CN1258134C - Transparent coordinate input device and composite material for forming ridge part on transparent resistor membrane - Google Patents
Transparent coordinate input device and composite material for forming ridge part on transparent resistor membrane Download PDFInfo
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- CN1258134C CN1258134C CN 200310101060 CN200310101060A CN1258134C CN 1258134 C CN1258134 C CN 1258134C CN 200310101060 CN200310101060 CN 200310101060 CN 200310101060 A CN200310101060 A CN 200310101060A CN 1258134 C CN1258134 C CN 1258134C
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Abstract
Provided is a transparent coordinate input device and a transparent composite material capable of suppressing the deterioration of visual confirmability by the reflection of display light while suppressing interference fringes in an input operation. A number of ridges 45 extending in one direction are formed on the surface of a first transparent resistance film 31. The ridges 45 are, for example, protruding parts having triangular sectional shapes, and one set of an inclined surface 46a and an inclined surface 46b is alternately formed on the surface of the first transparent resistance film 31. A number of such narrow and slender inclined surfaces 46a and 46b generate extremely minute interference fringes which cannot be visually confirmed by human eyes on the surface of the resistance film 31 or the inclined surfaces 46a and 46b. The interference fringes become minute so as not to be visually confirmable by setting the pitch P of the ridges 45 sufficiently minute, and the presence of the interference fringes is apparently hardly recognized.
Description
Technical field
The present invention relates to directly to import the picture top coordinate transparent coordinate input device and constitute the transparent composite of this transparent coordinate input device.
Background technology
With PDA is the portable information terminal of representative, generally all has to be used for or the display frame of finger manipulation display panels etc., carries out the coordinate entering device of the input of the selection of menu or data.Such coordinate entering device possesses the transparent coordinate input device of demonstration to import that forms, is used to refer to display panels in the top of display panels usually.Even if the transparent coordinate input device of the resistance membrane type of in transparent coordinate input device, also using extensively especially, such as everyone knows, possess to have formed from the teeth outwards and be called ITO (Indium Tin Oxide: the glass plate of transparent resistance film tin indium oxide) and formed the transparent resin film of softness of the PET (polyethylene terephthalate film) etc. of same transparent resistance film in operation one side from the teeth outwards in display panels one side.In addition, coordinate entering device is exactly that these 2 transparent resistance films are prepared the flat panel device that is made in opposite directions with insulating cell every a compartment of terrain.
Such transparent coordinate input device, as everybody knows when carrying out input operation with the surface of pen or finger press transparent coordinate input device, the transparent resin film of operating a side is more dented a little, is the interference fringe that the center produces iris and ring-type with the pushing part.When having produced such interference fringe, then when carrying out the operation of transparent coordinate input device, the watching property of display panels will descend, and just is difficult to carry out smooth and easy comfortable input operation.Particularly because the generation of the big more interference fringe of size of transparent coordinate input device is just remarkable more, so make people require the interference fringe countermeasure consumingly owing to the maximization of the size of the display frame of nearest portable information terminal.
In view of present situation as described above, as the existing interference fringe countermeasure of transparent coordinate input device, people know in display panels one side or operate the transparent coordinate input device that forms a plurality of fine projections on the surface of transparent resistance film of a side.Such transparent coordinate input device and since the light of irradiating liquid crystal display panel owing to the fine projection that on the surface of transparent resistance film, forms to multi-direction diffusion, so can suppress the generation of interference fringe.(for example, referring to patent documentation 1).
[patent documentation 1]
Te Kaiping 8-281856 communique
Summary of the invention
(problem that invention will solve)
But, as described above in display panels one side or operate the transparent coordinate input device that has formed a plurality of projections on the surface of transparent resistance film of a side, because each projection plays a part fine lens respectively, when seeing display panels, the outside of transparent coordinate input device showing the inhomogenous problem that becomes so exist.In addition, also exist owing to the lens effect of each projection and thicken unclear and problem that can not observe display panels brightly.The heterogeneity of such a existing transparent coordinate input device or smudgy, just become for the root of the watching property reduction that makes display panels by.
The present invention invents in view of above-mentioned thing, when purpose is to be provided at interference fringe in the time of can suppressing input operation or ambiguous generation, can also suppress transparent coordinate input device and transparent composite because of the reduction that shows the watching property that reflection of light produces.
(concrete settling mode)
To achieve these goals, if employing the present invention, then can provide following transparent coordinate input device: possess the 1st transparent base that has formed the 1st transparent resistance film, formed every toward each other with compartment of terrain and above-mentioned the 1st transparent base, the 2nd transparent base in the face of the 2nd transparent resistance film of above-mentioned the 1st transparent resistance film is characterized in that: formed a plurality of ridge portion with the step pitch of regulation at least one side in the above-mentioned the 1st and the 2nd transparent resistance film.
If adopt such transparent coordinate input device because this ridge portion is the shape of extending longly in one direction, so brightly view image and can not produce by lens bring smudgy.In addition, can also prevent heterogeneity effectively.
Above-mentioned ridge portion can form a plurality of by the prominent bar with a plurality of cross section polygon shapes that constitute of the angle tilt that differs from one another with the step pitch of regulation.The prominent bar that extends longly like this can prevent the even generation of smudgy or uneven illumination that is produced by lens effect effectively.
The formation step pitch of above-mentioned ridge portion it is desirable to be set at 100～5000 microns scope.In addition, the height of above-mentioned ridge portion it is desirable to be set at 0.1～10 micron scope.Owing to is the height setting of the ridge portion of the formation step pitch of ridge portion such scope, so when pushing the 1st, the 2nd transparent base surperficial, a plurality of ridge portion just can produce the extremely thin interference fringe that human eye is difficult to recognize.Employing make the step pitch of ridge portion form thin fully way, the interference fringe that takes place in transparent coordinate input device will become to fine to unidentified the sort of degree, does not almost see the existence of interference fringe in appearance.
Liquid crystal indicator as if the said transparent coordinate input device in top being applied to possess display panels then can improve the watching property of liquid crystal indicator and carry out input operation with the demonstration of distinctness.
Above-mentioned ridge portion also can form the prominent bar of cross section polygon shape intermittently on its extending direction.In addition, above-mentioned ridge portion also can extend on the direction that tilts with constant angles in 2 the vertical limits that the pixel of above-mentioned display panels are divided into the district each.By means of this, just can prevent the generation of the interference fringe of liquid crystal indicator.
Description of drawings
The sectional view of Fig. 1 has illustrated the liquid crystal indicator as an embodiment of transparent coordinate input device of the present invention.
The expansion stereographic map of Fig. 2 has illustrated the reflection horizon of liquid crystal indicator.
The key diagram of Fig. 3 show specific transparent coordinate input device input coordinate mechanism.
The sectional view of Fig. 4 has illustrated transparent composite of the present invention.
The sectional view of Fig. 5 has illustrated the effect of transparent coordinate input device of the present invention.
The sectional view of Fig. 6 has illustrated another embodiment of transparent coordinate input device of the present invention.
The sectional view of Fig. 7 has illustrated another embodiment of transparent coordinate input device of the present invention.
The expansion stereographic map of Fig. 8 has illustrated another embodiment of transparent composite of the present invention.
The expansion stereographic map of Fig. 9 has illustrated another embodiment of transparent composite of the present invention.
The expansion stereographic map of Figure 10 has illustrated another embodiment of transparent composite of the present invention.
The expansion stereographic map of Figure 11 has illustrated another embodiment of transparent composite of the present invention.
The expansion stereographic map of Figure 12 has illustrated another embodiment of transparent composite of the present invention.
The expansion stereographic map of Figure 13 has illustrated another embodiment of transparent composite of the present invention.
The expansion stereographic map of Figure 14 has illustrated another embodiment of transparent composite of the present invention.
The sectional view of Figure 15 has illustrated the liquid crystal indicator as another embodiment of transparent coordinate input device of the present invention.
Symbol description:
The 10-liquid crystal indicator; The 12-display panels; The 13-transparent coordinate input device; 30a, 30b-transparent composite; 31-the 1st transparent resistance film; 32-the 1st transparent base; 33-the 2nd transparent resistance film; 34-the 2nd transparent base; The 35-insulating cell; 45-ridge portion.
Embodiment
Below, the embodiments of the present invention illustration is possessed the liquid crystal indicator of transparent coordinate input device (transparent coordinate input switch).Fig. 1 is the sectional view that is provided with the liquid crystal indicator of transparent coordinate input device of the present invention.Liquid crystal indicator 10 possesses front light-source (lighting device) 11 and display panels 12 and transparent coordinate input device 13.Front light-source 11 is made of light guide plate 15 and light source 16, is formed with plane of incidence 15a and sightingpiston 15b and exit facet 15c on light guide plate 15.
On the sightingpiston 15b of light guide plate 15, be formed with a plurality of making and import the light of coming in along with before exit facet 15c and then the ditch 17 of the triangular wave shape that changes from light source 16.The ditch 17 that forms on sightingpiston 15b is made of a pair of chamfered portion, and a side chamfered portion is made to and is that gentle slope 17a, the opposing party then become reflecting surface (steep chamfered portion) 17b for using the angle of inclination steeper than gentle slope 17a to form.In addition, the shape of this sightingpiston 15b is not limited to above-mentioned shape, so long as can be importing the shape that guides past exit facet 15c at the light of light guide plate 15 internal communications equably from plane of incidence 15a, what shape can.In addition, be formed with the AR clathrum 18 that brings anti-reflection effect at the exit facet 15c of light guide plate 15.
Constituting of display panels 12 seized liquid crystal layer 23 on both sides by the arms between the upper substrate 21 and infrabasal plate 22 of configuration opposite to each other, uses the encapsulant 24 that is provided with along the inner periphery part margo frontalis shape ground of substrate 21,22 that this liquid crystal layer is sealed.On the medial surface (infrabasal plate 22 1 sides) of upper substrate 21, be formed with liquid crystal key-course 26, on inner face one side (upper substrate 21 1 sides) of infrabasal plate 22, then be formed with the reflection horizon 25 of metal film, form liquid crystal key-course 27 in these 25 tops, reflection horizon with the illumination light that is used for reflecting front light-source 11 or outer light.The constituting of liquid crystal key- course 26,27 contained and is used for the electrode of drive controlling liquid crystal layer 23 or alignment films etc., also contains to be used for semiconductor element that above-mentioned electrode is switched etc.In addition, under situation about having, can also possess color filter.
Shape as above-mentioned recess 25c, can use the curved surface of the slyness of sphere etc., or the shape that this curved surface and plane are combined, adopt pitch angle or the step pitch of recess and the way of the degree of depth of adjusting inner face, just can make becomes the reflection horizon that has satisfied reflection characteristic with the design of electronic devices that possesses display panels 12 as the display part with matching.Have benefited from possessing reflection horizon 25, just can efficient reflect incident light well, just can carry out the higher demonstration of briliancy with surface configuration shown in Figure 2.In addition, outside incident light is, under the situation of light, just can prevent the normal reflection of light, can obtain bright and the good demonstration of watching property.In addition, display panels 12 remove reflective beyond, also can be semi-permeable or through mode, not limited by what.
Referring to Fig. 1, transparent coordinate input device 13 is by 2 transparent composite 30a, 30b and insulating cell 35 formations that make transparent composite 30a, 30b keep constant interval ground to separate.Transparent composite 30a, constitute by the 1st tabular transparent base 32 and the 1st transparent resistance film 31 that 1 face of the 1st transparent base 32 is covered, transparent composite 30b is by the 2nd tabular transparent base 34 and make that facing the 1st transparent resistance film 31 constitutes the 2nd transparent resistance film 33 that 1 face of the 2nd transparent base 34 is covered like that.The 1st transparent base 32, can be 0.5～1.5mm for example by thickness, for example the transparent PC about 1.0mm (poly-charcoal ester) resin forms, the 1st transparent resistance film 31 that the upper surface of the 1st transparent base 32 is covered, can use 0.01～0.05 micron of thickness, for example the transparent conductive material of the ITO about 0.02 micron (tin indium oxide) etc. forms.
The 2nd transparent base 34 can form with the transparent PET resin of about 170 microns of thickness for example, the 2nd transparent resistance film 33 that the lower surface of the 2nd transparent base 34 is covered, and the formation of the transparent conductive material of the ITO that available for example thickness is about 0.02 micron etc.Between the 1st transparent base 32 and the 2nd transparent base 34 at the insulating cell 35 that forms about 100 microns of thickness on the periphery.With constant interval the 1st transparent resistance film 31 and the 2nd transparent resistance film 33 are separated.
The operating principle of such transparent coordinate input device 13 is as follows.As shown in Figure 3A, electrode 41a, 41b form 1 group on the 1st transparent resistance film 31 on the both ends of Y direction in Fig. 3 form 1 group of electrode 42a, 42b on the both ends of the directions X that intersects vertically for 90 degree of the Y direction among Fig. 3 on the 2nd transparent resistance film 33.The 1st transparent resistance film 31 and the 2nd transparent resistance film 33 have the resistance value of homogeneous respectively in face.
Now, imagination with the indicating member pushing of pen etc. for example 34 selections of the 2nd transparent base be equivalent to the situation of the point of the S among Fig. 3, then the 1st transparent resistance film 31 and the 2nd transparent resistance film 33 become the state for conducting at a S place by means of the bending of the 2nd transparent base 34.At first, the detection of the coordinate of directions X, by means of the voltage between the electrode 42a, the 42b that are applied to the 2nd transparent resistance film 33, use on the 2nd transparent resistance film 33 with a S-electrode 42a between and corresponding resistance value RX1, the RX2 of distance between some S-electrode 42b on directions X, form electric potential gradient.Employing is from the way that the some S of the 1st transparent resistance film 31 takes out the current potential of this S, just can detect the coordinate of directions X at the some S place of transparent coordinate input device 13.
In addition, the detection of the coordinate of Y direction, by means of the voltage between the electrode 41a, the 41b that are applied to the 1st transparent resistance film 31, use on the 1st transparent resistance film 31 with a S-electrode 41a between and corresponding resistance value RY1, the RY2 of distance between some S-electrode 41b on the Y direction, form electric potential gradient.Employing is from the way that the some S of the 2nd transparent resistance film 33 takes out the current potential of this S, just can detect the coordinate of Y direction at the some S place of transparent coordinate input device 13.
So, just can obtain the directions X of pushing point S of transparent coordinate input device 13 and 2 dimension coordinate information of Y direction.The transparent coordinate input device 13 of this so-called analog resistance film method is characterized in that: if improve the precision of A/D converter then will improve the coordinate accuracy of detection.In addition, the coordinate detection method of transparent coordinate input device, remove beyond the analog resistance film method, also can be a plurality of for example on the 1st and the 2nd transparent resistance film respectively in X, the upwardly extending fine electrode spread in Y side, from the conduction detection coordinate, the so-called Digital Detecting mode of the contact point of this electrode.
The expansion stereographic map of Fig. 4 has illustrated transparent composite 30a.On the surface of the 1st transparent resistance film 31, be formed on 1 upwardly extending a plurality of ridge portion in side (lines) 45.Such ridge portion 45 is section constitution polygons, for example leg-of-mutton prominent bar, and it constitutes inclined-plane 46a and the inclined-plane 46b that forms 1 group on the surface of the 1st transparent resistance film 31 alternately.
The height H of ridge portion 45 can form 0.1～10 micron, 3 microns section triangle for example, and the step pitch of ridge portion 45 for example can be with 100～5000 microns, and for example 1000 microns step pitch forms.As long as the length of on the surface that forms a plurality of ridge portion 45, the 1 transparent resistance films 31 on the 1st transparent resistance film 31 just can be by the constant direction in face, extending and thin a plurality of inclined- plane 46a, 46b is covered.In addition, the step pitch of ridge portion 45 also can be set randomly, and the step pitch P of ridge portion 45 is changed.
A plurality of inclined- plane 46a, 46b that such width is thin and long, as shown in Figure 5 with indicating member 49 pushing the 2nd transparent base 34 of pen etc. surperficial the time, surface at the 1st transparent resistance film 31, in other words, tiltedly on face 46a, 46b, will produce the extremely thin interference fringe that is difficult to recognize with human eye.Owing to forming the step pitch P of ridge portion 45 carefully fully, the interference fringe that takes place in transparent coordinate input device 13 will taper to unidentified the sort of degree, from just almost can't see the existence of interference fringe in appearance.Such interference fringe.Though in 0.25 micron (half-wavelength of light), take place 1, if but use transparent coordinate input device 13 of the present invention, then ought for example do the step pitch P of ridge portion 45 to become 1mm,, then will produce 10 interference fringes in the width about 500 microns if difference of height is 2 microns.Even if produce 10 interference fringe in the width about 500 microns, also be extremely difficult with eye-observation, in fact just can not tell interference fringe again.On the other hand, when the step pitch P of ridge portion 45 was done to become below 100 microns, it was difficult precision to form ridge portion 45 well.Therefore, if the step pitch P of ridge portion 45 is set at 100～500 microns, then just can positively can not make the people recognize the existence of interference fringe.In addition, if set the step pitch P of ridge portion 45 randomly, then human eye just extremely is difficult to observe, and size also will become and be various interference fringes, so can further positively get rid of the influence of interference fringe.
On the other hand, transparent coordinate input device 13 of the present invention since inclined-plane 46a, the 46b of thin width be on 1 direction, extend long face, so can not be formed on 1 fine lens of locating imaging.Fine a plurality of projections that prior art is such all can form fine lens because of its each and produce a plurality of bright spots, on the illumination of illumination light, produce inhomogeneous, become inhomogenous by.But,, then can not produce so fine lens if use at the transparent coordinate input device of the present invention 13 that has formed a plurality of ridge portions 45 of on individual direction, extending longly on the surface of the 1st transparent resistance film 31.In addition, fine a plurality of projections that prior art is such, though all form owing to its each fine lens become for ambiguous by, but if use the transparent coordinate input device of the present invention 13 that has formed the ridge portion 45 of on 1 direction, extending longly, then because of preventing the so smudgy image that can observe distinctness.
As mentioned above, if the target that shows at display panels 12 with indicating member 49 indication in transparent coordinate input device 13 of the present invention, then the 1st transparent resistance film 31 and the 2nd transparent resistance film 33 will be located to contact and carry out conducting at 1.At this moment, though the 1st transparent base 34 can below produce deflection, interference fringe, but have benefited from being formed in inclined-plane 46a, the 46b of the ridge portion 45 of extending longly on 1 direction, just can make the interference fringe that is taken place carefully can not recognize that to human eye the sort of degree ground is thin.Therefore, the target that shows on display panels 12 just can be observed brightly and can not hinder observation because of interference fringe by transparent coordinate input device 13.In addition, constitute inclined-plane 46a, the 46b of ridge portion 45, owing to be the face that on 1 direction, extends longly, so can suppress the generation of the bright spot that forms by fine lens effect or smudgy, can be there not being the image quality of heterogeneity or ambiguous distinctness, observe display panels and can on the illumination of illumination light, not take place inhomogeneous.
When forming ridge portion 45, as long as the alike mold ejector moulding of the profile of use and ridge portion 45 in advance constitutes the transparent resin of the 1st transparent base 32, possessing on the 1st transparent base 32 of the ridge portion film forming from the teeth outwards by the 1st transparent resistance film 31 that ITO constitutes, just can obtain on the surface of the 1st transparent resistance film 31, having the transparent composite 30a of a plurality of ridge portion 45.In addition, also can be formed flatly the surface of the 1st transparent base, top at this 1st smooth transparent base forms the 1st transparent resistance film thicklyer, cuts the 1st transparent resistance film with the gimmick of etching etc. and is formed on 1 upwardly extending a plurality of fine ridge portion in side.
Also can form interference fringe in transparent composite one side as operation one side of transparent coordinate input device becomes and is unidentified ridge portion.As shown in Figure 6, transparent coordinate input device 51 possesses 2 transparent composite 52a, 52b.Transparent composite 52a is made of the 1st transparent base 53 and the 1st transparent resistance film 54, and transparent composite 52b is made of the 2nd transparent base 55 and the 2nd transparent resistance film 56.Wherein, on the surface of the 2nd transparent resistance film 56 of the transparent composite 52b that available indicating member 49 grades directly push, be formed on 1 upwardly extending a plurality of fine ridge portion 57 in side.Such ridge portion 57 is so long as got final product by the prominent bar of the thin and long a plurality of inclined-plane 57a of width, section triangle shape that 57b constitutes.
Ridge portion 57 with indicating member 49 pushing the 2nd transparent base 55 surperficial the time, on the surface of the 2nd transparent resistance film 56, in other words, will produce the extremely thin interference fringe that is difficult to recognize with human eye on inclined-plane 57a, 57b.Owing to forming the step pitch of ridge portion 57 carefully fully, it is thin to unidentified the sort of degree that the interference fringe that takes place in transparent coordinate input device 51 will become, from just almost can't see the existence of interference fringe in appearance.In addition, since constitute inclined-plane 57a, the 57b of ridge portion 57 and be on 1 direction, extend long face, so can suppress the generation of the bright spot that forms by fine lens effect or smudgy, can prevent heterogeneity or smudgy effectively, and can on the illumination of illumination light, not take place inhomogeneous.
Also can on the both sides of 1 group of transparent composite, form and interference fringe be become be unidentified ridge portion.As shown in Figure 7, transparent coordinate input device 61 possesses 2 transparent composite 62a, 62b.Transparent composite 62a is made of the 1st transparent base 63 and the 1st transparent resistance film 64, and transparent composite 62b is made of the 2nd transparent base 65 and the 2nd transparent resistance film 66.On the surface of the 2nd transparent resistance film 66 of the 1st transparent resistance film 64 that faces with each other that forms on transparent composite 62a, the 62b, be formed on 1 upwardly extending a plurality of fine ridge portion 67,68 in side.Such ridge portion 67,68 so long as the prominent bar of the section triangle shape that constitutes by thin and long a plurality of inclined-plane 67a, the 67b of width and inclined-plane 68a, 68b get final product.
Ridge portion 67,68, with indicating member 49 pushing the 2nd transparent base 65 surperficial the time, on the surface of the 1st transparent resistance film 64 and the 2nd transparent resistance film 66, in other words, on inclined-plane 67a, 67b and inclined-plane 68a, 68b, will produce the extremely thin interference fringe that is difficult to recognize with human eye.Owing to forming the step pitch of ridge portion 67,68 carefully fully, it is thin to unidentified the sort of degree that the interference fringe that takes place in transparent coordinate input device 61 will become, from just almost can't see the existence of interference fringe in appearance.In addition, since constitute inclined-plane 67a, the 67b of ridge portion 67,68 and inclined-plane 68a, 68b and be on 1 direction, extend long face, so can suppress the generation of the bright spot that forms by fine lens effect or smudgy, can prevent heterogeneity or smudgy effectively, and can on the illumination of illumination light, not take place inhomogeneous.
Interference fringe being become be unidentified ridge portion, also can be the shape that the limit curved edges is extended.As shown in Figure 8, transparent composite 71 is made of transparent base 72 and transparent resistance film 73.On the surface of transparent resistance film 73, form a plurality of fine ridge portions 74 of extending agley with the section triangle shape.Such ridge portion 74 produces the extremely thin interference fringe that is difficult to recognize with human eye.Owing to forming the step pitch of ridge portion 74 carefully fully, it is thin to unidentified the sort of degree that interference fringe will become, from just almost can't see the existence of interference fringe in appearance.In addition, because ridge portion 74 is by extending longly on 1 direction and crooked face constitutes, because of the generation of the bright spot that can suppress to form by fine lens effect can on the illumination of illumination light, not take place inhomogeneous, so can prevent heterogeneity or smudgy effectively.
Interference fringe is become is unidentified ridge portion, also can be on 1 direction, extend the long narrow flexure plane of width.As shown in Figure 9, transparent composite 81 is made of transparent base 82 and transparent resistance film 83.On the surface of transparent resistance film 83, forming a plurality of is the fine ridge portion 84 that the flexure plane of half-oval shaped constitutes by the cross section.Owing to forming the step pitch of such ridge portion 84 carefully fully, the existence of interference fringe will become to almost not recognizing.In addition, under the situation of present embodiment, particularly owing to when making 84 bendings of ridge portion, on 1 direction, extending, so in the generation that is applied to just can prevent effectively under the situation of liquid crystal indicator interference fringe.
Interference fringe is become is unidentified ridge portion, also can be on 1 direction, extend the long narrow flexure plane of width.As shown in figure 10, transparent composite 91 is made of transparent base 92 and transparent resistance film 93.On the surface of transparent resistance film 93, forming a plurality of is triangular shaped and the upward crooked fine ridge portion 94 in top by the cross section.Owing to forming the step pitch of such ridge portion 94 carefully fully, interference fringe will taper to unidentified the sort of degree, and the existence of interference fringe just almost can not be recognized in appearance.In addition, because ridge portion 94 extends longly on 1 direction, so bright spot that reason fine lens effect is produced or ambiguous being suppressed and can not produce inhomogeneously on the illumination of illumination light can prevent heterogeneity or ambiguous generation effectively.
Interference fringe is become be unidentified ridge portion, also can on extending direction, form the prominent bar of cross section rectangular shape intermittently.As shown in figure 11, on the surface of transparent composite 101, form the fine ridge portion 102 of a plurality of cross sections rectangular shape.Every person's constant length and formation intermittently form fine gap 103 on the extending direction of the ridge portion 102 shown in the arrow L in the drawings of this ridge portion 102 between each ridge portion 102.In addition, on the direction vertical with arrow L adjacent ridge portion 102 to each other, the amount of the half width of the length of the extending direction of each ridge portion 102 of all staggering ground forms.Such ridge portion 102 it is desirable to its extending direction L, for the extending direction E inclination constant angle θ at the edge of the pixel that constitutes display panels.
The interference fringe that takes place in such ridge portion 102 is fine to unidentified degree, almost distinguishes the existence that misknows interference fringe in appearance.Owing to the extending direction E inclination constant angle of the extending direction L that makes ridge portion 102 to the edge of the pixel of formation display panels, can be so that can not carry out the identification of interference fringe more.In addition, as shown in figure 12, every person's constant length ground forms ridge portion 105 intermittently on the extending direction of also can be in the drawings representing with arrow L, simultaneously, do to become and make at ridge portion 105 adjacent on the direction vertical chien shih gap 106 uniform transparent composites 107 that form like that each other with arrow L.
Also can be as shown in figure 13 on the surface of transparent composite 111, every person's constant length ground forms the fine ridge portion 112 of section triangle shape intermittently on the extending direction of representing with arrow L in the drawings, and on the direction vertical with arrow L for example every group of 4 ground form adjacent ridge portion 112 with putting together.In addition, also can on the surface of transparent composite 121, the fine ridge portion 122 of section triangle shape be extended on the extending direction shown in the arrow L among the figure as shown in figure 14, form fine muscle 123 intermittently.
In addition, transparent composite, both can do to become to adopt and form ridge portion on the transparent base that constitutes transparent composite, make the way of transparent resistance film film forming on this transparent base, make and on the surface of transparent composite, possess ridge portion, also can adopt the way that forms ridge portion at the transparent resistance film certainly on one's body, make on the surface of transparent composite, to possess ridge portion.Ridge portion also can use randomly, and step pitch forms.
In the above embodiment, though explanation is the liquid crystal indicator that possesses front light-source, transparent coordinate input device of the present invention as shown in figure 15, also can be used in possessing the liquid crystal indicator of backlight.
Backlight 130 possesses light source 131, penetrates from exit facet 132b the light from light source is imported to inside from side end face 132a, and the light guide plate 132 of the above-mentioned light of propagating in inside and be configured in the lens thin plate 133 of exit facet one side of light guide plate.
Can adopt through mode or reflective display panels as display panels, so that make towards the observer through light from backlight.In addition, on the face of the face of observation one side of display panels and/or backlight one side, can also form polarization plates 134135.
Transparent coordinate input device of the present invention and display panels can be pasted with the two sides and be with 136 to stick together.
(effect of invention)
Just as above detailed description the in detail, if adopt transparent coordinate input device of the present invention And transparent composite, owing to being done to become in 1 direction, ridge section extends the shape to get length, so Can suppress the bright spot that the fine lens effect of reason forms generation and can be in the illumination of illumination light Upper generation is inhomogeneous, can effectively prevent heterogeneity or smudgy. In addition, owing to make ridge section Step pitch form fully carefully, the interference fringe that takes place in transparent coordinate input device will become Become fine to unidentified the sort of degree, so almost do not see in appearance depositing of interference fringe .
Claims (8)
1. transparent coordinate input device is characterized in that:
Possess the 1st transparent base that has formed the 1st transparent resistance film, with described the 1st transparent base every the 2nd transparent base that has formed toward each other and with the compartment of terrain in the face of the 2nd transparent resistance film of described the 1st transparent resistance film;
Step pitch with regulation at least one side in the described the 1st and the 2nd transparent resistance film has formed a plurality of ridge portion.
2. transparent coordinate input device according to claim 1 is characterized in that:
The described step pitch that constitutes with regulation forms a plurality of by the prominent bar with a plurality of cross section polygon shapes that constitute of the angle tilt that differs from one another.
3. transparent coordinate input device according to claim 1 is characterized in that:
The formation step pitch of described ridge portion is set at 100～5000 microns scope.
4. transparent coordinate input device according to claim 1 is characterized in that:
The height of described ridge portion is set at 0.1～10 micron scope.
5. transparent coordinate input device according to claim 1 is characterized in that:
Described ridge portion forms the prominent bar of cross section polygon shape intermittently on its extending direction.
6. liquid crystal indicator is characterized in that:
Possess described transparent coordinate input device of claim 1 and display panels.
7. liquid crystal indicator according to claim 6 is characterized in that:
Described ridge portion extends on the direction that tilts with constant angle for each limit on the 2 vertical limits that the pixel of described display panels are divided into the district.
8. transparent composite is characterized in that:
Constitute by transparent base, a plurality of ridge portion that on transparent resistance film that forms on the surface of this transparent base and surface, forms with the regulation step pitch at this transparent composite.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002301741 | 2002-10-16 | ||
| JP2002301741 | 2002-10-16 | ||
| JP2003162057 | 2003-06-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1497418A CN1497418A (en) | 2004-05-19 |
| CN1258134C true CN1258134C (en) | 2006-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200310101060 Expired - Fee Related CN1258134C (en) | 2002-10-16 | 2003-10-13 | Transparent coordinate input device and composite material for forming ridge part on transparent resistor membrane |
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| CN (1) | CN1258134C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5552480B2 (en) * | 2009-03-27 | 2014-07-16 | 株式会社きもと | Newton ring prevention sheet and touch panel using the same |
| CN102782618A (en) * | 2010-03-29 | 2012-11-14 | 木本股份有限公司 | Sheet for preventing newton's rings, production method therefor, and touch panel |
-
2003
- 2003-10-13 CN CN 200310101060 patent/CN1258134C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1497418A (en) | 2004-05-19 |
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