TWM510495U - Capacitive touch apparatus - Google Patents

Abstract

A capacitive touch apparatus includes a substrate; a plurality of first electrodes, each first electrode is disposed along a first direction and includes a plurality of branch electrodes to be disposed along a second direction at intervals; a plurality of second electrodes, each second electrode is disposed along the second direction and includes a plurality of cavity zones; and a plurality of dummy blocks disposed inside the plurality of cavity zones without touching; wherein the first direction is perpendicular to the second direction, the plurality of first electrodes and the plurality of second electrodes are disposed on different surfaces of the substrate, and a projection area of the partial first electrodes, a projection area of the partial branch electrodes and a projection area of the partial second electrodes form an overlapping area to process a capacitive touching operation.

Description

Capacitive touch device

The present invention refers to a capacitive touch device, and more particularly to a capacitive touch device that is designed to improve sensitivity by different electrode structures.

The touch electrode can detect a touch action in an active area or a display area, for example, detecting whether a finger presses the touch screen and its corresponding touch position, and some touch devices can also be combined with other touch modules (for example, A stylus) to increase its touch recognition performance. In addition, common touch devices include resistive, capacitive, infrared, or surface acoustic wave types. Among them, capacitive touch devices are the mainstream products of today. The structure of the capacitive touch device often utilizes a transparent conductive material, such as indium tin oxide (ITO), and forms a specific sensing electrode pattern on a substrate, for example, through an X-axis electrode and a Y-axis electrode arranged in an array pattern and between each other. Capacitive coupling is achieved. When an object touches or approaches the touch device, the capacitance value of the touch device at a specific position will change, and the change of the capacitance value can be used to determine whether there is a touch operation and can be positioned. The touch position corresponding to the touch operation.

In addition, the common capacitive touch technology can realize multi-touch function through mutual capacitance sensing operation. However, for a mutual-capacitance electrode structure, the signal-to-noise ratio (SNR) will be proportional to the driving voltage of a transmitting electrode. If the signal-to-noise ratio is to be improved, the driving voltage of the transmitting electrode (10V or more) needs to be increased. Corresponding to a high cost IC process. In addition, the common mutual-capacitive touch technology uses the pitch of the reduced electrode to increase the sensing resolution of the sensing electrode. However, such a method not only requires adding more sensing electrodes, but also increases the response time of the sensing; Furthermore, the farther the touch position of the touch panel from the sensing electrode is, the weaker the capacitive signal is, which will result in poor positioning capability provided by the touch device at these positions, and is used for ultra-thin. This problem is highlighted in the design of the touch panel.

Therefore, the main purpose of the present invention is to provide a capacitive touch device that is designed to improve sensitivity through different electrode structure designs.

The present invention discloses a capacitive touch device including a substrate; a plurality of first electrodes are disposed on the substrate at intervals, wherein each of the first electrodes extends in a first direction and is spaced apart from each other in a second direction a plurality of branch electrodes are disposed on the substrate; a plurality of second electrodes are disposed on the substrate at intervals, wherein each of the second electrodes extends along the second direction and includes a plurality of groove regions; and a plurality of virtual blocks, The plurality of second electrodes are disposed in the plurality of recesses and are not in contact with the plurality of second electrodes for shielding at least one of the noise signals; wherein the first direction and the second direction are perpendicular to each other, and the plurality of first electrodes are The plurality of second electrodes are respectively disposed on different surfaces of the substrate, and a portion of the projected area of the plurality of first electrodes, a portion of the projected area of the plurality of branch electrodes, and a portion of the projected area of the plurality of second electrodes are formed. An overlapping projection area is used to perform a mutual capacitive touch operation.

1‧‧‧Capacitive touch device

R1~R3‧‧‧first electrode

R1_B1~R1_B7, R2_B1~R2_B7, R3_B1~R3_B7‧‧‧ branch electrodes

T1~T3‧‧‧second electrode

T1_H1~T1_H8‧‧‧ Groove area

H1, H2‧‧‧ first groove area

DB‧‧‧Virtual Block

SB‧‧‧ substrate

FIG. 1 is a partial schematic view of a capacitive touch device according to the present invention.

Figure 2 is a partial schematic view of a plurality of first electrodes created on a first plane.

FIG. 3 is a partial schematic view showing a plurality of second electrodes and a plurality of virtual blocks on the second plane.

Certain terms are used throughout the description and following claims to refer to particular elements. It should be understood by those of ordinary skill in the art that manufacturers may refer to the same elements by different nouns. The scope of this specification and the subsequent patent application do not use the difference of the names as the means for distinguishing the elements, but the differences in the functions of the elements as the basis for the distinction. The term "including" as used throughout the specification and subsequent claims is an open term and should be interpreted as "including but not limited to". In addition, the term "coupled" is used herein to include any direct and indirect electrical connection. Therefore, if a first device is coupled to a second device, it means that the first device can be directly connected to the second device or indirectly connected to the second device through other devices or connection means.

Please refer to FIG. 1 , which is a partial schematic view of a capacitive touch device 1 . As shown in FIG. 1 , the capacitive touch device 1 of the present embodiment only schematically represents a representative component in a partial structure, that is, the capacitive touch device 1 includes a substrate SB, first electrodes R1 R R3, and The two electrodes T1~T3 and the plurality of virtual blocks DB, wherein the first electrode is a sensing electrode and the second electrode is a transmitting electrode, and the number of the two is only an exemplary description here, and further, through a plurality of sensing The matrix structure of the electrode and the plurality of emitter electrodes is arranged. The capacitive touch device 1 can perform a mutual capacitive touch operation according to a change in the capacitance value, so as to correspondingly determine and position a touch object that is close to and pressed. Touch device 1. Of course, the capacitive touch device 1 in this embodiment may further include other functional components, such as a control module, a power driver, a temporary storage module, or a corresponding transmission line. These functional elements should be well-known in the art and are not the focus of the creative discussion, and will not be described here. In other embodiments, the capacitive touch device 1 can be integrated with another display device or an electronic device to further include a flexible circuit board, a light guide plate, a backlight module, a display panel, or other digits. Control modules, etc., are not intended to limit the scope of this creation.

In detail, the substrate SB in this embodiment is disposed on an XY plane, and includes a first direction parallel to the Y axis and a second direction parallel to the X axis, wherein the first direction and the second direction are perpendicular to each other, and The substrate SB includes a first plane and a second plane, and the first plane and the second plane are both parallel to the XY plane. Accordingly, the sensing electrodes, such as the first electrodes R1 R R3, in the embodiment may be disposed on the first plane of the substrate SB at intervals, each of the first electrodes extending in the first direction and spaced apart in the second direction. A plurality of branch electrodes are provided. For example, the first electrode R1 includes branch electrodes R1_B1 R R1_B7, the first electrode R2 includes branch electrodes R2_B1 R R2_B7, and the third electrode R3 includes branch electrodes R3_B1 R R3_B7, wherein the number 7 can also be adaptively It is modified to be any other positive integer, that is, the distance between each two branch electrodes in this embodiment can be adjusted or changed adaptively, and is not used to limit the scope of the present creation.

Please refer to FIG. 2, which is a partial schematic view of a plurality of first electrodes on the first plane. As shown in FIG. 2, each of the first electrodes in the embodiment is a body and forms a long column block, and the plurality of branch electrodes on each of the first electrodes are an attached body and form a short column region. The block, and each of the long column blocks and each of the short column blocks each have a width of 0.3 millimeters (mm). In addition, the plurality of branch electrodes included in each of the first electrodes in the embodiment include different horizontal lengths, that is, the horizontal lengths of the adjacent two branch electrodes included in the plurality of first electrodes are different, so that In this embodiment, the horizontal lengths of the branch electrodes can be adjusted to appropriately adjust the sensitivity of the capacitive touch device 1 for touch operations.

Please refer to FIG. 3, which is a partial schematic view of a plurality of second electrodes and a plurality of virtual blocks created on the second plane. As shown in FIG. 1 and FIG. 3, the emitter electrodes of the present embodiment, such as the second electrodes T1 T T3, may be disposed at intervals on the second plane of the substrate SB, and each of the second electrodes extends in the second direction. And including a plurality of groove regions, for example, the second electrode T1 includes the groove regions T1_H1~T1_H8, and each of the two groove regions is also separated by a separation distance, such as the groove region T1_H1 and the groove region T1_H2 are arranged up and down Forming the first column and the second column, at the same time, the groove region The region T1_H3, the groove region T1_H5, and the groove region T1_H7 are all spaced apart from each other in the first column, and the groove region T1_H4, the groove region T1_H6, and the groove region T1_H8 are also disposed at intervals in the second column, according to which the present embodiment In the example, the first column and the second column of the groove region are arranged in the upper and lower mirrors, and the groove regions of the different columns are not in contact with each other, and the different groove regions in the same column are not in contact with each other, so as to facilitate the symmetry generation. The two electrodes T1~T3, of course, the arrangement of the second electrodes T1~T3 can also form an asymmetric structure, which is not intended to limit the scope of the present creation.

In addition, the plurality of virtual blocks DB in the embodiment may be disposed in a plurality of groove regions of the second electrodes T1 T T3, and the plurality of virtual blocks DB do not contact the plurality of second electrodes. In other words, the plurality of virtual blocks DB in the embodiment are further separated from the adjacent plurality of groove regions by another distance, so that the plurality of virtual blocks DB can be electrically isolated from the second electrodes T1 to T3. In this embodiment, the second electrode T1~T3 and the plurality of virtual blocks DB can be used to shield at least one noise signal from other functional components without adding an isolation layer to increase the capacitive touch device. 1 one physical thickness. Preferably, in this embodiment, the plurality of groove regions adjacent to the plurality of groove regions are separated by a distance of 0.3 mm, and one or more virtual blocks may be disposed in each groove region, and each of the two virtual blocks There is another separation distance between the blocks of 0.3 mm.

In this case, the plurality of first electrodes (such as the first electrodes R1 to R3) and the plurality of second electrodes (such as the second electrodes T1 to T3) of the capacitive touch device 1 are respectively disposed on the substrate. a projected area of a plurality of first electrodes (such as first electrodes R1 to R3), a projected area of a plurality of branch electrodes (such as branch electrodes R1_B2, R2_B2, and R3_B2) and a plurality of second electrodes on different surfaces of SB The projected areas of the second electrodes T1 T T3 form an overlapping projected area for performing a mutual capacitive touch operation. In other words, the projected area of one of every three branch electrodes (such as the branch electrode R1_B2) in this embodiment overlaps the projected area of the plurality of second electrodes, and the other two (eg, branch electrodes R1_B1, R1_B3) The projected area is overlapped by one of the first recessed regions H1, H2 included between two adjacent second electrodes (eg, the second electrodes T1 T T2) The projection area is such that the projection area of the plurality of first electrodes, the plurality of branch electrodes and the plurality of second electrodes overlap each other to be greatly reduced, so as to appropriately reduce the mutual capacitance value between the sensing electrode and the emitter electrode. When a touch object is pressed against the capacitive touch device 1 , the touch-sensitive value of the capacitive touch device 1 can be greatly increased.

In addition, in this embodiment, in order to enhance the mutual capacitive touch operation between the sensing electrode and the transmitting electrode, the projected area is smaller than the branching electrodes of other projected areas that cannot overlap the projected area of the plurality of second electrodes. The branch electrodes which can overlap the projection areas of the plurality of second electrodes will have a longer horizontal length, that is, the horizontal length of the branch electrodes R1_B2 is longer than the horizontal length of the branch electrodes R1_B1 and R1_B3, and the design can also appropriately increase the capacitive touch. The touch operation sensitivity of the device 1 and the difference in length between the branch electrodes are not intended to limit the scope of the present creation.

Referring to FIG. 1 and FIG. 3 again, in the embodiment, two adjacent emitter electrodes include first recess regions H1 and H2, and a projected area of the first recess regions H1 and H2 overlaps the branch electrode R1_B1. The projected area of R1_B3 is such that the projected overlap area between the branch electrodes R1_B1 and R1_B3 and the emitter electrodes (eg, the second electrodes T1 to T3) can be correspondingly reduced. In addition, the plurality of groove regions of each second electrode (eg, the second electrode T1) further includes a second groove region (ie, the groove regions T1_H1, T1_H2, T1_H7, T1_H8) and the third groove region (ie, the concave portion a slot area T1_H3, T1_H4, T1_H5, T1_H6), wherein each second groove area is provided with only a single virtual block DB, and each third groove area is provided with two virtual block DBs, so that the first The plurality of virtual blocks DB in the two groove regions and the third groove region may overlap the area of the majority of the second groove regions and the area of the third groove region, and the virtual blocks DB do not contact the second portion a groove area and a third groove area. In other words, the virtual block DB in this embodiment fills the area corresponding to each groove area as much as possible, so that when a user operates the capacitive touch device 1, the light is not transmitted by the groove regions. To interfere with or affect its related operations. Of course, the number and arrangement of the groove regions exemplified in this embodiment Or the number and size of the virtual blocks are merely exemplary. Those skilled in the art may also modify the number and arrangement of the groove areas and the virtual blocks instead of limiting the scope of the creation. .

In this case, the plurality of first electrodes, the plurality of branch electrodes, and the plurality of second electrodes that can overlap each other through the projected areas, when the touch object presses the capacitive touch device 1, the embodiment may be The sensitivity of the touch operation of the capacitive touch device 1 in the present embodiment is greatly improved, and the mutual touch operation is performed by using the mutual capacitance value of the sensing electrode and the transmitting electrode in the overlapping projection area. The capacitive touch device 1 of the present embodiment can also perform a pre-judgment operation in advance, that is, the touch operation sensitivity of the capacitive touch device 1 has been used to detect whether an object is approaching the capacitive touch device 1. If an object is approaching the capacitive touch device 1, the pre-judging operation can also activate the mutual capacitive touch operation of the capacitive touch device 1 to increase the reaction time of the capacitive touch device 1 and improve the related positioning operation. The accuracy of this is also within the scope of this creation.

Furthermore, since the width of the first electrode and the branch electrode thereof is only 0.3 mm in this embodiment, the sensor pitch corresponding to the two adjacent first electrodes can be adaptively adjusted, for example, adjusted to 4.0 mm. ~4.3mm, the capacitive touch device 1 can be mutually capacitive touch operation with a touch module (for example, a stylus) having a tip width equal to 1.0mm, and when adjusted to 4.0mm or less The capacitive touch device 1 can perform a mutual capacitive touch operation with a touch module having a tip width of less than 1.0 mm, so that the application range of the capacitive touch device 1 can also be adjusted by the adjustment of the sensing pitch. Change, this also belongs to the scope of this creation.

Compared with the prior art, the capacitive touch of the embodiment can be made by modifying the arrangement manner and the number of uses between the first electrode and the branch electrode, the second electrode and the groove region thereof, and the dummy block. The sensitivity of the touch operation of the control device is greatly improved. At the same time, the isolation operation of the emitter electrode and the virtual block can also block the noise signals from other modules to reduce the corresponding noise. The physical thickness of the capacitive touch device. In addition, since the width of the sensing electrode and the branch electrode can be reduced to 0.3 mm, and the sensing interval between each of the two sensing electrodes is adjusted to be 4.0 mm or less, the capacitive touch device of the embodiment can be used with a tip width smaller than 1.0mm stylus to increase the sensing effect and ease of operation of the user's touch operation.

In summary, the present invention provides a capacitive touch device, which reduces the overlapping projected area of the sensing electrode and the transmitting electrode at different layers, and the sensing electrode also includes a branch electrode with adjustable length and quantity. Therefore, the touch operation sensitivity of the capacitive touch device can be greatly improved, and the improved touch operation sensitivity can also be used to perform a detection operation in which a touch object is approaching; further, the concave portion of the emitter electrode in this embodiment The slot area is also provided with a virtual block of adjustable number and size, so that the anti-noise capability of the capacitive touch device can be correspondingly improved, and the visual effect of the user is not affected, thereby greatly improving the capacitive touch device. Touch operation and product application.

The above descriptions are only preferred embodiments of the present invention, and all changes and modifications made by the scope of the patent application of the present invention should be covered by the present invention.

1‧‧‧Capacitive touch device

R1~R3‧‧‧first electrode

R1_B1~R1_B7, R2_B1~R2_B7, R3_B1~R3_B7‧‧‧ branch electrodes

T1~T3‧‧‧second electrode

T1_H1~T1_H8‧‧‧ Groove area

H1, H2‧‧‧ first groove area

DB‧‧‧Virtual Block

SB‧‧‧ substrate

Claims (8)

A capacitive touch device includes: a substrate; a plurality of first electrodes are disposed on the substrate at intervals, wherein each of the first electrodes extends along a first direction and is spaced apart from each other in a second direction a plurality of second electrodes disposed at intervals on the substrate, wherein each of the second electrodes extends along the second direction and includes a plurality of groove regions; and a plurality of dummy blocks are disposed on And the plurality of second electrodes are not in contact with the plurality of second electrodes for shielding at least one of the noise signals; wherein the first direction and the second direction are perpendicular to each other, the plurality of first electrodes and the plurality The second electrodes are respectively disposed on different surfaces of the substrate, and a portion of the projected area of the plurality of first electrodes, a portion of the projected area of the plurality of branch electrodes, and a portion of the projected area of the plurality of second electrodes form an intersection Stack the projected area for a mutual capacitive touch operation. The capacitive touch device of claim 1, wherein the overlapping projected area further utilizes a mutual capacitance value change to detect whether an object is in proximity to the capacitive touch device. The capacitive touch device of claim 1, wherein the plurality of first electrodes form a long column block and the plurality of branch electrodes form a short column block, and each long column block and each A short column block includes a width of 0.3 mm. The capacitive touch device of claim 1, wherein the plurality of branch electrodes spaced apart in the second direction comprise different ones of horizontal lengths. The capacitive touch device of claim 1, wherein the projection of one of each of the three branch electrodes The area overlaps the projected area of the plurality of second electrodes, and the projected areas of the other two overlap the projected area of one of the first groove areas included between the adjacent two second electrodes. The capacitive touch device of claim 1, wherein the plurality of virtual blocks are adjacent to the plurality of groove regions by a distance of 0.3 mm, and each of the groove regions is further provided with a plurality of virtual regions. Block, and there is another separation distance between each two virtual blocks of 0.3 mm. The capacitive touch device of claim 1, wherein a first groove region is included between two adjacent second electrodes, and the plurality of groove regions of each second electrode includes a plurality of second regions. a recessed area and a plurality of third recessed areas, wherein a projected area of the plurality of first recessed areas overlaps a projected area of the plurality of branching electrodes, and each of the second recessed areas is provided with a single virtual block, Each of the third groove regions is provided with two virtual blocks, and the plurality of second groove regions are disposed to overlap the plurality of virtual blocks in the plurality of third groove regions. The area of the second recessed area and the area of the plurality of third recessed areas do not contact the plurality of second recessed areas and the plurality of third recessed areas. The capacitive touch device of claim 1 further performs the mutual capacitive touch operation with a touch module having a tip width of less than 1.0 mm.