CN102253773A - Touch display device - Google Patents
Touch display device Download PDFInfo
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- CN102253773A CN102253773A CN2010101824443A CN201010182444A CN102253773A CN 102253773 A CN102253773 A CN 102253773A CN 2010101824443 A CN2010101824443 A CN 2010101824443A CN 201010182444 A CN201010182444 A CN 201010182444A CN 102253773 A CN102253773 A CN 102253773A
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- sensing element
- touch
- display apparatus
- touch control
- capacitance sensing
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Abstract
The invention discloses a touch display device, which comprises a display module, a circuit board and an insulating elastic piece, wherein the display module has a display surface and comprises a metallic back frame; the metallic back frame is opposite to the display surface; the circuit board is arranged on one side, away from the display surface, of the display module; the circuit board has a plurality of capacitance sensing elements which correspond to a plurality of corners of the display module; the insulating elastic piece is arranged between the circuit board and the display module; the capacitance sensing elements are spaced from the metallic back frame by a variable interval; and an induction capacitor between the capacitance sensing elements and the metallic back frame varies along with the variable interval. The touch display device has the advantage that: a touch sensing function can be realized on the premise of no influence on display quality without arranging of any touch element on the display surface of the display module.
Description
Technical field
The present invention relates to a kind of touch control display apparatus, relate in particular to the touch control display apparatus that a kind of display quality that shows module is not influenced by touch control component.
Background technology
In recent years, fast development along with every application such as infotech, wireless mobile communications and information household appliances, in order to reach more convenient, lighter and handyizatioier of volume and more humane purpose, the input media of many information products changes touch-control display panel (touch displaypanel) into by traditional keyboard or mouse etc.In general now touch-control display panel design, press the design concept classification of touch-control sensing pattern, roughly can divide into resistance-type, condenser type, optical profile type, sound wave type and electromagnetic type etc., be main flow with resistance-type and condenser type again wherein; By the structural group constituent class, then can be divided into two kinds of external hanging type (adhesive type) and in-building types (built-in type).
Yet the design of these touch-control display panels all is that arrangements of components that contact panel or touch-control are used is on the display surface of display panel.So the display quality of display surface is as easy as rolling off a log to become undesirable because of the configuration of contact panel or touch control component.In addition, in order to keep good light penetration character, contact panel and touch control component must be made of transparent material as far as possible.Therefore, how properly to integrate display panel and touch control component, improve procedure for producing, and prevent the generation of above-mentioned every unfavorable factor, real problem for demanding urgently overcoming on the present touch-control display panel production technology.
Summary of the invention
The purpose of this invention is to provide a kind of touch control display apparatus, touch control component is disposed at the display effect that shows the module back side and can not influence the demonstration module.
The invention provides a kind of touch control display apparatus, it comprises that one shows module, a circuit board and an insulation elastic component.Show that module has a display surface, and show that module comprises a metal back frame, and metal back frame is relative with display surface.Circuit board arrangement is in showing the side of module away from display surface.Circuit board has a plurality of capacitance sensing element, its corresponding a plurality of corners configuration that shows module.The insulation elastic component is disposed at circuit board and shows between the module.Capacitance sensing element and the metal back frame variable spacing of being separated by, and the inductance capacitance between capacitance sensing element and the metal back frame changes with variable spacing.
Based on the above, the present invention is in capacitance sensing element and show configuration insulation elastic component between the metal back frame of module, and the inductance capacitance that makes the capacitance sensing element sensing changes with the spacing of capacitance sensing element and metal back frame.Therefore, touch control display apparatus does not need to dispose the function that any touch control component can be issued to touch sensing in the prerequisite that does not influence display quality on the display surface that shows module.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and be described in detail below in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is for looking synoptic diagram on the touch control display apparatus of one embodiment of the invention;
Fig. 2 is the schematic side view of the touch control display apparatus of one embodiment of the invention;
Fig. 3 is the diagrammatic cross-section of the touch control display apparatus of another embodiment of the present invention;
Fig. 4 is the synoptic diagram of sensing method of touch control of the touch sensing device of one embodiment of the invention;
Fig. 5 is for looking synoptic diagram on the touch control display apparatus of further embodiment of this invention.
The main element symbol description:
Δ C: reference capacitance value; 110,210: show module;
110a, 210a: corner; 110b: display surface;
112,112 ': metal back frame; 112a: frame section;
120,220: circuit board; 122,222: capacitance sensing element;
124,224: the touch-control wafer; 126,226: line layer;
130: elastic insulating layer; 230: spring;
BL: the lower left corner; BR: the lower right corner;
C: inductance capacitance; Cm: resultant vector;
Cm1, Cm2: vector; Cmx, Cmy: component;
D: variable spacing; O: initial point;
P: touch position; TL: the upper left corner;
TR: the upper right corner; U, V, X, Y: axle;
100,100 ', 200: touch control display apparatus.
Embodiment
Fig. 1 is for looking synoptic diagram on the touch control display apparatus of one embodiment of the invention.Please refer to Fig. 1, touch control display apparatus 100 comprises a demonstration module 110 and a circuit board 120.Show that module 110 can be the demonstration module that is made of two-d display panel.For example, show that module 110 can be that a liquid crystal display module, an Electronic Paper show that module, an organic light emitting display module, a plasma show module etc.Then dispose a plurality of capacitance sensing element 122 and a touch-control wafer 124 on the circuit board 120.Touch-control wafer 124 for example is to be electrically connected to these capacitance sensing element 122 by the line layer 126 that is configured in the circuit board 120.And the allocation position of capacitance sensing element 122 for example is the corresponding a plurality of corner 110a that show module 110.
Fig. 2 is the schematic side view of the touch control display apparatus of one embodiment of the invention.Please be simultaneously with reference to Fig. 1 and Fig. 2, the element that has illustrated in showing Fig. 1 such as module 110, circuit board 120, touch control display apparatus 100 also includes an elastic insulating layer 130 in the present embodiment.And, show that module 110 for example has metal back frame 112.Elastic insulating layer 130 is disposed between capacitance sensing element 122 and the metal back frame 112.So, capacitance sensing element 122 and the metal back frame 112 variable spacing d of being separated by.In addition, when showing that module 110 is not touched, the size of variable spacing d for example is 1.5mm.So touch control display apparatus 100 only increases a little, thereby help to satisfy the demand of slimming on thickness.
What deserves to be mentioned is that the metal back frame 112 in the present embodiment can be connected to an earthing potential or a set potential.In addition, metal back frame 112 can be made up of a plurality of frame section 112a, and each frame section 112a and a capacitance sensing element 122 are established in opposite directions.Under such configuration, can produce an inductance capacitance C between one of them frame section 112a of each capacitance sensing element 122 and metal back frame 112.Generally speaking, the size of electric capacity is inversely proportional to the distance of the two conductor objects that constitute electric capacity, and the overlapping area of two conductor objects is directly proportional therewith.The overlapping area of capacitance sensing element 122 and metal back frame 112 is fixedly the time, and the inductance capacitance C that capacitance sensing element 122 is sensed will reflect the change of variable spacing d.The such principle of present embodiment utilization is reached the function of touch-control sensing.That is to say that present embodiment does not need any touch control component of configuration on display surface 110b, or makes the function that large-area sensing electrode is finished touch-control sensing.Therefore, show that the display quality that module 110 is provided can not be subjected to the interference of other elements, and help promoting the display effect of integral product.And the production process of touch control display apparatus 100 is also comparatively simplified.
Particularly, when the user pushes the demonstration module 110 of present embodiment, the strength of pushing will make variable spacing d produce change.Especially, more near the press points position suffered to push strength big more, therefore near will contract short more of press points position variable spacing d inductance capacitance C is increased more.Thus, the size distribution of inductance capacitance C will can be used as the reference frame of touch position.In addition, exist in order to make inductance capacitance C, variable spacing d is in fact greater than 0.That is to say that the capacitance sensing element 122 of present embodiment can not carried on the back frame 112 and can produce coupling effects with metal back frame 112 by contacting metal.
Except elastic insulating layer 130 being disposed at the design between capacitance sensing element 122 and the metal back frame 112, in other embodiment, also can between capacitance sensing element 122 and metal back frame 112, dispose spring as shown in Figure 3, or flexible members such as configuration pad, silica gel, it plays a part to provide support.That is to say that Fig. 3 is the diagrammatic cross-section of the touch control display apparatus of another embodiment of the present invention.Please refer to Fig. 3, touch control display apparatus 100 ' is similar to the touch control display apparatus 100 of Fig. 2 in fact, and its main difference is selecting for use of elastic component.That is to say, touch control display apparatus 100 ' adopt spring 230 as the spacer member between capacitance sensing element 122 and the metal back frame 112 ' so that variable spacing d change with the state that applies of external force.In addition, the metal back frame 112 ' of present embodiment structurally has whole continuous loading end, but not is made up of a plurality of frame section, and wherein loading end is relative with display surface 110b.What deserves to be mentioned is that in the present embodiment, the material of spring 230 is the insulation material, it plays a part to provide support, so the configuration of spring 230 can not influence the capacitance coupling effect between capacitance sensing element 122 and the metal back frame 112 '.In other words, the user pushes and shows that module 110 can make spring 230 shorten and change variable spacing d, and then inductance capacitance C is also changed, and wherein the variation of inductance capacitance C promptly can be used as touch sense signals to realize the touch-control sensing function.
Particularly, the spring 230 in the previous embodiment is only used for illustrating with elastic insulating layer 130, is not in order to limit the present invention.In other embodiment, can also be rubber-like members such as elastomeric pad, silica gel material in order to be supported in the insulation elastic component that shows between module 110 and the circuit board 120.That is to say, only will adopt insulation and rubber-like member to be disposed at and show the function that just can reach demonstration and touch-control sensing between module 110 and the circuit board 120 simultaneously.
By Fig. 2 and Fig. 3 as can be known, the variable spacing d between each capacitance sensing element 122 and metal back frame 112, metal back frame 112 ' that is arranged so that of elastic insulating layer 130 and spring 230 changes along with user's touch action.The user touches when showing module 110, shows that module 110 will tilt a little and makes that center of gravity takes place to be offset and variable spacing d is changed.In addition, under the different situation of user's touch position, the variation situation of variable spacing d also can be different.For example, generally bear bigger pressure, thereby the degree of dwindling of variable spacing d is comparatively remarkable apart from the zone that touch position is near more.On the contrary, the pressure that bear in the zone far away more apart from touch position is less, so the degree of dwindling of variable spacing d is slight more.
The size of inductance capacitance C is inversely proportional to the variable spacing d of capacitance sensing element 122 and metal back frame 112, metal back frame 112 ' in fact, so in above embodiment, the variation of inductance capacitance C can be reacted the variation situation of variable spacing d.That is to say that the variable quantity of inductance capacitance C can be used as and shows that module 110 defines the reference frame of touch position.Particularly, when carrying out touch-control sensing, the capacitance sensing element 122 of corresponding each corner 110a for example can be carried out sensing seriatim.Especially, when one of them capacitance sensing element 122 was carried out sensing, remaining for example can be connected to earthing potential.This measure can avoid the electric capacity between the capacitance sensing element 122 interfering with each other.
Fig. 4 is the synoptic diagram of sensing method of touch control of the touch sensing device of one embodiment of the invention.Please be simultaneously with reference to Fig. 1, Fig. 2 and Fig. 4, for the corner 110a of clear expression different azimuth, Fig. 4 is defined as upper left corner TL, upper right corner TR, lower left corner BL and lower right corner BR respectively with corner 110a.At this, the straight line of upper left corner TL and lower right corner BR for example is defined as the U axle, and the straight line of upper right corner TR and lower left corner BL for example is defined as the V axle.In addition, X-axis and Y-axis are expressed as long axis direction and the short-axis direction that shows module 110 respectively, and initial point O is then for showing the center of module 110.
When the user does not touch demonstration module 110, show that the center of gravity of module 110 for example is to be positioned at initial point O.At this moment, the inductance capacitance C that senses of all capacitance sensing element 122 for example is an initial value.The user touches when showing module 110, and the distribution of variable spacing d will be different with preset state, so all capacitance sensing element 122 can sense another inductance capacitance C, it is a sensing value.If the difference of sensing value and initial value is calculated, can judge that then the center of gravity that shows module 110 by direction and size that initial point O generation is offset, promptly calculates the coordinate of touch position P.In other words, present embodiment can provide a kind of simple sensing method of touch control.
In the present embodiment, the difference of sensing value and initial value in fact will be according to showing that module 110 default touch-control sensing resolutions (touch sensing resolution) quilt normalizations (normalized) are to obtain reference capacitance value Δ C.Suppose to show that module 110 is pre-defined on X-axis goes out equally spaced 320 units, and pre-definedly on Y-axis go out equally spaced 240 units.Therefore, the distance range planted agent of (upper left corner TL, upper right corner TR, lower left corner BL and lower right corner BR) marks off 200 units to each corner along U axle or V axle by initial point O, and promptly the resolution of initial point O along U axle or V axle to each corner should be 200.Therefore, in order to meet such resolution, after finishing, touch control display apparatus 100 assemblings will measure sensing value and maximum difference between the initial value and minimum difference earlier in each capacitance sensing element 122 under the touch action, and with maximum different value is regular turns to+100, turn to-100 with as with reference to capacitance Δ C and the minimum difference value is regular.
As shown in Figure 4, the reference capacitance value Δ C that user's touch action makes the capacitance sensing element 122 of upper left corner TL record is-50, the reference capacitance value Δ C that the capacitance sensing element 122 of upper right corner TR records is-30, the reference capacitance value Δ C that the capacitance sensing element 122 of lower left corner BL records is 40, and the reference capacitance value Δ C that the capacitance sensing element 122 of lower right corner BR records is 50.By above numerical value as can be known, reference capacitance value Δ C has produced the vectorial Cm2 that is pointed to lower right corner BR by initial point O on the U axle, and its size is 100.In addition, reference capacitance value Δ C has produced the vectorial Cm1 that is pointed to lower left corner BL by initial point O on the V axle, and its size is 70.The resultant vector Cm of vector Cm1 and vectorial Cm2 can react touch position P.
For example, resultant vector Cm can represent the relation of touch position P with respect to initial point O at component Cmx on the X-axis and the component Cmy on Y-axis.So with present embodiment, the size of component Cmx and component Cmy is respectively 24 and 102.If initial point O is (160,120) with respect to the coordinate of upper left corner TL, then touch position P with respect to the coordinate of upper left corner TL be (160+24,120+102), just (184,222).
The resultant vector that these reference capacitance value Δs C is calculated that is to say that the reference capacitance value Δ C of different corners can change with the variation of touch position, so can react touch position P.In addition, in other enforceable account forms, calculate the mode of touch position P and also can earlier the difference between sensing value and the initial value be calculated earlier.And, obtain the distribution scenario of these differences, then again with the distribution scenario normalization of these differences with basis for estimation as touch position P.
In addition, touch control display apparatus 100 ' top view in fact can be with reference to the top view of the touch control display apparatus 100 of Fig. 1.As shown in Figure 1, the design of the foregoing description all makes the quantity of capacitance sensing element 122 equal to show the quantity of the corner 110a of module 110.But, as long as the quantity of capacitance sensing element 122 equals to show the positive integer spirit all according to the invention doubly of quantity of the corner 110a of module 110.
For example, Fig. 5 is for looking synoptic diagram on the touch control display apparatus of further embodiment of this invention.Please refer to Fig. 5, touch control display apparatus 200 comprises a demonstration module 210 and a circuit board 220.Show that module 210 is the demonstration module that planar display surface constituted.For example, show that module 210 can be that a liquid crystal display module, an Electronic Paper show that module, an organic light emitting display module, a plasma show module etc.Then dispose a plurality of capacitance sensing element 222 and a touch-control wafer 224 on the circuit board 220.Touch-control wafer 224 for example is to be electrically connected to these capacitance sensing element 222 by the line layer 226 that is configured in the circuit board 220.And the allocation position of capacitance sensing element 222 for example is the corresponding a plurality of corner 210a that show module 210.
What deserves to be mentioned is that in the present embodiment, the quantity of capacitance sensing element 222 is the twice of the quantity of corner 210a, and two capacitance sensing element, 222 corresponding one of them corner 210a and disposing.That is to say that the quantity of corner 210a can equate with the quantity of capacitance sensing element 222 or is different.When carrying out the touch-control sensing function, the signal that several capacitance sensing element 222 of corresponding same corner 210a are sensed can be simultaneously as the basis for estimation of position of touch.In one embodiment, the mean value of the inductance capacitance that sensed of several capacitance sensing element 222 of corresponding same corner 210a can be represented the touching signals of this corner 210a.Certainly, in other embodiment, the inductance capacitance that several capacitance sensing element 222 sensed of corresponding same corner 210a can adopt direct addition or be used as the basis for estimation of position of touch in modes such as special ratios additions.
In sum, the present invention is disposed at touch control component and shows that module deviates from a side of display surface.So, show that the display effect of module can not be subjected to the influence of the setting of touch control component.That is to say that touch control display apparatus of the present invention can have desirable display quality.In addition, thus the present invention utilizes several capacitance sensing element just can provide the touch-control sensing function can simplify the element design of touch control display apparatus.
Though the present invention discloses as above with embodiment; but it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; can suitably change or be equal to replacement, so protection scope of the present invention should be as the criterion with the scope that claims were defined.
Claims (10)
1. a touch control display apparatus is characterized in that, comprising:
One shows to have a display surface by module, and described demonstration module comprises a metal back frame, and described metal back frame is relative with described display surface;
One circuit board is disposed at the side of described demonstration module away from described display surface, and described circuit board has a plurality of capacitance sensing element, a plurality of corners configuration of corresponding described demonstration module; And
One insulation elastic component, be disposed between described circuit board and the described demonstration module, described a plurality of capacitance sensing element and the described metal back frame variable spacing of being separated by, and the inductance capacitance between described a plurality of capacitance sensing element and the described metal back frame changes with described variable spacing.
2. touch control display apparatus according to claim 1 is characterized in that described variable spacing is greater than 0.
3. touch control display apparatus according to claim 1 is characterized in that, described insulation elastic component is a spring, a silica gel or a pad.
4. touch control display apparatus according to claim 1 is characterized in that, described insulation elastic component is an elastic insulating layer.
5. touch control display apparatus according to claim 1 is characterized in that, the quantity of described capacitance sensing element equal described demonstration module described a plurality of corners quantity positive integer doubly.
6. touch control display apparatus according to claim 1 is characterized in that, the quantity of described capacitance sensing element is the twice of quantity in described a plurality of corners of described demonstration module, and two corresponding one of them corners of capacitance sensing element and disposing.
7. touch control display apparatus according to claim 1 is characterized in that, also comprises a touch-control wafer, be disposed on the described circuit board, and described touch-control wafer electrically connects described a plurality of capacitance sensing element.
8. touch control display apparatus according to claim 1 is characterized in that, described metal back frame is connected to a set potential or an earthing potential.
9. touch control display apparatus according to claim 1 is characterized in that described metal back frame comprises a plurality of frame sections, and each described frame section and one of them capacitance sensing element are established in opposite directions.
10. touch control display apparatus according to claim 1 is characterized in that, described metal back frame has a whole continuous loading end, and described loading end is relative with described display surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101824443A CN102253773A (en) | 2010-05-19 | 2010-05-19 | Touch display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101824443A CN102253773A (en) | 2010-05-19 | 2010-05-19 | Touch display device |
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| CN102253773A true CN102253773A (en) | 2011-11-23 |
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| CN2010101824443A Pending CN102253773A (en) | 2010-05-19 | 2010-05-19 | Touch display device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103713206A (en) * | 2012-09-28 | 2014-04-09 | 名硕电脑(苏州)有限公司 | Capacitor touch screen automatic test device |
| CN103995630A (en) * | 2013-02-15 | 2014-08-20 | Nlt科技股份有限公司 | Display device with touch sensor, control system and control method thereof |
| CN104407752A (en) * | 2014-10-29 | 2015-03-11 | 北京智谷睿拓技术服务有限公司 | Pressure detecting method and equipment |
| CN105468198A (en) * | 2015-12-09 | 2016-04-06 | 深圳市骏达光电股份有限公司 | Touch display screen and portable electronic product |
| CN107682002A (en) * | 2017-10-13 | 2018-02-09 | 广东美的厨房电器制造有限公司 | Touch display unit and household electrical appliance |
| CN110922938A (en) * | 2019-11-25 | 2020-03-27 | 烟台德邦科技有限公司 | Preparation method of low-precipitation LCM (liquid Crystal Module) supporting silica gel |
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| WO2009123388A1 (en) * | 2008-04-02 | 2009-10-08 | Sang-Youl Han | Capacitive touch screen |
| US20100024573A1 (en) * | 2008-07-29 | 2010-02-04 | Dodge Daverman | Single Sided Capacitive Force Sensor for Electronic Devices |
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| CN1527933A (en) * | 2001-04-13 | 2004-09-08 | 3M创新有限公司 | Method and apparatus for force-based touch input |
| CN101361035A (en) * | 2006-07-22 | 2009-02-04 | 达兰·克赖特 | Pressure sensitive inductive detector for use in user interfaces |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713206A (en) * | 2012-09-28 | 2014-04-09 | 名硕电脑(苏州)有限公司 | Capacitor touch screen automatic test device |
| CN103713206B (en) * | 2012-09-28 | 2016-03-23 | 名硕电脑(苏州)有限公司 | Capacitor touch screen automatic test device |
| CN103995630A (en) * | 2013-02-15 | 2014-08-20 | Nlt科技股份有限公司 | Display device with touch sensor, control system and control method thereof |
| CN104407752A (en) * | 2014-10-29 | 2015-03-11 | 北京智谷睿拓技术服务有限公司 | Pressure detecting method and equipment |
| CN104407752B (en) * | 2014-10-29 | 2018-10-02 | 北京智谷睿拓技术服务有限公司 | A kind of pressure detection method and equipment |
| CN105468198A (en) * | 2015-12-09 | 2016-04-06 | 深圳市骏达光电股份有限公司 | Touch display screen and portable electronic product |
| CN107682002A (en) * | 2017-10-13 | 2018-02-09 | 广东美的厨房电器制造有限公司 | Touch display unit and household electrical appliance |
| CN110922938A (en) * | 2019-11-25 | 2020-03-27 | 烟台德邦科技有限公司 | Preparation method of low-precipitation LCM (liquid Crystal Module) supporting silica gel |
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Application publication date: 20111123 |