CN112596639A - 触控显示装置 - Google Patents

触控显示装置 Download PDF

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CN112596639A
CN112596639A CN202011024048.8A CN202011024048A CN112596639A CN 112596639 A CN112596639 A CN 112596639A CN 202011024048 A CN202011024048 A CN 202011024048A CN 112596639 A CN112596639 A CN 112596639A
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touch
display device
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杨镇玮
林政男
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Raydium Semiconductor Corp
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    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/04164Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
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    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10OLED displays
    • H10K59/12Active-matrix OLED [AMOLED] displays
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40OLEDs integrated with touch screens
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/50OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements

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Abstract

本发明公开一种触控显示装置,包括触控显示面板、薄膜覆晶层及驱动电路。触控显示面板包括显示模块及触控感测器。触控感测器设置于显示模块上。薄膜覆晶层包括彼此相连的连接部与延伸部。连接部耦接显示模块且延伸部耦接触控感测器。驱动电路设置于薄膜覆晶层上。驱动电路通过薄膜覆晶层及其延伸部来与触控感测器进行触控信号的传输。

Description

触控显示装置
技术领域
本发明是与显示装置有关,尤其是关于一种触控显示装置。
背景技术
于现有技术中,当应用于穿戴式(Wearable)触控显示装置的On-Cell触控显示面板搭配采用薄膜覆晶(Chip On Film,COF)封装的触控与显示驱动器整合(Touch andDisplay Driver Integration,TDDI)集成电路时,由于On-Cell触控显示面板的触控感测器(Touch Sensor)接点位于上板玻璃,而采用薄膜覆晶(COF)封装的触控与显示驱动器整合(TDDI)集成电路贴合位置则位于显示模块的下板玻璃,因此,两者之间还需额外通过触控用的软性印刷电路板(Flexible Printed Circuit,FPC)耦接,以使得触控与显示驱动器整合(TDDI)集成电路与触控感测器之间能进行触控信号的传输能与Sensor连接。
目前常用的方式可分为触控用的软性印刷电路板(FPC)与采用薄膜覆晶(COF)封装的触控与显示驱动器整合(TDDI)集成电路同侧耦接与异侧耦接两种,分别说明如下:
(1)如图1所示,于On-Cell触控显示面板1A中,设置于封装层ENC上的触控感测器TS耦接触控用的软性印刷电路板FPCT且触控用的软性印刷电路板FPCT是与设置于覆晶薄膜层COF上的触控与显示驱动器整合集成电路TDDI同侧。由于覆晶薄膜层COF与触控用的软性印刷电路板FPCT可能重叠,且触控用的软性印刷电路板FPCT的两侧需分别贴合于封装层ENC及主软性印刷电路板FPCM,因此,当触控用的软性印刷电路板FPCT考量到弯曲至背面时的曲率时,其所需长度较长而导致对位不易且增加贴合难度而影响贴合良率。此外,如图3所示,触控感测器TS的走线需依序经过触控用的软性印刷电路板FPCT、主软性印刷电路板FPCM及覆晶薄膜层COF才会耦接至触控与显示驱动器整合集成电路TDDI,使得走线的长度过长,容易造成信号衰减及噪声干扰,亟待克服。再者,考量到触控用的软性印刷电路板的间距(Pitch)限制,当On-Cell触控显示面板1A为圆形时,由于触控贴合区所需的宽度较宽(例如图4中的触控用的软性印刷电路板FPCT的触控贴合区的宽度d1为200um),亦会影响圆形面板的玻璃边框宽度。
(2)如图2所示,于On-Cell触控显示面板1B中,设置于封装层ENC上的触控感测器TS耦接触控用的软性印刷电路板FPCT且触控用的软性印刷电路板FPCT是与设置于覆晶薄膜层COF上的触控与显示驱动器整合集成电路TDDI异侧,使得触控用的软性印刷电路板FPCT需通过连接器来耦接至主软性印刷电路板FPCM,导致成本增加。此外,如图3所示,触控感测器TS的走线需依序经过触控用的软性印刷电路板FPCT、主软性印刷电路板FPCM及覆晶薄膜层COF才会耦接至触控与显示驱动器整合集成电路TDDI,使得走线的长度过长,容易造成信号衰减及噪声干扰,亟待克服。
发明内容
有鉴于此,本发明提出一种触控显示装置,以有效解决现有技术所遭遇到的上述问题。
依据本发明的一具体实施例为一种触控显示装置。于此实施例中,触控显示装置包括触控显示面板、薄膜覆晶层及驱动电路。触控显示面板包括显示模块及触控感测器。触控感测器设置于显示模块上。薄膜覆晶层包括彼此相连的连接部与延伸部。连接部耦接显示模块且延伸部耦接触控感测器。驱动电路设置于薄膜覆晶层上。驱动电路通过薄膜覆晶层及其延伸部来与触控感测器进行触控信号的传输。
于一实施例中,触控显示面板为On-cell触控显示面板。
于一实施例中,触控感测器适用于互电容触控感测及自电容触控感测。
于一实施例中,显示模块包括有机发光二极管(OLED)发光层。
于一实施例中,驱动电路为触控与显示驱动器整合(TDDI)集成电路。
于一实施例中,驱动电路通过薄膜覆晶层的连接部来与显示模块之间进行显示信号的传输。
于一实施例中,触控显示面板的形状为圆形、椭圆形或弧形。
于一实施例中,延伸部的宽度小于连接部的宽度。
于一实施例中,延伸部是由连接部的中央向触控感测器延伸。
于一实施例中,延伸部是由连接部的侧边向触控感测器延伸。
于一实施例中,触控感测器的至少一触控走线依序经由延伸部、薄膜覆晶层而耦接至驱动电路。
于一实施例中,显示模块的至少一显示走线依序经由连接部、薄膜覆晶层而耦接至主软性印刷电路板。
于一实施例中,显示模块的至少一显示走线依序经由连接部、薄膜覆晶层并穿过驱动电路后,再耦接至主软性印刷电路板。
于一实施例中,延伸部的宽度为18至20um。
于一实施例中,延伸部包括触控感测接脚,用以耦接触控感测器。
相较于现有技术,根据本发明的触控显示装置是通过设置有触控与显示驱动器整合(TDDI)集成电路的薄膜覆晶层(COF)延伸其触控走线区来与On-cell触控显示面板的触控感测器耦接,由以取代传统上与On-cell触控显示面板的触控感测器耦接的软性印刷电路板(FPC),不仅可降低成本并提升贴合良率,且触控走线从触控感测器经由薄膜覆晶层(COF)至触控与显示驱动器整合(TDDI)集成电路的距离短,信号衰减小且不易受噪声干扰,此外,由于薄膜覆晶层(COF)与触控感测器的贴合区域宽度仅为18至20um远小于传统的软性印刷电路板(FPC)与触控感测器的贴合区域宽度为200um,故亦可有效改善对于圆形面板的玻璃边框宽度的影响。
关于本发明的优点与精神可以通过以下的发明详述及所附图式得到进一步的了解。
附图说明
图1为现有技术中的触控用的软性印刷电路板(FPC)与采用薄膜覆晶(COF)封装的触控与显示驱动器整合(TDDI)集成电路同侧耦接的示意图。
图2为现有技术中的触控用的软性印刷电路板(FPC)与采用薄膜覆晶(COF)封装的触控与显示驱动器整合(TDDI)集成电路异侧耦接的示意图。
图3为现有技术中的触控感测器的走线需依序经过触控用的软性印刷电路板、主软性印刷电路板及覆晶薄膜才会耦接至触控与显示驱动器整合集成电路的示意图。
图4为现有技术中的触控用的软性印刷电路板所需的触控贴合区宽度较宽(例如d1为200um)影响圆形面板的玻璃边框宽度的示意图。
图5为根据本发明的一较佳具体实施例中的薄膜覆晶层COF的延伸部P2耦接触控感测器TS的示意图。
图6及图7分别为薄膜覆晶层COF的延伸部P2由连接部P1的中央及侧边向触控感测器TS延伸的不同实施例。
图8为根据本发明的另一较佳具体实施例中的薄膜覆晶层COF的一端通过延伸部P2耦接触控感测器TS且其另一端耦接主软性印刷电路板FPCM的示意图。
图9为根据本发明的另一较佳具体实施例中的薄膜覆晶层COF的延伸部P2的宽度较小(例如d2为18至20um)而不会影响圆形面板的玻璃边框宽度的示意图。
图10A为薄膜覆晶层的连接部P1及延伸部P2分别位于左右两侧且延伸部P2通过触控走线TR1~TR2耦接驱动电路TDDI的示意图。
图10B为图10A中的驱动电路TDDI的背面的示意图。
图11A为薄膜覆晶层的连接部P1位于左右两侧而延伸部P2位于中央且延伸部P2通过触控走线TR1~TR2耦接驱动电路TDDI的示意图。
图11B为图11A中的驱动电路TDDI的背面的示意图。
主要元件符号说明:
1A 触控显示面板
1B 触控显示面板
CL 保护盖板
OCA 光学胶层
POL 极化层
ENC 封装层
CA 阴极
OLED 有机发光二极管
AN 阳极
SUB 基板
FPCT触控用的软性印刷电路板
FPCM 主软性印刷电路板
PL 触控显示面板
TS 触控感测器
DS 显示模块
COF 薄膜覆晶层
TDDI驱动电路
P1 连接部
P2 延伸部
d1 厚度
d2 厚度
d3 厚度
TR1 触控走线
TR2 触控走线
EL1 显示走线
EL2 显示走线
PIN 触控接脚
DS1~DS2 显示模块
DM 假焊垫
具体实施方式
现在将详细参考本发明的示范性实施例,并在附图中说明所述示范性实施例的实例。在图式及实施方式中所使用相同或类似标号的元件/构件是用来代表相同或类似部分。
依据本发明的一具体实施例为一种触控显示装置。于此实施例中,触控显示装置可应用于穿戴式(Wearable)装置,其可包括具有On-cell触控感测架构的有机发光二极管(OLED)面板以及触控与显示驱动器整合(TDDI)集成电路,且可适用于各种不同的触控感测技术,例如互电容触控感测及自电容触控感测,但不以此为限。
请参照图5,图5为此实施例中的触控显示装置的示意图。
如图5所示,触控显示装置包括触控显示面板PL、薄膜覆晶层COF及驱动电路TDDI。触控显示面板PL包括显示模块DS及触控感测器TS。触控感测器TS设置于显示模块DS上。驱动电路TDDI设置于薄膜覆晶层COF上,亦即驱动电路TDDI系采用薄膜覆晶(COF)封装结构。
薄膜覆晶层COF包括彼此相连的连接部P1及延伸部P2。连接部P1耦接显示模块DS。延伸部P2由连接部P1向触控感测器TS延伸而与触控感测器TS耦接。由此,驱动电路TDDI可通过薄膜覆晶层COF及其延伸部P2耦接触控感测器TS,使得驱动电路TDDI能与触控感测器TS进行触控信号的传输。同理,驱动电路TDDI亦可通过薄膜覆晶层COF及其连接部P1耦接显示模块DS,使得驱动电路TDDI能与显示模块DS进行显示信号的传输。
于实际应用中,显示模块DS可包括有机发光二极管(OLED)发光层、阴极层及阳极层;驱动电路TDDI可为触控与显示驱动器整合(TDDI)集成电路;薄膜覆晶层COF的延伸部P2可包括触控感测接脚,用以耦接触控感测器TS,但不以此为限。
接下来,请参照图6及图7。图6及图7分别为薄膜覆晶层COF的延伸部P2由连接部P1的中央及侧边朝向触控感测器TS延伸的不同实施例。
如图6所示,触控显示面板PL的形状为圆形,驱动电路TDDI设置于薄膜覆晶层COF上且薄膜覆晶层COF的延伸部P2是由连接部P1的中央朝向触控显示面板PL的触控感测器TS延伸而与触控感测器TS耦接。
需说明的是,薄膜覆晶层COF的连接部P1及延伸部P2分别耦接触控显示面板PL的显示模块DS及触控感测器TS,且图6中的延伸部P2的宽度d2会小于连接部P1的宽度d。
同理,如图7所示,触控显示面板PL的形状为圆形,驱动电路TDDI设置于薄膜覆晶层COF上且薄膜覆晶层COF的延伸部P2是由连接部P1的侧边朝向触控显示面板PL的触控感测器TS延伸而与触控感测器TS耦接。
需说明的是,薄膜覆晶层COF的连接部P1及延伸部P2分别耦接触控显示面板PL的显示模块DS及触控感测器TS,且图7中的延伸部P2的宽度d3会小于连接部P1的宽度d。
于实际应用中,触控显示面板PL的形状亦可以是椭圆形、弧形或其他形状,并无特定的限制。
请参照图8,于另一实施例中,薄膜覆晶层COF的一端通过延伸部P2耦接触控感测器TS且其另一端耦接主软性印刷电路板FPCM。因此,驱动电路TDDI除了可以通过薄膜覆晶层COF及其延伸部P2来与触控感测器TS进行触控信号的传输之外,驱动电路TDDI还可通过薄膜覆晶层COF来与主软性印刷电路板FPCM进行信号传输。
请参照图9,于另一实施例中,相较于现有技术中的触控用的软性印刷电路板FPCT的宽度d1约为200um(见图4),薄膜覆晶层COF的延伸部P2的宽度d2约为18至20um,明显较小,故不会影响圆形的触控显示面板PL的玻璃边框宽度。
请参照图10A,于另一实施例中,触控显示面板PL的触控感测器TS及显示模块DS分别位于左右两侧。触控感测器TS的触控走线TR1~TR2经由薄膜覆晶层COF耦接至驱动电路TDDI。显示模块DS的显示走线EL2经由薄膜覆晶层COF耦接至主软性印刷电路板FPCM而其显示走线EL1经由薄膜覆晶层COF并穿过驱动电路TDDI后才耦接至主软性印刷电路板FPCM。
图10B则是为图10A中的驱动电路TDDI的背面的示意图。如图10B所示,显示模块DS的显示走线EL1是从驱动电路TDDI的背面穿过,而触控感测器TS的触控走线TR1~TR2则经由位于驱动电路TDDI的背面的假焊垫DM耦接至位于驱动电路TDDI的背面两侧的触控接脚PIN,以连接至触控感测器TS。
请参照图11A,于另一实施例中,触控显示面板PL的显示模块DS1~DS2位于左右两侧且触控感测器TS位于中央。触控感测器TS的触控走线TR1~TR2经由薄膜覆晶层COF耦接至驱动电路TDDI。显示模块DS1~DS2的显示走线EL1~EL2经由薄膜覆晶层COF耦接至主软性印刷电路板FPCM。
图11B则是为图11A中的驱动电路TDDI的背面的示意图。如图11B所示,触控感测器TS的触控走线TR1~TR2经由位于驱动电路TDDI的背面的假焊垫DM耦接至位于驱动电路TDDI的背面两侧的触控接脚PIN,以连接至触控感测器TS。
相较于现有技术,根据本发明的触控显示装置是通过设置有触控与显示驱动器整合(TDDI)集成电路的薄膜覆晶层(COF)延伸其触控走线区来与On-cell触控显示面板的触控感测器耦接,由以取代传统上与On-cell触控显示面板的触控感测器耦接的软性印刷电路板(FPC),不仅可降低成本并提升贴合良率,且触控走线从触控感测器经由薄膜覆晶层(COF)至触控与显示驱动器整合(TDDI)集成电路的距离短,信号衰减小且不易受噪声干扰,此外,由于薄膜覆晶层(COF)与触控感测器的贴合区域宽度仅为18至20um远小于传统的软性印刷电路板(FPC)与触控感测器的贴合区域宽度为200um,故亦可有效改善对于圆形面板的玻璃边框宽度的影响。

Claims (15)

1.一种触控显示装置,包括:
一触控显示面板,包括:一显示模块;以及一触控感测器,设置于该显示模块上;
一薄膜覆晶层,包括彼此相连的一连接部与一延伸部,其中该连接部耦接该显示模块且该延伸部耦接该触控感测器;以及
一驱动电路,设置于该薄膜覆晶层上;
其中,该驱动电路通过该薄膜覆晶层及该延伸部来与该触控感测器进行触控信号的传输。
2.如权利要求1所述的触控显示装置,其特征在于,该触控显示面板为On-cell触控显示面板。
3.如权利要求1所述的触控显示装置,其特征在于,该触控感测器适用于互电容触控感测及自电容触控感测。
4.如权利要求1所述的触控显示装置,其特征在于,该显示模块包括一有机发光二极管发光层。
5.如权利要求1所述的触控显示装置,其特征在于,该驱动电路为触控与显示驱动器整合集成电路。
6.如权利要求1所述的触控显示装置,其特征在于,该驱动电路通过该薄膜覆晶层及该连接部来与该显示模块之间进行显示信号的传输。
7.如权利要求1所述的触控显示装置,其特征在于,该触控显示面板的形状为圆形、椭圆形或弧形。
8.如权利要求1所述的触控显示装置,其特征在于,该延伸部的宽度小于该连接部的宽度。
9.如权利要求1所述的触控显示装置,其特征在于,该延伸部系由该连接部的中央向该触控感测器延伸。
10.如权利要求1所述的触控显示装置,其特征在于,该延伸部是由该连接部的侧边向该触控感测器延伸。
11.如权利要求1所述的触控显示装置,其特征在于,该触控感测器的至少一触控走线依序经由该延伸部、该薄膜覆晶层而耦接至该驱动电路。
12.如权利要求1所述的触控显示装置,其特征在于,该显示模块的至少一显示走线依序经由该连接部、该薄膜覆晶层而耦接至一主软性印刷电路板。
13.如权利要求1所述的触控显示装置,其特征在于,该显示模块的至少一显示走线依序经由该连接部、该薄膜覆晶层并穿过该驱动电路后,再耦接至一主软性印刷电路板。
14.如权利要求1所述的触控显示装置,其特征在于,该延伸部的宽度为18至20um。
15.如权利要求1所述的触控显示装置,其特征在于,该延伸部包括触控感测接脚,用以耦接该触控感测器。
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