TWI785858B - Biometric verification device - Google Patents
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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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Abstract
Description
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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:
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:
Claims (16)
Priority Applications (2)
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CN202210198609.9A CN114565949A (en) | 2021-05-18 | 2022-03-02 | Biometric feature identification device |
US17/689,991 US11694466B2 (en) | 2021-05-18 | 2022-03-09 | Biometric verification device |
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US202163189960P | 2021-05-18 | 2021-05-18 | |
US63/189,960 | 2021-05-18 |
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TW110131173A TWI777742B (en) | 2021-05-18 | 2021-08-24 | Fingerprint recognition device |
TW110133883A TWI785792B (en) | 2021-05-18 | 2021-09-11 | Dual sensing device |
TW110133895A TWI798824B (en) | 2021-05-18 | 2021-09-11 | Dual sensing device |
TW110136410A TWI798848B (en) | 2021-05-18 | 2021-09-30 | Fingerprint sensing module and display apparatus |
TW110136714A TWI825489B (en) | 2021-05-18 | 2021-10-01 | Fingerprint sensing module |
TW110137679A TWI785838B (en) | 2021-05-18 | 2021-10-12 | Fingerprint sensing device |
TW110138528A TWI789055B (en) | 2021-05-18 | 2021-10-18 | Biometric verification device |
TW110138517A TWI798878B (en) | 2021-05-18 | 2021-10-18 | Optical sensing device |
TW110139384A TWI785858B (en) | 2021-05-18 | 2021-10-22 | Biometric verification device |
TW110144599A TWI785910B (en) | 2021-05-18 | 2021-11-30 | Optical sensing device and electronic apparatus having the same |
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TW110131173A TWI777742B (en) | 2021-05-18 | 2021-08-24 | Fingerprint recognition device |
TW110133883A TWI785792B (en) | 2021-05-18 | 2021-09-11 | Dual sensing device |
TW110133895A TWI798824B (en) | 2021-05-18 | 2021-09-11 | Dual sensing device |
TW110136410A TWI798848B (en) | 2021-05-18 | 2021-09-30 | Fingerprint sensing module and display apparatus |
TW110136714A TWI825489B (en) | 2021-05-18 | 2021-10-01 | Fingerprint sensing module |
TW110137679A TWI785838B (en) | 2021-05-18 | 2021-10-12 | Fingerprint sensing device |
TW110138528A TWI789055B (en) | 2021-05-18 | 2021-10-18 | Biometric verification device |
TW110138517A TWI798878B (en) | 2021-05-18 | 2021-10-18 | Optical sensing device |
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TW202247435A (en) | 2022-12-01 |
TW202247033A (en) | 2022-12-01 |
TWI785792B (en) | 2022-12-01 |
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TW202247035A (en) | 2022-12-01 |
TWI789055B (en) | 2023-01-01 |
TWI798878B (en) | 2023-04-11 |
TW202247437A (en) | 2022-12-01 |
TW202247034A (en) | 2022-12-01 |
TWI777742B (en) | 2022-09-11 |
TW202247032A (en) | 2022-12-01 |
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TW202247438A (en) | 2022-12-01 |
TWI785838B (en) | 2022-12-01 |
TWI785910B (en) | 2022-12-01 |
TWI798848B (en) | 2023-04-11 |
TWI798824B (en) | 2023-04-11 |
TWI825489B (en) | 2023-12-11 |
TW202247431A (en) | 2022-12-01 |
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