TWM451600U - Touch electrode device - Google Patents

Abstract

A touch electrode device includes first electrode lines and second electrode lines formed on a transparent substrate. An insulating block is disposed at a junction between a first conductive connecting portion of the first electrode line and a second conductive connecting portion of the second electrode line. At least one insulating line is extended from the insulating block and disposed along the first electrode line.

Description

Touch electrode device

The present invention relates to a touch panel, and more particularly to a touch electrode device having an insulating block and an insulating strip.

The touch display is an input/output device formed by combining sensing technology and display technology, and is commonly used in electronic devices, such as portable and handheld electronic devices.

A capacitive touch panel is a commonly used touch panel that utilizes a capacitive coupling effect to detect a touch position. When the finger touches the surface of the capacitive touch panel, the capacitance of the corresponding position is changed, and the touch position is detected.

The first figure shows a top view of a conventional touch panel 200, which is disclosed in U.S. Patent No. 6,188,391. The conventional touch panel 200 is composed of a vertical electrode array 21 and a horizontal electrode array 22, and an elongated insulating block 23 is used to electrically insulate the vertical electrode array 21 and the horizontal electrode array 22. However, the width of the elongated insulating block 23 is too wide, so that the transmittance of the touch panel is lowered. In addition, when the user views the touch panel 200 from above, a visual trace phenomenon (or optical visibility) is generated, thereby affecting the appearance.

Therefore, there is a need to provide a novel touch electrode device for improving the disadvantages of touching a conventional touch panel.

In view of the above, one of the purposes of the present embodiment is to provide a touch electrode device for increasing the transmittance of the touch panel and avoiding visibility problems.

According to the present embodiment, the touch electrode device includes a transparent substrate, a plurality of first electrode columns, a plurality of second electrode columns, a plurality of insulating blocks, and a plurality of insulating strips. The first electrode arrays are formed on the transparent substrate, the first electrode array includes a plurality of first electrodes, and the first conductive connection portions are located between adjacent first electrodes of the same first electrode column. The second electrode array is formed on the transparent substrate, the second electrode column includes a plurality of second electrodes, and the second conductive connection portion is located between adjacent second electrodes of the same second electrode column. The insulating blocks are respectively located at the junction of the first conductive connection portion and the second conductive connection portion. The insulating block is provided with at least one insulating strip extending along the direction of the first electrode column.

The second figure shows a partial top view of the touch electrode device 300 of the present embodiment. In this embodiment, the touch electrode device 300 mainly includes a plurality of first electrode columns 31 and a plurality of second electrode columns 32 formed on the transparent substrate 30. The first electrode columns 31 are substantially parallel to each other, and the second electrode columns 32 are substantially parallel to each other. The first electrode array 31 and the second electrode array 32 may be substantially orthogonal, but are not limited thereto. The transparent substrate 30 may be made of an insulating material such as glass, polycarbonate (Polycarbonate, PC), polyethylene terephthalate (PET), polyethylene (Polyethylen, PE), and polyvinyl chloride (Polyvinyl). Chloride, PVC), Polypropylene (PP), Polystyrene (PS), Polymethyl methacrylate (PMMA) or Cyclic olefin copolymer (COC).

In an embodiment, the first electrode array 31 and the second electrode array 32 may be light-transmissive structures formed by a non-transparent conductive material. The non-transparent conductive material may be a plurality of metal nanowires, such as nano silver wires or nano copper wires; or a plurality of metal nanonets, such as a nano silver mesh or a nano copper mesh. The inner diameter of the nanowire or metal mesh is in the nanometer grade (ie, between several nanometers and hundreds of nanometers) and can be fixed by a plastic material such as a resin. Since the nanowire/mesh is very thin and can be observed by a non-human eye, the first electrode array 31 and the second electrode array 32 composed of a nanowire/web are excellent in light transmittance. The first electrode array 31 and the second electrode array 32 may further comprise a photosensitive material (for example, acryl), and a desired electrode pattern can be formed by an exposure and development process. [00010] In another embodiment, the first electrode array 31 and the second electrode array 32 may be a light transmissive structure formed of a transparent conductive material. The transparent conductive material may be indium tin oxide (ITO), indium zinc oxide (IZO), aluminum-doped ZnO (AZO) or antimony tin oxide (ATO). The first electrode array 31 is composed of a plurality of first electrodes 310, and has a first conductive connection portion 311 between the adjacent first electrodes 310 of the same first electrode array 31 for electrically connecting adjacent ones. An electrode 310. The second electrode array 32 is composed of a plurality of second electrodes 320, and has a second conductive connection portion 321 between adjacent second electrodes 320 of the same second electrode array 32 for electrically connecting adjacent second electrodes 320. . The material of the second conductive connection portion 321 may also be a metal wire. Although the second figure illustrates that the shape of the first electrode 310 and the second electrode 320 is a diamond shape, it may have other shapes. As shown in the second figure, the first conductive connection portion 311 of the first electrode array 31 and the second conductive connection portion 321 of the second electrode array 32 are provided with an insulating block 33 such that the first electrode array 31 The second electrode array 32 is electrically insulated from each other. In one embodiment, the insulating block 33 has a quadrangular shape with a side length of 80 to 250 micrometers, and the first conductive connecting portion 311 and the second conductive connecting portion 321 have a width of 40 to 80 micrometers. According to one of the features of the embodiment, the insulating block 33 is provided with at least one insulating strip 34 extending in the direction of the first electrode array 31, and is located at the first electrode 310 of the first electrode array 31 and the first conductive connecting portion 311. Within the scope of the graphic structure. The second figure illustrates that each of the first electrode columns 31 has an insulating strip 34 having a width of less than 40 microns, preferably 20 microns. In other embodiments, a plurality of insulating strips 34 are disposed along the direction of the first electrode array 31. Each of the first electrode rows 31 has a plurality of insulating strips 34, and the total width of the insulating strips 34 (including the spacing between the strips) ) less than 40 microns, preferably 20 microns. Compared with the conventional touch panel, the elongated insulating block (as shown by 23 in the first figure), the insulating strip 34 of the present embodiment has a very small width, and thus does not affect the transmittance of the touch panel. [00014] As shown in the second figure, the insulating block 33 and the insulating strip 34 may be integrally formed or separately formed. If it is formed separately, the insulating block 33 may be formed first to form the insulating strip 34, or the insulating strip 34 may be formed first to form the insulating block 33. The insulating block 33 and the insulating strip 34 may be made of optical adhesive (OCA) or cerium oxide. The insulating block 33 and the insulating strip 34 may also contain a photosensitive material, and the desired shape can be formed by an exposure and development process. [0001] The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention; any other equivalent changes or modifications that are not included in the spirit of the disclosure should include It is within the scope of the following patent application.

200‧‧‧ touch panel
21‧‧‧Vertical electrode column
22‧‧‧ horizontal electrode column
23‧‧‧Long insulating block
300‧‧‧Touch electrode device
31‧‧‧First electrode column
310‧‧‧First electrode
311‧‧‧First conductive connection
32‧‧‧Second electrode column
320‧‧‧second electrode
321‧‧‧Second conductive connection
33‧‧‧Insulation block
34‧‧‧Insulation strip

The first figure shows a top view of a conventional touch panel. The second figure shows a partial top view of the touch electrode device of the present embodiment.

300‧‧‧Touch electrode device

31‧‧‧First electrode column

310‧‧‧First electrode

311‧‧‧First conductive connection

32‧‧‧Second electrode column

320‧‧‧second electrode

321‧‧‧Second conductive connection

33‧‧‧Insulation block

34‧‧‧Insulation strip

Claims (12)

A touch electrode device comprising: a transparent substrate; a plurality of first electrode columns formed on the transparent substrate, the first electrode column comprising a plurality of first electrodes, and adjacent to the first electrode in the same first electrode column Having a first conductive connection portion; a plurality of second electrode columns formed on the transparent substrate, the second electrode column comprising a plurality of second electrodes, and located between the adjacent second electrodes of the same second electrode column a second conductive connecting portion; a plurality of insulating blocks respectively located at an intersection of the first conductive connecting portion and the second conductive connecting portion; and a plurality of insulating strips extending at least one direction along the first electrode column direction The insulation strip. The touch electrode device of claim 1 , wherein the first electrode column or the second electrode column comprises a light-transmissive structure formed by a non-transparent conductive material. The touch electrode device of claim 2, wherein the non-transparent conductive material comprises a plurality of metal nanowires or a plurality of metal nanonets. The touch electrode device of claim 1 , wherein the first electrode column or the second electrode column comprises a photosensitive material. The touch electrode device of claim 1 , wherein the first electrode column or the second electrode column comprises a light transmissive structure formed of a transparent conductive material. The touch electrode device of claim 5, wherein the transparent conductive material comprises indium tin oxide (ITO), indium zinc oxide (IZO), zinc aluminum oxide (AZO) or antimony tin oxide (ATO). The touch electrode device of claim 1 , wherein the insulating block has a quadrangular shape with a side length of 80 to 250 micrometers, and the first conductive connecting portion and the second conductive connecting portion have a width of 40 to 80. Micron. The touch electrode device of claim 1 , wherein the insulating strip is located within a graphic structure of the first electrode and the first conductive connection portion of the first electrode column. The touch electrode device of claim 1 , wherein the first electrode column has a corresponding number of the insulating strips and a width of less than 40 micrometers. The touch electrode device of claim 1 , wherein the first electrode column has a plurality of the number of the insulating strips, and the total width of the insulating strips and the spacing between the strips is less than 40 micrometers. The touch electrode device according to [Claim 1], wherein the insulating block or the insulating strip comprises optical glue (OCA) or cerium oxide. The touch electrode device of claim 1, wherein the insulating block or the insulating strip comprises a photosensitive material.