TWI698777B - Barrier structure of touch panel - Google Patents

Abstract

The present invention relates to a barrier structure of a touch panel, in particular to a barrier structure of a touch panel that can increase the conductivity of upper and lower electrodes. The touch panel includes a conductive glass substrate and a conductive film arranged on the conductive glass substrate The feature of the present invention is that the conductive glass substrate is provided with a plurality of transparent barrier bumps arranged in a matrix in a working area surrounded by the ring-shaped insulating layer on the surface of the transparent conductive layer, and the transparent barrier bumps are connected to the adjacent transparent The distance between the barrier bumps is about 5.3~11.1mm, and the height of the transparent barrier bumps is about 20~60μm, and the diameter of the transparent barrier bumps is about 40~120μm, so that the transparent barrier bumps The density of the transparent barrier bumps is smaller, so the same touch pressure action touches fewer transparent barrier bumps than the conventional one, and its power is also reduced, and the conductive film can withstand less impact from the transparent barrier bumps, and the conductive film touches the conductive film. The area of the glass substrate is also enlarged, so that it can improve the overall touch sensitivity, and can extend the service life of the conductive film, and further increase the service life of the touch panel product.

Description

Touch panel barrier structure

The present invention belongs to the technical field of barrier points of a touch panel, and specifically refers to a barrier structure of a touch panel with a high capacitance value and can increase the number of actions, thereby improving the sensitivity of touch and extending the service life of the product .

Touch panels have been widely used in various electronic products, especially on the surface of display screens. With a display screen with a touch panel, users can directly click and press the screen with their fingers or pen to operate, thereby providing a more convenient and user-friendly operation mode. Common touch panels can be divided into four types: resistive, capacitive, sonic, and optical according to their different principles. At present, the most eye-catching is the capacitive touch panel, and the capacitive touch panel can be divided into surface type capacitive touch panel (single touch) and projected capacitive touch panel according to the different design of its touch area. A touch panel (multi-touch), which can overcome the phenomenon of screen wear caused by finger pressing on the resistive touch panel in the past.

The structure of the existing touch panel is shown in the first figure, which is generally composed of a two-layer structure, including a conductive glass substrate (10) [ITO Glass] and a conductive glass substrate (10) attached to the conductive glass substrate (10). The thin film (20) [ITO Film], in which the upper surface of the conductive glass substrate (10) is coated with a conductive layer (11), and a ring-shaped electrode circuit (15) is printed around it, and the conductive glass substrate (10) ) Corresponds to A ring-shaped insulating layer (30) is printed in the area of the surrounding electrode loop (15); in addition, the lower surface of the conductive film (20) is also plated with a conductive layer (21) and silver wires (25) are printed on the surroundings as inductive conduction. And between the two-layer structure, there are many fine and matrix-arranged transparent blocking bumps (35) (Dot Spacer), so that the conductive glass substrate (10) and the conductive film (20) are kept insulated and separated to ensure When the user does not touch the panel, the two upper and lower structures will not conduct, which may cause misinterpretation. Furthermore, an insulating adhesive layer (40) is provided between the two-layer structure of the conductive glass substrate (10) and the conductive film (20), so that the conductive glass substrate (10) and the conductive film (20) can be pasted into one body to form The structure of a touch panel.

The most important step in the front-end manufacturing process of the touch panel is the production of the transparent blocking bumps (35). Since the transparent barrier bumps (35) are insulating barriers between the conductive layers (21, 11) of the upper electrode and the lower electrode, touch the conductive film (20) above with a finger or other medium, as shown in the second figure It is shown that the current distance between the transparent blocking bumps (35) and the adjacent transparent blocking bumps (35) is about 4mm, and the height of the transparent blocking bumps (35) is about 5-10μm, and the diameter is about 30μm . When the density of the transparent barrier bumps (35) is high, the same touch pressure action will touch multiple transparent barrier bumps (35), so that the conductive film (20) and the conductive glass substrate (10) can be connected For calculating the contact point, a larger touch is required as the driving force. The relatively upper conductive film (20) needs to withstand the impact of the multi-point transparent blocking bump (35), and the transparent blocking bump (35) prevents the touch probability As a result, the area where the conductive film (20) contacts the conductive glass substrate (10) is also reduced, which will affect the overall touch sensitivity, increase its capacitance value, and shorten the service life of the conductive film (20). It also causes shortcomings such as shortened service life of touch panel products, so the uniformity and density are transparent blocking bumps (35) process A big subject.

In view of the short service life and poor sensitivity of existing touch panels, the inventors have conducted in-depth discussions on the aforementioned needs of existing touch panels based on years of experience in research and development and manufacturing in related industries, and actively seek solutions. After continuous hard research and trial work, finally successfully developed a touch panel barrier structure to overcome the inconvenience and trouble caused by the existing people who require greater power and high probability of blocking touch.

Therefore, the main purpose of the present invention is to provide a touch panel barrier structure with high touch sensitivity, by increasing the contact area between the conductive film and the conductive glass substrate during touch, so as to reduce the probability of blocking the touch, thereby increasing the sensitivity of the action .

In addition, another main objective of the present invention is to provide a touch panel barrier structure with long service life. In addition to reducing the operating power due to the increased sensitivity, it can also increase the product by reducing the impact of the conductive film. It can effectively extend the service life of the product.

Accordingly, the present invention mainly implements the aforementioned objectives and effects through the following technical means; it includes a conductive glass substrate and a conductive film for attaching to the conductive glass substrate in a two-layer structure, wherein the conductive glass The opposite surfaces of the substrate and the conductive film respectively have a transparent conductive layer, and the conductive glass substrate is printed with a rectangular ring-shaped electrode circuit on the periphery, and the conductive glass substrate is printed with a rectangular ring-shaped insulation on the area corresponding to the surrounding electrode circuit. The conductive glass substrate and the conductive film are provided with an insulating adhesive layer for pasting; it is characterized in that the conductive glass substrate is provided with a plurality of matrix arrangements in a working area surrounded by the ring-shaped insulating layer on the surface of the transparent conductive layer The transparent barrier bumps, and the transparent The distance between the transparent barrier bump and the adjacent transparent barrier bump is about 5.3~11.1mm, and the height of the transparent barrier bump is about 20~60μm, and the diameter of the transparent barrier bump is about 40~120μm.

Thereby, through the specific realization of the aforementioned technical means of the present invention, the density of the transparent blocking bumps of the touch panel of the present invention is small, and the adjacent area is approximately equal to the area of the finger pad of the human index finger, so the same touch and pressure action The transparent barrier bumps touched are less than those of the conventional type, and the operating force is much smaller than that of the conventional type, and it can effectively reduce the contact resistance when the product is actuated, so the conductive film can bear less transparent barrier bumps. At the same time, the area where the conductive film contacts the conductive glass substrate also becomes larger, so that the overall touch sensitivity can be improved, the service life of the conductive film can be prolonged, and the service life of the touch panel product can be further increased. Therefore, the present invention The touch panel is more effective than the existing ones in terms of "improving sensitivity, reducing power and service life".

In order to enable your reviewer to further understand the composition, features and other purposes of the present invention, the following is a list of some preferred embodiments of the present invention, and detailed descriptions in conjunction with the drawings. At the same time, those familiar with the technical field can follow this Specific implementation of the instructions.

(10): Conductive glass substrate

(11): Conductive layer

(15): Electrode circuit

(20): Conductive film

(21): Conductive layer

(25): Silver wire

(30): Ring insulation layer

(35): Transparent barrier bumps

(40): Adhesive layer

(50): Conductive glass substrate

(51): Transparent conductive layer

(55): Electrode circuit

(60): conductive film

(61): Transparent conductive layer

(70): Ring insulation layer

(75): Transparent barrier bump

(80): Adhesive layer

(90): Contact

(100): Flexible circuit board

(105): Contact

The first figure: a schematic diagram of the conventional touch panel structure; the second figure: the layout diagram of the transparent barrier bumps of the conventional touch panel; the third figure: a preferred embodiment of the barrier structure of the touch panel of the present invention Schematic diagram of the appearance of the structure; the fourth figure: the simple plane layout of the barrier structure of the touch panel of the present invention Figure; Figure 5: is a schematic diagram of a simple side layout of the barrier structure of the touch panel of the present invention; Figure 6: is a graph showing the operating life of the transparent barrier bumps at different distances.

The present invention is a barrier structure of a touch panel. In the specific embodiments and components of the present invention illustrated in the accompanying drawings, all references to front and back, left and right, top and bottom, top and bottom, and horizontal and vertical are included. It is only used for the convenience of description, not to limit the present invention, nor to restrict its components to any position or spatial direction. The drawings and the sizes specified in the specification can be changed according to the design and requirements of the specific embodiments of the present invention without departing from the scope of the patent application of the present invention.

The present invention is a resistive touch panel structure. As shown in the third figure, the touch panel includes a conductive glass substrate (50) [ITO Glass] and a conductive glass substrate (50) for mounting oppositely Two-layer conductive film (60) [ITO Film], wherein the opposite surfaces of the conductive glass substrate (50) and the conductive film (60) have a transparent conductive layer (51, 61), and the conductive glass substrate (50) ) Is printed with a rectangular ring-shaped electrode circuit (55), and the conductive glass substrate (50) is printed with a rectangular ring-shaped insulating layer (70) on the area corresponding to the surrounding electrode circuit (55), and conductive glass The substrate (50) is printed with many fine transparent barrier bumps (75) in the space enclosed by the inner edge of the ring-shaped insulating layer (70), so that the conductive glass substrate (50) and the conductive film (60) are kept insulated and separated to Make sure that when the user does not touch the panel, the two upper and lower structures will not conduct and cause misinterpretation, and a corresponding ring-shaped insulation is provided between the conductive glass substrate (50) and the conductive film (60). The insulating adhesive layer (80) of the edge layer (70) enables the conductive glass substrate (50) and the conductive film (60) to be pasted into a two-layer structure, and the conductive glass substrate (50) has a contact portion (90), The contact portion (90) can be used for electrical connection of a flexible printed circuit board (100) [Flexible Printed Circuit board] with a corresponding contact portion (105) to provide signal transmission between input and output. The structure mentioned above is a resistor The typical composition of the touch panel is not repeated here; As for the characteristic structure of the preferred embodiment of the present invention, as shown in the third, fourth and fifth figures, the conductive glass substrate (50) is surrounded by a ring-shaped insulating layer (70) on the surface of the transparent conductive layer (51). There are a plurality of transparent barrier bumps (75) arranged in a matrix in the working area. These transparent barrier bumps (75) can be formed by screen printing or yellow light process, and the transparent barrier bumps (75) are adjacent to each other. The distance of the transparent blocking bumps (35) is about 5.3~11.1mm, the best spacing distance is 7.7~8.4mm, and the height of the transparent blocking bumps (75) is about 20~60μm, which is the best The height is 25~32μm, and the diameter of the transparent barrier bumps (75) is about 40~120μm, and the best diameter is 70~100μm.

In this way, the group constitutes a touch panel barrier structure that can reduce the working power and increase the sensitivity.

After the foregoing structural description, the conventional touch panel and the touch panel of the present invention are further tested for operation. The test results are shown in Table 1 and Figure 6, in which Table 1 is a transparent blocking bump (75) Comparison table of the action test of different pitches, and the sixth figure shows the action life of the transparent barrier bumps (75) with different pitches (including 4mm of the conventional type, 6mm, 8mm of the present invention, and 12mm beyond the scope of the present invention) , And the seventh figure shows the service life of the touch panel with conventional structure.

After the structure and test description of the present invention, it can be seen that since the density of the transparent blocking bumps (75) of the touch panel of the present invention is relatively small, the adjacent area is approximately equal to the area of the finger pad of the human index finger, so the same touch The transparent blocking bump (75) touched by the pressing action is less than that of the conventional type. From Table 1, no matter what brand and specification of the conductive film (60), the power of the present invention is far more than that of the conventional type. It is small and can effectively reduce the contact resistance when the product is in action. Therefore, the relatively upper conductive film (60) can withstand less impact of the transparent blocking bump (75), and the conductive film (60) contacts the conductive glass substrate (50). The area has also become larger, so that it can improve the overall touch sensitivity, and can extend the service life of the conductive film (60), and further increase the service life of the touch panel product, which can be confirmed by the comparison of the sixth figure; The second series generally have product requirements for touch panels, so it can be known that the present invention does meet the requirements for touch panels, so it effectively increases the added value of the product and enhances its economic benefits.

Table II

In summary, it can be understood that the present invention is a creative creation with excellent creativity. In addition to effectively solving the problems faced by habitants, it also greatly improves the efficiency. There is no identical or similar product creation in the same technical field. Or it can be used publicly, and at the same time it has enhanced efficacy. Therefore, the present invention has met the requirements of "novelty" and "progressiveness" of invention patents, and an application for invention patents is filed according to law.

(50): Conductive glass substrate

(51): Transparent conductive layer

(55): Electrode circuit

(60): conductive film

(61): Transparent conductive layer

(70): Ring insulation layer

(75): Transparent barrier bump

(80): Adhesive layer

(90): Contact

(100): Flexible circuit board

(105): Contact

Claims (4)

A barrier structure for a touch panel, comprising a conductive glass substrate and a conductive film for being attached to the conductive glass substrate in a two-layer structure, wherein the opposite surfaces of the conductive glass substrate and the conductive film respectively have a transparent conductive layer, and A rectangular ring-shaped electrode circuit is printed around the conductive glass substrate, and a rectangular ring-shaped insulating layer is printed on the conductive glass substrate in the area corresponding to the surrounding electrode circuit, and a conductive glass substrate and the conductive film are provided with an adhesive layer between the conductive glass substrate and the conductive film. The insulating adhesive layer; characterized in that: the conductive glass substrate is provided with a plurality of transparent barrier bumps arranged in a matrix in a working area surrounded by the ring-shaped insulating layer on the surface of the transparent conductive layer, and the transparent barrier bumps and phase The distance between adjacent transparent barrier bumps is about 7.7~8.4mm, and the height of the transparent barrier bumps is about 25~32μm, and the diameter of the transparent barrier bumps is about 70~100μm; The touch panel barrier structure that can reduce the working power and increase the sensitivity. As described in the first item of the scope of patent application, the touch panel barrier structure, wherein the conductive glass substrate has a contact portion, and the contact portion can be electrically connected to a flexible circuit board with a corresponding contact portion to provide Signal transmission of input and output. For the touch panel barrier structure described in the first item of the patent application, the transparent barrier bumps can be formed by screen printing. For the touch panel barrier structure described in the first item of the patent application, the transparent barrier bumps can be formed by a yellow light process.

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