Patent Description:
Embodiments of this application relate to the field of display technologies, and in particular, to an electronic device.

With the continuous development of display module technology of mobile terminal devices such as a mobile phone, development of a light and thin display module has become a development trend of the display module technology. However, with the development of the light and thin display module, requirements for a display module are getting higher and higher.

Currently, a mobile phone mainly includes a display module, a middle frame, and a battery cover. The display module and the battery cover are respectively arranged on two sides of the middle frame. The display module mainly includes a cover, a display layer, and a mounting bracket (Mounting Bracket). The display layer is located between the cover and the mounting bracket, and the mounting bracket is often made of metal materials to improve supporting performance and impact resistance of a back surface thereof. To reduce a risk of signal interference and electro-static discharge (Electro-Static discharge, ESD), the display module is often electrically connected to the middle frame through the mounting bracket to achieve grounding.

However, to increase electrical conductivity between the mounting bracket and the middle frame, it is usually necessary to plate conductive materials on a side of the mounting bracket facing away from the display layer to improve the conductivity. However, after plating the conductive materials on the mounting bracket, a side of the mounting bracket facing the display layer and a position corresponding to the conductive materials are deformed, resulting in uneven reflected light on a deformed region under light exposure after a screen of the mobile phone is off, and observable impressions on appearance of the mobile phone, which affects the appearance of the mobile phone.

<CIT> discloses an electronic device comprising a middle frame assembly which comprises a plastic frame and a metal block arranged on the inner side of the plastic frame, and the plastic frame is approximately in a rectangular ring shape; the display screen is arranged on the middle frame assembly, and a gap is formed between the display screen and the middle frame assembly; and the first conductive part is arranged at the gap and is electrically connected with the metal block, so that static electricity is guided into a ground system of the metal block through the first conductive part. The first conductive piece is arranged between the display screen and the middle frame assembly and is electrically connected with the metal block, so that static electricity can be guided to a ground system of the metal block through the first conductive piece, and the purpose of protecting electronic devices of the electronic device is achieved.

<CIT> discloses conductive foam and electronic equipment.

<CIT> discloses a <NUM> dimensional touch screen panel.

Embodiments of this application provide an electronic device, which improves flatness of a back surface of an electroplating position of a mounting bracket in the electronic device, reduces or avoids uneven light in an electroplating region after a screen of the electronic device is off, and ensures that an impression degree of the electroplating region is reduced or there is no impression when the electronic device is exposed to light.

According to a first aspect of the embodiments of this application, an electronic device is provided. The electronic device includes: a display module, a middle frame, and a battery cover, where the display module and the battery cover are respectively located at two sides of the middle frame;.

The conductive transition layer is added at the periphery of the conductive plating layer, or an outer edge of the conductive plating layer is set to be in an uneven serrated shape, so that a material internal stress generated by a metal plating layer arranged on the mounting bracket gradually reduces from the conductive plating layer to the conductive transition layer. In this way, an arch generated on the first surface of the mounting bracket is gradually reduced to a large flat region, to reduce the impression degree.

In a possible implementation, the conductive transition layer includes a plurality of first sub-transition layers, and the plurality of first sub-transition layers are spaced apart around the outer periphery of the conductive plating layer for one or more turns; and
an area of each of the first sub-transition layers is smaller than an area of the conductive plating layer.

In a possible implementation, the plurality of first sub-transition layers and an outer edge of the conductive plating layer are spaced apart.

In a possible implementation, the conductive transition layer further includes a plurality of second sub-transition layers; and
the plurality of second sub-transition layers are located at an outer periphery of the plurality of first sub-transition layers.

In a possible implementation, an area of the second sub-transition layer is smaller than an area of the first sub-transition layer.

In a possible implementation, each of the second sub-transition layers is located on a centerline between two adjacent first sub-transition layers.

In a possible implementation, shapes of the first sub-transition layer and the second sub-transition layer are any one of a circle, a polygon, or an ellipse.

In a possible implementation, the plurality of first sub-transition layers are spaced apart along the outer periphery of the conductive plating layer on the outer edge of the conductive plating layer; and
two adjacent first transition layers and a part of the outer edge of the conductive plating layer form a notch, so that the outer edge of the conductive plating layer is serrated.

In a possible implementation, a shape of the first sub-transition layer is a semicircle or a polygon.

According to a second aspect of the embodiments of this application, an electronic device is provided. The electronic device includes: a display module, a middle frame, and a battery cover, where the display module and the battery cover are respectively located at two sides of the middle frame;.

A hole is dug on the conductive plating layer, so that an internal stress generated on the conductive plating layer is released at the opening, a material internal stress generated by a metal plating layer arranged on the mounting bracket is reduced, and an arch generated on the first surface of the mounting bracket is reduced to a large flat region, to reduce the impression degree.

In a possible implementation, the plurality of openings are spaced apart around a center of the conductive plating layer for one or more turns.

In a possible implementation, the opening is a round hole, a square hole, or an elliptical hole.

According to a third aspect of the embodiments of this application, an electronic device is provided. The electronic device includes: a display module, a middle frame, and a battery cover, where the display module and the battery cover are respectively located at two sides of the middle frame;.

A region opposite to the conductive plating layer on the first surface of the mounting bracket is thinned to form a recessed region, and the recessed region may compensate for arching deformation, to improve flatness of a surface opposite to the conductive plating layer on the mounting bracket, and avoid an impression when the electronic device is exposed to light.

In a possible implementation, an orthographic projection of the recessed region toward the conductive plating layer completely coincides with the conductive plating layer.

In a possible implementation, a conductive member, where an end of the conductive member is electrically connected to the conductive plating layer, and another end of the conductive member is electrically connected to a metal middle plate of the middle frame.

In a possible implementation, the conductive member is a conductive elastomer or a conductive foam.

In a possible implementation, the electronic device is a foldable device.

In a possible implementation, the mounting bracket is a conductive mounting bracket made of metal alloy or stainless steel.

In a possible implementation, a thickness of the conductive plating layer is less than or equal to <NUM>.

According to a fourth aspect of the embodiments of this application, a display module is provided, and is applied to an electronic device. The display module includes at least a display layer and a mounting bracket, where the mounting bracket includes a first surface and a second surface arranged opposite to the first surface, and the first surface faces the display layer;.

According to a fifth aspect of the embodiments of this application, a display module is provided, and is applied to an electronic device. The display module includes at least a display layer and a mounting bracket, where the mounting bracket includes a first surface and a second surface arranged opposite to the first surface, and the first surface faces the display layer;.

According to a sixth aspect of the embodiments of this application, a display module is provided, and is applied to an electronic device. The display module includes at least a display layer and a mounting bracket, where the mounting bracket includes a first surface and a second surface arranged opposite to the first surface, and the first surface faces the display layer;.

Terms used in implementations of this application are merely intended to explain specific embodiments of this application rather than limit this application. The following describes implementations of the embodiments of this application in detail with reference to the accompanying drawings.

The embodiments of this application provide an electronic device. The electronic device may be, but is not limited to, a mobile terminal, a fixed terminal, or a foldable terminal having a display module such as a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a handheld computer, an intercom, a netbook, a POS terminal, a personal digital assistant (personal digital assistant, PDA), a drive recorder, and a security device.

In the embodiments of this application, an example in which a mobile phone is the electronic device is used for description, and specifically, a foldable mobile phone is used as an example for description. The foldable mobile phone may be an inward foldable mobile phone (that is, a display module is folded inward) or an outward foldable mobile phone (that is, a display module is folded outward). In the embodiments of this application, the inward foldable mobile phone is specifically used as an example for description.

<FIG> is a schematic diagram of a mobile phone in an unfolded state. As shown in <FIG>, an electronic device <NUM> may include: a display module <NUM>, a middle frame <NUM>, a battery cover <NUM>, and a front cover <NUM>. The display module <NUM> and the front cover <NUM> are located at one side of the middle frame <NUM>, the battery cover <NUM> is located at the other side of the middle frame <NUM>, and the front cover <NUM> is connected to the middle frame <NUM>.

The front cover <NUM> is configured to block a connection position between the display module <NUM> and the middle frame <NUM>. There may be a certain gap between the front cover <NUM> and a surface of the display module <NUM>, or the front cover <NUM> and the surface of the display module <NUM> may be in contact but not sealed, so that the front cover <NUM> is not likely to obstruct bending of the display module <NUM> when the mobile phone is folded. The front cover <NUM> may be an insulation front cover.

In the embodiments of this application, as shown in <FIG>, the middle frame <NUM> may include a first middle frame <NUM>, a second middle frame <NUM>, and a rotary connector <NUM>. The first middle frame <NUM> and the second middle frame <NUM> are rotated relative to the rotary connector <NUM>, for example, an end of the first middle frame <NUM> and an end of the second middle frame <NUM> are rotatably connected to two sides of the rotary connector <NUM> respectively, and the other end of the first middle frame <NUM> and the other end of the second middle frame <NUM> are rotatable around the rotary connector <NUM>.

It needs to be noted that, to switch between a folded state and an unfolded state of the mobile phone, when the first middle frame <NUM> and the second middle frame <NUM> are rotated, the front cover <NUM>, the battery cover <NUM>, and the display module <NUM> may all be folded or unfolded with rotation of the first middle frame <NUM> and the second middle frame <NUM>.

For example, as shown in <FIG>, when the mobile phone is in the unfolded state, the first middle frame <NUM> and the second middle frame <NUM> are rotated to a maximum state relative to the rotary connector <NUM>, and the front cover <NUM>, the battery cover <NUM>, and the display module <NUM> are all in the unfolded state. When the first middle frame <NUM> and the second middle frame <NUM> are rotated in a direction of a dashed arrow or a solid arrow in <FIG>, as shown in <FIG>, the mobile phone may be in a semi-folded state, the first middle frame <NUM> and the second middle frame <NUM> are close to each other, and the front cover <NUM>, the battery cover <NUM>, and the display module <NUM> are in a bent state. <FIG> is a schematic diagram of a mobile phone in a folded state. As shown in <FIG>, the first middle frame <NUM> and the second middle frame <NUM> are opposite, and the front cover <NUM>, the battery cover <NUM>, and the display module <NUM> are all in the folded state. Therefore, in the embodiments of this application, the first middle frame <NUM>, the second middle frame <NUM>, the front cover <NUM>, the battery cover <NUM>, and the display module <NUM> are switchable between the folded and unfolded states.

Because the display module <NUM> also needs to be folded during a folding process of the mobile phone, in the embodiments of this application, the display module <NUM> may be an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display screen or another bendable flexible display screen.

The display module <NUM> may be configured to display an image, a text, a video, or the like. As shown in <FIG>, the display module <NUM> includes a first portion 10a, a second portion 10b, and a third portion 10c. The second portion 10b is located between the first portion 10a and the third portion 10c. The first portion 10a, the second portion 10b, and the third portion 10c are all located on a same side of the first middle frame <NUM> and the second middle frame <NUM>. In addition, the first portion 10a is fixed to the first middle frame <NUM>. The second portion 10b is fixed to the rotary connector <NUM> between the first middle frame <NUM> and the second middle frame <NUM>. The third portion 10c is fixed to the second middle frame <NUM>. When the mobile phone is folded, the second portion 10b is bent.

It is understandable that, when the electronic device <NUM> is an inward foldable mobile phone, as shown in <FIG>, the electronic device <NUM> is in the unfolded state, and the first portion 10a, the second portion 10b, and the third portion 10c are at an angle of approximately <NUM> degrees (slight deviations are allowed, for example, <NUM> degrees, <NUM> degrees, or <NUM> degrees). In this case, the display module <NUM> has a continuous display region with a large area, that is, the display module <NUM> may achieve large screen display, making user experience better. When the electronic device <NUM> is in the folded state, the display module <NUM> is located between the first middle frame <NUM> and the second middle frame <NUM> (as shown in <FIG>), the second portion 10b is bent, and the first portion 10a and the third portion 10c overlap each other.

Certainly, in some examples, the electronic device <NUM> is an outward foldable mobile phone (that is, the display module <NUM> is exposed when the electronic device is in the folded state). In this case, the first middle frame <NUM> and the second middle frame <NUM> are located between the first portion 10a and the third portion 10c when the electronic device <NUM> is in the folded state.

<FIG> is an exploded schematic diagram of a mobile phone. As shown in <FIG>, the first middle frame <NUM> may include: a first metal middle plate <NUM> and a first frame <NUM> enclosed on an outer edge of the first metal middle plate <NUM>. The first frame <NUM> may include a side frame, a top frame, and a bottom frame.

The second middle frame <NUM> may include: a second metal middle plate <NUM> and a second frame <NUM> enclosed on an outer edge of the second metal middle plate <NUM>. The second frame <NUM> may include: a side frame, a top frame, and a bottom frame. The rotary connector <NUM> may be respectively connected to the first metal middle plate <NUM> and the second metal middle plate <NUM>.

In the embodiments of this application, the first frame <NUM> and the second frame <NUM> are fixedly connected to the first metal middle plate <NUM> and the second metal middle plate <NUM> through injection molding. The first metal middle plate <NUM> and the second metal middle plate <NUM> may be an aluminum plate, an aluminum alloy, or a magnesium alloy. The first frame <NUM> and the second frame <NUM> may be metal frames, glass frames, or ceramic frames.

As shown in <FIG>, the electronic device <NUM> may further include a circuit board <NUM> and a battery <NUM>. The battery <NUM> may be connected to a charging management module and the circuit board <NUM> through a power management module. The power management module receives an input from the battery <NUM> and/or an input from the charging management module, and supplies power to a processor, an internal memory, an external memory, a foldable display module <NUM>, a camera module, a communication module, and the like. The power management module may be further configured to monitor a parameter such as a capacity of the battery <NUM>, a cycle count of the battery <NUM>, or a health state (electric leakage and impedance) of the battery <NUM>. In some other embodiments, the power management module may also be arranged in the processor of the circuit board <NUM>. In some other embodiments, the power management module and the charging management module may also be arranged in a same device.

It may be understood that the schematic structure in the embodiments of this application constitutes no specific limitation on the electronic device <NUM>. In some other embodiments of this application, the electronic device <NUM> may include more or fewer components than those shown in the figure, or some components may be combined, or some components may be split, or different component arrangements may be used. For example, the electronic device <NUM> may further include devices such as a camera (for example, a front-facing camera and a rear-facing camera) and a camera flash.

As shown in <FIG>, the display module <NUM> may include: a cover (Cover) <NUM>, a display layer <NUM>, and a mounting bracket <NUM>. The display layer <NUM> is located between the cover <NUM> and the mounting bracket <NUM>, and the mounting bracket <NUM> is configured to support the display layer <NUM>. To ensure that the mounting bracket <NUM> has a supporting performance, the mounting bracket <NUM> is often made of a metal material. However, to reduce a risk of signal interference and electro-static discharge (Electro-Static discharge, ESD) during whole machine design, it is necessary to electrically connect a suspended metal (for example, the mounting bracket <NUM>) to the middle frame <NUM> to achieve grounding.

The mounting bracket <NUM> is usually electrically connected to the middle frame <NUM> through a conductive member <NUM>, and the conductive member <NUM> may be a conductive material such as an elastomer or a conductive foam.

The mounting bracket <NUM> is generally made of a copper layer, because the copper layer has good electrical conductivity, and may achieve a good grounding performance with the middle frame <NUM>. However, when the electronic device <NUM> is a foldable device, due to a weight requirement of a whole machine, and a requirement that the mounting bracket <NUM> for a foldable mobile phone should not only meet a supporting performance, but also have a bending function, a thickness of the mounting bracket <NUM> should be small. However, if the mounting bracket <NUM> continues to be made of the copper layer, when a thickness of the copper layer is small, the copper layer cannot play a good supporting role on the display layer <NUM>. Therefore, in a foldable device, the mounting bracket <NUM> is not suitable for being made of the copper layer. Generally, in the foldable device, the mounting bracket <NUM> is made of a thin material which has a good supporting performance such as an alloy material or a stainless steel.

However, when the mounting bracket <NUM> is made of an alloy material (such as an aluminum alloy or a copper alloy), or a stainless steel, or the like, because the alloy material or stainless steel has weak electrical conductivity, when the mounting bracket <NUM> is grounded with the middle frame <NUM> through the conductive member <NUM>, to improve electrical conductivity of a surface of the mounting bracket <NUM>, as shown in <FIG> and <FIG>, the mounting bracket <NUM> includes a first surface 13a and a second surface 13b, the first surface 13a faces the display layer <NUM>, the second surface 13b faces the first metal middle plate <NUM> and the second metal middle plate <NUM> of the middle frame <NUM>, a nickel/gold or another conductive material is plated at a grounding position of the second surface 13b of the mounting bracket <NUM> to form a conductive plating layer <NUM>, and the conductive plating layer <NUM> may improve a conductive performance of the grounding position of the mounting bracket <NUM>, to ensure a stable and effective electrical connection between the mounting bracket <NUM> and the middle frame <NUM> through the conductive member <NUM> and the conductive plating layer <NUM>.

As shown in <FIG>, the conductive plating layer <NUM> is arranged at a local region of the second surface 13b of the mounting bracket <NUM>, and two (referring to <FIG>) or more conductive plating layers <NUM> may be arranged. When there are two conductive plating layers <NUM>, as shown in <FIG>, one conductive plating layer <NUM> may be electrically connected to the first metal middle plate <NUM> of the first middle frame <NUM>, to ground a side of the mounting bracket, and the other conductive plating layer <NUM> may be electrically connected to the second metal middle plate <NUM> of the second middle frame <NUM>, to ground the other side of the mounting bracket.

It needs to be noted that, a shape of the conductive plating layer <NUM> includes but is not limited to a circular shape shown in <FIG>. In some examples, the shape of the conductive plating layer <NUM> may further be polygonal, elliptical, or another irregular shape.

However, an internal stress in a metal generated after the conductive plating layer <NUM> is arranged on the second surface 13b of the mounting bracket <NUM> is uneven, resulting in arching deformation in a region opposite to a position of the conductive plating layer <NUM> on the first surface 13a of the mounting bracket <NUM> (as shown in <FIG>). Therefore, when the electronic device is in normal use, the arching deformation is not easily observed on the electronic device due to an action of the display layer <NUM>. However, when a screen of the electronic device is off and exposed to light, reflection of the arched region to the light is uneven, resulting in observable impressions on an appearance of the region, for example, an uneven impression appears on a position of the display module <NUM> opposite to the conductive plating layer <NUM>, thus affecting an appearance of the electronic device.

To solve the foregoing problems, in the electronic device provided in the embodiments of this application, the conductive transition layer is added at the periphery of the conductive plating layer <NUM>, or an outer edge of the conductive plating layer <NUM> is set to be in an uneven serrated shape, or a hole is dug on the conductive plating layer <NUM>, so that a material internal stress generated by a metal plating layer arranged on the mounting bracket <NUM> is gradually reduced. In this way, a generated arch is gradually reduced to a large flat region, to reduce the impression degree. Alternatively, a region opposite to the conductive plating layer <NUM> on the first surface 13a of the mounting bracket <NUM> is thinned to form a recessed region, and the recessed region may compensate for arching deformation, to improve flatness of a surface opposite to the conductive plating layer <NUM> on the mounting bracket <NUM>, and avoid an impression when the electronic device is exposed to light.

It needs to be noted that, the large flat region specifically refers to a plane region on the first surface of the mounting bracket except an arching deformation region.

The following describes several solutions provided in the embodiments of this application in detail through several embodiments.

In the embodiment of this application, as shown in <FIG>, a conductive plating layer <NUM> is arranged in a partial region of a second surface 13b of a mounting bracket <NUM>, and a conductive transition layer is arranged at an outer periphery of the conductive plating layer <NUM>. As shown in <FIG>, the conductive transition layer includes a plurality of first sub-transition layers <NUM>, and the plurality of first sub-transition layers <NUM> are spaced apart around the outer periphery of the conductive plating layer <NUM> for one or more turns. For example, in <FIG>, the plurality of first sub-transition layers <NUM> are spaced apart around the outer periphery of the conductive plating layer <NUM> for one turn. Certainly, in some examples, the plurality of first sub-transition layers <NUM> are spaced apart around the outer periphery of the conductive plating layer <NUM> for a plurality of turns.

In the embodiment of this application, the conductive plating layer <NUM> is electrically connected to a middle frame <NUM> to ground the mounting bracket <NUM>. Certainly, in some examples, the conductive transition layer may further be electrically connected to the middle frame <NUM> to ground the mounting bracket <NUM>, or both the conductive plating layer <NUM> and the conductive transition layer may be electrically connected to the middle frame <NUM>, to implement a function of grounding a plurality of positions of the mounting bracket <NUM>.

In the embodiment of this application, the plurality of first sub-transition layers <NUM> are spaced apart from an outer edge of the conductive plating layer <NUM>. For example, as shown in <FIG>, the plurality of first sub-transition layers <NUM> are spaced apart from the outer edge of the conductive plating layer <NUM>, so that the two plating layers are spaced apart from each other, to reduce an internal stress in a metal.

It should be noted that, an area of each of the first sub-transition layers <NUM> is smaller than an area of the conductive plating layer <NUM>, thus ensuring that an internal stress of the first sub-transition layer <NUM> is smaller than an internal stress of the conductive plating layer <NUM>, so that arching deformation generated by the first sub-transition layer <NUM> is smaller than arching deformation generated by the conductive plating layer <NUM>.

Therefore, in the embodiment of this application, the plurality of first sub-transition layers <NUM> are arranged at an outer periphery of the conductive transition layer, and the area of each of the first sub-transition layers <NUM> is smaller than the area of the conductive plating layer <NUM>. In this way, an internal stress at the first sub-transition layer <NUM> on the mounting bracket <NUM> is less than an internal stress at a position of the conductive plating layer <NUM>, so that the arching deformation generated by the first sub-transition layer <NUM> is smaller than the arching deformation generated by the conductive plating layer <NUM>. Therefore, in the embodiment of this application, a material internal stress generated on the mounting bracket <NUM> from the conductive plating layer <NUM> to the first sub-transition layer <NUM> is gradually reduced, and a generated arch is gradually reduced to a large flat region. In this way, after a screen of an electronic device is off and is exposed to light, an uneven degree occurring when the light is reflected is gradually reduced from large to small under a transition action of the first sub-transition layer <NUM>, thereby gradually reducing an impression degree. Therefore, the impression degree is gradually weakened visually, and an impression on the electronic device is not visually obvious.

In the embodiment of this application, as shown in <FIG>, a shape of the first sub-transition layer <NUM> may be circular, or as shown in <FIG>, the shape of the first sub-transition layer <NUM> may be polygonal.

Certainly, in some examples, the shape of the first sub-transition layer <NUM> may further be elliptical, triangular, or another shape.

In a possible implementation, as shown in <FIG>, the conductive transition layer further includes a plurality of second sub-transition layers <NUM>. The plurality of second sub-transition layers <NUM> are located at an outer periphery of the plurality of first sub-transition layers <NUM>.

As shown in <FIG>, an area of the second sub-transition layer <NUM> is smaller than an area of the first sub-transition layer <NUM>. Thus, areas of the conductive plating layer <NUM>, the first sub-transition layer <NUM>, and the second sub-transition layer <NUM> are gradually reduced, a material internal stress generated from the conductive plating layer <NUM>, the first sub-transition layer <NUM> to the second sub-transition layer <NUM> is gradually reduced, and an arch generated on a first surface 13a of the mounting bracket <NUM> is gradually reduced to a large flat region, so that after the screen of the electronic device is off and is exposed to light, an uneven degree in light reflection is further gradually reduced from large to small, to gradually reduce the impression degree.

In the embodiment of this application, when the plurality of second sub-transition layers <NUM> are distributed at the outer periphery of the plurality of first sub-transition layers <NUM>, as shown in <FIG>, each of the second sub-transition layers <NUM> is located on a centerline L between two adjacent first sub-transition layers <NUM>. In this way, it is ensured that the arch generated on the first surface 13a of the mounting bracket <NUM> is uniformly and gradually reduced to a flat region, the impression on the electronic device is uniformly distributed, and the impression is not easily distributed unevenly.

Certainly, in some examples, the second sub-transition layer <NUM> may also be arranged away from the centerline L between two adjacent first sub-transition layers <NUM>.

In the embodiment of this application, as shown in <FIG>, a shape of the second sub-transition layer <NUM> may be circular, or the shape of the second sub-transition layer <NUM> may also be polygonal, for example, a square as shown in <FIG>.

Certainly, in some examples, the shape of the second sub-transition layer <NUM> may further be elliptical, triangular, or another shape.

It needs to be noted that, shapes of the first sub-transition layer <NUM> and the second sub-transition layer <NUM> may be the same or different. When two conductive plating layers <NUM> are arranged on the first surface 13a of the mounting bracket <NUM>, the first sub-transition layer <NUM> and the second sub-transition layer <NUM> at an outer periphery of the two conductive plating layers <NUM> may be the same or different.

It should be noted that, when the shapes of the first sub-transition layer <NUM> and the second sub-transition layer <NUM> are polygons (such as triangles or polygons), because a metal plating layer of a polygon has a sharp corner, an internal stress is more obviously concentrated. When the shapes of the first sub-transition layer <NUM> and the second sub-transition layer <NUM> are circular, the internal stress is relatively dispersed, so a generated arching deformation degree is less than an arching deformation degree caused by a polygonal metal plating layer.

In a possible implementation, as shown in <FIG>, the plurality of first sub-transition layers <NUM> are spaced apart along an outer periphery of the conductive plating layer <NUM> on the outer edge of the conductive plating layer <NUM>, for example, the plurality of first sub-transition layers <NUM> are adjacent to the outer edge of the conductive plating layer <NUM>, and two adjacent first transition layers and a part of the outer edge of the conductive plating layer <NUM> form a notch 131a, so that the outer edge of the conductive plating layer <NUM> is serrated. In this way, the outer edge of the conductive plating layer <NUM> has an uneven and serrated structure, and a notch 131a is provided between the serrated structures, so that a material internal stress generated by a metal plating layer arranged on the mounting bracket <NUM> is reduced. In this way, a generated arch is reduced to a large flat region, to reduce the impression degree.

In the embodiment of this application, as shown in <FIG>, the shape of the first sub-transition layer <NUM> may be polygonal, or as shown in <FIG>, the shape of the first sub-transition layer <NUM> may be semicircular. Certainly, in some examples, the shape of the first sub-transition layer <NUM> may further be polygonal, triangular, or sector-shaped. In this embodiment, shapes of the plurality of first sub-transition layers <NUM> may be the same or different, and shapes of the plurality of second sub-transition layers <NUM> may be the same or different. In the embodiment of this application, the shape of the first sub-transition layer <NUM> is not limited.

It needs to be noted that, in <FIG> and <FIG>, the second sub-transition layers <NUM> may further be arranged at positions opposite the notches 131a, so that the first sub-transition layer <NUM> is arranged next to the outer edge of the conductive plating layer <NUM>, and the second sub-transition layer <NUM> is spaced apart from the outer edge of the conductive plating layer <NUM>.

A difference from the foregoing embodiment is as follows: In this embodiment, as shown in <FIG>, a plurality of openings <NUM> are provided on a conductive plating layer <NUM>, and a hole bottom of the opening <NUM> extends to a second surface 13b of a mounting bracket <NUM>. Thus, the conductive plating layer <NUM> is a non-connected plating layer, the opening <NUM> is provided on the conductive plating layer <NUM>, and the opening <NUM> is provided to release a material internal stress generated by the conductive plating layer <NUM>, thereby reducing a stress of the conductive plating layer <NUM>. In this way, a generated arch is gradually reduced to a large flat region, to reduce an impression degree.

In the embodiment of this application, the plurality of openings <NUM> are spaced apart around a center of the conductive plating layer <NUM> for one or more turns. For example, as shown in <FIG>, the plurality of openings <NUM> are spaced apart around the center of the conductive plating layer <NUM> for one turn. The plurality of openings <NUM> may be close to an outer edge of the conductive plating layer <NUM>, which facilitates reduction of an internal stress of the conductive plating layer <NUM>. Certainly, in some examples, the plurality of openings <NUM> may further be located at any position between the center and the outer edge of the conductive plating layer <NUM>.

In the embodiment of this application, as shown in <FIG>, the opening <NUM> may be a round hole, or the opening <NUM> may also be a square hole or an elliptical hole. In the embodiment of this application, a shape of the opening <NUM> is not limited.

In the embodiment of this application, as shown in <FIG>, a recessed region <NUM> is provided on a first surface 13a of a mounting bracket <NUM>, and a conductive plating layer <NUM> is arranged at a position opposite to the recessed region <NUM> on a second surface 13b of the mounting bracket <NUM>. Thus, when an internal stress is generated in the conductive plating layer <NUM> on the second surface 13b of the mounting bracket <NUM>, the recessed region <NUM> on the first surface 13a of the mounting bracket <NUM> is arched and deformed, to compensate for arching deformation through the recessed region <NUM>. In this way, as shown in <FIG>, no arching deformation occurs on the first surface 13a of the mounting bracket <NUM>, and flatness of the first surface 13a of the mounting bracket <NUM> is improved, thereby avoiding occurrence of an impression when an electronic device is exposed to light.

Therefore, in the electronic device provided in the embodiment of this application, the recessed region <NUM> is formed on a region opposite to the conductive plating layer <NUM> on the first surface 13a of the mounting bracket <NUM>, and the recessed region <NUM> may compensate for the arching deformation, to improve flatness of a surface opposite to the conductive plating layer <NUM> on the mounting bracket <NUM> and avoid an impression when the electronic device is exposed to light.

In the embodiment of this application, when the recessed region <NUM> is formed on the first surface 13a of the mounting bracket <NUM>, specifically, a position opposite to conductive plating on the first surface 13a of the mounting bracket <NUM> may be thinned by performing thinning processing, such as etching, on the first surface 13a of the mounting bracket <NUM>. It needs to be noted that, a depth of the recessed region <NUM> is specifically set based on a height of the arching deformation in <FIG>.

In a possible implementation, a forward projection of the recessed region <NUM> toward the conductive plating layer <NUM> completely coincides with the conductive plating layer <NUM>, ensuring that arching deformation caused by the conductive plating layer <NUM> can be compensated in the recessed region <NUM> and that arching deformation does not occur on the first surface 13a of the mounting bracket <NUM> when the conductive plating layer <NUM> is arranged on the second surface 13b of the mounting bracket <NUM>.

It needs to be noted that, the technical solution provided in this application is described by using a foldable mobile phone as an example. In some examples, the technical solution provided in this application is also applicable to a non-foldable mobile phone. For example, the solution provided in this application is also applicable to a bar phone. In this case, when the solution is adopted in the bar phone, because the mounting bracket <NUM> is made of a thin material such as an alloy or a stainless steel, a thickness of the display module <NUM> may be reduced, to reduce a thickness of the bar phone, or to save space in the bar phone for arranging another device.

In the descriptions of the embodiments of this application, it should be noted that, unless expressly stated and defined otherwise, the terms "mounting", "connected", "connection", or the like are to be construed broadly, for example, as a fixed connection, an indirect connection through an intermediary, or internal communication between two elements or mutual interaction relationship between two elements. A person of ordinary skill in the art may understand the specific meanings of the foregoing terms in the embodiments of this application according to specific situations.

In the embodiments of this application, it is implied that an apparatus or element in question needs to have a particular orientation, or needs to be constructed and operated in a particular orientation, and therefore cannot be construed as a limitation on the embodiments of this application. In the description of the embodiments of this application, unless otherwise exactly and specifically ruled, "a plurality of" means two or more than two.

In the specification of the embodiments of this application, claims, and accompanying drawings, the terms "first", "second", "third", "fourth", and so on (if existing) are intended to distinguish between similar objects but do not necessarily indicate a specific order or sequence. It is to be understood that data used in this way is interchangeable in a suitable case, so that the embodiments of the embodiments of this application described herein can be implemented in a sequence in addition to the sequence shown or described herein. Furthermore, the terms "may include" and "have" and any variation thereof are intended to cover non-exclusive inclusion. For example, processes, methods, systems, products, or devices including a series of steps or units are not necessarily limited to those steps or units expressly listed, and instead, may include other steps or units not expressly listed or inherent to these processes, methods, products, or devices.

Claim 1:
An electronic device (<NUM>), comprising: a display module, a middle frame, and a battery cover, wherein the display module and the battery cover are respectively located at two sides of the middle frame;
the display module comprises at least a display layer and a mounting bracket (<NUM>), the mounting bracket (<NUM>) comprises a first surface (13a) and a second surface, the first surface (13a) faces the display layer, and the second surface faces the middle frame;
a conductive plating layer (<NUM>) is arranged on a partial region of the second surface of the mounting bracket (<NUM>); and
the conductive plating layer (<NUM>) is electrically connected to the middle frame;
the electronic device (<NUM>) being characterized in that:
a conductive transition layer is arranged at an outer periphery of the conductive plating layer (<NUM>).