WO2018130110A1 - 触控基板及显示装置 - Google Patents

触控基板及显示装置 Download PDF

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Publication number
WO2018130110A1
WO2018130110A1 PCT/CN2018/071164 CN2018071164W WO2018130110A1 WO 2018130110 A1 WO2018130110 A1 WO 2018130110A1 CN 2018071164 W CN2018071164 W CN 2018071164W WO 2018130110 A1 WO2018130110 A1 WO 2018130110A1
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WIPO (PCT)
Prior art keywords
touch
transistor
read
electrode
unit
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PCT/CN2018/071164
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English (en)
French (fr)
Inventor
李昌峰
王海生
刘英明
丁小梁
许睿
赵利军
卢鹏程
刘伟
韩艳玲
顾品超
秦云科
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京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/081,182 priority Critical patent/US10627940B2/en
Publication of WO2018130110A1 publication Critical patent/WO2018130110A1/zh

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    • 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/047—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors

Definitions

  • the present disclosure relates to the field of display technologies, and in particular to a touch substrate and a display device.
  • Touch screen has become the main human-computer interaction means for personal mobile communication devices and integrated information terminals (such as tablet PCs, smart phones) and super laptops due to its advantages of easy operation, intuitiveness and flexibility.
  • OLED displays As a high-end consumer product, are one of the hotspots in the field of flat panel display research. Compared with liquid crystal displays (LCDs), OLED displays have the advantages of low power consumption, low production cost, self-illumination, wide viewing angle and fast response, so they are widely used in mobile phones, PDAs, digital cameras, etc. Has begun to replace the traditional liquid crystal display.
  • an OLED display device structure for example, a light-emitting unit
  • a touch function device for example, a touch unit
  • the anterior projection of the OLED display device and the touch function device on the substrate does not substantially overlap.
  • an increased touch function device causes a decrease in the aperture ratio of the OLED display and limits the resolution of the OLED display.
  • the present disclosure is directed to an improved touch substrate and display device that is capable of at least partially alleviating or eliminating the above mentioned problems.
  • a touch substrate includes: a substrate, and a touch unit and a light emitting unit sequentially disposed on the substrate, wherein the touch unit and the light emitting unit are on the substrate
  • the orthographic projections on at least partially overlap.
  • the number of the touch units is plural, each of the touch units includes a read transistor and a light sensing device, and a first pole of the read transistor is connected to the photosensitive device The second electrode of the read transistor is connected to the read signal line, and the control electrode of the read transistor is connected to the drive signal line.
  • the photosensitive device includes a second electrode, a photosensitive layer, and a first electrode, which are sequentially disposed on the substrate, wherein the touch substrate further includes an insulating layer, and the insulating layer is disposed on the On the first electrode of the photosensitive device, the first electrode of the read transistor is connected to the first electrode of the photosensitive device through a via penetrating through the insulating layer.
  • a plurality of the touch units are arranged in an array.
  • the control electrodes of the read transistors of the touch cells in the same row are connected to the same drive signal line, and the second electrodes of the read transistors of the touch cells in the same column are connected to the same read signal line.
  • the touch substrate further includes a plurality of gate lines and a plurality of data lines that are disposed across and insulated from each other, and a plurality of pixel driving units disposed at regions defined by the intersection positions.
  • Each of the pixel driving units is connected to a corresponding gate line, a data line, and a light emitting unit, and outputs a data signal input on the data line to the light emitting unit under the control of a control signal input by the gate line. To drive the light unit to emit light.
  • the pixel driving unit is located between the light emitting unit and the photosensitive device.
  • the pixel driving unit includes a switching transistor and a driving transistor, the switching transistor and the driving transistor respectively including a first pole, a second pole, and a control pole, a control pole of the switching transistor, and the a control electrode of the driving transistor is in the same layer as a control electrode of the read transistor, a first pole, a second pole of the switching transistor, and a first pole, a second pole of the driving transistor, and a first The one pole and the second pole are in the same layer, and an active layer of the switching transistor and an active layer of the driving transistor are in the same layer as an active layer of the read transistor.
  • the data line is disposed in the same layer as the read signal line, and the gate line is disposed in the same layer as the drive signal line.
  • the light emitting unit is an organic electroluminescent diode.
  • a display device including any of the above touch substrates is provided.
  • a method of fabricating a touch substrate includes: providing a substrate; providing a touch unit on the substrate; and providing a light emitting unit above the touch unit.
  • the touch unit and the orthographic projection of the light emitting unit on the substrate at least partially overlap.
  • providing a touch unit on a substrate includes: providing a read transistor and a light sensing device, wherein a first pole of the read transistor is connected to the light sensing device, and a second pole of the read transistor is connected to read A signal line is taken, and a control electrode of the read transistor is connected to the drive signal line.
  • providing the photosensitive device includes sequentially disposing a second electrode, a photosensitive layer, and a first electrode on the substrate.
  • the method further includes: providing an insulating layer on the first electrode of the photosensitive device; providing a via hole penetrating the insulating layer in the insulating layer to connect the second electrode of the read transistor and the The first electrode of the photosensitive device.
  • the above method further includes providing a pixel driving unit between the light emitting unit and the photosensitive device, the pixel driving unit including a switching transistor and a driving transistor, wherein the same process step is formed a gate of the switching transistor, a gate of the driving transistor, and a gate of the read transistor.
  • the first pole and the second pole of the switching transistor, the first pole and the second pole of the driving transistor, and the first pole and the second pole of the read transistor are formed in the same process step.
  • An active layer of the switching transistor, an active layer of the driving transistor, and an active layer of the read transistor are formed in the same process step.
  • the above method further includes: providing a plurality of gate lines and a plurality of data lines that are cross-arranged and insulated from each other; and providing a plurality of driving signal lines and a plurality of reading signal lines.
  • Each of the touch units is arranged in an array, and the control electrodes of the read transistors of the touch units in the same row are connected to the same drive signal line, and the second poles of the read transistors of the touch units in the same column are connected to the same read a signal line, and the data line and the read signal line are formed in the same process step, and the gate line and the drive signal line are formed in the same process step.
  • FIG. 1 is a schematic structural view of a touch substrate according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a schematic view showing the arrangement of a touch unit in a touch substrate according to Embodiment 2 of the present disclosure
  • FIG 3 is a schematic diagram of a circuit in a pixel region in the touch substrate of the disclosed embodiment 2.
  • An embodiment of the present disclosure provides a touch substrate, as shown in FIG. 1 , comprising: a substrate 10 , a touch unit and a light emitting unit disposed on the substrate 10 in sequence, and the touch unit and the light emitting unit are on the substrate 10 .
  • the orthographic projections at least partially overlap.
  • the light emitting unit may be, for example, an organic light emitting diode (OLED) device as shown in FIG. 1, which includes an anode 31, a cathode 32, and a luminescent material 33 disposed between the anode 31 and the cathode 32.
  • OLED organic light emitting diode
  • the touch unit may include, for example, the read transistor 2 and the photosensitive device 1.
  • the photosensitive device 1 includes a first electrode 11, a second electrode 12, and a photosensitive layer 13 disposed between the first electrode 11 and the second electrode 12.
  • the photosensitive layer 13 may include a PIN junction or an organic photosensitive material or the like.
  • the photosensitive device 1 and the read transistor 2 in each touch unit are sequentially disposed in a direction away from the substrate 10, and an insulating layer 4 is disposed between the photosensitive device 1 and the read transistor 2. .
  • the second pole 21 of the read transistor 2 is connected to the first electrode 11 of the photosensitive device 1 through a via penetrating through the insulating layer 4.
  • the disclosure is described by taking the light emitting unit as the OLED, the touch unit including the read transistor and the photosensitive device as an example, but as known to those skilled in the art, the light is emitted.
  • the unit and the touch unit can adopt other structures.
  • the touch unit is periodically disposed within the display area of the display panel, that is, the area where the light emitting unit is located.
  • One touch unit can correspond to a plurality of light emitting units arranged in a matrix without one-to-one correspondence with the light emitting units.
  • the arrangement of the touch unit can be set by a person skilled in the art according to actual needs in order to achieve the required touch precision.
  • the arrangement of the lighting units can also be set by a person skilled in the art according to actual needs in order to achieve the required display resolution.
  • the touch substrate When the touch substrate is applied to the display panel, the light emitted by the light emitting unit is reflected by the user's finger and returned to the touch unit, and the touch unit determines the user's finger touch according to the strength of the received light. The location for the touch function.
  • the light emitting unit is located above the touch unit, that is, when the touch substrate is prepared, it is different from the conventional technology of preparing the light emitting unit and then preparing the touch unit.
  • the touch unit can be prepared first, and then the light emitting unit is prepared. Therefore, the orthographic projection of the touch unit and the light emitting unit on the substrate can overlap without affecting the display function of the touch substrate, and thus the touch substrate can be improved. Open aperture and resolution.
  • the touch substrate includes a plurality of gate lines and a plurality of data lines that are crossed and insulated from each other.
  • Each of the intersection positions of the plurality of gate lines and the plurality of data lines defines one pixel area, and the pixel driving unit and the light emitting unit are disposed in each of the pixel areas.
  • Each of the pixel driving units is connected to a corresponding gate line, a data line, and a light emitting unit, and outputs a data voltage input on the data line to the light emitting unit under the control of a control signal input by the gate line To drive the light unit to emit light.
  • the touch substrate further includes a touch unit located between the substrate and the light emitting unit. As shown in FIG. 2, the touch units are arranged in an array, and each touch unit includes a photosensitive device 1 and a read transistor 2, and is connected to a corresponding drive signal line 4 and read signal line 5.
  • the photosensitive device 1 is configured to sense the intensity of light emitted by the light emitting unit and reflected back by the user's finger, and convert the optical signal into an electrical signal.
  • the reading transistor 2 is turned on, so that an electric signal generated by the photosensitive device 1 is transmitted to the reading signal line 5 through the reading transistor 2.
  • the drive signal line 4 is scanned progressively, and the read signal line 5 is sequentially read.
  • the Nth row driving signal line 4 is scanned, if the data read by the Mth column read signal line 5 is high due to the influence of the reflected light of the finger, it can be determined that the driving signal line 4 in the Nth row is determined.
  • the touch is received at the intersection of the read signal line 5 of the Mth column. Touch detection of the entire touch screen can be realized by scanning all the driving signal lines 4 row by row and sequentially reading all the reading signal lines 5.
  • the term "effective signal” refers to an electrical signal that is capable of turning a read transistor on. For example, if the read transistor is a P-type transistor, the active signal is a low level signal; if the read transistor is an N-type transistor, the active signal is a high level signal.
  • Figure 3 illustrates a schematic diagram of a pixel drive unit.
  • the pixel driving unit includes a driving transistor M2, a switching transistor M1, and a storage capacitor C1.
  • the gate of the switching transistor M1 is connected to the gate line Gate
  • the first electrode is connected to the data line Data
  • the second electrode is connected to the gate of the driving transistor M2.
  • the first electrode of the driving transistor M2 is connected to the first power supply terminal VDD
  • the second electrode is connected to the anode of the light emitting unit OLED.
  • the cathode of the light emitting unit OLED is connected to the second power supply terminal VSS.
  • the first end of the storage capacitor C1 is connected between the second electrode of the switching transistor M1 and the control electrode of the driving transistor M2, and the second end is connected between the first electrode of the driving transistor M2 and the first power supply terminal VDD.
  • the control electrodes of the switching transistors M1 in the pixel driving units in the same row are connected to the same gate line Gate, and the first poles of the switching transistors M1 in the same column of pixel driving units are connected One data line Data, and the second electrode of each switching transistor M1 is connected to the control electrode of its corresponding driving transistor M2.
  • the pixel driving unit including the 2T1C pixel circuit as an example, but this does not constitute a limitation of the pixel driving unit.
  • the pixel driving unit may be a 6T2C, 4T2C pixel circuit or the like, which will not be described in detail herein.
  • the switching transistor M1 and the driving transistor M2 in the pixel driving unit are disposed in the same layer as the reading transistor 2 in the touch unit.
  • the control electrode of the switching transistor M1 and the control electrode of the driving transistor M2 are in the same layer as the control electrode of the reading transistor 2, and the first and second poles of the switching transistor M1 and the first and second poles of the driving transistor M2
  • the first layer and the second electrode of the read transistor 2 are in the same layer
  • the active layer of the switching transistor M1 and the active layer of the driving transistor M2 are in the same layer as the active layer of the read transistor 2.
  • the thickness of the touch substrate can be significantly reduced, which is advantageous for thinning and thinning of the display device.
  • the switching transistor M1 and the driving transistor M2 in the pixel driving unit and the reading transistor 2 in the touch unit can be prepared in one preparation process, thereby increasing productivity and reducing production cost.
  • the data line Data may be disposed in the same layer as the read signal line 5, for example, the data line Data may be disposed in parallel with the read signal line in the column direction.
  • the gate line Gate may be disposed in the same layer as the driving signal line 4.
  • the gate line Gate may be disposed in parallel with the driving signal line 4 in the row direction.
  • a display device including any of the above touch substrates is provided.
  • the light emitting unit is located above the touch unit, that is, when the touch substrate is prepared, unlike the conventional technology of preparing the light emitting unit and then preparing the touch unit,
  • the touch unit can be prepared first, and then the light emitting unit is prepared. Therefore, the orthographic projection of the touch unit and the light emitting unit on the substrate can overlap without affecting the display function of the touch substrate, and thus the opening of the touch substrate can be improved. Rate and resolution.
  • the display device may be any product or component having a display function, such as an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a method of fabricating a touch substrate includes: providing a substrate; providing a touch unit on the substrate; and providing a light emitting unit above the touch unit.
  • the touch unit and the orthographic projection of the light emitting unit on the substrate at least partially overlap.
  • the touch unit may be prepared first, and then the light-emitting unit is prepared, so that the touch unit and the light-emitting unit are on the substrate.
  • the orthographic projections on the top can overlap without affecting the display function of the touch substrate, and thus the aperture ratio and resolution of the touch substrate can be improved.
  • providing the touch unit on the substrate may include: providing a read transistor and a photosensitive device, wherein the first pole of the read transistor is connected to the photosensitive device, and the second pole of the read transistor is connected to read a signal line, and a control electrode of the read transistor is coupled to the drive signal line.
  • providing the photosensitive device may include sequentially disposing a second electrode, a photosensitive layer, and a first electrode on the substrate.
  • the method further includes: providing an insulating layer on the first electrode of the photosensitive device; and providing a via hole penetrating the insulating layer in the insulating layer to connect the second pole of the read transistor And a first electrode of the photosensitive device.
  • the above method may further include providing a pixel driving unit between the light emitting unit and the photosensitive device, the pixel driving unit including a switching transistor and a driving transistor, wherein the same process step is formed A switching transistor, the driving transistor, and the read transistor.
  • the gate electrode of the switching transistor, the gate electrode of the driving transistor, and the gate electrode of the read transistor are formed in the same process step, and the first pole of the switching transistor is formed in the same process step.
  • the thickness of the touch substrate can be significantly reduced, thereby facilitating the thinning and thinning of the display device, increasing the productivity, and reducing the production cost.
  • the above method may further include: providing a plurality of gate lines and a plurality of data lines that are cross-arranged and insulated from each other; and providing a plurality of driving signal lines and a plurality of read signal lines.
  • Each of the touch units is arranged in an array, and the control electrodes of the read transistors of the touch units in the same row are connected to the same drive signal line, and the second poles of the read transistors of the touch units in the same column are connected to the same read a signal line, and the data line and the read signal line are formed in the same process step, and the gate line and the drive signal line are formed in the same process step.
  • the fabrication process can be significantly simplified, and the production cost can be reduced.

Abstract

一种触控基板及显示装置，触控基板包括：基底（10），依次设置在基底（10）上的触控单元和发光单元，触控单元与发光单元在基底（10）上的正投影至少部分重叠。增加了显示装置的开口率和分辨率。

Description

触控基板及显示装置
相关申请的交叉引用
本申请要求享有2017年1月10日提交的中国专利申请No.201710015676.1的优先权，其全部公开内容通过引用并入本文。
技术领域
本公开涉及显示技术领域，并且具体地涉及一种触控基板及显示装置。
背景技术
触摸屏因具有易操作性、直观性和灵活性等优点，已成为个人移动通讯设备和综合信息终端(如平板电脑、智能手机)以及超级笔记本电脑等的主要人机交互手段。
另一方面，有机发光二极管(Organic Light Emitting Diode；OLED)显示器作为一种高档消费类产品，是当今平板显示器研究领域的热点之一。与液晶显示器(Liquid Crystal Display；LCD)相比，OLED显示器具有低能耗、生产成本低、自发光、宽视角及响应速度快等优点，因而目前广泛应用在手机、PDA、数码相机等领域，并且已经开始取代传统的液晶显示器。
本发明人发现，在现有的OLED显示器中，通常首先制作OLED显示器件结构(例如发光单元)，然后再分离地制作触控功能器件(例如触控单元)。为了不影响正常显示，OLED显示器件与触控功能器件在基底上的正投影基本无交叠。然而，在这样的OLED显示器中，增加的触控功能器件会导致OLED显示器的开口率的下降，并且对OLED显示器的分辨率造成限制。
发明内容
本公开旨在提供一种改进的触控基板及显示装置，其能够至少部分地缓解或消除以上提到的问题。
根据本公开的一方面，提供了一种触控基板，包括：基底，以及依次设置在所述基底上的触控单元和发光单元，其中所述触控单元与 所述发光单元在所述基底上的正投影至少部分重叠。
根据本公开的一些实施例，所述触控单元的数量为多个，每个所述触控单元包括读取晶体管和感光器件，并且，所述读取晶体管的第一极连接所述感光器件，所述读取晶体管的第二极连接所述读取信号线，所述读取晶体管的控制极连接驱动信号线。
根据本公开的一些实施例，所述感光器件包括依次设置在所述基底上的第二电极、感光层、第一电极，所处触控基板还包括绝缘层，所述绝缘层设置在所述感光器件的第一电极上，所述读取晶体管的第一极通过贯穿所述绝缘层的过孔与所述感光器件的第一电极连接。
根据本公开的一些实施例，多个所述触控单元呈阵列排布。位于同一行的所述触控单元的读取晶体管的控制极连接同一条驱动信号线，并且位于同一列的所述触控单元的读取晶体管的第二极连接同一条读取信号线。
根据本公开的一些实施例，所述触控基板还包括交叉设置且相互绝缘的多条栅线和多条数据线，以及设置在所述交叉位置所限定区域的多个像素驱动单元。每个所述像素驱动单元连接与其对应的栅线、数据线以及发光单元，并在所述栅线所输入的控制信号的控制下将所述数据线上所输入的数据信号输出到发光单元，以驱动发光单元发光。
根据本公开的一些实施例，所述像素驱动单元位于所述发光单元与所述感光器件之间。
根据本公开的一些实施例，所述像素驱动单元包括开关晶体管和驱动晶体管，所述开关晶体管和驱动晶体管分别包括第一极、第二极和控制极，所述开关晶体管的控制极和所述驱动晶体管的控制极与所述读取晶体管的控制极同层，所述开关晶体管的第一极、第二极和所述驱动晶体管的第一极、第二极与所述读取晶体管的第一极、第二极同层，并且所述开关晶体管的有源层和所述驱动晶体管的有源层与所述读取晶体管的有源层同层。
根据本公开的一些实施例，所述数据线与所述读取信号线同层设置，并且所述栅线与所述驱动信号线同层设置。
根据本公开的一些实施例，所述发光单元为有机电致发光二极管。
根据本公开的另一方面，提供了一种显示装置，其包括上述任一种触控基板。
根据本公开的又一方面，提供了一种触控基板的制作方法，包括：提供基底；在基底上提供触控单元；以及在触控单元上方提供发光单元。所述触控单元与所述发光单元在所述基底上的正投影至少部分重叠。
根据本公开的一些实施例，在基底上提供触控单元包括：提供读取晶体管和感光器件，其中所述读取晶体管的第一极连接感光器件，所述读取晶体管的第二极连接读取信号线，并且所述读取晶体管的控制极连接驱动信号线。
根据本公开的一些实施例，提供所述感光器件包括在所述基底上依次设置第二电极、感光层、第一电极。所述方法还包括：在所述感光器件的第一电极上设置绝缘层；在所述绝缘层中设置贯穿所述绝缘层的过孔，以便连接所述读取晶体管的第二极和所述感光器件的第一电极。
根据本公开的一些实施例，上述方法还包括在所述发光单元与所述感光器件之间提供像素驱动单元，所述像素驱动单元包括开关晶体管和驱动晶体管，其中，在同一个工艺步骤中形成所述开关晶体管的控制极、所述驱动晶体管的控制极和所述读取晶体管的控制极。在同一个工艺步骤中形成所述开关晶体管的第一极、第二极、所述驱动晶体管的第一极、第二极和所述读取晶体管的第一极、第二极。在同一个工艺步骤中形成所述开关晶体管的有源层、所述驱动晶体管的有源层和所述读取晶体管的有源层。
根据本公开的一些实施例，上述方法还包括：提供交叉设置且相互绝缘的多条栅线和多条数据线；以及提供多条驱动信号线和多条读取信号线。各个触控单元呈阵列排布，位于同一行的触控单元的读取晶体管的控制极连接同一条驱动信号线，位于同一列的触控单元的读取晶体管的第二极连接同一条读取信号线，并且在同一个工艺步骤中形成所述数据线和所述读取信号线，并且在同一个工艺步骤中形成所述栅线和所述驱动信号线。
附图说明
图1为本公开的实施例1的触控基板的结构示意图；
图2为本公开的实施例2的触控基板中的触控单元的排布示意图；
图3为公开的实施例2的触控基板中的像素区中的电路示意。
具体实施方式
为使本领域技术人员更好地理解本公开的技术方案，下面结合附图和具体实施方式对本公开作进一步详细描述。
在附图和具体实施方式的以下描述中，使用以下附图标记：
10、基底；1、感光器件；11、第一电极；12、第二电极；13、感光层；2、读取晶体管；31、阳极；32阴极、；33、发光材料；4、驱动信号线；5、读取信号线；M1、开关晶体管；M2、驱动晶体管；C1、存储电容；OLED、有机电致发光二极管；Gate、栅线；Data、数据线；VDD、第一电源端；VSS、第二电源端。
本公开的一个实施例提供了一种触控基板，如图1所示，包括：基底10，依次设置在基底10上的触控单元和发光单元，且触控单元与发光单元在基底10上的正投影至少部分重叠。
发光单元例如可以为如图1中所示的有机发光二极管(OLED)器件，其包括阳极31、阴极32，以及设置在阳极31和阴极32之间的发光材料33。
触控单元例如可以包括读取晶体管2和感光器件1。感光器件1包括第一电极11、第二电极12，以及设置在第一电极11和第二电极12之间的感光层13。例如，感光层13可以包括PIN结或有机感光材料等。
进一步地，如图1所示，每个触控单元中的感光器件1和读取晶体管2沿背离基底10的方向依次设置，且在感光器件1和读取晶体管2之间设置有绝缘层4。读取晶体管2的第二极21通过贯穿该绝缘层4的过孔与感光器件1的第一电极11连接。
需要说明的是，尽管在图1所示的实施例中，以发光单元为OLED、触控单元包括读取晶体管和感光器件为例来说明本公开，但是如本领域技术人员所知的，发光单元和触控单元可以采用其它结构。
在示例实施例中，触控单元周期性地设置在显示面板的显示区域内，也即发光单元所在区域。一个触控单元可以对应呈矩阵排布的多个发光单元，而无需与发光单元一一对应。触控单元的布置可以由本领域技术人员根据实际需要而设置，以便实现所要求的触控精度。同样地，发光单元的布置也可以由本领域技术人员根据实际需要而设置， 以便实现所要求的显示分辨率。
在将上述触控基板应用至显示面板中时，发光单元所发出的光被用户的手指反射而回到触控单元，并且触控单元根据所接收到的光线的强弱来判断用户的手指触摸的位置，以便实现触控功能。
在本公开的实施例中所提供的触控基板中，发光单元位于触控单元上方，也就是说，在制备该触控基板时，不同于先制备发光单元、然后制备触控单元的常规技术，可以先制备触控单元，然后再制备发光单元，因此触控单元和发光单元在基底上的正投影可以交叠，而不会影响触控基板的显示功能，并且因而可以提高触控基板的开口率和分辨率。
具体地，触控基板包括交叉且相互绝缘设置在基底上方的多条栅线和多条数据线。多条栅线和多条数据线的每个交叉位置限定一个像素区，并且在每一个像素区中设置像素驱动单元和发光单元。每个所述像素驱动单元连接与其对应的栅线、数据线，以及发光单元，并在所述栅线所输入的控制信号的控制下将所述数据线上所输入的数据电压输出给发光单元，以驱动发光单元发光。
触控基板还包括位于基底与发光单元之间的触控单元。如图2所示，触控单元呈阵列排布，并且每个触控单元包括感光器件1和读取晶体管2，并且与对应的驱动信号线4和读取信号线5连接。感光器件1配置成感测由发光单元发出、并且经由用户的手指反射回来的光线的强弱，并且将该光信号转换成电信号。当向驱动信号线4施加有效信号时，读取晶体管2导通，使得由感光器件1生成的电信号通过读取晶体管2传输至读取信号线5。通过读取每一条读取信号线5上的电信号，可以确定触控基板上的触摸位置。
具体地，在触控识别阶段，逐行扫描驱动信号线4，并且依次对读取信号线5进行读取。当扫描第N行驱动信号线4时，如果由于受到手指反射光的影响而使得第M列读取信号线5所读取到的数据为高电平时，可以确定位于第N行驱动信号线4和第M列读取信号线5的交叉处接收到触控。通过逐行扫描所有的驱动信号线4并且依次读取所有的读取信号线5，可以实现对整个触控屏的触控检测。
如本文所使用的，术语“有效信号”是指能够使得读取晶体管导通的电信号。例如，如果读取晶体管为P型晶体管，则有效信号为低 电平信号；如果读取晶体管为N型晶体管，则有效信号为高电平信号。
图3图示了一个像素驱动单元的示意图。如图3所示，像素驱动单元包括驱动晶体管M2、开关晶体管M1和存储电容器C1。开关晶体管M1的控制极与栅线Gate相连，第一极与数据线Data连接，并且第二极与驱动晶体管M2的控制极相连。驱动晶体管M2的第一极与第一电源端VDD相连，并且第二极与发光单元OLED的阳极相连。发光单元OLED的阴极与第二电源端VSS相连。存储电容器C1的第一端连接在开关晶体管M1的第二极和驱动晶体管M2的控制极之间，并且第二端连接在驱动晶体管M2的第一极与第一电源端VDD之间。
对于阵列排布的多个像素驱动单元，位于同一行的像素驱动单元中的开关晶体管M1的控制极连接同一条栅线Gate，位于同一列像素驱动单元中的开关晶体管M1的第一极连接同一条数据线Data，并且每个开关晶体管M1的第二极连接与其对应的驱动晶体管M2的控制极。
在此需要说明的是，上述内容仅仅是以像素驱动单元包括2T1C的像素电路为例进行说明的，但这并不构成对像素驱动单元的限定。如本领域技术人员将认识到的，该像素驱动单元可以为6T2C、4T2C的像素电路等，在此不再详细描述。
在本公开的示例实施例中，像素驱动单元中的开关晶体管M1和驱动晶体管M2与触控单元中的读取晶体管2同层设置。具体地，开关晶体管M1的控制极和驱动晶体管M2的控制极与读取晶体管2的控制极同层，开关晶体管M1的第一极、第二极和驱动晶体管M2的第一极、第二极与读取晶体管2的第一极、第二极同层，并且开关晶体管M1的有源层和驱动晶体管M2的有源层与读取晶体管2的有源层同层。由此可以显著减小触控基板的厚度，有利于显示装置的轻薄化。而且可以在一次制备工艺中制备完成像素驱动单元中的开关晶体管M1和驱动晶体管M2与触控单元中的读取晶体管2，从而提高产能，降低生产成本。
在本公开的示例实施例中，数据线Data可以与读取信号线5同层设置，例如，数据线Data可以与读取信号线沿列方向平行设置。所述栅线Gate可以与驱动信号线4同层设置，例如，栅线Gate可以与驱动信号线4沿行方向平行设置。这样的设置可以简化触控基板的布线并 使其更加均匀，从而有助于实现显示均一性。
根据本公开的另一方面，提供了一种显示装置，包括上述任一种触控基板。
在本公开的实施例中所提供的显示装置中，发光单元位于触控单元上方，也就是说，在制备该触控基板时，不同于先制备发光单元、然后制备触控单元的常规技术，可以先制备触控单元，然后再制备发光单元，因此触控单元和发光单元在基底上的正投影可以交叠，而不会影响触控基板的显示功能，并且因而可以提高触控基板的开口率和分辨率。
所述显示装置可以为OLED面板、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
根据本公开的又一方面，提供了一种触控基板的制作方法，包括：提供基底；在基底上提供触控单元；以及在触控单元上方提供发光单元。所述触控单元与所述发光单元在所述基底上的正投影至少部分重叠。
在通过这样的方法制作的触控基板中，不同于先制备发光单元、然后制备触控单元的常规技术，可以先制备触控单元，然后再制备发光单元，因此触控单元和发光单元在基底上的正投影可以交叠，而不会影响触控基板的显示功能，并且因而可以提高触控基板的开口率和分辨率。
在示例实施例中，在基底上提供触控单元可以包括：提供读取晶体管和感光器件，其中所述读取晶体管的第一极连接感光器件，所述读取晶体管的第二极连接读取信号线，并且所述读取晶体管的控制极连接驱动信号线。
在示例实施例中，提供所述感光器件可以包括在所述基底上依次设置第二电极、感光层、第一电极。此时，所述方法还包括：在所述感光器件的第一电极上设置绝缘层；在所述绝缘层中设置贯穿所述绝缘层的过孔，以便连接所述读取晶体管的第二极和所述感光器件的第一电极。
在示例实施例中，上述方法还可以包括在所述发光单元与所述感光器件之间提供像素驱动单元，所述像素驱动单元包括开关晶体管和 驱动晶体管，其中，在同一个工艺步骤中形成所述开关晶体管、所述驱动晶体管和所述读取晶体管。具体地，在同一个工艺步骤中形成所述开关晶体管的控制极、所述驱动晶体管的控制极和所述读取晶体管的控制极，在同一个工艺步骤中形成所述开关晶体管的第一极、第二极、所述驱动晶体管的第一极、第二极和所述读取晶体管的第一极、第二极，并且在同一个工艺步骤中形成所述开关晶体管的有源层、所述驱动晶体管的有源层和所述读取晶体管的有源层。
通过在同一个工艺步骤中形成所述开关晶体管、所述驱动晶体管和所述读取晶体管，可以显著减小触控基板的厚度，从而有利于显示装置的轻薄化，提高产能，并且降低生产成本。
在示例实施例中，上述方法还可以包括：提供交叉设置且相互绝缘的多条栅线和多条数据线；以及提供多条驱动信号线和多条读取信号线。各个触控单元呈阵列排布，位于同一行的触控单元的读取晶体管的控制极连接同一条驱动信号线，位于同一列的触控单元的读取晶体管的第二极连接同一条读取信号线，并且在同一个工艺步骤中形成所述数据线和所述读取信号线，并且在同一个工艺步骤中形成所述栅线和所述驱动信号线。
通过在同一个工艺步骤中形成所述数据线和所述读取信号线，并且在同一个工艺步骤中形成所述栅线和所述驱动信号线，可以明显简化制作工艺，降低生产成本。
可以理解的是，以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式，然而本公开并不局限于此。对于本领域内的普通技术人员而言，在不脱离本公开的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本公开的保护范围。

Claims (15)

  1. 一种触控基板，包括：
    基底；以及
    依次设置在所述基底上的触控单元和发光单元，
    其中，所述触控单元与所述发光单元在所述基底上的正投影至少部分重叠。
  2. 根据权利要求1所述的触控基板，其中，所述触控单元的数量为多个，每个所述触控单元包括读取晶体管和感光器件，并且，所述读取晶体管的第一极连接所述感光器件，所述读取晶体管的第二极连接所述读取信号线，所述读取晶体管的控制极连接驱动信号线。
  3. 根据权利要求2所述的触控基板，其中，所述感光器件包括依次设置在所述基底上的第二电极、感光层、第一电极，所处触控基板还包括绝缘层，所述绝缘层设置在所述感光器件的第一电极上，所述读取晶体管的第一极通过贯穿所述绝缘层的过孔与所述感光器件的第一电极连接。
  4. 根据权利要求2所述的触控基板，其中，多个所述触控单元呈阵列排布，
    位于同一行的所述触控单元的读取晶体管的控制极连接同一条驱动信号线，并且
    位于同一列的所述触控单元的读取晶体管的第二极连接同一条读取信号线。
  5. 根据权利要求2所述的触控基板，其中，所述触控基板还包括交叉设置且相互绝缘的多条栅线和多条数据线，以及设置在所述交叉位置所限定区域的多个像素驱动单元，并且，
    每个所述像素驱动单元连接与其对应的栅线、数据线以及发光单元，并在所述栅线所输入的控制信号的控制下将所述数据线上所输入的数据信号输出到发光单元，以驱动发光单元发光。
  6. 根据权利要求5所述的触控基板，其中，所述像素驱动单元位于所述发光单元与所述感光器件之间。
  7. 根据权利要求5或6所述的触控基板，其中，所述像素驱动单元包括开关晶体管和驱动晶体管，所述开关晶体管和驱动晶体管分别 包括第一极、第二极和控制极，所述开关晶体管的控制极和所述驱动晶体管的控制极与所述读取晶体管的控制极同层，所述开关晶体管的第一极、第二极和所述驱动晶体管的第一极、第二极与所述读取晶体管的第一极、第二极同层，并且所述开关晶体管的有源层和所述驱动晶体管的有源层与所述读取晶体管的有源层同层。
  8. 根据权利要求5或6所述的触控基板，其中，所述数据线与所述读取信号线同层设置，并且所述栅线与所述驱动信号线同层设置。
  9. 根据权利要求1所述的触控基板，其中，所述发光单元为有机电致发光二极管。
  10. 一种显示装置，包括权利要求1-9中任一项所述的触控基板。
  11. 一种触控基板的制作方法，包括：
    提供基底；
    在基底上提供触控单元；以及
    在触控单元上方提供发光单元，
    其中，所述触控单元与所述发光单元在所述基底上的正投影至少部分重叠。
  12. 根据权利要求11所述的方法，其中在基底上提供触控单元包括：
    提供读取晶体管和感光器件，其中所述读取晶体管的第一极连接感光器件，所述读取晶体管的第二极连接读取信号线，并且所述读取晶体管的控制极连接驱动信号线。
  13. 根据权利要求12所述的方法，其中，提供所述感光器件包括在所述基底上依次设置第二电极、感光层、第一电极，并且所述方法还包括：
    在所述感光器件的第一电极上设置绝缘层；
    在所述绝缘层中设置贯穿所述绝缘层的过孔，以便连接所述读取晶体管的第二极和所述感光器件的第一电极。
  14. 根据权利要求12所述的方法，还包括在所述发光单元与所述感光器件之间提供像素驱动单元，所述像素驱动单元包括开关晶体管和驱动晶体管，
    其中，在同一个工艺步骤中形成所述开关晶体管的控制极、所述驱动晶体管的控制极和所述读取晶体管的控制极，
    在同一个工艺步骤中形成所述开关晶体管的第一极、第二极、所述驱动晶体管的第一极、第二极和所述读取晶体管的第一极、第二极，并且
    在同一个工艺步骤中形成所述开关晶体管的有源层、所述驱动晶体管的有源层和所述读取晶体管的有源层。
  15. 根据权利要求12所述的方法，还包括：
    提供交叉设置且相互绝缘的多条栅线和多条数据线；以及
    提供多条驱动信号线和多条读取信号线，
    其中，
    各个触控单元呈阵列排布，
    位于同一行的触控单元的读取晶体管的控制极连接同一条驱动信号线，
    位于同一列的触控单元的读取晶体管的第二极连接同一条读取信号线，并且在同一个工艺步骤中形成所述数据线和所述读取信号线，并且在同一个工艺步骤中形成所述栅线和所述驱动信号线。
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