TW202109256A

TW202109256A - Fingerprint identification device

Info

Publication number: TW202109256A
Application number: TW108129661A
Authority: TW
Inventors: 邱伯韋; 江立達; 林韋丞; 曾士修; 蕭建仁
Original assignee: 關鍵禾芯科技股份有限公司
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2021-03-01

Abstract

A fingerprint identification device includes a thin-film transistor substrate with a first side and second side, multiple thin-film transistor switches, multiple induction electrode, multiple signal lines and multiple data lines. The multiple thin-film transistor switches are disposed on first side of thin-film transistor substrate. Each of two induction electrodes are corresponded to the at least two thin-film transistor switches. A first induction electrode of the two induction electrodes is electrically connected to at least two thin-film transistor switches. A second induction electrode of the two induction electrodes is electrically connected to a ground terminal. The multiple signal lines and multiple data lines are electrically connected to the at least two thin-film transistor switches, respectively. Therefore, the device is attained to cost reduction.

Description

Fingerprint recognition device

本發明有關於一種指紋辨識裝置，尤指一種可達到降低成本的指紋辨識裝置。The present invention relates to a fingerprint identification device, in particular to a fingerprint identification device that can reduce costs.

指紋辨識模組已漸漸地成為電子裝置的標準配備之一，使用者可透過指紋辨識模組進行身分的識別，以對電子裝置進行解鎖，或可作為應用程式的操作之用。而為讓使用者更加方便地使用電子裝置，簡化電子裝置上的輸入操作也已成為一種趨勢，因此觸控輸入模組也漸漸取代了鍵盤輸入模組。在一些電子裝置中，例如：智慧型手機(smartphone)，具備觸控輸入功能的顯示模組也完全取代了按鍵輸入。而電子裝置在無按鍵的設計下，通常會將指紋辨識模組設置於顯示模組下方，如此，使用者便可將手指放置於顯示模組的顯示區位置以進行指紋的辨識。於現有技術中，如於美國專利公開第US2018239941A1號中，其係關於一種安裝在顯示器下方的半導體指紋感應器(即光學指紋傳感器)。在其說明書中，提出一種用於減輕莫爾效應的顯示器下光學指紋感測器佈置結構，所述電子裝置包括：顯示器，所述顯示器(如OLED顯示器)包括成行的圖元元件，所述成行的圖元元件平行於沿第軸線的第主要方向；以及光學感測器，所述光學感測器被安裝在所述顯示器下方，以透過該光學感測器接收從使用者的手指指紋反射回來光源來感測到指紋成像。但卻延伸另一問題，就是光學指紋傳感器由於是安裝在顯示面板的下方，使光學指紋傳感器必須藉由在上方的OLED顯示器內的發光二極體RGB產生的光，投射至上方觸摸OLED顯示器上表面的手指指紋後，需再等待從手指指紋上反射後，光學指紋傳感器才能感測到指紋成像，使得獲得指紋成像的過程中整個光源路徑長且繁雜，進而因光源也容易受到其他內部或外部因素干擾(如OLED顯示內部結構干擾或外部光線干擾)之外，且使用者的手指是直接觸摸在OLED顯示面板上，而非直接觸摸到光學指紋傳感器，以導致會辨識精準度不佳及辨識時間增長，而且整體價錢又相當昂貴。另外，光學指紋傳感器是另外組裝結合在OLED顯示器的下的製造便利性不佳且整體結構是相當複雜。The fingerprint recognition module has gradually become one of the standard equipment of electronic devices. Users can use the fingerprint recognition module to perform identity recognition to unlock the electronic device, or it can be used as an application operation. In order to allow users to use electronic devices more conveniently, it has become a trend to simplify the input operations on the electronic devices. Therefore, touch input modules have gradually replaced keyboard input modules. In some electronic devices, such as smart phones, display modules with touch input function have completely replaced key input. In an electronic device without a button design, the fingerprint recognition module is usually arranged under the display module, so that the user can place a finger on the display area of the display module to perform fingerprint recognition. In the prior art, such as in US Patent Publication No. US2018239941A1, it relates to a semiconductor fingerprint sensor (ie, an optical fingerprint sensor) installed under the display. In its specification, an arrangement structure of an optical fingerprint sensor under a display for reducing the moiré effect is proposed. The electronic device includes a display, the display (such as an OLED display) includes rows of picture element elements, and the rows The picture element element is parallel to the main direction along the first axis; and an optical sensor, the optical sensor is installed under the display to receive the fingerprint reflected from the user's finger through the optical sensor Light source to sense fingerprint imaging. But another problem is that because the optical fingerprint sensor is installed under the display panel, the optical fingerprint sensor must use the light generated by the light emitting diode RGB in the upper OLED display to project onto the upper touch OLED display. After the fingerprint on the surface of the finger, it needs to wait for reflection from the fingerprint of the finger before the optical fingerprint sensor can sense the fingerprint imaging, making the entire light source path long and complicated in the process of obtaining fingerprint imaging, and the light source is also vulnerable to other internal or external sources. Factor interference (such as OLED display internal structure interference or external light interference), and the user’s finger is directly touching the OLED display panel instead of directly touching the optical fingerprint sensor, resulting in poor recognition accuracy and recognition Time has increased, and the overall price is quite expensive. In addition, the optical fingerprint sensor is additionally assembled and combined with the OLED display, which has poor manufacturing convenience and the overall structure is quite complicated.

本發明之一目的在提供一種可達到降低成本的指紋辨識裝置。本發明之另一目的在提供一種可達到干擾降低的指紋辨識裝置。本發明之另一目的在提供一種一顯示面板可一體成型在一指紋辨識裝置上，以有效達到結構簡單及製造便利性佳的指紋辨識裝置。為達上述目的，本發明係提供一種指紋辨識裝置，包括一薄膜電晶體基板、複數指紋薄膜電晶體開關、複數感應電極、複數訊號線及複數資料線，該薄膜電晶體基板具有一第一側及一第二側，該複數指紋薄膜電晶體開關係設於該第一側，該每一指紋薄膜電晶體開關設有一閘極端、一源極端及一汲極端，該每二感應電極對應該至少二指紋薄膜電晶體開關，該每二感應電極中的一第一感應電極電性連接對應該至少二指紋薄膜電晶體開關中的一第一指紋薄膜電晶體開關的該汲極端，該每二感應電極中的一第二感應電極電性連接一接地端，該至少二指紋薄膜電晶體開關中的一第二指紋薄膜電晶體開關的該汲極端電性連接與該第一指紋薄膜電晶體開關的該源極端，該每一訊號線與對應該至少二電晶體開關件的該第一、二指紋薄膜電晶體開關的該閘極端共同電性連接，該每一資料線電性連接至對應該至少二指紋薄膜電晶體開關中的該第二指紋薄膜電晶體開關的該源極端；透過本發明的指紋辨識裝置的設計，使得有效達到降低成本、結構簡單及製造便性佳。One objective of the present invention is to provide a fingerprint identification device that can reduce the cost. Another object of the present invention is to provide a fingerprint recognition device that can reduce interference. Another object of the present invention is to provide a fingerprint recognition device with a display panel that can be integrally formed on a fingerprint recognition device, so as to effectively achieve a fingerprint recognition device with a simple structure and good manufacturing convenience. To achieve the above objective, the present invention provides a fingerprint recognition device, which includes a thin film transistor substrate, a plurality of fingerprint thin film transistor switches, a plurality of sensing electrodes, a plurality of signal lines and a plurality of data lines, the thin film transistor substrate has a first side And a second side, the plurality of fingerprint thin film transistor switches are arranged on the first side, each fingerprint thin film transistor switch is provided with a gate terminal, a source terminal and a drain terminal, and every two sensing electrodes correspond to at least Two fingerprint thin film transistor switches, a first sensing electrode of each of the two sensing electrodes is electrically connected to the drain terminal of a first fingerprint thin film transistor switch of at least two fingerprint thin film transistor switches, and each second sensing electrode A second sensing electrode of the electrodes is electrically connected to a ground terminal, and the drain terminal of a second fingerprint thin film transistor switch of the at least two fingerprint thin film transistor switches is electrically connected to the first fingerprint thin film transistor switch The source terminal, each signal line and the gate terminal of the first and second fingerprint thin film transistor switches corresponding to at least two transistor switch elements are electrically connected together, and each data line is electrically connected to at least the corresponding The source terminal of the second fingerprint thin film transistor switch among the two fingerprint thin film transistor switches; the design of the fingerprint identification device of the present invention effectively achieves cost reduction, simple structure and good manufacturing convenience.

本發明之上述目的及其結構與功能上的特性，將依據所附圖式之較佳實施例予以說明。本發明提供一種指紋辨識裝置，請參閱第1圖本發明之第一實施例之指紋辨識裝置之分解示意圖；第2圖本發明之第一實施例之指紋辨識裝置之組合示意圖；第3A圖本發明之第一實施例之在一替代實施例之指紋辨識裝置之組合示意圖；第3B圖本發明之第一實施例之在另一替代實施例之指紋辨識裝置之組合示意圖；第4A圖本發明之第一實施例之指紋辨識裝置之等效電路示意圖；第5A圖本發明之第一實施例之使用者的手指觸摸在指紋辨識裝置上之實施態樣示意圖；第5B圖本發明之第一實施例之使用者的手指觸摸在指紋辨識裝置上之另一實施態樣示意圖。如圖1、2、4A所示，該指紋辨識裝置2可應用於一電子裝置(圖中未示)或顯示裝置(圖中未示)上，該電子裝置可以是手機、筆記型電腦、工業電腦、伺服器或任意形式的電子裝置，或該顯示裝置可以為液晶顯示器(LCD)或有機發光二極體(OLED)顯示器，但本發明並不在此限。該指紋辨識裝置2包括一薄膜電晶體基板21、複數指紋薄膜電晶體開關22、複數感應電極23、複數訊號線24及複數資料線25，該薄膜電晶體基板21於本實施例表示為一玻璃基板，該薄膜電晶體基板21設有一第一側211與一第二側212，該複數指紋薄膜電晶體(TFT)開關為一非晶矽(amorphous silicon)薄膜電晶體(a-Si TFT)或一低溫多晶矽薄膜電晶體(LTPS-TFT)，該複數指紋薄膜電晶體設於該薄膜電晶體基板21的第一側211，該每一指紋薄膜電晶體開關設有一閘極端223、一源極端224及一汲極端225。在一實施例，該薄膜電晶體基板21為一高分子薄膜基板(如矽膠薄膜基板)、一陶瓷基板或一金屬基板。該複數感應電極23於本實施例表示為一透明感應電極，該複數感應電極23係由透明導電材料所形成，該透明導電材料係選自下列群組其中之一，氧化銦錫(indium tin oxide,ITO)、氧化銦鋅(indium zinc oxide,IZO)、氧化鎘錫(cadmium tin oxide,CTO)、氧化鋁鋅(aluminum zinc oxide,AZO)、氧化銦鋅錫(indium tin zinc oxide,ITZO)、氧化鋅(zinc oxide)、氧化鎘(cadmium oxide)、氧化鉿(hafnium oxide,HfO)、氧化銦鎵鋅(indium gallium zinc oxide,InGaZnO)、氧化銦鎵鋅鎂(indium gallium zinc magnesium oxide,InGaZnMgO)、氧化銦鎵鎂(indium gallium magnesium oxide,InGaMgO)或氧化銦鎵鋁(indium gallium aluminum oxide,InGaAlO) ) 、導電高分子、奈米碳管等。並該複數感應電極23設於對應該複數指紋薄膜電晶體開關22上方，且該每二感應電極23對應該至少二指紋薄膜電晶體開關22於本實施例表示為二個感應電極23對應二個指紋薄膜電晶體開關22為一組指紋辨識感應元件20，如圖5C所示，該薄膜電晶體基板21的第一側211上設有多組指紋辨識感應元件20。於具體實施時，也可設計二個感應電極對應至少二個以上(如三個或五個)指紋薄膜電晶體開關為一組指紋辨識感應元件20。該每一訊號線24與對應該至少二電晶體開關件的該第一、二指紋薄膜電晶體開關221、222的閘極端223共同電性連接，該每一資料線25電性連接至對應該至少二指紋薄膜電晶體開關22中的第二指紋薄膜電晶體開關222的源極端224，亦即如圖4A示，本實施例的每一訊號線24係沿第一方向(如圖中X方向)與對應多組指紋辨識感應元件20中每一列的第一、二指紋薄膜電晶體開關221、222的閘極端223共同電性連接一起，該每一資料線25係沿第二方向(如圖中Y方向)與對應多組指紋辨識感應元件20中每一行的第二指紋薄膜電晶體開關222的源極端224共同電性連接一起。並該複數訊號線24與該複數資料線25分別電性連接至一控制器5，該控制器5為一微控制器5(MCU)、一處理器、一單晶片或一數位訊號處理器(DSP)，該本實施例的控制器5設置在該薄膜電晶體基板21的第一側211，但並不侷限於此，於具體實施時，該控制器5可透過一訊號線24(如軟性訊號排線)與對應該複數訊號線24與複數訊號線24電性連接，或是與一顯示面板(圖中未示)上的控制器5共用。在一實施例，參閱第4B圖，該複數訊號線24與該複數資料線25分別電性連接至少一選擇器51(如multiplexer，MUX；數據選擇器)的一側，此在一實施例的選擇器51是表示2選1的選擇器。但並不侷限於此，於其他實施例的選擇器也可選擇為如3選1的選擇器或4選擇1的選擇器，依此類推；並該選擇器51的另一側電性連接該控制器5，透過該選擇器51將多條訊號線24與多條資料線25連接至該控制器5的線路大幅減少，且讓該控制器5更可多出的接腳用以供其他控制使用外，還能將單一規格或型號的控制器5適用在不同尺寸的指紋辨識裝置2上，藉以達到不需做更換及節省成本的效果。在另一實施例，多條訊號線24電性連接該控制器5，該選擇器51的一側電性連接多條資料線25，該選擇器52的另一側電性連接該控制器5。為了方便敘述，如下以單一組指紋辨識感應元件20做說明：每二感應電極23中的一第一感應電極231電性連接對應該至少二指紋薄膜電晶體開關22中的一第一指紋薄膜電晶體開關221的汲極端225，該每二感應電極23中的一第二感應電極232電性連接一接地端29，該至少二指紋薄膜電晶體開關22中的一第二指紋薄膜電晶體開關222的汲極端225電性連接與該第一指紋薄膜電晶體開關221的源極端224，且每二感應電極23中的第一感應電極231為如X方向感應電極位於對應該至少二指紋薄膜電晶體開關22的上方，且該每二感應電極23中的第一感應電極231與對應該二指紋薄膜電晶體開關23彼此之間設有一第一絕緣膜26，該每二感應電極23中的該第二感應電極232為如Y方向感應電極位於對應該第一感應電極231的上方，且該第一、二感應電極彼此之間設有一第二絕緣膜27，一保護膜28的一側與對應該每二感應電極23中的第二感應電極232的一側相貼設，且該保護膜28位於該第二感應電極232的上方，該第一、二絕緣膜與保護膜28的材料為如矽氧化物(SiOx)、鈦氧化物(TiOx)、鈮氧化物(NbOx)、矽氮化物(SiNx)、矽氧氮化物(SiOxNy)、鋁氧化物(AlOx)、鋁氧氮化物(AlOxNy)、二氟化鎂(MgF2)和鉭氧化物(TaOx)) 或任何適合之透明有機材料。並於具體實施時，前述第一絕緣膜26分別與對應前述第一感應電極231及該二指紋薄膜電晶體開關23處開設有一用以供電性連接的貫孔(圖中未示)，使該第一感應電極231透過該貫孔與對應二指紋薄膜電晶體開關23電性連接，該第二絕緣膜27分別與對應該第一、二感應電極231、232處開設有一用以供電性連接的另一貫孔(圖中未示)，使該第二感應電極232透過該另一貫孔與對應該第一感應電極231電性連接。在一實施例，該保護膜28也可為一玻璃材料。另外，參閱第5A、5B、5C圖，輔以參閱第4A圖；如圖所示，在該薄膜電晶體基板21上的第二側212受一使用者8的手指觸摸時會與對應該每二感應電極23的第一感應電極231之間存在一靜電電容CS，且該每二感應電極23之間也形成有一電容C1。所以當指紋辨識裝置2未指紋辨識時，前述指紋辨識感應元件20內的第一、二指紋辨識電晶體開關221、222的閘極端223經由對應的訊號線24接收該控制器5傳送的一驅動訊號為高電壓訊號時，該第一、二指紋辨識電晶體開關221、222被導通(或被打開)後，由該資料線25的資料電壓對該電容C1進行充電至飽和，待該驅動訊號為低電壓訊號時，該第一、二指紋辨識電晶體開關221、222而不導通(或被關閉)，此時該資料線25則呈浮接(floating)狀態。若當使用者8的一手指81觸摸在該指紋辨識裝置2的薄膜電晶體基板21之第二側212(或保護膜28的另一側)上進行指紋辨識時，該驅動訊號為高電壓訊號導通該第一、二指紋辨識電晶體開關221、222後，使資料線25的資料電壓對該靜電電容CS與電容C1進行充電至飽和後，待該驅動訊號為低電壓訊號時，該第一、二指紋辨識電晶體開關221、222不導通(或被關閉)，該資料線25則呈浮接(floating)狀態，待下次的該驅動訊號為高電壓訊號再次導通該第一、二指紋辨識電晶體開關221、222時，該靜電電容CS與電容C1進行放電，此時該控制器5可經由對應的資料線25上的資料電壓變化量而獲得一指紋辨識影像(如手指指紋影像)。在一替代實施例，參閱第3A、5C圖，該複數感應電極23與該複數指紋薄膜電晶體開關22對應設置在該薄膜電晶體基板21的該第一側211上，各組指紋辨識感應元件20的每二感應電極23分別位在對應該至少二指紋薄膜電晶體開關22的一側且相互平行，該保護膜28的一側與對應該複數指紋薄膜電晶體22與該複數感應電極23的一側相貼設。在另一替代實施例，參閱第3B、5C圖，各組指紋辨識感應元件20的每二感應電極23位於對應該至少二指紋薄膜電晶體開關22的上方，且該每二感應電極23與對應該至少二指紋薄膜電晶體開關22彼此之間設有該第一絕緣膜26，該每二感應電極23的第一、二感應電極231、232平行設置在對應該至少二指紋薄膜電晶體開關22的第一絕緣膜26一側上，該保護膜28的一側與對應該每二感應電極23的一側相貼設。因此，透過本發明指紋辨識裝置2的設計，使得可有效達到降低成本、結構簡單及製造便性性佳。請參閱第6A圖本發明之第二實施例之指紋辨識裝置與顯示面板一體成型之組合示意圖；第6B圖本發明之第二實施例之在一替代實施例之指紋辨識裝置與顯示面板一體成型之組合示意圖；第7A圖本發明之第二實施例之在另一替代實施例之指紋辨識裝置與顯示面板一體成型之組合示意圖；第7B圖本發明之第二實施例之在另一替代實施例之指紋辨識裝置與顯示面板一體成型之組合示意圖；第8圖本發明之第二實施例之使用者的手指觸摸在該顯示面板上的指紋辨識裝置之做動示意圖，輔以參閱第1、4A圖。該本實施例主要是將前述第一實施例的指紋辨識裝置2應用於一顯示面板3上，且以一體成型方式製造出具指紋辨識的顯示面板3，亦即該指紋辨識裝置2的保護膜28的另一側上依序層疊設置一彩色濾光基板35(Color Filter Substrate)、複數上電極32(如ITO)、一液晶層33(Liquid Crystal Layer)、複數下電極34(如ITO)及一薄膜電晶體陣列基板31(TFT Array Substrate)，以一體構成前述具指紋辨識的顯示面板3(如液晶顯示面板；LCD面板)，且本實施例的指紋辨識裝置2設置在該顯示面板3的一顯示區37，複數訊號線24與複數資料線25及控制器5則設置在顯示面板3的一非顯示區38，所以使用者8的手指81可直接觸摸在對應該顯示面板3的顯示區37上的薄膜電晶體基板21的第二側212進行指紋辨識。並於具體實時，該指紋辨識裝置1的面積可以等於或小於該顯示面板3的面積。在一替代實施例，參閱第6B圖，在該指紋辨識裝置2的第二側212上依序層疊設置前述彩色濾光基板35、複數上電極32、液晶層33、複數下電極34及薄膜電晶體陣列基板31，以一體構成前述具指紋辨識的顯示面板3(如液晶顯示面板)，令使用者8可直接觸摸在對應該顯示面板3的顯示區37上的保護膜28的另一側上進行指紋辨識。在另一替代實施例，參閱第7A圖，該保護膜28的另一側上依序層疊設置一玻璃基板45、複數第二電極44(如ITO)、有機發光層43、複數第一電極42(如ITO)及一薄膜電晶體陣列基板41(TFT Array Substrate)，以一體構成一具指紋辨識的顯示面板4(如有機發光顯示面板；OLED面板)，所以使用者8的手指81可直接觸摸在對應該顯示面板4的顯示區47上的薄膜電晶體基板21的第二側212進行指紋辨識，並複數訊號線24與複數資料線25及控制器5則設置在顯示面板4的非顯示區48，且於本另一實施的第一電極42為陽極電極，且為不透明的銦錫氧化物(indium－tin－oxide；ITO)電極，該第二電極44為陰極電極，且為透明或半透明電極(如ITO)。在另一替代實施例，參閱第7B圖，該薄膜電晶體基板21的該第二側212上依序層疊設置該玻璃基板45、複數第二電極44(如ITO)、有機發光層43、複數第一電極42(如ITO)及薄膜電晶體陣列基板41，以一體構成一具指紋辨識的顯示面板4(如OLED面板)，令使用者8可直接觸摸在對應該顯示面板4的顯示區47上的保護膜28的另一側上進行指紋辨識。因此，藉由本發明指紋辨識裝置2與顯示面板3、4一體成型結合的設計，讓使用者8的手指81是直接觸摸在指紋辨識裝置2本身上來進行指紋辨識，以有效提高指紋辨識精準度、辨識速度及降低干擾，且還有效達到製造便利性佳、結構簡單及降低成本。The above-mentioned objects and structural and functional characteristics of the present invention will be described based on the preferred embodiments of the accompanying drawings. The present invention provides a fingerprint recognition device. Please refer to Fig. 1 for the exploded schematic diagram of the fingerprint recognition device of the first embodiment of the present invention; Fig. 2 is a schematic diagram for the assembly of the fingerprint recognition device of the first embodiment of the present invention; and Fig. 3A The first embodiment of the invention is a schematic diagram of the combination of a fingerprint recognition device in an alternative embodiment; Figure 3B is a schematic diagram of the combination of the fingerprint recognition device in another alternative embodiment of the first embodiment of the invention; Figure 4A is a schematic diagram of the fingerprint recognition device of another alternative embodiment. The schematic diagram of the equivalent circuit of the fingerprint recognition device of the first embodiment; Fig. 5A is a schematic diagram of the implementation of the user’s finger touching the fingerprint recognition device of the first embodiment of the present invention; Fig. 5B is the first embodiment of the present invention A schematic diagram of another implementation aspect of the user's finger touching the fingerprint recognition device of the embodiment. As shown in Figures 1, 2, and 4A, the fingerprint recognition device 2 can be applied to an electronic device (not shown in the figure) or a display device (not shown in the figure). The electronic device can be a mobile phone, a notebook computer, an industrial A computer, a server, or any form of electronic device, or the display device can be a liquid crystal display (LCD) or an organic light emitting diode (OLED) display, but the invention is not limited thereto. The fingerprint identification device 2 includes a thin film transistor substrate 21, a plurality of fingerprint thin film transistor switches 22, a plurality of sensing electrodes 23, a plurality of signal lines 24, and a plurality of data lines 25. The thin film transistor substrate 21 is represented as a glass in this embodiment. The thin film transistor substrate 21 is provided with a first side 211 and a second side 212, and the plurality of fingerprint thin film transistors (TFT) switches are an amorphous silicon thin film transistor (a-Si TFT) or A low-temperature polysilicon thin film transistor (LTPS-TFT), the plurality of fingerprint thin film transistors are arranged on the first side 211 of the thin film transistor substrate 21, and each fingerprint thin film transistor switch is provided with a gate terminal 223 and a source terminal 224 And an extreme 225. In one embodiment, the thin film transistor substrate 21 is a polymer thin film substrate (such as a silicon thin film substrate), a ceramic substrate, or a metal substrate. The plurality of sensing electrodes 23 is represented as a transparent sensing electrode in this embodiment. The plurality of sensing electrodes 23 are formed of a transparent conductive material. The transparent conductive material is selected from one of the following groups. Indium tin oxide (indium tin oxide) ,ITO), indium zinc oxide (IZO), cadmium tin oxide (CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), Zinc oxide, cadmium oxide, hafnium oxide (HfO), indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO) , Indium gallium magnesium oxide (InGaMgO) or indium gallium aluminum oxide (InGaAlO), conductive polymers, carbon nanotubes, etc. And the plurality of sensing electrodes 23 are arranged above the corresponding fingerprint thin film transistor switches 22, and every two sensing electrodes 23 corresponding to at least two fingerprint thin film transistor switches 22 are shown in this embodiment as two sensing electrodes 23 corresponding to two The fingerprint thin film transistor switch 22 is a set of fingerprint identification sensing elements 20. As shown in FIG. 5C, a plurality of sets of fingerprint identification sensing elements 20 are provided on the first side 211 of the thin film transistor substrate 21. In specific implementation, it is also possible to design two sensing electrodes corresponding to at least two (such as three or five) fingerprint thin film transistor switches as a set of fingerprint identification sensing elements 20. Each signal line 24 is electrically connected to the gate terminal 223 of the first and second fingerprint thin film transistor switches 221, 222 corresponding to at least two transistor switch components, and each data line 25 is electrically connected to the corresponding The source terminal 224 of the second fingerprint thin film transistor switch 222 of the at least two fingerprint thin film transistor switches 22, that is, as shown in FIG. 4A, each signal line 24 of this embodiment is along the first direction (the X direction in the figure) ) And the gate terminals 223 of the first and second fingerprint thin film transistor switches 221, 222 corresponding to each row in the plurality of sets of fingerprint recognition sensor elements 20 are electrically connected together, and each data line 25 is along the second direction (as shown in FIG. The middle Y direction) is electrically connected to the source terminal 224 of the second fingerprint thin film transistor switch 222 corresponding to each row of the plurality of fingerprint identification sensing elements 20. And the plurality of signal lines 24 and the plurality of data lines 25 are electrically connected to a controller 5, which is a microcontroller 5 (MCU), a processor, a single chip or a digital signal processor ( DSP). The controller 5 of this embodiment is arranged on the first side 211 of the thin film transistor substrate 21, but it is not limited to this. In specific implementation, the controller 5 can pass through a signal line 24 (such as a soft The signal cable) is electrically connected to the corresponding plural signal lines 24 and the plural signal lines 24, or is shared with the controller 5 on a display panel (not shown in the figure). In one embodiment, referring to FIG. 4B, the plurality of signal lines 24 and the plurality of data lines 25 are respectively electrically connected to one side of at least one selector 51 (such as multiplexer, MUX; data selector). The selector 51 is a selector indicating 2 out of one. However, it is not limited to this. In other embodiments, the selector may be a selector such as 3 out of 1, or 4 out of 1, and so on; and the other side of the selector 51 is electrically connected to the The controller 5 greatly reduces the number of lines connecting the multiple signal lines 24 and the multiple data lines 25 to the controller 5 through the selector 51, and allows the controller 5 to have more pins for other controls In addition to use, a controller 5 of a single specification or model can be applied to fingerprint identification devices 2 of different sizes, thereby achieving the effect of eliminating the need for replacement and saving costs. In another embodiment, multiple signal lines 24 are electrically connected to the controller 5, one side of the selector 51 is electrically connected to multiple data lines 25, and the other side of the selector 52 is electrically connected to the controller 5 . For the convenience of description, a single set of fingerprint recognition sensor elements 20 is used for description as follows: A first sensing electrode 231 in every two sensing electrodes 23 is electrically connected to the drain terminal 225 of a first fingerprint thin film transistor switch 221 in at least two fingerprint thin film transistor switches 22. A second sensing electrode 232 is electrically connected to a ground terminal 29, and the drain terminal 225 of a second fingerprint thin film transistor switch 222 of the at least two fingerprint thin film transistor switches 22 is electrically connected to the first fingerprint thin film transistor switch The source terminal 224 of 221, and the first sensing electrode 231 in every two sensing electrodes 23 is such that the X-direction sensing electrode is located above the at least two fingerprint thin film transistor switches 22, and the first sensing electrode 23 in every second sensing electrode 23 The sensing electrode 231 and the corresponding two fingerprint thin film transistor switches 23 are provided with a first insulating film 26 between each other. The second sensing electrode 232 in each of the two sensing electrodes 23 is such that the Y-direction sensing electrode is located corresponding to the first sensing Above the electrode 231, a second insulating film 27 is provided between the first and second sensing electrodes. One side of the protective film 28 is opposite to the side corresponding to the second sensing electrode 232 in each of the second sensing electrodes 23. And the protective film 28 is located above the second sensing electrode 232. The materials of the first and second insulating films and the protective film 28 are silicon oxide (SiOx), titanium oxide (TiOx), niobium oxide (NbOx), silicon nitride (SiNx), silicon oxynitride (SiOxNy), aluminum oxide (AlOx), aluminum oxynitride (AlOxNy), magnesium difluoride (MgF2) and tantalum oxide (TaOx)) or Any suitable transparent organic material. In actual implementation, a through hole (not shown in the figure) for power supply connection is opened on the first insulating film 26 and corresponding to the first sensing electrode 231 and the two fingerprint thin film transistor switches 23, so that the The first sensing electrode 231 is electrically connected to the corresponding two fingerprint thin film transistor switches 23 through the through hole, and the second insulating film 27 is provided with a power supply connection corresponding to the first and second sensing electrodes 231 and 232 respectively. Another through hole (not shown in the figure) allows the second sensing electrode 232 to pass through the other through hole to be electrically connected to the corresponding first sensing electrode 231. In one embodiment, the protective film 28 may also be a glass material. In addition, please refer to Figures 5A, 5B, and 5C, supplemented by Figure 4A; as shown in the figure, when the second side 212 on the thin film transistor substrate 21 is touched by a user 8’s finger, it will correspond to each other. There is an electrostatic capacitance CS between the first sensing electrodes 231 of the two sensing electrodes 23, and a capacitance C1 is also formed between every two sensing electrodes 23. Therefore, when the fingerprint recognition device 2 is not fingerprint recognized, the gate terminals 223 of the first and second fingerprint recognition transistor switches 221 and 222 in the aforementioned fingerprint recognition sensor element 20 receive a drive sent by the controller 5 via the corresponding signal line 24. When the signal is a high voltage signal, after the first and second fingerprint identification transistor switches 221, 222 are turned on (or turned on), the data voltage of the data line 25 charges the capacitor C1 to saturation, and waits for the drive signal When it is a low voltage signal, the first and second fingerprint identification transistor switches 221 and 222 are not turned on (or turned off), and the data line 25 is in a floating state at this time. If a finger 81 of the user 8 touches the second side 212 (or the other side of the protective film 28) of the thin film transistor substrate 21 of the fingerprint recognition device 2 for fingerprint recognition, the driving signal is a high voltage signal After the first and second fingerprint identification transistor switches 221 and 222 are turned on, the data voltage of the data line 25 is charged to the electrostatic capacitor CS and the capacitor C1 to saturation. When the driving signal is a low voltage signal, the first 2. The fingerprint identification transistor switches 221, 222 are not turned on (or turned off), the data line 25 is in a floating state, and the first and second fingerprints will be turned on again when the next drive signal is a high voltage signal When the transistor switches 221 and 222 are recognized, the electrostatic capacitor CS and the capacitor C1 are discharged. At this time, the controller 5 can obtain a fingerprint recognition image (such as a fingerprint image of a finger) based on the data voltage change on the corresponding data line 25 . In an alternative embodiment, referring to Figures 3A and 5C, the plurality of sensing electrodes 23 and the plurality of fingerprint thin film transistor switches 22 are correspondingly disposed on the first side 211 of the thin film transistor substrate 21, and each group of fingerprint identification sensing elements Each two sensing electrodes 23 of 20 are respectively located on one side corresponding to at least two fingerprint thin film transistor switches 22 and parallel to each other, and one side of the protective film 28 corresponds to the plurality of fingerprint thin film transistors 22 and the plurality of sensing electrodes 23. Set on one side. In another alternative embodiment, referring to Figures 3B and 5C, every two sensing electrodes 23 of each group of fingerprint recognition sensing elements 20 are located above the corresponding at least two fingerprint thin film transistor switches 22, and the two sensing electrodes 23 are opposite to each other. At least two fingerprint thin film transistor switches 22 should be provided with the first insulating film 26 between each other. The first and second sensing electrodes 231, 232 of each of the two sensing electrodes 23 are arranged in parallel corresponding to the at least two fingerprint thin film transistor switches 22. On one side of the first insulating film 26, one side of the protective film 28 is attached to the side corresponding to each second sensing electrode 23. Therefore, through the design of the fingerprint identification device 2 of the present invention, cost reduction, simple structure and good manufacturing convenience can be effectively achieved. Please refer to FIG. 6A for the integrated schematic diagram of the fingerprint identification device and the display panel in the second embodiment of the present invention; FIG. 6B is an alternative embodiment of the fingerprint identification device and the display panel in the second embodiment of the present invention. Schematic diagram of the combination; Figure 7A of the second embodiment of the present invention in another alternative embodiment of the fingerprint identification device and display panel integrated schematic diagram; Figure 7B of the second embodiment of the present invention in another alternative implementation Example of a combined schematic diagram of a fingerprint recognition device and a display panel integrally formed; Fig. 8 is a schematic diagram of the operation of the fingerprint recognition device touching the display panel by a user’s finger in the second embodiment of the present invention, supplemented by reference 1 Figure 4A. In this embodiment, the fingerprint recognition device 2 of the first embodiment is applied to a display panel 3, and the display panel 3 with fingerprint recognition is manufactured in an integrated manner, that is, the protective film 28 of the fingerprint recognition device 2 A color filter substrate 35 (Color Filter Substrate), a plurality of upper electrodes 32 (such as ITO), a liquid crystal layer 33 (Liquid Crystal Layer), a plurality of lower electrodes 34 (such as ITO) and a The thin film transistor array substrate 31 (TFT Array Substrate) integrally constitutes the aforementioned display panel 3 (such as a liquid crystal display panel; LCD panel) with fingerprint recognition, and the fingerprint recognition device 2 of this embodiment is disposed on one of the display panels 3. The display area 37, the plural signal lines 24 and the plural data lines 25, and the controller 5 are arranged in a non-display area 38 of the display panel 3, so the finger 81 of the user 8 can directly touch the display area 37 corresponding to the display panel 3. Fingerprint recognition is performed on the second side 212 of the upper thin film transistor substrate 21. And in real time, the area of the fingerprint identification device 1 can be equal to or smaller than the area of the display panel 3. In an alternative embodiment, referring to FIG. 6B, on the second side 212 of the fingerprint identification device 2, the aforementioned color filter substrate 35, a plurality of upper electrodes 32, a liquid crystal layer 33, a plurality of lower electrodes 34, and thin-film electronics are sequentially laminated and arranged. The crystal array substrate 31 integrally constitutes the aforementioned display panel 3 (such as a liquid crystal display panel) with fingerprint recognition, so that the user 8 can directly touch the other side of the protective film 28 on the display area 37 of the display panel 3 Perform fingerprint recognition. In another alternative embodiment, referring to FIG. 7A, a glass substrate 45, a plurality of second electrodes 44 (such as ITO), an organic light-emitting layer 43, and a plurality of first electrodes 42 are sequentially stacked on the other side of the protective film 28. (Such as ITO) and a thin film transistor array substrate 41 (TFT Array Substrate) to form a fingerprint recognition display panel 4 (such as organic light emitting display panel; OLED panel), so the user 8’s finger 81 can directly touch Fingerprint identification is performed on the second side 212 of the thin film transistor substrate 21 corresponding to the display area 47 of the display panel 4, and the plurality of signal lines 24, the plurality of data lines 25 and the controller 5 are arranged in the non-display area of the display panel 4. 48, and the first electrode 42 in this embodiment is an anode electrode and is an opaque indium-tin-oxide (ITO) electrode, and the second electrode 44 is a cathode electrode and is transparent or semi-transparent. Transparent electrode (such as ITO). In another alternative embodiment, referring to FIG. 7B, the glass substrate 45, a plurality of second electrodes 44 (such as ITO), an organic light emitting layer 43, a plurality of layers are sequentially laminated on the second side 212 of the thin film transistor substrate 21 The first electrode 42 (such as ITO) and the thin film transistor array substrate 41 form an integrated display panel 4 (such as an OLED panel) with fingerprint recognition, so that the user 8 can directly touch the display area 47 corresponding to the display panel 4 Fingerprint recognition is performed on the other side of the protective film 28. Therefore, with the integrated design of the fingerprint recognition device 2 and the display panels 3 and 4 of the present invention, the finger 81 of the user 8 directly touches the fingerprint recognition device 2 itself for fingerprint recognition, thereby effectively improving the accuracy of fingerprint recognition. Recognize speed and reduce interference, and also effectively achieve good manufacturing convenience, simple structure and lower cost.

2:指紋辨識裝置 20:指紋辨識感應元件 21:薄膜電晶體基板 211、212:第一、二側 22:指紋薄膜電晶體開關 221、222:第一、二指紋薄膜電晶體開關 223:閘極端 224:源極端 225:汲極端 23:感應電極 231、232:第一、二感應電極 24:訊號線 25:資料線 26、27:第一、二絕緣膜 28:保護膜 29:接地端 3、4:顯示面板 31、41:薄膜電晶體陣列基板 32:上電極 33:液晶層 34:下電極 35:彩色濾光基板 42、44:第一、二電極 43:有機發光層 45:玻璃基板 37、47:顯示區 38、48:非顯示區 5:控制器 51:選擇器 7:選擇器 CS:靜電電容 C1:電容 8:使用者 81:手指2: Fingerprint recognition device 20: Fingerprint recognition sensor element 21: Thin film transistor substrate 211, 212: first and second sides 22: Fingerprint thin film transistor switch 221, 222: first and second fingerprint thin film transistor switches 223: gate extreme 224: Source Extreme 225: Explosive 23: Sensing electrode 231, 232: the first and second sensing electrodes 24: signal line 25: data line 26, 27: first and second insulating film 28: Protective film 29: Ground terminal 3, 4: display panel 31, 41: Thin film transistor array substrate 32: Upper electrode 33: liquid crystal layer 34: Lower electrode 35: Color filter substrate 42, 44: the first and second electrodes 43: organic light emitting layer 45: glass substrate 37, 47: display area 38, 48: non-display area 5: Controller 51: selector 7: selector CS: Electrostatic capacitance C1: Capacitance 8: User 81: finger

第1圖本發明之第一實施例之指紋辨識裝置之分解示意圖。第2圖本發明之第一實施例之指紋辨識裝置之組合示意圖。第3A圖本發明之第一實施例之在一替代實施例之指紋辨識裝置之組合示意圖。第3B圖本發明之第一實施例之在另一替代實施例之指紋辨識裝置之組合示意圖。第4A圖本發明之第一實施例之指紋辨識裝置之等效電路示意圖。第4B圖本發明之第一實施例之在一實施例之指紋辨識裝置之等效電路示意圖。第5A圖本發明之第一實施例之使用者的手指觸摸在指紋辨識裝置上之實施態樣示意圖。第5B圖本發明之第一實施例之使用者的手指觸摸在指紋辨識裝置上之另一實施態樣示意圖。第5C圖本發明之第一實施例之使用者的手指觸摸在指紋辨識裝置上之做動示意圖。第6A圖本發明之第二實施例之指紋辨識裝置與顯示面板一體成型之組合示意圖。第6B圖本發明之第二實施例之在一替代實施例之指紋辨識裝置與顯示面板一體成型之組合示意圖。第7A圖本發明之第二實施例之在另一替代實施例之指紋辨識裝置與顯示面板一體成型之組合示意圖。第7B圖本發明之第二實施例之在另一替代實施例之指紋辨識裝置與顯示面板一體成型之組合示意圖。第8圖本發明之第二實施例之使用者的手指觸摸在該顯示面板上的指紋辨識裝置之做動示意圖。Figure 1 is an exploded schematic diagram of the fingerprint identification device of the first embodiment of the present invention. Figure 2 is a schematic diagram of the combination of the fingerprint identification device of the first embodiment of the present invention. FIG. 3A is a schematic diagram of the combination of the fingerprint recognition device of an alternative embodiment of the first embodiment of the present invention. FIG. 3B is a schematic diagram of the combination of the fingerprint identification device in another alternative embodiment of the first embodiment of the present invention. Fig. 4A is a schematic diagram of the equivalent circuit of the fingerprint identification device of the first embodiment of the present invention. FIG. 4B is a schematic diagram of the equivalent circuit of the fingerprint recognition device in one embodiment of the first embodiment of the present invention. FIG. 5A is a schematic diagram of the implementation of the fingerprint recognition device with the user's finger touching the fingerprint recognition device according to the first embodiment of the present invention. FIG. 5B is a schematic diagram of another implementation aspect of the user's finger touching the fingerprint recognition device in the first embodiment of the present invention. FIG. 5C is a schematic diagram of the action of the user's finger touching the fingerprint recognition device in the first embodiment of the present invention. FIG. 6A is a schematic diagram of a combination of a fingerprint identification device and a display panel in an integrated manner according to the second embodiment of the present invention. FIG. 6B is a schematic diagram of a combination of an alternative embodiment of the fingerprint identification device and the display panel in the second embodiment of the present invention. FIG. 7A is a schematic diagram of a combination of a fingerprint identification device and a display panel integrally formed in another alternative embodiment of the second embodiment of the present invention. FIG. 7B is a schematic diagram of a combination of a fingerprint identification device and a display panel in an integrated form in another alternative embodiment of the second embodiment of the present invention. FIG. 8 is a schematic diagram of the action of the fingerprint recognition device touching the display panel with the user's finger in the second embodiment of the present invention.

2:指紋辨識裝置 2: Fingerprint recognition device

21:薄膜電晶體基板 21: Thin film transistor substrate

22:指紋薄膜電晶體開關 22: Fingerprint thin film transistor switch

23:感應電極 23: Sensing electrode

231、232:第一、二感應電極 231, 232: the first and second sensing electrodes

26、27:第一、二絕緣膜 26, 27: first and second insulating film

28:保護膜 28: Protective film

Claims

A fingerprint identification device includes: A thin film transistor substrate having a first side and a second side; A plurality of fingerprint thin film transistor switches are arranged on the first side, and each fingerprint thin film transistor switch is provided with a gate terminal, a source terminal and a drain terminal; A plurality of sensing electrodes, each of the two sensing electrodes corresponds to at least two fingerprint thin film transistor switches, and a first sensing electrode of each of the two sensing electrodes is electrically connected to a first fingerprint film corresponding to at least two fingerprint thin film transistor switches The drain terminal of the transistor switch, a second sensing electrode of each of the two sensing electrodes is electrically connected to a ground terminal, and the drain terminal of a second fingerprint thin film transistor switch of the at least two fingerprint thin film transistor switches is electrically connected Sexually connected to the source terminal of the first fingerprint thin film transistor switch; A plurality of signal lines, each of the signal lines is electrically connected to the gate terminal of the first and second fingerprint thin film transistor switches corresponding to at least two transistor switch components; and A plurality of data lines, each of the data lines is electrically connected to the source terminal of the second fingerprint thin film transistor switch corresponding to at least two fingerprint thin film transistor switches.

According to the fingerprint recognition device described in item 1 of the scope of patent application, wherein the plurality of sensing electrodes are arranged above the thin film transistor switch corresponding to the plurality of fingerprints, and the first sensing electrode of each of the two sensing electrodes is located corresponding to at least two fingerprints A first insulating film is arranged above the thin film transistor switch and between each other, and the second sensing electrode of each of the two sensing electrodes is located above the corresponding first sensing electrode and a second insulating film is arranged between each other. One side of the protective film is attached to a side corresponding to the second sensing electrode in every two sensing electrodes, and the protective film is located above the second sensing electrode.

According to the fingerprint recognition device described in item 1 of the scope of patent application, the plurality of sensing electrodes and the plurality of fingerprint thin film transistor switches are correspondingly disposed on the first side of the thin film transistor substrate, and each two sensing electrodes are respectively located on the first side of the thin film transistor substrate. One side corresponding to at least two fingerprint thin film transistor switches, one side of a protective film is attached to the side corresponding to the plurality of fingerprint thin film transistors and the plurality of sensing electrodes.

According to the fingerprint recognition device described in item 1 of the scope of patent application, the plurality of sensing electrodes are arranged above the plurality of fingerprint thin film transistor switches, and each of the two sensing electrodes is positioned above the corresponding at least two fingerprint thin film transistor switches. A first insulating film is arranged between each other, the two sensing electrodes are arranged on the first insulating film corresponding to at least two fingerprint thin film transistor switches, one side of the protective film and the side corresponding to each two sensing electrodes Attached.

According to the fingerprint recognition device described in item 2 of the scope of patent application, a color filter substrate, a plurality of upper electrodes, a liquid crystal layer, a plurality of lower electrodes and a thin film transistor array are sequentially laminated on the other side of the protective film The substrate integrally constitutes a display panel with fingerprint recognition.

According to the fingerprint recognition device described in item 2 of the scope of patent application, a color filter substrate, a plurality of upper electrodes, a liquid crystal layer, a plurality of lower electrodes and a thin film are sequentially laminated on the second side of the thin film transistor substrate The transistor array substrate integrally constitutes a display panel with fingerprint recognition.

The fingerprint recognition device according to the second item of the scope of patent application, wherein a glass substrate, a plurality of second electrodes, an organic light-emitting layer, a plurality of first electrodes and a thin film transistor array are sequentially stacked on the other side of the protective film The substrate integrally constitutes a display panel with fingerprint recognition.

According to the fingerprint recognition device described in item 2 of the scope of patent application, a glass substrate, a plurality of second electrodes, an organic light-emitting layer, a plurality of first electrodes, and a thin film transistor are sequentially laminated on the second side of the thin film transistor substrate. The crystal array substrate integrally constitutes a display panel with fingerprint recognition.

For the fingerprint identification device described in item 1 of the scope of patent application, the plurality of signal lines and the plurality of data lines are respectively electrically connected to a controller.

For example, the fingerprint recognition device described in the first item of the scope of patent application, wherein the plurality of signal lines and the plurality of data lines are respectively electrically connected to one side of at least one selector, and the other side of the at least one selector is electrically connected to a control Device.

The fingerprint identification device as described in the first item of the scope of patent application, wherein the plurality of fingerprint thin film transistor switches is an amorphous silicon thin film transistor or a low temperature polysilicon thin film transistor.

According to the fingerprint identification device described in the first item of the patent application, the thin film transistor substrate is a polymer thin film substrate, a glass substrate, a ceramic substrate or a metal substrate.