TWI636393B - In-display optical fingerprint identification display device - Google Patents
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Abstract
本揭露提出一種內嵌式光學指紋辨識顯示裝置，其包括至少一光源、一導光板、一薄膜電晶體層、及一觸控感應與共用電極層。導光板導引至少一光源的光線方向。薄膜電晶體層位於該導光板之一側，其具有複數個畫素電路、複數個感光電路、複數條掃描線及複數條資料線，複數條掃描線及複數條資料線係依據第一、第二方向設置。觸控感應與共用電極層位於薄膜電晶體層之背對該導光板之一側，其具有複數個透明感應電極區塊，複數個透明感應電極區塊係依據第一及第二方向設置，其中，該複數個感光電路接收該至少一光源的反射光，以產生一光學指紋影像。The present disclosure provides an in-cell optical fingerprint recognition display device including at least one light source, a light guide plate, a thin film transistor layer, and a touch sensing and common electrode layer. The light guide plate guides the direction of the light of the at least one light source. The thin film transistor layer is located on one side of the light guide plate, and has a plurality of pixel circuits, a plurality of photosensitive circuits, a plurality of scanning lines and a plurality of data lines, the plurality of scanning lines and the plurality of data lines are based on the first and the Two directions setting. The touch sensing and common electrode layer is located on one side of the thin film transistor layer opposite to the light guide plate, and has a plurality of transparent sensing electrode blocks, wherein the plurality of transparent sensing electrode blocks are disposed according to the first and second directions, wherein The plurality of photosensitive circuits receive the reflected light of the at least one light source to generate an optical fingerprint image.
Description
本揭露係關於指紋辨識之技術領域，尤指一種內嵌式光學指紋辨識顯示裝置。The disclosure relates to the technical field of fingerprint identification, and more particularly to an in-line optical fingerprint identification display device.
手機市場的競爭日趨激烈。因此許多功能已加入手機設計中，例如觸控偵測、指紋辨識等功能。同時為了降低手機的厚度及減少組裝程序，現行手機主要使用內嵌式觸控技術(in-cell touch detection technology)。圖1係一習知手機100之示意圖。如圖所示，其具有一指紋辨識模組110及一觸控螢幕120。由於在手機正面放置了指紋辨識模組110，而使手機的觸控螢幕120所能顯示的區域變小。The competition in the mobile phone market is becoming increasingly fierce. Therefore, many functions have been added to the design of mobile phones, such as touch detection and fingerprint recognition. At the same time, in order to reduce the thickness of the mobile phone and reduce the assembly process, the current mobile phone mainly uses in-cell touch detection technology. FIG. 1 is a schematic diagram of a conventional mobile phone 100. As shown, it has a fingerprint recognition module 110 and a touch screen 120. Since the fingerprint recognition module 110 is placed on the front side of the mobile phone, the area that the touch screen 120 of the mobile phone can display is reduced.
在手機設計中，為顯示更多資訊，手機顯示螢幕均朝向高屏佔比。同時為了在手機正面放置指紋辨識系統或相機，觸控螢幕120需要進行異型切割來放置相關的元件。圖2係另一習知手機200之示意圖。為了容置指紋辨識模組110，會對手機顯示螢幕220進行異型切割，以在顯示螢幕220挖空一塊區域，如圖2中的橢圓虛線所示。然而對顯示螢幕220進行異型切割時，需對顯示螢幕的相關元件(例如基板、導光板、薄膜電晶體層、…、保護玻璃等)進行異型切割，此增加許多加工程序，同時也增加組裝的困難度，進而使成本大幅提高。因此，習知內嵌式光學指紋辨識顯示裝置實仍有改善的空間。In the mobile phone design, in order to display more information, the mobile phone display screens are all facing the high screen. At the same time, in order to place a fingerprint recognition system or a camera on the front of the mobile phone, the touch screen 120 needs to be shaped to place the relevant components. 2 is a schematic diagram of another conventional mobile phone 200. In order to accommodate the fingerprint recognition module 110, the mobile phone display screen 220 is profiled to hollow out an area on the display screen 220, as indicated by the elliptical dotted line in FIG. However, when the display screen 220 is profiled, it is necessary to perform profile cutting on the relevant components of the display screen (such as a substrate, a light guide plate, a thin film transistor layer, ..., a protective glass, etc.), which increases many processing procedures and also increases assembly. The difficulty, and thus the cost, is greatly increased. Therefore, there is still room for improvement in the conventional in-cell optical fingerprint recognition display device.
本揭露之目的主要係在提供一種內嵌式光學指紋辨識顯示裝置，其係在液晶顯示裝置的辨識顯示裝置薄膜電晶體層設置複數個感光電路，以進行指紋辨識操作，可讓同一面板具有顯示、觸碰偵測、及指紋辨識三種功能。由於面板不需要異型切割，面板良率與成本可以再次降低。同時不需要額外再準備指紋辨識元件，可以降低成本與簡化物料控管。且因不需要異型切割即可將指紋辨識功能整合入面板內，所以手機設計上不需開孔，可以增加防水性。The purpose of the disclosure is mainly to provide an in-line optical fingerprint identification display device, which is provided with a plurality of photosensitive circuits in a thin film transistor layer of a liquid crystal display device for performing fingerprint identification operation, so that the same panel can be displayed. , touch detection, and fingerprint recognition. Since the panel does not require profile cutting, panel yield and cost can be reduced again. At the same time, there is no need to prepare additional fingerprint identification components, which can reduce costs and simplify material control. And the fingerprint recognition function can be integrated into the panel because no special shape cutting is required, so the mobile phone design does not need to be opened, and the waterproofness can be increased.
依據本揭露之一特色，本揭露提出一種內嵌式光學指紋辨識顯示裝置，其包括至少一光源、一導光板、一薄膜電晶體層、及一觸控感應與共用電極層。該導光板導引該至少一光源的光線方向。該薄膜電晶體層位於該導光板之一側，其具有複數個畫素電路、複數個感光電路、複數條掃描線及複數條資料線，該複數條掃描線係依據一第一方向設置，該複數條資料線係依據一第二方向設置。該觸控感應與共用電極層位於該薄膜電晶體層之背對該導光板之一側，其具有複數個透明感應電極區塊，該複數個透明感應電極區塊係依據該第一方向及該第二方向設置，其中，該複數個感光電路接收該至少一光源的反射光，以產生一光學指紋影像。According to one of the features of the present disclosure, the present disclosure provides an in-cell optical fingerprint recognition display device including at least one light source, a light guide plate, a thin film transistor layer, and a touch sensing and common electrode layer. The light guide plate guides a light direction of the at least one light source. The thin film transistor layer is located on one side of the light guide plate, and has a plurality of pixel circuits, a plurality of photosensitive circuits, a plurality of scanning lines, and a plurality of data lines, wherein the plurality of scanning lines are disposed according to a first direction, The plurality of data lines are set according to a second direction. The touch sensing and common electrode layer is located on a side of the thin film transistor layer opposite to the light guide plate, and has a plurality of transparent sensing electrode blocks, and the plurality of transparent sensing electrode blocks are according to the first direction and the The second direction is set, wherein the plurality of photosensitive circuits receive the reflected light of the at least one light source to generate an optical fingerprint image.
為了使本揭露的目的、技術方案及優點更加清楚明白，以下結合附圖及實施例，對本揭露進行進一步詳細說明。應當理解，此處所描述的具體實施例僅僅用以解釋本揭露，並不用於限定本揭露。The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.
圖3係本揭露之內嵌式光學指紋辨識顯示裝置300之剖面示意圖。該內嵌式光學指紋辨識顯示裝置300包括一支撐層(Bezel)305、一反射板(Reflector)310、至少一光源315、一導光板(Light Guide Plate)320、一擴散板(Diffuser)325、一背面增亮膜(Rear Bright Enhancement Film，RBEF)330、一前面增亮膜(Front Bright Enhancement Film，FBEF)335、一下偏光層340、一薄膜電晶體層345、一顯示材料層350、一觸控感應與共用電極層355、一彩色濾光層(Color Filter，CF)360、一遮光層(Black Matrix，BM)365、一蓋板370、及一光準直器(Collimator)375。3 is a cross-sectional view of the in-cell optical fingerprint recognition display device 300 of the present disclosure. The in-cell optical fingerprint display device 300 includes a support layer (Bezel) 305, a reflector 310, at least one light source 315, a light guide plate 320, and a diffuser plate 325. a rear brightness enhancement film (RBEF) 330, a front brightness enhancement film (FBEF) 335, a lower polarizing layer 340, a thin film transistor layer 345, a display material layer 350, a touch The sensing and sharing electrode layer 355, a color filter (CF) 360, a black matrix (BM) 365, a cover 370, and a collimator 375 are controlled.
該至少一光源315位於該導光板320的一側邊，以提供照光。該導光板320導引該至少一光源315的光線方向。The at least one light source 315 is located at one side of the light guide plate 320 to provide illumination. The light guide plate 320 guides the light direction of the at least one light source 315.
該反射板310位於支撐層305上、且位於該導光板320之背對於該薄膜電晶體層345之一側，以將該導光板320漏出的光反射回該導光板320中，防止該至少一光源315的光外漏。該擴散板325位於該導光板320之面對於該薄膜電晶體層345之一側，以將該導光板320輸出之光形成一均勻的面光源。The reflector 310 is located on the support layer 305 and is located on the side of the light guide plate 320 opposite to the thin film transistor layer 345. The light leaked from the light guide plate 320 is reflected back into the light guide plate 320 to prevent the at least one. Light leakage from the light source 315. The diffuser plate 325 is located on one side of the light guide plate 320 for one side of the thin film transistor layer 345 to form a uniform surface light source for the light outputted by the light guide plate 320.
該背面增亮膜330位於該擴散板325之面對於該薄膜電晶體層345之一側，以增亮該擴散板325輸出之面光源。該前面增亮膜335位於該背面增亮膜330之面對於該薄膜電晶體層345之一側，以增亮該擴散板325輸出之面光源。The back surface brightness enhancement film 330 is located on the side of the diffusion plate 325 on one side of the thin film transistor layer 345 to brighten the surface light source output from the diffusion plate 325. The front brightness enhancement film 335 is located on the side of the back brightness enhancement film 330 on one side of the thin film transistor layer 345 to brighten the surface light source output from the diffusion plate 325.
該下偏光層340位於該前面增亮膜335之面對於該薄膜電晶體層345之一側，以將該前面增亮膜335輸出之非極化面光源轉變為極化面光源。The lower polarizing layer 340 is located on the side of the front brightness enhancing film 335 on one side of the thin film transistor layer 345 to convert the non-polarized surface light source output from the front brightness enhancing film 335 into a polarization surface light source.
該薄膜電晶體層345位於該導光板320之一側，其具有複數個畫素電路、複數個感光電路、複數條掃描線及複數條資料線(顯示於圖4)。該複數個感光電路接收該至少一光源315的反射光，以產生一光學指紋影像。The thin film transistor layer 345 is located on one side of the light guide plate 320, and has a plurality of pixel circuits, a plurality of photosensitive circuits, a plurality of scanning lines, and a plurality of data lines (shown in FIG. 4). The plurality of photosensitive circuits receive the reflected light of the at least one light source 315 to generate an optical fingerprint image.
該顯示材料層350位於該薄膜電晶體層345之背對於該導光板320之一側。該顯示材料層350之材料可為液晶。The display material layer 350 is located on one side of the thin film transistor layer 345 opposite to the light guide plate 320. The material of the display material layer 350 may be a liquid crystal.
該觸控感應與共用電極層355位於該薄膜電晶體層345之背對該導光板320之一側，其具有複數個觸控感應電極區塊3551，該複數個觸控感應電極區塊3551係依據該第一方向及該第二方向設置。其中以觸控感應電極區塊3551可以是透明或接近透明材質，且可來進行觸控偵測。The touch sensing and common electrode layer 355 is located on one side of the thin film transistor layer 345 opposite to the light guide plate 320, and has a plurality of touch sensing electrode blocks 3551, and the plurality of touch sensing electrode blocks 3551 are According to the first direction and the second direction. The touch sensing electrode block 3551 can be transparent or nearly transparent, and can be used for touch detection.
該遮光層365位於該蓋板370之面對於薄膜電晶體層345之一側，該遮光層365具有多數條遮光線3651。該多數條遮光線3651係以矩陣方式排列，此為熟悉液晶顯示裝置技術之人員所已知，故不再詳述。該彩色濾光層360位於該遮光層365的多數條遮光線3651之間及多數條遮光線3651的表面。The light shielding layer 365 is located on one side of the cover plate 370 on one side of the thin film transistor layer 345, and the light shielding layer 365 has a plurality of light shielding lines 3651. The plurality of shading lines 3651 are arranged in a matrix, which is known to those skilled in the art of liquid crystal display devices and will not be described in detail. The color filter layer 360 is located between the plurality of light-shielding lines 3651 of the light-shielding layer 365 and the surface of the plurality of light-shielding lines 3651.
該光準直器375位於複數個感光電路之背對於該導光板320之一側的相對應處，以協助該反射光的前進達到平行直進。該光準直器375係位於該反射光到達複數個感光電路的光路徑上。該光準直器(Collimator)可位於薄膜電晶體層345、遮光層(BM)365、彩色濾光層(CF)360、或顯示材料層350。The light collimator 375 is located at a side of the plurality of photosensitive circuits facing away from one side of the light guide plate 320 to assist the advancement of the reflected light to be parallel straight. The light collimator 375 is located on the optical path of the reflected light reaching a plurality of photosensitive circuits. The collimator may be located in the thin film transistor layer 345, the light shielding layer (BM) 365, the color filter layer (CF) 360, or the display material layer 350.
該內嵌式光學指紋辨識顯示裝置300更包含一指紋與掃描驅動電路410及一顯示、觸控與光學指紋控制電路420，及薄膜電晶體層345，如圖4所示。該薄膜電晶體層345具有複數個畫素電路430、複數個感光電路440、複數條掃描線450及複數條資料線460，該複數條掃描線450係依據一第一方向(Y軸方向)設置，該複數條資料線460係依據一第二方向設置(X軸方向)設置。The in-line optical fingerprint recognition display device 300 further includes a fingerprint and scan driving circuit 410 and a display, touch and optical fingerprint control circuit 420, and a thin film transistor layer 345, as shown in FIG. The thin film transistor layer 345 has a plurality of pixel circuits 430, a plurality of photosensitive circuits 440, a plurality of scanning lines 450, and a plurality of data lines 460. The plurality of scanning lines 450 are arranged according to a first direction (Y-axis direction). The plurality of data lines 460 are set according to a second direction setting (X-axis direction).
每一條掃描線450及每一條資料線460交接處設置有一個畫素電路430或是一個感光電路440。其中，每一個畫素電路430包含一個薄膜電晶體431及一個電容433，每一個感光電路440包含一個薄膜電晶體441、一個電容443及一個感光二極體445。A pixel circuit 430 or a light sensing circuit 440 is disposed at the intersection of each of the scan lines 450 and each of the data lines 460. Each of the pixel circuits 430 includes a thin film transistor 431 and a capacitor 433. Each of the photoreceptor circuits 440 includes a thin film transistor 441, a capacitor 443, and a photodiode 445.
如圖4所示，掃描線451連接至複數個薄膜電晶體431，係用以進行單純顯示操作。掃描線453連接至複數個薄膜電晶體431及複數個薄膜電晶體441，則係用以進行顯示操作及指紋辨識操作。As shown in FIG. 4, the scan line 451 is connected to a plurality of thin film transistors 431 for performing a simple display operation. The scan line 453 is connected to a plurality of thin film transistors 431 and a plurality of thin film transistors 441 for performing display operations and fingerprint recognition operations.
該指紋與掃描驅動電路410連接至該複數條掃描線450，以依序或隨機開啟該複數條掃描線450中一條掃描線所對應之畫素電路430或感光電路440。該顯示、觸控與光學指紋控制電路420連接至該指紋與掃描驅動電路410及該複數條資料線460。如圖4所示，感光電路440和畫素電路430一同製作，因此感光電路440可設置在顯示區域內。The fingerprint and scan driving circuit 410 is connected to the plurality of scanning lines 450 to sequentially or randomly turn on the pixel circuit 430 or the photosensitive circuit 440 corresponding to one of the plurality of scanning lines 450. The display, touch and optical fingerprint control circuit 420 is coupled to the fingerprint and scan drive circuit 410 and the plurality of data lines 460. As shown in FIG. 4, the photosensitive circuit 440 is fabricated together with the pixel circuit 430, so that the photosensitive circuit 440 can be disposed in the display area.
圖5係本揭露之顯示、觸控與光學指紋控制電路420之方塊圖。如圖5所示，該顯示、觸控與光學指紋控制電路包含420包含一多工單元510、一顯示驅動單520、一光學指紋驅動與感應單元530、一共用電極與觸控感應單元540、及一控制單元550。5 is a block diagram of the display, touch and optical fingerprint control circuit 420 of the present disclosure. As shown in FIG. 5, the display, touch and optical fingerprint control circuit 420 includes a multiplex unit 510, a display driving unit 520, an optical fingerprint driving and sensing unit 530, a common electrode and touch sensing unit 540, And a control unit 550.
該多工單元510具有複數個多工器511，每一多工器511具有一第一端a、一第二端b、及一第三端c，該第一端a連接至該複數條資料線中的一條對應資料線460。該顯示驅動單元520連接至每一多工器511之第二端b，以將顯示資料經由該多工單元510及該複數條資料線460而寫入至對應的畫素電路430。The multiplex unit 510 has a plurality of multiplexers 511. Each multiplexer 511 has a first end a, a second end b, and a third end c. The first end a is connected to the plurality of data. One of the lines corresponds to the data line 460. The display driving unit 520 is connected to the second end b of each multiplexer 511 to write the display data to the corresponding pixel circuit 430 via the multiplex unit 510 and the plurality of data lines 460.
該光學指紋驅動與感應單元530連接至每一多工器511之第三端c，以將一初始電壓Vini經由該多工單元510及該複數條資料線460而寫入至對應的感光電路440、或經由該多工單元510及該複數條資料線460而讀入對應的感光電路440之一感應電壓。The optical fingerprint driving and sensing unit 530 is connected to the third end c of each multiplexer 511 to write an initial voltage Vini to the corresponding photosensitive circuit 440 via the multiplexing unit 510 and the plurality of data lines 460. Or inducing a voltage of one of the corresponding photosensitive circuits 440 via the multiplex unit 510 and the plurality of data lines 460.
該共用電極與觸控感應單元540連接至該觸控感應與共用電極層355的複數個透明感應電極區塊3551，以使該複數個透明感應電極區塊3551進行例如是自電容(self-capacitance)式觸碰偵測、或使該複數個觸控感應電極區塊3551提供一共同電壓Vcom以進行顯示操作。The common electrode and the touch sensing unit 540 are connected to the plurality of transparent sensing electrode blocks 3551 of the touch sensing and common electrode layer 355, so that the plurality of transparent sensing electrode blocks 3551 are, for example, self-capacitance. Touch detection, or the plurality of touch sensing electrode blocks 3551 provide a common voltage Vcom for display operation.
藉由切割該觸控感應與共用電極層355，可形成該複數個觸控感應電極區塊3551，並利用該複數個觸控感應電極區塊3551進行例如是自電容(self-capacitance)式觸碰偵測，或是於顯示操作時，對該複數個透明感應電極區塊3551施加一共同電壓，以讓該複數個觸控感應電極區塊3551形成一共同電壓層，此係熟知該技術者基於本揭露之內容所能完成，不予贅述。The plurality of touch sensing electrode blocks 3551 can be formed by cutting the touch sensing and common electrode layer 355, and the self-capacitance touch is performed by using the plurality of touch sensing electrode blocks 3551. When the touch detection or the display operation, a common voltage is applied to the plurality of transparent sensing electrode blocks 3551, so that the plurality of touch sensing electrode blocks 3551 form a common voltage layer, which is well known to the skilled person. It can be completed based on the contents of the disclosure, and will not be described.
該控制單元550連接至該多工單元510、該顯示驅動單元520、該光學指紋驅動與感應單元530、該共用電極與觸控感應單元540、及該指紋與掃描驅動電路410，以提供一顯示操作、一觸碰偵測操作、或一指紋辨識操作之相關時序及控制訊號。The control unit 550 is connected to the multiplex unit 510, the display driving unit 520, the optical fingerprint driving and sensing unit 530, the common electrode and touch sensing unit 540, and the fingerprint and scan driving circuit 410 to provide a display. Operation, one touch detection operation, or a timing and control signal for a fingerprint identification operation.
該光學指紋驅動與感應單元530包含一指紋感測訊號偵測電路531，用以偵測該感光電路440所感測之指紋感測訊號。圖6係本揭露之感光電路440、多工器511、及指紋感測訊號偵測電路531之示意圖。The optical fingerprint driving and sensing unit 530 includes a fingerprint sensing signal detecting circuit 531 for detecting the fingerprint sensing signal sensed by the photosensitive circuit 440. FIG. 6 is a schematic diagram of the photosensitive circuit 440, the multiplexer 511, and the fingerprint sensing signal detecting circuit 531 of the present disclosure.
指紋感測訊號偵測電路531包含一開關610、一電容620、及一運算放大器630。該開關610的一端連接至該多工器511的第二端b、該電容620的一端、及該運算放大器630的反相輸入端(-)。該開關610的另一端連接至該電容620的另一端、及該運算放大器630的輸出端。該開關610的一控制端連接至一重置訊號Reset，該重置訊號Reset係由該控制單元550所產生。該運算放大器630的非反相輸入端(+)連接至一參考電壓Vref。薄膜電晶體441的閘極連接至一掃描訊號Scan，該掃描訊號Scan係由該指紋與掃描驅動電路410所產生。The fingerprint sensing signal detecting circuit 531 includes a switch 610, a capacitor 620, and an operational amplifier 630. One end of the switch 610 is connected to the second end b of the multiplexer 511, one end of the capacitor 620, and an inverting input terminal (-) of the operational amplifier 630. The other end of the switch 610 is coupled to the other end of the capacitor 620 and to the output of the operational amplifier 630. A control terminal of the switch 610 is coupled to a reset signal Reset generated by the control unit 550. The non-inverting input (+) of the operational amplifier 630 is coupled to a reference voltage Vref. The gate of the thin film transistor 441 is connected to a scan signal Scan which is generated by the fingerprint and the scan driving circuit 410.
圖7係本揭露之感光電路440、多工器511、及指紋感測訊號偵測電路531之時序示意圖。於圖7中，實線的電壓Vc代表該感光電路440上沒有手指時，該電容443的電壓。虛線的電壓Vc代表該感光電路440上有手指時，該電容443的電壓。利用該感光電路440進行指紋影像偵測係熟知該技術者基於本揭露之內容所能完成，不予贅述。FIG. 7 is a timing diagram of the photosensitive circuit 440, the multiplexer 511, and the fingerprint sensing signal detecting circuit 531 of the present disclosure. In FIG. 7, the voltage Vc of the solid line represents the voltage of the capacitor 443 when there is no finger on the photosensitive circuit 440. The dotted voltage Vc represents the voltage of the capacitor 443 when there is a finger on the photosensitive circuit 440. The use of the photosensitive circuit 440 for fingerprint image detection is well known to those skilled in the art based on the disclosure of the present disclosure, and will not be described again.
圖8係本揭露之薄膜電晶體層345、指紋與掃描驅動電路410、及顯示、觸控與光學指紋控制電路420的另一實施例示意圖。該薄膜電晶體層345具有複數個畫素電路430、複數個感光電路440、複數條掃描線450、複數條資料線460、及複數條指紋資料線810，該複數條掃描線450係依據該第一方向(Y軸方向)設置，該複數條資料線460係依據該第二方向(X軸方向)設置，該複數條指紋資料線810係依據該第二方向(X軸方向)設置。FIG. 8 is a schematic diagram of another embodiment of the thin film transistor layer 345, the fingerprint and scan driving circuit 410, and the display, touch and optical fingerprint control circuit 420 of the present disclosure. The thin film transistor layer 345 has a plurality of pixel circuits 430, a plurality of photosensitive circuits 440, a plurality of scanning lines 450, a plurality of data lines 460, and a plurality of fingerprint data lines 810. The plurality of scanning lines 450 are based on the first In one direction (Y-axis direction), the plurality of data lines 460 are disposed according to the second direction (X-axis direction), and the plurality of fingerprint data lines 810 are disposed according to the second direction (X-axis direction).
如圖8所示，該複數條掃描線450的每一條掃描線及該複數條資料線460的每一條資料線交接處設置有一個畫素電路430，該每一條掃描線450及該複數條指紋資料線810的每一條指紋資料線交接處設置有一個感光電路440。As shown in FIG. 8, a pixel circuit 430 is disposed at each of the scan lines of the plurality of scan lines 450 and each of the plurality of data lines 460, and each of the scan lines 450 and the plurality of fingerprints A photosensitive circuit 440 is disposed at each of the fingerprint data line intersections of the data lines 810.
亦即，於圖4的實施例中，該感光電路440與該畫素電路430共用掃描線450及資料線460，而於圖8的實施例中，該感光電路440僅與該畫素電路430共用掃描線453，該感光電路440使用獨立的指紋資料線810。That is, in the embodiment of FIG. 4, the photosensitive circuit 440 shares the scan line 450 and the data line 460 with the pixel circuit 430. In the embodiment of FIG. 8, the photosensitive circuit 440 is only associated with the pixel circuit 430. A scan line 453 is shared, which uses a separate fingerprint data line 810.
圖9係本揭露圖8之顯示、觸控與光學指紋控制電路420之方塊圖。與圖5相較，由於該感光電路440使用獨立的指紋資料線810，故於圖9中，該顯示、觸控與光學指紋控制電路420包含該顯示驅動單520、該光學指紋驅動與感應單元530、該共用電極與觸控感應單元540、及該控制單元550。FIG. 9 is a block diagram of the display, touch and optical fingerprint control circuit 420 of FIG. Compared with FIG. 5, since the photosensitive circuit 440 uses a separate fingerprint data line 810, the display, touch and optical fingerprint control circuit 420 includes the display driving unit 520, and the optical fingerprint driving and sensing unit. 530. The common electrode and touch sensing unit 540 and the control unit 550.
圖10係本揭露之薄膜電晶體層345、指紋與掃描驅動電路410、及顯示、觸控與光學指紋控制電路420的又一實施例示意圖。該薄膜電晶體層345具有複數個畫素電路430、複數個感光電路440、複數條掃描線450、複數條資料線460、複數條指紋掃描線1010及複數條指紋資料線1020。該複數條掃描線450係依據該第一方向(Y軸方向)設置，該複數條資料線460係依據該第二方向(X軸方向)設置。複數條指紋掃描線1010係依據該第一方向(Y軸方向)設置，該複數條指紋資料線1020係依據該第二方向(X軸方向)設置。10 is a schematic diagram of still another embodiment of the thin film transistor layer 345, the fingerprint and scan driving circuit 410, and the display, touch and optical fingerprint control circuit 420 of the present disclosure. The thin film transistor layer 345 has a plurality of pixel circuits 430, a plurality of photosensitive circuits 440, a plurality of scanning lines 450, a plurality of data lines 460, a plurality of fingerprint scanning lines 1010, and a plurality of fingerprint data lines 1020. The plurality of scanning lines 450 are disposed according to the first direction (Y-axis direction), and the plurality of data lines 460 are disposed according to the second direction (X-axis direction). The plurality of fingerprint scanning lines 1010 are arranged according to the first direction (Y-axis direction), and the plurality of fingerprint data lines 1020 are set according to the second direction (X-axis direction).
如圖10所示，該複數條掃描線450的每一條掃描線及該複數條資料線460的每一條資料線交接處設置有一個畫素電路430，複數條指紋掃描線1010的每一條掃描線及該複數條指紋資料線1020的每一條指紋資料線交接處設置有一個感光電路440。As shown in FIG. 10, a pixel circuit 430 is disposed at each of the scan lines of the plurality of scan lines 450 and each of the plurality of data lines 460, and each scan line of the plurality of fingerprint scan lines 1010 is provided. And a photosensitive circuit 440 is disposed at each of the fingerprint data lines of the plurality of fingerprint data lines 1020.
亦即，於圖8的實施例中，該感光電路440與該畫素電路430共用掃描線450，該感光電路440使用獨立的資料線810。於圖10的實施例中，該感光電路440該感光電路440使用獨立的指紋掃描線1010及指紋資料線1020。且為方便佈線，圖10實施例中的指紋與掃描驅動電路可分為一指紋驅動電路1040及一掃描驅動電路1030。That is, in the embodiment of FIG. 8, the photosensitive circuit 440 shares the scan line 450 with the pixel circuit 430, and the photosensitive circuit 440 uses a separate data line 810. In the embodiment of FIG. 10, the photosensitive circuit 440 uses the separate fingerprint scan line 1010 and the fingerprint data line 1020. For convenience of wiring, the fingerprint and scan driving circuit in the embodiment of FIG. 10 can be divided into a fingerprint driving circuit 1040 and a scan driving circuit 1030.
該觸碰偵測操作的優先權係高於該顯示操作的優先權及該指紋辨識操作的優先權，該顯示操作的優先權與該指紋辨識操作的優先權係為相同。圖11係本揭露圖10對應之時序圖。其中，如圖所示，於時段T1進行顯示操作，該掃描驅動電路1030依序輸出開啟訊號至掃描線450，以開啟掃描線450對應的薄膜電晶體431，俾將一影像訊號寫入電容433。於時段T2進行觸碰偵測操作，由於該觸碰偵測操作的優先權高於該顯示操作的優先權，因此先暫停顯示操作，並進行觸碰偵測操作。於時段T3、T5、T4、T6亦是如此。於時段T7先進行指紋辨識操作，當執行完指紋辨識操作後再執行顯示操作。該指紋驅動電路1040輸出開啟訊號至指紋掃描線1010，以開啟指紋掃描線1010對應的薄膜電晶體441，俾將初始電壓寫入電容443，或讀取電容443上的感應電壓。The priority of the touch detection operation is higher than the priority of the display operation and the priority of the fingerprint recognition operation, and the priority of the display operation is the same as the priority of the fingerprint recognition operation. FIG. 11 is a timing chart corresponding to FIG. 10 . As shown in the figure, the display operation is performed in the period T1. The scan driving circuit 1030 sequentially outputs an enable signal to the scan line 450 to turn on the thin film transistor 431 corresponding to the scan line 450, and writes an image signal to the capacitor 433. . The touch detection operation is performed in the time period T2. Since the priority of the touch detection operation is higher than the priority of the display operation, the display operation is paused first, and the touch detection operation is performed. The same is true for the time periods T3, T5, T4, and T6. The fingerprint identification operation is performed first in the time period T7, and the display operation is performed after the fingerprint identification operation is performed. The fingerprint driving circuit 1040 outputs an opening signal to the fingerprint scanning line 1010 to turn on the thin film transistor 441 corresponding to the fingerprint scanning line 1010, and writes the initial voltage to the capacitor 443 or the induced voltage on the capacitor 443.
圖12係本揭露導光板320的一示意圖。如圖12所示，其係顯示該內嵌式光學指紋辨識顯示裝置300於線段BB’處的剖面圖。該至少一光源315位於該導光板320的一側邊。該導光板320導引並改變該至少一光源315的光線方向，以提供該內嵌式光學指紋辨識顯示裝置辨識顯示裝置300的照光。FIG. 12 is a schematic diagram of the light guide plate 320 of the present disclosure. As shown in Fig. 12, it shows a cross-sectional view of the in-line optical fingerprint recognition display device 300 at line segment BB'. The at least one light source 315 is located at one side of the light guide plate 320. The light guide plate 320 guides and changes the direction of the light of the at least one light source 315 to provide illumination of the display device 300 by the inline optical fingerprint recognition display device.
光源315可以是冷陰極螢光管(CCFL)光源、熱陰極螢光管光源、或發光二極體(LED)光源，以提供該內嵌式光學指紋辨識顯示裝置辨識顯示裝置300的照光。同時也提供該感光電路440的照光。亦即該至少一光源315照到一手指時，會產生一反射光，該感光電路440接收該至少一光源315的反射光，以產生一光學指紋影像。The light source 315 can be a cold cathode fluorescent tube (CCFL) light source, a hot cathode fluorescent tube light source, or a light emitting diode (LED) light source to provide illumination of the inline optical fingerprint recognition display device identification display device 300. Illumination of the photosensitive circuit 440 is also provided. That is, when the at least one light source 315 shines on a finger, a reflected light is generated, and the photosensitive circuit 440 receives the reflected light of the at least one light source 315 to generate an optical fingerprint image.
在進行指紋辨識操作時，若手指有髒污或是油脂時，可見光容易被吸收，故該感光電路440得到的光學指紋影像往往殘缺不齊。因此，可使用可見光波長以外的光源，以獲得較佳的光學指紋影像。於一實施例中，光源更包括紅外線光源317，俾獲得較佳的光學指紋影像。When the fingerprint recognition operation is performed, if the finger is dirty or grease, the visible light is easily absorbed, and thus the optical fingerprint image obtained by the photosensitive circuit 440 is often defective. Therefore, a light source other than the visible light wavelength can be used to obtain a better optical fingerprint image. In one embodiment, the light source further includes an infrared light source 317 to obtain a better optical fingerprint image.
光準直器375係位於該反射光到達該複數個感光電路440的光路徑上，以協助該反射光的前進達到平行直進，俾避免該反射光傳播時發散，導致光能量損失。圖13係本揭露之光準直器375之一示意圖。如圖13所示，該光準直器375係包含具有聚光微結構1311之一偏光片1310，以讓反射光可平行直進到達該複數個感光電路440。The light collimator 375 is located on the light path of the reflected light reaching the plurality of photosensitive circuits 440 to assist the advancement of the reflected light to achieve parallel straightening, and to avoid divergence when the reflected light propagates, resulting in loss of optical energy. Figure 13 is a schematic illustration of one of the light collimators 375 of the present disclosure. As shown in FIG. 13, the light collimator 375 includes a polarizer 1310 having a concentrating microstructure 1311 to allow the reflected light to pass parallel to the plurality of photosensitive circuits 440.
圖14係本揭露之光準直器375之另一示意圖。如圖14所示，該光準直器375係位於該遮光層(BM)365，該遮光層365係位於蓋板370之面對於薄膜電晶體層345之一側，該遮光層365係由多數條遮光線3651所構成，該光準直器375與該多數條遮光線3651使用相同光罩製成。Figure 14 is another schematic illustration of the light collimator 375 of the present disclosure. As shown in FIG. 14, the light collimator 375 is located on the light shielding layer (BM) 365, and the light shielding layer 365 is located on one side of the cover plate 370 for one side of the thin film transistor layer 345. The light shielding line 3651 is formed, and the light collimator 375 is made of the same light mask as the plurality of light shielding lines 3651.
圖15係本揭露之光準直器375之又一示意圖。如圖15所示，該光準直器375係位於一彩色濾光層(CF)360中，該光準直器375與該彩色濾光層360可使用相同製程製作，亦即利用RGB色阻相關設計，進行該光準直器375設計。15 is another schematic diagram of the light collimator 375 of the present disclosure. As shown in FIG. 15, the light collimator 375 is disposed in a color filter layer (CF) 360. The light collimator 375 and the color filter layer 360 can be fabricated using the same process, that is, using RGB color resistance. The design of the light collimator 375 is performed in accordance with the design.
圖16係本揭露之光準直器375之再一示意圖。如圖16所示，該光準直器375係為由位於該複數個感光電路440相對應處的複數個液晶畫素所構成。亦即，利用該複數個感光電路440上方的液晶之旋轉角度，以讓反射光可平行直進到達該複數個感光電路440，而達到光準直器的功能。Figure 16 is a further schematic view of the light collimator 375 of the present disclosure. As shown in FIG. 16, the optical collimator 375 is composed of a plurality of liquid crystal pixels located corresponding to the plurality of photosensitive circuits 440. That is, the rotation angle of the liquid crystal above the plurality of photosensitive circuits 440 is utilized to allow the reflected light to go straight in parallel to the plurality of photosensitive circuits 440 to achieve the function of the optical collimator.
於圖4、圖8及圖10中，該薄膜電晶體層345中的區域A僅設置該複數個感光電路440，此僅為方便說明。由於感光電路440的尺寸係小於畫素電路430的尺寸，於其他實施例中，區域A亦可同時設置感光電路440及畫素電路430。In FIG. 4, FIG. 8 and FIG. 10, the region A in the thin film transistor layer 345 is provided with only the plurality of photosensitive circuits 440, which is merely for convenience of explanation. Since the size of the photosensitive circuit 440 is smaller than the size of the pixel circuit 430, in other embodiments, the area A can also be provided with the photosensitive circuit 440 and the pixel circuit 430 at the same time.
圖17係本揭露內嵌式光學指紋辨識顯示裝置300之使用示意圖。其係利用內嵌式光學指紋辨識顯示裝置300的觸碰功能來喚醒光學指紋辨識功能。亦即，只有當手指觸碰在有感光電路440區域(例如區域A)時，光學指紋辨識功能才會開始運作。當手指觸碰在沒有感光電路440區域(非區域A)時，光學指紋辨識功能並不會運作。光學指紋辨識功能在被正確換醒後，該至少一光源315才會開啟，以避免不必要的功率損失。在本發明中感光電路可搭配畫素電路的製程一同製備，因此，可將光學指紋功能嵌入顯示區域內，也可提高屏佔比。FIG. 17 is a schematic diagram of the use of the in-cell optical fingerprint recognition display device 300. It uses the touch function of the in-line optical fingerprint recognition display device 300 to wake up the optical fingerprint recognition function. That is, the optical fingerprint recognition function will only start when the finger touches the area of the photosensitive circuit 440 (for example, the area A). The optical fingerprinting function does not work when the finger touches the area without the photosensitive circuit 440 (non-area A). After the optical fingerprint recognition function is properly awake, the at least one light source 315 is turned on to avoid unnecessary power loss. In the present invention, the photosensitive circuit can be prepared together with the process of the pixel circuit, so that the optical fingerprint function can be embedded in the display area, and the screen ratio can be increased.
於本揭露中，其在該薄膜電晶體層345設置複數個感光電路440，以進行指紋辨識操作，可讓同一LCD面板具有顯示、觸碰偵測、及指紋辨識三種功能。由於面板不需要異型切割，面板良率與成本可以再次降低。同時不需要額外再準備指紋辨識元件，可以降低成本與簡化物料控管。且因不需要異型切割即可將指紋辨識功能整合入LCD面板內，所以不需額外對構件進行開孔工序，可以增加終端產品，例如手機的防水性。In the disclosure, a plurality of photosensitive circuits 440 are disposed on the thin film transistor layer 345 for fingerprint identification operation, so that the same LCD panel has three functions of display, touch detection, and fingerprint recognition. Since the panel does not require profile cutting, panel yield and cost can be reduced again. At the same time, there is no need to prepare additional fingerprint identification components, which can reduce costs and simplify material control. Moreover, since the fingerprint recognition function can be integrated into the LCD panel without the need for profile cutting, it is not necessary to additionally open the component, and the terminal product, such as the waterproofness of the mobile phone, can be increased.
於前述例子中，各個區域的選取範圍僅是作為說明使用，非用於限制本案之權利範圍。該領域之相關技術人員，可依據本揭露之揭露而變更各個區域的選取範圍。In the foregoing examples, the selection of each region is for illustrative purposes only and is not intended to limit the scope of the invention. A person skilled in the art can change the selection range of each area according to the disclosure of the disclosure.
上述實施例僅係為了方便說明而舉例而已，本揭露所主張之權利範圍自應以申請專利範圍所述為準，而非僅限於上述實施例。The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.
100‧‧‧手機100‧‧‧Mobile phones
110‧‧‧指紋辨識模組110‧‧‧Fingerprint Identification Module
120‧‧‧觸控螢幕120‧‧‧ touch screen
200‧‧‧手機200‧‧‧Mobile phones
220‧‧‧手機顯示螢幕220‧‧‧Mobile display screen
300‧‧‧內嵌式光學指紋辨識顯示裝置300‧‧‧Inline optical fingerprint identification display device
305‧‧‧支撐層305‧‧‧Support layer
310‧‧‧反射板310‧‧‧reflector
315‧‧‧光源315‧‧‧Light source
320‧‧‧導光板320‧‧‧Light guide plate
325‧‧‧擴散板325‧‧‧Diffuser
330‧‧‧背面增亮膜330‧‧‧Back brightness film
335‧‧‧前面增亮膜335‧‧‧ Front brightening film
340‧‧‧下偏光層340‧‧‧low polarizing layer
345‧‧‧薄膜電晶體層345‧‧‧thin film layer
350‧‧‧顯示材料層350‧‧‧Display material layer
355‧‧‧觸控感應與共用電極層355‧‧‧Touch sensing and common electrode layer
360‧‧‧彩色濾光層360‧‧‧Color filter layer
365‧‧‧遮光層365‧‧‧ shading layer
370‧‧‧蓋板370‧‧‧ cover
375‧‧‧光準直器375‧‧‧Light collimator
3651‧‧‧遮光線3651‧‧‧ shading line
3551‧‧‧感應電極區塊3551‧‧‧Induction electrode block
440‧‧‧感光電路440‧‧‧Photosensitive circuit
410‧‧‧指紋與掃描驅動電路410‧‧‧Fingerprint and scan drive circuit
420‧‧‧顯示、觸控與光學指紋控制電路420‧‧‧Display, touch and optical fingerprint control circuits
430‧‧‧畫素電路430‧‧‧ pixel circuit
450, 451, 453‧‧‧掃描線450, 451, 453‧‧‧ scan lines
460‧‧‧資料線460‧‧‧ data line
431,441‧‧‧薄膜電晶體431,441‧‧‧film transistor
433,443‧‧‧電容433,443‧‧‧ capacitor
445‧‧‧感光二極體445‧‧‧Photosensitive diode
510‧‧‧多工單元510‧‧‧Multiple units
520‧‧‧顯示驅動單520‧‧‧Display driver list
530‧‧‧光學指紋驅動與感應單元530‧‧‧Optical fingerprint drive and sensing unit
540‧‧‧共用電極與觸控感應單元540‧‧‧Common electrode and touch sensing unit
550‧‧‧控制單元550‧‧‧Control unit
511‧‧‧多工器511‧‧‧Multiplexer
a‧‧‧第一端A‧‧‧first end
b‧‧‧第二端B‧‧‧second end
c‧‧‧第三端C‧‧‧third end
Vini‧‧‧初始電壓Vini‧‧‧ initial voltage
Vcom‧‧‧共同電壓Vcom‧‧‧Common voltage
531‧‧‧指紋感測訊號偵測電路531‧‧‧Fingerprint sensing signal detection circuit
610‧‧‧開關610‧‧‧Switch
620‧‧‧電容620‧‧‧ Capacitance
630‧‧‧運算放大器630‧‧‧Operational Amplifier
Reset‧‧‧重置訊號Reset‧‧‧Reset signal
Scan‧‧‧掃描訊號Scan‧‧‧ scan signal
Vc‧‧‧電容443的電壓Vc‧‧‧voltage of capacitor 443
810‧‧‧指紋資料線810‧‧‧Finger data line
1010‧‧‧指紋掃描線1010‧‧‧Fingerprint scanning line
1020‧‧‧指紋資料線1020‧‧‧Finger data line
1040‧‧‧指紋驅動電路1040‧‧‧Fingerprint driver circuit
1030‧‧‧掃描驅動電路1030‧‧‧Scan drive circuit
T1~T7‧‧‧時段T1~T7‧‧‧
BB’‧‧‧線段BB’‧‧‧ segment
1310‧‧‧偏光片1310‧‧‧ polarizer
1311‧‧‧聚光微結構1311‧‧‧ Concentrating microstructure
A‧‧‧區域A‧‧‧ area
圖1係一習知手機之示意圖。 圖2係另一習知手機之示意圖。 圖3係本揭露之內嵌式光學指紋辨識顯示裝置之剖面示意圖。 圖4係本揭露之薄膜電晶體層、指紋與掃描驅動電路、及顯示、觸控與光學指紋控制電路的一實施例示意圖。 圖5係本揭露之顯示、觸控與光學指紋控制電路之方塊圖。 圖6係本揭露之感光電路、多工器、及指紋感測訊號偵測電路之示意圖。 圖7係本揭露之感光電路、多工器、及指紋感測訊號偵測電路之時序示意圖。 圖8係本揭露之薄膜電晶體層、指紋與掃描驅動電路、及顯示、觸控與光學指紋控制電路的另一實施例示意圖。 圖9係本揭露圖8之顯示、觸控與光學指紋控制電路之方塊圖。 圖10係本揭露之薄膜電晶體層、指紋與掃描驅動電路及顯示、觸控與光學指紋控制電路的又一實施例示意圖。 圖11係本揭露圖10對應之時序圖。 圖12係本揭露導光板的一示意圖。 圖13係本揭露之光準直器之一示意圖。 圖14係本揭露之光準直器之另一示意圖。 圖15係本揭露之光準直器之又一示意圖。 圖16係本揭露之光準直器之再一示意圖。 圖17係本揭露內嵌式光學指紋辨識顯示裝置之使用示意圖。Figure 1 is a schematic diagram of a conventional mobile phone. 2 is a schematic diagram of another conventional mobile phone. 3 is a schematic cross-sectional view of the in-cell optical fingerprint identification display device of the present disclosure. 4 is a schematic diagram of an embodiment of a thin film transistor layer, a fingerprint and a scan driving circuit, and a display, touch and optical fingerprint control circuit of the present disclosure. 5 is a block diagram of the display, touch and optical fingerprint control circuitry of the present disclosure. 6 is a schematic diagram of a photosensitive circuit, a multiplexer, and a fingerprint sensing signal detecting circuit of the present disclosure. FIG. 7 is a timing diagram of the photosensitive circuit, the multiplexer, and the fingerprint sensing signal detecting circuit of the present disclosure. 8 is a schematic diagram of another embodiment of a thin film transistor layer, a fingerprint and a scan driving circuit, and a display, touch and optical fingerprint control circuit of the present disclosure. 9 is a block diagram of the display, touch and optical fingerprint control circuit of FIG. 8 . 10 is a schematic diagram of still another embodiment of the thin film transistor layer, the fingerprint and scan driving circuit, and the display, touch and optical fingerprint control circuit of the present disclosure. FIG. 11 is a timing chart corresponding to FIG. 10 . Figure 12 is a schematic view of the light guide plate of the present invention. Figure 13 is a schematic illustration of one of the light collimators of the present disclosure. Figure 14 is another schematic view of the light collimator of the present disclosure. Figure 15 is another schematic view of the light collimator of the present disclosure. Figure 16 is a further schematic view of the light collimator of the present disclosure. Figure 17 is a schematic view showing the use of the in-cell optical fingerprint identification display device.
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