Wireless Power Transmission Device and System

Abstract

A wireless power transmission device and system. The wireless power transmission device includes a substrate, a feeder layer, and a dielectric resonator assembly. The feeder layer is formed on the substrate, and the feeder layer is formed with a signal feeding portion and an antenna portion. Among them, the signal feeding portion is used to introduce a power transmission signal and the antenna portion excites the power transmission signal. The dielectric resonator assembly is disposed on the feeder layer, and the dielectric resonator assembly covers the antenna portion.

Description

Technical Field

[0001] The present invention relates to a wireless power transmission device and system, and particularly to a wireless power transmission device and system for wireless charging. Background Art

[0002] At present, mobile devices (such as mobile phones or wireless earphones, etc.) already use wireless charging systems for charging. Existing wireless charging systems include a mobile device at the energy receiving end and a wireless charging board at the energy sending end. Corresponding charging coils are provided in both the mobile device and the wireless charging board for wireless charging.

[0003] However, in existing wireless charging systems, the mobile device must be precisely placed at a fixed position on the wireless charging board. Otherwise, the charging coil of the mobile device cannot be successfully paired with the charging coil of the wireless charging board, resulting in the inability to charge. Therefore, how to provide a wireless power transmission device and system that can perform wireless charging without precise placement has become an urgent issue in the industry. Summary of the Invention

[0004] To solve the various problems of the foregoing prior art, an object of the present invention is to provide a wireless power transmission device and system that can perform wireless charging without precise placement.

[0005] To achieve the foregoing object, the wireless power transmission device of the present invention includes a substrate, a feeder layer, and a dielectric resonator assembly. The feeder layer is formed on the substrate, and the feeder layer is formed with a signal feeding portion and an antenna portion. Among them, the signal feeding portion is used to introduce a power transmission signal and the antenna portion excites the power transmission signal. The dielectric resonator assembly is disposed on the feeder layer, and the dielectric resonator assembly covers the antenna portion.

[0006] In an embodiment of the present invention, the light transmittance of the substrate is between 50% and 95%.

[0007] In an embodiment of the present invention, the light transmittance of the feeder layer is between 50% and 95%.

[0008] In an embodiment of the present invention, the light transmittance of the dielectric resonator assembly is between 50% and 95%.

[0009] In an embodiment of the present invention, the substrate is made of glass, crystal glass, or acrylic material.

[0010] In an embodiment of the present invention, the feeder layer is made of a metal grid, ITO, graphene thin film, or thin metal sputtering material.

[0011] In an embodiment of the present invention, the dielectric resonator assembly is made of glass, crystal glass, or acrylic material.

[0012] In an embodiment of the present invention, the signal feeding portion further includes a first slot and a second slot, and the first slot and the second slot form a symmetric structure.

[0013] In an embodiment of the present invention, the antenna portion further includes a third slot and a fourth slot, and the third slot and the fourth slot form a symmetric structure.

[0014] In an embodiment of the present invention, the first slot, the second slot, the third slot, and the fourth slot are rectangular structures, and the first slot is orthogonal to the third slot, and the second slot is orthogonal to the fourth slot.

[0015] In an embodiment of the present invention, the dielectric resonator assembly is a cube, a cuboid, a cylinder, a semi-cylinder, a hollow cuboid, or a hollow cylinder.

[0016] In an embodiment of the present invention, the contact surrounding area between the dielectric resonator assembly and the feeder layer is rectangular or circular.

[0017] In an embodiment of the present invention, the antenna portions of the first slot and the second slot substantially correspond to the central position of the contact surrounding area between the dielectric resonator assembly and the feeder layer.

[0018] In an embodiment of the present invention, the dielectric constant of the dielectric resonator assembly is between 2 and 10.

[0019] The present invention also provides a wireless power transmission system, including: the wireless power transmission device according to any one of the embodiments of the present invention; and a power supply device, coupled to the signal feeding portion, for transmitting a power transmission signal to the signal feeding portion.

[0020] In an embodiment of the present invention, the wireless power transmission system further includes: an energy receiving device, coupled to the wireless power transmission device, and charged through the electromagnetic field generated by the wireless power transmission device.

[0021] Compared with the prior art, the wireless power transmission device of the present invention forms a signal feeding portion and an antenna portion on the feeder layer to constitute a coplanar waveguide (CPW) for introducing a power transmission signal and exciting an electromagnetic field, and further adjusts the electric field radiation gain pattern through the dielectric resonator assembly, so that the region with higher gain is concentrated in the upper space of the substrate. Therefore, as long as the energy receiving device is placed above the wireless power transmission device, wireless charging can be performed, and there is no need to pair coils as in the prior art. In addition, the substrate, the feeder layer, and the dielectric resonator assembly of the substrate can all be made of light-transmitting materials, which is not only more beautiful but also has great flexibility in the appearance design. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the wireless power transmission device according to the first embodiment of the present invention.

[0023] Figure 2 It is a top - view schematic diagram of the wireless power transmission device according to the second embodiment of the present invention.

[0024] Figure 3 It is a schematic diagram of the antenna radiation gain field pattern of a general coplanar waveguide.

[0025] Figure 4 It is a schematic diagram of the antenna radiation gain field pattern of a coplanar waveguide with a dielectric resonator component.

[0026] Figure 5 It is a schematic structural diagram of the wireless power transmission system according to the third embodiment of the present invention.

[0027] Symbol description:

[0028] 1 Wireless power transmission device

[0029] 10 Substrate

[0030] 11 Feeder layer

[0031] 110 Signal feeding part

[0032] 110a First slot

[0033] 110b Second slot

[0034] 111 Antenna part

[0035] 111a Third slot

[0036] 111b Fourth slot

[0037] 12 Dielectric resonator component

[0038] 2 Power supply device

[0039] 3 Energy receiving device

[0040] A Angle Detailed implementation manners

[0041] The following explains the implementation manners of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments.

[0042] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for the understanding and reading of those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "inner", "outer", "bottom", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented. This is stated first for clarification.

[0043] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the wireless power transmission device according to the first embodiment of the present invention. As shown in the figure, the wireless power transmission device 1 of the present invention includes a substrate 10, a feeder layer 11, and a dielectric resonator component 12. The feeder layer 11 is formed on the substrate 10, and the feeder layer 11 is relatively thin with respect to the substrate 10. The feeder layer 11 is formed with a signal feeding portion 110 and an antenna portion 111 (shown by dotted circles respectively), wherein the signal feeding portion 110 is used to introduce a power transmission signal and the antenna portion 111 excites the power transmission signal.

[0044] The dielectric resonator component 12 is disposed on the feeder layer 11. In this embodiment, the dielectric resonator component 12 is a cuboid, and in other embodiments, the dielectric resonator component 12 can be other shapes. The dielectric resonator component 12 covers the antenna portions 110b, 111b of the first slot 110 and the second slot 111, and can also cover part of the hollow portions 110a, 111a.

[0045] In one embodiment, in addition to forming the feeder layer 11, the substrate 10 may further include an adhesive or an adhesive layer (such as an optical adhesive or an OCA adhesive) for bonding, and a protective layer (such as PET / PI), a UV adhesive, etc. for protection, but not limited thereto.

[0046] In one embodiment, the feeder layer 11 is made of a conductive material, and the regions of the signal feeding portion 110 and the antenna portion 111 (which may include the periphery) are electrically active regions to form a coplanar waveguide. One end of the signal feeding portion 110 is disposed at the edge of the feeder layer 11. The signal feeding portion 110 is used to introduce a power transmission signal and the antenna portion 111 excites the power transmission signal to generate an electromagnetic field. In a further embodiment, the regions other than the signal feeding portion 110 and the antenna portion 111 in the feeder layer 11 can be used as non-electrically active regions.

[0047] Please refer to Figure 2 , Figure 2It is a top view schematic diagram of the wireless power transmission device according to the second embodiment of the present invention. In one embodiment, the signal feeding part 110 may further include a first slot 110a and a second slot 110b, and the first slot 110a and the second slot 110b form a symmetric structure with each other.

[0048] In one embodiment of the present invention, the antenna part 111 may further include a third slot 111a and a fourth slot 111b, and the third slot 111a and the fourth slot 111b form a symmetric structure with each other.

[0049] In one embodiment, the first slot 110a, the second slot 110b, the third slot 111a and the fourth slot 111b are rectangular structures, but not limited thereto. The first slot 110a is orthogonal to the third slot 111a, and the second slot 110b is orthogonal to the fourth slot 111b. The first slot 110a, the second slot 110b, the third slot 111a and the fourth slot 111b can be formed by hollowing out or etching the feeder layer 11, and the power transmission signal is transmitted by the conductive feeder layer 11 at the edges of the first slot 110a, the second slot 110b, the third slot 111a and the fourth slot 111b.

[0050] Although in the same area, when the intersection angle A between the first slot 110a and the third slot 111a is 90 degrees, there is a better effect, but in other embodiments, the intersection angle A between the first slot 110a and the third slot 111a can also be any angle between 0 degrees and 180 degrees. Due to symmetry, the intersection angle between the second slot 110b and the fourth slot 111b is equal to A.

[0051] In one embodiment, the lengths of the third slot 111a and the fourth slot 111b of the antenna part 111 can be adjusted according to the guided wavelength.

[0052] In one embodiment, the dielectric resonator component 12 can also be a cube, a cuboid, a cylinder, a semi-cylinder, a hollow cuboid or a hollow cylinder, but not limited thereto. Figure 2 The dielectric resonator component 12 in is a solid cylinder (only the top view above is shown). The coplanar waveguide formed by the dielectric resonator component 12 and the feeder layer 11 further forms a dielectric resonator antenna, which can generate an electromagnetic field in the TE11 mode and enhance the radiation gain, so that the area with higher gain is concentrated in the space above the substrate 10. Therefore, as long as the energy receiving device is placed above the wireless power transmission device 1 of the present invention, wireless charging can be carried out, and the placement angle of the energy receiving device is not limited, and multiple energy receiving devices can be charged simultaneously.

[0053] In one embodiment, the contact surrounding area between the dielectric resonator component 12 and the feeder layer 11 is rectangular (when the dielectric resonator component 12 is a cube, cuboid, semi-cylinder, hollow cuboid, etc.) or circular (when the dielectric resonator component 12 is a cylinder, hollow cylinder, etc.).

[0054] In one embodiment, the antenna portion 111 substantially corresponds to the central position of the contact surrounding area between the dielectric resonator component 12 and the feeder layer 11, so that better radiation gain can be obtained.

[0055] Please refer to Figure 3 , Figure 3 is a schematic diagram of the antenna radiation gain field pattern of a general coplanar waveguide. As shown in the figure, for a general coplanar waveguide (such as the coplanar waveguide formed by the feeder layer 11 with the signal feeding portion 110 and the antenna portion 111 of the present invention), if it does not have a dielectric resonator component, the regions with higher antenna radiation gain field pattern gain are scattered in the spaces on the upper and lower sides of the substrate, and the gain is lower (in this embodiment, MAX = 0.2 dB).

[0056] Please refer to Figure 4 , Figure 4 is a schematic diagram of the antenna radiation gain field pattern of a coplanar waveguide with a dielectric resonator component. As shown in the figure, if a dielectric resonator component (such as the dielectric resonator component 12 of the present invention) is added above the substrate of the Figure 3 coplanar waveguide, the regions with higher antenna radiation gain field pattern gain are concentrated in the space above the substrate, and the gain is higher (in this embodiment, MAX = 5.6 dB). Therefore, as long as the energy receiving device is roughly placed in the region with higher gain, wireless charging can be carried out, which is more flexible and convenient in use.

[0057] In one embodiment, the light transmittance of the substrate 10 can be between 50% and 95%. The light transmittance of the feeder layer 11 can be between 50% and 95%. The light transmittance of the dielectric resonator component 12 can be between 50% and 95%. The light transmittances of the substrate 10, the feeder layer 11, and the dielectric resonator structure 12 can be the same or different, and the present invention does not limit this. The design with a light transmittance between 50% and 95% is not only more aesthetically pleasing but also provides great flexibility for the external design. In addition, if the power supply device of the wireless power transmission device 1 is a device using photoelectric conversion, the light-transmitting design will not block the light source.

[0058] In one embodiment, the substrate 10 is made of glass, crystal glass, or acrylic material, but is not limited thereto.

[0059] In one embodiment, the feeder layer 11 is composed of a metal grid, ITO, graphene thin film, or thin metal sputtering material. A material with a sheet resistance less than 2 ohm is preferred, but not limited thereto. The metal grid can be, for example, silver nanowires or copper wires. To maintain a consistent light transmittance of the feeder layer 11 in terms of overall visual appearance, metal grids in different regions (such as the electrical action region and the non-electrical action region) can have different spacings.

[0060] In one embodiment, the dielectric resonator component 12 is composed of glass, crystal glass, or acrylic material, but not limited thereto. In addition, the dielectric constant of the dielectric resonator component 12 can be between 2 and 10, but not limited thereto. Since the dielectric constant of the material affects the thickness of the dielectric resonator component 12, materials within this dielectric constant range have better thickness and light transmittance.

[0061] Please refer to Figure 5 , Figure 5 which is a schematic structural diagram of the wireless power transmission system according to the third embodiment of the present invention. The present invention also provides a wireless power transmission system, including: the wireless power transmission device 1 described in any one of the embodiments of the present invention and a power supply device 2. The power supply device 2 is coupled to the hollow portions 110a and 111a of the first slot 110 and the second slot 111 to supply the power required for the operation of the wireless power transmission device 1.

[0062] In one embodiment, the wireless power transmission system further includes an energy receiving device 3. The energy receiving device 3 is coupled to the wireless power transmission device 1 and is charged through the electromagnetic field generated by the wireless power transmission device 1. There is no need for a wired connection between the wireless power transmission device 1 and the energy receiving device 3 through wires or other conductive materials, and the placement angle of the energy receiving device 3 is not restricted. Multiple energy receiving devices 3 can also be charged simultaneously.

[0063] In one embodiment, the power supply device 2 can include components such as a radio frequency signal source (RF System) and a power amplifier (PA). The energy receiving device 3 can be a mobile phone, a remote control, a wearable device, etc., but not limited thereto. The energy receiving device 3 can also include components such as rectifiers, a charging circuit (boost charger), and a battery.

[0064] In summary, the wireless power transmission device of the present invention forms a signal feeding portion and an antenna portion on the feeder layer to constitute a coplanar waveguide (CPW), so as to introduce a power transmission signal and excite an electromagnetic field, and further adjusts the electric field radiation gain pattern through the dielectric resonance component, so that the region with higher gain is concentrated in the upper space of the substrate. Therefore, as long as the energy receiving device is placed above the wireless power transmission device, wireless charging can be carried out, and there is no need to pair coils as in the prior art. In addition, the substrate, the feeder layer, and the dielectric resonance component of the substrate can all be made of light-transmitting materials, which is not only more beautiful but also has great flexibility in the external design.

[0065] Through the description of the above preferred specific embodiments, those with ordinary knowledge in the art should be able to more clearly understand the features and spirit of the present invention. However, the above embodiments are only used to illustrate the principle and its effects of the present invention, rather than to limit the present invention. Therefore, any modification and change to the above embodiments still do not depart from the spirit of the present invention, and the scope of the rights of the present invention should be as listed in the claims.

Claims

1. A wireless power transmission device, characterized in that, the device includes: a substrate; a feeder layer formed on the substrate, and a signal feeding portion and an antenna portion are formed on the feeder layer, wherein the signal feeding portion is used to introduce a power transmission signal and the antenna portion excites the power transmission signal; and a dielectric resonator assembly disposed on the feeder layer, and the dielectric resonator assembly covers the antenna portion; wherein, the dielectric resonator assembly is used to adjust the electric field radiation gain pattern so that the region with higher gain is concentrated in the space above the substrate; wherein, the signal feeding portion includes a first slot and a second slot, and the first slot and the second slot form a symmetric structure; the antenna portion includes a third slot and a fourth slot, and the third slot and the fourth slot form a symmetric structure.

2. The wireless power transmission device according to claim 1, characterized in that, the light transmittance of the substrate is between 50% and 95%.

3. The wireless power transmission device according to claim 1, characterized in that, the light transmittance of the feeder layer is between 50% and 95%.

4. The wireless power transmission device according to claim 1, characterized in that, the light transmittance of the dielectric resonator assembly is between 50% and 95%.

5. The wireless power transmission device according to claim 1, characterized in that, the substrate is made of glass, crystal glass or acrylic material.

6. The wireless power transmission device according to claim 1, characterized in that, the feeder layer is made of metal grid, ITO, graphene thin film or thin metal sputtering material.

7. The wireless power transmission device according to claim 1, characterized in that, the dielectric resonator assembly is made of glass, crystal glass or acrylic material.

8. The wireless power transmission device according to claim 1, characterized in that, the first slot, the second slot, the third slot and the fourth slot are rectangular structures, and the first slot is orthogonal to the third slot, and the second slot is orthogonal to the fourth slot.

9. The wireless power transmission device according to claim 1, characterized in that, the dielectric resonator assembly is a cube, a cuboid, a cylinder, a semi-cylinder, a hollow cuboid or a hollow cylinder.

10. The wireless power transmission device according to claim 1, characterized in that, the contact surrounding area between the dielectric resonator assembly and the feeder layer is rectangular or circular.

11. The wireless power transmission device according to claim 10, characterized in that, the antenna portion substantially corresponds to the center position of the contact surrounding area between the dielectric resonator assembly and the feeder layer.

12. The wireless power transmission device according to claim 1, characterized in that, the dielectric constant of the dielectric resonator assembly is between 2 and 10.

13. A wireless power transmission system, characterized in that, the system includes: the wireless power transmission device according to any one of claims 1 to 12; and a power supply device coupled to the signal feeding portion for sending the power transmission signal to the signal feeding portion.

14. The wireless power transmission system according to claim 13, characterized in that, the system further includes: an energy receiving device coupled to the wireless power transmission device and charged through the electromagnetic field generated by the wireless power transmission device.

Images