CN114879867A - Mobile phone touch screen with high-sensitivity multi-point recognition function - Google Patents

Abstract

The invention provides a mobile phone touch screen with high sensitivity and multipoint recognition function, which relates to the technical field of touch screens, wherein the top of an LCD screen is provided with a substrate base plate, a lower optical adhesive layer is arranged between the substrate base plate and the LCD screen, the top surface of the substrate base plate is provided with a coating layer, the coating layer contains sensing patterns, the sensing patterns are positioned in the same horizontal plane, the sensing patterns are triangular structures, the heads of the triangular structures are subjected to topping treatment, the top surface of the substrate base plate is provided with conductive strips, and the side surfaces of the conductive strips are provided with connecting strips. Most importantly, the production cost of a manufacturer can be reduced, and the benefit can be maximized.

Description

Mobile phone touch screen with high-sensitivity multi-point recognition function

Technical Field

The invention relates to the technical field of touch screens, in particular to a mobile phone touch screen with a high-sensitivity multi-point identification function.

Background

With the wide application of electronic products such as smart phones and tablet computers and the development of touch screen technologies, the application of touch screens to electronic products such as smart phones and tablet computers to realize human-computer interaction functions has become a trend of the development of current electronic products.

Chinese patent No. CN101976164A discloses a capacitive touch screen, in which an electrode supporting layer, an adhesive layer and an outer supporting layer are made of flexible materials, and a sandwiched structure is formed between the layers, so that the capacitive touch screen is flexible and bendable; because each layer is made of flexible materials, the thickness of each layer can be freely set, and the purposes of being thinner and freely designing capacitance parameters are achieved; the outer supporting layer not only has a covering effect, but also has a supporting effect on the first sensing electrode and the second sensing electrode, when the capacitive touch screen is bent, the outer supporting layer and the electrode supporting layer are correspondingly bent, and the outer supporting layer and the electrode supporting layer interact with each other to limit the deformation of the first sensing electrode and the second sensing electrode and prevent the first sensing electrode and the second sensing electrode from being easily broken. Furthermore, the sensing electrode layer is arranged at the middle position of the capacitive touch screen in the thickness direction, so that when the capacitive touch screen is bent, the first sensing electrode and the second sensing electrode are not easy to break at the crossed position, and the capacitive touch screen has high reliability.

The mobile phone touch screen with the existing multi-point recognition function is mostly provided with double-layer sensing patterns, the processing technology of the double-layer sensing patterns is complex, the production cost is increased, the light transmittance of the touch screen is reduced along with the increase of film layers, the brightness of the touch screen can be increased by a user, and the large energy consumption is generated.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the mobile phone touch screen with the high-sensitivity multi-point recognition function, so that the problems that the processing technology is complex and the production cost is high when double-layer sensing patterns are arranged in the touch screen are solved, the overall thickness of the touch screen is reduced, the bonding technology between two layers of electrodes is reduced, and the poor conditions that bubbles, creases, foreign matters are easy to attach and the like are avoided in the bonding process.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: cell-phone touch-sensitive screen with high sensitivity multiple spot recognition function, including the LCD screen, the top of LCD screen is equipped with substrate base plate, be equipped with down the optical cement layer between substrate base plate and the LCD screen, substrate base plate's top surface is equipped with the coating, the coating contains the response pattern, the response pattern is located same horizontal plane, and the response pattern is axisymmetric structure about substrate base plate, the response pattern is the triangle-shaped structure, and the head of triangle-shaped structure is through paring the processing.

Preferably, the top surface of the coating layer is provided with an upper optical adhesive layer and a mask marking layer, the coating layer and the mask marking layer are adhered through the upper optical adhesive layer, and the top surface of the mask marking layer is provided with a covering layer.

Preferably, the coating layer is an ITO coating layer, the maximum thickness of the ITO coating layer is 100nm, and the substrate base plate is a glass substrate.

Preferably, the covering layer is made of aluminosilicate glass through tempering, the thickness of the mask marking layer is 100nm, and the vertical projection of the mask marking layer is superposed with that of the substrate base plate.

Preferably, the top surface of the substrate base plate is provided with a conductive strip, the conductive strip is connected with the induction pattern through an ITO coating, and the side surface of the conductive strip is provided with a wiring strip.

Preferably, the sensing patterns are divided into two large unit patterns which are symmetrical left and right, and the distance between the two groups of patterns is 0.3 mm.

Preferably, the top surface of the substrate base plate is provided with a wiring area, a connection wiring is arranged in the wiring area and is an ITO coating, the width of the wiring area is 0.1mm, the width of the innermost connection wiring at the left side and the right side of the substrate base plate is 0.1mm and is increased towards the outer side in sequence, and the increment of each time is 0.01 mm.

(III) advantageous effects

The invention provides a mobile phone touch screen with a high-sensitivity multi-point identification function. The method has the following beneficial effects:

1. the invention is provided with a substrate base plate on the top of the LCD screen, a lower optical adhesive layer is arranged between the substrate base plate and the LCD screen, the top surface of the substrate base plate is provided with a coating layer, the coating layer contains induction patterns, the induction patterns are positioned in the same horizontal plane, the top surface of the substrate base plate is provided with a conductive strip, the conductive strips are connected with the induction patterns through the ITO coating, the side surfaces of the conductive strips are provided with connecting strips, in this design process, the sensing pattern is a single layer non-bridging pattern, compared to a double layer sensing pattern, the design process is less, the whole coating layer is smoother, the entering of stains and other foreign matters is avoided, the light transmittance of the touch screen is improved, and it can meet the requirements of the present consumers for thinner and lighter mobile phones and longer flight time, and the most important point is that the production cost of manufacturers can be reduced, and the maximum benefit is achieved.

2. The sensing pattern is in a triangular structure, the head of the triangular structure is subjected to topping treatment, the triangular structure has the characteristics of simple wiring structure, few electrodes and the like, the topping treatment is performed on the head of each triangle, the situation that electric charges are excessively concentrated on the tops of the triangles and the relative impedance of the head is extremely large can be prevented, the size of the touch screen can be increased under the condition that the touch pins which can be supported by the existing touch IC are fixed, the touch precision is not influenced, and the high sensitivity of the touch screen is ensured.

Drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a top view of a coating layer of the present invention;

FIG. 5 is a comparison of a single layer non-bridging pattern and a double layer sensing pattern in accordance with the present invention.

Wherein: 1. a wire connection strip; 2. a cover layer; 3. an LCD screen; 4. a mask marking layer; 5. an upper optical adhesive layer; 6. a coating layer; 7. a substrate base plate; 8. a lower optical adhesive layer; 9. a conductive strip; 10. sensing the pattern; 11. a wiring area; 12. and connecting the wires.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1-5, the mobile phone touch screen with high sensitivity and multi-point recognition function comprises an LCD screen 3, a substrate base plate 7 is arranged on the top of the LCD screen 3, a lower optical adhesive layer 8 is arranged between the substrate base plate 7 and the LCD screen 3, a coating layer 6 is arranged on the top surface of the substrate base plate 7, the coating layer 6 contains sensing patterns 10, the sensing patterns 10 are located in the same horizontal plane, the sensing patterns 10 are in an axisymmetric structure with respect to the substrate base plate 7, the sensing patterns 10 are in a triangular structure, and the head of the triangular structure is subjected to top-cutting treatment. The top surface of 6 coats is equipped with optical cement layer 5 and mask and marks layer 4, and 6 coats 6 and mask and marks layer 4 and paste through last optical cement layer 5, and the top surface that layer 4 was marked to the mask is equipped with overburden 2, and 6 coats 6 for the ITO coating, and the maximum thickness of ITO coating is 100nm, and substrate 7 is the glass substrate. The covering layer 2 is made of aluminosilicate glass through tempering, the thickness of the mask marking layer 4 is 100nm, and the vertical projection of the mask marking layer 4 is superposed with that of the substrate base plate 7. The top surface of the substrate base plate 7 is provided with a conductive strip 9, the conductive strip 9 is connected with the sensing pattern 10 through an ITO coating, and the side surface of the conductive strip 9 is provided with a wiring strip 1. The sensing pattern 10 is divided into two large unit patterns which are symmetrical left and right, and the distance between the two groups of patterns is 0.3 mm. The top surface of the substrate base plate 7 is provided with a wiring area 11, a connection wiring 12 is arranged in the wiring area 11, the connection wiring 12 is an ITO coating, the width of the wiring area 11 is 0.1mm, the width of the innermost connection wiring 12 on the left side and the innermost connection wiring 12 on the right side is 0.1mm, the width of the innermost connection wiring is increased towards the outer side in sequence, and the increment of each time is 0.01 mm.

The touch screen does not need the covering layer 2, the thinner the covering layer 2 is, the higher signal-to-noise ratio and the better sensing sensitivity can be obtained, the mask marking layer 4 is positioned below the covering layer 2, the wires and the edge of the LCD screen 3 can be hidden, and the marking characters or icons can be increased in design, but the marker must be pressed on the substrate 7 of the ITO coating in a relatively flat mode, the marker material is non-conductive, the thinner the upper optical adhesive layer 5 is, the better the signal-to-noise ratio is, the higher the dielectric constant optical adhesive can have the better sensing finger capacitance, the higher the signal-to-noise ratio can be obtained, the lower the resistance of the ITO coating in unit area is, the better the signal-to-noise ratio is; the thinner the ITO coating, the better the light transmittance, the thicker the lower optical glue layer 8, the better the signal to noise ratio compared to the upper optical glue layer 5, which is typically used in conjunction with anisotropic conductive glue.

Example two:

in practical design, according to the size of human finger, the height h1 of the bottom end of the three truncated triangles corresponding to the finger is generally taken as 1.76mm, the height h2 of the top end is taken as 0.42mm, the body width w is taken as 0.7mm, the height of each single pattern is controlled to be about 7.5mm, the distance h3 between the adjacent ITO patterns of the same pair is taken as 0.3mm, then the logarithm of the sensing pattern 10 of the ITO coating used is determined according to the data and the size of the whole screen, a plurality of groups of the strips are arranged into a row array of the touch screen, the topmost triangular pattern and the bottommost triangular pattern are subjected to the flattening treatment, and the ground areas with the height of 0.5mm are added at the head and the tail, the distance between the ground areas and the nearest patterns is 0.3mm, so as to eliminate the influence of the routing on the capacitance variation of the top end and bottom end patterns, the red routing on both sides is the silver routing which is outside the visible area, the line spacing is 0.09mm, the innermost line width is 0.09mm, the outward lines are sequentially widened by 0.01mm, but the distance from the outermost silver line to the screen edge in the whole screen is at least 0.5 mm.

Example three:

the single-side bridging structure means that the ITO coatings of the X axis and the Y axis are in the same horizontal plane, and bridging is carried out at the intersection in a mode of adding silicon dioxide so as to avoid XY short circuit. The XY of the structure is on the same layer, the structure is simple, the cost is low, the yield is high, the single-point gesture adding function can be realized, but the process is slightly complex, and a mask layer needs to be added. At present, two bridging modes are 1, ITO bridging 2 and metal bridging. Compared with the metal bridging, the ITO bridging process has the advantages that one more process is added, the price is higher, the metal bridging process is relatively simple, the cost is lower, but the whole ITO plane is uneven at the single-side bridging position, dirt and other foreign matters are easy to enter, and further the light transmittance is influenced; are not conducive to the determination of the reference; meanwhile, the process is more complicated, and the probability of ITO pattern deformation is increased; the sensing pattern 10 is a single-layer non-bridging pattern, compared with a double-layer sensing pattern 10, the design process is less, the whole coating layer 6 is more smooth, the entering of stains and other foreign matters is avoided, the light transmittance of the touch screen is improved, the requirements of the current consumers on the thinness, the lightness and the longer endurance time of the mobile phone can be met, the most important point is that the production cost of manufacturers can be reduced, and the maximization of benefits is achieved.

Example four:

the touch screen has a rule in the structural design that when a finger touches (covers at most two units), the sum of the covered areas of adjacent capacitance units is constant when the finger moves transversely and longitudinally, a certain area of one capacitance unit is reduced or increased, a certain area of the other capacitance unit is increased or reduced correspondingly, the change of the covered area indirectly causes the change of the capacitance value, and the centroid position of a touched object can be determined according to the change of the differential capacitance between the adjacent capacitance units. The touch point algorithm is verified after actual test data. Corresponding algorithm adjustment can be set on the design of a contact point position algorithm according to the sensitivity, the resolution, the anti-interference performance and the like of the touch screen by the capacitance counting difference value, generality is not lost, 3-point, 4-point or even more-point touch positioning can be realized on the basis of realizing two-point touch, and the positioning algorithm is certainly complicated by more-point touch positioning. This document discusses and implements two-point touches. The maximum difficulty of determining the position by two-point touch is to find two capacitance change maximum values on each axis, and the determination method comprises the steps of comparing the sizes of the capacitance unit and the adjacent two capacitance units, determining a first effective maximum value if the size is larger than the change value of the adjacent two capacitance units, and determining a second effective maximum value by the same comparison method. Certainly, at two boundaries of the touch screen, the larger the variation value of the adjacent capacitance units is, the larger is the effective maximum value. In addition, whether the capacitance unit corresponding to the maximum value reaches the total number of the capacitance units or not is considered at any time in the process so as to determine whether a valid maximum value needs to be searched again or not. And after finding the effective maximum value point, determining the position of the contact by using the differential capacitance change between the adjacent capacitance units.

The working principle of the invention is as follows: the projected capacitive touch screen utilizes electrostatic field lines emitted by the electrodes of the touch screen for sensing. There are two types of capacitors commonly used in projected capacitance sensing technology, self-capacitance, also known as absolute capacitance, which is a widely used method of using the sensed object as the other plate of the capacitor, which induces a charge between the sensing electrode and the sensed electrode, so that the sensed charge is stored in the resulting capacitive coupling. The interaction capacitance is also called crossover capacitance, and is the capacitance generated by coupling of adjacent electrodes. When a sensed object approaches the electric field lines from one electrode to the other, a change in the mutual capacitance is sensed, and the position is determined. In the two types of projected capacitive sensors, the sensing capacitor can be designed according to a certain method so as to detect the touch of a finger at any given time, the touch is not limited to one finger, but can be multiple fingers, the top surface of the substrate base plate 7 is provided with the coating layer 6, the coating layer 6 contains the sensing pattern 10, the sensing pattern 10 is positioned in the same horizontal plane, the top surface of the substrate base plate 7 is provided with the conductive strip 9, the conductive strip 9 is connected with the sensing pattern 10 through the ITO coating, and the side surface of the conductive strip 9 is provided with the wiring strip 1 The requirement of longer endurance time is that the production cost of manufacturers can be reduced, the maximum benefit is achieved, the sensing pattern 10 is of a triangular structure, and the head of the triangular structure is subjected to topping processing, so that the sensing pattern has the characteristics of simple wiring structure, few electrodes and the like.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. Cell-phone touch-sensitive screen with high sensitivity multiple spot recognition function, including LCD screen (3), its characterized in that: the top of LCD screen (3) is equipped with substrate base plate (7), be equipped with down optical cement layer (8) between substrate base plate (7) and LCD screen (3), the top surface of substrate base plate (7) is equipped with coating (6), coating (6) contain response pattern (10), response pattern (10) are located same horizontal plane, and response pattern (10) are axisymmetric structure about substrate base plate (7), response pattern (10) are the triangle-shaped structure, and the head of triangle-shaped structure is through cutting a top the processing.

2. The touch screen of the mobile phone with the high-sensitivity multi-point recognition function according to claim 1, wherein: the top surface of coating (6) is equipped with optical cement layer (5) and mask and marks layer (4), and coating (6) and mask mark layer (4) and paste through last optical cement layer (5), the top surface that the mask marked layer (4) is equipped with overburden (2).

3. The touch screen of the mobile phone with the high-sensitivity multi-point recognition function according to claim 1, wherein: the coating layer (6) is an ITO coating, the maximum thickness of the ITO coating is 100nm, and the substrate base plate (7) is a glass substrate.

4. The touch screen of the mobile phone with the high-sensitivity multi-point recognition function according to claim 2, wherein: the covering layer (2) is made of aluminosilicate glass through tempering, the thickness of the mask marking layer (4) is 100nm, and the vertical projection of the mask marking layer (4) is superposed with that of the substrate base plate (7).

5. The touch screen of the mobile phone with the high-sensitivity multi-point recognition function according to claim 1, wherein: the top surface of the substrate base plate (7) is provided with a conductive strip (9), the conductive strip (9) is connected with the induction pattern (10) through an ITO coating, and the side surface of the conductive strip (9) is provided with a wiring strip (1).

6. The touch screen of the mobile phone with the high-sensitivity multi-point recognition function according to claim 1, wherein: the induction pattern (10) is divided into two large unit patterns which are symmetrical left and right, and the distance between the two groups of patterns is 0.3 mm.

7. The touch screen of the mobile phone with the high-sensitivity multi-point recognition function according to claim 1, wherein: the top surface of substrate base plate (7) is equipped with wiring district (11), be equipped with in wiring district (11) and connect and walk line (12), and connect and walk line (12) and be the ITO coating, the width in wiring district (11) is 0.1mm, and the width of walking line (12) is 0.1mm and increase in proper order to the outside in the most inboard connection in the both sides of substrate base plate (7) left and right sides, and the increase amount at every turn is 0.01 mm.

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