CN2671015Y - Resistive touch panel touch components - Google Patents

Abstract

The utility model relates to a resistance-type touch-control board touch-control subassembly contains a first conductor unit, a second conductor unit, and the several spacer that is located between this first conductor unit and this second conductor unit, first conductor unit has a first base plate and one forms in the first transparent electrode layer on this first base plate surface, second conductor unit has a second base plate and one forms in the second transparent electrode layer on this second base plate surface, this second transparent electrode layer is towards this first transparent electrode layer, its characteristics are: the spacers are distributed on one surface of the first transparent electrode layer and the second transparent electrode layer, and the three nearest spacers form an acute triangle, so that the force required by sensing in touch control is reduced by the arrangement mode.

Description

Resistive touch panel touch components

technical field

The utility model relates to a touch component of a resistive touch panel, in particular to a touch component of a resistive touch panel used for isolating and reducing the force required for touch sensing.

Background technique

Touch panel (Touch pad) can be divided into resistive type and capacitive type according to the physical principle of detecting touch points. As shown in FIG. 1 , the resistive touch panel 9 basically consists of two upper and lower opposite films 91 , a glass substrate 92 and transparent electrodes formed on the opposite surfaces of the film 91 and the glass substrate 92 . 911, 921 and several dot spacers (Dotspacers) 93 arranged between the upper and lower transparent electrodes 911, 921. The upper and lower transparent electrodes 911, 921 are indium tin oxide (IndiumTin Oxide) with conductive properties, which is generally called ITO. The spacers 93 are insulating adhesive materials used to avoid contact between the film 91 and the glass substrate 92 when the two are bonded together, and each spacer 93 is spaced from each other with an appropriate distance, therefore, when the user uses a stylus (stylus) 8. After the upper transparent electrode 911 is pressed, the upper and lower transparent electrodes 911 and 921 will contact each other and conduct with each other.

The impact of the spacer 93 on the quality of the touch panel has the following aspects:

1. Action force: From the structure of the touch panel, the spacer 93 is used as an insulation barrier in the upper and lower conductive layers. If the film of the spacer 93 is too thick, it is easy for the user to exert a greater force when writing. The force makes the upper and lower transparent electrodes 911, 921 contact each other for induction. Therefore, the relationship between the film thickness of the spacer 93 and the force should be considered in the design.

2. Linearity: In addition to the uniformity of the resistance values of the upper and lower transparent electrodes 911 and 921, the uniformity of the spacer 93 is also an important factor affecting the touch panel. When the stylus 8 is drawn across, if the path it walks is supported by spacers 93 of uniform size, the electric field divided voltage value conducted by the upper and lower transparent electrodes 911, 921 at the moment of contact will be relatively stable, so will have better linearity. On the contrary, if the size of the spacer 93 is different, the divided voltage value of the electric field conducted by it will be relatively unstable, and the linearity will also be affected, which may easily cause misjudgment during sensing.

3. Light transmittance: The touch panel is assembled on an LCD screen or a general display, so if the touch panel can achieve a higher light transmittance, it will have a better visual effect for the user, so , the density of the spacers 93 should not be too high to avoid poor light transmittance.

The current arrangement of spacers 93, as shown in Figure 2, is generally a matrix arrangement, that is, each spacer 93 is repeatedly arranged at a fixed distance adjacent to each other, that is, in mutually perpendicular rows and columns at intervals a, b is arranged repeatedly, and the common way is a=b, that is, the arrangement of squares. In addition, as shown in FIG. 3, there are also upper and lower transparent electrodes 911, 921 with spacers 93 formed on their surfaces, and this arrangement is still based on a rectangular arrangement to maintain the distribution of the spacers 93. The density is uniform.

However, as shown in FIGS. 1 and 2 , when a force is applied downward from the force application point 912, so that the upper transparent electrode 911 sinks downward from this point to the sensing position 922 in the rectangle formed by the spacer 93, then an effective The number of spacers 93 closest to the force application point 912 is four. As shown in FIG. 3 , both the upper and lower transparent electrodes 911 and 921 are formed with spacers 93 arranged in a rectangular arrangement on their surfaces. In the use of the above two methods, taking Figure 1 as an example, since the sensing positions 922 all fall inside the rectangle, and the number of spacers 93 closest to the sensing positions 922 is four, the force applied by the above two methods requires Resisting the contact force of the above-mentioned four spacers 93 can make the upper and lower transparent electrodes 911 and 921 of the touch panel conduct inductively, which is very laborious.

Utility model content

Therefore, an object of the present invention is to provide a touch panel touch assembly made in an arrangement of dot spacers that reduces the force required for sensing.

The utility model is mainly based on the configuration of the point spacer, so that the triangle formed by the three nearest points has an inner angle value set at 45°≤inner angle≤72°, so that the arrangement can make the touch panel drive The force reaches the characteristic of descending and uniform, so that the utility model has the effect of reducing the driving force and improving the reaction time. When the inner angles are 60°, a regular triangle is formed. Because the regular triangle has equilateral characteristics, the driving force The most uniform, so it is the best configuration of the utility model.

The acute-angled triangle of the utility model is characterized in that its internal angle is not greater than or equal to 72° and not less than or equal to 45°, which has the effect of improving the sensing accuracy of the touch panel. The triangular configuration can make the deformation volume of the second conductor unit smaller, so that the force required to be applied during operation becomes smaller, and when the local contact area of the second conductor unit becomes smaller, the contact area of the second conductor unit The voltage difference ΔV will also become smaller, so the characteristic of improving the sensing accuracy can be achieved.

A regular pentagon is a unit shape that is least symmetrical and cannot be arranged periodically in a two-dimensional space, and 360° is divided into 5 equal parts, that is, 360°/5=72°, so the maximum internal angle of the utility model Determined as 72 °, and the minimum internal angle of this regular pentagon is 45 °, so the minimum internal angle of the utility model is determined as 45 °, and when the internal angle is 60 °, then form a regular triangle, because the regular angle has equal proportion symmetry characteristics, and can repeat the uniform repeated arrangement, so it is the best embodiment of the utility model.

The utility model is fixed at 45°≤inner angle≤72° for the interior angle. Another reason is to consider the problem that the side length difference is too large to reduce the driving force or the unevenness of the driving force. When an interior angle is greater than 72°, the minimum side length and The difference in the maximum side length is large, so it is easy to produce a local area with a large driving force, and also a region with a small driving force. Overall, the distribution of the driving force difference will expand.

In order to further illustrate the above purpose, structural features and effects of the present utility model, the utility model will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram illustrating a conventional stylus touching a conventional touch panel.

FIG. 2 is a schematic diagram illustrating the arrangement of spacers of the conventional touch panel.

FIG. 3 is a schematic diagram illustrating another arrangement of the spacers of the conventional touch panel.

FIG. 4 is a three-dimensional exploded view illustrating a resistive touch panel touch assembly according to a preferred embodiment of the present invention.

Fig. 5 is a schematic diagram illustrating the arrangement of the spacers of the preferred embodiment.

FIG. 6 is a schematic diagram illustrating an existing stylus touching the touch assembly of the resistive touch panel of the present invention.

Detailed ways

As shown in Figure 4, the resistive touch panel touch assembly of the preferred embodiment of the present invention includes: a first conductor unit 1, a second conductor unit 2 and a Several dot spacers 3 between; wherein, the first conductor unit 1 has a first substrate 11 and a first transparent electrode layer 12 formed on the surface of the first substrate 11; the second conductor unit 2 and the first conductive The units 1 are spaced apart and have a second substrate 21 and a second transparent electrode layer 22 formed on the surface of the second substrate 21 , and the second transparent electrode layer 22 is disposed facing the first transparent electrode layer 12 . In this preferred embodiment, the material of the first substrate 11 is a glass substrate, and the second substrate 21 is mainly a transparent film composed of a polyethylene terephthalate (PET) layer.

The first transparent electrode layer 12 and the second transparent electrode layer 22 refer to indium tin oxide (ITO) coatings, which are deposited by physical vapor deposition methods such as evaporation (evaporation), sputtering (sputtering) and the like. and the second transparent electrode layer 22 are respectively formed on the top surface of the first substrate 11 , and the second substrate 21 can also be disposed on the bottom surface 21 of the second substrate 21 by the above-mentioned evaporation or sputtering method.

Several dot spacers 3 are disposed on the first transparent electrode layer 11 . It can be known from the foregoing introduction that the dot spacer 3 is used to avoid the possibility of contact between the first conductor unit 1 and the second conductor unit 2 when the touch panel is actuated after they are bonded. In order to distribute the driving force evenly, the dot spacers 3 should be arranged regularly and periodically. On the other hand, in order to avoid the problem of easy misjudgment of touch points in the past, the distance between the dot spacers 3 should be reduced, and also Only by increasing the number of dot spacers 3 per unit area can it be ensured that the first transparent electrode layer 12 and the second transparent electrode layer 22 can contact each other under a certain pressure, but if the number of dot spacers 3 is too large, Otherwise, the transparency will be affected and the clarity of viewing will be reduced. According to practice and experiments, the distance between the dot spacers 3 should be 0.3-0.8 mm.

In addition, the dot spacer 3 implantation technology of the general resistive touch panel can be divided into two systems. Here it is explained as follows:

One is to use the so-called screen printing technology, that is, to form many small holes on a copper plate (not shown) by electroforming (electron-forming) or laser drilling (laser micro-machining) , the diameter of which is between 40 μm and 50 μm, and then put the glass substrate 1 into a screen printing machine, and use the copper plate as the screen for screen printing, so that the adhesive material flows through the small holes on the copper plate Several dot spacers 3 are formed on the first transparent electrode layer 12 , and finally cured and formed by UV-baking. The adhesive material constituting the dot spacer 3 is a mixture of materials such as urethaneacrylate, polyester acrylate, and silicon dioxide.

Another method is to use exposure and development, which is to deposit a layer of glue on the glass substrate 1, and then use a photomask (not shown) to etch the excess part by exposure and development, and the remaining The part of is the dot spacer 3.

As shown in Figure 5, the resistive touch panel touch assembly of the preferred embodiment of the utility model is to make each dot spacer 3 formed on the first transparent electrode layer 12 arranged periodically, and each dot spacer 3 is connected with The distance between adjacent point spacers 3 is the same, and every three point spacers 3 are arranged in an acute triangle 31 mode. In this preferred embodiment, the acute triangle 31 is an equilateral triangle, and any interior angle thereof is 60°. Spend. In addition, each dot spacer 3 has six adjacent dot spacers 3, so a hexagon 32 formed by the dot spacers 3 is periodically arranged.

As shown in Figures 4, 5, and 6, when the stylus 4 is used to apply force downward from the force application point 211 of the first conductive unit 1, the second transparent electrode layer 22 will sink downward from the force application point 211 on the point spacer. 3, the sensing position 121 within the acute triangle 31 formed by 3, since its sensing positions all fall within the acute triangle 31, the number of spacers 3 closest to one effective force application point 211 is three, so the force application only needs The contact force against the above-mentioned three point spacers 93 enables the touch panel to sense. In addition, the contact area of the acute-angled triangle 31 is smaller than that of the traditional rectangular arrangement, so its sensing accuracy is improved.

In particular, in terms of design, for example, regular pentagons are the most asymmetric arrangement. Each internal angle of a regular pentagon is 72 degrees. Then any internal angle is 45 degrees, inferring any three adjacent point spacers 93 of this preferred embodiment, except that any internal angle of the above-mentioned acute triangle 31 is an example of 60 degrees, any internal angle is between 45 degrees and Between 72 degrees are the implementation states applicable to this arrangement.

Compared with the previous dot spacers whose sensing positions all fall inside the rectangle, the number of the nearest neighbor dot spacers to the sensing position is four, so it is necessary to resist the contact force of the four dot spacers in order to make the first transparent electrode layer 12 and the second transparent electrode layer 22 are inductively conducted, which is very laborious. In the arrangement of the dot spacers 3, the resistive touch panel touch assembly of the present utility model adopts any three nearest dot spacers 3 in an acute-angled triangle 31 are periodically arranged, so that when force is applied, it is only necessary to resist the contact force of the three point spacers 93 to make the touch panel sense, which is relatively labor-saving. And because the contact area of the acute-angled triangle 31 is smaller than that of the traditional rectangular arrangement, the sensing accuracy thereof is improved.

Claims (6)

1. A resistive touch panel touch assembly, comprising a first conductor unit, a second conductor unit spaced apart from the first conduction unit, and several mutually scattered and arranged on the first transparent electrode layer and The dot spacer on one surface of the second transparent electrode layer is characterized by: The first conductor unit has a first substrate and a first transparent electrode layer formed on the surface of the first substrate; The second conductor unit has a second substrate and a second transparent electrode layer formed on the surface of the second substrate, the second transparent electrode layer faces the first transparent electrode layer; The three nearest neighbors of the dot spacers form an acute triangle. 2. The resistive touch panel touch assembly according to claim 1, characterized in that: The first substrate is made of glass, the second substrate is a transparent film made of polyethylene terephthalate, and the first transparent electrode layer and the second transparent electrode layer are made of indium tin oxide. become. 3. The resistive touch panel touch assembly according to claim 1, characterized in that: The acute triangle formed by the three nearest neighbors of the point spacer is an equilateral triangle. 4. The resistive touch panel touch assembly according to claim 1, characterized in that: Any interior angle of the acute triangle formed by the three nearest neighbors of the point spacer is not more than 72 degrees and not less than 45 degrees. 5. The resistive touch panel touch assembly according to claim 1, characterized in that: The dot spacer is formed on the first transparent electrode layer by screen printing. 6. The resistive touch panel touch assembly according to claim 1, characterized in that: The dot spacer is formed on the first transparent electrode layer by exposure and development.

Images