1 and ILD2 are disposed between the second metal layer 202S and the semiconductor layer 202P, in order to realize the required electrical connection, the second metal layer 202S is connected to the semiconductor layer 202P through the via holes penetrating the insulating layers ILD1 and ILD2. In addition, the switch element 202 includes a shielding metal layer 202M, which is configured to prevent the semiconductor layer 202P from being affected by the illumination of the backlight module 10 on the characteristics of the semiconductor layer 202P.

如圖1B所示，背光模組10朝不同方向射出多個光束，其中，依序穿過第一透光孔101H以及第二透光孔102H且被使用者的手指FG反射的光束得以入射光偵測器201，使得生物特徵辨識裝置1得以辨識使用者的指紋FP。同樣自背光模組10射出的大角度光束則受到準直結構ES1的阻擋而無法到達使用者的手指FG。As shown in FIG. 1B , the backlight module 10 emits a plurality of light beams in different directions, wherein the light beams that pass through the first light transmission hole 101H and the second light transmission hole 102H in sequence and are reflected by the user's finger FG are incident light. The detector 201 enables the biometric identification device 1 to identify the user's fingerprint FP. Similarly, the large-angle light beam emitted from the backlight module 10 is blocked by the collimation structure ES1 and cannot reach the user's finger FG.

在本實施例中，第一透光孔101H以及第二透光孔102H分別由第一準直層101以及第二準直層102限定，且第一準直層101以及第二準直層102包括金屬。遮蔽金屬層202M與第一準直層101以及第一透光孔101H同層設置。第二準直層102電性連接生物特徵辨識裝置1的共同電極，以穩定電壓，避免耦合。In this embodiment, the first light transmission hole 101H and the second light transmission hole 102H are respectively defined by the first alignment layer 101 and the second alignment layer 102, and the first alignment layer 101 and the second alignment layer 102 including metal. The shielding metal layer 202M is disposed on the same layer as the first alignment layer 101 and the first light transmission hole 101H. The second alignment layer 102 is electrically connected to the common electrode of the biometric identification device 1 to stabilize the voltage and avoid coupling.

本實施例提供的生物特徵辨識裝置1設置了準直結構ES1。並且，不同於習知技藝中準直膜（層）被設置為與光偵測器重疊，準直結構ES1不與光偵測器201重疊。具體而言，準直結構ES1的第一透光孔101H以及第二透光孔102H在背光模組10上的水平投影不重疊光偵測器201在背光模組10上的水平投影，且遮蔽金屬層202M與第一準直層101以及第一透光孔101H同層設置。因此得以減少製程道數，且生物特徵辨識裝置1的厚度得以降低。The biometric identification device 1 provided in this embodiment is provided with an alignment structure ES1. Moreover, unlike the collimation film (layer) in the prior art that is arranged to overlap the photodetector, the collimation structure ES1 does not overlap the photodetector 201 . Specifically, the horizontal projections of the first light transmission hole 101H and the second light transmission hole 102H of the collimation structure ES1 on the backlight module 10 do not overlap the horizontal projection of the light detector 201 on the backlight module 10, and block The metal layer 202M is disposed on the same layer as the first alignment layer 101 and the first light transmission hole 101H. Therefore, the number of manufacturing processes can be reduced, and the thickness of the biometric identification device 1 can be reduced.

在本實施例中，第一透光孔101H與第二透光孔102H為圓形，且兩透光孔在第一準直層101的法線方向上的距離H1與第一透光孔101H的寬度W1以及第二透光孔102H的寬度W1的比值落在5至10的範圍內，以確保第一準直層101以及第二準直層102遮擋了大角度的斜向雜散光。在本實施例中，第一透光孔101H的寬度W1以及第二透光孔102H的寬度W1即為其直徑。In this embodiment, the first light transmission hole 101H and the second light transmission hole 102H are circular, and the distance H1 between the two light transmission holes in the normal direction of the first alignment layer 101 is the same as that of the first light transmission hole 101H. The ratio of the width W1 of the second light transmission hole 102H to the width W1 of the second light transmission hole 102H falls within the range of 5 to 10, so as to ensure that the first collimating layer 101 and the second collimating layer 102 block large-angle oblique stray light. In this embodiment, the width W1 of the first light transmission hole 101H and the width W1 of the second light transmission hole 102H are their diameters.

生物特徵辨識裝置1還包括透明基板20、第一平坦化層PL1、第二平坦化層PL2及透明蓋板30。透明基板20設置於背光模組10以及第一準直層101之間。第一平坦化層PL1設置於第二金屬層202S以及光偵測器201上，且第二準直層102設置於第一平坦化層PL1上。第二平坦化層PL2設置於第二準直層102上。透明蓋板30設置於第二平坦化層PL2上，以提供使用者放置其手指FG，執行指紋辨識。The biometric identification device 1 further includes a transparent substrate 20 , a first planarization layer PL1 , a second planarization layer PL2 and a transparent cover 30 . The transparent substrate 20 is disposed between the backlight module 10 and the first alignment layer 101 . The first planarization layer PL1 is disposed on the second metal layer 202S and the photodetector 201 , and the second alignment layer 102 is disposed on the first planarization layer PL1 . The second planarization layer PL2 is disposed on the second alignment layer 102 . The transparent cover 30 is disposed on the second planarization layer PL2 to allow the user to place his finger FG to perform fingerprint identification.

生物特徵辨識裝置1還包括透明電極層201E，電性連接光偵測器201。透明電極層201E設置於第一準直層101以及第二準直層102之間，且藉由第二準直層102電性連接至共同電極。但本發明不以此為限，在本發明的另一實施例中，透明電極層201E與第二準直層102之間設置有絕緣層，透明電極層201E與第二準直層102兩者在感測區200內不電性連接，且在感測區200外各自連接至共同電極。第二準直層102在背光模組10上的水平投影部分重疊透明電極層201E在背光模組10上的水平投影。第二準直層102在背光模組10上的水平投影部分重疊光偵測器201在背光模組10上的水平投影，以遮擋大角度的斜向雜散光，避免雜散光入射光偵測器201。The biometric identification device 1 further includes a transparent electrode layer 201E electrically connected to the light detector 201 . The transparent electrode layer 201E is disposed between the first alignment layer 101 and the second alignment layer 102 , and is electrically connected to the common electrode through the second alignment layer 102 . But the present invention is not limited thereto. In another embodiment of the present invention, an insulating layer is arranged between the transparent electrode layer 201E and the second alignment layer 102, and both the transparent electrode layer 201E and the second alignment layer 102 They are not electrically connected within the sensing region 200 , and are respectively connected to a common electrode outside the sensing region 200 . The horizontal projection of the second alignment layer 102 on the backlight module 10 partially overlaps the horizontal projection of the transparent electrode layer 201E on the backlight module 10 . The horizontal projection of the second collimation layer 102 on the backlight module 10 partially overlaps the horizontal projection of the photodetector 201 on the backlight module 10 to block oblique stray light with a large angle and prevent stray light from entering the photodetector 201.

在圖1B中，開關元件202具有雙閘極電極GE，但是本發明不以此為限。在其他實施例中，開關元件202只有一個閘極電極GE。除此之外，設置於光偵測器201下方的半導體層202P與第一金屬層202G之間具有儲存電容，第一金屬層202G與第二金屬層202S之間具有儲存電容，且第一準直層101於光偵測器201下方具備開口，此開口在背光模組10上的水平投影至少部分重疊光偵測器201在背光模組10上的水平投影，以避免雜訊。In FIG. 1B , the switch element 202 has double gate electrodes GE, but the invention is not limited thereto. In other embodiments, the switch element 202 has only one gate electrode GE. In addition, there is a storage capacitance between the semiconductor layer 202P disposed under the photodetector 201 and the first metal layer 202G, and there is a storage capacitance between the first metal layer 202G and the second metal layer 202S, and the first quasi The straight layer 101 has an opening below the light detector 201 , and the horizontal projection of the opening on the backlight module 10 at least partially overlaps the horizontal projection of the light detector 201 on the backlight module 10 to avoid noise.

為了充分說明本發明的各種實施態樣，將在下文描述本發明的其他實施例。在此必須說明的是，下述實施例沿用前述實施例的元件標號與部分內容，其中採用相同的標號來表示相同或近似的元件，並且省略了相同技術內容的說明。關於省略部分的說明可參考前述實施例，下述實施例不再重複贅述。In order to fully illustrate various implementation aspects of the present invention, other embodiments of the present invention will be described below. It must be noted here that the following embodiments use the component numbers and part of the content of the previous embodiments, wherein the same numbers are used to denote the same or similar components, and descriptions of the same technical content are omitted. For the description of omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

參照圖2A及圖2B，圖2A繪示根據本發明第二實施例的生物特徵辨識裝置的一像素的平面示意圖。圖2B是沿著圖2A中的線段AA’的橫截面示意圖。Referring to FIG. 2A and FIG. 2B , FIG. 2A is a schematic plan view of a pixel of a biometric identification device according to a second embodiment of the present invention. Fig. 2B is a schematic cross-sectional view along line AA' in Fig. 2A.

生物特徵辨識裝置2包括背光模組10、光偵測器201、開關元件202以及準直結構ES2。在本實施例中，第一準直層101以及第一透光孔201H與第二金屬層202S同層設置，第二準直層102以及第二透光孔202H與開關元件202的遮蔽金屬層202M同層設置。第一準直層101與第二準直層102電性連接，並電性連接至生物特徵辨識裝置2的共同電極，以穩定電壓，避免耦合。The biometric identification device 2 includes a backlight module 10 , a light detector 201 , a switching element 202 and an alignment structure ES2 . In this embodiment, the first alignment layer 101 and the first light transmission hole 201H are set in the same layer as the second metal layer 202S, and the second alignment layer 102 and the second light transmission hole 202H and the shielding metal layer of the switching element 202 202M is set on the same floor. The first alignment layer 101 is electrically connected to the second alignment layer 102 and is electrically connected to the common electrode of the biometric identification device 2 to stabilize the voltage and avoid coupling.

在本實施例中，半導體層202P設置於光偵測器201以及遮蔽金屬層202M之間。背光模組10射出的光束依序穿過第一透光孔201H以及第二透光孔202H，被使用者的手指FG反射而入射光偵測器201。遮蔽金屬層202M被設置以避免自使用者的手指FG反射的光入射半導體層202P。In this embodiment, the semiconductor layer 202P is disposed between the photodetector 201 and the shielding metal layer 202M. The light beam emitted from the backlight module 10 sequentially passes through the first light transmission hole 201H and the second light transmission hole 202H, is reflected by the user's finger FG, and enters the light detector 201 . The shielding metal layer 202M is provided to prevent light reflected from the user's finger FG from entering the semiconductor layer 202P.

第一金屬層202G（雙閘極電極GE）以及第二金屬層202S設置於背光模組10以及半導體層202P之間。第一金屬層202G在背光模組10上的水平投影部分重疊半導體層202P在背光模組10上的水平投影，第二金屬層202S在背光模組10上的水平投影部分重疊半導體層202P在背光模組10上的水平投影，以避免半導體層202P因受背光模組10的照射而影響半導體層202P的特性。The first metal layer 202G (double gate electrode GE) and the second metal layer 202S are disposed between the backlight module 10 and the semiconductor layer 202P. The horizontal projection of the first metal layer 202G on the backlight module 10 partially overlaps the horizontal projection of the semiconductor layer 202P on the backlight module 10, and the horizontal projection of the second metal layer 202S on the backlight module 10 partially overlaps the semiconductor layer 202P on the backlight. The horizontal projection on the module 10 is used to prevent the semiconductor layer 202P from affecting the characteristics of the semiconductor layer 202P due to the illumination of the backlight module 10 .

在本發明一未繪示的實施例中，半導體層202P在背光模組10上的水平投影可以完全落在第一金屬層202G以及第二金屬層202S兩者在背光模組10上的水平投影內，以利用第一金屬層202G以及第二金屬層202S兩者更完整地遮擋來自於背光模組10的光束，避免光束入射半導體層202P。In an unillustrated embodiment of the present invention, the horizontal projection of the semiconductor layer 202P on the backlight module 10 can completely fall on the horizontal projections of both the first metal layer 202G and the second metal layer 202S on the backlight module 10 In order to use both the first metal layer 202G and the second metal layer 202S to more completely block the light beam from the backlight module 10 and prevent the light beam from entering the semiconductor layer 202P.

參照圖3A至圖3B，圖3A是根據本發明第三實施例的生物特徵辨識裝置的一像素的平面示意圖。圖3B是沿著圖3A中的線段AA’的橫截面示意圖。Referring to FIG. 3A to FIG. 3B , FIG. 3A is a schematic plan view of a pixel of a biometric identification device according to a third embodiment of the present invention. Fig. 3B is a schematic cross-sectional view along line AA' in Fig. 3A.

生物特徵辨識裝置3包括背光模組10、光偵測器201、開關元件202以及準直結構ES3。相較於圖1A及1B所示的生物特徵辨識裝置1，本實施例的準直結構ES3包括第一透光孔301H及第二透光孔302H，且兩透光孔在背光模組10上的水平投影部分重疊。但本發明不以此為限，在本發明的其他實施例中，第一透光孔301H及第二透光孔302H兩者在背光模組10上的水平投影互不重疊。The biometric identification device 3 includes a backlight module 10 , a light detector 201 , a switching element 202 and an alignment structure ES3 . Compared with the biometric identification device 1 shown in FIGS. 1A and 1B , the collimation structure ES3 of this embodiment includes a first light transmission hole 301H and a second light transmission hole 302H, and the two light transmission holes are on the backlight module 10 The horizontal projections of are partially overlapping. However, the present invention is not limited thereto. In other embodiments of the present invention, the horizontal projections of the first light transmission hole 301H and the second light transmission hole 302H on the backlight module 10 do not overlap each other.

第一透光孔301H與第二透光孔302H為圓形，第一透光孔301H的中心與該第二透光孔302H的中心的連線構成第一虛擬線L1，第一虛擬線L1與第一準直層101的法線之間夾設有第一夾角θ1，第一夾角θ1的大小落在2度至63度的範圍內，以控制僅讓朝向光偵測器201的斜向光通過，增加自手指反射進入光偵測器201的光量。The first light transmission hole 301H and the second light transmission hole 302H are circular, and the line connecting the center of the first light transmission hole 301H and the center of the second light transmission hole 302H constitutes a first imaginary line L1, and the first imaginary line L1 A first angle θ1 is sandwiched between the normal line of the first alignment layer 101, and the size of the first angle θ1 falls within the range of 2 degrees to 63 degrees, so as to control only the oblique direction towards the photodetector 201 The light passes through, increasing the amount of light reflected from the finger into the light detector 201 .

第一虛擬線L1與透明蓋板30遠離背光模組10的表面相交於虛擬點P1，虛擬點P1與光偵測器201的幾何中心P2的連線構成第二虛擬線L2，第二虛擬線L2與第一準直層101的法線之間夾設有第二夾角θ2，第二夾角θ2的大小落在2度至63度的範圍內。The first imaginary line L1 intersects the surface of the transparent cover plate 30 away from the backlight module 10 at an imaginary point P1, and the line connecting the imaginary point P1 and the geometric center P2 of the photodetector 201 constitutes a second imaginary line L2, and the second imaginary line A second angle θ2 is interposed between L2 and the normal line of the first alignment layer 101 , and the magnitude of the second angle θ2 falls within a range of 2 degrees to 63 degrees.

參照圖4A至圖4B，圖4A是根據本發明第四實施例的生物特徵辨識裝置的一像素的平面示意圖。圖4B是沿著圖4A中的線段AA’的橫截面示意圖。Referring to FIG. 4A to FIG. 4B , FIG. 4A is a schematic plan view of a pixel of a biometric identification device according to a fourth embodiment of the present invention. Fig. 4B is a schematic cross-sectional view along line AA' in Fig. 4A.

生物特徵辨識裝置4包括背光模組10、光偵測器201、開關元件202以及準直結構ES4。相較於圖1A及1B所示的生物特徵辨識裝置1，本實施例的準直結構ES4包括第一透光孔401H及第二透光孔402H，且兩透光孔在背光模組10上的水平投影互不重疊。第一透光孔401H以及第二透光孔402H皆為條形，且此條形與光偵測器201靠近準直結構ES4的一側的輪廓共形。如此一來，光偵測器201在不同方向上與第一透光孔401H以及第二透光孔402H的距離相同，得以控制光偵測器201在不同方向上的收光效果的均勻性。The biometric identification device 4 includes a backlight module 10 , a light detector 201 , a switching element 202 and an alignment structure ES4 . Compared with the biometric identification device 1 shown in FIGS. 1A and 1B , the collimation structure ES4 of this embodiment includes a first light-transmitting hole 401H and a second light-transmitting hole 402H, and the two light-transmitting holes are on the backlight module 10 The horizontal projections of do not overlap each other. Both the first light transmission hole 401H and the second light transmission hole 402H are strip-shaped, and the strip shape conforms to the contour of the side of the light detector 201 close to the collimation structure ES4. In this way, the light detector 201 is at the same distance from the first light transmission hole 401H and the second light transmission hole 402H in different directions, so that the uniformity of the light collection effect of the light detector 201 in different directions can be controlled.

綜上所述，本發明實施例提供的生物特徵辨識裝置以準直結構取代準直膜。準直結構的第一透光孔以及第二透光孔在背光模組上的水平投影不重疊光偵測器的水平投影，相較於習知技藝，減少製程道數，還降低了辨識裝置的厚度。In summary, the biometric identification device provided by the embodiment of the present invention uses a collimating structure instead of a collimating film. The horizontal projection of the first light transmission hole and the second light transmission hole of the collimation structure on the backlight module does not overlap the horizontal projection of the photodetector. Compared with the conventional technology, the number of manufacturing processes is reduced, and the identification device is also reduced. thickness of.

1、2、3、4:生物特徵辨識裝置 10:背光模組 20:透明基板 30:透明蓋板 100:穿透區 101:第一準直層 102:第二準直層 101H、201H、301H、401H:第一透光孔 102H、202H、302H、402H:第二透光孔 200:感測區 201:光偵測器 201E:透明電極層 202:開關元件 202M:遮蔽金屬層 202P:半導體層 202G:第一金屬層 202S:第二金屬層 BL:緩衝層 DL:資料線 ES1、ES2、ES3、ES4:準直結構 FG:手指 FP:指紋 GE:閘極電極 H1:距離 ILD1、ILD2:絕緣層 L1、L2:虛擬線 PL1、PL2:平坦化層 P1:虛擬點 P2:幾何中心 SL:掃描線 W1:寬度 θ1、θ2:夾角 1, 2, 3, 4: biometric identification device 10: Backlight module 20: Transparent substrate 30: Transparent cover 100: Penetration area 101: The first collimation layer 102: Second collimation layer 101H, 201H, 301H, 401H: the first light hole 102H, 202H, 302H, 402H: the second light hole 200: sensing area 201: Light detector 201E: transparent electrode layer 202: switch element 202M: masking metal layer 202P: semiconductor layer 202G: first metal layer 202S: second metal layer BL: buffer layer DL: data line ES1, ES2, ES3, ES4: collimation structure FG: finger FP: Fingerprint GE: gate electrode H1: Distance ILD1, ILD2: insulating layer L1, L2: virtual line PL1, PL2: planarization layer P1: virtual point P2: geometric center SL: scan line W1: width θ1, θ2: included angle

圖1A是根據本發明第一實施例的生物特徵辨識裝置的平面示意圖。 圖1B是根據本發明第一實施例的生物特徵辨識裝置的橫截面示意圖。 圖2A是根據本發明第二實施例的生物特徵辨識裝置的平面示意圖。 圖2B是根據本發明第二實施例的生物特徵辨識裝置的橫截面示意圖。 圖3A是根據本發明第三實施例的生物特徵辨識裝置的平面示意圖。 圖3B是根據本發明第三實施例的生物特徵辨識裝置的橫截面示意圖。 圖4A是根據本發明第四實施例的生物特徵辨識裝置的平面示意圖。 圖4B是根據本發明第四實施例的生物特徵辨識裝置的橫截面示意圖。 FIG. 1A is a schematic plan view of a biometric identification device according to a first embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of a biometric identification device according to a first embodiment of the present invention. FIG. 2A is a schematic plan view of a biometric identification device according to a second embodiment of the present invention. FIG. 2B is a schematic cross-sectional view of a biometric identification device according to a second embodiment of the present invention. FIG. 3A is a schematic plan view of a biometric identification device according to a third embodiment of the present invention. 3B is a schematic cross-sectional view of a biometric identification device according to a third embodiment of the present invention. FIG. 4A is a schematic plan view of a biometric identification device according to a fourth embodiment of the present invention. 4B is a schematic cross-sectional view of a biometric identification device according to a fourth embodiment of the present invention.

1:生物特徵辨識裝置 10:背光模組 20:透明基板 30:透明蓋板 100:穿透區 101:第一準直層 102:第二準直層 101H:第一透光孔 102H:第二透光孔 200:感測區 201:光偵測器 201E:透明電極層 202:開關元件 202M:遮蔽金屬層 202P:半導體層 202G:第一金屬層 202S:第二金屬層 BL:緩衝層 ES1:準直結構 FG:手指 FP:指紋 GE:閘極電極 H1:距離 ILD1、ILD2:絕緣層 PL1、PL2:平坦化層 W1:寬度 1: Biometric identification device 10: Backlight module 20: Transparent substrate 30: Transparent cover 100: Penetration area 101: The first collimation layer 102: Second collimation layer 101H: the first light hole 102H: Second light hole 200: sensing area 201: Light detector 201E: transparent electrode layer 202: switch element 202M: masking metal layer 202P: semiconductor layer 202G: first metal layer 202S: second metal layer BL: buffer layer ES1: Collimation structure FG: finger FP: Fingerprint GE: gate electrode H1: Distance ILD1, ILD2: insulating layer PL1, PL2: planarization layer W1: width

Claims (16)

一種生物特徵辨識裝置，包括：一背光模組；一光偵測器，設置於該背光模組上；一開關元件，設置於該背光模組上，且電性連接該光偵測器；以及至少一準直結構，設置於該背光模組上且具備一第一透光孔以及一第二透光孔，其中該第一透光孔以及該第二透光孔在該背光模組上的水平投影不重疊該光偵測器在該背光模組上的水平投影，其中該第一透光孔以及該第二透光孔分別由一第一準直層以及一第二準直層限定，該第一透光孔與該第二透光孔在該第一準直層的法線方向上的距離與該第一透光孔以及該第二透光孔中的一者的寬度的比值落在5至10的範圍內。 A biometric identification device, comprising: a backlight module; a photodetector disposed on the backlight module; a switch element disposed on the backlight module and electrically connected to the photodetector; and At least one collimation structure is arranged on the backlight module and has a first light transmission hole and a second light transmission hole, wherein the first light transmission hole and the second light transmission hole are on the backlight module The horizontal projection does not overlap the horizontal projection of the light detector on the backlight module, wherein the first light transmission hole and the second light transmission hole are respectively defined by a first collimation layer and a second collimation layer, The ratio of the distance between the first light transmission hole and the second light transmission hole in the normal direction of the first alignment layer to the width of one of the first light transmission hole and the second light transmission hole is On a scale of 5 to 10. 如請求項1所述的生物特徵辨識裝置，其中該開關元件包括一半導體層以及一遮蔽金屬層，該遮蔽金屬層被設置以避免該半導體層受該背光模組的照射，且該遮蔽金屬層與該第一透光孔以及該第二透光孔中的一者同層設置。 The biometric identification device as claimed in claim 1, wherein the switch element includes a semiconductor layer and a shielding metal layer, the shielding metal layer is set to prevent the semiconductor layer from being illuminated by the backlight module, and the shielding metal layer It is arranged on the same layer as one of the first light-transmitting hole and the second light-transmitting hole. 如請求項1所述的生物特徵辨識裝置，其中該第一準直層以及該第二準直層包括金屬。 The biometric identification device as claimed in claim 1, wherein the first alignment layer and the second alignment layer comprise metal. 如請求項3所述的生物特徵辨識裝置，其中該第二準直層電性連接該生物特徵辨識裝置的一共同電極。 The biometric identification device as claimed in claim 3, wherein the second alignment layer is electrically connected to a common electrode of the biometric identification device. 如請求項3所述的生物特徵辨識裝置，其中該第一透光孔與該第二透光孔為圓形，該第一透光孔的中心與該第二透光孔的中心的連線構成一第一虛擬線，該第一虛擬線與該第一準直層的法線之間夾設有一第一夾角，該第一夾角的大小落在2度至63度的範圍內。 The biometric identification device according to claim 3, wherein the first light-transmitting hole and the second light-transmitting hole are circular, and the line connecting the center of the first light-transmitting hole and the center of the second light-transmitting hole A first imaginary line is formed, and a first included angle is provided between the first imaginary line and the normal line of the first collimation layer, and the size of the first included angle falls within the range of 2 degrees to 63 degrees. 如請求項5所述的生物特徵辨識裝置，還包括一透明蓋板，該開關元件位於該背光模組以及該透明蓋板之間，該第一虛擬線與該透明蓋板遠離該背光模組的一表面相交於一虛擬點，該虛擬點與該光偵測器的一幾何中心的連線構成一第二虛擬線，該第二虛擬線與該第一準直層的法線之間夾設有一第二夾角，該第二夾角的大小落在2度至63度的範圍內。 The biometric identification device according to claim 5, further comprising a transparent cover, the switch element is located between the backlight module and the transparent cover, and the first imaginary line and the transparent cover are far away from the backlight module A surface intersects at a virtual point, and the line connecting the virtual point and a geometric center of the photodetector constitutes a second virtual line, which is sandwiched between the second virtual line and the normal line of the first collimating layer. A second included angle is provided, and the size of the second included angle falls within the range of 2 degrees to 63 degrees. 如請求項3所述的生物特徵辨識裝置，其中該開關元件包括一第一金屬層、一第二金屬層以及一半導體層，且該第一準直層與該第二金屬層同層設置。 The biometric identification device as claimed in claim 3, wherein the switch element includes a first metal layer, a second metal layer and a semiconductor layer, and the first alignment layer and the second metal layer are disposed in the same layer. 如請求項7所述的生物特徵辨識裝置，其中該第一金屬層在該背光模組上的水平投影部分重疊該半導體層在該背光模組上的水平投影，且該第一金屬層設置於該背光模組以及該半導體層之間。 The biometric identification device according to claim 7, wherein the horizontal projection of the first metal layer on the backlight module partly overlaps the horizontal projection of the semiconductor layer on the backlight module, and the first metal layer is disposed on Between the backlight module and the semiconductor layer. 如請求項7所述的生物特徵辨識裝置，其中該第二金屬層在該背光模組上的水平投影部分重疊該半導體層在該背光模組上的水平投影，且該第二金屬層設置於該背光模組以及該半導體層之間。 The biometric identification device according to claim 7, wherein the horizontal projection of the second metal layer on the backlight module partly overlaps the horizontal projection of the semiconductor layer on the backlight module, and the second metal layer is disposed on Between the backlight module and the semiconductor layer. 如請求項7所述的生物特徵辨識裝置，該開關元件還包括一遮蔽金屬層，且該半導體層設置於該光偵測器以及該遮蔽金屬層之間。 In the biometric identification device according to claim 7, the switch element further includes a shielding metal layer, and the semiconductor layer is disposed between the photodetector and the shielding metal layer. 如請求項7所述的生物特徵辨識裝置，其中該半導體層在該背光模組上的水平投影完全落在該第一金屬層以及該第二金屬層在該背光模組上的水平投影內。 The biometric identification device as claimed in claim 7, wherein the horizontal projection of the semiconductor layer on the backlight module completely falls within the horizontal projections of the first metal layer and the second metal layer on the backlight module. 如請求項3所述的生物特徵辨識裝置，其中該第二準直層在該背光模組上的水平投影部分重疊該光偵測器在該背光模組上的水平投影。 The biometric identification device as claimed in claim 3, wherein the horizontal projection of the second alignment layer on the backlight module partially overlaps the horizontal projection of the light detector on the backlight module. 如請求項3所述的生物特徵辨識裝置，還包括一透明電極層，電性連接該光偵測器，該透明電極層設置於該第一準直層以及該第二準直層之間，且該第二準直層在該背光模組上的水平投影部分重疊該透明電極層在該背光模組上的水平投影。 The biometric identification device according to claim 3, further comprising a transparent electrode layer electrically connected to the photodetector, the transparent electrode layer being disposed between the first alignment layer and the second alignment layer, And the horizontal projection of the second alignment layer on the backlight module partly overlaps the horizontal projection of the transparent electrode layer on the backlight module. 如請求項3所述的生物特徵辨識裝置，其中該第一準直層具備一開口，該開口在該背光模組上的水平投影至少部分重疊該光偵測器在該背光模組上的水平投影。 The biometric identification device as claimed in item 3, wherein the first alignment layer has an opening, and the horizontal projection of the opening on the backlight module at least partially overlaps the level of the photodetector on the backlight module projection. 如請求項1所述的生物特徵辨識裝置，其中該第一透光孔以及該第二透光孔皆為一條形，且該條形與該光偵測器的至少一部分輪廓共形。 The biometric identification device as claimed in claim 1, wherein the first light-transmitting hole and the second light-transmitting hole are both strip-shaped, and the strip conforms to at least a part of the contour of the light detector. 如請求項1所述的生物特徵辨識裝置，其中該第一透光孔以及該第二透光孔在該背光模組上的水平投影互不重疊。 The biometric identification device according to claim 1, wherein the horizontal projections of the first light transmission hole and the second light transmission hole on the backlight module do not overlap with each other.
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