CN203733090U - Self-capacitance touch screen and touch display device - Google Patents
Self-capacitance touch screen and touch display device Download PDFInfo
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- CN203733090U CN203733090U CN201320471485.3U CN201320471485U CN203733090U CN 203733090 U CN203733090 U CN 203733090U CN 201320471485 U CN201320471485 U CN 201320471485U CN 203733090 U CN203733090 U CN 203733090U
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Abstract
An embodiment of the utility mode provides a self-capacitance touch screen which comprises multiple self-capacitance touch sensing electrodes, a touch control circuit, an insulating layer and an isolating electrode. The self-capacitance touch sensing electrodes are arranged to be of a single layer, the touch control circuit is used for driving the self-capacitance touch sensing electrodes, detecting self-capacitance changes of the same and determining touch positions according to the self-capacitance changes, the insulating layer covers the surfaces of the self-capacitance touch sensing electrodes, and the isolating electrode covers the surface of the insulating layer and is connected with the touch control circuit. By the self-capacitance touch screen, accuracy of touch detection can be improved.
Description
Technical field
The utility model relates to touch technology field, relates in particular to a kind of self-capacitance formula touch-screen and a kind of touch control display apparatus that comprises self-capacitance formula touch-screen.
Background technology
Current, self-capacitance formula touch-screen is widely applied in the electronic product such as intelligent machine and panel computer.But existing individual layer self-capacitance formula touch-screen, in by weight, has the problem of touch position coordinates skew and wrong report.In addition when, liquid crystal display module is worked, can cause interference to touching to detect.These all can affect and touch the precision detecting.
Utility model content
In view of this, disclosure embodiment provides a kind of self-capacitance formula touch-screen and a kind of touch control display apparatus that comprises self-capacitance formula touch-screen, can improve and touch the precision detecting.
The self-capacitance formula touch-screen that disclosure embodiment provides, comprising:
Multiple self-capacitance formula touch sensible electrodes, described multiple self-capacitance formula touch sensible electrodes are arranged to individual layer;
Touch control circuit, for driving described multiple self-capacitance formula touch sensible electrode, the self-capacitance that detects described multiple self-capacitance formula touch sensible electrodes changes, and changes and determine touch location based on described self-capacitance;
Insulation course, described insulation course covers the surface of described multiple self-capacitance formula touch sensible electrodes; And
Isolated electrode, described isolated electrode covers the surface of described insulation course, and described isolated electrode connects described touch control circuit.
Preferably, described touch control circuit is configured to drive described isolated electrode with fixed level; Or drive described isolated electrode according to the driving signal of described multiple self-capacitance formula touch sensible electrodes.
The pattern of described self-capacitance formula touch sensible electrode can be triangle.
The material of described isolated electrode can be tin indium oxide (ITO) or Graphene.
The touch control display apparatus that disclosure embodiment provides, comprising:
The self-capacitance formula touch-screen of aforementioned any one; And
Liquid crystal display module.
According to the scheme of disclosure embodiment, on the surface of individual layer self-capacitance formula touch sensible electrode, insulation course and isolated electrode are set, wherein insulation course covers the surface of touch sensible electrode, and isolated electrode covers the surface of insulation course.By driving isolation electrode, can avoid self-capacitance formula touch-screen by weight time, the self-capacitance of touch sensible electrode changes, and solves the error that weight causes; The interference causing can also shield the work of liquid crystal display module time, touches thereby improve the precision detecting.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in disclosure embodiment, the accompanying drawing using in below embodiment being described is briefly described.Obviously, the accompanying drawing of introducing is below only embodiment more of the present utility model, for those skilled in the art, is not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 shows the diagrammatic cross-section of existing self-capacitance formula touch-screen;
While showing existing self-capacitance formula touch-screen by weight, there is the diagrammatic cross-section of deformation in Fig. 2;
Fig. 3 shows according to the diagrammatic cross-section of the self-capacitance formula touch-screen of disclosure embodiment mono-, two and three;
While showing according to the self-capacitance formula touch-screen of disclosure embodiment mono-, two and three by weight, there is the diagrammatic cross-section of deformation in Fig. 4; And
Fig. 5 shows according to the pattern of the self-capacitance formula touch sensible electrode of the self-capacitance formula touch-screen of disclosure embodiment tetra-.
Embodiment
For object of the present disclosure, feature and advantage can more be become apparent, below in conjunction with the accompanying drawing in disclosure embodiment, the technical scheme of disclosure embodiment is described.Obviously, described embodiment is only a part of embodiment of the present utility model.Based on disclosure embodiment, any other embodiment that those skilled in the art obtain under the prerequisite of not paying creative work, should belong to protection domain of the present utility model.For ease of explanation, represent that the sectional view of structure is disobeyed general ratio and done local amplification.And accompanying drawing is exemplary, it should not limit protection domain of the present utility model.In addition in actual fabrication, should comprise, the three-dimensional dimension of length, width and the degree of depth.
Inventor's discovery of the present utility model, existing individual layer self-capacitance formula touch-screen, in by weight, has the problem of touch position coordinates skew and wrong report, and impact touches the precision of detection.
Fig. 1 shows the diagrammatic cross-section of existing self-capacitance formula touch-screen, comprises the touch sensible electrode 11 and 13 of cover plate (Cover Lens) and cover plate below.Touch sensible electrode below is liquid crystal display module, between touch sensible electrode and liquid crystal display module, has certain interval, has coupling capacitance Clm and Cln.Coupling capacitance Clm and Cln form a part for the self-capacitance of touch sensible electrode.
While showing existing self-capacitance formula touch-screen by weight, there is the diagrammatic cross-section of deformation in Fig. 2.When self-capacitance formula touch-screen generation touch event shown in Fig. 1 and the dynamics of pressing are larger, may there is deformation in screen body.As shown in Figure 2, because touch sensible electrode changes to the distance of liquid crystal display module, coupling capacitance Clm and Cln become Clm ' and Cln '.Now touching the self-capacitance obtaining in detecting changes, except the Ctm and Ctn of touch event itself, the variation of coupling capacitance in addition (Clm '-Clm) and (Cln '-Cln), the variation of coupling capacitance can cause the touch position coordinates calculating to depart from actual touch position.
On the other hand, there is no human body touch, only having the hard thing of insulation firmly press touch-screen in the situation that, due to the variation of coupling capacitance (Clm '-Clm) and (Cln '-Cln), it is touch event that touch detection circuit may be reported this event by mistake.
In addition,, due to the existence of coupling capacitance, when the work of liquid crystal display module, can cause interference to touching to detect.This also can reduce the precision that touches detection.
Embodiment mono-
Fig. 3 shows according to the diagrammatic cross-section of the self-capacitance formula touch-screen of disclosure embodiment mono-.As shown in Figure 3, disclosure embodiment mono-provides a kind of self-capacitance formula touch-screen, comprising:
Multiple self-capacitance formula touch sensible electrodes, described multiple self-capacitance formula touch sensible electrodes are arranged to individual layer;
Touch control circuit, for driving described multiple self-capacitance formula touch sensible electrode, the self-capacitance that detects described multiple self-capacitance formula touch sensible electrodes changes, and changes and determine touch location based on described self-capacitance;
Insulation course, described insulation course covers the surface of described multiple self-capacitance formula touch sensible electrodes; And
Isolated electrode, described isolated electrode covers the surface of described insulation course, and described isolated electrode connects described touch control circuit.
As shown in Figure 3, as an example, described multiple self-capacitance formula touch sensible electrodes comprise induction electrode 31 and 33, and induction electrode 31 and 33 forms coupling capacitance Cim and Cin with isolated electrode respectively, and isolated electrode and liquid crystal display module form coupling capacitance Cil.
The scheme that adopts disclosure embodiment to provide, can avoid self-capacitance formula touch-screen by weight time, the self-capacitance of touch sensible electrode changes, and solves the error that weight causes; The interference causing can also shield the work of liquid crystal display module time, touches thereby improve the precision detecting.
Embodiment bis-
In the self-capacitance formula touch-screen providing at disclosure embodiment bis-, described touch control circuit is configured to drive described isolated electrode with fixed level.
Please refer to Fig. 3, touch while detection, touch sensible electrode 31 and 33 discharges and recharges isolated electrode by Cim and Cin, and Cim and Cin form a part for the self-capacitance of touch sensible electrode 31 and 33.
While showing according to the self-capacitance formula touch-screen of disclosure embodiment bis-by weight, there is the diagrammatic cross-section of deformation in Fig. 4.When touch-screen is during by weight, as shown in Figure 4, cover plate generation deformation, due to cover plate and touch sensible electrode 31 and 33, insulation course, isolated electrode close-packed arrays, all can there is corresponding deformation in touch sensible electrode 31 and 33, insulation course and isolated electrode.In addition,, because there is certain interval liquid crystal display module top, the distance between liquid crystal display module and isolated electrode diminishes.Therefore, Cim and Cin are substantially constant, and Cil increases.
Because Cim and Cin are parts for the self-capacitance of touch sensible electrode 31 and 33, and Cil is not, therefore, touches the Cil that the result detecting can not comprise that weight causes and changes.In the situation that there is no human body touch, only having the hard thing of insulation firmly to press touch-screen, can not detect self-capacitance and change.
The description of the present embodiment miscellaneous part please refer to other embodiment, no longer repeats here.
Embodiment tri-
In the self-capacitance formula touch-screen providing at disclosure embodiment tri-, described touch control circuit is configured to drive described isolated electrode according to the driving signal of described multiple self-capacitance formula touch sensible electrodes.
Particularly, described touch control circuit can be configured to use the signal consistent with the drive signal waveform of current detected touch sensible electrode to carry out driving isolation electrode, makes to have and waveform identical on current detected touch sensible electrode in isolated electrode.Like this, isolated electrode and detected touch sensible electrode synchronously change, and detected touch sensible electrode can not discharge and recharge isolated electrode.It is the part that Cim and Cin do not belong to the self-capacitance of touch sensible electrode 31 and 33.Certainly a part for the self-capacitance that, Cil neither touch sensible electrode 31 and 33.Therefore,, when touch-screen is during by weight, the coupling capacitance of touch sensible electrode below can not affect the testing result of self-capacitance.
The description of the present embodiment miscellaneous part please refer to other embodiment, no longer repeats here.
Embodiment tetra-
Fig. 5 shows according to the pattern of the self-capacitance formula touch sensible electrode of the self-capacitance formula touch-screen of disclosure embodiment tetra-.As shown in Figure 5, the pattern of self-capacitance formula touch sensible electrode can be triangle.
In addition, the material of described isolated electrode can be tin indium oxide (ITO) or Graphene.
The description of the present embodiment miscellaneous part please refer to other embodiment, no longer repeats here.
Disclosure embodiment also provides a kind of touch control display apparatus, comprising:
The self-capacitance formula touch-screen of aforementioned any one; And
Liquid crystal display module.
What in this instructions, each embodiment stressed is the difference of other embodiment, same or analogous part reference mutually between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make those skilled in the art can realize or use the utility model.To be apparent for a person skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from scope of the present utility model, realize in other embodiments.Therefore, the utility model should not be restricted to disclosed these embodiment, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a self-capacitance formula touch-screen, is characterized in that, comprising:
Multiple self-capacitance formula touch sensible electrodes, described multiple self-capacitance formula touch sensible electrodes are arranged to individual layer;
Touch control circuit, for driving described multiple self-capacitance formula touch sensible electrode, the self-capacitance that detects described multiple self-capacitance formula touch sensible electrodes changes, and changes and determine touch location based on described self-capacitance;
Insulation course, described insulation course covers the surface of described multiple self-capacitance formula touch sensible electrodes; And
Isolated electrode, described isolated electrode covers the surface of described insulation course, and described isolated electrode connects described touch control circuit.
2. self-capacitance formula touch-screen as claimed in claim 1, is characterized in that,
Described touch control circuit is configured to drive described isolated electrode with fixed level.
3. self-capacitance formula touch-screen as claimed in claim 1, is characterized in that,
Described touch control circuit is configured to drive described isolated electrode according to the driving signal of described multiple self-capacitance formula touch sensible electrodes.
4. self-capacitance formula touch-screen as claimed in claim 1, is characterized in that,
The pattern of described self-capacitance formula touch sensible electrode is triangle.
5. self-capacitance formula touch-screen as claimed in claim 1, is characterized in that,
The material of described isolated electrode is tin indium oxide or Graphene.
6. a touch control display apparatus, is characterized in that, comprising:
Self-capacitance formula touch-screen as described in claim 1-5 any one; And
Liquid crystal display module, described liquid crystal display module is positioned at the below of described multiple self-capacitance formula touch sensible electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320471485.3U CN203733090U (en) | 2013-08-02 | 2013-08-02 | Self-capacitance touch screen and touch display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320471485.3U CN203733090U (en) | 2013-08-02 | 2013-08-02 | Self-capacitance touch screen and touch display device |
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| CN203733090U true CN203733090U (en) | 2014-07-23 |
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| CN201320471485.3U Expired - Lifetime CN203733090U (en) | 2013-08-02 | 2013-08-02 | Self-capacitance touch screen and touch display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399678A (en) * | 2013-08-02 | 2013-11-20 | 敦泰科技有限公司 | Self-capacitance touch screen and touch display device |
| CN110244883A (en) * | 2015-02-05 | 2019-09-17 | 宸鸿光电科技股份有限公司 | The touch control method of Organic Light Emitting Diode touch-control display panel |
-
2013
- 2013-08-02 CN CN201320471485.3U patent/CN203733090U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399678A (en) * | 2013-08-02 | 2013-11-20 | 敦泰科技有限公司 | Self-capacitance touch screen and touch display device |
| CN110244883A (en) * | 2015-02-05 | 2019-09-17 | 宸鸿光电科技股份有限公司 | The touch control method of Organic Light Emitting Diode touch-control display panel |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FOCAL TECH ELECTRONICS TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: FOCALTECH SYSTEMS CO., LTD. Effective date: 20150820 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150820 Address after: Mailbox No. 2804 Cayman Islands cricket square Dakaiman KY1-1112, green willow four storey building Patentee after: FOCALTECH ELECTRONICS, Ltd. Address before: Grand Cayman, Cayman Islands in George County, South Church Street agrand Mansion Patentee before: FOCALTECH SYSTEMS, Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
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| CX01 | Expiry of patent term |