KR102623178B1 - Magnetic field shielding sheet for portable device and portable device having the same - Google Patents

Abstract

The present invention relates to a magnetic field shielding sheet for a portable terminal and a portable terminal provided therewith, and at least one shielding sheet is disposed between a digitizer and a folding plate or between a folding plate and a support plate to shield the digitizer from a magnetic field.

Description

Magnetic field shielding sheet for portable terminal and portable terminal having the same {Magnetic field shielding sheet for portable device and portable device having the same}

The present invention relates to a magnetic field shielding sheet for a portable terminal and a portable terminal provided therewith, and more specifically, to a magnetic field shielding sheet for a portable terminal that minimizes the effect of a magnetic field on a digitizer and a portable terminal provided therewith.

Generally, a mobile terminal refers to a terminal such as a mobile phone that a user can use while moving. Among mobile phones, foldable phones are made with a foldable screen using a flexible OLED display. Foldable phones have the advantage of improving portability through the folding process and being able to use a wide screen when unfolded.

A foldable phone may be equipped with a hinge portion to fold or unfold the display screen. The hinge portion has a hinge plate that is connected to the hinge axis and rotates around the hinge axis. The hinge plate is made of stainless steel, which is light in weight and has excellent rigidity to ensure robustness and safety.

However, if a magnetic field is generated by an external magnetic field in a stainless steel hinge plate, this magnetic field may affect the digitizer and reduce its performance. In other words, the magnetic field interferes with the interaction between the electronic pen and the digitizer, making it difficult to detect the exact location of the electronic pen and causing malfunction.

The purpose of the present invention is to provide a magnetic field shielding sheet for a portable terminal that has a magnetic field shielding effect to minimize the influence of the magnetic field generated from the hinge plate of the hinge portion on the digitizer, and a portable terminal provided therewith.

A portable terminal according to an embodiment of the present invention for achieving the above-described object includes a digitizer, a folding plate disposed below the digitizer, and a support device disposed below the folding plate and provided with a hinge portion to enable folding and unfolding. A portable terminal including a plate, comprising at least one shielding sheet that shields a magnetic field from a digitizer, and the shielding sheet may be disposed between the digitizer and the folding plate or between the folding plate and the support plate.

The shielding sheet may include a first shielding sheet and a second shielding sheet that are disposed at a position corresponding to the hinge portion and shield the magnetic field generated in the hinge portion.

The support plate includes a first support plate and a second support plate disposed on both sides of the hinge portion, and the hinge portion includes a first hinge plate connected to the first support plate and a second hinge plate connected to the second support plate. And, the first hinge plate and the second hinge plate are rotatably connected about the hinge axis, and the first shielding sheet and the second shielding sheet are disposed at positions corresponding to the first hinge plate and the second hinge plate. You can.

The first shielding sheet and the second shielding sheet may be arranged on both sides at a distance from the hinge axis.

The first hinge plate and the second hinge plate are provided in plural pieces at intervals along the longitudinal direction of the hinge axis, and the first shielding sheets are provided in plural pieces and disposed at positions corresponding to each of the first hinge plates, and the second shielding sheet may be provided in plural pieces and disposed at positions corresponding to each of the second hinge plates.

The folding plate includes a first metal sheet on which a folding portion is formed, a second metal sheet and a third metal sheet joined to both sides of the first metal sheet, and the first shielding sheet and the second shielding sheet are digitizers. It may be disposed between and the first metal sheet or between the first metal sheet and the hinge portion. Here, the first metal sheet may be made of stainless steel.

The portable terminal of the present invention is disposed below the support plate and further includes a pair of magnets provided at positions facing each other in the folded state of the support plate, and the shielding sheet is disposed at a position corresponding to the pair of magnets. It may further include a third shielding sheet that shields the magnetic field generated from the pair of magnets.

The third shielding sheet may be made of a material with lower magnetic permeability than the first shielding sheet and the second shielding sheet.

The portable terminal of the present invention is disposed below the support plate and further includes a circuit board equipped with at least one sensor, and the shielding sheet is disposed at a position corresponding to the sensor to shield the magnetic field generated from the sensor. It may further include a shielding sheet.

The fourth shielding sheet may be made of a material with lower magnetic permeability than the first shielding sheet and the second shielding sheet.

The mobile terminal of the present invention is formed to have a thickness corresponding to the shielding sheet and may further include a height difference compensation sheet that compensates for the height difference caused by the shielding sheet.

The magnetic field shielding sheet for a portable terminal according to an embodiment of the present invention is a portable terminal including a digitizer, a folding plate disposed below the digitizer, and a support plate disposed below the folding plate and equipped with a hinge portion to enable folding and unfolding. A magnetic field shielding sheet for a terminal is provided with at least one shielding sheet that shields a magnetic field from a digitizer, and the shielding sheet may be disposed between the digitizer and the folding plate or between the folding plate and the support plate.

The shielding sheet may be a magnetic member with a saturation magnetic flux density (Bs) of 1.7T or more, and may be formed to have a thickness of 0.1 mm to 0.2 mm.

The shielding sheet may include silicon steel.

The shielding sheet may be a multilayer sheet in which a shielding layer containing silicon steel and at least one ribbon sheet layer of an amorphous alloy ribbon sheet and a nanocrystal grain alloy ribbon sheet are laminated.

In the present invention, the first shielding sheet and the second shielding sheet are disposed between the digitizer and the hinge portion to prevent the magnetic field generated from the hinge portion from affecting the digitizer and causing malfunction.

In addition, in the present invention, the first shielding sheet and the second shielding sheet have a saturation magnetic flux density (Bs) of 1.7T or more and are formed to a thickness of 0.1mm to 0.2mm or less, so that even if a large magnetic field is applied to the hinge portion from the outside, the first shielding sheet And the shielding properties of the second shielding sheet are not significantly reduced.

In addition, the present invention can improve the insufficient shielding performance of the polymer shielding sheet provided on the bottom of the existing digitizer by efficiently arranging a shielding sheet that can increase shielding performance at a specific location.

Figure 1 is a diagram illustrating an in-folding type foldable phone in which the display is folded inward around the vertical axis as an example of a portable terminal.
Figure 2 is a cross-sectional view showing a portable terminal according to an embodiment of the present invention.
FIG. 3 is an exploded cross-sectional view of the portable terminal of FIG. 2.
Figure 4 shows a magnetic field distribution diagram measured with the first and second shielding sheets containing silicon steel placed on the hinge portion, and a magnetic field distribution diagram measured with the Nd magnet applied to the first and second shielding sheets for 5 minutes and then removed. This is a diagram showing the magnetic field distribution.
Figure 5 is a plan view showing a support plate, a hinge part, a first shielding sheet, and a second shielding sheet in the mobile terminal of Figure 2.
Figure 6 is a cross-sectional view showing a modified example of a mobile terminal according to an embodiment of the present invention.
Figure 7 is an exploded cross-sectional view of a modified example of Figure 6.
Figure 8 is an exploded cross-sectional view of a portable terminal according to another embodiment of the present invention.
Figure 9 is a plan view showing a support plate, a hinge part, and first to fourth shielding sheets in the mobile terminal of Figure 8.
FIG. 10 is an exploded cross-sectional view of a modified example of the portable terminal of FIG. 8.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is a diagram illustrating an in-folding type foldable phone in which the display is folded inward around the vertical axis as an example of a portable terminal, FIG. 2 is a cross-sectional view showing a portable terminal according to an embodiment of the present invention, and FIG. 3 is an exploded cross-sectional view of the portable terminal of FIG. 2, and FIG. 4 is a plan view showing the housing, hinge portion, first shielding sheet, and second shielding sheet of the portable terminal of FIG. 2.

As shown in FIG. 1, the mobile terminal 100 according to an embodiment of the present invention has the left and right sides of the display 120 disposed on the front of the housing 110 folded inward around the vertical axis (a). This will be explained using a foldable phone as an example. The foldable phone may be equipped with an auxiliary display 121 that is visible in the folded state. The display 120 may be OLED. Meanwhile, the mobile terminal 100 according to an embodiment of the present invention is not limited to an in-folding type foldable phone, and may be a clamshell type flip phone that folds in the width direction.

Referring to FIGS. 2 and 3 , the portable terminal 100 may be provided with a digitizer 130 below the display 120 . Here, the digitizer 130 may be coupled to the bottom of the display 120 or disposed adjacent to it.

The digitizer 130 is a thin metal film that creates an electromagnetic field when electricity is passed through it. The electronic pen (not shown) is equipped with a micro-antenna coil at the end that generates an alternating magnetic field. Therefore, when the end of the electronic pen approaches the display 120, an electromagnetic induction phenomenon occurs and the electromagnetic field of the digitizer 130 disposed on the rear of the display 120 is deformed, and this deformation of the magnetic field causes the digitizer 130. It can be detected through a controller (not shown) to recognize the X, Y coordinates and the operation of the electronic pen.

Additionally, although not shown, the digitizer 130 may be provided with a thin polymer shielding sheet (not shown) on the entire lower surface. These polymer shielding sheets are mainly formed of a metal and polymer composite with a shielding function, but these shielding sheets have a problem in that their shielding performance is poor when shielding a magnetic field against a digitizer. On the other hand, the mobile terminal 100 according to an embodiment of the present invention can improve the insufficient shielding performance of the polymer shielding sheet provided on the bottom of the existing digitizer by efficiently arranging a shielding sheet that can increase shielding performance at a specific location. There is an advantage. The shielding sheet of the present invention will be described in detail below.

The folding plate 140 may include a first metal sheet 141, a second metal sheet 142, and a third metal sheet 143. The folding plate 140 may be in a form where the first metal sheet 141 connects the second metal sheet 142 and the third metal sheet 143. At this time, the upper surfaces of the first metal sheet 141, the second metal sheet 142, and the third metal sheet 143 may form the same plane.

The first metal sheet 141 is intended to perform a support function and a folding function of the display 11, and a mesh-shaped folding part 141a is formed in the center so that it can be folded or unfolded. . The first metal sheet 141 is made of a rigid metal material for elasticity and support functions. The folding portion 141a of the first metal sheet 141 may be formed by photo etching. In this case, the first metal sheet 141 is preferably made of stainless steel. This is because stainless steel is strong and has good etching properties.

Additionally, the folding plate 140 may have a flat second metal sheet 142 and a third metal sheet 143 bonded to both sides of the first metal sheet 141. The second metal sheet 142 and the third metal sheet 143 may be made of a copper alloy material with high strength and high heat dissipation, or may be made of a copper material.

In this way, the folding plate 140 can be easily folded or unfolded through the first metal sheet 141 on which the folding portion 141a is formed, and at the same time, it can be displayed through the second metal sheet 142 and the third metal sheet 143. 120 and the digitizer 130 can be supported to prevent wrinkles.

In this way, since the folding plate 140 is provided with the first metal sheet 141 made of stainless steel, when a magnetic field is generated by an external magnetic field, etc. in the first metal sheet 141 made of stainless material, this magnetic field is transmitted to the digitizer 130. may affect performance and reduce performance. Therefore, the first shielding sheet 10 and the second shielding sheet 20 are disposed between the digitizer 130 and the first metal sheet 141 or between the first metal sheet 141 and the hinge portion 160. desirable. That is, the first shielding sheet 10 and the second shielding sheet 20 may be arranged to minimize the magnetic field generated from the first metal sheet 141 made of stainless steel from affecting the digitizer 130. In addition, the first shielding sheet 10 and the second shielding sheet 20 are preferably disposed on both sides at a distance from the center of the folding part 141a so as not to interfere with the folding and unfolding operation of the folding part 141a. .

The portable terminal 100 may be provided with a support plate 170. The support plate 170 is disposed below the folding plate 140 and is provided with a hinge portion 160 to enable folding and unfolding.

The support plate 170 may include a first support plate 171 and a second support plate 172 disposed on both sides of the hinge portion 160.

The hinge portion 160 may include a first hinge plate 161 connected to the first support plate 171 and a second hinge plate 162 connected to the second support plate 172. Since the first and second hinge plates 161 and 162 are rotatably connected about the hinge axis 163, the first and second support plates 171 and 172 connected to the first and second hinge plates 161 and 162 are also hinged. By rotating around the axis 163, they can be in a folded or unfolded state facing each other.

In this way, the first hinge plate 161 and the second hinge plate 162 rotate around the hinge axis 163 while connected to the first and second support plates 171 and 172, so that the portion is in a folded or unfolded state. Therefore, it is important to ensure robustness and stability. Therefore, the first and second hinge plates 161 and 162 are preferably made of stainless steel, which is light in weight and has excellent rigidity.

However, when the magnetic field generated from the first and second hinge plates 161 and 162 made of stainless steel affects the digitizer 130, the performance of the digitizer 130 deteriorates. That is, the first and second hinge plates 161 and 162 are parts that rotate around the hinge axis 163 and repeat opposing folded and unfolded states, so they are magnetized and a magnetic field above a certain level is formed around the digitizer 130. You can. In addition, even when a large magnetic field such as an Nd magnet is applied to the hinge portion 160, the first and second hinge plates 161 and 162 may become magnetic and a magnetic field above a certain level may be formed around the digitizer 130. This magnetic field interferes with the interaction between the electronic pen and the digitizer 130, making it difficult to detect the exact location of the electronic pen, and the maximum distance that can recognize the approach of the electronic pen through interaction with the electronic pen is shortened, thereby preventing malfunction. wake up

Therefore, the magnetic field shielding sheet for a portable terminal according to an embodiment of the present invention is disposed at a position corresponding to the hinge portion 160 to prevent the magnetic field generated in the hinge portion 160 from affecting the digitizer 130. It may include a first shielding sheet 10 and a second shielding sheet 20.

Specifically, the first shielding sheet 10 and the second shielding sheet 20 are disposed at positions corresponding to the first hinge plate 161 and the second hinge plate 162, and are spaced apart from each other to the digitizer 130. It is possible to shield the magnetic field generated from the hinge portion 160.

As shown in FIGS. 2 and 3, the first shielding sheet 10 and the second shielding sheet 20 may be disposed between the folding plate 140 and the support plate 170. Here, the first and second shielding sheets 10 and 20 may be in the form of sheets that can be attached to the lower surface of the folding plate 140 using an adhesive layer (not shown). Additionally, the adhesive layer may be provided as an adhesive, tape, etc. applied to one or both sides of the first and second shielding sheets 10 and 20.

Since the folding plate 140 is disposed between the digitizer 130 and the support plate 170, the first and second shielding sheets 10 and 20 disposed between the folding plate 140 and the support plate 170 are supported. The magnetic field generated from the hinge portion 160 provided on the plate 170 can be blocked before it affects the digitizer 130.

Meanwhile, the height difference compensation sheet 30 is formed to have a thickness corresponding to the first shielding sheet 10 and the second shielding sheet 20, and is formed by the first shielding sheet 10 and the second shielding sheet 20. Height differences can be compensated.

Specifically, as shown in Figures 2 and 3, the folding plate 140 and the support plate 170 are spaced apart from each other by the thickness of the first shielding sheet 10 and the second shielding sheet 20. There is a height difference. Therefore, when the height difference compensation sheet 30 is provided, the height difference generated by the thickness of the first shielding sheet 10 and the second shielding sheet 20 can be compensated to prevent gaps between components. . This height difference compensation sheet 30 may be provided with tape or the like.

The first shielding sheet 10 and the second shielding sheet 20 may be provided with a magnetic member having a saturation magnetic flux density (Bs) of 1.7T or more. In this way, when the saturation magnetic flux density (Bs) of the first and second shielding sheets 10 and 20 is as high as 1.7T or more, magnetic saturation due to the magnetic field generated in the hinge portion 160 may occur late, which causes Therefore, compared to shielding sheets with low saturation magnetic flux density (Bs), it can be manufactured as a thin sheet with a thickness of 0.1 mm to 0.2 mm or less. If the thickness of the first shielding sheet 10 and the second shielding sheet 20 is less than 0.1 mm, the shielding characteristics may be reduced, and if the thickness exceeds 0.2 mm, it is difficult to manufacture the portable terminal 100 thinly. It is preferably formed to a thickness of 0.1 mm to 0.2 mm or less.

The first shielding sheet 10 and the second shielding sheet 20 may include silicon steel, which is a high magnetic permeability material. When the first shielding sheet 10 and the second shielding sheet 20 are formed including silicon steel, magnetic permeability for shielding a magnetic field may be increased.

Figure 4 shows a magnetic field distribution diagram (a) measured while the first and second shielding sheets 10 and 20 including silicon steel are placed on the hinge portion 160, and the first and second shielding sheets including silicon steel. This is a diagram showing the magnetic field distribution (b) measured when the Nd magnet was applied to the sheets 10 and 20 for 5 minutes and then removed.

As shown in Figure 4, the first and second shielding sheets 10 and 20 including silicon steel are formed with a thin thickness of 0.15 mm, and the magnetic field distribution diagram (a) before the Nd magnet is applied and the magnetic field distribution diagram (a) before the Nd magnet is applied The subsequent magnetic field distribution (b) did not change significantly. That is, it can be confirmed that the shielding properties of the first and second shielding sheets 10 and 20 according to the present invention are not significantly deteriorated even when a large external magnetic field such as an Nd magnet is applied.

Meanwhile, although not shown, the first shielding sheet 10 and the second shielding sheet 20 include a shielding layer (not shown) containing silicon steel, a ribbon sheet of an amorphous alloy, and a nano-crystal grain alloy. The ribbon sheets may be provided as a hybrid-type multilayer sheet in which at least one ribbon sheet layer (not shown) is laminated. Here, a ribbon sheet made of Fe-based nanocrystal grain magnetic alloy is used, or a ribbon sheet made of Fe-Si-B, Fe-Si-B-Co, Fe-Si-B-Cu-Nb, Fe-Zr-B, etc. An Fe-based amorphous alloy ribbon sheet with a composition may be used. Additionally, the multi-layer sheet may be a form in which a plurality of shielding layers and a plurality of ribbon sheet layers are stacked.

In the case of singly manufactured nanoribbons and iron-based ribbons, even if they are laminated, they have the disadvantage of reducing the volume compared to materials that can be manufactured to a certain thickness such as silicon steel, and the saturation magnetic flux density is also lower than that of the first and second shielding sheets (10) of the present invention. It is within the range of about 1.2T, which is lower than ,20). On the other hand, when the first and second shielding sheets 10 and 20 are provided as a multi-layer sheet in which a shielding layer containing silicon steel and a ribbon sheet layer are laminated, the shielding is better than a shielding sheet using a single nanoribbon or iron ribbon. There is no significant decline in the functionality of the characteristics.

Meanwhile, the first and second shielding sheets 10 and 20 may be formed of a material containing silicon steel, or may be formed of a multilayer sheet in which a shielding layer containing silicon steel and a ribbon sheet layer are laminated. However, the materials of the first and second shielding sheets 10 and 20 are not limited to this, and may be made of various materials that can be manufactured with a saturation magnetic flux density of 1.7T and a thickness of 0.1 mm to 0.2 mm or less.

Figure 5 is a plan view showing a housing, a hinge part, a first shielding sheet, and a second shielding sheet in the mobile terminal of Figure 2.

As shown in Figure 5, the first shielding sheet 10 and the second shielding sheet 20 may be arranged on both sides at a distance from the hinge axis 163. As an example, each of the first and second shielding sheets 10 and 20 is disposed on both sides with a gap of about 2 mm from the hinge axis 163 and is disposed between the first shielding sheet 10 and the second shielding sheet 20. A space of about 4 mm can be formed. This space is intended to prevent the first and second shielding sheets 10 and 20 from interfering with the folding and unfolding operations of the hinge portion 160 centered on the hinge axis 163.

Additionally, the first hinge plate 161 and the second hinge plate 162 may be provided in plural pieces at intervals along the longitudinal direction of the hinge axis 163. For example, as shown in FIG. 5 , a pair of the first hinge plate 161 and the second hinge plate 162 may be provided. In this way, when the first and second hinge plates 161 and 162 are provided in plural pieces, the first shielding sheet 10 is provided in plural pieces and disposed at positions corresponding to each of the first hinge plates 161, and the second A plurality of shielding sheets 20 may be provided and disposed at positions corresponding to each of the second hinge plates 162. That is, the plurality of first and second shielding sheets 10 and 20 may be arranged to prevent the magnetic field generated from the plurality of first and second hinge plates 161 and 162 from affecting the digitizer 130.

FIG. 6 is a cross-sectional view showing a modified example of a mobile terminal according to an embodiment of the present invention, and FIG. 7 is an exploded cross-sectional view showing a modified example of a mobile terminal according to an embodiment of the present invention.

As shown in FIGS. 6 and 7, the first shielding sheet 10, the second shielding sheet 20, and the height difference compensation sheet 30 can be disposed between the digitizer 130 and the folding plate 140. there is. Like the example shown in FIGS. 2 and 3, the first and second shielding sheets 10 and 20 may be in the form of a sheet that can be attached to the upper surface of the folding plate 140 by an adhesive layer (not shown), and compensate for the height difference. The sheet 30 may be provided so that a gap does not occur between the digitizer 130 and the folding plate 140.

Since the folding plate 140 is disposed between the digitizer 130 and the support plate 170, the first and second shielding sheets 10 and 20 disposed between the digitizer 130 and the folding plate 140 are the support plate. The magnetic field generated from the hinge portion 160 provided at 170 and the first metal sheet 141 of the folding plate 140 can be blocked before it affects the digitizer 130.

Hereinafter, a mobile terminal according to another embodiment of the present invention will be described with reference to FIGS. 8 to 10. For convenience of explanation, description of the same components as the embodiments shown in FIGS. 1 to 7 will be omitted, and the differences will be mainly described below.

As shown in FIGS. 8 and 9, the portable terminal 100' according to another embodiment of the present invention may have a pair of magnets m disposed at the lower part of the support plate 170'. The pair of magnets (m) are permanent magnets disposed in the edge area, and may be disposed at opposing positions when the support plate 170' is folded. That is, when the first support plate 171' and the second support plate 172' face each other, the pair of magnets m may be disposed at positions facing each other. In Figure 8, an example is shown in which a pair of magnets (m) are provided on a circuit board (c) to be described later, but the present invention is not limited thereto. For example, a pair of magnets (m) is provided on the first support plate 171'. and may be provided on the lower surface of the second support plate 172'. Additionally, the pair of magnets (m) may be formed in different sizes, as shown in FIGS. 8 to 10, or may be formed in the same size.

The attractive force between the pair of magnets (m) maintains the folded state in response to the elasticity of the folding plate 140' (restoring force to unfold the folding portion 141a' of the folding plate 140' in the folded state). You can. If the magnetic field generated from this pair of magnets (m) affects the digitizer 130, errors such as liquid crystal input recognition or frequency displacement may occur when inputting through an electronic pen. Accordingly, the portable terminal 100' according to another embodiment of the present invention may include a third shielding sheet 40' disposed at a position corresponding to the pair of magnets m. This third shielding sheet 40' can shield the digitizer 130 from the magnetic field generated from the pair of magnets (m). The third shielding sheet 40', like the first and second shielding sheets 10' and 20', is formed of a material containing silicon steel, or is a multilayer structure in which a shielding layer containing silicon steel and a ribbon sheet layer are laminated. It may be formed as a sheet, but the material of the third shielding sheet 40' is not limited thereto.

For example, the third shielding sheet 40' may have a magnetic permeability of 200, and the first and second shielding sheets 10' and 20' may be formed of a material having a magnetic permeability of 7000. That is, the third shielding sheet 40' may be made of a material with lower magnetic permeability than the first and second shielding sheets 10' and 20'.

Additionally, the mobile terminal 100' according to another embodiment of the present invention may have a circuit board (c) disposed below the support plate 170'. The circuit board (c) may be provided with at least one sensor (s). The portable terminal 100' may include a fourth shielding sheet 50' that shields the digitizer 130' from a magnetic field generated by at least one sensor s. The fourth shielding sheet 50' prevents the magnetic field generated from at least one sensor s from affecting the digitizer 130', thereby preventing errors caused by the magnetic field. The fourth shielding sheet 50', like the first and second shielding sheets 10' and 20', is formed of a material containing silicon steel, or is a multilayer structure in which a shielding layer containing silicon steel and a ribbon sheet layer are laminated. It may be formed as a sheet, but the material of the fourth shielding sheet 50' is not limited thereto.

For example, the fourth shielding sheet 50' may have a magnetic permeability of 2000, and the first and second shielding sheets 10' and 20' may be formed of a material having a magnetic permeability of 7000. That is, the fourth shielding sheet 50' may be made of a material with lower magnetic permeability than the first and second shielding sheets 10' and 20'.

Meanwhile, the height difference compensation sheet 30' has a thickness corresponding to the first shielding sheet 10', the second shielding sheet 20', the third shielding sheet 40', and the fourth shielding sheet 50'. It is formed and may be provided to compensate for the height difference caused by the first to fourth shielding sheets (10', 20', 40', and 50').

In this way, when the height difference compensation sheet 30' is provided, the height difference generated by the thickness of the first to fourth shielding sheets 10', 20', 40', and 50' is compensated to reduce the gap between the components. You can prevent this from happening. This height difference compensation sheet 30' may be provided with tape or the like.

Additionally, the portable terminal 100' according to another embodiment of the present invention may be provided with a housing 110' covering the outside of the circuit board (c). The housing 110' may include a first housing 111' and a second housing 112' that can be folded and unfolded.

FIG. 10 is an exploded cross-sectional view of a modified example of the portable terminal of FIG. 8.

As shown in FIG. 10, the first to fourth shielding sheets 10', 20', 40', and 50' and the height difference compensation sheet 30' are connected to the digitizer 130' and the folding plate 140'. It can be placed in between. Since the folding plate 140' is disposed between the digitizer 130' and the support plate 170', the first to fourth shielding sheets 10' are disposed between the digitizer 130' and the folding plate 140'. , 20', 40', and 50' are the magnetic field generated from the hinge portion 160', the first metal sheet 141', a pair of magnets (m), and at least one sensor (s) of the digitizer (130). ) can block the magnetic field before it affects the field.

The best embodiments of the present invention are disclosed in the drawings and specification. Here, specific terms are used, but they are used only for the purpose of describing the present invention and are not used to limit the meaning or scope of the present invention described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent embodiments of the present invention are possible therefrom. Therefore, the true technical scope of the present invention should be determined by the technical spirit of the attached claims.

10,10': 1st shielding sheet 20,20': 2nd shielding sheet
100,100': Mobile terminal 110,110': Housing
111,111': first housing 112,112': second housing
120,120': Display 121: Secondary display
130,130': Digitizer 140,140': Folding plate
151,151': first magnet 152,152': second magnet
160,160': Hinge portion 161,161': First hinge plate
162,162': second hinge plate 163,163': hinge axis
170,170': support plate 171,171': first support plate
172,172': second support plate

Claims (17)

A portable terminal including a digitizer, a folding plate disposed below the digitizer, and a support plate disposed below the folding plate and equipped with a hinge portion and capable of being folded and unfolded,
Equipped with at least one shielding sheet that shields the digitizer from a magnetic field,
The shielding sheet is disposed between the digitizer and the folding plate or between the folding plate and the support plate,
The hinge part is,
It includes a first hinge plate and a second hinge plate respectively connected to both sides of the hinge axis and rotatable about the hinge axis,
The at least one shielding sheet,
It includes a first shielding sheet and a second shielding sheet disposed at positions corresponding to the first hinge plate and the second hinge plate, respectively,
The first shielding sheet and the second shielding sheet are arranged on both sides at a distance from the hinge axis and spaced apart from each other,
The first shielding sheet has an area corresponding to the first hinge plate, and the second shielding sheet has an area corresponding to the second hinge plate. delete According to paragraph 1,
The support plate includes a first support plate and a second support plate disposed on both sides of the hinge portion,
The first support plate is connected to the first hinge plate, and the second support plate is connected to the second hinge plate. delete According to paragraph 1,
The first hinge plate and the second hinge plate are provided in plural pieces at intervals along the longitudinal direction of the hinge axis,
The first shielding sheet is provided in plural pieces and disposed at positions corresponding to each of the first hinge plates, and the second shielding sheet is provided in plural pieces and disposed at positions corresponding to each of the second hinge plates. According to paragraph 1,
The folding plate is,
A first metal sheet having a folding portion formed thereon; and
It includes a second metal sheet and a third metal sheet joined to both sides of the first metal sheet,
The first shielding sheet and the second shielding sheet are disposed between the digitizer and the first metal sheet or between the first metal sheet and the hinge portion. According to clause 6,
The first metal sheet is a portable terminal made of stainless steel. According to paragraph 1,
It is disposed below the support plate and further includes a pair of magnets provided at positions facing each other in a folded state of the support plate,
The shielding sheet is,
A mobile terminal further comprising a third shielding sheet disposed at a position corresponding to the pair of magnets to shield the magnetic field generated from the pair of magnets. According to clause 8,
The third shielding sheet is a mobile terminal made of a material with lower magnetic permeability than the first shielding sheet and the second shielding sheet. According to paragraph 1,
It is disposed below the support plate and further includes a circuit board equipped with at least one sensor,
The shielding sheet is,
A mobile terminal further comprising a fourth shielding sheet disposed at a position corresponding to the sensor to shield the magnetic field generated from the sensor. According to clause 10,
The fourth shielding sheet is a mobile terminal made of a material with lower magnetic permeability than the first shielding sheet and the second shielding sheet. According to paragraph 1,
A mobile terminal further comprising a height difference compensation sheet formed to a thickness corresponding to the shielding sheet and compensating for a height difference caused by the shielding sheet. A magnetic field shielding sheet for a portable terminal including a digitizer, a folding plate disposed below the digitizer, and a support plate disposed below the folding plate and equipped with a hinge portion and capable of being folded and unfolded,
It is provided with at least one shielding sheet that shields the digitizer from a magnetic field,
The shielding sheet is disposed between the digitizer and the folding plate or between the folding plate and the support plate,
The hinge part is,
It includes a first hinge plate and a second hinge plate respectively connected to both sides of the hinge axis and rotatable about the hinge axis,
The at least one shielding sheet,
It includes a first shielding sheet and a second shielding sheet disposed at positions corresponding to the first hinge plate and the second hinge plate, respectively,
The first shielding sheet and the second shielding sheet are arranged on both sides at a distance from the hinge axis and spaced apart from each other,
The first shielding sheet has an area corresponding to the first hinge plate, and the second shielding sheet has an area corresponding to the second hinge plate. According to clause 13,
The shielding sheet is a magnetic field shielding sheet for a portable terminal that is a magnetic member with a saturation magnetic flux density (Bs) of 1.7T or more. According to clause 13,
The shielding sheet is a magnetic field shielding sheet for a portable terminal formed to a thickness of 0.1mm to 0.2mm. According to clause 13,
The shielding sheet is a magnetic field shielding sheet for a mobile terminal containing silicon steel. According to clause 13,
The shielding sheet is,
A magnetic field shielding sheet for a portable terminal, which is a multilayer sheet in which a shielding layer containing silicon steel and at least one ribbon sheet layer of an amorphous alloy ribbon sheet and a nanocrystal grain alloy ribbon sheet are laminated.

Images