TWM453906U - Capacitor-type touch device - Google Patents

Description

Capacitive touch device

The present invention relates to a capacitive touch device, and more particularly to a capacitive touch device capable of eliminating the Moire effect.

The so-called "Moire effect" refers to the occurrence of ripples or streaks of interference display on a touch-sensitive display device, which will affect the overall display effect and cause user's viewing troubles.

However, the main reason for the formation of the "Moire effect" is that the capacitive touch panel requires ITO etching on an ITO (Indium Tin Oxide) substrate to form the sensing electrode and the wiring. However, since the ITO film has a certain thickness (about 10 nm to several hundreds of nm), and the sensing electrodes and the wires are mostly performed in a vertical or horizontal direction, when the ITO sensing electrode or the edge of the wire and the pixels of the liquid crystal panel, Or when the black mask of the pixel edge is arranged in parallel or vertically, the edge of the sensing electrode or the wire is easily overlapped with the pixel of the liquid crystal panel to form a shadowing effect, which forms a ripple or a stripe which interferes with the display.

In addition, with the proliferation of capacitive touch screens, the ever-increasing demand for touch accuracy, and the increasing demand for screen resolution, the related technologies that eliminate the Moire effect Development has become an urgent need in the industry.

The main purpose of this creation is to provide a capacitive touch device that can effectively avoid shadowing effects and the formation of the Moire effect, which can greatly improve display quality and touch accuracy.

In order to achieve the above object, a capacitive touch device is provided for being stacked on a liquid crystal panel, and the liquid crystal panel includes a plurality of pixel units, and the plurality of pixel units are vertically arranged along a first direction and along a The second direction is horizontally arranged. The capacitive touch device mainly includes: a transparent insulating substrate, a plurality of touch electrodes, and a plurality of transparent wires. The transparent insulating substrate includes a display area corresponding to the liquid crystal panel; the plurality of touch electrodes are disposed on the transparent insulating substrate; the plurality of transparent wires are disposed on the transparent insulating substrate, and one of the plurality of transparent wires is electrically connected To multiple touch electrodes. However, the main feature of the present invention is that, in the display area, each side of each touch electrode is not parallel to the first direction and the second direction; the plurality of transparent wires are not parallel to the first direction, and The second direction is zigzag.

Accordingly, the present invention is designed such that each side of each touch electrode and each of the transparent wires are designed not to be parallel to the black frame of the pixel edge of each pixel unit of the liquid crystal panel and the arrangement direction of all the pixel units. Therefore, it is possible to effectively avoid the overlap and form a Moire effect or a shadowing effect, which can greatly improve the display quality.

Preferably, in the display area of the present invention, each side of each touch electrode and the plurality of transparent wires have an angle of 45 degrees with the first direction and the second direction, respectively. That is, by the 45 degree angle design, each side of each touch electrode, and each of the transparent wires and the pixel frame black pixel of each pixel unit of the liquid crystal panel, and the arrangement direction of all the pixel units It is completely staggered.

Furthermore, the plurality of touch electrodes of the present invention may include a plurality of driving electrodes and a plurality of sensing electrodes, and the plurality of transparent wires are respectively driven along the plurality One of the electrodes is disposed on one side of the electrode, and each of the sensing electrodes includes a first end portion and a second end portion. The first end portion and the second end portion may have a specific angle, and the specific angle may be less than 180 degrees. Accordingly, by designing the sensing electrode to have a bent shape with a specific angle, each side of each touch electrode and the pixel edge of each pixel unit of the liquid crystal panel and the arrangement of all the pixel units can be arranged. The direction is completely staggered.

In addition, each of the driving electrodes of the present invention may include a sawtooth strip electrode, which may include a plurality of recesses, and the plurality of sensing electrodes are respectively disposed in the plurality of recesses. In addition, the sawtooth strip electrode of the present invention may include a corresponding one of the first side edges and a second side edge, and the plurality of transparent conductive wires are respectively disposed along the first side of the sawtooth strip electrode; the plurality of sensing electrodes are respectively The cloth is disposed in the plurality of recesses of the second side. Moreover, each of the driving electrodes of the present invention may include a plurality of block electrodes, which are respectively disposed between adjacent sensing electrodes and electrically connected to the sawtooth strip electrodes.

Moreover, each of the sensing electrodes of the present invention may be formed by at least one diamond-shaped sensing electrode, and each of the driving electrodes may be formed by connecting a plurality of diamond-shaped driving electrodes in series. Each of the sensing electrodes may be formed by a series of two diamond-shaped sensing electrodes. The plurality of diamond-shaped driving electrodes may include a plurality of first diamond-shaped driving electrodes and a plurality of second diamond-shaped driving electrodes. The area of the first diamond-shaped driving electrodes is smaller than the second diamond-shaped driving electrodes. The area of each of the driving electrodes is formed by a plurality of first rhombic driving electrodes and a plurality of second rhombic driving electrodes being spaced apart from each other.

Please refer to FIG. 1 and FIG. 2 simultaneously. FIG. 1 is an exploded view of the first preferred embodiment of the capacitive touch device of the present invention, and FIG. 2 is a capacitive touch device of the present invention. A front view of the first preferred embodiment is placed. As shown in the figure, the capacitive touch device 1 is used for superimposing on a liquid crystal panel 2, and mainly provides a touch function. However, the liquid crystal panel 2 includes a plurality of pixel units 21, and the plurality of pixel units 21 are vertically arranged along a first direction D1 and laterally along a second direction D2, respectively. In general, the first direction D1 and the second direction D2 are arranged in such a manner as to be orthogonal to each other.

Furthermore, the capacitive touch device 1 mainly includes a transparent insulating substrate 3, a plurality of touch electrodes 4, and a plurality of transparent wires 5. The transparent insulating substrate 3 includes a display area Da corresponding to the liquid crystal panel 2. In other words, the display area Da is mainly the visual range of the user. In addition, the plurality of touch electrodes 4 and the plurality of transparent wires 5 are disposed on the transparent insulating substrate 3, and one end of the plurality of transparent wires 5 is electrically connected to the plurality of touch electrodes 4, respectively. In addition, the plurality of touch electrodes 4 include a plurality of driving electrodes 42 and a plurality of sensing electrodes 41.

However, in the display area Da, each side edge 411, 421 of each touch electrode 4 is not parallel to the first direction D1 and the second direction D2. Further, the plurality of transparent wires 5 are arranged in a zigzag manner so as not to be parallel to the first direction D1 and the second direction D2. In detail, in the present embodiment, each of the sensing electrodes 41 includes a first end portion 413 and a second end portion 414, and the first end portion 413 and the second end portion 414 have a specific angle θ. The specific angle θ is less than 180 degrees, and this embodiment uses 90 degrees.

Moreover, each of the driving electrodes 42 of the present embodiment includes a sawtooth strip electrode 420 including a plurality of recesses 422, and the plurality of sensing electrodes 41 are disposed in the plurality of recesses 422, respectively. In detail, the sawtooth strip electrode 420 of the embodiment includes a corresponding one of the first side 424 and a second side 425. The plurality of transparent wires 5 are respectively disposed along the first side 424 of the sawtooth strip electrode 420, that is, the transparent wires 5 are also in a zigzag line shape. Of course, the transparent wires can also be laid along the second side 425. In addition, each of the driving electrodes 42 includes a plurality of blocking electrodes 423 disposed between the adjacent sensing electrodes 41 and electrically connected to the sawtooth strip electrodes 420. However, the block electrode 423 is mainly used to increase the touch sensing area, thereby effectively improving the accuracy of the touch sensing.

Accordingly, the innovative design of the present embodiment can have each side 411, 421 and the plurality of transparent wires 5 of each touch electrode 4 in the display area Da between the first direction D1 and the second direction D2. The angle of 45 degrees. That is, each of the side edges 411, 421 of each of the touch electrodes 4 and each of the transparent wires 5 and the pixel edge of each pixel unit 21 of the liquid crystal panel 2 may be black-framed by a 45-degree angle design. And the arrangement direction of all the pixel units is completely shifted, thereby effectively avoiding the overlap and forming a Moire effect or a shadowing effect, which can greatly improve the display quality.

In addition, please refer to FIG. 3, which is a front view of a second preferred embodiment of the capacitive touch device of the present invention. The main difference between this embodiment and the foregoing embodiment is that the layout patterns of the plurality of touch electrodes 4 and the plurality of transparent wires 5 on the transparent insulating substrate 3 are different. However, the second embodiment has a common feature, as shown in the first embodiment, that is, each side 411, 421 of each touch electrode 4 in the display area Da, and the plurality of transparent wires 5 and the first direction respectively D1 and the second direction D2 have an angle of 45 degrees.

In the second embodiment, each of the sensing electrodes 41 is formed by at least one diamond-shaped sensing electrode 410, and each of the driving electrodes 42 is formed by serially connecting a plurality of diamond-shaped driving electrodes 426. In detail, in this embodiment, each sensor The electrode 41 is composed of a plurality of diamond-shaped sensing electrodes 410 connected in series, and the plurality of diamond-shaped driving electrodes 426 includes a plurality of first diamond-shaped driving electrodes 427 and a plurality of second diamond-shaped driving electrodes 428, and the area of the first diamond-shaped driving electrodes 427 is smaller than the second The area of the diamond drive electrode 428 is composed of a plurality of first diamond drive electrodes 427 and a plurality of second diamond drive electrodes 428 connected in series with each other.

Accordingly, the second embodiment can also make each side edge 411, 421 of each touch electrode 4 and each transparent wire 5 appear as a black frame with no pixel edge of each pixel unit 21 of the liquid crystal panel 2. And all the pixel units are arranged in parallel. In other words, all the patterned transparent conductive structures on the capacitive touch device 1 do not overlap with the black edges of the pixel edges of the pixel units 21 on the liquid crystal panel 2 or the aligned rows and columns, so that overlapping can be effectively avoided. Forming a Moire effect or a shadowing effect can greatly improve the display quality.

The above-described embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

1‧‧‧Capacitive touch device

2‧‧‧LCD panel

21‧‧‧pixel unit

3‧‧‧Transparent insulating substrate

4‧‧‧Touch electrode

41‧‧‧Induction electrode

410‧‧‧Rhombus-shaped induction electrode

411, 421‧‧‧ side

413‧‧‧ first end

414‧‧‧second end

42‧‧‧ drive electrode

420‧‧‧Sawtooth strip electrode

422‧‧‧ recess

423‧‧‧block electrode

424‧‧‧ first side

425‧‧‧ second side

426‧‧‧Rhombus drive electrodes

427‧‧‧First Diamond Drive Electrode

428‧‧‧Second diamond drive electrode

5‧‧‧Transparent wires

D1‧‧‧ first direction

D2‧‧‧ second direction

Da‧‧‧ display area

1 is an exploded view of a first preferred embodiment of the present invention.

Figure 2 is a front elevational view of the first preferred embodiment of the present invention.

Figure 3 is a front elevational view of a second preferred embodiment of the present invention.

3‧‧‧Transparent insulating substrate

4‧‧‧Touch electrode

41‧‧‧Induction electrode

411, 421‧‧‧ side

413‧‧‧ first end

414‧‧‧second end

42‧‧‧ drive electrode

420‧‧‧Sawtooth strip electrode

422‧‧‧ recess

423‧‧‧block electrode

424‧‧‧ first side

425‧‧‧ second side

5‧‧‧Transparent wires

Da‧‧‧ display area

Θ‧‧‧specific angle

Claims (10)

A capacitive touch device is disposed on a liquid crystal panel, the liquid crystal panel includes a plurality of pixel units, and the plurality of pixel units are vertically arranged along a first direction and laterally along a second direction. The capacitive touch device includes: a transparent insulating substrate, comprising: a display area corresponding to the liquid crystal panel; a plurality of touch electrodes disposed on the transparent insulating substrate; and a plurality of transparent wires, which are arranged One end of each transparent wire is electrically connected to a corresponding touch electrode on the transparent insulating substrate; and each side of each touch electrode is not parallel to the first a direction and the second direction; the plurality of transparent wires are zigzag arranged not parallel to the first direction and the second direction. The capacitive touch device of claim 1, wherein each side of each touch electrode and the plurality of transparent wires are respectively associated with the first direction and the first There is an angle of 45 degrees between the two directions. The capacitive touch device of claim 1, wherein the plurality of touch electrodes comprise a plurality of driving electrodes and a plurality of sensing electrodes, and the plurality of transparent wires are respectively disposed along one side of the plurality of driving electrodes . The capacitive touch device of claim 3, wherein each of the sensing electrodes includes a first end portion and a second end portion, the first There is a specific angle between the one end portion and the second end portion. The capacitive touch device of claim 4, wherein the specific angle is less than 180 degrees. The capacitive touch device of claim 4, wherein each of the driving electrodes is formed in a zigzag strip shape, and includes a plurality of concave portions, and the plurality of sensing electrodes are respectively disposed in the plurality of concave portions. The capacitive touch device of claim 6, wherein the sawtooth strip electrode comprises a corresponding one of a first side edge and a second side edge, and the plurality of transparent conductive wires are respectively along the The first side of the sawtooth strip electrode is disposed; the plurality of sensing electrodes are respectively disposed in the plurality of recesses of the second side. The capacitive touch device of claim 6, wherein each of the driving electrodes comprises a plurality of blocking electrodes, which are respectively disposed between the adjacent sensing electrodes and electrically connected to the sawtooth electrodes. . The capacitive touch device of claim 3, wherein each of the sensing electrodes is formed by at least one diamond-shaped sensing electrode, and each of the driving electrodes is formed by connecting a plurality of diamond-shaped driving electrodes in series. The capacitive touch device of claim 9, wherein each of the sensing electrodes is formed by a series of two diamond-shaped sensing electrodes, the plurality of diamond-shaped driving electrodes including a plurality of first diamond-shaped driving electrodes, and a plurality of second diamonds a driving electrode, the first diamond, the area of the driving electrode is smaller than the area of the second diamond driving electrode, and each of the driving electrodes is serially connected to each other by the plurality of first diamond driving electrodes and the plurality of second diamond driving electrodes Composition.