WO2022165827A1 - 触控面板结构及包含所述触控面板结构的触控显示设备 - Google Patents

触控面板结构及包含所述触控面板结构的触控显示设备 Download PDF

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Publication number
WO2022165827A1
WO2022165827A1 PCT/CN2021/075935 CN2021075935W WO2022165827A1 WO 2022165827 A1 WO2022165827 A1 WO 2022165827A1 CN 2021075935 W CN2021075935 W CN 2021075935W WO 2022165827 A1 WO2022165827 A1 WO 2022165827A1
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WIPO (PCT)
Prior art keywords
touch
unit
panel structure
touch panel
optical fingerprint
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PCT/CN2021/075935
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English (en)
French (fr)
Inventor
朱俊鸿
方玮嘉
萧仲钦
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宸鸿科技(厦门)有限公司
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Priority to PCT/CN2021/075935 priority Critical patent/WO2022165827A1/zh
Publication of WO2022165827A1 publication Critical patent/WO2022165827A1/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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present invention relates to a touch panel structure and a touch display device including the touch panel structure.
  • the present invention relates to a touch panel structure including an optical fingerprint identification unit and a touch display device including the touch panel structure.
  • biometric identification technology For information security, biometric identification technology has been applied in many electronic devices. Among them, the most common is fingerprint recognition.
  • the current fingerprint identification technology is divided into three categories, namely capacitive fingerprint identification, optical fingerprint identification, and ultrasonic fingerprint identification. Due to the characteristics and requirements of the technologies, the three identification technologies have different structures and configurations when applied to electronic devices.
  • optical fingerprint recognition As an example, its durability is better than capacitive fingerprint recognition, and it can be integrated in the display touch area, and the manufacturing cost and yield are better than ultrasonic fingerprint recognition, so it is widely used in smart phones. , tablet and other touch display devices.
  • a common practice is to attach and assemble a commercially available optical fingerprint reader to a display unit (eg, a commercially available display panel). Since the commercially available optical fingerprint reader is opaque and the size is about 1 cm * 1 cm, if it is installed on the display unit, it will affect the visual effect, so it is assembled to a position outside the display unit, for example, in the display unit An area with no display function is set on the side to install the optical fingerprint reader, so it is difficult to meet the current product requirements for full-screen display. On the other hand, in a touch display device, it is often necessary to attach a touch sensor to the display unit to provide a touch function. Therefore, it is necessary to perform a second bonding assembly to assemble the optical fingerprint reader and the touch sensor to the display unit respectively.
  • the present invention provides a touch panel structure integrating optical fingerprint identification and touch sensing.
  • the use of the touch panel structure can reduce the number of bonding and assembly times.
  • the present invention also provides a touch display device including the touch panel structure.
  • a touch panel structure includes: a substrate having an upper surface and a lower surface; and an optical fingerprint identification unit and at least a part of an optical fingerprint recognition unit integrally disposed on the upper surface of the substrate touch sensing unit.
  • the touch panel structure is disposed outside a display unit.
  • a touch display device includes a display unit and a touch panel structure according to an embodiment of the present invention.
  • the display unit has a display area.
  • the touch panel structure is arranged on the display unit.
  • the optical fingerprint identification unit and the touch sensing unit of the touch panel structure are correspondingly overlapped with the display area.
  • FIG. 1 is a schematic diagram of an exemplary touch panel structure.
  • FIG. 2A and 2B are schematic diagrams showing exemplary details of the structure of the touch panel of FIG. 1 .
  • 3 to 6 are schematic diagrams of various other exemplary touch panel structures, respectively.
  • FIG. 7 and 8 are schematic diagrams of exemplary touch display devices.
  • the component When a component is described as being disposed on another component based on Chinese conventions, the component may be located on the upper side, lower side, front side, rear side, left side, or right side of the other component, and may not be affected by Directivity constraints in space, but when describing a component as being disposed on the upper surface, lower surface, front surface, rear surface, left surface, or right surface, etc. of another component, the component is subject to Limited to the surface and correspondingly located on the upper side, the lower side, the front side, the rear side, the left side, or the right side, etc. of the other component. Descriptions of embodiments or alternative components that are well known in the relevant art may be omitted from the specification so as not to obscure the focus of the present invention.
  • FIG. 1 illustrates an exemplary touch panel structure 100 .
  • the touch panel structure 100 includes: a substrate 150 , an optical fingerprint identification unit 110 , and a touch sensing unit 120 .
  • the substrate 150 has an upper surface 152 and a lower surface 154 .
  • the optical fingerprint recognition unit 110 and at least a part of the touch sensing unit 120 are integrally disposed on the upper surface 152 of the substrate.
  • the terms "transparent” or “transparent” as used herein mean that the transmittance of light in the visible wavelength range is greater than 85%, greater than 90%, greater than 95%, greater than 99%, or Approaching or equal to 100%; "invisible” and similar terms mean that it cannot be discerned by the naked eye.
  • the touch panel structure 100 of the embodiment of the present invention is an external touch panel, that is to say, the touch panel structure 100 is disposed outside the display unit to provide the functions of fingerprint identification and touch sensing.
  • the touch panel structure 100 of the embodiment of the present invention is preferably transparent, for example, invisible to the human eye under the wavelength range of visible light (400-700 nm).
  • the light transmittance of the touch panel structure 100 in the visible light wavelength range is greater than 85%, greater than 90%, greater than 95%, greater than 99%, or close to or equal to 100%.
  • FIG. 2A and FIG. 2B respectively illustrate an exemplary cross-sectional schematic diagram and a top-view schematic diagram of the touch panel structure 100 , wherein, in order to clearly show the structure of the touch sensing unit 120 , FIG. 2B omits the elements in FIG. 2A .
  • the substrate 150 may be, but is not limited to, rigid or flexible substrates, such as glass substrates, polyethylene terephthalate (PET) substrates, cycloolefin polymer (COP) substrates, transparent polyimide (CPI) substrates, polynaphthalene Ethylene dicarboxylate (PEN) substrate, polycarbonate (PC) substrate, polyethersulfone (PES) substrate, etc.
  • PET polyethylene terephthalate
  • COP cycloolefin polymer
  • CPI transparent polyimide
  • PEN polynaphthalene Ethylene dicarboxylate
  • PC polycarbonate
  • PES polyethersulfone
  • the optical fingerprint recognition unit 110 and the touch sensing unit 120 can be formed on other related components, such as an optical film, which is used as the substrate 150 and further integrated with other related components.
  • the optical film used as the substrate 150 for forming the optical fingerprint recognition unit 110 and the touch sensing unit 120 is, for example, but not limited to, a polarizing film, a retardation film, and the like.
  • the optical fingerprint recognition unit 110 and the touch sensing unit 120 are integrally disposed on the upper surface 152 of the substrate 150 .
  • the optical fingerprint identification unit 110 is transparent in the visible light range, or the optical fingerprint identification unit 110 may be set corresponding to a unit pixel of the display unit, so as to be optically invisible, thereby preventing the optical fingerprint identification unit 110 from being detected by the user. observed to cause poor display quality.
  • the optical fingerprint identification unit 110 includes a plurality of light emitting elements and a plurality of light receiving elements.
  • the light-receiving element of the optical fingerprint identification unit 110 may include, for example, a thin film transistor (TFT) 102, and the thin film transistor 102 includes, for example, amorphous silicon, polycrystalline silicon, single crystal silicon, metal oxide, or Active layer of organic semiconductors.
  • TFT thin film transistor
  • the optical fingerprint recognition unit 110 can also use other suitable photodiodes or light emitting components.
  • the light receiving components are transparent in the visible light range, such as thin film transistors 102 made of metal oxides such as ZnO, IGZO, and the like.
  • opaque light-receiving components such as thin film transistors 102 made of hydrogenated amorphous silicon can be arranged in a matrix corresponding to the unit pixels of the display unit, so as to be difficult to be visually observed by human eyes.
  • a deposition process such as chemical vapor deposition, physical vapor deposition (eg, sputtering technology) can be used to fabricate the light-receiving device.
  • the light emitting device may include a photodiode 104, such as a PIN photodiode, an organic polymer photodiode, or a heterojunction photodiode.
  • the light emitting components are transparent in the visible light range, or the light emitting components are arranged in a matrix corresponding to the unit pixels of the display unit.
  • the light emitting elements can be arranged in a matrix structure, and the position/pattern of the light emitting elements corresponds to a unit pixel of the display unit, so it is not easy to be visually observed by the human eye.
  • the light emitting component can be made of materials that are transparent in the visible light range.
  • the "visible light range is transparent" or “visually invisible” referred to here can be understood with reference to the foregoing content, and will not be repeated here.
  • a plurality of thin film transistors 102 are disposed on the upper surface 152 of the substrate 150 .
  • a dielectric layer 106 covers the thin film transistor 102 .
  • a plurality of photodiodes 104 are disposed on the dielectric layer 106 and are connected to the corresponding thin film transistors 102 through a plurality of via structures 108 passing through the dielectric layer 106 .
  • the stacking sequence of the thin film transistor 102 , the dielectric layer 106 and the photodiode 104 can be adjusted as required.
  • the optical fingerprint recognition unit 110 after the optical fingerprint recognition unit 110 is formed on the substrate 150 , it can be used as a manufacturing substrate of the touch sensing unit 120 described later, that is to say, it can be used as a carrier board in the process.
  • the touch sensing unit 120 is fabricated thereon.
  • a thin-film touch sensing unit 120 may be attached thereon; or a transparent conductive film may be fabricated thereon, and then circuits such as electrodes of the touch sensing unit 120 may be fabricated through a patterning process.
  • the touch panel structure 100 may further include an optical adjustment layer 112 , as shown in FIG. 2A .
  • the optical adjustment layer 112 is disposed on the optical fingerprint identification unit 110 .
  • the optical adjustment layer 112 includes, for example, but not limited to, a light-collimating film, a microscope film, or a combination thereof.
  • the touch panel structure 100 may further include an encapsulation layer 130, as shown in FIG. 2A.
  • the encapsulation layer 130 is disposed on the optical fingerprint identification unit 110, or as shown in FIG. 2A, when the optical adjustment layer 112 is present, the encapsulation layer 130 is disposed on the optical adjustment layer 112 (that is, the optical adjustment layer 112 is disposed on the optical adjustment layer 112).
  • the encapsulation layer 130 is disposed on the optical adjustment layer 112). Therefore, the encapsulation layer 130 is disposed between the optical fingerprint identification unit 110 and the touch sensing unit 120 , and can serve as an isolation structure between the optical fingerprint identification unit 110 and the touch sensing unit 120 in some embodiments.
  • the encapsulation layer 130 may be a single layer of inorganic encapsulation materials, a multi-layer stack of inorganic encapsulation materials, or a stack of pairs of inorganic encapsulation materials and organic encapsulation materials.
  • the inorganic encapsulating material used is, for example, but not limited to, silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiONx), aluminum oxide (AlOx), or titanium oxide (TiOx).
  • the touch sensing unit 120 may be a single-sided sensing element disposed on the optical fingerprint recognition unit 110 , or may be disposed on the encapsulation layer 130 or the optical adjustment layer 112 in different embodiments.
  • the touch sensing unit 120 is, for example, capacitive sensing, and preferably has the property of being transparent in the visible light range.
  • the touch sensing unit 120 includes a touch electrode layer disposed on the optical fingerprint recognition unit 110 .
  • a single-layer electrode structure as shown in FIG. 2A and FIG.
  • the touch electrode layer includes a plurality of touch electrodes 122/128, and the touch electrodes 122/128 can be arranged in an orthogonal row-column structure with the same axis
  • the touch electrodes 128 in the same direction can be connected to each other by the connection electrodes 129; and the touch electrodes 122 in the same axis are connected by the bridge structure 126, that is, the bridge structure 126 can be arranged on the dielectric layer 124 to connect the phases.
  • Adjacent touch electrodes 122, touch electrodes 122/128 are insulated from each other, and a node is formed at the intersection.
  • the touch electrode layer of the single-sided touch sensing unit may be disposed on the upper surface 152 of the substrate 150 and located on the same layer as the optical fingerprint recognition unit 110 . In some embodiments, the touch electrode layer of the single-sided touch sensing unit may be disposed on the lower surface 154 of the substrate 150 . In some embodiments, the touch sensing unit can be a double-sided sensing element, which includes a first touch electrode layer and a second touch electrode layer, and the first touch electrode layer is disposed on the optical On the optical fingerprint identification unit 110 (located on the upper surface 152 and located on the same layer as the optical fingerprint identification unit 110 ), the second touch electrode layer is disposed on the lower surface 154 of the substrate 150 .
  • the double-sided touch sensing unit includes a first touch electrode layer and a second touch electrode layer, the first touch electrode layer is disposed on the optical fingerprint identification unit 110 , the second touch electrode layer is The touch electrode layer is arranged on the first touch electrode layer, and an insulating layer is arranged therebetween.
  • the touch sensing unit may include selected from indium tin oxide (ITO), metal mesh (metal mesh), silver nanowire (SNW), carbon nanotube (CNT), Graphene, or conductive polymers such as poly(3,4-ethylenedioxythiophene, PEDOT) materials, especially the touch electrode layer, can use one of these materials or more to form.
  • ITO indium tin oxide
  • metal mesh metal mesh
  • SNW silver nanowire
  • CNT carbon nanotube
  • Graphene conductive polymers
  • PEDOT poly(3,4-ethylenedioxythiophene
  • the optical fingerprint recognition unit 110 and the touch sensing unit 120 may be driven by a single chip or by separate chips, which do not need to be particularly limited.
  • the touch panel structure 100 may further include an outer cover layer 140 .
  • the outer cover layer 140 may be glass, tempered glass, sapphire, etc., which is arranged as the uppermost layer of the touch panel structure 100 , for example, the outer cover layer 140 is arranged on the optical fingerprint identification unit 110 and the touch sensing unit 120 , That is, where the user touches.
  • the term "outer cover layer” is a common term in the related art, and cover protective layers having the same function but including or formed of other non-glass materials should also be covered within its scope.
  • the substrate 150 can also be used as the cover layer 140 to reduce material cost.
  • the touch panel structure 100 since the components of the optical fingerprint identification unit 110, such as the photodiode 104 and the thin film transistor 102, are quite small and do not affect the vision, a substantially transparent optical fingerprint identification unit 110 can be formed. Therefore, even if the optical fingerprint identification unit 110 is disposed on the display unit, that is, an on-screen optical fingerprint identification unit is formed, the problem of uneven brightness (mura) will not occur, and there is no need to deliberately match the display unit to be assembled. The position of the pixel in . Other layers can be formed using a combination of transparent materials and similarly sized microstructures. Therefore, the touch panel structure 100 may be transparent, for example, may have a light transmittance of more than 80% or more than 85%. The transparent touch panel structure 100 is attached and assembled on the display unit, and the fingerprint identification function and the touch function can be provided in only one lamination and assembly.
  • the optical fingerprint identification unit 110 is substantially transparent, the area occupied by the fingerprint identification area can be enlarged without affecting the vision.
  • the touch sensing unit 120 has an area A1
  • the optical fingerprint identification unit 110 has an area A2.
  • the area A2 of the optical fingerprint identification unit 110 may occupy at least 1/1 of the area A1 of the touch sensing unit 120. 3.
  • the user can perform fingerprint identification more conveniently, without being limited to a tiny fingerprint identification area, and it is also possible to perform fingerprint identification of multiple fingers to provide higher data security.
  • the area A2 of the optical fingerprint recognition unit 110 may occupy at least 1/3, 1/3 to 1/2, or all of the area A1 of the touch sensing unit 120 according to requirements.
  • the area A2 of the optical fingerprint recognition unit 110 is equal to the area A1 of the touch sensing unit 120 . That is, the touch panel structure 100 provides a full-screen fingerprint recognition area. It can be understood that, since Figure 1 is drawn as a cross-sectional view, the indications for the areas A1 and A2 extend in two dimensions, but in fact there is a third-dimensional extension in the direction perpendicular to the paper surface. The specific situation should be as shown in Figure 8. Illustrator. The same is true for the indication of area in other figures shown in cross-section. In addition, for the convenience of description, the area A1 drawn in FIG. 8 may represent the area occupied by the touch sensing unit 120 and may also represent the display area of the display.
  • touch panel structures are provided below to make possible variations more clearly understood by those skilled in the art.
  • Components denoted by the same reference numerals as those of the above-described embodiment are substantially the same as those described above with reference to FIG. 1 and FIGS. 2A-2B .
  • the same components, features, and advantages as the touch panel structure 100 will not be described again.
  • FIG. 3 illustrates an exemplary touch panel structure 100A.
  • the optical fingerprint identification unit 110 is not a full-screen configuration, so a fingerprint identification area R2 and a non-fingerprint identification area R3 are defined in the touch panel structure 100A.
  • the fingerprint identification area R2 has an area A2a, that is, the optical fingerprint identification unit 110 has an area A2a, and the non-fingerprint identification area R3 has an area A3a.
  • the area A2a of the optical fingerprint recognition unit 110 is 1/3 to 1/2 of the area A1 of the touch sensing unit 120 .
  • FIG. 4 illustrates an exemplary touch panel structure 100B.
  • the optical fingerprint recognition unit 110 includes a plurality of fingerprint recognition regions R2a.
  • the fingerprint recognition area R2a is separated by the non-fingerprint recognition area R3.
  • the sum of the areas of all the fingerprint identification regions R2a may occupy at least 1/3 of the area A1 of the touch sensing unit 120 .
  • the area of each fingerprint identification region R2a may be 1/3 to 1/2 of the area A1 of the touch sensing unit 120 .
  • FIG. 5 illustrates an exemplary touch panel structure 100C.
  • the difference between the touch panel structure 100C and the touch panel structure 100 is that it has a touch sensing unit 120A.
  • the touch sensing unit 120A includes a first touch electrode layer 120A1 and a second touch electrode layer 120A2.
  • the first touch electrode layer 120A1 is disposed on the optical fingerprint identification unit 110 .
  • the second touch electrode layer 120A2 is disposed on the lower surface 154 of the substrate 150 .
  • the materials and other characteristics used by the touch sensing unit 120A are similar to those of the touch sensing unit 120 , and details are not described herein again.
  • the fingerprint identification area formed by the optical fingerprint identification unit 110 may have the changes as shown in FIG. 3 and FIG. 4 .
  • FIG. 6, illustrates an exemplary touch panel structure 100F.
  • the difference between the touch panel structure 100F and the touch panel structure 100 is that it has a touch sensing unit 120B, and the optical fingerprint recognition unit 110 and the encapsulation layer 130 are accordingly changed accordingly.
  • the touch sensing unit 120B includes a touch electrode layer.
  • the touch electrode layer is disposed on the upper surface 152 of the substrate 150 and is located on the same layer as the optical fingerprint identification unit 110 .
  • the materials and other characteristics used by the touch sensing unit 120B are similar to those of the touch sensing unit 120 , and details are not described herein again.
  • the touch sensing unit 120B may be a double-sided sensing unit.
  • the touch display device 10 includes a display unit 200 and a touch panel structure 100 .
  • the display unit 200 has a display area.
  • the touch panel structure 100 is disposed on the display unit 200 .
  • the optical fingerprint recognition unit 110 and the touch sensing unit 120 of the touch panel structure 100 are correspondingly overlapped with the display area.
  • the display unit 200 may be, but is not limited to, a liquid crystal display unit (LCD), an organic electroluminescence display unit, a transparent display unit, or a micro light emitting diode display unit ( ⁇ LED display).
  • LCD liquid crystal display unit
  • ⁇ LED display micro light emitting diode display unit
  • An adhesive layer 300 may be disposed on the display unit 200 to attach the touch panel structure 100 to the display unit 200 to provide the on-screen optical fingerprint recognition unit 110 and the touch sensing unit 120 .
  • the touch panel structure 100 may be disposed between the polarizer (not shown) of the touch display device 10 and the display unit 200 . between.
  • the touch panel structure 100 has both the optical fingerprint recognition unit 110 and the touch sensing unit 120 , the fingerprint recognition function and the touch function of the touch display device 10 can be provided with only one bonding and assembly. Moreover, since the touch panel structure 100 is transparent, the area occupied by the fingerprint identification area can be enlarged. For example, the area A1 of the touch sensing unit 120 may be substantially the same as the area of the display area R, and the area A2 of the optical fingerprint recognition unit 110 may occupy at least 1/3 of the area of the display area R. It will be appreciated that although FIG. 7 uses the touch panel structure 100 as an example, other touch panel structures according to embodiments may be used.

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Abstract

本发明提供一种触控面板结构，该触控面板结构包括：一基板、一光学式指纹辨识单元、和一触控感测单元。基板具有一上表面和一下表面。光学式指纹辨识单元及至少一部份的一触控感测单元整合设置在基板的上表面上。触控面板结构是设置于一显示单元的外侧。

Description

触控面板结构及包含所述触控面板结构的触控显示设备 技术领域
本发明是关于一种触控面板结构及包含所述触控面板结构的触控显示设备。本发明特别是关于一种包括光学式指纹辨识单元的触控面板结构及包含所述触控面板结构的触控显示设备。
背景技术
为了信息安全，在许多电子装置中都已应用生物辨识技术。其中，最普遍的是指纹辨识。目前的指纹辨识技术分为三大类，分别是电容式指纹辨识、光学式指纹辨识、和超音波式指纹辨识。由于技术的特性和需求，三种辨识技术在应用于电子装置时具有不同的结构和配置。
以光学式指纹辨识为例，其耐用性较电容式指纹辨识佳，并可以整合在显示触控区中，而制造成本和良率又优于超音波式指纹辨识，因此被广泛应用在智能型手机、平板等触控显示设备中。一般的作法是将市售的光学式指纹辨识器贴合组装至显示单元(例如市售的显示面板)。由于市售的光学式指纹辨识器不透明，且大小约在1厘米*1厘米的尺度，如果设置在显示单元上会影响视觉效果，所以将其组装至显示单元之外的位置，例如在显示单元侧边设置一个不具显示功能的区域来安装光学式指纹辨识器，因此难以符合目前全屏幕显示的产品需求。另一方面，在触控显示设备中，往往还需要将触控传感器贴合组装至显示单元上以提供触控功能。因此，需要进行二次的贴合组装，以分别将光学式指纹辨识器和触控传感器组装至显示单元。
发明内容
本发明提供一种整合光学式指纹辨识和触控感测的触控面板结构。使用所述触控面板结构可以减少贴合组装次数。本发明亦提供一种包含所述触控面板结构的触控显示设备。
根据本发明实施例的触控面板结构包括：一基板，具有一上表面和一 下表面；以及整合设置在所述基板的所述上表面上的一光学式指纹辨识单元及至少一部份的一触控感测单元。触控面板结构是设置于一显示单元的外侧。
根据本发明实施例的触控显示设备包括一显示单元和根据本发明实施例的触控面板结构。显示单元具有一显示区。触控面板结构设置在显示单元上。触控面板结构的光学式指纹辨识单元和触控感测单元对应地与显示区重迭。
附图说明
图1为例示性的触控面板结构的示意图。
图2A和图2B为图1的触控面板结构例示性的具体细节的示意图。
图3至图6分别为其他各种不同的例示性的触控面板结构的示意图。
图7和图8为例示性的触控显示设备的示意图。
附图标记说明
10触控显示设备
100,100A,100B,100C,100F触控面板结构
102薄膜晶体管
104光二极管
106介电层
108导孔结构
110光学式指纹辨识单元
112光学调整层
120,120A,120B触控感测单元
120A1第一触控电极层
120A2第二触控电极层
122、128触控电极
124介电层
126架桥结构
129连接电极
130封装层
140外盖层
150基板
152上表面
154下表面
200显示单元
300黏着层
A1,A2,A2a,A3a面积
R显示区
R2,R2a指纹辨识区
R3非指纹辨识区
具体实施方式
以下将参照所附图式对于各种不同的实施例作详细的说明。在此提供的叙述和所附图式内容是用于例示和解释目的，不应作为本发明的限制。举例来说，当使用“设置在”、“耦接至”等类似用语叙述二个组件之间的关系时，除非另有说明，否则所述二个组件之间可以存在或不存在其他组件，只要不影响组件功能即可。当基于中文惯例形容一组件设置在另一组件上时，所述组件可能位于所述另一组件的上侧、下侧、前侧、后侧、左侧、或右侧等处，可以不受到空间中方向性的限制，但当形容一组件设置在另一组件的上表面上、下表面上、前表面上、后表面上、左表面上、或右表面上等时，所述组件会受限于所述表面而对应位于所述另一组件的上侧、下侧、前侧、后侧、左侧、或右侧等处。说明书中可能省略对于相关领域中所熟知的实施方式或替代组件的说明，以免模糊本发明的焦点。图式中使用相同的组件符号来表示相同或相似的组件。为了清楚起见，所附图式可能并未依照实际比例进行绘示，且部分图式中可能省略部分组件和/或组件符号。可以预期的是，一实施例中的组件和/或特征可能被包含在另一实施例中，即使未在此提供相关叙述。
请参照图1，其绘示例示性的触控面板结构100。触控面板结构100包括：一基板150、一光学式指纹辨识单元110、和一触控感测单元120。基板150具有一上表面152和一下表面154。光学式指纹辨识单元110及 至少一部份的触控感测单元120整合设置在基板的上表面152上。若没有特别说明的情况下，本文所使用的“透明”或“透光”等类似用语是指在可见光波长范围的光穿透率大于85％、大于90％、大于95％、大于99％或者接近或等于100％；”不可见”等类似用语是指人眼裸视下无法辨识。
本发明实施例的触控面板结构100是一种外挂式的触控面板，也就是说触控面板结构100是设置在显示单元的外侧，以提供指纹辨识及触控感应的功能。为了不影响显示的质量，本发明实施例的触控面板结构100较佳为透明的，例如在可见光波长范围(400～700纳米)下是人眼不可见，具体而言，本发明实施例的触控面板结构100在可见光波长范围的光穿透率大于85％、大于90％、大于95％、大于99％或者接近或等于100％。
请同时配合参照图2A和图2B，其分别绘示触控面板结构100例示性的剖面示意图和俯视示意图，其中，为了清楚表现出触控感测单元120的结构，图2B省略图2A中的外盖层140。基板150可以但不限于为硬性或柔性基板，例如玻璃基板、聚对苯二甲酸乙二酯(PET)基板、环烯烃聚合物(COP)基板、透明聚酰亚胺(CPI)基板、聚萘二甲酸乙二酯(PEN)基板、聚碳酸脂(PC)基板、聚醚砜(PES)基板等等。在一些实施例中，可以将光学式指纹辨识单元110和触控感测单元120形成在其他相关组件上，例如形成在光学膜上，以其作为基板150，而进一步与其他相关组件整合。作为基板150而用于形成光学式指纹辨识单元110和触控感测单元120的光学膜例如但不限于为偏光膜、延迟膜等等。
在一些实施例中，光学式指纹辨识单元110和触控感测单元120整合设置在基板150的上表面152上。较佳地，光学式指纹辨识单元110在可见光范围为透明，或者光学式指纹辨识单元110可对应于显示单元的单元画素设置，形成光学不可见，藉此可避免光学式指纹辨识单元110被用户观察到而造成显示质量的不佳。
光学式指纹辨识单元110包括多个光发射组件及多个光接收组件。具体而言，光学式指纹辨识单元110的光接收组件在例如可以包括一薄膜晶体管(thin film transistor,TFT)102，薄膜晶体管102例如具有非晶硅、多晶硅、单晶硅、金属氧化物、或有机半导体的主动层。当然，光学式指纹辨 识单元110也可以使用其他适合的光二极管或光发射组件。在一些实施例中，光接收组件在可见光范围为透明，如采用金属氧化物例如ZnO、IGZO等制成的薄膜晶体管102。在一些实施例中，可以将不透明的光接收组件如采用氢化非晶硅制成的薄膜晶体管102设置成对应于显示单元的单元画素的矩阵，，以在视觉上也不易被人眼所观察到。在一些实施例中，可利用化学气相沉积、物理气相沉积(如溅镀技术)等沉积制程来制作光接收组件。
光发射组件可以包括一光二极管(photodiode)104，光二极管104例如为PIN型光二极管、有机高分子型光二极管、或异质接面型二极管。类似地，光发射组件在可见光范围为透明，或者光发射组件设置成对应于显示单元的单元画素的矩阵。具体来说，在一些实施例中，光发射组件可以设置成矩阵结构，其位置/态样会对应显示单元的单元画素，故在视觉上也不易被人眼所观察到。在另一些实施例中，光发射组件可以选用在可见光范围为透明的材料所制成。此处所指的“可见光范围为透明”或“视觉上不可见”可参照前文内容而理解，于此不再赘述。
在一些实施例中，如图2A所示，多个薄膜晶体管102设置在基板150的上表面152上。一介电层106覆盖薄膜晶体管102。多个光二极管104设置在介电层106上，并借由穿过介电层106的多个导孔结构108连接至对应的薄膜晶体管102。在一些实施例中，可以依需求调整薄膜晶体管102、介电层106与光二极管104的迭层顺序。
根据一些实施例，光学式指纹辨识单元110成型于基板150之后即可作为后文所述触控感测单元120的制作基材，也就是说在制程上可以做为制程上的载板，将触控感测单元120制作于其上。例如可将薄膜型的触控感测单元120贴合于其上；或是将透明导电膜制作于其上，再经由图案化制程制作出触控感测单元120的电极等线路。
根据一些实施例，触控面板结构100可以更包括一光学调整层112，如图2A所示。光学调整层112设置在光学式指纹辨识单元110上。光学调整层112例如但不限于包括光准直薄膜、显微镜薄膜、或其组合。
根据一些实施例，触控面板结构100可以更包括一封装层130，如图 2A所示。封装层130设置在光学式指纹辨识单元110上，或者如图2A所示，当存在有光学调整层112时封装层130设置在光学调整层112上(亦即，光学调整层112设置于光学式指纹辨识单元110之上，封装层130设置于光学调整层112之上)。从而，封装层130设置在光学式指纹辨识单元110与触控感测单元120之间，并在一些实施例中可以作为光学式指纹辨识单元110与触控感测单元120的隔离结构。在本发明中，用词「隔离」涵盖电性隔离及物理隔离二个方面。封装层130可以为无机封装材料的单层、无机封装材料的多层堆栈、或成对的无机封装材料与有机封装材料的堆栈。所使用的无机封装材料例如但不限于为氮化硅(SiNx)、氧化硅(SiOx)、氮氧化硅(SiONx)、氧化铝(AlOx)、或氧化钛(TiOx)。
触控感测单元120可为一种单面形式的感测组件，其设置在光学式指纹辨识单元110上，或者在不同实施例中可设置于封装层130或光学调整层112上。触控感测单元120例如为电容式感应，且较佳具有在可见光范围下透明的性质。在一些实施例中，如图1和图2A～图2B所示，触控感测单元120包括一触控电极层，设置在光学式指纹辨识单元110上。举例来说，可以形成如图2A和图2B所示的单层电极结构，触控电极层包括多个触控电极122/128，触控电极122/128可排列成直交的行列结构，同一轴向的触控电极128可借由连接电极129相互连接；而在同一轴向的触控电极122由架桥结构126相连接，亦即架桥结构126可以设置在介电层124上以连接相邻的触控电极122，触控电极122/128形成相互绝缘，且在相交处形成节点。
在一些实施例中，前述单面形式的触控感测单元的触控电极层可以设置在基板150的上表面152上，并与光学式指纹辨识单元110位于相同层。在一些实施例中，前述单面形式的触控感测单元的触控电极层可以设置在基板150的下表面154上。在一些实施例中，触控感测单元可为一种双面形式的感测组件，其包括一第一触控电极层和一第二触控电极层，第一触控电极层设置在光学式指纹辨识单元110上(位于上表面152上，并与光学式指纹辨识单元110位于相同层)，第二触控电极层设置在基板150的下表面154上。在一些实施例中，双面形式的触控感测单元包括一第一触 控电极层和一第二触控电极层，第一触控电极层设置在光学式指纹辨识单元110上，第二触控电极层设置在第一触控电极层上，两者之间设置绝缘层。
根据一些实施例，触控感测单元可以包括选自氧化铟锡(ITO)、金属网格(metal mesh)、奈米银(silver nanowire,SNW)、奈米碳管(carbon nanotube,CNT)、石墨烯(graphene)、或导电高分子如聚3,4-乙撑二氧噻吩(poly(3,4-ethylenedioxythiophene),PEDOT)的材料，特别是触控电极层可以使用这些材料中的一或更多者来形成。触控感测单元及其触控电极层可以使用其他适合的材料。
光学式指纹辨识单元110和触控感测单元120可以由单一个芯片驱动或由各别的芯片驱动，不须特别限制。
根据一些实施例，触控面板结构100可以更包括一外盖层140。外盖层140可为玻璃、强化玻璃、蓝宝石等，其设置为触控面板结构100的最上层，例如将外盖层140设置在光学式指纹辨识单元110及触控感测单元120之上，也就是用户所接触的位置。可以理解的是，用词「外盖层」是相关领域的惯用术语，具有相同功能但包括或由其他非玻璃的材料形成的覆盖保护层也应被涵盖在其范围内。在一些实施例中，基板150也可作为外盖层140使用，藉以减少材料成本。
在触控面板结构100中，由于光学式指纹辨识单元110的组件如光二极管104和薄膜晶体管102都相当微小，不会对视觉产生影响，所以能够形成实质上透明的光学式指纹辨识单元110。因此，即使将光学式指纹辨识单元110设置在显示单元上，亦即形成屏上式光学指纹辨识单元，也不会产生亮度不均(mura)的问题，亦不需要刻意配合将要组装的显示单元中的像素的位置。可以配合使用透明的材料和类似尺度的微小结构来形成其他层。从而，触控面板结构100可以是透明的，例如可具有80％以上或85％以上的光穿透率。将透明的触控面板结构100贴合组装至显示单元上，只需要一次的贴合组装即可以提供指纹辨识功能和触控功能。
此外，由于光学式指纹辨识单元110是实质上透明的，因此可以放大指纹辨识区所占面积，而不会对视觉产生影响。具体来说，触控感测单元 120具有一面积A1，光学式指纹辨识单元110具有一面积A2，光学式指纹辨识单元110的面积A2可以占触控感测单元120的面积A1的至少1/3，藉此可以让使用者更方便的进行指纹辨识操作，不须受限在微小的指纹辨识区，也可能进行多个指头的指纹辨识以提供更高的数据安全性。更具体地说，依照需求，光学式指纹辨识单元110的面积A2可以占触控感测单元120的面积A1的至少1/3、1/3至1/2、或全部。在触控面板结构100中，光学式指纹辨识单元110的面积A2等于触控感测单元120的面积A1。亦即，触控面板结构100提供全屏式的指纹辨识区。可以理解的是，图1因为绘示成剖面图而使得对于面积A1、A2的指示呈二维延伸，但实际上在垂直纸面方向还存在第三维方向的延伸，具体情况应如图8所绘示者。在其他绘示成剖面图的图式中关于面积的指示亦是类似情况。另外，为了方便说明，图8所绘制的面积A1可代表触控感测单元120所占面积，亦可代表显示器的显示面积。
以下提供触控面板结构的其他示例，以使本领域技术人员更清楚的理解可能的变化。以与上述实施例相同的组件符号表示的组件实质上相同于上述参照图1和图2A～图2B所叙述者。与触控面板结构100相同的组件、特征、和优点将不再赘述。
请参照图3，其绘示例示性的触控面板结构100A。触控面板结构100A与触控面板结构100的不同之处在于光学式指纹辨识单元110并非全屏式的设置，因此在触控面板结构100A定义出指纹辨识区R2和非指纹辨识区R3。指纹辨识区R2具有一面积A2a，亦即光学式指纹辨识单元110具有面积A2a，非指纹辨识区R3具有一面积A3a。根据一些实施例，光学式指纹辨识单元110的面积A2a为触控感测单元120的面积A1的1/3至1/2。
请参照图4，其绘示例示性的触控面板结构100B。触控面板结构100B与触控面板结构100的不同之处在于光学式指纹辨识单元110包括多个指纹辨识区R2a。所述指纹辨识区R2a由非指纹辨识区R3隔离。所有指纹辨识区R2a的面积的总和可以占触控感测单元120的面积A1的至少1/3。在一些实施例中，各个指纹辨识区R2a的面积可以为触控感测单元120 的面积A1的1/3至1/2。
请参照图5，其绘示例示性的触控面板结构100C。触控面板结构100C与触控面板结构100的不同之处在于具有触控感测单元120A。触控感测单元120A包括一第一触控电极层120A1和一第二触控电极层120A2。第一触控电极层120A1设置在光学式指纹辨识单元110上。第二触控电极层120A2设置在基板150的下表面154上。触控感测单元120A所使用的材料和其他特性类似于触控感测单元120，在此不再赘述。在另外的实施例中，光学式指纹辨识单元110所构成的指纹辨识区可具有如图3、图4的变化。
请参照图6，其绘示例示性的触控面板结构100F。触控面板结构100F与触控面板结构100的不同之处在于具有触控感测单元120B，光学式指纹辨识单元110和封装层130因此对应变化。触控感测单元120B包括一触控电极层，所述触控电极层设置在基板150的上表面152上，并与光学式指纹辨识单元110位于相同层。触控感测单元120B所使用的材料和其他特性类似于触控感测单元120，在此不再赘述。在另外的实施例中，触控感测单元120B可为双面形式的感测单元。
可以理解的是，本领域技术人员能够基于上述示例再作出各种变化和调整，在此不再一一列举。以下将重点放在应用根据实施例的触控显示设备。
请参照图7和图8，其分别绘示例示性的触控显示设备10的剖面示意图和俯视示意图。触控显示设备10包括一显示单元200和触控面板结构100。显示单元200具有一显示区。触控面板结构100设置在显示单元200上。触控面板结构100的光学式指纹辨识单元110和触控感测单元120对应地与显示区重迭。具体来说，显示单元200可以但不限于为液晶显示单元(LCD)、有机电致发光显示单元、透明显示单元、或微发光二极管显示单元(μLED display)。一黏着层300可以设置在显示单元200上，以将触控面板结构100贴合组装至显示单元200上，进而提供屏上式的光学式指纹辨识单元110和触控感测单元120。在一些实施例中，为了进一步避免触控面板结构100造成可见性(visibility)的问题，可将触控面板结构100 设置在触控显示设备10的偏光片(未绘示)与显示单元200之间。
由于触控面板结构100同时具有光学式指纹辨识单元110和触控感测单元120，因此只需要一次的贴合组装，即可以提供触控显示设备10的指纹辨识功能和触控功能。并且，由于触控面板结构100是透明的，因此可放大指纹辨识区所占面积。举例来说，触控感测单元120的面积A1可以实质上相同于显示区R的面积，光学式指纹辨识单元110的面积A2可以占显示区R的面积的至少1/3。可以理解的是，虽然图7以触控面板结构100为例，但可以使用根据实施例的其他触控面板结构。
综上所述，虽然本发明已以实施例揭露如上，但其并非用以限定本发明。本领域技术人员在不脱离本发明的精神和范围内，当可作各种变动和润饰。本发明的保护范围以权利要求所限定者为准。

Claims (10)

  1. 一种触控面板结构，包括：
    一基板，具有一上表面和一下表面；以及
    整合设置在所述基板的所述上表面上的一光学式指纹辨识单元及至少一部份的一触控感测单元；
    其中所述触控面板结构是设置于一显示单元的外侧。
  2. 根据权利要求1所述的触控面板结构，其特征在于，所述光学式指纹辨识单元包括多个光发射组件及多个光接收组件；所述光学式指纹辨识单元在可见光范围为透明；或者所述光学式指纹辨识单元对应于所述显示单元的单元画素设置，形成光学不可见。
  3. 根据权利要求1所述的触控面板结构，其特征在于，所述光发射组件包括一光二极管，所述光二极管为PIN型光二极管、有机高分子型光二极管、或异质接面型二极管，且所述光发射组件在可见光范围为透明，或者所述光发射组件设置成对应于所述显示单元的单元画素的矩阵；所述光接收组件包括一薄膜晶体管，所述薄膜晶体管具有非晶硅、多晶硅、单晶硅、金属氧化物、或有机半导体的主动层，且所述光接收组件在可见光范围为透明，所述光接收组件设置成对应于所述显示单元的所述单元画素的矩阵。
  4. 根据权利要求1所述的触控面板结构，其特征在于：
    所述触控感测单元包括：
    一触控电极层，设置在所述光学式指纹辨识单元上；或者
    所述触控感测单元包括：
    一触控电极层，设置在所述基板的所述上表面上，并与所述光学式指纹辨识单元位于相同层。
  5. 根据权利要求1所述的触控面板结构，其特征在于：
    所述触控感测单元包括：
    一第一触控电极层，设置在所述光学式指纹辨识单元上；以及
    一第二触控电极层，设置在所述基板的所述下表面上；或者
    所述触控感测单元包括：
    一第一触控电极层，设置在所述指纹辨识单元上；以及
    一第二触控电极层，设置在所述第一触控电极层上。
  6. 根据权利要求1所述的触控面板结构，其特征在于，更包括：一封装层、一外盖层、或一光学调整层。
  7. 根据权利要求1所述的触控面板结构，其特征在于，所述基板为延迟膜或偏光膜。
  8. 根据权利要求1所述的触控面板结构，其特征在于，所述光学式指纹辨识单元的面积占所述触控感测单元的面积的至少1/3、1/3至1/2、或全部。
  9. 一种触控显示设备，包括：
    一显示单元，具有一显示区；以及
    根据权利要求1至8中任一项所述的触控面板结构，设置在所述显示单元的外侧，其中，所述触控面板结构的所述光学式指纹辨识单元和所述触控感测单元对应地与所述显示区重迭。
  10. 根据权利要求9所述的触控显示设备，其特征在于，所述光学式指纹辨识单元的面积占所述显示区的面积的至少1/3。
PCT/CN2021/075935 2021-02-08 2021-02-08 触控面板结构及包含所述触控面板结构的触控显示设备 WO2022165827A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150120043A (ko) * 2014-04-16 2015-10-27 크루셜텍 (주) 터치 센싱 기능과 지문 인증 기능을 모두 포함하는 모바일 장치
CN105700726A (zh) * 2014-11-27 2016-06-22 林志忠 具指纹辨识的触控面板
CN106055162A (zh) * 2016-06-30 2016-10-26 京东方科技集团股份有限公司 显示组件和显示装置
CN205721719U (zh) * 2016-04-22 2016-11-23 上海与德通讯技术有限公司 显示模组及电子设备
CN108171199A (zh) * 2018-01-12 2018-06-15 京东方科技集团股份有限公司 触控面板及触控装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150120043A (ko) * 2014-04-16 2015-10-27 크루셜텍 (주) 터치 센싱 기능과 지문 인증 기능을 모두 포함하는 모바일 장치
CN105700726A (zh) * 2014-11-27 2016-06-22 林志忠 具指纹辨识的触控面板
CN205721719U (zh) * 2016-04-22 2016-11-23 上海与德通讯技术有限公司 显示模组及电子设备
CN106055162A (zh) * 2016-06-30 2016-10-26 京东方科技集团股份有限公司 显示组件和显示装置
CN108171199A (zh) * 2018-01-12 2018-06-15 京东方科技集团股份有限公司 触控面板及触控装置

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