CN103336560A - Protective cover with curved surface and touch panel adopting same - Google Patents

Abstract

The invention provides a touch panel, which includes a display panel and a protective cover covering the display panel. The protective cover includes a substrate, a sensing layer and at least one wire. The substrate includes a touch surface opposite to the display panel and an assembly surface opposite to the touch surface, the assembly surface includes a sensing area and a routing area surrounding the sensing area, the routing area is a curved surface . The sensing layer is formed on the sensing area and is used for sensing a touch action applied on the touch surface. The at least one wire is formed in the wiring area and is electrically connected with the sensing layer. That is to say, the protective cover of the present invention directly arranges the wiring area on the curved surface instead of avoiding the curved surface, so the surface utilization rate of the protective cover can be improved. In addition, in the case of the same size, using a curved surface can increase the surface area of the substrate, further improving the surface utilization of the protective cover.

Description

Protective cover with curved surface and touch panel with same

technical field

The invention relates to touch panel technology, in particular to a protective cover with a curved surface and a touch panel with the protective cover.

Background technique

In an existing touch panel, the touch sensing layer is directly formed on the protective cover without using a separate touch panel, which can reduce the thickness of the touch panel, so it is popular. The touch sensing layer generally includes a touch area and a wiring area, the touch area is used to sense touch, and the wiring area is arranged around the touch area, including the process of making the touch area and processing the sensing signal by using screen printing technology wires for electrical connection. In this way, the processor can receive the sensing signal, and realize the processing and response of the touch signal. Screen printing technology is generally limited to flat printing, but in practical applications, the edge of the protective cover may be set on a curved surface, so it is necessary to avoid the curved surface to set the wiring area, resulting in low surface utilization of the protective cover, which is not conducive to the miniaturization of the touch panel.

Contents of the invention

In view of this, it is necessary to provide a protective cover conducive to miniaturization.

A protective cover for a touch panel, comprising;

A substrate; the substrate includes a touch surface and an assembly surface opposite to the touch surface, the assembly surface includes a sensing area and a routing area surrounding the sensing area, the routing area is a curved surface;

a sensing layer formed in the sensing region, used for sensing a touch action applied on the touch surface; and

At least one wire formed in the wiring area and electrically connected with the sensing layer.

A touch panel comprising:

a display panel; and

A protective cover covering the display panel; the protective cover includes:

A substrate; the substrate includes a touch surface opposite to the display panel and an assembly surface opposite to the touch surface, the assembly surface includes a sensing area and a routing area surrounding the sensing area, the routing The area is a curved surface;

a sensing layer formed in the sensing region, used for sensing a touch action applied on the touch surface; and

At least one wire formed in the wiring area and electrically connected with the sensing layer.

That is to say, the protective cover of the present invention directly arranges the wiring area on the curved surface instead of avoiding the curved surface, so the surface utilization rate of the protective cover can be improved. In addition, in the case of the same size, using a curved surface can increase the surface area of the substrate, further improving the surface utilization of the protective cover.

Description of drawings

FIG. 1 is a schematic perspective view of a touch panel according to a preferred embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the touch panel in FIG. 1 along II-II.

Description of main component symbols

touch panel 10 display panel 12 protection cap 14 Substrate 142 touch surface 1421 Assembly surface 1422 Sensing area 1423 Routing area 1424 raised 1425 groove 1426 Stratification 144 barrier layer 1441 first electrode layer 1442 Insulation 1443 second electrode layer 1444 passivation layer 1445 first electrode wire 1446 second electrode wire 1447 wire 146 Connector 148

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Referring to FIG. 1 , a touch panel 10 according to a preferred embodiment of the present invention includes a display panel 12 and a protective cover 14 covering the display panel 12 . The protective cover 14 includes a substrate 142 , a sensing layer 144 and at least one wire 146 . The substrate 142 includes a touch surface 1421 opposite to the display panel 12 and an assembly surface 1422 opposite to the touch surface. The assembly surface 1422 includes a sensing area 1423 and a wiring area 1424 surrounding the sensing area. . The wiring area 1424 is a curved surface. The sensing layer 144 is formed in the sensing region 1423 for sensing a touch action applied on the touch surface 1421 . The at least one wire 146 is formed in the wiring area 1424 and is electrically connected with the sensing layer 144 .

That is to say, the protective cover 14 of the present invention directly arranges the wiring area 1424 on the curved surface instead of avoiding the curved surface, so the surface utilization rate of the protective cover 14 can be improved. In addition, in the case of the same size, using a curved surface can increase the surface area of the substrate 142 and further improve the surface utilization of the protective cover 14 .

The display panel 12 may be a liquid crystal display panel, an organic light emitting diode (OLED) display panel or other suitable display panels. In this embodiment, the display panel 12 is a liquid crystal display panel.

The substrate 142 is made of transparent materials such as glass, plastic, and sapphire, and has good physical properties, such as high hardness and wear resistance. In this embodiment, the substrate 142 is made of glass.

The protective cover 14 seals the display panel 12 and functions as dustproof, waterproof, drop-proof, and wear-resistant. In addition, since the sensing layer 144 and at least the wires 146 are directly disposed on the substrate 142 , the protective cover 14 also functions as a conventional touch panel.

In order to achieve certain intended purposes, for example, to enlarge the surface area of the substrate 142 while keeping the size unchanged or even reduced, the substrate 142 includes a curved surface, for example, the wiring area 1424 is a concave curved surface. In this embodiment, the entire assembly surface 1422 is a curved surface (such as a concave curved surface), that is to say, the sensing region 1423 is also a curved surface (such as a concave curved surface), and the substrate 142 is equivalent to an optical lens.

Referring to FIG. 2 , the sensing layer 144 is formed in the sensing region 1423 by semiconductor processes such as coating and photolithography. The sensing layer 144 is sequentially stacked with a barrier layer 1441 , a first electrode layer 1442 , an insulating layer 1443 , a second electrode layer 1444 and a passivation layer 1445 from the assembly surface 1422 . The blocking layer 1441 is used to prevent the first electrode layer 1442 and the second electrode layer 1444 from being oxidized, and to dilute the image of the first electrode layer 1442 on the substrate 142 . The first electrode layer 1442 is made of indium tin oxide (ITO), and includes a plurality of first electrode lines 1446 arranged in parallel and equally spaced along a first direction (eg, the length direction of the substrate 142 ). The insulating layer 1443 is used to electrically separate the first electrode layer 1442 and the second electrode layer 1444 and can be made of insulating colloid. The second electrode layer 1444 is made of metal, and includes a plurality of second electrode lines 1447 arranged in parallel and equally spaced along a second direction perpendicular to the first direction (eg, the width direction of the substrate 142 ). The passivation layer 1445 is used to prevent the oxidation of the first electrode layer 1442 and the second electrode layer 1444 .

In this way, when the touch surface 1421 is touched, the capacitance corresponding to the position of the touch point between the first electrode layer 1442 and the second electrode layer 1444 changes, and is converted into a touch signal through the first electrode line 1446 and the second electrode line 1446. The electrode wire 1447 is transmitted out. That is to say, the sensing layer 144 is a capacitive touch sensing layer.

Certainly, the sensing layer 144 may adopt other capacitive touch sensing structures, and may also be a resistive touch sensing layer, which is not limited to this embodiment.

The at least one wire 146 is formed in the wiring area 1424 by three-dimensional circuit forming technology such as laser direct structuring (LDS), and is connected with the first electrode line 1446 and the second electrode line 1447 for connecting This touch signal is transmitted.

In this embodiment, the substrate 142 further includes a protrusion 1425 protruding upward from the assembly surface 1422 in the wiring area 1424 . The protrusion 1425 forms a groove 1426 . The protective cover 14 also includes a connector 148 . The connector 148 is accommodated in the groove 1426 , fixed on the assembly surface 1422 and electrically connected to the at least one wire 146 . The connector 148 is used for connecting with an external connector to transmit the touch signal.

In a word, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention, as long as within the spirit of the present invention, the above examples Appropriate changes and changes all fall within the scope of protection of the present invention.

Claims (10)

1. A protective cover for a touch panel, comprising; A substrate; the substrate includes a touch surface and an assembly surface opposite to the touch surface, the assembly surface includes a sensing area and a routing area surrounding the sensing area, the routing area is a curved surface; a sensing layer formed in the sensing region, used for sensing a touch action applied on the touch surface; and At least one wire formed in the wiring area and electrically connected with the sensing layer. 2. The protective cover according to claim 1, wherein the substrate is made of glass, plastic or sapphire. 3. The protective cover as claimed in claim 1, wherein the sensing area is also a curved surface. 4. The protective cover according to claim 1, wherein the sensing layer is a capacitive touch sensing layer or a resistive touch sensing layer. 5. The protective cover according to claim 1, wherein the sensing layer is sequentially stacked with a barrier layer, a first electrode layer, an insulating layer, a second electrode layer and a passivation layer from the assembly surface , the barrier layer is used to prevent the oxidation of the first electrode layer and the second electrode layer, and dilute the image of the first electrode layer and the substrate, the first electrode layer is made of indium oxide, including a plurality of strips along a first The first electrode lines are arranged at equal intervals in parallel to each other. The insulating layer is used to electrically separate the first electrode layer and the second electrode layer, and is made of insulating colloid; the second electrode layer is made of metal, including A plurality of second electrode lines arranged in parallel and equally spaced along a second direction perpendicular to the first direction; the passivation layer is used to prevent oxidation of the first electrode layer and the second electrode layer. 6. The protective cover according to claim 5, wherein the at least one wire is formed in the wiring area by laser direct structuring technology, and is connected to the first electrode line and the second electrode line for connecting This touch signal is transmitted. 7. The protective cover according to claim 1, wherein the substrate further comprises a protrusion protruding upward from the assembly surface in the wiring area; the protrusion forms a groove; the protective cover also It includes a connector; the connector is accommodated in the groove, fixed on the assembly surface and electrically connected with the at least one wire; the connector is used for connecting with an external connector to transmit the touch signal. 8. A touch panel comprising: a display panel; and A protective cover covering the display panel according to any one of claims 1-8; the touch surface is opposite to the display panel. 9. The touch panel according to claim 8, wherein the display panel is a liquid crystal display panel or an organic light emitting diode display panel. 10. The touch panel as claimed in claim 8, wherein the protective cover seals the display panel.

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