Large-size multi-touch OGF touch display module and manufacturing method thereof

Abstract

The invention discloses a large-size multi-touch OGF (On Glass Fiber) touch display module and a manufacturing method thereof. The manufacturing method comprises the following steps of: manufacturing an RX lantern-shaped pattern conductive circuit layer for sensing and receiving a touch signal on a conductive surface of a cover plate with the size of more than 21.5 inches; manufacturing a TX lantern-shaped pattern conductive circuit layer for driving signals on the conductive surface of the TX conductive layer with the size of more than 21.5 inches (inclusive); the touch display module is formed by integrating the lantern-shaped pattern conductive circuit layer of the induction electrode RX, the lantern-shaped pattern conductive circuit layer of the driving electrode TX and the cover plate serving as a protective layer. The protection layer used for protecting the cover plate and the functional layer used for receiving the signals are combined into a whole, the functions of protecting and receiving the signals are achieved, and thinning of the single-layer mutual capacitance type OGF touch display module is achieved.

Description

Technical Field

[0001] The present invention relates to a large-size, multi-touch OGF touch display module and a manufacturing method thereof, and in particular to an OGF touch display module with a size of 21.5 inches (inclusive) or more and a touch point of more than 10 and a manufacturing method thereof. Background Art

[0002] With the upgrading of consumer electronics, touch screens are increasingly used in people's daily lives. Existing touch technologies are roughly divided into resistive, capacitive, electromagnetic induction, ultrasonic and optical, etc. Capacitive touch technology is further divided into self-capacitance and mutual-capacitance. Self-capacitive touch panels are realized through a single-layer electrode structure with a simple process, but it is difficult to achieve multi-touch function. With the demand for touch experience by consumers, GF products based on single-point + gesture or single-layer two-point self-capacitive touch can no longer meet the requirements of consumers and are gradually eliminated. Mutual-capacitive touch screens are widely used for their super sensitivity and multi-touch functions. Mutual-capacitive touch screens are generally designed with two layers of ITO electrodes for circuit design to achieve the required touch function. The touch components of mainstream touch screens are hidden under the first cover plate, that is, the glass cover plate protection layer and the functional layer are two independent components, which are then bonded together with optical glue to form TP (Touch panel). This most conventional product structure makes the production and processing technology of various touch screen manufacturers similar, that is, a layer of glass cover plate plays a role in protecting the touch screen and aesthetics, and a layer of functional sheet processed by ITO glass (such as GG capacitive screen structure) or ITO film (such as GF\GFF capacitive screen structure). At present, the structures of this product on the market mainly include GF\GFF\GG, which have the following disadvantages: the cover plate and the functional sheet need to be opened independently, which takes a long time and has a high cost; the cover plate and the functional sheet processing plant are two independent processing units, which takes a long time to produce and requires a long material turnover time; the application field is relatively limited, and it is only used in small-sized consumer products below 10.1 inches, such as mobile phone screens, and the maximum number of touch points only supports 5 touch points, and the touch experience is poor.

[0003] Mutual capacitive touch technology is divided into two technical routes: external technology and embedded technology according to the different sensor embedding positions. The world's major touch screen manufacturers, such as TFT or AMOLED panel manufacturers, tend to develop embedded technology (In Cell Touch), which directly makes the sensor in the display. This technical route can be roughly divided into two technologies: In-cell and On-cell. The advantage of embedded touch is that it can save a piece of glass and a bonding process, effectively reducing the overall thickness of the touch screen. However, since the panel factory that introduces embedded technology must have LTPS (Low Temperature Poly-Silicon) technology, the entry threshold is relatively high, and the current process yield is low, and it has not been widely promoted in the industry. In terms of cost, the original intention of in-cell technology is to reduce costs and thickness. As long as touch-on-lens can achieve some effects, the marginal effect brought by in-cell is not so obvious. However, in terms of overall cost, it will not bring obvious cost savings. The reason why In-cell is difficult to ensure yield and display performance is that the touch sensor function needs to be embedded inside the pixels on the TFT array substrate. To this end, complex semiconductor manufacturing processes must be used, which becomes a stumbling block to improving yield. In addition, since the touch sensor is embedded in the pixel, the pixel area that can be used for display will be reduced, which is the main reason for the deterioration of image quality (such as reduced brightness, reduced resolution, etc.). In terms of touch limitations, compared with the external touch screen structure, the selection range of In-Cell / On-Cell touch IC chips is smaller. In-Cell / On-Cell screens need to be embedded with matching touch IC chips, otherwise it is easy to cause erroneous touch sensing signals or excessive noise.

[0004] On the other hand, the ultra-thin design makes the panel fragile, so the cover glass is indispensable. The original intention of in-cell is to reduce the thickness, but it is still difficult to save the cover layer. From this perspective, the in-cell technology route has actually lost its meaning. As a typical representative of On-Cell technology, it is mostly used in Samsung Amoled panel products. This route has not technically overcome the problem of thinness, and it also produces color unevenness when touching.

[0005] The external touch module GF\GFF\GG technology usually works by using human body current induction. When a finger touches the screen, the capacitance value at the touch point will change, which will be detected by the touch chip and converted into touch coordinate information.

[0006] Compared with In-cell and other technologies, the touch screen OGF (One Glass Film) technology is a new type of touch display technology and an upgraded product of OGS (One Glass Solution) technology. OGF technology directly makes the touch sensor on the cover glass to form an integrated structure, reducing the bonding layer in the middle and making the overall thickness of the screen thinner. Since the touch sensor is closely combined with the cover glass, the transmission of the touch signal is more direct and fast, and the user's touch operation can be more accurately sensed. OGF technology reduces the refraction and reflection of light when it propagates between different media, making the screen's light transmittance higher. Compared with In-cell and other technologies, the cost of OGF technology is relatively low, and at the same time it inherits the excellent performance of OGS technology, with a high cost performance. It is widely used in the field of large-size touch screens, such as 21.5, 23.8, 27, 32-inch touch screens, such as high-end tablet computers, industrial control equipment, smart conference all-in-one machines, education all-in-one machines, etc., which can meet the needs of these fields for high precision, high sensitivity, high stability and good visual effects of touch screens. Summary of the invention

[0007] In view of the technical problems existing in the prior art, the present invention aims to provide a large-size, multi-touch OGF touch display module and a manufacturing method thereof, which can combine a protective layer and a functional layer into one, has the functions of protection and signal receiving, and eliminates the independent mold opening and independent processing steps of the cover plate and the functional sheet.

[0008] According to one aspect of the present invention, there is provided a large-size, multi-touch OGF touch display module, characterized in that it comprises a cover plate, a functional layer for receiving signals and a functional layer for transmitting signals, wherein the functional layer for receiving signals is made on a conductive surface on the cover plate, and is formed by a lantern-shaped pattern conductive circuit layer of sensing electrodes RX for sensing and receiving touch signals, and the functional layer for transmitting signals is formed by a lantern-shaped pattern conductive circuit layer of driving electrodes TX for transmitting touch signals, characterized in that the lantern-shaped pattern conductive circuit layer RX located at the upper part is bonded to the lantern-shaped pattern conductive circuit layer TX located at the lower part, so that the sensing electrode unit of each sensing electrode RX and the driving electrode unit of the driving electrode TX are alternately arranged on the same layer, and the touch display module is formed in a manner that the lantern-shaped pattern conductive circuit layer of the sensing electrode RX, the lantern-shaped pattern conductive circuit layer of the driving electrode TX and the cover plate as a protective layer are integrated.

[0009] In the present invention, the lantern shape refers to a shape similar to a lantern in appearance. For example, for a prismatic pattern, two opposite corners thereof are flattened to form a neck portion, so that the sensing electrode RX or the driving electrode TX presents a lantern shape as a whole. For another example, for an elliptical pattern, two opposite spherical caps thereof are flattened to form a neck portion, so that the sensing electrode RX or the driving electrode TX presents a lantern shape as a whole. In the present invention, if Figure 3-7 As shown, the explanation is given by taking the lantern shape of the neck portion formed by flattening the two opposite corners of the prism pattern as an example, however, those skilled in the art understand that the lantern shape can also be a lantern shape similar to a pumpkin by flattening the spherical crown of an elliptical pattern.

[0010] According to the above-mentioned OGF touch display module, since not only the touch sensing layer is made on a piece of glass or a film cover, but also the drive emission layer is attached to the same layer of the touch sensing layer, its TP thickness can be as thin as less than 1mm, so the size of OGF can be made proportional to that of OC (On-cell), and large-size, multi-touch touch can be achieved.

[0011] According to the above-mentioned OGF touch display module, it is characterized in that the angular portion of the RX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent RX units, and the angular portion of the TX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent TX units, and each RX channel formed by each RX lantern-shaped pattern conductive circuit layer and each TX channel formed by each TX lantern-shaped pattern conductive circuit layer intersects at their respective neck portions.

[0012] According to the above-mentioned OGF touch display module, it is characterized in that the RX lantern-shaped pattern and the TX lantern-shaped pattern intersect with the rhombus edges of the adjacent RX lantern-shaped pattern and TX lantern-shaped pattern after the neck parts of their respective RX channels and TX channels are turned at right angles.

[0013] According to the above-mentioned OGF touch display module, it is characterized in that the distance from the neck part of the RX lantern-shaped pattern to the diamond side of the adjacent TX lantern-shaped pattern is greater than the distance between the adjacent diamond sides of the RX lantern-shaped pattern and the adjacent TX lantern-shaped pattern at the intersection point.

[0014] According to the above-mentioned OGF touch display module, it is characterized in that the distance from the neck part of the TX lantern-shaped pattern to the diamond side of the adjacent RX lantern-shaped pattern is greater than the distance between the adjacent diamond sides of the TX lantern-shaped pattern and the adjacent RX lantern-shaped pattern at the intersection point.

[0015] According to another aspect of the present invention, a method for manufacturing a large-size, multi-touch OGF touch display module is provided, characterized in that it includes the following steps: A. Coating is performed on the screen printing surface of the cover plate, that is, indium tin oxide is sputtered onto the cover plate through a magnetron sputtering process to form a conductive surface; B. A lantern-shaped pattern conductive circuit layer of a sensing electrode RX for sensing and receiving touch signals is manufactured on the conductive surface of the cover plate, forming a cover plate with a lantern-shaped pattern conductive circuit layer of the sensing electrode RX, and integrating the lantern-shaped pattern conductive circuit layer of the sensing electrode RX as a functional layer having a signal receiving function and the cover plate as a protective layer; C. Bind the flexible circuit board to the RX lantern-shaped pattern conductive circuit layer of the sensing electrode; D. Use ITO glass or ITO film as a substrate, and make the conductive surface of the driving electrode TX on the substrate; E. Make a TX lantern-shaped pattern conductive circuit layer on the conductive surface of the driving electrode TX; F. Firstly bond the optical adhesive to the TX lantern-shaped pattern conductive circuit layer, and then use a cutting machine to cut out the outline of the TX lantern-shaped pattern conductive circuit layer to make it a functional layer for transmitting signals, and then bind the flexible circuit board to the TX lantern-shaped pattern conductive circuit layer; G. The cover plate with the RX lantern-shaped pattern conductive circuit layer on the upper part and the TX lantern-shaped pattern conductive circuit layer on the lower part are laminated by a laminating machine, so that the sensing electrode units of each sensing electrode RX and the driving electrode units of the driving electrode TX are alternately arranged on the same layer to form a touch display module.

[0016] According to the above method, it is characterized in that the angular portion of the RX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent RX units, and the angular portion of the TX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent TX units, and each RX channel formed by each RX lantern-shaped pattern conductive circuit layer and each TX channel formed by each TX lantern-shaped pattern conductive circuit layer intersects at their respective neck portions.

[0017] According to the above method, it is characterized in that the RX lantern-shaped pattern and the TX lantern-shaped pattern intersect with the rhombus sides of the adjacent RX lantern-shaped pattern and TX lantern-shaped pattern after the neck parts of the respective RX channels and TX channels are turned at right angles.

[0018] According to the above method, it is characterized in that the distance from the neck portion of the RX lantern-shaped pattern to the rhombus side of the adjacent TX lantern-shaped pattern is greater than the distance between the adjacent rhombus sides of the RX lantern-shaped pattern and the adjacent TX lantern-shaped pattern at the intersection point.

[0019] According to the above method, it is characterized in that the distance from the neck portion of the TX lantern-shaped pattern to the rhombus side of the adjacent RX lantern-shaped pattern is greater than the distance between the adjacent rhombus sides of the TX lantern-shaped pattern and the adjacent RX lantern-shaped pattern at the intersection point.

[0020] The present invention further comprises the steps of manufacturing the RX lantern-shaped pattern conductive circuit layer and the TX lantern-shaped pattern conductive circuit layer, which are printing, baking and photolithography in sequence; the printing process is as follows: placing the conductive ink on a patterned screen, and then printing the ink on the conductive surface of the cover plate or the conductive surface of the TX conductive layer through a scraper; the baking process is as follows: placing the cover plate or TX conductive layer printed with the pattern into an oven or an IR tunnel oven for baking; the photolithography process is as follows: placing the baked cover plate or TX conductive layer on a photolithography machine platform for etching the circuit to form the circuit required for the touch screen.

[0021] According to the present invention, the design of the RX lantern-shaped pattern conductive circuit layer and the TX lantern-shaped pattern conductive circuit layer (hereinafter referred to as RX and TX) described in the present invention can avoid functional failure caused by fitting deviation. According to this design, since the neck parts of the RX channel and the TX channel are respectively turned at right angles to intersect with the lantern-shaped shape, the spacing from the RX neck to the TX lantern-shaped edge or the TX neck to the RX lantern-shaped edge is increased, avoiding excessive fitting deviation that causes the RX neck to intersect with the TX lantern-shaped edge or the TX neck to intersect with the RX lantern-shaped edge, resulting in poor capacitance sensing values ​​of both the RX channel and the TX channel.

[0022] According to the present invention, the OGF touch display module of the present invention with a size of 21.5 inches (inclusive) or more and a touch point of more than 10 points has innovated the TX driving electrode and RX sensing electrode unit pattern into a lantern shape compared to the G1F product. The product size has exceeded 21.5 inches (inclusive) or more and supports a touch point of more than 10 points.

[0023] According to the present invention, the cover plate as a part of the touch carrier is combined with a conductive layer with touch function to form a new type of OGF touch display module, namely ONE GLASS FILM, which combines the protection layer and the functional layer into one and has the functions of protection and signal receiving.

[0024] According to the present invention, the OGF touch display module that can achieve 21.5 inches (inclusive) or more and more than 10 points of touch has a relatively large difference in structure from the traditional mutual capacitance incell / oncell module. Equivalent to incell / oncell, if the product is directly exposed to the surface, if the surface layer is not protected, the product is very easy to be scratched, and even the display effect is affected. The OGF fully laminated product combines the glass protection layer and the functional layer into one, and then fully laminates with the liquid crystal, which can not only enhance the scratch resistance of the touch module, but also the glass protection layer as a part of the functional component, after being laminated with the ITO film layer, it can also play an explosion-proof role.

[0025] The cover plate is an important component that mainly serves the functions of protection and aesthetics in the touch screen. By processing the cover plate and using the principle of mutual capacitance touch screen, the RX conductive circuit layer responsible for receiving the sensing touch signal is made on the silk-screen surface of the cover plate through coating and other methods, eliminating the need for independent mold opening and independent processing of the cover plate and functional sheet, reducing costs and pursuing innovation in terms of cost, labor, time, turnover, etc., while meeting the market trend of lightweight and thin terminal electronic products.

[0026] The TX lantern-shaped pattern conductive circuit layer, which is used as the mutual capacitive touch screen to transmit the driving signal, is bonded to the upper surface of the RX lantern-shaped pattern conductive circuit, which can form an OGF touch screen of 21.5 inches (inclusive) or above and realize multi-touch, such as 10-point, 20-point, 40-point and other multi-touch. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 (a)~ Figure 1 (e) shows schematic diagrams of the structures of touch modules GG / GFF / GF / In-cell / On-cell in the prior art respectively.

[0028] Figure 2 A schematic structural diagram of an OGF touch display module according to a specific embodiment of the present invention is shown.

[0029] Figure 3 A schematic diagram showing a TX lantern-shaped pattern conductive circuit layer of an OGF touch display module according to a specific embodiment of the present invention.

[0030] Figure 4 Show Figure 3 A local enlarged schematic diagram of four adjacent driving electrode units at any point A in the TX lantern-shaped pattern conductive circuit layer.

[0031] Figure 5 A schematic diagram showing a conductive circuit layer of an RX lantern-shaped pattern of an OGF touch display module according to a specific embodiment of the present invention.

[0032] Figure 6 Show Figure 4 A local enlarged schematic diagram of four adjacent sensing electrode units at any point B in the RX lantern-shaped pattern conductive circuit layer.

[0033] Figure 7 Show Figure 3 TX lantern-shaped pattern conductive circuit layer and Figure 5 The enlarged diagram of the connection at the intersection of the RX lantern-shaped pattern conductive circuit layers when they are bonded together.

[0034] Figure 8 A schematic diagram showing the process flow of a method for manufacturing an OGF touch display module according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0035] The OGF touch display module and the manufacturing method thereof of the present invention will be further described in detail below with reference to the accompanying drawings in combination with specific embodiments.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The mutual capacitance OGF touch screen uses ITO (indium tin oxide) to make horizontal TX electrodes and vertical RX electrodes. The intersection of the two sets of electrodes will form a capacitor, that is, the two sets of electrodes constitute the two poles of the capacitor. When a finger touches the capacitive screen, the coupling state between the two electrode units near the touch point is changed, thereby changing the capacitance between the two electrode units. When detecting the size of the mutual capacitance, the horizontal TX electrode sends out an excitation signal in turn, and all the vertical RX electrodes receive the signal at the same time, so that the capacitance value of all the intersection points of the horizontal TX and vertical electrodes RX can be obtained, that is, the capacitance size of the two-dimensional plane of the entire touch screen. Similarly, when a human finger approaches the touch screen, it will cause the local capacitance to decrease. According to the two-dimensional capacitance change data of the touch screen, the coordinates of each touch point can be calculated. Therefore, for the OGF touch screen, even if there are multiple touches on the screen, the true coordinates of each touch point can be calculated one by one.

[0038] Figure 1 (a)~ Figure 1 (e) shows schematic diagrams of the structures of touch modules GG / GFF / GF / In-cell / On-cell in the prior art respectively. Figure 2A schematic structural diagram of an OGF touch display module according to a specific embodiment of the present invention is shown.

[0039] like Figure 1 (a)~ Figure 1 As shown in (e), in various modes of touch module structures in the prior art such as GG / GFF / GF / In-cell / On-cell, either the thickness of the touch panel TP cannot be reduced due to the multi-layer structure, or the display panel structure is complicated. In contrast, in the present invention, Figure 2 As shown, as a touch panel TP, the sensing electrode layer as a functional layer for receiving signals and the driving electrode layer as a functional layer for transmitting signals are directly attached to the lower part of the cover plate. In this way, there is no need to open molds for the cover plate and the functional film independently, and there is no need to bury the sensor above or below the color filter CF (Colour film) of the display panel. Since it can be made into an ultra-thin single-layer mutual capacitance OGF structure, it can achieve large size, such as 21.5, 23.8, 27, 32 inches, and multi-touch, such as 5-point, 10-point, 20-point, and 40-point touch.

[0040] In a specific embodiment of the present invention, the large-size, multi-touch OGF touch display module includes a cover plate, a functional layer for receiving signals and a functional layer for transmitting signals, wherein the functional layer for receiving signals is made on a conductive surface on the cover plate, and is formed by a lantern-shaped pattern conductive circuit layer of a sensing electrode RX for sensing and receiving touch signals, and the functional layer for transmitting signals is formed by a lantern-shaped pattern conductive circuit layer of a driving electrode TX for transmitting touch signals, and the RX lantern-shaped pattern conductive circuit layer located at the upper part is bonded to the TX lantern-shaped pattern conductive circuit layer located at the lower part, so that the sensing electrode unit of each sensing electrode RX and the driving electrode unit of the driving electrode TX are alternately arranged on the same layer, and the touch display module is formed in a manner that the lantern-shaped pattern conductive circuit layer of the sensing electrode RX, the lantern-shaped pattern conductive circuit layer of the driving electrode TX and the cover plate as a protective layer are integrated.

[0041] In terms of traditional technology, the two-layer ITO electrode is generally formed by combining two layers of transparent conductive materials through optical glue, or by sputtering ITO on the front and back of glass or TFT film. For the mutual capacitance product made of two layers of transparent conductive materials, there is an extra layer of transparent conductive material and optical glue layer. The mutual capacitance single-layer structure of the present invention has obvious advantages.

[0042] Figure 3~Figure 6 A schematic diagram of the RX and TX lantern-shaped pattern conductive circuit layers of a large-size, multi-touch OGF touch display module according to a specific embodiment of the present invention is shown. Figure 3-6As shown, the TX lantern-shaped pattern conductive lines are formed horizontally along the long side direction, and are laid out in rows along the longitudinal direction to fill several rows ( Figure 3 ), the RX lantern-shaped pattern conductive lines are formed longitudinally along the short side direction, and are spread in rows one by one along the horizontal direction to fill several rows ( Figure 5 ), an electrode wire is formed between two adjacent touch electrode units RX and TX (between RX-RX and between TX-TX) for electrical connection of two adjacent touch electrode units (between RX-RX and between TX-TX), and two adjacent touch electrode units are respectively arranged on both sides of the electrode wire. When attached, the RX lantern-shaped pattern conductive wire and the TX lantern-shaped pattern conductive wire are arranged alternately, that is, in Figure 3 A lantern-shaped RX electrode unit is arranged in each white gap around the black lantern-shaped TX electrode unit. Figure 5 A lantern-shaped TX electrode unit is arranged in each white gap around the black lantern-shaped RX electrode unit. In addition, for both the RX electrode and the TX electrode, a conductive silver paste line is used to lead out the electrode connection line on the long side of the electrode layout to connect the corresponding touch electrode unit and the touch chip. Both the RX and TX touch electrode units are lantern-shaped. The lantern-shaped length of the RX touch electrode unit is 5-13 mm and the width is 5-13 mm. The lantern-shaped length of the TX touch electrode unit is 5-13 mm and the width is 5-13 mm.

[0043] like Figure 4 , 6 As shown in 7, the RX touch electrode unit is formed into a lantern-shaped pattern, and the angular portion of the RX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent RX units. Similarly, the TX touch electrode unit is formed into a lantern-shaped pattern, and the angular portion of the TX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent TX units. Each RX channel formed by each RX lantern-shaped pattern conductive circuit layer and each TX channel formed by each TX lantern-shaped pattern conductive circuit layer intersect at their respective neck portions.

[0044] The RX lantern-shaped pattern and the TX lantern-shaped pattern are arranged in a mutually perpendicular manner on the same layer in a laminated state. A single layer of ITO is formed by multiple TX touch electrode units and multiple RX touch electrode units, and the touch electrode units are electrically connected to the corresponding touch chip through corresponding electrode connection lines. Compared with two layers of transparent conductive materials formed by combining optical glue, it can achieve thinness and greatly improve the yield.

[0045] like Figure 7 Shown, shown Figure 3 TX lantern-shaped pattern conductive circuit layer and Figure 5The enlarged schematic diagram of the connection at the intersection of the two when the RX lantern-shaped pattern conductive circuit layers are bonded. For the convenience of description, the enlarged orientation in the enlarged schematic diagram is the same as the enlarged orientation of point A and point B.

[0046] In a preferred embodiment of the present invention, the RX lantern-shaped pattern and the TX lantern-shaped pattern intersect with the lantern-shaped edges of the respective adjacent RX lantern-shaped pattern and TX lantern-shaped pattern after the neck portions of the respective RX channels and TX channels are turned at right angles.

[0047] In another preferred embodiment of the present invention, the distance from the neck portion of the RX lantern-shaped pattern to the lantern-shaped edge of the adjacent TX lantern-shaped pattern is greater than the distance between the adjacent lantern-shaped edges of the RX lantern-shaped pattern and the adjacent TX lantern-shaped pattern at the intersection point.

[0048] In another preferred embodiment of the present invention, the distance from the neck portion of the TX lantern-shaped pattern to the lantern-shaped side of the adjacent RX lantern-shaped pattern is greater than the distance between the adjacent lantern-shaped sides of the TX lantern-shaped pattern and the adjacent RX lantern-shaped pattern at the intersection point.

[0049] like Figure 8 As shown, in one embodiment of the present invention, a method for manufacturing a touch display module is also provided, comprising the following steps: A. Cover ITO coating: coating is performed on the screen printing surface of the cover, that is, indium tin oxide is sputtered onto the cover through a magnetron sputtering process to form a conductive surface; B. Upper layer circuit formation: an RX lantern-shaped pattern conductive circuit layer for sensing and receiving touch signals is made on the conductive surface of the cover plate, forming a cover plate with an RX lantern-shaped pattern conductive circuit layer, integrating the functional layer for receiving signals and the cover plate protective layer; C. ITO glass cutting and upper circuit binding: Bind the flexible circuit board to the RX lantern-shaped pattern conductive circuit layer. Cut the outer contour of the cover layer before binding, and perform CNC edge grinding after cutting.

[0050] D. ITO film raw material processing: Use ITO glass or ITO film as the substrate to make the conductive surface of the TX conductive layer; E. Lower layer circuit printing: Make a TX lantern-shaped pattern conductive circuit layer on the conductive surface of the TX conductive layer; F. Lower layer circuit lamination, cutting and lower layer circuit binding: Laminate the optical glue with the TX conductive layer first, then use a cutting machine to cut out the outline, and bind the flexible circuit board with the TX conductive layer.

[0051] G. Lamination of upper and lower circuits: The cover plate with the RX lantern-shaped pattern conductive circuit layer and the lower TX lantern-shaped pattern conductive circuit layer are laminated by a laminating machine to form a touch display module.

[0052] The TX lantern-shaped pattern conductive circuit layer, which transmits the driving signal of the mutual capacitive touch screen, is laminated with the upper surface of the RX lantern-shaped pattern conductive circuit to form an OGF touch screen with a size of 21.5 inches or more and more than 10 touch points, which can realize multi-touch, such as 10-point, 20-point, 40-point and other multi-touch.

[0053] In this embodiment, the upper and lower circuits are laid as double-layer circuits, so that there will be overlapping cross-layers at the intersection of the upper and lower circuits, and the overlapping cross-layer part can be realized by a three-dimensional cross-bridge structure. The three-dimensional cross-bridge structure is usually completed in a manner similar to bridge overlap in the prior art. However, because in the present invention, the lantern-shaped electrode units with the outline cut out by a cutting machine are arranged in a staggered manner, the traditional bridge overlap structure is not adopted when viewed from above. Therefore, in essence, in the present invention, the upper and lower circuits are basically on the same level, which is completely different from the current so-called single-layer electrode structure which is actually not a true single-layer structure. Moreover, the method of connecting the neck parts of the intersection of the lantern-shaped electrode units at right angles is also simple to manufacture, with a high yield, which can effectively reduce production costs.

[0054] In the present invention, the cover plate as a part of the touch carrier is combined with a conductive layer with touch function to form a new type of OGF touch display module with a size of 21.5 inches or more and more than 10 touch points, namely ONE GLASSFILM, which combines the protection layer and the functional layer into one and has the functions of protection and signal reception.

[0055] The present invention further provides a preferred embodiment of a method for manufacturing a conductive circuit layer, wherein the steps of forming the RX lantern-shaped pattern conductive circuit layer and the TX lantern-shaped pattern conductive circuit layer, i.e., the upper circuit and the lower circuit, sequentially include printing the upper and lower circuits, baking the upper and lower circuits, and photolithography of the upper and lower circuits; in a further preferred embodiment, the printing process is: placing the conductive ink on a patterned screen, and then printing the ink on the conductive surface of the cover plate or the conductive surface of the TX conductive layer through a scraper; in a further preferred embodiment, the baking process is: placing the cover plate or TX conductive layer printed with a pattern into an oven or an IR tunnel oven for baking; the photolithography process is: placing the baked cover plate or TX conductive layer on a photolithography machine platform for etching the circuit to form the circuit required for the touch screen.

[0056] In another preferred embodiment of the present invention, the cover plate ink baking parameters are: IR tunnel oven, baking temperature 150°C, time 15-20min; conductive silver paste baking parameters are: oven, baking temperature 150°C, time 60min.

[0057] In another preferred embodiment of the present invention, the RX lantern-shaped conductive circuit layer and the TX lantern-shaped conductive circuit layer are printed with a conductive silver paste circuit layer. The conductive silver paste can form a high-quality electrode layer to ensure the sensitivity and stability of the touch screen, and can also improve the manufacturing efficiency and yield of the touch screen and reduce the scrap rate.

[0058] In another preferred embodiment of the present invention, there is an insulating ink layer between the RX conductive layer or the TX conductive layer and the silver paste circuit layer, and vias are reserved on the insulating ink side in advance, and then conductive carbon paste is poured into the reserved holes to make the conductive layer and the silver paste conductive layer conductive to form a complete conductive circuit (not shown).

[0059] In another preferred embodiment of the present invention, after the upper and lower layers of circuits are bound, a step of silk screen printing on the cover frame is also included.

[0060] In another preferred embodiment of the present invention, the bottom of the RX lantern-shaped pattern conductive circuit layer and the TX lantern-shaped pattern conductive circuit layer is screen-printed with ink to protect the silver paste circuit.

[0061] In another preferred embodiment of the present invention, the cover plate shown uses glass as raw material. Before step A, the glass raw material is processed in sequence through cutting, CNC, fine carving, tempering, silk screen printing, and baking to make a cover plate frame to make an aesthetically pleasing glass cover plate.

[0062] In another preferred embodiment of the present invention, after the touch layer TP is manufactured, the touch layer AB glue is used to adhere the liquid crystal layer LCD to complete the bonding of the TP layer and the LCD layer.

[0063] The touch display module manufactured by the present invention has been actually tested. After the test, the sample has no appearance or function defects. The material test results are as follows: Test 1

[0064] Test 2

[0065] Test Three

[0066] In summary, the large-size, multi-touch OGF touch display module and its manufacturing method of the present invention are described in detail in combination with the specific implementation methods. Those skilled in the art understand that the description is exemplary. The above embodiments are only for illustrating the technical concept and features of the present invention. The purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Various modifications and changes can be made on this basis. As long as they do not depart from the purpose and spirit of the present invention, all equivalent changes or modifications made according to the spirit of the main technical solution of the present invention should fall within the protection scope of the present invention. The protection scope of the present invention is defined by the attached claims.

Claims

1. An OGF touch display module, characterized in that: The invention comprises a cover plate, a functional layer for receiving signals and a functional layer for transmitting signals, wherein the functional layer for receiving signals is made on a conductive surface on the cover plate and is formed by a lantern-shaped pattern conductive circuit layer of sensing electrodes RX for sensing and receiving touch signals, and the functional layer for transmitting signals is formed by a lantern-shaped pattern conductive circuit layer of driving electrodes TX for transmitting touch signals, and is characterized in that the lantern-shaped pattern conductive circuit layer RX located at the upper part is bonded with the lantern-shaped pattern conductive circuit layer TX located at the lower part, so that the sensing electrode unit of each sensing electrode RX and the driving electrode unit of the driving electrode TX are alternately arranged on the same layer, and the lantern-shaped pattern conductive circuit layer of the sensing electrode RX, the lantern-shaped pattern conductive circuit layer of the driving electrode TX and the cover plate as a protective layer are integrated to form a touch display module.

2. The OGF touch display module according to claim 1, characterized in that: The angular portion of the RX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent RX units, and the angular portion of the TX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent TX units. The RX channels formed by each RX lantern-shaped pattern conductive circuit layer and the TX channels formed by each TX lantern-shaped pattern conductive circuit layer intersect at their respective neck portions.

3. The OGF touch display module according to claim 2, characterized in that: The RX lantern-shaped pattern and the TX lantern-shaped pattern intersect with the lantern-shaped edges of the adjacent RX lantern-shaped pattern and the TX lantern-shaped pattern after the neck portions of the respective RX channels and the TX channels are turned at right angles.

4. The OGF touch display module according to claim 2 or 3, characterized in that: The distance between the neck portion of the RX lantern-shaped pattern and the lantern-shaped edge of the adjacent TX lantern-shaped pattern is greater than the distance between the adjacent lantern-shaped edges of the RX lantern-shaped pattern and the adjacent TX lantern-shaped pattern at the intersection point.

5. The OGF touch display module according to claim 2 or 3, characterized in that: The distance between the neck portion of the TX lantern-shaped pattern and the lantern-shaped edge of the adjacent RX lantern-shaped pattern is greater than the distance between the adjacent lantern-shaped edges of the TX lantern-shaped pattern and the adjacent RX lantern-shaped pattern at the intersection point.

6. A method for manufacturing an OGF touch display module, characterized in that: The following steps are involved: A. Coating is performed on the screen printing surface of the cover plate, and indium tin oxide is sputtered onto the cover plate to form a conductive surface; B. Making a lantern-shaped pattern conductive circuit layer of the sensing electrode RX for sensing and receiving touch signals on the conductive surface of the cover plate, forming a cover plate with the lantern-shaped pattern conductive circuit layer of the sensing electrode RX, and integrating the lantern-shaped pattern conductive circuit layer of the sensing electrode RX and the cover plate; C. Bind the flexible circuit board to the RX lantern-shaped pattern conductive circuit layer of the sensing electrode; D. Use single-sided conductive ITO glass or single-sided conductive ITO film as a substrate, and make the conductive surface of the driving electrode TX on the substrate; E. Make a TX lantern-shaped pattern conductive circuit layer on the conductive surface of the driving electrode TX; F. Firstly bond the optical adhesive to the TX lantern-shaped pattern conductive circuit layer, then cut out the outline of the TX lantern-shaped pattern conductive circuit layer, and bind the flexible circuit board to the TX lantern-shaped pattern conductive circuit layer; G. Lay the cover plate with the RX lantern-shaped conductive circuit layer on the upper part and the TX lantern-shaped conductive circuit layer on the lower part, so that the sensing electrode units of each sensing electrode RX and the driving electrode units of the driving electrode TX are alternately arranged on the same layer to form a touch display module.

7. The method according to claim 6, characterized in that The angular portion of the RX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent RX units, and the angular portion of the TX lantern-shaped pattern forms a neck portion with a flattened tip at the connection between adjacent TX units. The RX channels formed by each RX lantern-shaped pattern conductive circuit layer and the TX channels formed by each TX lantern-shaped pattern conductive circuit layer intersect at their respective neck portions.

8. The method according to claim 6 or 7, characterized in that The RX lantern-shaped pattern and the TX lantern-shaped pattern intersect with the lantern-shaped edges of the adjacent RX lantern-shaped pattern and the TX lantern-shaped pattern after the neck portions of the respective RX channels and the TX channels are turned at right angles.

9. The method according to claim 6 or 7, characterized in that The distance between the neck portion of the RX lantern-shaped pattern and the lantern-shaped edge of the adjacent TX lantern-shaped pattern is greater than the distance between the adjacent lantern-shaped edges of the RX lantern-shaped pattern and the adjacent TX lantern-shaped pattern at the intersection point.

10. The method according to claim 6 or 7, characterized in that The distance between the neck portion of the TX lantern-shaped pattern and the lantern-shaped edge of the adjacent RX lantern-shaped pattern is greater than the distance between the adjacent lantern-shaped edges of the TX lantern-shaped pattern and the adjacent RX lantern-shaped pattern at the intersection point.

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