TWI585642B - Touch display device - Google Patents

Description

Touch display device

The present invention relates to a touch display device, and more particularly to a capacitive touch display device.

The touch display device is a transparent screen that directly inputs an input command by means of a finger or a stylus. Since an additional keyboard and an input device such as a mouse are not required, the use of the touch display device can greatly reduce the weight and volume of the electronic device, and the application of the touch display device to the portable product meets the requirements of lightness and shortness. At present, touch display devices have been widely used in portable electronic products such as smart phones, smart watches or tablet computers. In general, the working principle of the known touch display device can be roughly classified into a resistive type, a capacitive type, an optical type, and the like. However, in order to meet the needs of more diverse use, it is urgent to develop touch display devices of different structures in the future.

Therefore, it is an object of the present invention to provide a touch display device with a plurality of conductive members and a plurality of conductive pads as an insulating substrate and an inductive electrode between the circuit substrates.

Therefore, a touch display device of the present invention comprises an insulating substrate, a circuit substrate and at least one conductive unit. The circuit board is fixed And disposed under the insulating substrate and spaced apart from the insulating substrate by a predetermined distance. Each conductive unit is disposed between the insulating substrate and the circuit substrate, and each of the conductive units includes a conductive member and a conductive buffer. The conductive member of each conductive unit has a lower end portion electrically connected to the circuit substrate and an upper end portion opposite to the lower end portion. The conductive buffer of each conductive unit is sandwiched between the insulating substrate and the upper end of the conductive member.

In some embodiments, the conductive member of each conductive unit further has an intermediate rod portion interconnecting the upper end portion and the lower end portion, the upper end portion having a circular plate shape and contacting the conductive buffer pad and having a larger than the The outer diameter of the outer diameter of the intermediate rod portion is formed on the circuit substrate and has an outer diameter smaller than an outer diameter of the intermediate rod portion.

In some embodiments, each of the conductive units further includes a conductive double-sided tape adhered between the top surface of the upper end portion of the conductive member and the bottom surface of the conductive cushion.

In some embodiments, the outer diameter of the upper end portion of the conductive member of each conductive unit ranges from 0.8 to 1.5 cm.

In some embodiments, at least one connecting unit is disposed and disposed between the insulating substrate and the circuit substrate to maintain the predetermined distance between the insulating substrate and the circuit substrate.

In some embodiments, the connecting unit includes a connecting member having a plate portion at a top end thereof and a tapered portion extending downward from the plate portion and having a reduced width.

In some embodiments, the connecting unit further includes a double-sided tape adhered to the top surface of the board portion and the bottom surface of the insulating substrate.

In some embodiments, the connecting unit further includes a fixing member fixedly disposed through the circuit substrate and the bottom end of the tapered portion of the connecting member.

The effect of the invention is that a conductive buffer pad and a conductive member are used as the sensing electrodes between the insulating substrate and the circuit substrate, and the conductive buffer pad is disposed between the insulating substrate and the conductive member, so that When the touch display device is assembled, the insulating substrate can be prevented from being scratched by the conductive member.

100‧‧‧Touch display device

1‧‧‧Insert substrate

2‧‧‧ circuit board

3‧‧‧Conducting unit

31‧‧‧Electrical parts

311‧‧‧Upper end

312‧‧‧Intermediate pole

313‧‧‧Bottom

32‧‧‧Electrical cushion

33‧‧‧ Conductive double-sided tape

4‧‧‧ Connection unit

41‧‧‧Connecting parts

411‧‧‧ Board

412‧‧‧ Cone

42‧‧‧Double-sided tape

43‧‧‧Fixed parts

D‧‧‧Predetermined distance

T‧‧‧ natural thickness

The other features and advantages of the present invention will be apparent from the embodiments of the present invention. FIG. 1 is a schematic view showing an embodiment of the touch display device of the present invention; FIG. 2 is a perspective view illustrating A conductive member of the embodiment; FIG. 3 is a schematic view showing a conductive buffer of the embodiment in an uncompressed natural state; and FIG. 4 is a schematic view showing the conductive buffer clip of the embodiment. A state between an insulating substrate and a conductive member.

Referring to FIG. 1 , an embodiment of a touch display device 100 of the present invention includes an insulating substrate 1 , a circuit substrate 2 , a plurality of conductive units 3 , and a plurality of connecting units 4 . Since the structure of each of the conductive units 3 is the same and the structure of each of the connecting units 4 is the same, only one conductive unit 3 and the connecting unit 4 are respectively shown in FIG. In this embodiment, the insulating substrate 1 may be glass or It is made of acrylic and other materials, and a layer of paint is printed on the bottom surface to make it translucent, but not limited to this. In addition, the insulating substrate 1 may also have a curvature, and is not limited to the plane disclosed in the drawings.

The circuit board 2 is fixedly disposed under the insulating substrate 1 by each connecting unit 4 and spaced apart from the insulating substrate 1 by a predetermined distance D. Each of the conductive units 3 is disposed between the insulating substrate 1 and the circuit substrate 2 and electrically connected to the circuit substrate 2. Each conductive unit 3 serves as a sensing electrode when the user touches by a finger or a stylus. When the insulating substrate 1 is touched, a corresponding induced current is generated to flow to the circuit substrate 2. In this embodiment, the circuit board 2 is a single-sided PCB, but is not limited thereto.

Please refer to FIG. 1 and FIG. 2 . Specifically, each conductive unit 3 includes a conductive member 31 , a conductive buffer pad 32 , and a conductive double-sided tape 33 . The conductive member 31 of each conductive unit 3 has a lower end portion 313 electrically connected to the circuit substrate 2, an upper end portion 311 opposite to the lower end portion 313, and an intermediate rod interconnecting the upper end portion 311 and the lower end portion 313 Part 312. The upper end portion 311 has a circular plate shape and contacts the conductive cushion 32. The upper end portion 311 has an outer diameter larger than the outer diameter of the intermediate rod portion 312. Since the width of the finger is about 1 cm, in the present embodiment, the outer diameter of the upper end portion 311 of each conductive unit 3 ranges from 0.8 to 1.5 cm to match the width of the finger, but not limited thereto. . The lower end portion 313 is disposed on the circuit board 2 and has an outer diameter smaller than the outer diameter of the intermediate rod portion 312. In this embodiment, since the circuit board 2 is a single panel, the lower end portion is 312 is inserted through the circuit substrate 2 and the bottom surface of the circuit substrate 2 The electrical connection of the wires. The supplementary book explains that if different types of circuit boards 2 such as double-sided PCBs and multi-layer boards are used, the connection manner between the lower end portion 312 and the circuit board 2 can be adjusted accordingly. The above content is limited.

Referring to FIG. 3 and FIG. 4, the conductive buffer pad 32 of each conductive unit 3 is sandwiched between the insulating substrate 1 and the upper end portion 311 of the conductive member 31, and the conductive double-sided portion of each conductive unit 3 The adhesive tape 33 is adhered between the top surface of the upper end portion 311 of the conductive member 31 and the bottom surface of the conductive buffer pad 32, so that the conductive buffer pad 32 and the conductive member 31 of each conductive unit 3 are bonded and fixed to each other. Electrically conductive state. In this embodiment, each of the conductive cushions 32 has a predetermined natural thickness T when it is in a natural state that is not affected by other external forces, and the setting of the size of the natural thickness T matches the magnitude of the predetermined distance D. When the conductive pad 32 is sandwiched between the insulating substrate 1 and the upper end portion 311 of the conductive member 31, the conductive pad 32 is compressed and completely covered at the upper end of the conductive member 31. All the top surfaces of the 311 allow the upper end portion 311 of the conductive member 3 to maintain good contact with the conductive cushion 32. Moreover, during the assembly process, the conductive buffer pad 32 is interposed between the insulating substrate 1 and the conductive member 31, so that the insulating substrate 1 can be prevented from being scratched by the conductive member 31. In addition, in the present embodiment, the conductive pad 32 of each conductive unit 3 may be a material such as a conductive foam, but is not limited thereto.

Each connecting unit 4 is disposed between the insulating substrate 1 and the circuit substrate 2 for maintaining the predetermined distance D between the insulating substrate 1 and the circuit substrate 2. Each connecting unit 4 includes a connecting member 41, A double-sided tape 42 and a fixing member 43. The connecting member 41 of each connecting unit 4 has a plate portion 411 at its top end and a tapered portion 412 extending downward from the plate portion 411 and having a reduced width. The double-sided tape 42 of each of the connecting units 4 is adhered between the top surface of the plate portion 411 and the bottom surface of the insulating substrate 1. The fixing member 43 of each connecting unit 4 is fixedly disposed through the circuit board 2 and the bottom end of the tapered portion 412 of the connecting member 41. In this embodiment, the fixing member 43 is a screw, but is not limited thereto. In addition, although the connecting member 41 and the circuit board 2 are locked by the fixing member 43 in the present embodiment, the two may be combined by different methods such as clamping and adhesion, and are not limited to the above.

In summary, when the conductive cushion 32 is sandwiched between the insulating substrate 1 and the upper end portion 311 of the conductive member 31, the conductive cushion 32 is compressed. The upper end portion 311 of the conductive member 3 has good contact with the conductive buffer pad 32. Further, during the assembly process, the conductive buffer pad 32 separates the insulating substrate 1 from the conductive member 31, thereby avoiding the The insulating substrate 1 is scratched by the conductive member 31. Therefore, the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the simple equivalent changes and modifications made by the scope of the patent application and the patent specification of the present invention are It is still within the scope of the invention patent.

100‧‧‧Touch display device

1‧‧‧Insert substrate

2‧‧‧ circuit board

3‧‧‧Conducting unit

31‧‧‧Electrical parts

311‧‧‧Upper end

312‧‧‧Intermediate pole

313‧‧‧Bottom

32‧‧‧Electrical cushion

33‧‧‧ Conductive double-sided tape

4‧‧‧ Connection unit

41‧‧‧Connecting parts

411‧‧‧ Board

412‧‧‧ Cone

42‧‧‧Double-sided tape

43‧‧‧Fixed parts

D‧‧‧Predetermined distance

Claims (8)

A touch display device includes: an insulating substrate; a circuit substrate fixedly disposed under the insulating substrate and spaced apart from the insulating substrate by a predetermined distance; and at least one conductive unit disposed on the insulating substrate and the circuit substrate Each conductive unit includes a conductive member having a lower end portion electrically connected to the circuit substrate and an upper end portion opposite to the lower end portion, and a conductive buffer pad sandwiched between the insulating substrate and the conductive member Between the upper ends. The touch display device of claim 1, wherein the conductive member of each conductive unit further has an intermediate rod portion interconnecting the upper end portion and the lower end portion, the upper end portion being in a disc shape and contacting the conductive portion. The cushion has an outer diameter larger than an outer diameter of the intermediate rod portion, and the lower end portion is disposed on the circuit substrate and has an outer diameter smaller than an outer diameter of the intermediate rod portion. The touch display device of claim 2, wherein the outer diameter of the upper end portion of the conductive member of each conductive unit ranges from 0.8 to 1.5 cm. The touch display device of claim 2, wherein each of the conductive units further comprises a conductive double-sided tape adhered between the top surface of the upper end portion of the conductive member and the bottom surface of the conductive cushion. The touch display device of claim 1, further comprising at least one connecting unit disposed between the insulating substrate and the circuit substrate and configured to The predetermined distance between the insulating substrate and the circuit substrate is maintained. The touch display device of claim 5, wherein each of the connecting units comprises a connecting member having a plate portion at a top end thereof and a tapered portion extending downward from the plate portion and having a reduced width. The touch display device of claim 6, wherein each of the connecting units further comprises a double-sided tape adhered between the top surface of the plate portion and the bottom surface of the insulating substrate. The touch display device of claim 7, wherein each of the connecting units further comprises a fixing member fixedly disposed on the circuit substrate and a bottom end of the tapered portion of the connecting member.