WO2015096765A1 - 一种触控显示装置及其制备方法 - Google Patents
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Definitions
- the present invention relates to the field of display technologies, and in particular, to an organic light emitting display device having an in-cell touch structure and a method of fabricating the same.
- Touch screen (English full name called Touch Panel), also known as touch screen, touch panel, is an inductive display device that can receive input signals such as contacts, and is widely used in various electronic products. According to the working principle of the touch screen and the medium for transmitting information, the touch screen can be divided into four types: resistive type, capacitive type, infrared type and surface acoustic wave type.
- Capacitive touch screen (English full name Capacitive Touch Panel, referred to as CTP) is the use of human body current sensing to control the screen. According to the change of the capacitance of the detected touch area, the position of the finger is calculated, the accuracy is up to 99%, and the response time is less than 3ms.
- CTP has the advantages of high sensitivity and easy implementation of multi-touch technology, and has gradually become the mainstream touch screen for applications in electronic products such as smart phones and tablet computers.
- the CTP can be divided into: out cell (the touch device is externally mounted on the display panel), the on cell (the touch device is disposed on the display panel), and the in cell.
- Technical architecture such as (the touch device is integrated in the display panel).
- the out cell and on cell technologies are mature, they are widely used in small and medium size display panels, and the OFS in the out cell technology (English called One Film Solution) can be applied to organic electro In the light-emitting display device, a flexible touch display is made possible.
- the in cell can make the display panel lighter and lighter, has higher transmittance, lower power, and can achieve flexibility. It is called the touch display, especially the ultimate solution for organic electroluminescent display touch, and will gradually become The development of touch technology in organic electroluminescent display devices is mainstream.
- Chinese patent CNl01635276A discloses an organic light emitting diode touch panel comprising a substrate, an OLED element, and an optical sensing element. At least one pixel area is defined on the substrate, and a display area and a sensing area are defined in the pixel area.
- the OLED element is disposed on the substrate in the display region, and includes a first thin film transistor, a light emitting lower electrode portion, a patterned organic light emitting layer, and a light emitting upper electrode portion.
- the light-emitting lower electrode portion is disposed on the light-emitting upper electrode portion and electrically connected to the first thin film transistor.
- the patterned organic light-emitting layer is disposed on the light-emitting lower electrode portion.
- the light emitting upper electrode portion is disposed on the patterned organic light emitting layer.
- the optical sensing element is disposed on the substrate in the sensing region, and includes a second thin film transistor, a photosensitive lower electrode portion, a patterned photosensitive dielectric layer, and a photosensitive upper electrode portion.
- the photosensitive lower electrode portion is disposed on the second thin film transistor and electrically connected to the second thin film transistor.
- the patterned photosensitive dielectric layer is disposed on the photosensitive lower electrode portion, and the photosensitive upper electrode portion is disposed on the patterned photosensitive dielectric layer.
- the patent has high sensitivity, but it is an in-cell type optical touch method. It is not only complicated in structure and preparation process, but also difficult to implement multi-touch, and is not a mainstream touch technology.
- the present invention solves the problem that the in-cell type touch technology structure and the preparation process are complicated in the prior art, and provides an organic light-emitting display device with a simple structure and a simple structure and an in-cell touch structure. Preparation.
- a touch display device includes a substrate, a plurality of organic light emitting diodes disposed on the substrate, the organic light emitting diodes including a first electrode, an organic material layer and a second electrode which are sequentially stacked;
- the first electrodes are independently disposed;
- the second electrodes are respectively connected in series to form a plurality of first conductive strips arranged in parallel and a plurality of second conductive strips arranged in parallel, wherein the first conductive strips and the second conductive strips form an insulated cross between each other The internet.
- the first conductive strip is formed in series by the second electrode arranged in a first direction; the second conductive strip is disposed on the organic light by the second electrode arranged along a second side Conductive bridges outside the diode are formed in series.
- the conductive bridge is disposed on the substrate and insulated from the organic light emitting diode by an insulating layer directly covering the conductive bridge.
- the conductive bridge is a metal conductive bridge.
- the conductive bridge has a thickness of 10 nm to 1000 nm.
- a pixel defining layer that is adjacent to the adjacent organic light emitting diode is further disposed on the substrate.
- the pixel defining layer is further directly provided with an isolation pillar layer separating the first conductive strip and the second conductive strip.
- the second electrode has a thickness of 1 nm to 500 nm.
- the method further includes a plurality of driving thin film transistors disposed on the substrate, each of the first electrodes being in contact connection with a source or a drain of each of the driving thin film transistors.
- the method for preparing the touch device of the present invention comprises the following steps:
- the method further includes the step of forming a pixel defining layer surrounding the first electrode on the substrate.
- the step S3 further includes the step of forming an isolation pillar layer on the pixel defining layer; the adjacent first conductive strip and the second conductive strip formed in the step S4 are separated by the isolation pillar layer.
- the angle between the axial direction of the through hole and the substrate in step S2 is 10° to 90°.
- a touch display device comprising: a substrate; an organic light emitting diode disposed on the substrate, wherein the first electrodes are independently disposed; and the second electrodes are respectively connected in series to form a plurality of first conductive strips arranged in parallel And a plurality of second conductive strips arranged in parallel, the first conductive strip and the second conductive strip forming a cross-network insulated from each other. While forming the second electrode, the second electrodes are respectively connected in series in the lateral direction and the longitudinal direction to form an insulated side crossing network, that is, a touch sensing layer is formed, and the touch function is integrated in the second electrode of the organic light emitting diode.
- the structure is simple; moreover, multi-touch can be realized.
- a touch display device integrates a touch function into the organic light emitting diode, and does not need to additionally provide a touch component, and has high luminous efficiency and fast corresponding speed.
- the method for preparing a touch display device according to the present invention wherein the second electrode is prepared to be connected in series in a horizontal direction and a vertical direction, respectively, and the lithography and etching are completed by the process while completing the preparation of the organic light emitting diode.
- the process can be integrated with a touch function, the preparation method is simple, and the process cost is low.
- FIG. 1 is a schematic structural diagram of a touch display device according to Embodiment 1 of the present invention.
- Reference numerals in the figures are denoted as: 100-substrate, 101-insulating layer, 102-first electrode, 103-organic material layer, 104-second electrode in the second conductive strip, 105-first in the first conductive strip Two electrodes, 106-isolated pillar layer, 107-via, 108-conductive bridge, 109-package layer, 110-pixel defining layer.
- the embodiment provides a touch display device.
- the substrate 100 includes an organic light emitting diode disposed on the substrate 100 , and the first electrodes 102 are independently disposed.
- the second electrodes 104 and 105 are respectively connected in series. a plurality of first conductive strips arranged in parallel and a plurality of second conductive strips arranged in parallel, the first conductive strips and the second conductive strips forming a cross-network insulated from each other.
- the first conductive strip is formed in series by the second electrode 105 arranged in a first direction; the second conductive strip is disposed by the second electrode 104 arranged along the second side Conductive bridges outside the organic light emitting diode are formed in series.
- the conductive bridge 108 is disposed in the insulating layer 101 between the substrate 100 and the organic light emitting diode, and the conductive bridge 108 is selected from, but not limited to, a single layer or a plurality of layers of conductive polymers or molybdenum, aluminum, titanium, A metal such as tungsten or an alloy film thereof is preferably a multilayer metal conductive bridge, and in this embodiment, a three-layer metal film of molybdenum/aluminum/molybdenum which is sequentially stacked is more preferable.
- the molybdenum/aluminum/molybdenum in the conductive bridge 108 is 50 nm/250 nm/50 nm, respectively.
- the thickness of the conductive bridge 108 may also be 10 nm to 1000 nm, and the present invention can be realized. The purpose of the present invention falls within the scope of protection of the present invention.
- the insulating layer 101 is selected from, but not limited to, one or more stacked layers of silicon nitride, silicon oxide, silicon oxynitride, aluminum oxide, etc., and this embodiment is preferably a single layer silicon nitride layer.
- the material and thickness of the first electrode 102, the organic material layer 103, and the second electrode of the present invention are the same as those in the prior art, wherein the thickness of the second electrode is preferably from 1 nm to 500 nm.
- the first electrode 102 is a sequentially stacked ITO/Ag/ITO layer having a thickness of 15 nm/110 nm/7 nm; the material layer 103 includes a light-emitting layer and a hole injection layer, a hole transport layer, and an electron.
- the organic material layer 103 in the present embodiment includes hole transport arranged in a stack
- the layer, the light-emitting layer and the electron transport layer have a total thickness of 200 nm
- the second electrode is Ag and has a thickness of 5 nm.
- the substrate 100 is further provided with a pixel defining layer 110 for isolating adjacent the organic light emitting diodes, and the pixel defining layer 110 is further directly provided with a partitioning adjacent the first conductive strips and the second conductive strips.
- the column layer 106 is isolated.
- the isolation pillar 106 separating the second electrode into the first conductive strip and the second conductive strip is preferably a polyimide layer having a height of 0.1 ⁇ m to 5 ⁇ m. It is preferably 1 ⁇ m and has a width of 1 ⁇ m.
- the isolation pillars 106 may be prepared from other insulating materials, and the isolation pillars 106 may not be disposed between the second electrodes to ensure adjacent first conductive strips and the first The purpose of the present invention can be achieved by insulating the two conductive strips, and is within the scope of protection of the present invention.
- the touch display device of the present embodiment is an active matrix organic light emitting display device, and further includes a plurality of driving thin film transistors disposed on the substrate 100, and the source of each of the first electrodes 102 and each of the driving thin film transistors Or drain contact connection.
- the touch display device of the present invention is preferably a top emission organic light emitting display device, that is, the second electrode 102 is a transparent electrode.
- the second electrodes 104 and 105 are further provided with an encapsulation layer 109, and the encapsulation layer 109 comprises one or more layers of organic thin films and/or inorganic thin films which are alternately disposed, and the inorganic thin film is selected from the group consisting of However, it is not limited to a film such as silicon nitride or silicon oxide, and the organic film is selected from films such as an ultraviolet curing resin and a silica-acrylic resin composite material.
- the encapsulation layer 109 is preferably four pairs of alternatingly deposited polyacrylate layer and aluminum oxide layer, the polyacrylate layer has a film thickness of 1.5 microns, and the aluminum oxide layer has a film thickness of 50 nm.
- the second electrode is configured to be connected in series in a horizontal direction and a vertical direction, respectively, to form an insulated side crossing network, and a touch sensing layer is formed while forming the second electrode.
- the touch function is integrated in the organic light emitting diode, and the structure is simple. Moreover, the touch function is integrated in the organic light emitting diode, and the touch component is not required to be additionally disposed, and the light emitting efficiency is high and the corresponding speed is fast.
- the method for preparing the touch device includes the following steps:
- S1 forming a first conductive layer on the substrate 101 by a sputtering process, and patterning a plurality of continuous conductive strips disposed in a longitudinal direction, that is, forming the conductive bridge 108.
- the first conductive layer may also be patterned to form a conductive bridge 108 in the form of a wire, and the wire or the conductive strip may also be discontinuous.
- the through hole 107 of the same conductive bridge 108 is passed through.
- the through hole 107 has an angle of 50° with the substrate 100.
- the through hole may also be subjected to laser ablation, ion beam etching, electron beam etching, and the like.
- the angle between the axial direction of the through hole 107 and the substrate 100 may be any angle of 10° to 90°, and the object of the present invention can be achieved, and belongs to the protection scope of the present invention.
- the second conductive layer can also be prepared by a process such as CVD, electrochemical deposition, or the like, and the object of the present invention can be achieved, and belongs to the protection scope of the present invention.
- a pixel defining layer 110 covering the first electrode 102 is formed on a substrate by a coating process, and patterned by a photolithography process to expose the first electrode 102 and the via 107.
- An isolation pillar layer 106 is then formed on the pixel defining layer 110 by a coating and photolithography process.
- An organic material layer 103 is formed on the first electrode 102 by a fine mask evaporation process.
- the two electrodes 104, the second electrode 104 and the second electrode 105 are naturally separated by a layer of spacers 106 of negative angle.
- the second electrode 105 is formed in series to form a first conductive strip, and a material forming the second electrode is filled in the through hole 107 and electrically connected to the conductive bridge 108, so that the second electrode 104 can be along the first
- the two directions are connected in series to form a second conductive strip.
- the step S4 further includes the step of preparing an encapsulation layer 109 covering the second electrodes 104 and 105 on the substrate 100, and the specific implementation is the same as the prior art.
- the second electrode is prepared to be connected in series in the horizontal and vertical directions, and the integrated photolithography process can be integrated through the mature photolithography process. It has touch function, simple preparation method and low process cost.
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Abstract
Description
Claims (13)
- 一种触控显示装置,包括基板、设置在基板上的多个有机发光二极管,所述有机发光二极管包括依次堆叠设置的第一电极、有机材料层和第二电极;其特征在于,所述第一电极独立设置;所述第二电极分别串联形成若干平行排列的第一导电条和若干平行排列的第二导电条,所述第一导电条与所述第二导电条形成彼此绝缘的交叉网络。
- 根据权利要求1所述的触控显示装置,其特征在于,所述第一导电条由沿第一方向排布的所述第二电极同层串联形成;所述第二导电条由沿第二方排布的所述第二电极通过设置在所述有机发光二极管外部的导电桥进行串联形成。
- 根据权利要求2所述的触控显示装置,其特征在于,所述导电桥设置在所述基板上,并通过直接覆盖在所述导电桥上的绝缘层与所述有机发光二极管绝缘。
- 根据权利要求3所述的触控显示装置,其特征在于,所述导电桥为金属导电桥。
- 根据权利要求3所述的触控显示装置,其特征在于,所述导电桥的厚度为10nm~1000nm。
- 根据权利要求1所述的触控显示装置,其特征在于,所述基板上还设置有隔离相邻所述有机发光二极管的像素限定层。
- 根据权利要求6所述的触控显示装置,其特征在于,所述像素限定层上还直接设置有分隔相邻所述第一导电条与所述第二导电条的隔离柱层。
- 根据权利要求1-7任一所述的触控显示装置,其特征在于,所述第二电极的厚度为1nm~500nm。
- 根据权利要求1-7任一所述的触控显示装置,其特征在于,还包括设置在所述基板上的若干驱动薄膜晶体管,各所述第一电极与各所述驱动薄膜晶 体管的源极或漏极接触连接。
- 一种权利要求1-9任一所述的触控装置的制备方法,其特征在于,包括如下步骤:S1、在基板上形成第一导电层,并图案化形成多个沿第二方向平行设置的导电桥;S2、在基板上形成覆盖导电桥的绝缘层,在绝缘层中设置导通导电桥的通孔;S3、在绝缘层上直接形成彼此独立的第一电极、在各第一电极上形成有机材料层;S4、在有机材料层上形成第二电极,沿第一方向排布的若干第二电极同层串联,形成多个平行排列的第一导电条,沿第二方向排布的若干第二电极通过通孔与导电桥进行串联,形成多个平行排列的第二导电条,所述第一导电条与所述第二导电条形成彼此绝缘的交叉网络。
- 根据权利要求10所述的触控装置的制备方法,其特征在于,步骤S3中形成所述第一电极后,还包括在所述基板上形成环绕所述第一电极的像素限定层的步骤。
- 根据权利要求11所述的触控装置的制备方法,其特征在于,步骤S3中还包括在所述像素限定层上形成隔离柱层的步骤;步骤S4中形成的相邻所述第一导电条与所述第二导电条由所述隔离柱层隔开。
- 根据权利要求10所述的触控装置的制备方法,其特征在于,步骤S2中所述通孔的轴向与所述基板的夹角为10°~90°。
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JP2016559490A JP6246387B2 (ja) | 2013-12-27 | 2014-12-25 | タッチ表示装置およびその製造方法 |
EP14874008.7A EP3088999A4 (en) | 2013-12-27 | 2014-12-25 | Touch control display device and preparation method therefor |
US15/107,285 US10185430B2 (en) | 2013-12-27 | 2014-12-25 | Touch control display device and a preparation method thereof |
KR1020167018881A KR101891819B1 (ko) | 2013-12-27 | 2014-12-25 | 터치 컨트롤 디스플레이장치 및 그 제조 방법 |
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KR20160098403A (ko) | 2016-08-18 |
KR101891819B1 (ko) | 2018-08-24 |
EP3088999A1 (en) | 2016-11-02 |
CN104750284A (zh) | 2015-07-01 |
US20170003800A1 (en) | 2017-01-05 |
TWI562355B (zh) | 2016-12-11 |
TW201526225A (zh) | 2015-07-01 |
JP6246387B2 (ja) | 2017-12-13 |
US10185430B2 (en) | 2019-01-22 |
EP3088999A4 (en) | 2017-01-04 |
JP2017503292A (ja) | 2017-01-26 |
CN104750284B (zh) | 2019-02-19 |
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