TWM581722U - Touch panel - Google Patents

Abstract

Touch panel includes a first touch layer, a second touch layer, an ink layer and a flexible cover plate. The second touch layer is disposed on the first touch layer. The ink layer is disposed on the second touch layer. The flexible cover plate is disposed on the ink layer.

Description

Touch panel

This new type relates to touch panels.

With the development of technology, touch panels are becoming more and more widely used. In recent years, curved or flexible touch display devices have been developed, such as curved mobile phones, folding mobile phones, or curved displays. However, most of the current touch panels use a glass cover plate, which cannot be widely bent due to the material, and thus cannot be applied to a curved or flexible device. In view of this, there is a need to improve the current touch panel so that it can be applied to a flexible device.

One aspect of the present invention provides a touch panel including a first touch layer, a second touch layer, an ink layer, and a flexible cover. The second touch layer is disposed on the first touch layer. The ink layer is disposed on the second touch layer. The flexible cover is disposed on the ink layer.

In one embodiment, the flexible cover sheet comprises polyethersulfone (PES), polyimide (PI), polyethylene naphthalate (PEN), polyterephthalic acid. Polyethylene terephthalate (PET), Polycarbonate (PC), polyacrylate (PAR) or polycyclic olefin (PCO).

In one embodiment, the touch panel further includes a first adhesive layer disposed between the first touch layer and the second touch layer.

In one embodiment, the first adhesive layer comprises an optical glue.

In one embodiment, the touch panel further includes a second adhesive layer disposed between the second touch layer and the ink layer.

In one embodiment, the second adhesive layer comprises an optical glue.

In one embodiment, the touch panel includes a touch area and a non-touch area, and the non-touch area surrounds the touch area.

In one embodiment, the ink layer is disposed in the non-touch area and surrounds the touch area.

In one embodiment, the ink layer is opaque.

In one embodiment, the first touch layer and the second touch layer comprise indium tin oxide, indium zinc oxide, indium tin zinc oxide, antimony oxide, zinc oxide, aluminum oxide, aluminum oxide tin, aluminum zinc oxide, and oxidation. Cadmium tin or cadmium zinc oxide.

The above description will be described in detail in the following embodiments, and further explanation of the technical solutions of the present invention will be provided.

100‧‧‧ touch panel

110‧‧‧First touch layer

111‧‧‧ touch area

112‧‧‧ Non-touch area

120‧‧‧Second touch layer

130‧‧‧Ink layer

140‧‧‧Flexible cover

150‧‧‧First adhesive layer

160‧‧‧Second Adhesive Layer

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. 1 is a cross-sectional view of a touch panel 100 according to some embodiments of the present invention; and FIG. 2 is a top view of the touch panel 100 according to some embodiments of the present invention.

In order to make the description of the present invention more complete and complete, reference is made to the accompanying drawings and the accompanying drawings. On the other hand, well-known elements and steps are not described in the embodiments to avoid unnecessarily limiting the present invention.

Please refer to FIG. 1 , which is a cross-sectional view of a touch panel 100 according to some embodiments of the present invention. The touch panel 100 includes a first touch layer 110 , a second touch layer 120 , an ink layer 130 , and a flexible cover 140 .

The first touch layer 110 can be a transparent conductive layer. In some embodiments, the first touch layer 110 comprises indium tin oxide, indium zinc oxide, indium tin zinc oxide, antimony oxide, zinc oxide, aluminum oxide, aluminum oxide tin, aluminum zinc oxide, cadmium tin oxide, and cadmium oxide. Zinc or other suitable material. The first touch layer 110 is used to sense touch. In some embodiments, the first touch layer 110 is electrically connected to a touch wafer (not shown). Therefore, the first touch layer 110 transmits the detected electrical signals to the touch wafer.

The second touch layer 120 is disposed on the first touch layer 110 . The second touch layer 120 can be a transparent conductive layer. In some embodiments, the second touch layer 120 comprises indium tin oxide, indium zinc oxide, indium tin zinc oxide, antimony oxide, zinc oxide, aluminum oxide, aluminum oxide tin, aluminum zinc oxide, cadmium tin oxide, and cadmium oxide. Zinc Or other suitable materials. In some embodiments, the first touch layer 110 is the same material as the second touch layer 120. Similar to the first touch layer 110, the second touch layer 120 is also electrically connected to the touch wafer. Therefore, the second touch layer 120 also transmits the detected electrical signals to the touch wafer. The touch wafer analyzes the position touched by the user by the signals transmitted by the first touch layer 110 and the second touch layer 120.

In some embodiments, the first touch layer 110 and the second touch layer 120 respectively include a driving electrode (Tx) or a sensing electrode (Rx). For example, the first touch layer 110 includes a driving electrode (Tx), and the second touch layer 120 includes a sensing electrode (Rx). Alternatively, the first touch layer 110 includes a sensing electrode (Rx), and the second touch layer 120 includes a driving electrode (Tx).

The ink layer 130 is disposed on the second touch layer 120. In some embodiments, the ink layer is opaque. In some embodiments, the ink layer is formed from an opaque ink. The ink layer 130 is used to shield electronic components (such as peripheral wires) around the touch panel 100 to improve the aesthetics of the touch panel 100.

The flexible cover 140 is disposed on the ink layer 130. In some embodiments, the ink layer 130 is first printed on the flexible cover 140, and the ink layer 130 and the flexible cover 140 are attached to the second touch layer 120. In some embodiments, the flexible cover 140 is made of plastic. The flexible cover plate 140 may comprise polyethersulfone (PES), polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (polyethylene terephthalate). Polyethylene terephthalate, PET), polycarbonate (PC), Polyacrylate (PAR) or polycyclic olefin (PCO). In some embodiments, the flexible cover 140 can have a thickness from 50 microns to 125 microns, such as 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 110 microns, or 120 microns. In other embodiments, the thickness of the flexible cover 140 is not limited.

Since the flexible cover 140 is made of a soft plastic material, it is less susceptible to chipping than a general glass cover, and thus the safety of the touch panel can be increased. It is worth noting that since the flexible cover 140 is made of a soft material, it can be bent. In some embodiments, the touch panel 100 is a flexible touch panel. In addition, since the plastic material is easier to make a thinner thickness than the glass material, the touch panel 100 is also suitable for a thin touch panel.

In some embodiments, the touch panel 100 further includes a first adhesive layer 150 disposed between the first touch layer 110 and the second touch layer 120 . The first touch layer 110 and the second touch layer 120 are bonded by the first adhesive layer 150 . In some embodiments, the first adhesive layer 150 comprises an optical clear adhesive (OCA).

In addition, in some embodiments, the touch panel 100 further includes a second adhesive layer 160 disposed between the ink layer 130 and the second touch layer 120 . In detail, since the ink layer 130 exposes a portion of the flexible cover 140, the second adhesive layer 160 contacts the flexible cover 140. In other words, the flexible cover 140 and the second touch layer 120 are also bonded by the second adhesive layer 160. In some embodiments, the second adhesive layer 160 comprises an optical clear adhesive (OCA).

In some embodiments, the first adhesive layer 150 and the second adhesive layer 160 have a thickness of 100 microns or more, such as 100 microns, 125 microns, or 150 microns. In some embodiments, the adhesion of the first adhesive layer 150 and the second adhesive layer 160 is preferably 20 N/25 mm or more. In a further embodiment, the first adhesive layer 150 and the second adhesive layer 160 may be liquid optical glue or solid optical glue, which can be cured by ultraviolet light to produce an adhesive effect.

FIG. 2 is a top view of the touch panel 100 in accordance with some embodiments of the present invention. Referring to FIG. 1 and FIG. 2 simultaneously, the touch panel 100 includes a touch area 111 and a non-touch area 112 , wherein the non-touch area 112 surrounds the touch area 111 .

In some embodiments, the driving electrodes (Tx) and the sensing electrodes (Rx) of the first touch layer 110 and the second touch layer 120 are disposed in the touch region 111. It should be understood that the ink layer 130 is disposed only in the non-touch area 112. In some embodiments, the ink layer 130 has the same shape as the non-touch area 112. In some embodiments, the ink layer 130 completely covers the non-touch area 112. The length and width of the ink layer 130 can be arbitrarily adjusted as needed. As described above, the ink layer 130 can shield other components in the non-touch area 112 to make the touch panel 100 more beautiful.

The present invention uses a flexible cover instead of a general glass cover, and can be applied to a flexible touch panel or a flexible touch display panel. In addition, since the material of the flexible cover is made of a plastic material, it can be easily processed into an arbitrary shape, and the thickness of the cover can be greatly reduced. Moreover, the flexible cover is less fragile than the general glass cover, so the safety of the touch panel can also be increased.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any one skilled in the art can make various changes and retouchings without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

Claims (10)

A touch panel includes: a first touch layer; a second touch layer disposed on the first touch layer; an ink layer disposed on the second touch layer; and a flexible cover a plate disposed on the ink layer. The touch panel of claim 1, wherein the flexible cover comprises polyethersulfone (PES), polyimide (PI), polyethylene naphthalate (PEN) ), polyethylene terephthalate (PET), polycarbonate (PC), polyacrylate (PAR) or polycyclic olefin (PCO). The touch panel of claim 1 further includes a first adhesive layer disposed between the first touch layer and the second touch layer. The touch panel of claim 3, wherein the first adhesive layer comprises an optical adhesive. The touch panel of claim 1, further comprising a second adhesive layer disposed between the second touch layer and the ink layer. The touch panel of claim 5, wherein the second The adhesive layer contains optical glue. The touch panel of claim 1, wherein the touch panel comprises a touch area and a non-touch area, the non-touch area surrounding the touch area. The touch panel of claim 7, wherein the ink layer is disposed in the non-touch area and surrounds the touch area. The touch panel of claim 1, wherein the ink layer is opaque. The touch panel of claim 1, wherein the first touch layer and the second touch layer comprise indium tin oxide, indium zinc oxide, indium tin zinc oxide, antimony oxide, zinc oxide, aluminum oxide, and oxidation. Aluminum tin, aluminum zinc oxide, cadmium tin oxide or cadmium zinc oxide.