WO2020024363A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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Publication number
WO2020024363A1
WO2020024363A1 PCT/CN2018/104426 CN2018104426W WO2020024363A1 WO 2020024363 A1 WO2020024363 A1 WO 2020024363A1 CN 2018104426 W CN2018104426 W CN 2018104426W WO 2020024363 A1 WO2020024363 A1 WO 2020024363A1
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WIPO (PCT)
Prior art keywords
display
sensing
electrode
layer
signal
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PCT/CN2018/104426
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English (en)
French (fr)
Inventor
黄俊宏
黄耀立
贺兴龙
Original Assignee
武汉华星光电技术有限公司
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Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/308,560 priority Critical patent/US10755072B2/en
Publication of WO2020024363A1 publication Critical patent/WO2020024363A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels

Definitions

  • the present invention relates to the field of display technology, and in particular, to a display panel and a display device capable of implementing fingerprint recognition.
  • a common fingerprint sampling method is to set a fingerprint recognition element on a smart terminal.
  • the fingerprint recognition element that was originally set on the front bezel of a smartphone is gradually being changed to the back of the phone. Conducive to the realization of a frame display panel with narrow sides.
  • the finger needs to be placed at the position of the fingerprint recognition element to perform fingerprint recognition. Therefore, the user needs to place the finger at a specific position during authentication, which is less flexible in application.
  • the smart terminal 10 includes a display panel 110 and a fingerprint recognition unit 120.
  • the display panel 110 includes a plurality of gate lines 112 and a plurality of data lines 114.
  • the horizontal gate lines 112 and the vertical data lines 114 are staggered vertically to define a plurality of pixel units.
  • the pixel unit 116 includes a red (R, Red) pixel unit 116R, a green (G, Green) pixel unit 116G, and a blue (B, Blue) pixel unit 116B.
  • the smart terminal will set the fingerprint recognition unit 120 on the front non-display panel area, or on the back of the smart terminal 10, so that the display screen can occupy all the space on the front of the smart terminal 10 to achieve full screen display. .
  • an additional fingerprint recognition device is required, and therefore additional circuits are required to transmit the detected fingerprint data, which is not conducive to the thinning and thinning of the smart terminal.
  • the user needs to place his finger on the fingerprint recognition unit 120 to perform fingerprint verification, which causes inconvenience in use.
  • An object of the present invention is to provide a display panel and a fingerprint recognition display device. Compared with the existing smart terminals with fingerprint recognition functions, there is no need to additionally provide a space for a fingerprint recognition sensor. Can realize fingerprint recognition function. Therefore, the present invention provides a display panel and a display device that can realize fingerprint recognition, so that the display panel can achieve the function of fingerprint recognition without additional fingerprint recognition components, and users can perform fingerprint verification on the display panel without the need for Place your finger on the fingerprint reader. In this way, in addition to increasing the convenience of verification, it can also effectively reduce the components and circuits required by the smart terminal to achieve the effect of saving the components of the display board, which is helpful for the current borderless display panel and also makes the smart terminal lighter. book.
  • the invention provides a display panel including a transparent substrate, a visible light backlight source, an infrared light backlight source, a gate line, a display data line, a sensing data line, a display transistor, a display pixel electrode, a detection pixel electrode, and a sensing transistor.
  • the visible light backlight is used to emit visible light
  • the infrared light backlight is used to emit infrared light
  • the gate line is used to transmit a scanning signal
  • the display data line is used to transmit a display data signal
  • the sensing data line The display transistor is used for transmitting a sensing signal
  • the display transistor is electrically connected to the display data line and the gate line, and is used for conducting the display data signal when receiving the scan signal.
  • the display pixel electrode is electrically connected to the display transistor, and is configured to display a gray scale according to the visible light and the display data signal.
  • the detection pixel electrode is used to sense the intensity of the infrared light reflected by the transparent substrate to generate an induction signal.
  • the sensing transistor is electrically connected to the detection pixel electrode, the sensing data line, and the gate line, and is configured to conduct the sensing signal to the sensing data line when receiving the scanning signal.
  • the present invention provides a display device including a display panel, a display driving circuit, and a fingerprint recognition chip.
  • the display driving circuit is used to generate a scanning signal and a display data signal, and the display driving circuit is used to generate a sensing signal.
  • the display panel includes a transparent substrate, a visible light backlight source, an infrared light backlight source, a gate line, a display data line, a sensing data line, a display transistor, a display pixel electrode, a detection pixel electrode, and a sensing transistor.
  • the visible light backlight is used to emit visible light
  • the infrared light backlight is used to emit infrared light
  • the gate line is used to transmit the scanning signal
  • the display data line is used to transmit the display data signal
  • the The sensing data line is used to transmit the sensing signal
  • the display transistor is electrically connected to the display data line and the gate line, and is used to turn on the display data signal when receiving the scanning signal.
  • the display pixel electrode is electrically connected to the display transistor, and is configured to display a gray scale according to the visible light and the display data signal.
  • the detection pixel electrode is used to sense the intensity of the infrared light reflected by the transparent substrate to generate an induction signal.
  • the sensing transistor is electrically connected to the detection pixel electrode, the sensing data line and the gate line, and is configured to conduct the sensing signal to the sensing data line when receiving the scanning signal, And transmitting the sensing signal to the fingerprint identification chip through the sensing data line.
  • the display panel includes a buffer insulating layer, a gate insulating layer, an internal boundary electric layer, a flat layer, and an external boundary electric layer.
  • the buffer insulation layer is located on the visible light source and the infrared light source glass, and the display grid electrode and the sensing grid electrode are disposed on the buffer insulation layer.
  • the gate insulating layer is located on the buffer insulating layer, and is used to insulate the display gate electrode and the sensing gate electrode.
  • the display source electrode and the display drain electrode are disposed on the display gate electrode. Above, the sensing source electrode and the sensing drain electrode are disposed on the sensing grid electrode.
  • the flat layer is located on the inner boundary electrical layer.
  • the common electrode layer is located on the flat layer.
  • the outer boundary electrical layer is located between the passivation layer and the common electrode layer. The pixel electrode penetrates the passivation layer, the outer boundary electrical layer, the common electrode layer, and the flat layer, and is connected to the drain electrode.
  • the detection pixel electrode is composed of an infrared light-emitting material.
  • the buffer insulation layer includes a plurality of conductive light-shielding elements located between the passivation layer and the outer boundary electric layer, so as to prevent infrared rays generated by the infrared backlight source from irradiating the detection.
  • Pixel electrode located between the passivation layer and the outer boundary electric layer, so as to prevent infrared rays generated by the infrared backlight source from irradiating the detection.
  • the detection pixel electrode is electrically connected to the conductive light-shielding element through the passivation layer, and the conductive light-shielding element has an extension portion penetrating through the common electrode layer, the flat layer, and the internal boundary electric layer
  • the detection pixel electrode is connected to the detection drain electrode through the conductive light-shielding element.
  • the advantage of the present invention is that the display panel of the present invention uses the data lines for each pixel unit in the original display panel to feed back the current value detected by the detection pixel unit to the fingerprint recognition chip, so the original display panel is used.
  • the structure can achieve fingerprint identification, and the fingerprint verification function can be realized without adding an additional fingerprint reader.
  • the display panel does not need to reserve space for setting the fingerprint reader, so that the frame of the display panel can be narrowed and the thickness is thinner, which simplifies the production cost of the smart terminal.
  • users can place their fingers on the display panel. Fingerprint recognition at any location improves user experience.
  • FIG. 1 is a schematic structural diagram of a conventional display panel
  • FIG. 2 is a schematic structural diagram of a display device according to the present invention.
  • FIG. 3 is a schematic structural diagram of a display panel according to the present invention.
  • FIG. 2 is a schematic structural diagram of a display device according to the present invention.
  • the display device 20 of the present invention includes a display panel 210.
  • the display panel 210 includes a control section 220, a plurality of gate lines 212, a plurality of display data lines 214, and a plurality of sensing data lines 215.
  • the gate lines 212 are vertically interleaved with the vertical display data lines 214 and the sensing data lines 215.
  • a plurality of pixel units 216 are output.
  • the pixel unit 216 is divided into a display pixel unit and a detection pixel unit.
  • the display pixel unit includes a red pixel unit 216R, a green pixel unit 216G, and a blue pixel unit 216B.
  • the detection pixel unit 216D is used to detect The received light energy is measured, and the received light energy is converted into a current and transmitted to a sensing data line 215 connected to the detection pixel unit 216D to identify a fingerprint pressed on the display panel 210.
  • the control unit 220 includes a display driving circuit 2202 and a fingerprint recognition chip 2204.
  • the display driving circuit 2202 is used to generate a display data signal, and the display data signal is transmitted to the display pixel unit through a display data line 214.
  • the fingerprint recognition chip 2204 is used to generate a sensor.
  • the pixel units 216 can be arranged in different ways depending on display requirements and fingerprint detection requirements. In addition to the arrangement order R, G, B, and D described in this embodiment, Is it two sets of red pixel unit 216R, green pixel unit 216G, and blue pixel unit 216B with only one detection pixel unit 216D (ie, R, G, B, R, G, B, D) or every two display pixel units One detection pixel unit (ie, R, G, D, B, R, D, G, B, D) is spaced apart. Therefore, the embodiments of the present invention are only for explaining the technical idea of the present invention, but not for limiting the present invention. For example, any embodiment that can be obtained without using creative work by using the technical idea of the present invention belongs to the scope of protection of the present invention.
  • the pixel units 216 in the same row on the display panel 210 share the same gate line 212, that is, the red pixel unit 216R, the green pixel unit 216G, the blue pixel unit 216B, and the detection pixel unit 216D in the same row share the same gate line. 212.
  • the pixel units 216 in the same column on the display panel share the same data line 214 or sensing data line 215. Taking FIG. 2 in this embodiment as an example, the display colors of the pixel units 216 in the same column are the same. As shown in FIG.
  • the red pixel unit 216R, the green pixel unit 216G, and the blue pixel unit 216B in the same column are respectively connected to three display data lines 214, and the detection pixel units 216D in the same column are connected to the same sensing data line 215.
  • FIG. 3 is a schematic structural diagram of a display panel 210.
  • the display panel 210 includes a backlight layer 320, a glass substrate 321, a buffer insulating layer 322, a gate insulating layer 323, an internal dielectric layer 324, a flat layer 325, and a common substrate.
  • the electrode layer 326, the external dielectric layer 327, the passivation layer 328, the transparent substrate 329, and a black matrix (BM) are included.
  • the backlight layer 320 has a visible light backlight source 3202 for emitting visible light, and an infrared light backlight source 3204 for emitting infrared light.
  • the red pixel unit 216R is composed of a red pixel electrode 2162 and a thin film transistor TFT (ie, a display transistor), the green pixel unit 216G is composed of a green pixel electrode 2164 and a thin film transistor TFT (display transistor), and the blue pixel unit 216B is composed of one
  • the blue pixel electrode 2166 is composed of a thin film transistor TFT (display transistor)
  • the detection pixel unit 216D is composed of a detection pixel electrode 2168 and a thin film transistor TFT (sense transistor).
  • the thin film transistor TFT has a gate electrode 30, a source The electrode 32 and the drain electrode 34.
  • the red pixel electrode 2162, the green pixel electrode 2164, and the blue pixel electrode 2166 penetrate the passivation layer 328, the external dielectric layer 327, the common electrode layer 326, and the flat layer 325, and are connected to the drain electrode 34 of the display transistor.
  • the display panel 210 further includes a metal line 36 and a metal light-shielding element 302.
  • the metal line 36 is a gate line 212.
  • the metal light-shielding element 302 is used to block light generated by the backlight layer 320 and prevent visible light of the backlight layer 320 from affecting the pixel unit 216 (red The light generated by the pixel unit 216R, the green pixel unit 216G, and the blue pixel unit 216B) affects.
  • the display panel 210 may further include a conductive light-shielding element 38 and a reflective light-shielding element 304.
  • the conductive light-shielding element 38 and the reflective light-shielding element 304 are used to prevent the infrared light generated by the infrared light backlight 3204 in the backlight layer 320 from affecting the detection pixel electrode 2168.
  • the conductive light-shielding element 38 is used to transmit the current of the detection pixel electrode 2168 to the drain electrode 34 of the TFT. Specifically, the detection pixel electrode 2168 penetrates the passivation layer 328, and the conductive light shielding element 38 is located between the passivation layer 328 and the outer dielectric layer 327.
  • the width of the conductive light shielding element 38 is equivalent to the width of the detection pixel electrode 2168. Therefore, the infrared light generated by the infrared backlight 3204 can be prevented from irradiating the detection pixel electrode 2168 and affecting the detection result.
  • the conductive light-shielding element 38 has an extension portion that penetrates the external dielectric layer 327, the common electrode layer 326, and the flat layer 325 and is connected to the drain electrode 34 of the sensing transistor TFT.
  • the black matrix 330 is used to prevent the light in the backlight layer from affecting the gray levels generated by the display pixel units of the display panel 210.
  • the control unit 220 controls the level that the gate driving circuit transmits to the gate line 212 and also controls the data voltage that the display driving circuit 2202 provides to the display data line 214.
  • the control unit 220 may be composed of a display driving circuit 2202 and a fingerprint recognition chip 2204.
  • the display driving circuit 2202 is used for sequentially transmitting a high level to the gate line 212 and transmitting corresponding display data signals to the display data line 214.
  • the fingerprint recognition chip 2204 is used for transmitting a sensing signal to the detecting pixel unit 216D and reading a sensing signal returned by the sensing data line 215.
  • the control section 220 controls Gates 1 to Gate n to sequentially receive a high level while maintaining the remaining gate lines at the ground level, and then the control section 220 causes the display driving circuit 2202 to display the display voltage (display data through the corresponding data line 214) (Signal) is transmitted to the red pixel unit 216R, the green pixel unit 216G, and the blue pixel unit 216B.
  • the fingerprint recognition chip 2204 transmits a sensing signal to the detecting pixel unit 216D through the sensing data line 215.
  • the display pixel electrodes 2162, 2164, and 2166 display the corresponding gray levels according to the visible light source and the display data signal in the backlight layer 320.
  • the fingerprint recognition chip 2204 reads the sensing signal of the sensing data line 215 connected to the detection pixel unit 216D. .
  • the fingerprint recognition chip 2204 may be located in the control unit 220 or a chip that operates independently outside the control unit 220.
  • the fingerprint detection method used in the present invention mainly uses the reflected energy of the detection light to estimate the fingerprint image.
  • the light generated by the backlight 320 will be reflected back to the detection pixel by the finger.
  • the electrode 2168 because the fingerprint has a concave-convex pattern, each detection pixel unit will generate a corresponding current because of the different energy intensity of the light reflected back.
  • the backlight layer 320 can emit visible light and infrared light. The visible light is used for display.
  • the red pixel electrode 2162, the green pixel electrode 2164, and the blue pixel electrode 2166 are received according to the received
  • the data voltage and the visible light in the backlight layer 320 generate display light corresponding to the gray scale.
  • the red pixel unit 216R, the green pixel unit 216G, and the blue pixel unit 216B generate light A, B, and C.
  • the detection pixel electrode 2168 will cause the detection pixel electrode 2168 composed of light to call the material due to the reflected light D. 2168 generates a corresponding current.
  • the detection pixel electrode 2168 may be made of an infrared light-emitting material (such as single crystal silicon GaAs).
  • the current generated by the detection pixel electrode 2168 is transmitted to the sensing data line 215 connected to the detection pixel electrode 2168 through the TFT. Therefore, the current generated by the reflected light D is fed back to the fingerprint identification chip 2204 via the sensing data line 215.
  • the recess of the fingerprint will reflect more reflected light, so the current generated by the detection pixel electrode 2168 located at the recess is larger, and the current generated by the detection pixel electrode located at the projection of the fingerprint is smaller. Therefore, the concave-convex pattern of the fingerprint will cause a corresponding current to be generated by the detection pixel electrode 2168 in the display panel 210.
  • the fingerprint recognition chip 2204 then calculates a fingerprint image based on each current value obtained, and then the fingerprint recognition chip 2204 will then obtain the fingerprint image. Compare with stored data for user fingerprint verification.
  • the specific work flow of the display panel 210 of the present invention is as follows.
  • the control unit 220 sends a gate line 212 (Gate 1) of a high level to the first row, so the TFTs of all the pixel units 216 in the first row are turned on.
  • the remaining gate lines 212 receive
  • the low-level signal means that the gate lines (Gate 2 ⁇ Gate n) of the second row to the last row are at a low level, so all the 216 TFTs in the pixel units except the first row are in an off state. Therefore, preferably, the high level is 6 to 12V, and the low level is -9 to -7V.
  • the display driving circuit 2202 transmits the corresponding operating voltage to the red pixel electrode 2162, the green pixel electrode 2164, and the blue pixel electrode 2166 in the first row through different display data lines 214.
  • the fingerprint recognition chip 2204 reads the current values received by all the detection pixel electrodes 2168 in the first row, that is, reads the current of all the display data lines 214 connected to the detection pixel electrodes 2168 in the first row. value.
  • the control section 220 is composed of the display driving circuit 2202 and the fingerprint recognition chip 2204
  • the display driving circuit 2202 pairs the red pixel electrodes 2162 and green in the first row.
  • the pixel electrode 2164 and the blue pixel electrode 2166 transmit corresponding voltage signals
  • the fingerprint identification chip 2204 reads the current value (ie, the induction signal) of the sensing data line 215 connected to the first row of detecting pixel units.
  • control unit 220 outputs a high level to the gate lines 212 (Gate 2) of the second row, and outputs a low level to the gate lines 212 (Gate 1, Gate 3 ⁇ Gate n) of the other rows.
  • the TFT in the unit 216 is on, and the display driving circuit 2202 transmits the corresponding operating voltage to the corresponding red pixel unit 2162, the green pixel unit 2164, and the blue pixel unit 2166 through the data line 214.
  • control unit 220 sends high levels to the gate lines 212 in order, so that the TFTs in the pixel units 216 of the row are turned on, and then the display pixel units (red) of the row are transmitted through the corresponding display data line 214.
  • the fingerprint recognition chip 2204 estimates the fingerprint image based on the current value of the detection pixel electrode 2168 obtained in each row, and then compares it with the stored image. The verification data is compared to determine whether it is an authorized user of the smart terminal 20.
  • the present invention includes a display device 20 including the display panel 210 as described above, a display driving circuit 2202 and a fingerprint recognition chip 2204.
  • the display driving circuit 2202 is used to generate scanning signals and display data signals
  • the fingerprint recognition chip 2204 is used to generate sensing signals.
  • the display pixel units 216R, 216G, and 216B are used to generate corresponding visible light grayscale values according to the scan signals and display data signals of the display driving circuit.
  • the detection pixel unit 216D is used to return the sensing signal generated by the detection pixel electrode 2168 to the fingerprint recognition chip 2204 according to the sensing signal.
  • the fingerprint recognition chip 2204 calculates the fingerprint image after reading the feedback signal of each line. Then, the calculated fingerprint image is compared with the fingerprint in the database to perform fingerprint verification to confirm whether the user is allowed to use the application program of the smart terminal.
  • the display panel and the fingerprint identification display device of the present invention can perform fingerprint identification without further providing a fingerprint identification element, thereby performing fingerprint verification on a user.
  • the present invention utilizes gate lines, data lines, and pixel units provided in display panels and display devices in the prior art.
  • the pixel unit uses light to call materials according to the received data.
  • the light energy generates a current, and the current value is fed back to the fingerprint identification chip through the data line.
  • the user can perform fingerprint verification in the display area of the original display panel, and does not need to place his finger on the fingerprint identification element, which improves the user experience.

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Abstract

一种显示面板(210)包括透明基板(329)、可见光背光源(3202)、红外光背光源(3204)、栅极线(212)、显示数据线(214)、感测数据线(215)、显示晶体管、显示像素电极(2162,2164,2166)、侦测像素电极(2168)及感测晶体管。显示晶体管接收扫描信号时，显示像素电极(2162,2164,2166)电性连接显示晶体管，依据可见光以及显示数据信号显示灰阶。感测晶体管接收扫描信号时，导通感应信号至感测数据线(215)来感应红外光经过透明基板(329)反射后的强度以产生感应信号。利用提供的显示面板(210)，使得显示面板(210)不需额外的指纹辨识元件便可达到指纹辨识的功能，有助于实现无边框显示面板。

Description

显示面板及显示装置 技术领域
本发明涉及显示技术领域，尤其是涉及一种可实现指纹识的显示面板及显示装置。
 背景技术
随著智能终端与行动支付的迅速发展，使用智能终端付费的使用比率日益增长，为了防止智能终端的支付软件遭他人盗用，因此智能终端的使用者验证功能也越来越重要。常见的验证方式有密码验证、脸部验证以及指纹验证，其中指纹验证因所需取样的面积校小、指纹的重复率低、辨识技术简单，因此广泛应用于智能终端的使用者验证程序中。
常见的指纹取样方法，是在智能终端上设置指纹辨识元件，随著窄框触控显示面板的发展，原本设置于智能手机正面边框上指纹辨识元件，现也渐改为设置于手机背面，以利于实现具有窄边的框显示面板。当指纹辨识元件设置于背面时，手指需放置于指纹辨识元件的位置才能进行指纹辨识，因此造成使用者在验证时需将手指置于特定位置，在应用上较不灵活。
参考图1，现有技术的智能终端10的结构示意图，智能终端10包含显示面板110以及指纹辨识单元120。显示面板110中包含有数条栅极线(Gate lines)112以及数条数据线(Data lines)114，横向的栅极线112与纵向的数据线114垂直交错定义出数个像素单元(Pixel units)116，像素单元116包含有红(R, Red)像素单元116R、绿(G, Green)像素单元116G及蓝(B, Blue)像素单元116B。
 技术问题
在现有技术中的智能终端会将指纹辨识单元120设于正面非显示面板的区域，或是设置于智能终端10的背面，使得显示屏幕能占用智能终端10正面全部的空间，以实现全屏显示。但不论指纹辨识单元120设置于智能终端10的正面或背面，都需要额外设置指纹辨识器件，因此也需要额外的电路传送侦测到的指纹数据，不利于智能终端的轻薄化。同时使用者需将手指放置于指纹辨识单元120上才能进行指纹验证，造成使用的不便。
 技术解决方案
本发明的目的在于，提供一种显示面板及指纹辨识显示装置，与现有的具备指纹辨识功能的智能终端相比，不需额外设置指纹辨识传感器的空间，在显示面板的显示区域内的便可实现指纹辨识功能。因此，本发明提供一种可以实现指纹辨识的显示面板及显示装置，使得显示面板不需额外的指纹辨识元件便可达到指纹辨识的功能，使用者在显示面板上即可进行指纹验证，不需将手指置于指纹辨识器上。如此一来，除了增加验证的便利性，也能有效减少智能终端所需的元件及电路达到节省显板组成元件的效果，有助于现无边框显示面板，也能使智能终端的体积更加轻簿。
本发明提供一种显示面板包括透明基板、可见光背光源、红外光背光源、栅极线、显示数据线、感测数据线、显示晶体管、显示像素电极、侦测像素电极及感测晶体管。所述可见光背光源用来发出可见光，所述红外光背光源用来发出红外光，所述栅极线用来传送扫描信号，所述显示数据线用来传送显示数据信号，所述感测数据线用来传送感测信号，所述显示晶体管电性连接所述显示数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述显示数据信号。所述显示像素电极电性连接所述显示晶体管，用来依据所述可见光以及所述显示数据信号显示灰阶。所述侦测像素电极用来感应所述红外光经过所述透明基板反射后的强度以产生感应信号。所述感测晶体管电性连接所述侦测像素电极、所述感测数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述感应信号至感测数据线。
本发明提供一种显示装置包括显示面板、显示驱动电路以及指纹辨识芯片，所述显示驱动电路用来产生扫描信号及显示数据信号，所述显示驱动电路用来产生感测信号。所述显示面板包括透明基板、可见光背光源、红外光背光源、栅极线、显示数据线、感测数据线、显示晶体管、显示像素电极、侦测像素电极及感测晶体管。所述可见光背光源用来发出可见光，所述红外光背光源用来发出红外光，所述栅极线用来传送所述扫描信号，所述显示数据线用来传送所述显示数据信号，所述感测数据线用来传送所述感测信号，所述显示晶体管电性连接所述显示数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述显示数据信号。所述显示像素电极电性连接所述显示晶体管，用来依据所述可见光以及所述显示数据信号显示灰阶。所述侦测像素电极用来感应所述红外光经过所述透明基板反射后的强度以产生感应信号。所述感测晶体管电性连接所述侦测像素电极、所述感测数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述感应信号至感测数据线，并将所述感应信号通过所述感测数据线传送至所述指纹辨识芯片。
所述显示面板包括缓冲绝缘层、栅极绝缘层、内部界电层、平坦层以及外部界电层。所述缓冲绝缘层位于所述可见光背光源、红外光背光源玻上，所述显示栅电极及所述感测栅电极设置于所述缓冲绝缘层上。所述栅极绝缘层位于所述缓冲绝缘层上，用来绝缘数个所述显示栅电极及所述感测栅电极，所述显示源电极以及所述显示漏电极设置于所述显示栅电极上，所述感测源电极以及所述感测漏电极设置于所述感测栅电极上。所述平坦层，位于所述内部界电层上。所述共同电极层，位于所述平坦层上。所述外部界电层位于钝化层与所述共同电极层之间。所述像素电极穿透所述钝化层、所述外部界电层、所述共同电极层及所述平坦层，并与所述漏电极相连。
较佳地，所述侦测像素电极由红外光致电材料构成。
较佳地，所述缓冲绝缘层包含数个导电遮光元件，位于所述钝化层与所述外部界电层之间，用来避免所述红外线背光源所产生的红外线照射到所述侦测像素电极。
较佳地，所述侦测像素电极穿透所述钝化层与所述导电遮光元件电性连接，所述导电遮光元件具有延长部穿透所述共同电极层、平坦层及内部界电层，所述侦测像素电极通过所述导电遮光元件与所述侦测漏电极相连。
 有益效果
本发明的优点在于，本发明的显示面板，利用原本显示面板中用于各像素单元的数据线，将侦测像素单元所侦测到的电流值回馈至指纹辨识芯片，因此利用原本显示面板的结构即可达成指纹辨识，不需增加额外的指纹辨识器，即可实现指纹验证的功能。如此一来，显示面板不需预留空间用于设置指纹辨识器，使得显示面板边框能更加窄化，厚度也更加轻薄，更加简化智能终端的制作成本，同时使用者可以将手指置于显示面板上任一位置进行指纹辨识，因此提升了用户体验。
 附图说明
图1绘示现有的显示面板的结构示意图；
图2绘示本发明所述的显示装置的结构示意图；
图3绘示本发明所述的显示面板的结构示意图。
 本发明的最佳实施方式
下面结合附图对本发明提供的显示面板及显示装置做详细说明。显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图2为本发明显示装置的结构示意图。本发明的显示装置20包含显示面板210。显示面板210包含控制部220、多条栅极线212、多条显示数据线214以及多条感测数据线215，栅极线212与纵向的显示数据线214及感测数据线215垂直交错定义出数个像素单元216。在本发明的显示面板210中，像素单元216分成显示像素单元以及侦测像素单元，其中显示像素单元包括红像素单元216R、绿像素单元216G及蓝像素单元216B，侦测像素单元216D用来侦测接收到的光能量，并将接收到的光能量转换成电流传送到与侦测像素单元216D连接的感测数据线215，以识别按压于显示面板210上的指纹。控制部220中包含显示驱动电路2202以及指纹辨识芯片2204，显示驱动电路2202用来产生显示数据信号，并通过显示数据线214将显示数据信号传送到显示像素单元，指纹辨识芯片2204用来产生感测信号，并通过减测数据线215将感测信号传送至侦测像素单元。在本发明的实施例中，像素单元216可以视显示需求及指纹侦测的需求而有不同的排列方式，除了以本实施例中所述的排列序R、G、B、D外，也可以是两组红像素单元216R、绿像素单元216G及蓝像素单元216B中只间隔一个侦测像素单元216D(即R、G、B、R、G、B、D)或是每两个显示像素单元间隔一个侦测像素单元(即R、G、D、B、R、D、G、B、D)，因此本发明的实施例仅是便于阐述本发明的技术思想，而非用于限定本发明，举凡是利用本发明的技术思想，不需付出创造性劳动即可获得的实施例，都属于本发明保护的范围。
位在显示面板210上同一行的像素单元216共用同条栅极线212，即同一行的红像素单元216R、绿像素单元216G、蓝像素单元216B以及侦测像素单元216D共用同一条栅极线212。而位在显示面板上的同一列像素单元216则是共用同条数据线214或感测数据线215，以本实施例的图2为例，同一列的像素单元216的显示颜色相同，因此如图2所示，同一列红像素单元216R、绿像素单元216G、蓝像素单元216B分别连接至三条显示数据线214，同一列的侦测像素单元216D连接至同一条感测数据线215。
请参考图3，图3为显示面板210的结构示意图，显示面板210包含有背光层320、玻璃基板321、缓冲绝缘层322、栅极绝缘层323、内部介电层324、平坦层325、共同电极层326、外部介电层327、钝化层328、透明基板329、以及黑色矩阵(BM, Black Matrix) 330。背光层320中具有可见光背光源3202用来发出可见光，以及红外光背光源3204用来发出红外光。红像素单元216R由红像素电极2162与一个薄膜晶体管TFT(即显示晶体管)所组成，绿像素单元216G由一个绿像素电极2164与一个薄膜晶体管TFT(显示晶体管)所组成，蓝像素单元216B由一个蓝像素电极2166与一个薄膜晶体管TFT(显示晶体管)所组成，侦测像素单元216D由一个侦测像素电极2168与一个薄膜晶体管TFT(感测晶体管)所组成，薄膜晶体管TFT具有栅电极30、源电极32以及漏电极34。具体来说，红像素电极2162、绿像素电极2164以及蓝像素电极2166穿透钝化层328、外部介电层327、共同电极层326、平坦层325后与显示晶体管的漏电极34连接。显示面板210尚包含金属线36与金属遮光元件302，金属线36为栅极线212，金属遮光元件302用来阻挡背光层320所产生的光线，避免背光层320的可见光对像素单元216(红像素单元216R、绿像素单元216G及蓝像素单元216B)所产生的光造成影响。显示面板210还可以包含导电遮光元件38与反射遮光元件304，导电遮光元件38与反射遮光元件304用来避免背光层320中红外光背光源3204产生的红外光对侦测像素电极2168造成影响，同时导电遮光元件38用来将侦测像素电极2168的电流传送到TFT的漏电极34。具体来说，侦测像素电极2168穿透钝化层328，导电遮光元件38位于钝化层328与外部介电层327之间，导电遮光元件38的宽度与侦测像素电极2168的宽度相当，因此可以避免红外光背光源3204产生的红外光照射到侦测像素电极2168而影响侦感测结果。此外导电遮光元件38还具有一延伸部穿透外部介电层327、共同电极层326及平坦层325后与感测晶体管TFT的漏电极34连接。黑色矩阵330用来避免背光层中的光线对显示面板210的显示像素单元所产生的灰阶造成影响。
控制部220控制栅极驱动电路传送至栅极线212的电平，也控制显示驱动电路2202提供给显示数据线214的数据电压。控制部220可以是由显示驱动电路2202及指纹辨识芯片2204所组成的。显示驱动电路2202用来依序传送高电平至栅极线212，并且传送对应的显示数据信号至显示数据线214。指纹辨识芯片2204用来传送感测信号至侦测像素单元216D并读取感测数据线215所回传的感应信号。控制部220控制Gate 1至Gate n依序接收一高电平，同时使其余的栅极线维持地电平，接著控制部220使显示驱动电路2202通过相应的数据线214将显示电压(显示数据信号)传送至红像素单元216R、绿像素单元216G以及蓝像素单元216B。指纹辨识芯片2204通过感测数据线215传送感测信号至侦测像素单元216D。显示像素电极2162、2164、2166依据背光层320中的可见光背光源及显示数据信号显示对应的灰阶，指纹辨识芯片2204则读取与侦测像素单元216D相连的感测数据线215的感应信号。在本发明中，指纹辨识芯片2204可以位于控制部220中，也可以是位于控制部220外独立运作的芯片。
本发明所利用的指纹侦测方式，主要是利用侦测光的反射能量来估算指纹图像，当手指放置于显示面板210上时，背光层320所产生的光线会因为手指而反射回侦测像素电极2168，由于指纹具有凹凸纹路，因此每个侦测像素单元会因为反射回来光线能量强度不同而产生相应的电流。举例来说，如图3所示，背光层320可以发射可见光与红外光，可见光用来于显示，当TFT导通时，红像素电极2162、绿像素电极2164、蓝像素电极2166依据所接收到的数据电压以及背光层320中的可见光产生对应灰阶的显示光。红像素单元216R、绿像素单元216G及蓝像素单元216B产生光线A、B、C。而背光层中的红外光穿透透明基板329后会碰到手指纹路340而产生反射光D，侦测像素电极2168会因为反射光D而使得由光致电材料所构成的侦测像素电极2168单元2168产生对应的电流。侦测像素电极2168可以是由红外光致电材料(如单晶硅GaAs)制成，侦测像素电极2168所产生的电流会经由TFT传送到与侦测像素电极2168相连的感测数据线215，因此反射光D所产生的电流会经由感测数据线215回馈至指纹辨识芯片2204。指纹的凹处会反射较多的反射光，因此位于凹处的侦测像素电极2168所产生的电流较大，而位于指纹的凸处的侦测像素电极所产生的电流较小。因此指纹的凹凸纹路会使得显示面板210中的侦测像素电极2168产生相应的电流，指纹辨识芯片2204再根据所得到每个电流值计算出指纹图像，接著指纹辨识芯片2204再将得到的指纹图像与已存储的资料进行比对，以进行使用者指纹验证。
本发明的显示面板210具体的工作流程如下。
首先，控制部220送出一高电平至第一行的栅极线212(Gate 1)，因此第一行所有像素单元216的TFT皆为开启状态，此时其余的栅极线212接收的是低电平信号，意即第二行至最后一行的栅极线(Gate 2~Gate n)为低电平，因此除了第一行以外的所有像素单元中216的TFT皆为截止状态。因此较佳地，高电平为6~12V，低电平为-9~-7V。当第一行的栅极线212接收高电压时，显示驱动电路2202通过不同的显示数据线214将对应的工作电压传输至第一行的红像素电极2162、绿像素电极2164及蓝像素电极2166，而指纹辨识芯片2204则读取第一行中所有的侦测像素电极2168所接收到的电流值，也就是读取与所有与第一行的侦测像素电极2168相连的显示数据线214电流值。当控制部220由显示驱动电路2202与指纹辨识芯片2204构成时，第一行的像素单元216的TFT接收到高电平而开启时，显示驱动电路2202对第一行的红像素电极2162、绿像素电极2164以及蓝像素电极2166传送对应的电压信号，指纹辨识芯片2204则读取与第一行侦测像素单元相连的感测数据线215的电流值(即感应信号)。
接著控制部220对第二行的栅极线212(Gate 2)输出高电平，对其他行的栅极线212(Gate 1, Gate 3~Gate n)输出低电平，因此第二行像素单元216中的TFT为开启状态，显示驱动电路2202通过数据线214将对应的工作电压传送至对应的红像素单元2162、绿像素单元2164及蓝像素单元2166，同时指纹辨识芯片2204读取与第二行的侦测像素电极2168相连的感测数据线215电流值。
依此类推，控制部220依序对栅极线212送出高电平，使得该行的像素单元216中的TFT为开启状态，再通过对应的显示数据线214传送该行的显示像素单元(红像素单元2162、绿像素单元2164及蓝像素单元2166)所需的工作电压，并通过对应的感测数据线215读取该行的侦测像素电极2168所产生的电流值。当每一条栅极线212(Gate 1~ Gate n)皆接收高电平后，指纹辨识芯片2204再依据每行得到的侦测像素电极2168的电流值，估算出指纹图像，再与已存储的验证数据进行比对，以判断是否为被授权的智能终端20使用者。
本发明包括一种显示装置20，其包含如上所述的显示面板210，以及显示驱动电路2202与指纹辨识芯片2204。显示驱动电路2202用来产生扫描信号及显示数据信号，指纹辨识芯片2204用来产生感测信号。显示像素单元216R、216G及216B用来依据显示驱动电路的扫描信号及显示数据信号，来产生对应的可见光灰阶值。侦测像素单元216D用来依据感测信号，将侦测像素电极2168所产生的感应信号回馈至指纹辨识芯片2204，指纹辨识芯片2204在读取每一行所回馈的感应信号后，计算出指纹图像，再将计算出的指纹图像与数据库中的指纹进行比对，以进行指纹验证来确认使用者是否准许使用智慧终端的应用程序。
本发明所述的显示面板以及指纹辨识显示装置，不需另外设置指纹辨识元件，便可以进行指纹辨识，进而对使用者进行指纹验证。相较于现有技术，本发明利用现有技术中显示面板与显示装置便具备的栅极线、数据线以及像素单元，通过改过像素单元的结构，使得像素单元利用光致电材料根据所接收到的光能量产生电流，并通过数据线将电流值回馈至指纹辨识芯片。使用者在原本显示面板上的显示区域便可进行指纹验证，不需特地将手指放置于指纹辨识元件，提升了用户体验。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (11)

  1. 一种显示面板，包括：
    透明基板；
    可见光背光源，用来发出可见光；
    红外光背光源，用来发出红外光；
    栅极线，用来传送扫描信号；
    显示数据线，用来传送显示数据信号；
    感测数据线，用来传送感测信号；
    显示晶体管，电性连接所述显示数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述显示数据信号，所述显示晶体管包括显示栅电极、显示源电极以及显示漏电极；
    显示像素电极，电性连接所述显示漏电极，用来依据所述可见光以及所述显示数据信号显示灰阶；
    侦测像素电极，用来感应所述红外光经过所述透明基板反射后的强度以产生感应信号；
    感测晶体管，电性连接所述侦测像素电极、所述感测数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述感应信号至所述感测数据线，所述感测晶体管包括感测栅电极、感测源电极以及感测漏电极；
    缓冲绝缘层，位于所述可见光背光源及所述红外光背光源上，所述显示栅电极及所述感测栅电极设置于所述缓冲绝缘层上，所述缓冲绝缘层包含数个导电遮光元件，位于钝化层与外部界电层之间，用来避免所述红外线背光源所产生的红外线照射到所述侦测像素电极，所述侦测像素电极通过所述导电遮光元件与所述感测漏电极相连；
    栅极绝缘层，位于所述缓冲绝缘层上，用来绝缘数个所述显示栅电极及所述感测栅电极，所述显示源电极以及所述显示漏电极设置于所述显示栅电极上，所述感测源电极以及所述感测漏电极设置于所述感测栅电极上；
    内部界电层，用来绝缘数个所述显示源电极、所述显示漏电极、所述感测源电极以及所述感测漏电极。
  2. 一种显示面板，包括：
    透明基板；
    可见光背光源，用来发出可见光；
    红外光背光源，用来发出红外光；
    栅极线，用来传送扫描信号；
    显示数据线，用来传送显示数据信号；
    感测数据线，用来传送感测信号；
    显示晶体管，电性连接所述显示数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述显示数据信号；
    显示像素电极，电性连接所述显示晶体管，用来依据所述可见光以及所述显示数据信号显示灰阶；
    侦测像素电极，用来感应所述红外光经过所述透明基板反射后的强度以产生感应信号；及
    感测晶体管，电性连接所述侦测像素电极、所述感测数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述感应信号至所述感测数据线。
  3. 如权利要求2所述的显示面板，其中，所述显示晶体管包括显示栅电极、显示源电极以及显示漏电极，所述感测晶体管包括感测栅电极、感测源电极以及感测漏电极，所述显示面板包括：
    缓冲绝缘层，位于所述可见光背光源及所述红外光背光源上，所述显示栅电极及所述感测栅电极设置于所述缓冲绝缘层上；
    栅极绝缘层，位于所述缓冲绝缘层上，用来绝缘数个所述显示栅电极及所述感测栅电极，所述显示源电极以及所述显示漏电极设置于所述显示栅电极上，所述感测源电极以及所述感测漏电极设置于所述感测栅电极上；
    内部界电层，用来绝缘数个所述显示源电极、所述显示漏电极、所述感测源电极以及所述感测漏电极；
    平坦层，位于所述内部界电层上；
    共同电极层，位于所述平坦层上；以及
    外部界电层，位于钝化层与所述共同电极层之间；
    所述显示像素电极穿透所述钝化层、所述外部界电层、所述共同电极层及所述平坦层，与所述显示漏电极相连。
  4. 如权利要求2所述的显示面板，其中，所述侦测像素电极由红外光致电材料构成。
  5. 如权利要求3所述的显示面板，其中，所述缓冲绝缘层包含数个导电遮光元件，位于所述钝化层与所述外部界电层之间，用来避免所述红外线背光源所产生的红外线照射到所述侦测像素电极。
  6. 如权利要求3所述的显示面板，其中，所述侦测像素电极穿透所述钝化层与所述导电遮光元件电性连接，所述导电遮光元件具有延长部穿透所述共同电极层、平坦层及内部界电层，所述侦测像素电极通过所述导电遮光元件与所述感测漏电极相连。
  7. 一种显示装置，包括：
    显示驱动电路，用来产生扫描信号及显示数据信号；
    辨识芯片用来产生感测信号；
    显示面板，所述显示面板包括：
    透明基板；
    可见光背光源，用来发出可见光；
    红外光背光源，用来发出红外光；
    栅极线，用来传送所述扫描信号；
    显示数据线，用来传送所述显示数据信号；
    感测数据线，用来传送所述感测信号；
    显示晶体管，电性连接所述显示数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述显示数据信号；
    显示像素电极，电性连接所述显示晶体管，用来依据所述可见光以及所述显示数据信号显示灰阶；
    侦测像素电极，用来感应所述红外光经过所述透明基板反射后的强度以产生感应信号；及
    感测晶体管，电性连接所述侦测像素电极、所述感测数据线以及所述栅极线，用来于接收所述扫描信号时，导通所述感测信号至感测数据线，并将所述感应信号通过所述感测数据线传送至所述辨识芯片；及
    辨识芯片，用来依据感应信号，识别接触于所述显示面板的物件影像。
  8. 如权利要求7所述的显示装置，其中，所述显示晶体管包括显示栅电极、显示源电极以及显示漏电极，所述感测晶体管包括感测栅电极、感测源电极以及感测漏电极，所述显示面板包括：
    缓冲绝缘层，位于所述可见光背光源及所述红外光背光源，所述显示栅电极及所述感测栅电极设置于所述缓冲绝缘层上；
    栅极绝缘层，位于所述缓冲绝缘层上，用来绝缘数个所述显示栅电极及所述感测栅电极，所述显示源电极以及所述显示漏电极设置于所述显示栅电极上，所述感测源电极以及所述感测漏电极设置于所述感测栅电极上；
    内部界电层，用来绝缘数个所述显示源电极、所述显示漏电极、所述感测源电极以及所述感测漏电极；
    平坦层，位于所述内部界电层上；
    共同电极层，位于所述平坦层上；以及
    外部界电层，位于钝化层与所述共同电极层之间；
    所述显示像素电极穿透所述钝化层、所述外部界电层、所述共同电极层及所述平坦层，与所述显示漏电极相连。
  9. 如权利要求7所述的显示装置，其中，所述侦测像素电极由红外光致电材料构成。
  10. 如权利要求8所述的显示装置，其中，所述缓冲绝缘层包含数个导电遮光元件，位于所述钝化层与所述外部界电层之间，用来避免所述红外线背光源所产生的红外线照射到所述侦测像素电极。
  11. 如权利要求8所述的显示装置，其中，所述侦测像素电极穿透所述钝化层与所述导电遮光元件电性连接，所述导电遮光元件具有延长部穿透所述共同电极层、平坦层及内部界电层，所述侦测像素电极通过所述导电遮光元件与所述感测漏电极相连。
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