CN100570444C - Capacitive touch control plate and preparation method thereof - Google Patents
Capacitive touch control plate and preparation method thereof Download PDFInfo
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- CN100570444C CN100570444C CNB2008100289459A CN200810028945A CN100570444C CN 100570444 C CN100570444 C CN 100570444C CN B2008100289459 A CNB2008100289459 A CN B2008100289459A CN 200810028945 A CN200810028945 A CN 200810028945A CN 100570444 C CN100570444 C CN 100570444C
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Abstract
A kind of capacitive touch control plate, comprise first transparent insulating layer in order, first transparent conductive material layer that comprises the X-axis stitching, second transparent insulating layer, second transparent conductive material layer and the 3rd transparent insulating layer that comprise the Y-axis stitching, the X-axis stitching has the first stitching contact, the Y-axis stitching has the second stitching contact, it is characterized in that: described second transparent insulating layer and comprise between first transparent conductive material layer of X-axis stitching and be provided with the first transparent, oriented layer, second transparent insulating layer and comprise between second transparent conductive material layer of Y-axis stitching and be provided with the second transparent, oriented layer, second transparent insulating layer is made of liquid crystal.The present invention also provides the method for making of above-mentioned capacitive touch control plate.The present invention can realize the two-dimensional localization function, and its second transparent insulating layer equivalence is a wave plate, can make the linearly polarized light that incides Trackpad after by Trackpad, become positive circularly polarized light or elliptically polarized light, can overcome the blind area phenomenon that some certain applications exists.
Description
Technical field
The present invention relates to be used for man-machine between mutual input media, specifically, relate to a kind of capacitive touch control plate that can realize the two-dimensional localization function and preparation method thereof.
Background technology
At present, Trackpad combines with LCD as a kind of input media, be widely used on the various electronic products, as car and boat product, common query system, household electrical appliance and various portable data assistance electronic product (as high-end pdas (Personal Digital Assistant, personal digital assistant), smart mobile phone, digital camera, game machine etc.).
The light that LCD is sent is generally linearly polarized light, because existing Trackpad can not change polarization state of light usually, therefore the light by Trackpad still is linearly polarized light, and there are some problems in actual applications in this.
For example, the people of many trips, or outwork person (particularly car and boat driver) relatively need to wear sun polaroid glasses, the most of sunshine of filtering, and the protection eyes are guaranteed to travel, job safety.But, watch LCD (the LCD front is provided with above-mentioned Trackpad) by sun polaroid glasses, there is the blind area in some angle, promptly can't see the displaying contents of LCD by glasses.Suppose that the polarizing axis of polaroid is P1 before the LCD, after light is by polaroid outgoing before the LCD, formed that the light by Trackpad still be the linearly polarized light that vibrates along the P1 direction along the linearly polarized light of P1 direction vibration; And the equivalence of sun polaroid glasses is a linear polarizer, supposes that polarizing axis is P2, and P1 and P2 form angle theta; Suppose that from the line polarisation light intensity of LCD outgoing be I
1, be I through the light intensity behind the sun polaroid glasses
2,, I is arranged according to Malus law
2=I
1* cos
2θ, then with the change of beholder's viewing location, θ also changes; When θ=0 °, promptly during P1//P2, I
2=I
1, printing opacity is the strongest, can see the displaying contents of LCD fully clearly by glasses; When θ=90 °, promptly during P1 ⊥ P2, I
2=0, printing opacity is zero, can't see the displaying contents of LCD by glasses, Here it is blind area.
In addition, linearly polarized light makes eyes feel under the weather easily, causes visual fatigue.
Summary of the invention
Technical matters to be solved by this invention provides and a kind ofly can realize the two-dimensional localization function and can change capacitive touch control plate of polarization state and preparation method thereof.The technical scheme that adopts is as follows:
A kind of capacitive touch control plate, comprise first transparent insulating layer in order, first transparent conductive material layer that comprises the X-axis stitching, second transparent insulating layer, second transparent conductive material layer and the 3rd transparent insulating layer that comprise the Y-axis stitching, the X-axis stitching has the first stitching contact, the Y-axis stitching has the second stitching contact, it is characterized in that: described second transparent insulating layer and comprise between first transparent conductive material layer of X-axis stitching and be provided with the first transparent, oriented layer, second transparent insulating layer and comprise between second transparent conductive material layer of Y-axis stitching and be provided with the second transparent, oriented layer, second transparent insulating layer is made of liquid crystal, and second transparent insulating layer can make the linearly polarized light of incident become positive circularly polarized light or elliptically polarized light when outgoing.
Towards the one side of second transparent insulating layer after treatment, have the directed groove of rule on this face, thereby possess orientating function on the above-mentioned first transparent, oriented layer and the second transparent, oriented layer; By the effect of the first transparent, oriented layer and the second transparent, oriented layer to the liquid crystal molecule in second transparent insulating layer, long axis of liquid crystal molecule in above-mentioned second transparent insulating layer is arranged in order along directed groove, long axis of liquid crystal molecule in second transparent insulating layer is all arranged along same direction, constituted a uniaxial crystal structure.The first transparent, oriented layer and the second transparent, oriented layer can adopt polyimide or magnesium oxide to make.
When a branch of wavelength from LCD outgoing linearly polarized light that is λ impinges perpendicularly on second transparent insulating layer (thickness of second transparent insulating layer is d), be broken down into along former direction and propagate but mutually perpendicular o light of direction of vibration and e light, corresponding refractive index is respectively n
oAnd n
e, the refringence absolute value is | n
o-n
e| (promptly | Δ n|), through the respective phase retardation that produces behind second transparent insulating layer be δ=(2 π/λ) * | n
o-n
e| * d, that is to say that the second transparent insulating layer equivalence is a wave plate, can change the polarization of incident light attitude, also do corresponding change by the polarization state of light of above-mentioned capacitive touch control plate; When δ=(2m+1) * (pi/2) (this moment d=((2m+1)/| n
o-n
e|) * (λ/4), promptly | Δ n|d=(2m+1) * (λ/4)), wherein m is 〉=0 integer, the second transparent insulating layer equivalence is a quarter-wave plate.
If inciding the polarization direction P1 of linearly polarized light of second transparent insulating layer and the orientation direction P3 angle of two transparent, oriented layers is α; When α ≠ 0 ° and α ≠ 90 ° and α ≠ 45 °, then emergent light is an elliptically polarized light; When α=45 °, emergent light is positive circularly polarized light; When α=0 ° or α=90 °, emergent light still is a linearly polarized light.Preferred α of the present invention ≠ 0 ° and α ≠ 90 °, α=45 ° most preferably, thus the linearly polarized light that makes the LCD outgoing is through forming elliptically polarized light or positive circularly polarized light behind the above-mentioned Trackpad.
Optical path difference when second transparent insulating layer | when Δ n|d equaled (2m+1) * (λ/4), wherein m was 〉=0 integer, and the equivalence of second transparent insulating layer is a quarter-wave plate; This moment second transparent insulating layer optical path difference | the value of Δ n|d be impinge perpendicularly on second transparent insulating layer linearly polarized light wavelength X (2m+1) * (1/4) doubly, wherein m is 〉=0 integer.
The selected interval of the preferred above-mentioned second transparent insulation layer thickness (being the thickness of liquid crystal layer) d is 2um～20um, can effectively adjust above-mentioned Trackpad and be in a preferable duty in this distance range; The refringence absolute value of preferred above-mentioned liquid crystal | and Δ n| (promptly | n
o-n
e|) selected interval be 0.04～0.3; The selected interval of the optical path difference of the second then preferable transparent insulating layer is 80nm～6000nm.
When the linearly polarized light that impinges perpendicularly on second transparent insulating layer is the light time of single wavelength, the optical path difference of second transparent insulating layer | the value of Δ n|d be impinge perpendicularly on second transparent insulating layer linearly polarized light wavelength X (2m+1) * (1/4) doubly, wherein m is 〉=0 integer, second transparent insulating layer is with respect to the light of this wavelength, equivalence is a quarter-wave plate, can make the linearly polarized light of incident become positive circularly polarized light when outgoing.
The light time that comprises multiple different wave length when the linearly polarized light that impinges perpendicularly on second transparent insulating layer, usually choose the intermediate value in all wavelengths, as the optical path difference of determining second transparent insulating layer | the basis of Δ n|d, the i.e. optical path difference of second transparent insulating layer | the value of Δ n|d be impinge perpendicularly on second transparent insulating layer linearly polarized light central wavelength lambda (2m+1) * (1/4) doubly, wherein m is 〉=0 integer.In this case, second transparent insulating layer equals the light of this central wavelength lambda with respect to wavelength, and equivalence is a quarter-wave plate, can make the linearly polarized light of incident become positive circularly polarized light when outgoing; Second transparent insulating layer is with respect to the light of other wavelength, and just Approximate Equivalent is a quarter-wave plate, but still can change these polarization state of light by Trackpad, makes the linearly polarized light of incident become elliptically polarized light when outgoing.For example, suppose capacitive touch control plate is made the quarter wave plate (550nm/4=137.5nm) of the centre wavelength 550nm that is equivalent to visible light wave range, then the optical path difference of second transparent insulating layer can be (2m+1) * 137.5nm.If m=0, then other wavelength visible light of off-center wavelength (550nm) is an elliptically polarized light behind process second transparent insulating layer of Trackpad, can produce chromatic dispersion, and the then optical dispersion far away more of off-center wavelength is big more, but is elliptically polarized light at least, does not have the blind area phenomenon.The abbe number of various wavelength light when setting m=0 except that centre wavelength (550nm) after through second transparent insulating layer is a, and the abbe number of the various wavelength light of m ≠ 0 o'clock except that centre wavelength (550nm) after through second transparent insulating layer is (2m+1) * a so; For centre wavelength light, still can not produce chromatic dispersion; But the abbe number of other wavelength light be original (2m+1) doubly, and the optical path difference of second transparent insulating layer designs greatly more, and is serious more for the optical dispersion of off-center wavelength.Common acceptable maximum abbe number is 21a, and promptly the span of m is m=0～10, and the selected interval of the optical path difference of the second promptly preferable transparent insulating layer is 137.5nm～2887.5nm.
When making capacitive touch control plate, can pre-determine optical path difference | the value of Δ n|d; Again by selecting the refringence absolute value of liquid crystal | Δ n| and the adjustment second transparent insulating layer thickness d, making the optical path difference of second transparent insulating layer | Δ n|d equals predetermined value, and by the above-mentioned first transparent, oriented layer and the second transparent, oriented layer orientation to liquid crystal in above-mentioned second transparent insulating layer, long axis of liquid crystal molecule is all arranged along same direction, thereby making the second transparent insulating layer equivalence is a wave plate structure, has the optical function that can change by the polarization state of light of Trackpad.
The above-mentioned first transparent, oriented layer and the second transparent, oriented layer adopt insulating material (as polyimide or magnesium oxide) to make usually, can reduce owing to containing the possibility that the conduction foreign matter causes first transparent conductive material layer and the second transparent conductive material layer short circuit in second transparent insulating layer, and the first transparent, oriented layer can be filled and led up the groove between the stitching on first transparent conductive material layer, the second transparent, oriented layer can be filled and led up the groove between the stitching on second transparent conductive material layer, eliminates the apparent electrode shadow phenomenon that groove thus brings.
In order to reduce the possibility of first transparent conductive material layer and the second transparent conductive material layer short circuit better, and eliminate apparent electrode shadow phenomenon, preferably between first transparent conductive material layer and the first transparent, oriented layer, be provided with one or more layers transparent insulation material thin layer, between second transparent conductive material layer and the second transparent, oriented layer, be provided with one or more layers transparent insulation material thin layer.Above-mentioned transparent insulation material thin layer can adopt silit to make.
In order to guarantee that further the second transparent insulation layer thickness is even, be distributed with insulated particle in the preferred liquid crystal, the insulated particle both sides contact with the second transparent, oriented layer with the first transparent, oriented layer respectively.Insulated particle plays separation, supporting role, makes the maintenance of each layer of Trackpad smooth, not yielding.Preferred insulated particle arranging density is even.
Preferred above-mentioned insulated particle is baton round or silicon ball, the equal and opposite in direction of all baton rounds or silicon ball.Because baton round or silicon ball are spherical particle, its each to consistent size, therefore be easy to realize anchorage force balance everywhere, make Trackpad keep smooth, not yielding.And, because baton round or silicon ball have certain elasticity, so in the manufacturing process, can make baton round or silicon ball produce small elastic deformation from both sides extruding plastic ball or silicon ball, thereby increase the anchorage force of second transparent insulating layer.
Above-mentioned first transparent insulating layer and the 3rd transparent insulating layer can adopt glass plate or transparent plastic sheet, and wherein first transparent insulating layer or the 3rd transparent insulating layer are as the protective seam of Trackpad.
Above-mentioned first transparent conductive material layer and second transparent conductive material layer are as two inductive layers of capacitive touch control plate, etch process by the liquid crystal cell making, can carry out very meticulous etching, produce the sensing elements of a fix X, the Y stitching that have high resolving power, can realize the capacitive touch control plate of multi-point touch and handwriting functions, and first stitching and second stitching point.Above-mentioned first transparent conductive material layer, second transparent conductive material layer can adopt transparent conductive materials such as tin indium oxide (ITO) or elargol to make.
Preferred above-mentioned first transparent conductive material layer is attached to first transparent insulating layer on the one side of second transparent insulating layer; Second transparent conductive material layer is attached to the 3rd transparent insulating layer on the one side of second transparent insulating layer.
The present invention adopts conductive component to be connected with the second stitching contact with the first stitching contact, and promptly the first stitching contact and the second stitching contact are directly drawn with conductive component.Conductive component can be flexible printed circuit board, metal terminal pin or conductive paper, can simplify technology like this, and reduce cost.
The above-mentioned first stitching contact can parallelly respectively be drawn on the step of first transparent insulating layer and on the step of the 3rd transparent insulating layer with the second stitching contact, reduce because the uneven electric capacity uneven phenomenon that is produced of wiring, can improve induction precision, need two conductive components this moment, and promptly the first stitching contact and the second stitching contact are directly drawn respectively with two conductive components.Perhaps the first stitching contact and the second stitching contact are all guided on the step of first transparent insulating layer or on the step of the 3rd transparent insulating layer by conductiving point, only need a conductive component this moment, and promptly the first stitching contact and the second stitching contact are directly drawn jointly with a conductive component.
On the other hand, the present invention also provides a kind of method for making of above-mentioned capacitive touch control plate, comprises the following steps: successively
(1) on the one side of second transparent insulating layer, plates transparent conductive material at first transparent insulating layer, form first transparent conductive material layer; On the one side of second transparent insulating layer, plate transparent conductive material at the 3rd transparent insulating layer, form second transparent conductive material layer;
(2) first transparent conductive material layer is carried out etching, obtain required X-axis stitching, the X-axis stitching has the first stitching contact; Second transparent conductive material layer is carried out etching, obtain required Y-axis stitching, the Y-axis stitching has the second stitching contact;
(3) comprising: (3.1) are being coated with the first transparent, oriented layer (when capacitive touch control plate also is provided with the transparent insulation material thin layer on first transparent conductive material layer, on first transparent conductive material layer, be coated with one or more layers transparent insulation material thin layer earlier, on the transparent insulation material thin layer, be coated with the first transparent, oriented layer then), and the first transparent, oriented layer is carried out directional process towards the one side of second transparent insulating layer, make it play orientation liquid crystal; (3.2) be coated with the second transparent, oriented layer on second transparent conductive material layer (when capacitive touch control plate also is provided with the transparent insulation material thin layer, on second transparent conductive material layer, be coated with one or more layers transparent insulation material thin layer earlier, on the transparent insulation material thin layer, be coated with the second transparent, oriented layer then), and the second transparent, oriented layer is carried out directional process towards the one side of second transparent insulating layer, make it play orientation liquid crystal;
(4) comprise successively: (4.1) print frame with jointing material on the first transparent, oriented layer; (4.2) in frame filling liquid crystal (when being distributed with insulated particle in the liquid crystal of second transparent insulating layer, on the first transparent, oriented layer with after the jointing material printing frame, earlier on the first transparent, oriented layer, spray insulated particle, insulated particle is in the frame, then the space filling liquid crystal between the insulated particle in frame); (4.3) then the first transparent, oriented layer and the second transparent, oriented laminating are lumped together, make first transparent conductive material layer and the second transparent conductive material layer contraposition (the X-axis stitching is vertical mutually with the Y-axis stitching) during applying, the first transparent, oriented layer, the second transparent, oriented layer and frame surround a box body, and liquid crystal constitutes second transparent insulating layer;
(5) jointing material that constitutes frame is solidified, thereby first transparent insulating layer, first transparent conductive material layer, the first transparent, oriented layer, second transparent insulating layer, the second transparent, oriented layer, second transparent conductive material layer and the 3rd transparent insulating layer are superimposed together successively, and wherein second transparent insulating layer can make the linearly polarized light of incident become positive circularly polarized light or elliptically polarized light when outgoing.When Trackpad also was provided with the transparent insulation material thin layer, first transparent insulating layer, first transparent conductive material layer, transparent insulation material thin layer, the first transparent, oriented layer, second transparent insulating layer, the second transparent, oriented layer, transparent insulation material thin layer, second transparent conductive material layer and the 3rd transparent insulating layer were superimposed together successively.
At completing steps (5) afterwards, with conductive component the first stitching contact and the second stitching contact are directly drawn, following two kinds of situations are specifically arranged: first kind of situation is, first transparent insulating layer and the 3rd transparent insulating layer respectively leave a step, the first stitching contact and the second stitching contact lay respectively on the first transparent insulating layer step and the 3rd transparent insulating layer step, and this moment, the first stitching contact and the second stitching contact were directly drawn respectively with two conductive components; Second kind of situation is, the first stitching contact and the second stitching contact are all guided to (promptly on the step of first transparent insulating layer or on the step of the 3rd transparent insulating layer) on the same step by conductiving point, and this moment, the first stitching contact and the second stitching contact were directly drawn jointly with a conductive component.
Above-mentioned jointing material can adopt the epoxide resin material that is mixed with glass fibre or silicon ball, adopts hot bonding method to make its curing; Perhaps adopt the ultraviolet cured adhesive that is mixed with glass fibre or silicon ball, adopt the method for UV-irradiation to make its curing.
In addition, also can adopt following method to make above-mentioned Trackpad: step (1)～step (3) is identical with last a kind of method; Difference is, in step (4), on the one side of second transparent insulating layer, print frame with jointing material at the first transparent, oriented layer, leave opening on the frame, then the first transparent, oriented layer and the second transparent, oriented laminating are lumped together (when being distributed with insulated particle in the liquid crystal of second transparent insulating layer, spray insulated particle earlier, fit again), adopt the mode that vacuumizes filling liquid to pour into liquid crystal then, seal opening with sealing compound at last.
The present invention can realize the two-dimensional localization function, and its second transparent insulating layer equivalence is a wave plate, can change the polarization state of light by Trackpad; Particularly when the optical path difference of second transparent insulating layer | Δ n|d=(2m+1) * (λ/4), when wherein m was 〉=0 integer, the second transparent insulating layer equivalence was a quarter-wave plate, can make the linearly polarized light of incident become positive circularly polarized light when outgoing.That is to say, the present invention can make the linearly polarized light that incides Trackpad become positive circularly polarized light or elliptically polarized light after by Trackpad, not only make user's eyes feel comfortable, be difficult for causing visual fatigue, and can overcome the blind area phenomenon that some certain applications exists, usable range is more extensive.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is the left view (mainly expressing first transparent conductive material layer and second transparent conductive material layer) of Fig. 1;
Fig. 3 is the structural representation of the embodiment of the invention 2.
Embodiment
Embodiment 1
As depicted in figs. 1 and 2, this capacitive touch control plate comprises first transparent insulating layer 1 in order, comprises first transparent conductive material layer 2, second transparent insulating layer 3, second transparent conductive material layer 4 that comprises Y-axis stitching 41 and the 3rd transparent insulating layer 5 of X-axis stitching 21, X-axis stitching 21 has the first stitching contact 211, and Y-axis stitching 41 has the second stitching contact 411; Be provided with between the first transparent, oriented layer, 6, the second transparent insulating layer 3 and second transparent conductive material layer 4 between second transparent insulating layer 3 and first transparent conductive material layer 2 and be provided with the second transparent, oriented layer 7; Second transparent insulating layer 3 is made of liquid crystal 31, be distributed with insulated particle (being that liquid crystal 31 is filled in the space between the insulated particle) in the liquid crystal 31, insulated particle is a baton round 32, baton round 32 both sides contact with the second transparent, oriented layer 7 with the first transparent, oriented layer 6 respectively, baton round 32 arranging densities are even, the equal and opposite in direction of all baton rounds 32 (in the manufacturing process, can make baton round 32 produce small elastic deformation) from both sides extruding plastic ball 32.
The first transparent, oriented layer 6 and the second transparent, oriented layer 7 adopt polyimide to make.Towards the one side of liquid crystal 31 after treatment, have the directed groove of rule on this face, thereby possess orientating function on the first transparent, oriented layer 6 and the second transparent, oriented layer 7.
This capacitive touch control plate is applicable to monochromatic liquid crystal display, the linearly polarized light of this monochromatic liquid crystal display outgoing is a sodium yellow, wavelength X=589nm, when then the equivalence of second transparent insulating layer 3 (liquid crystal layer) is quarter-wave plate, its light path difference basis | calculate Δ n|d=(2m+1) * (λ/4), can get one group of design load | Δ n|d=147.25nm, 441.75nm, 736.25nm, 1030.75nm If choose thickness (being the thickness of the liquid crystal layer) d=3um of second transparent insulating layer 3, and liquid crystal penetrate the rate variance absolute value | Δ n| chooses in 0.04～0.3 scope, then satisfactory light path difference has 147.25nm, 441.75nm and 736.25nm, corresponding | Δ n| value is respectively 0.04908,0.14725 and 0.24542.This capacitive touch control plate is chosen optical path difference | Δ n|d=736.25nm, wherein | Δ n| value is 0.24542, the d value is 3um, can be the corresponding capacitive touch control plate of LCD of sodium yellow with the linearly polarized light of outgoing then, and this capacitive touch control plate equivalence is a quarter-wave plate.In addition, be the monochromatic LCD of other wavelength at emergent light, can design corresponding capacitive touch control plate according to said method, making this capacitive touch control plate equivalence is a quarter-wave plate.
First transparent insulating layer 1 and the 3rd transparent insulating layer 5 adopt glass plate, and wherein first transparent insulating layer 1 is as the protective seam of Trackpad.
First transparent conductive material layer 2 and second transparent conductive material layer 4 are as two inductive layers of capacitive touch control plate, and first transparent conductive material layer 2, second transparent conductive material layer 4 adopt tin indium oxide (ITO) to make.
First transparent conductive material layer 2 is attached to first transparent insulating layer 1 on the one side of second transparent insulating layer 3; Second transparent conductive material layer 4 is attached to the 3rd transparent insulating layer 5 on the one side of second transparent insulating layer 3.
The first stitching contact 211 is drawn on the step 11 of first transparent insulating layer 1 and on the step 51 of the 3rd transparent insulating layer 5 with the second stitching contact 411 is parallel respectively, and the first stitching contact 211 and two flexible printed circuit boards 8 of the second stitching contact, 411 usefulness are directly drawn respectively.
The method for making of above-mentioned Trackpad comprises the following steps: successively
(1) on the one side of second transparent insulating layer 3, plates transparent conductive material at first transparent insulating layer 1, form first transparent conductive material layer 2; On the one side of second transparent insulating layer 3, plate transparent conductive material at the 3rd transparent insulating layer 5, form second transparent conductive material layer 4;
(2) first transparent conductive material layer 2 is carried out etching, obtain required X-axis stitching 21, X-axis stitching 21 has the first stitching contact 211; Second transparent conductive material layer 4 is carried out etching, obtain required Y-axis stitching 41, Y-axis stitching 41 has the second stitching contact 411;
(3) comprising: (3.1) are coated with the first transparent, oriented layer 6 on first transparent conductive material layer 2, and the first transparent, oriented layer 6 is carried out directional process towards the one side of second transparent insulating layer 3, make them can be to 31 orientations of liquid crystal; (3.2) the coating second transparent, oriented layer 7 on second transparent conductive material layer 4, and the second transparent, oriented layer 7 carried out directional process towards the one side of second transparent insulating layer 3 makes them can be to 31 orientations of liquid crystal;
(4) on the first transparent, oriented layer 6, print frame 9 with jointing material; Spray baton round 32 on the first transparent, oriented layer 6, baton round 32 is in the frame, then the space filling liquid crystal 31 between the baton round 32 in frame 9; Then the first transparent, oriented layer 6 and the second transparent, oriented layer 7 are fit together, make first transparent conductive material layer 2 and 4 contrapositions of second transparent conductive material layer (X-axis stitching 21 is vertical mutually with Y-axis stitching 41) during applying, the first transparent, oriented layer 6, the second transparent, oriented layer 7 and frame surround a box body; All liquid crystal 31 and baton round 32 are in the box body, form second transparent insulating layer 3; Above-mentioned jointing material adopts the epoxide resin material that is mixed with glass fibre or silicon ball;
(5) make the jointing material that constitutes frame 9 solidify (adopting hot bonding method to make its curing), thereby first transparent insulating layer 1, first transparent conductive material layer 2, the first transparent, oriented layer 6, second transparent insulating layer 3, the second transparent, oriented layer 7, second transparent conductive material layer 4 and the 3rd transparent insulating layer 5 are superimposed together successively.
At completing steps (5) afterwards, the first stitching contact 211 and two flexible printed circuit boards 8 of the second stitching contact, 411 usefulness are directly drawn respectively.
As shown in Figure 3, be provided with layer of transparent insulating material film layer 10 between first transparent conductive material layer 2 of this capacitive touch control plate and the first transparent, oriented layer 6, be provided with the transparent insulation material thin layer 20 of one deck between second transparent conductive material layer 4 and the second transparent, oriented layer 7, transparent insulation material thin layer 10 and transparent insulation material thin layer 20 adopt silit to make.
This capacitive touch control plate is applicable to colour liquid crystal display device, the wavelength coverage of this colour liquid crystal display device emergent light is 380nm～780nm, can choose central wavelength lambda=550nm as the optical path difference of determining second transparent insulating layer | the basis of Δ n|d, the i.e. optical path difference of second transparent insulating layer | its light path difference basis of the value of Δ n|d | calculate Δ n|d=(2m+1) * (λ/4), λ=550nm wherein can get one group of design load | Δ n|d=137.5nm, 412.5nm, 687.5nm, 962.5nm, 1237.5nm, 1512.5nm If choose thickness (being the thickness of the liquid crystal layer) d=15um of second transparent insulating layer 3, and liquid crystal penetrate the rate variance absolute value | Δ n| chooses in 0.04～0.3 scope, then satisfactory optical path difference design load has 687.5nm, 962.5nm, 1237.5nm, 1512.5nm ..., corresponding | Δ n| value is respectively 0.04583,0.06417,0.0825,0.10083 ...Because above-mentioned optical path difference design load only possesses the quarter-wave plate function to central wavelength lambda=550nm, and be elliptically polarized light behind other wavelength light process capacitive touch control plates, can produce certain chromatic dispersion, and decentering wavelength optical dispersion degree far away more is serious more, and, the optical path difference of capacitive touch control plate second transparent insulating layer is big more, and the chromatic dispersion degree of light that wavelength is not equal to centre wavelength 550nm is also serious more.Therefore, this capacitive touch control plate is chosen optical path difference | Δ n|d=687.5nm, wherein | Δ n| value is 0.04583, the d value is 15um, this capacitive touch control plate is that the light equivalence of 550nm is a quarter-wave plate with respect to wavelength, can make the linearly polarized light (wavelength equals 550nm) of incident become positive circularly polarized light when outgoing; With respect to the light (wavelength is not equal to 550nm) of other wavelength, Approximate Equivalent is a quarter-wave plate, can make the linearly polarized light of incident become elliptically polarized light when outgoing.
All the other structures of this capacitive touch control plate are identical with embodiment 1.
In the method for making of this capacitive touch control plate: step (3.1) is coated with layer of transparent insulating material film layer 10 on first transparent conductive material layer 2, on transparent insulation material thin layer 10, be coated with the first transparent, oriented layer 6 then, and the first transparent, oriented layer 6 is carried out directional process towards the one side of second transparent insulating layer 3, make them can be 31 orientations of liquid crystal; Step (3.2) is coated with layer of transparent insulating material film layer 20 on second transparent conductive material layer 4, on transparent insulation material thin layer 20, be coated with the second transparent, oriented layer 7 then, and the second transparent, oriented layer 7 is carried out directional process towards the one side of second transparent insulating layer 3, make them can be 31 orientations of liquid crystal; In the step (4), the jointing material of printing frame 9 adopts the ultraviolet cured adhesive that is mixed with glass fibre or silicon ball, adopts the method for UV-irradiation to make its curing in the step (5); All the other steps are identical with embodiment 1.After constituting the jointing material curing of frame 9, first transparent insulating layer 1, first transparent conductive material layer 2, transparent insulation material thin layer 10, the first transparent, oriented layer 6, second transparent insulating layer 3, the second transparent, oriented layer 7, transparent insulation material thin layer 20, second transparent conductive material layer 4 and the 3rd transparent insulating layer 5 are superimposed together successively.
In other embodiments, insulated particle also can be the silicon ball; First transparent insulating layer and the 3rd transparent insulating layer also can adopt transparent plastic sheet; First transparent conductive material layer and second transparent conductive material layer also can adopt other transparent conductive material (as elargol) to make; Can the first stitching contact and the second stitching contact all be guided on the step of first transparent insulating layer or on the step of the 3rd transparent insulating layer by conductiving point, only need a conductive component this moment, and promptly the first stitching contact and the second stitching contact are directly drawn jointly with a conductive component.
Claims (10)
1, a kind of capacitive touch control plate, comprise first transparent insulating layer in order, first transparent conductive material layer that comprises the X-axis stitching, second transparent insulating layer, second transparent conductive material layer and the 3rd transparent insulating layer that comprise the Y-axis stitching, the X-axis stitching has the first stitching contact, the Y-axis stitching has the second stitching contact, it is characterized in that: described second transparent insulating layer and comprise between first transparent conductive material layer of X-axis stitching and be provided with the first transparent, oriented layer, second transparent insulating layer and comprise between second transparent conductive material layer of Y-axis stitching and be provided with the second transparent, oriented layer, second transparent insulating layer is made of liquid crystal, and second transparent insulating layer can make the linearly polarized light of incident become positive circularly polarized light or elliptically polarized light when outgoing.
2, capacitive touch control plate according to claim 1, it is characterized in that: the optical path difference of described second transparent insulating layer equals (2m+1) * (λ/4), wherein λ is the linear polarization light wavelength that impinges perpendicularly on second transparent insulating layer, m is 〉=0 integer, and the equivalence of second transparent insulating layer is a quarter-wave plate.
3, capacitive touch control plate according to claim 1 is characterized in that: the selected interval of the described second transparent insulation layer thickness is 2um～20um, and the selected interval of the refringence absolute value of described liquid crystal is 0.04～0.3.
4, according to each described capacitive touch control plate of claim 1～3, it is characterized in that: be distributed with insulated particle in the described liquid crystal, the insulated particle both sides contact with the second transparent, oriented layer with the first transparent, oriented layer respectively, the common formation of insulated particle and liquid crystal second transparent insulating layer.
5, capacitive touch control plate according to claim 4 is characterized in that: described insulated particle arranging density is even.
6, capacitive touch control plate according to claim 4 is characterized in that: described insulated particle is baton round or silicon ball, the equal and opposite in direction of all baton rounds or silicon ball.
7, according to each described capacitive touch control plate of claim 1～3, it is characterized in that: be provided with one or more layers transparent insulation material thin layer between described first transparent conductive material layer and the first transparent, oriented layer, be provided with one or more layers transparent insulation material thin layer between second transparent conductive material layer and the second transparent, oriented layer.
8, a kind of method for making of capacitive touch control plate is characterized in that comprising the following steps: successively
(1) on the one side of second transparent insulating layer, plates transparent conductive material at first transparent insulating layer, form first transparent conductive material layer; On the one side of second transparent insulating layer, plate transparent conductive material at the 3rd transparent insulating layer, form second transparent conductive material layer;
(2) first transparent conductive material layer is carried out etching, obtain required X-axis stitching, the X-axis stitching has the first stitching contact; Second transparent conductive material layer is carried out etching, obtain required Y-axis stitching, the Y-axis stitching has the second stitching contact;
(3) comprising: (3.1) are coated with the first transparent, oriented layer on first transparent conductive material layer, and the first transparent, oriented layer is carried out directional process towards the one side of second transparent insulating layer, make it play orientation to liquid crystal; (3.2) on second transparent conductive material layer, be coated with the second transparent, oriented layer, and the second transparent, oriented layer is carried out directional process towards the one side of second transparent insulating layer, make it play orientation liquid crystal;
(4) comprise successively: (4.1) print frame with jointing material on the first transparent, oriented layer; (4.2) filling liquid crystal in frame; (4.3) then the first transparent, oriented layer and the second transparent, oriented laminating are lumped together, make first transparent conductive material layer and the second transparent conductive material layer contraposition during applying, the first transparent, oriented layer, the second transparent, oriented layer and frame surround a box body, and liquid crystal constitutes second transparent insulating layer;
(5) jointing material that constitutes frame is solidified, thereby first transparent insulating layer, first transparent conductive material layer, the first transparent, oriented layer, second transparent insulating layer, the second transparent, oriented layer, second transparent conductive material layer and the 3rd transparent insulating layer are superimposed together successively, and wherein second transparent insulating layer can make the linearly polarized light of incident become positive circularly polarized light or elliptically polarized light when outgoing.
9, the method for making of capacitive touch control plate according to claim 8, it is characterized in that: step (3.1) is before the coating first transparent, oriented layer, one or more layers transparent insulation material thin layer of coating on first transparent conductive material layer is coated with the first transparent, oriented layer then on the transparent insulation material thin layer earlier; Step (3.2) is before the coating second transparent, oriented layer, and one or more layers transparent insulation material thin layer of coating on second transparent conductive material layer is coated with the second transparent, oriented layer then on the transparent insulation material thin layer earlier.
10, the method for making of capacitive touch control plate according to claim 8 is characterized in that: spray insulated particle increasing step (4.1 ') between step (4.1) and (4.2) on the first transparent, oriented layer, insulated particle is in the frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100289459A CN100570444C (en) | 2008-06-18 | 2008-06-18 | Capacitive touch control plate and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100289459A CN100570444C (en) | 2008-06-18 | 2008-06-18 | Capacitive touch control plate and preparation method thereof |
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| CN101299102A CN101299102A (en) | 2008-11-05 |
| CN100570444C true CN100570444C (en) | 2009-12-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916154A (en) * | 2010-08-07 | 2010-12-15 | 汕头超声显示器（二厂）有限公司 | Projection-type capacitive touch screen |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2518602B1 (en) * | 2009-12-22 | 2014-06-25 | Nissha Printing Co., Ltd. | Touch panel and portable device using the same |
| JP5133449B1 (en) * | 2011-11-04 | 2013-01-30 | Ｓｍｋ株式会社 | Transparent touch panel |
| CN105204694B (en) * | 2014-06-12 | 2019-03-01 | 宸鸿科技(厦门)有限公司 | Nano-silver thread touch panel |
| CN105204695B (en) * | 2014-06-12 | 2018-08-21 | 宸鸿科技(厦门)有限公司 | Nano-silver thread conductive laminate structure and capacitance type touch-control panel |
| DE102015216629A1 (en) * | 2015-08-31 | 2017-03-02 | BSH Hausgeräte GmbH | Domestic appliance with an external or internal touchscreen control device |
| CN106067018B (en) | 2016-08-08 | 2019-01-04 | 京东方科技集团股份有限公司 | A kind of fingerprint recognition display panel and display device |
| CN111488065A (en) * | 2020-05-26 | 2020-08-04 | 深圳市宝立创科技有限公司 | Cholesteric liquid crystal handwriting board and preparation method thereof |
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2008
- 2008-06-18 CN CNB2008100289459A patent/CN100570444C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916154A (en) * | 2010-08-07 | 2010-12-15 | 汕头超声显示器（二厂）有限公司 | Projection-type capacitive touch screen |
| CN101916154B (en) * | 2010-08-07 | 2012-09-05 | 汕头超声显示器（二厂）有限公司 | Projection-type capacitive touch screen |
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| CN101299102A (en) | 2008-11-05 |
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