CN108762539A - capacitive pressure detection method - Google Patents
capacitive pressure detection method Download PDFInfo
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- CN108762539A CN108762539A CN201810147597.0A CN201810147597A CN108762539A CN 108762539 A CN108762539 A CN 108762539A CN 201810147597 A CN201810147597 A CN 201810147597A CN 108762539 A CN108762539 A CN 108762539A
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- base material
- electrode
- pressure
- display screen
- gap
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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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
A kind of capacitive pressure detection method, for detecting the pressing force applied on a display screen, the first base material with electrode and the second base material are set, the first base material and the second base material front are relatively fit together, make to form gap between respectively set electrode, the gap and the air communication outside the first base material and the second base material；It is at least one in the first base material and the second base material to be used as pressure loading end, pressure loading end is attached to below the display module of display screen.The present invention is not necessarily to form pressure sensing capacitance by the component in display screen, can be suitable for current most of display screens；The present invention provides physical support to form the gap of pressure sensing capacitance, it is ensured that gap thickness is controllable；The present invention ensures the rate of change of capacitance of pressure sensing capacitance by substrate material and foam medium, improves the sensitivity of pressure detecting.
Description
Technical field
The present invention relates to the method for acquiring power and being converted to electric signal, more particularly to using capacitance as conversion medium,
It will reflect that the Electric signal processing of pressure is the method for pressure data.
Background technology
The prior art based on capacitance principle, can detect that apply the display screen of pressing force thereon include for completing image
The display module of display, pressure detecting electrode, and the backlight module with iron frame.A kind of implementation is pressure detecting electrode
It is bonded with display module, the air gap is formed between pressure detecting electrode and backlight module, be ginseng with the iron frame of backlight module
Plane is examined, pressure sensing capacitance is formed between pressure detecting electrode and backlight module.When there is pressing force to apply on a display screen,
Pressure detecting electrode is deformed upon with the deformation of compression display module, because the iron frame of pressure detecting electrode and backlight module it
Between spacing change and pressure sensing capacitance between the two made to change, by data processing by pressure sensing capacitance
Variable quantity be converted to the pressure value of pressing force.Another implementation is that pressure detecting electrode is bonded with backlight module, is being pressed
The air gap is formed between power detecting electrode and display module, using display module as reference planes, pressure detecting electrode and display
Pressure sensing capacitance is formed between module.When there is pressing force to apply on a display screen, display module as a reference plane
It deforms upon, makes pressure sensing capacitance between the two because the spacing between pressure detecting electrode and display module changes
It changes, the variable quantity of pressure sensing capacitance is converted to the pressure value of pressing force by data processing.The prior art exists
Defect and shortcoming below：
1. energy when needing the air gap there are adequate thickness between display module and backlight module to ensure to occur push action
It is enough to generate the pressure sensing capacitance variable quantity for being different from interference signal enough, but air can not resist interstructural variation and make
The thickness of the air gap is not easy to control；
2. not all display screen is both provided with the backlight module with iron frame；
When display module uses thin film transistor liquid crystal display Thin Film Transistor Liquid Crystal
When the display module of Display, the backlight module of nonmetallic frame is used in some applications, this is caused to use the backlight of nonmetallic frame
Module can not form pressure sensing capacitance between pressure detecting electrode as a reference plane, also just cannot achieve pressure detecting；
Thin film transistor liquid crystal display Thin Film Transistor Liquid Crystal Display abbreviations TFT-LCD；
When display module uses active-matrix Organic Light Emitting Diode Active Matrix Organic Light Emitting
When the display module of Diode, it is not necessary that backlight module is arranged, pressure detecting electrode is flat because of the reference for not forming pressure sensing capacitance
Face and cannot achieve pressure detecting；Active-matrix Organic Light Emitting Diode Active Matrix Organic Light
Emitting Diode abbreviations AMOLED.
Invention content
The technical problem to be solved in the present invention is to avoid the deficiencies in the prior art place and propose can be used in current big
The capacitive pressure detection method of most display screens.
The present invention, which solves the technical problem, to be realized by using following technical scheme：
It is proposed a kind of capacitive pressure detection method, for detecting the pressing force applied on a display screen, which includes energy
Enough display modules of deformation due to applying pressing on a display screen；The method includes：
Choose the first base material and the second base material of the deformation that can be pressurized；
In a front setting at least first electrode for the first base material；In a front setting at least second electrode for the second base material；
The first base material and the second base material front are relatively fit together, face where making all first electrodes and all second electricity
Gap, and the gap and the air communication outside the first base material and the second base material are formed between face where pole；All first electrode institutes
The thickness in gap at a distance between face where face with all second electrodes, the first base material and the second base material be not pressurized deformation when
The thickness in gap is normality thickness；
At least one of the first base material and the second base material are used as pressure loading end, and pressure loading end is attached to the aobvious of display screen
Show below module, enables the deformation with the deformation of display screen of pressure loading end；
Apply electric signal to first electrode and second electrode respectively, makes to form voltage difference between first electrode and second electrode, from
And pressure sensing capacitance is formed between first electrode and second electrode；
When there is push action on display screen, pressure loading end deforms upon, and the thickness in the gap changes, and then first
Pressure sensing capacitance between electrode and second electrode changes, and the variation of pressure sensing capacitance is obtained by data processing
Obtain the pressure data of pressing force on display screen.
To form pressure detecting mutual capacitance, to one group of application driving letter in all first electrodes and all second electrodes
Number, in another group of collection response signal, become to detect the pressure detecting mutual capacitance formed between first electrode and second electrode
Change.
It is electric to one group of application reference in all first electrodes and all second electrodes for stars pressure detecting self-capacitance
Position to another group of application electric signal and detects electric quantity change thereon, is formed between first electrode and second electrode to detect
Pressure detecting self-capacitance changes.
To realize that the gap of non-close, the method specifically include：
The front edge of the first base material is bonded closing with the front edge of the second base material with annular colloid；
The air-flow through-hole that an at least one processing at least communication gap is chosen in the first base material and the second base material, makes gap and the
Air communication outside one base material and the second base material.
To improve the deformation quantity of pressure loading end, it is less than for manufacturing for manufacturing the Young's modulus of material of the first base material
The Young's modulus of the material of second base material；It is attached to below the display module of display screen using the first base material as pressure loading end.
To improve the deformation quantity another method of pressure loading end, it is less than for manufacturing the Young's modulus of material of the second base material
Young's modulus for the material for manufacturing the first base material；The display mould of display screen is attached to using the second base material as pressure loading end
Group lower section.
To improve rate of change of capacitance, the method is higher than foam media filler made of the material of air with dielectric constant and exists
In gap.
Specifically, the dielectric constant is high density polyurethane material higher than the material of air.
The display module of a kind of application scheme, the display screen is the display module of thin film transistor liquid crystal display, this is aobvious
Display screen further includes one layer of backlight module being arranged below thin film transistor liquid crystal display module, then the first base material or second
Base material is attached to as pressure loading end below backlight module.
The display module of another application scheme, the display screen is active-matrix organic light-emitting diode display module,
So the first base material or the second base material are attached to active-matrix organic light-emitting diode display module as pressure loading end
Cathode plane.
Compared with the existing technology compared with " capacitive pressure detection method " of the invention has technical effect that：
1. pressure loading end is fitted in display screen by the present invention without forming pressure sensing capacitance by the component in display screen
Deformable element on pressure detecting can be realized, current most of display screens can be suitable for；
2. the present invention provides physical support to form the gap of pressure sensing capacitance, it is ensured that gap thickness is controllable；
3. the present invention ensures the rate of change of capacitance of pressure sensing capacitance by substrate material and foam medium, pressure detecting is improved
Sensitivity.
Description of the drawings
Fig. 1 is the orthographic projection schematic front view of " capacitive pressure detection method " first embodiment of the invention；
Fig. 2 is the orthographic projection schematic top plan view of the first embodiment；Wherein the first base material 11 is cut away by demifacet；
Fig. 3 is A-A schematic cross-sectional views shown in Fig. 2；
Fig. 4 is the schematic cross-sectional view along A-A directions shown in Fig. 2 when the first embodiment is depressed；
Fig. 5 be the first embodiment be used for TFT-LCD display screens when along A-A directions shown in Fig. 2 schematic cross-sectional view；
Fig. 6 be the first embodiment be used for AMOLED display screens when along A-A directions shown in Fig. 2 schematic cross-sectional view；
Fig. 7 is the orthographic projection schematic top plan view of second embodiment of the invention；Wherein the first base material 11 is cut away by demifacet.
Specific implementation mode
It is described in further detail below in conjunction with each embodiment shown in attached drawing.
The present invention proposes a kind of capacitive pressure detection method, for detecting the pressing force applied on a display screen.Apply
Pressing force on a display screen is different from the input of the touching to screen, and pressing force is to apply pressure to display screen, and touch input
Pressure need not be applied, it is only necessary to have contact to display screen.The display screen includes can be because applying on a display screen
It presses and the display module of deformation.As shown in Figures 1 to 7, the capacitive pressure detection method comprises the following processes：
Choose the first base material 11 and the second base material 12 of the deformation that can be pressurized；
In a front setting at least first electrode 21 for the first base material 11；In at least one second electricity of front setting of the second base material 12
Pole 22；The flexible printed circuit board Flexible Printed of abbreviation FPC may be used in the first base material 11 and the second base material 12
Circuit can also use film F ilm；First electrode 21 and second electrode 22 may be used silver coating material and be made, can also
It is made, can also be made of the tin indium oxide Indium Tin Oxide materials of abbreviation ITO of metal paving copper product；
The first base material 11 and 12 front of the second base material are relatively fit together, makes 21 place face of all first electrodes and owns
Gap 5, and the gap 5 and the air communication outside the first base material 11 and the second base material 12 are formed between 22 place face of second electrode,
Namely gap 5 is non-closed space；The present invention is by 21 place face of all first electrodes and 22 place face of all second electrodes
The distance between thickness as gap 5, then the first base material and the second base material are not pressurized, the thickness of deformation time gap 5 is exactly normal
State thickness；The face where 21 place face of first electrode and second electrode be all plane and it is parallel to each other when, normality thickness is to determine
Value；And when being not plane or 21 place face of first electrode and second of the face where 21 place face of first electrode and second electrode
When face where electrode is not parallel to each other, normality thickness is exactly according to the different and different variable of two sides relative position, i.e., according to first electrode
21 and second electrode 22 respectively where face form and consecutive variations occur.Therefore normality thickness cannot be understood merely as being one
Fixed amount, but the function variable joined with the morphologic correlation in first electrode 21 and second electrode 22 face where respective；
It is at least one in the first base material 11 and the second base material 12 to be used as pressure loading end, pressure loading end is attached to display screen
Below display module, enable the deformation with the deformation of display screen of pressure loading end.In most cases, 11 He of the first base material
One in second base material 12 is used as pressure loading end, but under special circumstances, such as capacitive pressure detection components are used
When double-sided screen, the first base material 11 and the second base material 12 are used as pressure loading end；First embodiment of the invention and second is implemented
Example is all made of the first base material 11 and is used as pressure loading end；
Apply electric signal to first electrode 21 and second electrode 22 respectively, makes to form electricity between first electrode 21 and second electrode 22
Pressure difference, to form pressure sensing capacitance between first electrode 21 and second electrode 22；
When there is push action on display screen, pressure loading end deforms upon, and the thickness in the gap 5 occurs with respect to normality thickness
Variation, and then the pressure sensing capacitance between first electrode 21 and second electrode 22 can also change, by pressure sensing capacitance
Variation the pressure data of pressing force on display screen is obtained by data processing.
First embodiment of the invention, as shown in figure 4, when there is pressing to apply on a display screen, the first base material 11 is as pressure
Power loading end deforms upon, while the second base material 12 can also deform upon, since pressing force directly acts in the first base material 11,
The deformation quantity of second base material 12 is less than the deformation quantity of the first base material 11, and the thickness in the gap 5 changes with respect to normality thickness,
Arrow direction as shown in Figure 4, the air in gap 5 are squeezed and are discharged from each air-flow through-hole 4.Normality thickness changes meaning
It the distance between first electrode 21 and second electrode 22 to change, the pressure sensing capacitance formed between them can also occur
The variation of pressure sensing capacitance, the pressure value of pressing force can be converted to by data processing by variation.It is applied when there is no pressing
When adding on a display screen, the first base material 11 and the second base material 12 return to normal, and state shown in Fig. 3 is restored to from state shown in Fig. 4,
The gap 5 returns to normal thickness, in the air sucking gap 5 outside the first base material 11 and the second base material 12.
According to the principle for forming capacitance, pressure sensing capacitance can be self-capacitance, can also be mutual capacitance.
In order to realize pressure detecting self-capacitance, to one group of application ginseng in all first electrodes 21 and all second electrodes 22
Examine current potential, to another group of application electric signal and detect electric quantity change thereon, to detect first electrode 21 and second electrode 22 it
Between formed pressure detecting self-capacitance variation.Apply electric signal and detect electric quantity change can be complete by data processing module thereon
At the data processing module can also provide reference potential.First embodiment of the invention is arranged three as shown in Figures 1 to 6
First electrode 21 and a second electrode 22, first electrode 21 distinguish face second electrode 22, and all first electrodes 21 are electrically connected
The self-capacitance data processing module of data processing module, the self-capacitance data processing module apply telecommunications to the electrode being electrically connected
Number and detect electric quantity change on electrode.All second electrodes 22 are electrically connected reference potential, in first electrode 21 and second electrode 22
Between formed pressure detecting self-capacitance.
In order to realize pressure detecting mutual capacitance, to the one of which electricity in all first electrodes 21 and all second electrodes 22
Pole applies drive signal, in the response signal that another group of collection is formed on by drive signal, to detect first electrode
The pressure detecting mutual capacitance variation formed between 21 and second electrode 22.Apply drive signal and collect response signal and may be used
Data processing module is completed, which is not only completed the variation of detecting pressure power detection mutual capacitance, additionally it is possible to by pressure
The variable quantity of detection mutual capacitance is processed into the pressure data that reflection applies pressing force on a display screen.Second embodiment of the invention,
As shown in fig. 7, three first electrodes 21 of setting and four second electrodes 22, first electrode 21 and second electrode 22 are mutually orthogonally
It lays, all first electrodes 21 are electrically connected the drive module for the data processing module that can send out drive signal, all second electricity
Pole 22 is electrically connected the sensing module for the data processing module that can collect response signal, first electrode 21 and second electrode 22 it
Between formed pressure detecting mutual capacitance.
The data processing module for being used alone as pressure detection data processing may be used in data processing module.Data processing mould
Block can also use the data processing module of display screen, both complete the data processing of display screen, also complete capacitive pressure detection
The data processing of device.Namely data processing module is not limited to physically the standalone module on either hardware, Ke Yishi
The function module for completing pressure detection data processing in independent hardware can also be more than two hardware module collaborations
Complete the function module of pressure detection data processing.It should be according to concrete application environment using suitable physical device or hardware
Configuration.
First embodiment of the invention and second embodiment, as shown in Figure 1, Figure 2 and Figure 7, the method build non-close
Gap 5 specifically uses following process：
The front edge of the first base material 11 is bonded closing with the front edge of the second base material 12 annular colloid 3；
The air-flow through-hole 4 that an at least one processing at least communication gap 5 is chosen in the first base material 11 and the second base material 12, between making
Gap 5 and the air communication outside the first base material 11 and the second base material 12.First embodiment of the invention and second embodiment, such as Fig. 2 and
Shown in Fig. 7, it is machined with air-flow through-hole 4 on the second base material 12, is communication gap 5, some air-flow through-holes 4 run through the second base material
12, some air-flow through-holes 4 run through the second base material 12 and second electrode 22.
The method improves the deformation quantity of pressure loading end by using different materials, specifically：
First embodiment of the invention, the Young's modulus for being used in the material of manufacture the first base material 11 are less than for manufacturing the second base material
The Young's modulus of 12 material；
The first base material 11 is attached to as pressure loading end below the display module of display screen.
The Young's modulus of the first base material 11 is less than the Young's modulus of the second base material 12, makes the first base as pressure loading end
Material 11 is easier to deform upon compared with the second base material 12, to increase the thickness change amplitude in gap 5, increases pressure sensing capacitance
Rate of change of capacitance, improve pressure detecting sensitivity.
Similarly, another specific method of the deformation quantity of pressure loading end is improved by using different materials is：
The Young's modulus for being used in the material of the second base material 12 of manufacture is less than the Young mould of the material for manufacturing the first base material 11
Amount；
Second base material 12 is attached to as pressure loading end below the display module of display screen, pressure inspection can be also increased
The rate of change of capacitance of capacitance is surveyed, pressure detecting sensitivity is improved.
In said program and first embodiment and second embodiment, the method can also be carried by dielectric media
High capacitance change rate, specifically：
Foam media filler is in the gap 5 made of material with dielectric constant higher than air, so as to further carry
High pressure detects the rate of change of capacitance of capacitance, improves pressure detecting sensitivity.Also have in addition, filling foam medium in gap 5
The flatness for helping improve the first base material 11 and the second base material 12, further improves pressure detecting sensitivity.
The dielectric constant can be high density polyurethane material higher than the material of air.
As shown in figure 5, when the capacitive pressure detection method of first embodiment of the invention is in TFT-LCD display screens
When, i.e. the display module of display screen is the display module 61 of thin film transistor liquid crystal display TFT-LCD, which further includes setting
One layer of backlight module 62 below the display module 61 of TFT-LCD is set, then the first base material 11 of first embodiment of the invention
It is attached to 62 lower section of backlight module as pressure loading end.Obviously when the second base material 12 is as pressure loading end, the second base material
12 should be attached to 62 lower section of backlight module.Using capacitive pressure detection method of the present invention, no matter backlight module 62 is provided with
Whether metal frame, capacitive pressure detection method can be worked normally without being influenced by backlight module 62, not need backlight mould
Block 62 provides the reference planes for forming pressure sensing capacitance.
As shown in fig. 6, when the capacitive pressure detection method of first embodiment of the invention is in AMOLED display screens,
The display module of the display screen is the display module 71 of active-matrix Organic Light Emitting Diode AMOLED, then the present invention first
The first base material 11 of embodiment is attached to the cathode plane of the display module 71 of AMOLED as pressure loading end.Obviously when the second base
When material 12 is as pressure loading end, the second base material 12 should be attached to the cathode plane of the display module 71 of AMOLED.Using this hair
Bright capacitive pressure detection method does not need AMOLED display screens and provides to form the reference planes of pressure sensing capacitance and can be formed
Pressure sensing capacitance.
Claims (10)
1. a kind of capacitive pressure detection method, for detecting the pressing force applied on a display screen, which includes can
The display module of deformation due to applying pressing on a display screen；It is characterized in that：
Choose the first base material and the second base material of the deformation that can be pressurized；
In a front setting at least first electrode for the first base material；In a front setting at least second electrode for the second base material；
The first base material and the second base material front are relatively fit together, face where making all first electrodes and all second electricity
Gap, and the gap and the air communication outside the first base material and the second base material are formed between face where pole；All first electrode institutes
The thickness in gap at a distance between face where face with all second electrodes, the first base material and the second base material be not pressurized deformation when
The thickness in gap is normality thickness；
At least one of the first base material and the second base material are used as pressure loading end, and pressure loading end is attached to the aobvious of display screen
Show below module, enables the deformation with the deformation of display screen of pressure loading end；
Apply electric signal to first electrode and second electrode respectively, makes to form voltage difference between first electrode and second electrode, from
And pressure sensing capacitance is formed between first electrode and second electrode；
When there is push action on display screen, pressure loading end deforms upon, and the thickness in the gap changes, and then first
Pressure sensing capacitance between electrode and second electrode changes, and the variation of pressure sensing capacitance is obtained by data processing
Obtain the pressure data of pressing force on display screen.
2. capacitive pressure detection method according to claim 1, it is characterised in that：
To one group of application drive signal in all first electrodes and all second electrodes, in another group of collection response signal, from
And detect the pressure detecting mutual capacitance variation formed between first electrode and second electrode.
3. capacitive pressure detection method according to claim 1, it is characterised in that：
To one group of application reference potential in all first electrodes and all second electrodes, to another group of application electric signal and detect
Electric quantity change thereon, to detect the pressure detecting self-capacitance formed between first electrode and second electrode variation.
4. capacitive pressure detection method according to claim 1, it is characterised in that：
The front edge of the first base material is bonded closing with the front edge of the second base material with annular colloid；
The air-flow through-hole that an at least one processing at least communication gap is chosen in the first base material and the second base material, makes gap and the
Air communication outside one base material and the second base material.
5. capacitive pressure detection method according to claim 1, it is characterised in that：
The Young's modulus of material for manufacturing the first base material is less than the Young's modulus of the material for manufacturing the second base material；
It is attached to below the display module of display screen using the first base material as pressure loading end.
6. capacitive pressure detection method according to claim 1, it is characterised in that：
The Young's modulus of material for manufacturing the second base material is less than the Young's modulus of the material for manufacturing the first base material；
It is attached to below the display module of display screen using the second base material as pressure loading end.
7. according to the capacitive pressure detection method described in claim 1,3 or 4, it is characterised in that：
Foam media filler is in gap made of material with dielectric constant higher than air.
8. capacitive pressure detection method according to claim 5, it is characterised in that：
The dielectric constant is high density polyurethane material higher than the material of air.
9. capacitive pressure detection method according to claim 1, it is characterised in that：
The display module of the display screen is the display module of thin film transistor liquid crystal display, which further includes being arranged thin
One layer of backlight module below film transistor liquid crystal display die set, then the first base material or the second base material are as pressure loading end
It is attached to below backlight module.
10. capacitive pressure detection method according to claim 1, it is characterised in that：
The display module of the display screen is the display module of active-matrix Organic Light Emitting Diode, then the first base material or
Two base materials are attached to the cathode plane of the display module of active-matrix Organic Light Emitting Diode as pressure loading end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810147597.0A CN108762539A (en) | 2018-02-12 | 2018-02-12 | capacitive pressure detection method |
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|---|---|---|---|
| CN201810147597.0A CN108762539A (en) | 2018-02-12 | 2018-02-12 | capacitive pressure detection method |
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|---|---|---|---|---|
| CN105278792A (en) * | 2015-04-13 | 2016-01-27 | 希迪普公司 | Pressure detecting module and touch input device including the same |
| CN105975138A (en) * | 2016-07-08 | 2016-09-28 | 厦门天马微电子有限公司 | Display module and display device |
| CN106125986A (en) * | 2016-07-04 | 2016-11-16 | 上海天马微电子有限公司 | Touch display panel and electronic equipment |
| US20170023818A1 (en) * | 2012-09-18 | 2017-01-26 | Touchplus Information Corp. | Pen writing on one-dimensional capacitive touch sensor |
| CN106855758A (en) * | 2015-12-09 | 2017-06-16 | 南昌欧菲光科技有限公司 | Touch display unit |
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2018
- 2018-02-12 CN CN201810147597.0A patent/CN108762539A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170023818A1 (en) * | 2012-09-18 | 2017-01-26 | Touchplus Information Corp. | Pen writing on one-dimensional capacitive touch sensor |
| CN105278792A (en) * | 2015-04-13 | 2016-01-27 | 希迪普公司 | Pressure detecting module and touch input device including the same |
| CN106855758A (en) * | 2015-12-09 | 2017-06-16 | 南昌欧菲光科技有限公司 | Touch display unit |
| CN106125986A (en) * | 2016-07-04 | 2016-11-16 | 上海天马微电子有限公司 | Touch display panel and electronic equipment |
| CN105975138A (en) * | 2016-07-08 | 2016-09-28 | 厦门天马微电子有限公司 | Display module and display device |
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Application publication date: 20181106 |