CN103631438A - Touch screen with cambered surface and electronic product - Google Patents

Abstract

The invention provides a touch screen with a curved surface and an electronic product using the same. The touch screen includes a protective panel and a conductive film. The protective panel includes an integrally formed top plate and side plates. At least one section of the protective panel is facing The outer convex arc, the radius of curvature of the inner surface of the arc area is greater than 0.1mm, the conductive film is attached to the inner surface of the protective panel and covers the arc area of the protective panel, the conductive film It includes a base layer and a transparent conductive layer formed on the base layer and away from the side of the protection panel. When the protection panel of the present invention is assembled with the casing of the electronic device, the bottom end of the side plate of the protection panel is combined with the casing, so that the user will not be disturbed by the seam when performing touch operations on the top surface (operating surface) of the top panel , the touch feel is better, and the user performance is better.

Description

Touch screen and electronic products with curved surface

technical field

The invention relates to the field of touch technology, in particular to a touch screen with a curved surface and an electronic product.

Background technique

At present, touch screens are widely used in various electronic devices, such as cameras, mobile phones, MP4 and other electronic devices, which are mainly combined with display screens to perform graphic touch operations and receive input signals such as touch.

As shown in Figure 1, the existing touch screen includes a protective panel 1 with protective and decorative effects and a conductive film attached to the protective panel. The conductive film includes a substrate and a conductive layer disposed on the substrate. The conductive layer It includes a transparent conductive pattern located in the middle of the substrate and lead wires located at the edge of the substrate. The lead wire is electrically connected with the conductive pattern for transmitting electrical signals.

Existing protective panels are all flat, and the shape is relatively simple. At the same time, when the flat protective panel 1 is combined with the casing 3 of the electronic device, there are many seams 4 at the connection between the operation surface 5 of the protective panel 1 and the casing 3 (marked by the arrow in the figure below). The existence of affects the user's touch experience. Moreover, when the user slides their fingers, sweat and dirt are likely to remain on the seams, thereby breeding bacteria and affecting the user's health.

Contents of the invention

In order to solve the above problems, the present invention provides a touch screen with a curved surface and an electronic product using it, and its technical solution is as follows:

A touch screen with a curved surface, including a protective panel and a conductive film. The protective panel includes an integrally formed top plate and side plates. At least one section of the protective panel is an arc protruding outward. The radius of curvature of the inner surface is greater than 0.1mm, the conductive film is attached to the inner surface of the protective panel and covers the arc-shaped area of the protective panel, the conductive film includes a base layer and is formed on the base layer and is away from the protective panel by a side transparent conductive layer.

The connection part between the top plate and the side plate of the protective panel is an arc-shaped connection part, and the conductive film forms a bending part corresponding to the arc-shaped connection part of the protective panel. The conductive film is provided with several openings at intervals along the bending part, which can reduce the The stress when the conductive film is bent is small, which is convenient for bending and bonding.

The top plate of the protective panel is in the shape of a straight sheet, at least one side plate is arc-shaped, and the arc-shaped side plate is a circular arc or an elliptical arc, and the top plate is tangent to the arc-shaped side plate.

The top plate is arc-shaped, and the side plates are straight.

The material of the protective panel includes glass, polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), and polyethylene terephthalate (PET).

The protective panel can be realized by injection molding or thermocompression molding.

When the protective panel glass is molded by injection molding, the molten optical glass slurry is poured into a low-temperature mold cavity for cooling and forming, and the internal temperature of the low-temperature mold cavity is 50°C or more higher than the glass transition point of the panel material .

The step of thermoforming the protective panel glass is as follows:

1) Heat and soften the glass raw material, the softening temperature is 1100-1250°C, and the softening time is 1-2 minutes;

2) Control the temperature of the upper mold of the hot pressing mold at 400-450°C and the temperature of the lower mold at 430-630°C by heating;

3) Put the softened glass raw material into the lower mold with a molding surface, and then close the upper mold and the lower mold to make the glass raw material hot-pressed. The hot-pressing pressure is 3.5-5.5MPa, and the hot-pressing time is 5-60S .

With the above-mentioned electronic product with a curved touch screen, the bottom end of the side plate of the protective panel is combined with the casing of the electronic product.

A display module and a drive module are arranged inside the protective panel and the casing.

The above-mentioned protective panel can be directly formed by injection molding or thermocompression forming into a small piece structure, or can be obtained by cutting a large piece structure obtained by injection molding or thermocompression forming into required small pieces.

When the protective panel is assembled with the casing of the electronic device, the bottom end of the side plate of the protective panel is combined with the casing, so that the user will not be disturbed by the seam when performing touch operations on the top surface (operating surface) of the top panel, and the touch The control feels better and the user performance is better.

Description of drawings

Fig. 1 is the structural representation of prior art;

Fig. 2 is a schematic structural view of Embodiment 1 of the protective panel provided by the present invention;

3 and 4 are perspective views of different viewing angles of Embodiment 1 of the protective panel provided by the present invention;

5 is a schematic structural view of Embodiment 2 of the protective panel provided by the present invention;

Fig. 6 is a schematic structural view of Embodiment 3 of the protective panel provided by the present invention;

Fig. 7 is a schematic structural diagram of an embodiment of an electronic product provided by the present invention.

Detailed ways

The touch screen with a curved surface provided by the present invention, as shown in Figures 1-6, includes a protective panel 1 and a conductive film 2. The protective panel 1 includes an integrally formed top plate 11 and side panels 12. The protective panel 1 has at least One section is an arc protruding outward, the radius of curvature of the inner surface of the arc area is greater than 0.1mm, and the conductive film 2 is bonded to the inner surface of the protective panel 1 through an optical adhesive layer 21 and covers the protective panel 1. In the arc-shaped area of the panel 1, the conductive film 2 includes a base layer and a transparent conductive layer formed on the base layer and away from the side of the protective panel.

The transparent conductive layer is usually coated with indium tin oxide (ITO). The coating is brittle and has a certain resistance to compression but not tensile. Therefore, when the coating is placed on the inside of the curved surface and the radius of curvature is controlled, it can be guaranteed not to crack.

As shown in FIG. 2 , the connecting portion between the top plate 11 and the side plate 12 is an arc-shaped connecting portion, and light-shielding layers 22 are provided on the side walls on both sides.

In the schematic diagram of the assembled state shown in FIG. 3 , it is a schematic diagram of lamination of the conductive film 2 and the protective panel 1 .

In FIG. 4 , the conductive film 2 includes a base layer 23 and a conductive layer 24 . The conductive film 2 forms a bent part corresponding to the arc-shaped connection part of the protective panel 1, and the bent part is provided with a plurality of openings 25 at intervals, which can effectively reduce the stress when the conductive film 2 is bent, and is convenient for bending and bonding.

Embodiment 2 As shown in FIG. 5 , the top plate 11 of the protective panel 1 is in the shape of a straight plate, and at least one side plate 12 is in the shape of an arc. Is the arc-shaped side plate 12 a circular arc or an elliptical arc, and the top plate 11 is tangent to the arc-shaped side plate 12 .

Embodiment 3 As shown in FIG. 6 , the top plate 11 is arc-shaped, and the side plate 12 is straight.

In the above embodiments, the material of the protective panel 1 can be glass, polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), polyethylene terephthalate (PET ) and other optically transparent materials. The flexible substrate is one of optically transparent materials such as polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), polyethylene terephthalate (PET), and the like.

The above special-shaped protective panel can be realized by injection molding or thermocompression molding technology.

The steps of glass injection molding are as follows: pour molten optical glass slurry into a low-temperature mold cavity and cool and form it. The internal temperature of the low-temperature mold cavity is 50°C higher than the glass transition point of the panel material to prevent sudden Cooling deforms the resulting product.

The steps of hot press molding of the glass are: heating and softening the raw panel material by heating; controlling the temperature of the upper mold and the lower mold of the hot press forming mold within a certain temperature range by heating; putting the softened panel raw material into the lower mold with a forming curved surface, and then the upper mold and the lower mold are closed, so that the glass raw material is hot-pressed and formed.

Taking glass as an example, the steps of thermoforming are:

Heat and soften the glass material by heating, the softening temperature is 1100-1250°C, and the softening time is 1-2 minutes;

By heating, the temperature of the upper mold of the thermoforming mold is controlled at 400-450°C, and the temperature of the lower mold is controlled at 430-630°C;

Put the softened glass raw material into the lower mold with a forming curved surface, then close the upper mold and the lower mold to make the glass raw material hot-pressed, the hot-pressing pressure is 3.5-5.5MPa, and the hot-pressing time is 5-60S.

The aforementioned special-shaped panels can be directly formed by injection molding or thermocompression forming into small pieces, or can be cut into required small pieces from large pieces of structure obtained by injection molding or thermocompression molding.

For the electronic product shown in Figure 7, when the panel 1 is assembled with the casing 3 of the electronic device, a display module 31 and a drive module 32 are arranged in the protective panel 1 and the casing 3, and the side plate 12 of the protective panel 1 The bottom end is combined with the casing 3, so that the user will not be disturbed by the seams when performing touch operations on the top surface (operating surface) of the top plate, the touch feel is better, and the user experience is better.

Claims (12)

1. A touch screen with a curved surface, comprising a protective panel and a conductive film, characterized in that: the protective panel includes an integrally formed top plate and side panels, and at least one section of the protective panel is an outwardly protruding arc, The conductive film is attached to the inner surface of the protective panel and covers the arc-shaped area of the protective panel. 2. The touch screen with a curved surface according to claim 1, wherein the conductive film comprises a base layer and a transparent conductive layer disposed on one side of the base layer, and the transparent conductive layer disposed on one side of the base layer is far away from the base layer. the protective panel described above. 3. The arc-shaped touch screen according to claim 1 or 2, wherein the radius of curvature of the outwardly protruding arc-shaped inner surface of the protective panel is larger than 0.1 mm. 4. The touch screen with a curved surface according to claim 1 or 2, characterized in that: the connection between the top plate and the side plate of the protective panel is an arc-shaped connection, and the conductive film corresponds to the arc-shaped connection of the protective panel The part forms a bending part, and the conductive film is provided with several openings at intervals along the bending part, which can reduce the stress when the conductive film is bent, and is convenient for bending and bonding. 5. The touch screen with a curved surface according to claim 1 or 2, characterized in that: the top plate of the protective panel is in the shape of a straight plate, at least one side plate is arc-shaped, and the arc-shaped side plate is an arc Or elliptical arc, the top plate is tangent to the curved side plate. 6. The touch screen with a curved surface according to claim 1 or 2, wherein the top board is curved, and the side boards are straight. 7. The curved touch screen according to claim 1 or 2, characterized in that: the material of the protective panel includes glass, polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), polyethylene terephthalate (PET). 8. The curved touch screen according to claim 1 or 2, wherein the protective panel can be realized by injection molding or thermocompression molding. 9. The touch screen with a curved surface according to claim 1 or 2, characterized in that: when the protective panel glass is molded by injection molding, the molten optical glass slurry is poured into a low-temperature mold cavity and then cooled and formed , the internal temperature of the low-temperature mold cavity is higher than the glass transition point of the panel material by more than 50°C. 10. The touch screen with a curved surface according to claim 8, wherein the step of thermoforming the protective panel comprises: 1) Heat and soften the glass raw material, the softening temperature is 1100-1250°C, and the softening time is 1-2 minutes; 2) Control the temperature of the upper mold of the hot pressing mold at 400-450°C and the temperature of the lower mold at 430-630°C by heating; 3) Put the softened glass raw material into the lower mold with a molding surface, and then close the upper mold and the lower mold to make the glass raw material hot-pressed. The hot-pressing pressure is 3.5-5.5MPa, and the hot-pressing time is 5-60S . 11. An electronic product comprising a touch screen with a curved surface according to any one of claims 1-10, wherein the bottom end of the side plate of the protective panel is combined with the casing of the electronic product. 12. The electronic product according to claim 11, wherein a display module and a driving module are arranged in the protective panel and the housing.

Images