CN106681560B - Touch screen and driving method thereof - Google Patents
Touch screen and driving method thereof Download PDFInfo
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- CN106681560B CN106681560B CN201710002187.2A CN201710002187A CN106681560B CN 106681560 B CN106681560 B CN 106681560B CN 201710002187 A CN201710002187 A CN 201710002187A CN 106681560 B CN106681560 B CN 106681560B
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- electrode
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- touch screen
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- 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
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
Abstract
The invention discloses a touch screen and a driving method thereof. The touch screen comprises a substrate and a plurality of touch units positioned on the substrate, wherein each touch unit comprises a first electrode and a second electrode which are oppositely arranged, and a liquid drop and a hydrophobic layer which are positioned between the first electrode and the second electrode; a bias voltage is loaded between the first electrode and the second electrode; the liquid drop is used for generating deformation when touch occurs so as to generate current on the first electrode and the second electrode. The invention avoids the problem that the resistance sensor of the resistance type touch screen can not distinguish whether the touch is one point or two points and the problems of misoperation and ghost points when the capacitance type touch screen touches, thereby improving the touch precision.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch screen and a driving method thereof.
Background
The existing touch screen mainly comprises a resistive touch screen, a capacitive touch screen, a surface acoustic wave touch screen, an infrared sensing touch screen and the like, and the resistive touch screen and the capacitive touch screen are mainly applied to electronic products.
The upper and lower display panels of the resistive touch screen need a loop mode to enable the current to be conducted all the time, the resistive touch screen still consumes power when no touch action is performed, and when multi-point touch is realized under the traditional resistive touch technology, if two touched points are too close to each other, the resistive sensor cannot distinguish whether one touched point or two touched points are one or two touched points. The capacitive touch screen needs to be operated by fingers, in the capacitive multi-touch technology, a panel needs to be kept clean, any dirt and even static electricity brought by fog can cause misoperation, and the capacitive multi-touch often generates so-called 'ghost points' in use.
In summary, the touch screen in the prior art has low touch accuracy.
Disclosure of Invention
The invention provides a touch screen and a driving method thereof, which are used for improving the touch accuracy of the touch screen.
In order to achieve the above object, the present invention provides a touch screen, including a substrate and a plurality of touch units located on the substrate, each of the touch units includes a first electrode and a second electrode oppositely disposed, and a liquid drop and a hydrophobic layer located between the first electrode and the second electrode;
a bias voltage is loaded between the first electrode and the second electrode;
The liquid drop is used for generating deformation when touch occurs so as to generate current on the first electrode and the second electrode.
Optionally, the method further comprises: the transparent insulating layer is positioned on one side of the first electrode, which is far away from the substrate base plate.
Optionally, the method further comprises: spacers located between the touch units;
The spacer is used to block the droplet.
Optionally, the first electrodes of each row are connected in parallel, and the second electrodes of each column are connected in parallel; or
The second electrodes of each row are connected in parallel, and the first electrodes of each column are connected in parallel.
Optionally, the parallel first electrodes are connected to the corresponding first detection pins, and the parallel second electrodes are connected to the corresponding second detection pins;
The first detection pin is used for detecting the current value on the corresponding first electrode;
The second detection pin is used for detecting the current value on the corresponding second electrode.
Optionally, the material of the first electrode is a transparent conductive material, and the material of the second electrode is a transparent conductive material.
Optionally, the material of the first electrode is polyvinylidene fluoride, and the material of the second electrode is ITO.
Optionally, the material of the transparent insulating layer is a rigid transparent material.
Optionally, the material of the transparent insulating layer is poly-p-carbonate.
Optionally, the first electrode has a thickness of 50 μm to 150 μm.
In order to achieve the above object, the present invention provides a driving method of a touch screen, the touch screen including a substrate and a plurality of touch units located on the substrate, each of the touch units including a first electrode and a second electrode oppositely disposed, and a liquid drop and a hydrophobic layer located between the first electrode and the second electrode;
the method comprises the following steps:
A bias voltage is loaded between the first electrode and the second electrode;
The liquid drop deforms when a touch occurs so that a current is generated on the first electrode and the second electrode.
the invention has the following beneficial effects:
According to the technical scheme of the touch screen and the driving method thereof, the touch screen comprises a plurality of touch units, bias voltage is loaded between the first electrode and the second electrode in each touch unit, and the liquid drops are used for generating deformation when touch occurs so as to generate current on the first electrode and the second electrode, so that the problem that a resistance type touch screen resistance sensor cannot distinguish one point or two points of touch is solved, the problems of misoperation and ghost points when the capacitance type touch screen touches are solved, and the touch accuracy is improved.
Drawings
Fig. 1 is a schematic structural diagram of a touch screen provided in the present invention;
FIG. 2 is a schematic view showing the arrangement of the first electrode and the second electrode in the first embodiment;
Fig. 3 is a schematic diagram of the touch screen in fig. 1 in a touch state.
Detailed Description
in order to make those skilled in the art better understand the technical solution of the present invention, the following describes the touch screen and the driving method thereof in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a touch screen according to the present invention, and as shown in fig. 1, the touch screen includes a substrate 11 and a plurality of touch units located on the substrate 11, each touch unit includes a first electrode 12 and a second electrode 13 that are oppositely disposed, and a liquid drop 14 and a hydrophobic layer 15 located between the first electrode 12 and the second electrode 13. Wherein, a bias voltage is loaded between the first electrode 12 and the second electrode 13; the liquid drop 14 is used to deform when a touch occurs to generate a current on the first electrode 12 and the second electrode 13.
preferably, the plurality of touch units are arranged in a matrix. It should be noted that: the touch screen may include a plurality of touch units, and the structure of only one touch unit is illustrated in fig. 1 as an example.
in this embodiment the hydrophobic layer 15 is located between the droplet 14 and the second electrode 13. Specifically, the second electrode 13 is positioned on the substrate base plate 11, the hydrophobic layer 15 is positioned on the second electrode 13, and the droplet 14 is positioned between the hydrophobic layer 15 and the first electrode 12.
In the present embodiment, each touch unit is insulated from each other, that is, the first electrode 12, the second electrode 13, the liquid droplet 14 and the hydrophobic layer 15 in each touch unit are independently disposed, and the corresponding structures in different touch units are insulated from each other.
Further, the touch screen further includes: and the transparent insulating layer 16 is arranged on one side of the first electrode 12 far away from the substrate base plate 11. Preferably, the transparent insulating layer 16 is a whole layer structure, covering the entire touch unit above the substrate base plate 11.
further, the touch screen further includes: spacers 17 between the touch cells, the spacers 17 serving to block the droplets 14. So that the droplet 14 is located in the touch cell. Specifically, the spacer 17 is located on the substrate base plate 11, and the transparent insulating layer 16 is located on the spacer 17. Preferably, the spacer 17 is disposed around the touch unit. In this embodiment, the spacers 17 may also function to separate the touch units, in addition to the function of blocking the liquid droplets 14. Preferably, the spacer 17 may be a black matrix.
in this embodiment, the material of the first electrode 12 is a transparent conductive material, and the first electrode 12 has light transmissivity. Preferably, the material of the first electrode 12 is polyvinylidene fluoride.
In this embodiment, the material of the second electrode 13 is a transparent conductive material, and preferably, the material of the second electrode 13 is ITO.
In this embodiment, the transparent insulating layer 16 is made of a rigid transparent material, the transparent insulating layer 16 may be a transparent polymer film with certain rigidity, and the transparent insulating layer 16 has light transmittance. Preferably, the material of the transparent insulating layer 16 is poly-p-carbonate.
in the present embodiment, the thickness of the first electrode 12 is 50 μm to 150 μm.
in this embodiment, the base substrate 11 is a glass substrate.
Fig. 2 is a schematic distribution diagram of the first electrode and the second electrode in the first embodiment, as shown in fig. 2, fig. 2 shows the first electrode 12 and the second electrode 13 in a plurality of touch units, and the first electrode 12 and the second electrode 13 in each touch unit are correspondingly disposed. Since the touch cells are arranged in a matrix, the first electrodes 12 are arranged in a matrix, and the second electrodes 13 are arranged in a matrix. The first electrodes 12 of each row are connected in parallel and the second electrodes 13 of each column are connected in parallel. The parallel first electrodes 12 are connected to corresponding first detection pins, and the parallel second electrodes 13 are connected to corresponding second detection pins. The first detection pin is used for detecting the current value on the corresponding first electrode 12, and the second detection pin is used for detecting the current value on the corresponding second electrode 13. A first voltage is applied to the parallel first electrodes 12 of each row and a second voltage is applied to the parallel second electrodes 13 of each column. A difference between a first voltage applied to the first electrode 12 and a second voltage applied to the second electrode 13 corresponding to the first electrode 12 is a bias voltage, so that the bias voltage is applied between the first electrode 12 and the second electrode 13. For example, if the first voltage is a positive voltage, the second voltage is a negative voltage.
in practical applications, optionally, the second electrodes of each row are connected in parallel, and the first electrodes of each column are connected in parallel. This case will not be described in detail.
Fig. 3 is a schematic diagram of the touch screen in fig. 1 in a touch state. The operation of the touch screen will be described in detail with reference to fig. 1, 2 and 3.
As shown in fig. 1, in the initial state, the droplet 14 is in a full droplet state due to the wettability with the water-repellent layer 15, and the droplet 14 in the full droplet state is provided between the first electrode 12 and the second electrode 13. At this time, since a bias voltage is applied between the first electrode 12 and the second electrode 13, the first electrode 12, the droplet 14 and the second electrode 13 form a closed circuit, the first electrode 12, the droplet 14 and the second electrode 13 are equivalent to a variable capacitor, and the closed circuit is equivalent to an open circuit after the variable capacitor is instantly charged and stabilized, and no current passes through and no electric energy is lost. As shown in fig. 2, since no current is generated, the current values detected at the first detection pins and the second detection pins are all zero, that is, the current value at the first electrode 12 is zero, and the current value at the second electrode 13 is zero.
As shown in fig. 3, when the touch screen is touched, the transparent insulating layer 16 and the first electrode 12 are deformed under pressure, and the space of the cavity formed between the first electrode 12 and the hydrophobic layer 15 is reduced, so that the liquid droplet 14 is squeezed and deformed, and at this time, the distance between the two plates of the equivalent variable capacitor is reduced, the capacitance value of the variable capacitor is increased, the bias voltage charges the variable capacitor additionally, and a charging current is generated in the closed loop. Namely: the surfaces of the first electrode 12 and the second electrode 13 generate electric charges, respectively, and a new voltage difference is formed between the first electrode 12 and the second electrode 13 and a current is generated. As shown in fig. 2, when the current value at the first electrode 12 is detected by the first detection pin connected to the first electrode 12 at the touch position, the current value at the second electrode 13 is detected by the second detection pin connected to the second electrode 13 at the touch position, and the current values detected by the first detection pin and the second detection pin are changed from the current value detected in the initial state, the position where the row of the first electrode 12 connected to the first detection pin and the column of the second electrode 13 connected to the second detection pin intersect is the touch point position. Therefore, the present embodiment can determine the touch point position by detecting the changed current value.
In summary, the touch screen of the embodiment adopts the reverse electrowetting principle, and the reverse electrowetting principle realizes conversion from mechanical energy to electrical energy, thereby realizing the detection process of the touch position. The touch screen in this embodiment can provide the energy by oneself, can realize accurate multiple spot touch-control, can feel touch-control intensity in order to realize 3D touch-control experience. The touch screen of the embodiment can realize perfect multi-point touch.
in the technical scheme of the touch screen provided by the embodiment, the touch screen comprises a plurality of touch units, bias voltage is loaded between the first electrode and the second electrode in each touch unit, and the liquid drop is used for generating deformation when touch occurs so as to generate current on the first electrode and the second electrode, so that the problem that a resistance type touch screen resistance sensor cannot distinguish one point or two points of touch and the problems of misoperation and ghost points when the capacitance type touch screen touches are avoided, and the touch accuracy is improved.
The second embodiment of the invention provides a driving method of a touch screen, which comprises a substrate and a plurality of touch units positioned on the substrate, wherein each touch unit comprises a first electrode and a second electrode which are oppositely arranged, and a liquid drop and a hydrophobic layer which are positioned between the first electrode and the second electrode.
The method comprises the following steps: a bias voltage is loaded between the first electrode and the second electrode; the liquid drop deforms when a touch occurs so that a current is generated on the first electrode and the second electrode.
The driving method of the touch screen provided by this embodiment may be used to drive the touch screen provided by the first embodiment, and for the specific description of the touch screen, reference may be made to the first embodiment, and a description thereof is not repeated here.
In the technical scheme of the driving method of the touch screen provided by the embodiment, the touch screen comprises a plurality of touch units, a bias voltage is loaded between a first electrode and a second electrode in each touch unit, and liquid drops are used for generating deformation when touch occurs so as to generate current on the first electrode and the second electrode, so that the problem that a resistance type touch screen resistance sensor cannot distinguish one point or two points of touch and the problems of misoperation and ghost points when the capacitance type touch screen touches are avoided, and the touch accuracy is improved.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (11)
1. A touch screen is characterized by comprising a substrate and a plurality of touch units positioned on the substrate, wherein each touch unit comprises a first electrode and a second electrode which are oppositely arranged, and a liquid drop and a hydrophobic layer which are positioned between the first electrode and the second electrode;
A bias voltage is loaded between the first electrode and the second electrode;
The liquid drop is used for generating deformation when touch occurs so as to generate current on the first electrode and the second electrode.
2. the touch screen of claim 1, further comprising: the transparent insulating layer is positioned on one side of the first electrode, which is far away from the substrate base plate.
3. The touch screen of claim 1, further comprising: spacers located between the touch units;
The spacer is used to block the droplet.
4. the touch screen of claim 1, wherein each row of the first electrodes is connected in parallel and each column of the second electrodes is connected in parallel; or
The second electrodes of each row are connected in parallel, and the first electrodes of each column are connected in parallel.
5. the touch screen of claim 4, wherein the parallel first electrodes are connected to the corresponding first detection pins, and the parallel second electrodes are connected to the corresponding second detection pins;
The first detection pin is used for detecting the current value on the corresponding first electrode;
The second detection pin is used for detecting the current value on the corresponding second electrode.
6. The touch screen of claim 1, wherein the material of the first electrode is a transparent conductive material and the material of the second electrode is a transparent conductive material.
7. the touch screen of claim 6, wherein the material of the first electrode is polyvinylidene fluoride and the material of the second electrode is ITO.
8. The touch screen of claim 2, wherein the material of the transparent insulating layer is a rigid transparent material.
9. the touch screen of claim 2 or 8, wherein the material of the transparent insulating layer is poly-p-carbonate.
10. the touch screen of claim 1, wherein the first electrode has a thickness of 50 μ ι η to 150 μ ι η.
11. a driving method of a touch screen is characterized in that the touch screen comprises a substrate and a plurality of touch units positioned on the substrate, wherein each touch unit comprises a first electrode and a second electrode which are oppositely arranged, and a liquid drop and a hydrophobic layer which are positioned between the first electrode and the second electrode;
The method comprises the following steps:
A bias voltage is loaded between the first electrode and the second electrode;
The liquid drop deforms when a touch occurs so that a current is generated on the first electrode and the second electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710002187.2A CN106681560B (en) | 2017-01-03 | 2017-01-03 | Touch screen and driving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710002187.2A CN106681560B (en) | 2017-01-03 | 2017-01-03 | Touch screen and driving method thereof |
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| CN106681560A CN106681560A (en) | 2017-05-17 |
| CN106681560B true CN106681560B (en) | 2019-12-06 |
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| CN201710002187.2A Active CN106681560B (en) | 2017-01-03 | 2017-01-03 | Touch screen and driving method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108226012B (en) * | 2018-01-02 | 2021-01-26 | 京东方科技集团股份有限公司 | Microfluidic chip, analysis device, and control method for microfluidic chip |
| CN113495640A (en) * | 2020-04-01 | 2021-10-12 | 万达光电科技股份有限公司 | Touch sensor |
| CN112214132B (en) * | 2020-10-19 | 2021-04-30 | 深圳市捷诚技术服务有限公司 | False touch correction method and device, computer readable medium and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101556515A (en) * | 2008-04-08 | 2009-10-14 | 瑞鼎科技股份有限公司 | Touch sensing assembly and touch sensing device |
| CN102389840A (en) * | 2010-07-06 | 2012-03-28 | 夏普株式会社 | Array element circuit and active matrix device |
| KR20130121633A (en) * | 2012-04-28 | 2013-11-06 | 최현환 | Liquid lens of electrowetting with jar structure |
| CN104020560A (en) * | 2014-06-19 | 2014-09-03 | 友达光电股份有限公司 | Electro-wetting display panel |
| CN104808876A (en) * | 2014-01-23 | 2015-07-29 | 新励科技(深圳)有限公司 | Capacitance type touch panel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8815070B2 (en) * | 2010-03-09 | 2014-08-26 | Sparkle Power, Inc. | Microelectrode array architecture |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556515A (en) * | 2008-04-08 | 2009-10-14 | 瑞鼎科技股份有限公司 | Touch sensing assembly and touch sensing device |
| CN102389840A (en) * | 2010-07-06 | 2012-03-28 | 夏普株式会社 | Array element circuit and active matrix device |
| KR20130121633A (en) * | 2012-04-28 | 2013-11-06 | 최현환 | Liquid lens of electrowetting with jar structure |
| CN104808876A (en) * | 2014-01-23 | 2015-07-29 | 新励科技(深圳)有限公司 | Capacitance type touch panel |
| CN104020560A (en) * | 2014-06-19 | 2014-09-03 | 友达光电股份有限公司 | Electro-wetting display panel |
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