WO2017080226A1 - 一种具有压感触控功能的显示装置及驱动方法 - Google Patents

一种具有压感触控功能的显示装置及驱动方法 Download PDF

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Publication number
WO2017080226A1
WO2017080226A1 PCT/CN2016/087688 CN2016087688W WO2017080226A1 WO 2017080226 A1 WO2017080226 A1 WO 2017080226A1 CN 2016087688 W CN2016087688 W CN 2016087688W WO 2017080226 A1 WO2017080226 A1 WO 2017080226A1
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Prior art keywords
electrode
pressure
pressure sensitive
display device
value
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PCT/CN2016/087688
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English (en)
French (fr)
Inventor
李昌峰
杨盛际
陈小川
王海生
丁小梁
刘英明
刘伟
赵卫杰
王鹏鹏
王磊
卢鹏程
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Priority to EP16808548.8A priority Critical patent/EP3376353B1/en
Priority to US15/321,914 priority patent/US9904399B2/en
Publication of WO2017080226A1 publication Critical patent/WO2017080226A1/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
    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • 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
    • G06F3/0445—Digitisers, 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
    • 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
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position

Definitions

  • the present disclosure relates to a display device and a driving method having a pressure sensitive touch function.
  • OLED organic light emitting diode
  • the force touch function is mainly realized by setting an additional mechanism in the display.
  • Apple released a touch device with a pressure-sensitive touch function which is implemented by placing a gravity sensing device at each of the four corners of the touch device to achieve light, medium and heavy Pressure recognition function.
  • An embodiment of the present disclosure provides a display device having a pressure sensitive touch function, including a display panel and a pressure sensitive electrode, the display panel including a first electrode, a second electrode, and a location disposed on the first substrate An organic material functional layer between the first electrode and the second electrode, wherein the pressure sensitive electrode is disposed on a side of the first electrode away from the functional layer of the organic material, and the pressure sensitive electrode and the There is a gap between the display panels; the projection of the pressure sensitive electrode and the first electrode on the first substrate has an overlapping area.
  • Another embodiment of the present disclosure provides a driving method of the above display device, comprising: inputting a fixed voltage signal to the first electrode, inputting a driving signal to the pressure sensing electrode, and inputting the voltage from the pressure sensing stage
  • the sensing electrode receives the feedback signal to obtain a touch position and a capacitance value, and obtains a pressure value according to the capacitance value; comparing the pressure value and the pre-stored standard pressure range, In the case where the pressure value is within one of the standard pressure ranges, the function of the display device corresponding to the range is turned on.
  • FIG. 1a is a schematic structural diagram of a display device with a pressure sensitive touch function according to an embodiment of the present disclosure
  • Figure 1b is a cross-sectional view taken along line AA of Figure 1a;
  • FIG. 2 is a schematic structural diagram of another display device with a pressure sensitive touch function according to an embodiment of the present disclosure
  • Figure 2b is a cross-sectional view taken along line BB of Figure 2a;
  • FIG. 3 is a schematic structural diagram of still another display device with a pressure sensitive touch function according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flow chart of a driving method of a display device with a pressure sensitive touch function according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a correspondence between charging time and voltage value according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram showing another correspondence between charging voltage and voltage value according to an embodiment of the present disclosure.
  • the embodiment of the present disclosure provides a display device 01 having a pressure sensitive touch function.
  • the display device 01 includes a display panel 02, and the display panel 02 includes a first lining.
  • the display panel 02 further includes a pressure sensitive electrode 50; the pressure sensitive electrode 50 is disposed on a side of the first electrode 20 away from the organic material functional layer 30, and has a gap 60 between the pressure sensitive electrode 50 and the display panel 02.
  • the projection of the pressure sensitive electrode 50 and the first electrode 20 on the first base substrate 10 has an overlapping area.
  • the principle of implementing the pressure sensitive touch is that since the projection of the pressure sensitive electrode 50 and the first electrode 20 on the first base substrate 10 has an overlapping area, and the pressure sensitive electrode 50 has a spacing between the first electrode 20, therefore, according to Parallel plate capacitance formula, ie It can be seen that a capacitance (C) can be generated between the pressure sensitive electrode 50 and the first electrode 20.
  • ⁇ is a constant
  • S is an overlapping area between the pressure sensitive electrode 50 and the first electrode 20
  • d is a distance between the pressure sensitive electrode 50 and the first electrode 20.
  • the display panel 02 includes a plurality of sub-pixel units, each of which includes a first electrode 20, an organic material functional layer 30, and a second electrode 40.
  • the organic material functional layer 30 which may include at least a light emitting layer, in order to improve the efficiency of electron and hole injection into the light emitting layer, the organic material functional layer 30 may further include an electron transport layer, a hole transport layer, and a setting. An electron injection layer between the cathode and the electron transport layer, and a hole injection layer disposed between the hole transport layer and the anode.
  • the first electrode 20 in addition to being used for cooperation with the second electrode 40 for display, it is also used to cooperate with the pressure sensitive electrode 50 to realize a pressure sensitive touch function. Therefore, as shown in FIG. 1a and FIG. 2a, the present disclosure is implemented.
  • the first electrode 20 is a strip electrode.
  • the first electrode 20 and the second electrode 40 may be one light transmissive, one opaque, or the same When the light is transmitted, it is not limited here.
  • the material When it is light transmissive, the material may be ITO (Indium Tin Oxides), or may be a metal material (so that the thickness of the electrode is thin); when it is opaque, the material may be metal material.
  • the type of the display panel 02 is not limited, and it may be an AMOLED (Active Matrix Organic Light Emitting Diode) display panel or a PMOLED (Passive Matrix Organic Light Emitting Diode). Diode) display panel.
  • AMOLED Active Matrix Organic Light Emitting Diode
  • PMOLED Passive Matrix Organic Light Emitting Diode
  • Diode Display Panel
  • the arrangement position of the first electrode 20 is not limited, and it may be disposed close to the first base substrate 10 as shown in FIG. 1b or may be disposed away from the first base substrate 10 as shown in FIG. 2b. That is, the first electrode may be disposed on a side of the organic material functional layer 30 adjacent to the first base substrate 10, or may be disposed on a side of the organic material functional layer 30 away from the first base substrate 10.
  • the material of the pressure sensitive electrode 50 is not limited. It may be a transparent conductive material such as ITO, or an opaque metal material such as molybdenum, aluminum, silver, etc., depending on the location. If the pressure sensitive electrode 50 is disposed on the light exiting side of the display panel 02, it is necessary to ensure that the material of the pressure sensitive electrode 50 is a transparent conductive material; if the pressure sensitive electrode 50 is disposed on the non-light emitting side of the display panel 02, the material of the pressure sensitive electrode 50 It can be a transparent conductive material or a metal material.
  • the pressure sensitive electrode 50 cannot exist alone and has a gap 60 with the display panel 02, it must be carried on the corresponding carrier substrate (neither shown in Figs. 1a, 1b and 2a, 2b). Based on this, the embodiment of the present disclosure does not limit the carrier substrate carrying the pressure sensitive electrode 50, and may be an inherent structure of the display device 01 other than the display panel 02, or may be an additional structure.
  • the manner in which the carrier substrate carrying the pressure sensitive electrode 50 and the display panel 02 are fixed is not limited, and the gap 60 may be formed between the pressure sensitive electrode 50 and the display panel 02.
  • the pressure sensitive electrode 50 When the pressure sensitive electrode 50 is disposed on the light exiting side of the display panel 02, it is necessary to ensure that the carrier substrate is also transparent.
  • the width of the gap 60 between the pressure sensitive electrode 50 and the display panel 02 is not limited, and the width of the gap 60 may be changed as long as a certain pressure is applied.
  • the width referred to herein means the width in the direction of the vertical display device 01.
  • any one of the pressure sensitive electrodes 50 may correspond to the first electrode 20 of the plurality of sub-pixel units.
  • the pressure sensitive electrode 50 and the first electrode 20 of the plurality of sub-pixel units are in the The projection of a substrate substrate 10 has an overlapping area.
  • the first electrode 20 of the plurality of sub-pixel units corresponding to the pressure sensitive electrode 50 may partially overlap the pressure sensitive electrode 50, or may be completely overlapped as long as the two have overlapping areas.
  • the embodiment of the present disclosure provides a display device 01 having a pressure sensitive touch function.
  • the pressure sensitive electrode 50 can be disposed on the first electrode 20 away from the layer of the organic material functional layer 30 so that the pressure sensitive electrode 50 can be combined with the first electrode.
  • a capacitance is formed between the two, and when the finger presses the display device 01, the width of the gap 60 between the pressure sensitive electrode 50 and the display panel 02 changes, so that the distance between the pressure sensitive electrode 50 and the first electrode 20 in the display panel 02 occurs.
  • the change further changes the capacitance value between the pressure sensitive electrode 50 and the first electrode 20, and according to the capacitance value, the pressure value can be corresponding to the touch function corresponding to the pressure value.
  • the present disclosure can associate the pressure value with the capacitance value and the pressure value with the touch function, various pressure recognition functions can be realized as needed. Since the pressure sensitive electrode 50 can be disposed in the entire display panel area, the problem of the pressure sensitive touch blind spot where the size of the display device 01 is large is solved. Further, since the pressure sensitive electrode 50 is formed with a capacitance between the first electrode 20 and the display electrode 02 itself, the manufacturing process of the display device 01 can be simplified.
  • the pressure sensitive electrode 50 may be disposed on an additional carrier substrate, ie, as shown in FIG. 3, the pressure sensitive electrode 50 may be disposed on the second substrate substrate 70, based on which the display panel 02 and the settings are based
  • the second base substrate 70 having the pressure sensitive electrode 50 may be fixed by the frame 80.
  • the frame 80 described above may have a convex portion for placing the display panel 02 and/or the second substrate substrate 70.
  • the structure of the frame 80 is not limited as long as the display panel 02 and the second substrate 70 can be fixed. Further, the material of the frame 80 is not limited, and may be made of, for example, polycarbonate.
  • the material and thickness of the second base substrate 70 can be selected as needed, and on the other hand, since the frame 80 is relatively easy to do.
  • the structure of various shapes is therefore easy to set the structure of the frame 80 according to the width of the gap 60 between the display panel 02 and the pressure sensitive electrode 50 on the second base substrate 70, so that the display panel 02 and the second substrate 70 are Support it. Further, the frame 80 can also function to engage the fixed display panel 02 and the second base substrate 70.
  • the display device 01 further includes a metal back shell; the first portion provided with the pressure sensitive electrode 50
  • the two base substrates 70 are disposed between the metal back shell and the display panel 02.
  • the pressure sensitive electrode 50 is disposed on the light-emitting side of the display device 01, and is disposed on the non-light-emitting side to avoid affecting the display.
  • the material of the pressure sensitive electrode 50 is a metallic material.
  • the material of the pressure sensitive electrode 50 may specifically be a metal material such as aluminum, molybdenum or silver.
  • the pressure sensitive electrode 50 since the resistance of the metal material is low, when the pressure sensitive electrode 50 is made of a metal material, it can have a higher touch sensitivity.
  • the first electrode 20 is opaque and the second electrode 40 is semi-transmissive.
  • the material of the first electrode 20 is a metal material, and the thickness thereof is thick; the material of the second electrode 40 is a metal material, and the thickness thereof is thin.
  • the metal material may be silver, aluminum, molybdenum or the like.
  • the opaque first electrode 20, the organic material functional layer 30, and the translucent second electrode 40 may constitute a microcavity, and the light is used in the microcavity.
  • the interference effect can further increase the light output efficiency.
  • the void is filled with a fluid or elastomeric material.
  • the pressure sensitive electrode includes a plurality of sub-pressure sensitive electrodes (eg, the components indicated by the rectangular frame indicated by reference numeral 50 shown in FIG. 2a), each of the sub-pressure sensing electrodes and the display panel Multiple sub-pixel units are opposite.
  • each sub-pressure sensitive electrode forms a capacitor with the first electrode.
  • the embodiment of the present disclosure further provides a driving method of the above display device 01. As shown in FIG. 4, the driving method includes the following steps S101 and S102.
  • a fixed voltage signal may be input to the first electrode 20 through a first driving IC connected to the first electrode 20, and a driving signal may be input to the pressure sensitive electrode 50 through a second driving IC connected to the pressure sensitive electrode 50, and passed through the second
  • the driver IC receives the feedback signal.
  • the first driver IC and the second driver IC may be the same driver IC or different driver ICs.
  • the size of the input fixed voltage signal is not limited, and can be reasonably set according to the voltage required for the touch in the actual application.
  • there is a one-to-one correspondence between the capacitance value and the pressure value and the one-to-one correspondence may be preset.
  • the function of the display device corresponding to the range opened here can be arbitrarily set, and for example, it can be an operation such as opening a certain program.
  • a standard pressure range may correspond to a function of the display device 01. Therefore, a plurality of standard pressure ranges may be set according to specific function items, and the correspondence may be preset.
  • the function of the display device 01 corresponding to the standard pressure range is not limited, and the corresponding function can be set according to the needs of the display device 01.
  • the pressure value obtained in step S101 is compared with a pre-stored standard pressure range, and if the pressure value is within one of the standard pressure ranges, the pressure range corresponding function is implemented. For example, in the standard pressure range, when the pressure is 0.003-0.005N, the corresponding function is open, and if the pressure value obtained by step S101 is 0.0035N, the function of opening is realized.
  • step S101 can be implemented in the following two ways:
  • the first mode in the pressure touch phase, the first driving IC inputs a fixed voltage signal to the first electrode 20, and the second driving IC inputs a driving signal to the pressure sensing electrode 50 and receives a feedback signal to obtain a touch position, and the The capacitance value between the pressure sensing electrode 50 and the first electrode 20 at the touch position; the second driving IC changes the time to the capacitance value according to the standard capacitance value, and obtains the pressure value corresponding to the capacitance value at the touch position; The time when the standard capacitance value changes to the capacitance value is in one-to-one correspondence with the pressure value; the standard capacitance value is a capacitance value between the pressure sensitive electrode 50 and the first electrode 20 when no touch occurs.
  • the spacing between the pressure sensitive electrode 50 and the first electrode 20 will decrease, and based on this, the actual spacing between the pressure sensitive electrode 50 and the first electrode 20 after the touch is applied.
  • the capacitance value between the pressure sensitive electrode 50 and the first electrode 20 at the touch position can be calculated by using the above parallel plate capacitance formula.
  • the one-to-one correspondence between the time required for the change of the standard capacitance value and the capacitance value between the pressure sensitive electrode 50 and the first electrode 20 after the touch is generated may be stored in advance in the second drive IC.
  • the interval between the pressure sensitive electrode 50 and the first electrode 20 is reduced by a small amount, and the pressure sensitive electrode 50 and The magnitude of the increase in capacitance between the first electrodes 20 is small, and it takes T2 time to complete the charging to the corresponding voltage.
  • the display device 01 is touched with a large force
  • the spacing between the pressure sensitive electrode 50 and the first electrode 20 is reduced.
  • the magnitude of the increase between the pressure sensing electrode 50 and the first electrode 20 is large, and it takes T1 time to complete the charging to reach the corresponding voltage. Based on this, the corresponding pressure value can be obtained according to the length of the charging time.
  • the pressure value corresponding to the time required for the standard capacitance value to change to the capacitance value between the pressure sensitive electrode 50 and the first electrode 20 after the touch is generated may be a range, and is not limited to one point value.
  • the time required for the standard capacitance value corresponding to the pressure value to change to the capacitance value between the pressure sensitive electrode 50 and the first electrode 20 after the touch is generated may also be a range.
  • the time during which the pressure sensitive electrode reaches the predetermined voltage value at the touch position may be acquired during the pressure touch phase (as shown in FIG. 5); according to the time, the pressure value is obtained. Wherein the time corresponds to the pressure value one-to-one.
  • the predetermined voltage value is not particularly limited and may be selected according to actual conditions. For example, the predetermined voltage value may be larger than the initial voltage of the pressure sensitive electrode or smaller than the initial voltage of the pressure sensitive electrode.
  • the difference in capacitance between the pressure sensitive electrode and the first electrode is different due to the difference in pressure during the touch phase.
  • Different capacitance values mean that the amount of charge required when the voltage reaches a predetermined voltage value is different, thereby affecting the charging time.
  • the second mode in the pressure touch phase, the first driving IC inputs a fixed voltage signal to the first electrode 20, and the second driving IC inputs a driving signal to the pressure sensing electrode 50 and receives a feedback signal to obtain a touch position and a predetermined
  • the one-to-one correspondence between the voltage value and the pressure value may be stored in advance in the second drive IC.
  • the capacitance value between the pressure sensitive electrode 50 and the first electrode 20 is increased by a small amount, and the capacitance saturation value is small, and is predetermined.
  • the time T arrives the voltage of the pressure sensitive electrode 50 can reach V1.
  • the capacitance value between the pressure sensitive electrode 50 and the first electrode 20 increases greatly, and the capacitance saturation value thereof is large.
  • the predetermined time T arrives, the pressure sensitive electrode The voltage of 50 can only reach V2. Based on this, the corresponding pressure value can be obtained according to the voltage value at the time of arrival of the predetermined time T.
  • the predetermined time is not limited, and the capacitance may be changed according to the actual touch process. The time required is set up reasonably.
  • the driving method further includes inputting a data signal to the second electrode 40 in the display phase.
  • the data signal may be input to the second electrode 40 through the third driving IC, and the third driving IC may be an IC different from the first driving IC.
  • the first driving IC inputs a fixed voltage value to the first electrode 20
  • the third driving IC inputs a different data signal to the second electrode 40, different display screens can be realized.
  • the display phase and the pressure touch phase are the same time period.
  • the fixed voltage value can be input to the first electrode 20 regardless of the display phase or the pressure touch phase, when the display phase and the pressure touch phase are the same time period, the first electrode 20 can be input.
  • the voltage can be displayed and the touch can be realized.
  • the corresponding signals can be input to the second electrode 40 and the pressure sensitive electrode 50 to realize the display and pressure touch functions at the same time. This can improve the user experience.

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Abstract

一种具有压感触控功能的显示装置及驱动方法。该压感触控功能的显示装置包括显示面板(02)以及压感电极(50)，所述显示面板(02)包括设置在第一衬底基板(10)上的第一电极(20)、第二电极(40)、位于所述第一电极(20)和所述第二电极(40)之间的有机材料功能层(30)，其中所述压感电极(50)设置在所述第一电极(20)远离所述有机材料功能层(30)的一侧，且所述压感电极(50)与所述显示面板(02)之间具有空隙；所述压感电极(50)与所述第一电极(20)在所述第一衬底基板(10)上的投影具有重叠面积。该显示装置可满足更多的触控功能需求，并解决压感触控盲点的问题。

Description

一种具有压感触控功能的显示装置及驱动方法 技术领域
本公开涉及一种具有压感触控功能的显示装置及驱动方法。
背景技术
随着显示技术的飞速发展，触控显示技术已经被广泛应用于手机、手表、平板电脑等各种显示产品中。有机电致发光二极管(Organic light emitting diode，OLED)显示器由于具有宽视角、低能耗、产品形态薄等特点已成为目前的发展趋势。
目前，在触控显示领域，压感触控(force touch)功能主要是通过在显示器中设置额外的机构来实现的。例如：2015年3月份，苹果公司发布了一款具有压感触控功能的触控设备，其是通过在触控设备的四个角分别安置一个重力感应器件，以实现轻，中，重三种压力识别功能。
然而，一方面，其仅可以实现三种压力识别功能，不能满足更多的触控功能需求，用户体验不足；另一方面，当触控设备尺寸较大时，这样就可能存在压感触控盲点的问题。
发明内容
本公开的一个实施例提供一种具有压感触控功能的显示装置，包括显示面板以及压感电极，所述显示面板包括设置在第一衬底基板上的第一电极、第二电极、位于所述第一电极和所述第二电极之间的有机材料功能层，其中所述压感电极设置在所述第一电极远离所述有机材料功能层的一侧，且所述压感电极与所述显示面板之间具有空隙；所述压感电极与所述第一电极在所述第一衬底基板上的投影具有重叠面积。
本公开的另一个实施例提供一种上述显示装置的驱动方法，包括：在压力触控阶段，向所述第一电极输入固定电压信号，向所述压感电极输入驱动信号并从所述压感电极接收反馈信号，以获取触控位置和电容值，并根据所述电容值得到压力值；将所述压力值以及预存的标准压力范围进行比较，在 所述压力值位于其中一个标准压力范围内的情况下，打开与该范围对应的所述显示装置的功能。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1a为本公开实施例提供的一种具有压感触控功能的显示装置的结构示意图；
图1b为图1a中AA向剖视示意图；
图2a为本公开实施例提供的另一种具有压感触控功能的显示装置的结构示意图；
图2b为图2a中BB向剖视示意图；
图3为本公开实施例提供的又一种具有压感触控功能的显示装置的结构示意图；
图4为本公开实施例提供的一种具有压感触控功能的显示装置的驱动方法的流程示意图；
图5为本公开实施例提供的一种充电时间与电压值对应关系的示意图；
图6为本公开实施例提供的另一种充电电压与电压值对应关系的示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本领域技术人员所理解的通常意义。本公开专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。
本公开实施例提供一种具有压感触控功能的显示装置01，如图1a和图1b、图2a和图2b所示，该显示装置01包括显示面板02，显示面板02包括设置在第一衬底基板10上的第一电极20、第二电极40、以及位于第一电极20和第二电极40之间的有机材料功能层30。该显示面板02还包括压感电极50；压感电极50设置在第一电极20远离有机材料功能层30的一侧，且压感电极50与显示面板02之间具有空隙60。压感电极50与第一电极20在第一衬底基板10上的投影具有重叠面积。
实现压感触控的原理为：由于压感电极50与第一电极20在第一衬底基板10上的投影具有重叠面积，且压感电极50与第一电极20之间具有间距，因此，根据平行板电容公式，即
Figure PCTCN2016087688-appb-000001
可知，压感电极50和第一电极20之间可以产生电容(C)。其中，ε为常量，S为压感电极50与第一电极20之间的重叠面积，d为压感电极50与第一电极20之间的间距。
基于此，当显示装置01没有受到压力(即没有发生触控)时，由于压感电极50和第一电极20之间的间距固定，因此，二者产生的电容固定。当用手指在显示装置01的出光侧施加一定的压力时，压感电极50与显示面板02之间的空隙60减小，使得压感电极50与第一电极20之间的间距减小，由平行板电容公式可知，压感电极50与第一电极20之间的电容将增加。在此基础上，可根据变化了的电容值与压力值之间的对应关系，得到触控位置处手指所施加的压力，并以此实现相应的触控功能。
需要说明的是，第一，所述显示面板02包括多个子像素单元，每个子像素单元均包括第一电极20、有机材料功能层30和第二电极40。
对于有机材料功能层30，其可以至少包括发光层，在此基础上为了能够提高电子和空穴注入发光层的效率，有机材料功能层30进一步还可以包括电子传输层、空穴传输层和设置在阴极与电子传输层之间的电子注入层，以及设置在空穴传输层与阳极之间的空穴注入层。
对于第一电极20，由于其除用于与第二电极40配合实现显示外，还用于与压感电极50配合实现压感触控功能，因此，如图1a和图2a所示，本公开实施例优选第一电极20为条形电极。
第一电极20和第二电极40可以是一个透光、一个不透光，也可以是同 时透光，具体在此不做限定。当其为透光时，材料可以是ITO(Indium Tin Oxides，铟锡金属氧化物)，也可以是金属材料(使电极的厚度较薄即可)；当其不透光时，材料可以是金属材料。
此外，不对所述显示面板02的类型进行限定，其既可以是AMOLED(Active matrix organic light emitting diode，主动式有机发光二极管)显示面板，也可以是PMOLED(Passive matrix organic light emitting diode，被动式有机发光二极管)显示面板。相比于AMOLED，PMOLED具有制作工艺简单，产品价格较低等特点，应用在小尺寸产品上，具有显著的优势。
第二，不对第一电极20的设置位置进行限定，其可以如图1b所示靠近第一衬底基板10设置，也可以如图2b所示远离第一衬底基板10设置。也就是说，第一电极即可以设置在有机材料功能层30靠近第一衬底基板10的一侧，也可以设置在有机材料功能层30远离第一衬底基板10的一侧。
在此基础上，不对压感电极50的材料进行限定，其可以采用透明导电材料如ITO，也可以采用不透明的金属材料，如钼、铝、银等，具体可根据其设置位置而定。若压感电极50设置在显示面板02的出光侧，则需保证压感电极50的材料为透明导电材料；若压感电极50设置在显示面板02的非出光侧，则压感电极50的材料可以为透明导电材料，也可以为金属材料。
此外，由于压感电极50不能单独存在而与显示面板02之间具有空隙60，因而其必须承载在相应的承载基板上(图1a、1b以及图2a、图2b中均未示出)。基于此，本公开实施例不对承载压感电极50的承载基板进行限定，可以是显示装置01的除显示面板02外的固有结构，也可以是额外增加的结构。
在此基础上，不对承载有压感电极50的承载基板与显示面板02的固定方式进行限定，只要在压感电极50和显示面板02之间形成空隙60即可。
当压感电极50设置在显示面板02的出光侧时，需保证上述承载基板也为透明。
第三，不对压感电极50与显示面板02之间的空隙60的宽度进行限定，只要施加一定的压力时，空隙60的宽度能发生变化即可。这里所指的宽度是指沿垂直显示装置01的方向的宽度。
第四，任一个压感电极50可以与多个子像素单元中的第一电极20对应。
此处对应即为：该压感电极50与多个子像素单元中的第一电极20在第 一衬底基板10的投影具有重叠面积。
本公开实施例中，与压感电极50对应的多个子像素单元中的第一电极20可以与压感电极50部分重叠，也可以是完全重叠，只要二者具有重叠面积即可。
本公开实施例提供了一种具有压感触控功能的显示装置01，通过在第一电极20远离有机材料功能层30的一层设置压感电极50，使得该压感电极50可以与第一电极20之间形成电容，当手指按压显示装置01时，由于压感电极50与显示面板02之间空隙60的宽度发生变化，从而使得压感电极50与显示面板02中第一电极20的间距发生变化，进而使得压感电极50与第一电极20之间的电容值发生变化，根据该电容值，可以对应压力值，进而可以实现与压力值对应的触控功能。基于此，由于本公开可以将压力值与电容值、以及压力值与触控功能对应起来，因此可根据需要实现多种压力识别功能。由于压感电极50可以设置是在整个显示面板区域，解决了显示装置01尺寸较大存在的压感触控盲点的问题。此外，由于压感电极50是与显示面板02自身就有的第一电极20之间形成电容，可以简化该显示装置01的制备工艺。
在一些示例中，压感电极50可以设置在额外的承载基板上，即，如图3所示，可以将压感电极50设置在第二衬底基板70上，基于此，显示面板02与设置有压感电极50的第二衬底基板70可以通过框架80固定。
上述框架80可以具有凸出部分，所述凸出部分供放置显示面板02和/或第二衬底基板70。
需要说明的是，对框架80的结构不做限定，只要能固定显示面板02和第二衬底基板70即可。此外，对框架80的材料也不做限定，例如可以由聚碳酸酯制成。
本公开实施例中，一方面，通过将压感电极50设置在第二衬底基板70上，可以根据需要选择第二衬底基板70的材料以及厚度，另一方面，由于框架80比较容易做成各种形状的结构，因此易于根据显示面板02与第二衬底基板70上压感电极50之间的空隙60的宽度设置框架80的结构，以便将显示面板02和第二衬底基板70支撑起来。此外，框架80还能起到卡合固定显示面板02和第二衬底基板70的作用。
在一些示例中，显示装置01还包括金属后壳；设置有压感电极50的第 二衬底基板70设置在金属后壳与显示面板02之间。
本公开实施例中，相对将压感电极50设置在显示装置01的出光侧，将其设置在非出光侧，可避免对显示造成影响。
在一些示例中，压感电极50的材料为金属材料。
压感电极50的材料具体可以是铝、钼、银等金属材料。
本公开实施例中，由于金属材料的电阻较低，因此当压感电极50采用金属材料时，可使其具有较高的触控灵敏度。
在一些示例中，第一电极20不透光，第二电极40半透光。
第一电极20的材料为金属材料，其厚度较厚；第二电极40的材料为金属材料，其厚度较薄。金属材料可以是银、铝、钼等。
当第一电极20不透光，第二电极40半透光时，不透明的第一电极20、有机材料功能层30、半透明的第二电极40可以构成一个微腔，利用光在微腔内的干涉效应可以进一步提高光的输出效率。
在一些示例中，所述空隙中填充有流体或者弹性物质。
在一些示例中，所述压感电极包括多个子压感电极(例如，图2a中所示的由标号50所指示的矩形框表示的部件)，每个子压感电极与所述显示面板中的多个子像素单元相对。
在一些示例中，每个子压感电极与所述第一电极形成电容器。
本公开实施例还提供了一种上述显示装置01的驱动方法，如图4所示，该驱动方法包括下列步骤S101和S102。
S101、在压力触控阶段，向第一电极20输入固定电压信号，向压感电极50输入驱动信号并接收反馈信号，以获取触控位置和电容值，并根据所述电容值得到压力值。
例如，可通过与第一电极20相连的第一驱动IC向第一电极20输入固定电压信号，通过与压感电极50相连的第二驱动IC向压感电极50输入驱动信号，并通过第二驱动IC接收反馈信号。第一驱动IC和第二驱动IC可以是同一个驱动IC也可以是不同的驱动IC。
需要说明的是，不对输入的固定电压信号的大小进行限定，可根据实际应用中触控所需的电压进行合理设置。此外，电容值与压力值存在一一对应关系，该一一对应关系可以是预先设置好的。
S102、将所述压力值以及预存的标准压力范围进行比较，若压力值位于其中一个标准压力范围内，则打开与该范围对应的所述显示装置01的功能。
例如，这里所打开与该范围对应的显示装置的功能是可以任意设定的，例如，可以是打开某个程序等操作。
一个标准压力范围可以对应显示装置01的一项功能，因此，可根据具体的功能项设置多个标准压力范围，且该对应关系可以是预先设置好的。
此处，不对标准压力范围对应的显示装置01的功能进行限定，可以根据显示装置01的需要设定相应的功能。将步骤S101得到的压力值与预存的标准压力范围进行对比，若该压力值位于其中一个标准压力范围内，则实现该压力范围对应功能。例如，在标准压力范围中，当压力为0.003-0.005N时，对应的功能是打开，若通过步骤S101获得的压力值是0.0035N，则将实现打开这一功能。
在此基础上，步骤S101可以通过如下两种方式实现：
第一种方式：在压力触控阶段，第一驱动IC向第一电极20输入固定电压信号，第二驱动IC向压感电极50输入驱动信号并接收反馈信号，以获取触控位置、以及该触控位置处压感电极50和第一电极20之间的电容值；第二驱动IC根据标准电容值变化到所述电容值的时间，得到该触控位置处电容值对应的压力值；其中，标准电容值变化到所述电容值的时间与所述压力值一一对应；标准电容值是未发生触控时，压感电极50和第一电极20之间的电容值。
在压力触控阶段，若发生触控，则压感电极50和第一电极20之间的间距将减小，基于此，根据触控后压感电极50和第一电极20之间的实际间距，利用上述平行板电容公式即可计算得到触控位置处压感电极50和第一电极20之间的电容值。
标准电容值变化到发生触控后压感电极50和第一电极20之间的电容值所需的时间与压力值一一对应关系可以预先存储在第二驱动IC中。如图5所示，在压力触控阶段，当以较小的力触控显示装置01时，压感电极50和第一电极20之间的间距减小的幅度较小，压感电极50和第一电极20之间的电容值增加的幅度较小，需要T2时间就可以完成充电达到相应的电压。当以较大的力触控显示装置01时，压感电极50和第一电极20之间的间距减小 的幅度较大，压感电极50和第一电极20之间的电容值增加的幅度较大，需要T1时间才可以完成充电达到相应的电压。基于此，根据充电时间的长短便可得到相应的压力值。
此处，与标准电容值变化到发生触控后压感电极50和第一电极20之间的电容值所需的时间一一对应的压力值可以是一个范围，而不局限与一个点值。同理，与该压力值对应的标准电容值变化到发生触控后压感电极50和第一电极20之间的电容值所需的时间也可以是一个范围。
也就是说，在一些示例中，在压力触控阶段可以获取该触控位置处所述压感电极到达预定电压值的时间(如图5所示)；根据所述时间，得到所述压力值；其中，所述时间与所述压力值一一对应。该预定电压值没有特别限定，可以根据实际情况而选择。例如，该预定电压值可以比压感电极的初始电压大或者比压感电极的初始电压小。
例如，由于在触控阶段压力不同造成压感电极与第一电极之间的电容值变化不同。不同的电容值意味着电压达到预定电压值时所需充电量不同，进而影响充电的时间。
第二种方式：在压力触控阶段，第一驱动IC向第一电极20输入固定电压信号，第二驱动IC向压感电极50输入驱动信号并接收反馈信号，以获取触控位置、以及预定时间到达时与该触控位置处压感电极50的电压值；根据所述电压值，得到压力值；其中，所述电压值与所述压力值一一对应。
电压值与压力值一一对应关系可以预先存储在第二驱动IC中。其中，如图6所示，当以较小的力触控显示装置01时，压感电极50和第一电极20之间的电容值增加的幅度较小，其电容饱和值较小，在预定时间T到达时，压感电极50的电压便可达到V1。当以较大的力触控显示装置01时，压感电极50和第一电极20之间的电容值增加的幅度较大，其电容饱和值较大，在预定时间T到达时，压感电极50的电压只能达到V2。基于此，根据预定时间T到达时的电压值便可得到相应的压力值。
需要说明的是，对于预定时间到达时该触控位置处压感电极50的电压值，可根据预定时间达到时，该触控位置处压感电极50和第一电极20之间的电容值得到。
此外，不对预定时间进行限定，可根据实际触控过程中电容发生变化需 要的时间进行合理设置。
基于上述，所述驱动方法还包括：在显示阶段，向第二电极40输入数据信号。
可通过第三驱动IC向第二电极40输入数据信号，第三驱动IC可以是与第一驱动IC不同的IC。
由于第一驱动IC向第一电极20输入固定的电压值，当第三驱动IC向第二电极40输入不同的数据信号时，可以实现不同的显示画面。
在一些示例中，上述显示阶段和压力触控阶段为同一时间段。
此处，由于不管是显示阶段还是压力触控阶段，都可以向第一电极20输入固定的电压值，因此，当显示阶段和压力触控阶段为同一时间段时，可向第一电极20输入既能实现显示又能实现触控的电压，在此基础上分别向第二电极40和压感电极50输入相应的信号即可同时实现显示和压力触控功能。这样可以提高用户体验。
以上所述仅是本发明的示范性实施方式，而非用于限制本发明的保护范围，本发明的保护范围由所附的权利要求确定。
本申请要求于2015年11月9日递交的中国专利申请第201510758107.7号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (13)

  1. 一种具有压感触控功能的显示装置，包括显示面板以及压感电极，所述显示面板包括设置在第一衬底基板上的第一电极、第二电极、位于所述第一电极和所述第二电极之间的有机材料功能层，其中
    所述压感电极设置在所述第一电极远离所述有机材料功能层的一侧，且所述压感电极与所述显示面板之间具有空隙；
    所述压感电极与所述第一电极在所述第一衬底基板上的投影具有重叠面积。
  2. 根据权利要求1所述的显示装置，其中，所述压感电极设置在第二衬底基板上；
    所述显示面板与设置有所述压感电极的第二衬底基板通过框架固定。
  3. 根据权利要求2所述的显示装置，其中，所述显示装置还包括金属后壳；
    设置有所述压感电极的第二衬底基板设置在所述金属后壳与所述显示面板之间。
  4. 根据权利要求1-3任一项所述的显示装置，其中，所述压感电极的材料为金属材料。
  5. 根据权利要求1-4任一项所述的显示装置，其中，所述第一电极不透光；所述第二电极半透光。
  6. 根据权利要求1-5任一项所述的显示装置，其中，所述空隙中填充有流体或者弹性物质。
  7. 根据权利要求1-6任一项所述的显示装置，其中，所述压感电极包括多个子压感电极，每个子压感电极与所述显示面板中的多个子像素单元相对。
  8. 根据权利要求7所述的显示装置，其中，每个子压感电极与所述第一电极形成电容器。
  9. 一种如权利要求1所述的显示装置的驱动方法，包括：
    在压力触控阶段，向所述第一电极输入固定电压信号，向所述压感电极输入驱动信号并从所述压感电极接收反馈信号，以获取触控位置和电容值，并根据所述电容值得到压力值；
    将所述压力值以及预存的标准压力范围进行比较，在所述压力值位于其中一个标准压力范围内的情况下，打开与该范围对应的所述显示装置的功能。
  10. 根据权利要求9所述的驱动方法，其中，在压力触控阶段，向所述压感电极输入驱动信号并从所述压感电极接收反馈信号，以获取触控位置和电容值，并根据所述电容值得到压力值，包括：
    在压力触控阶段，向所述压感电极输入驱动信号并从所述压感电极接收反馈信号，以获取所述触控位置、以及该触控位置处所述压感电极到达预定电压值的时间；
    根据所述时间，得到所述压力值；
    其中，所述时间与所述压力值一一对应。
  11. 根据权利要求9所述的驱动方法，其中，在压力触控阶段，向所述压感电极输入驱动信号并从所述压感电极接收反馈信号，以获取触控位置和电容值，并根据所述电容值得到压力值，包括：
    在压力触控阶段，向所述压感电极输入驱动信号并从所述压感电极接收反馈信号，以获取所述触控位置、以及预定时间到达时与该触控位置处的所述压感电极的电压值；
    根据所述电压值，得到所述压力值；
    其中，所述电压值与所述压力值一一对应。
  12. 根据权利要求9所述的驱动方法，其中，所述驱动方法还包括：
    在显示阶段，向所述第二电极输入数据信号。
  13. 根据权利要求12所述的驱动方法，其中，所述显示阶段和所述压力触控阶段为同一时间段。
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