Electronic device

Abstract

This application discloses an electronic device belonging to the field of communication technology. The electronic device includes a rollable screen, which comprises a roll and a flexible screen wound around the roll; an antenna wound around the roll; and a shaft assembly fitted onto the antenna, the shaft assembly having a different dielectric constant than the roll; during the process of the rollable screen switching between an unfolded state and a retracted state, the position of the shaft assembly on the antenna changes.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and specifically relates to an electronic device. Background Technology

[0002] With the development of electronic technology, the screen forms of mobile phones and other electronic devices are constantly changing, from traditional flip screens to smart straight screens, curved screens, waterfall screens, and then to foldable screens and rollable screens, thereby achieving seamless switching between screens and bringing users a brand-new experience.

[0003] The emergence of rollable screens poses a significant challenge to the antenna layout of electronic devices. Unlike the antenna layout of traditional full-screen phones, rollable screen phones not only need to address the problem of insufficient antenna clearance caused by the phone's structure, but also need to consider the usage states during the unfolding and rolling processes. In the design of the antenna for rollable screen phones, compared to the form of a single antenna, multiple structural states and antenna performance issues need to be considered.

[0004] The problem that needs to be solved now is how to ensure antenna performance while reducing the need for additional antenna design in multiple structural states. Summary of the Invention

[0005] The purpose of this application is to provide an electronic device that can solve the problem of balancing antenna performance and antenna design difficulty in existing rollable screen electronic devices under multiple structural states.

[0006] In a first aspect, embodiments of this application provide an electronic device, including:

[0007] A rollable screen, comprising a roll and a flexible screen wound around the roll;

[0008] Antenna, which is wound around the spool;

[0009] A shaft assembly, which is fitted onto the antenna, has a different dielectric constant than the reel;

[0010] During the process of switching between the unfolded and retracted states of the roll-up screen, the position of the shaft assembly on the antenna changes.

[0011] In this embodiment, the electronic device includes a rollable screen, an antenna, and a shaft assembly. The rollable screen includes a spool and a flexible screen wound around the spool. The antenna is wound around the spool. The shaft assembly is fitted onto the antenna, and the dielectric constant of the shaft assembly is different from that of the spool. Through the above structural arrangement, the position of the shaft assembly on the antenna changes during the switching between the rollable screen's unfolded and retracted states. Thus, by rotating the spool, which serves as the primary medium of the antenna, the shaft assembly, which serves as the secondary medium of the antenna, is loaded to different positions on the antenna, changing the wavelength of the antenna and thus changing the antenna's radiation direction. Under the premise of simple antenna design, the antenna performance of the rollable screen electronic device in both the unfolded and retracted states can be guaranteed. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the electronic device in the retracted state according to an embodiment of this application;

[0013] Figure 2 This is a schematic diagram of the structure of the electronic device in the unfolded state according to an embodiment of this application;

[0014] Figure 3 This is one of the schematic diagrams of an antenna structure on an electronic device according to an embodiment of this application;

[0015] Figure 4 This is a second schematic diagram of the antenna structure on the electronic device according to an embodiment of this application;

[0016] Figure 5 This is the third schematic diagram of the antenna structure on the electronic device according to an embodiment of this application;

[0017] Figure 6 This is a schematic diagram of a helical antenna.

[0018] Figure 7 This is a schematic diagram of the radiation characteristics of a helical antenna. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0021] The electronic device provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0022] like Figures 1-5 As shown, this application provides an electronic device, including: a rollable screen, which includes a roll 1 and a flexible screen 2 wound around the roll 1; an antenna 3, which is wound around the roll 1; and a shaft kit 4, which is sleeved on the antenna 3, and the dielectric constant of the shaft kit 4 is different from that of the roll 1; the position of the shaft kit 4 on the antenna 3 changes during the process of the rollable screen switching between an unfolded state and a retracted state.

[0023] It should be noted that, in some embodiments, the flexible screen 2 in the rollable screen can be wound around the roll 1, and the flexible screen 2 can be stretched or contracted by rotating the roll 1.

[0024] In some embodiments, the scroll 1 can be positioned on the side of the fully opened flexible screen 2. For example, the scroll 1 can be positioned on the fully opened left side, and the flexible screen 2 can retract to the left and wrap around the scroll 1 or extend to the right until it is fully opened.

[0025] It should be noted that the rollable screen is in the retracted (rolled-up) state (see...). Figure 1 The unfolded area under the condition of unfolding is smaller than that under the unfolded state (see...). Figure 2 The unfolded area under )

[0026] Here, antenna 3 is wound around spool 1, and spool 4 is fitted onto antenna 3. That is, antenna 3 is located between spool 1 and spool 4. Here, spool 1 serves as the primary medium of antenna 3, and spool 4 serves as the secondary medium of antenna 3.

[0027] Optionally, antenna 3 is a helical antenna.

[0028] See Figure 6 and Figure 7 This illustrates the radiation characteristics of a helical antenna. The ratio of the diameter D of the helical antenna to its wavelength λ determines the direction of maximum radiation of the helical antenna. Figure 7 The helical antenna in (a) has side-firing radiation characteristics, with D / λ < 1.8; Figure 7The helical antenna in (b) has end-fire radiation characteristics, with D / λ = 0.25–0.46; Figure 7 The spiral antenna in (c) has conical radiation characteristics, with D / λ > 0.46.

[0029] For helical antennas, at the same operating frequency, the wavelength is inversely proportional to the relative permittivity; the larger the relative permittivity, the smaller the wavelength required.

[0030] Therefore, this embodiment of the invention utilizes the radiation characteristics of a helical antenna. By rotating the spool, which serves as the primary medium of the antenna, the shaft assembly, which serves as the secondary medium of the antenna, is loaded to different positions of the antenna, thereby changing the wavelength of the antenna and thus changing the radiation direction of the antenna. Under the premise of simple antenna design, it can also ensure the antenna performance of the rollable screen electronic device in both the unfolded and retracted states.

[0031] Optionally, the operating frequency band of antenna 3 is switched during the process of switching between the unfolded and retracted states of the roll-up screen.

[0032] It should be understood that this embodiment of the invention utilizes the radiation characteristics of a helical antenna. By rotating the spool, which serves as the primary medium of the antenna, the shaft assembly, which serves as the secondary medium, is loaded to different positions on the antenna, thus changing the antenna's wavelength. The change in wavelength corresponds to a change in the operating frequency band. In other words, the operating frequency band of antenna 3 switches during the switching between the unfolded and retracted states of the rollable screen. Here, by switching the operating frequency band of antenna 3, the antenna performance requirements of the electronic device with the rollable screen can be met under different structural states (unfolded and retracted), ensuring the antenna performance of the rollable screen electronic device in both unfolded and retracted states.

[0033] In an alternative embodiment, the outer surface of the spool 1 has threads; the spool assembly 4 is cylindrical, the inner surface of the spool assembly 4 has threads, and the spool assembly 4 is threadedly connected to the antenna 3.

[0034] It should be noted that the antenna 3 is wound around the spool 1. Specifically, part of the antenna 3 is embedded in the groove of the thread on the outer surface of the spool 1, and part of it protrudes and is threaded to the inner surface of the shaft assembly 4.

[0035] Thus, as the spool 1 rotates, the antenna 3 rotates with the spool 1, and the antenna 3 pushes the thread on the inner surface of the shaft assembly 4 to move up and down along the axis of the spool 1, so that the position of the shaft assembly 4 on the antenna 3 changes.

[0036] It should be understood that the threads on the inner surface of the shaft assembly 4 form a bolt and nut structure with the antenna 3. The principle is similar to that of a bolt and nut: clockwise rotation tightens and counterclockwise rotation loosens. See [link to relevant documentation]. Figure 4 As shown.

[0037] This implementation method, by designing threads on the scroll 1 and the shaft assembly 4 themselves, and referring to the relationship principle of bolts and nuts, can realize the change of position of the shaft assembly 4 on the antenna 3 without adding any additional components, thus simplifying the antenna design of electronic devices with scroll screens.

[0038] Further, see Figure 3 Antenna 3 includes a first helical antenna 31 and a second helical antenna 32; spool 1 includes a first spool portion 11 and a second spool portion 12, the first spool portion 11 and the second spool portion 12 are coaxially connected, and the diameter of the first spool portion 11 is different from the diameter of the second spool portion 12.

[0039] The first helical antenna 31 is wound around the first spool portion 11, the second helical antenna 32 is wound around the second spool portion 12, and the shaft assembly 4 is threadedly connected to the helical antenna corresponding to the spool portion with the larger diameter.

[0040] Correspondingly, when the spool 1 rotates, the first helical antenna 31 and the second helical antenna 32 both rotate with the spool 1. The helical antenna corresponding to the larger diameter spool part pushes the thread on the inner surface of the shaft assembly 4 to move up and down, and the position of the shaft assembly 4 switches between the first helical antenna 31 and the second helical antenna 32.

[0041] It should be noted that the above settings enable the switching of the operating frequency band of the first spiral antenna 31 and the second spiral antenna 32 in different structural states of the electronic device with the rollable screen. In this way, the antenna of the electronic device with the rollable screen can support multiple frequency bands to cope with different usage scenarios and improve the user experience.

[0042] Based on this, a specific feasible method is shown below, in which the diameter of the first spool portion 11 is smaller than the diameter of the second spool portion 12, and the dielectric constant of the spool 1 is smaller than the dielectric constant of the shaft assembly 4.

[0043] It should be noted that when radio waves pass through a material with a low dielectric constant, their wavelength will increase. Therefore, using an antenna material with a low dielectric constant can increase the antenna electrical length required for resonance. Based on this, in this embodiment, the dielectric constant of the spool 1 is low. The main purpose is to construct a threaded structure on the outer surface of the spool 1 without reducing the antenna electrical length, so that the antenna can be wound in the threaded structure, that is, to embed a part of the antenna into the groove of the thread.

[0044] In the case where the rollable screen is in a retracted state, the shaft assembly 4 is fitted onto the second helical antenna 32. The diameter of the second helical antenna 32 is larger than the diameter of the first helical antenna 31. (See [reference]). Figure 3 ;

[0045] Here, when the roll-up screen is in a retracted state, the shaft assembly 4 is fitted onto the second spiral antenna 32, that is, the shaft assembly 4 is threadedly connected to the second spiral antenna 32. At this time, the shaft assembly 4 is loaded as the secondary medium of the antenna onto the second spiral antenna 32. The wavelength of the second spiral antenna 32 is different from the wavelength of the first spiral antenna 31, and the two spiral antennas operate in different frequency bands.

[0046] During the transition from the retracted to the unfolded state of the rollable screen, the position of the shaft assembly 4 moves from the second helical antenna 32 towards the first helical antenna 31. When the rollable screen is in the unfolded state, the shaft assembly 4 is fitted onto the first helical antenna 31, the diameter of which is larger than the diameter of the second helical antenna 32. (See [reference]). Figure 5 .

[0047] Here, with the rollable screen in its unfolded state, the shaft assembly 4 is fitted onto the first helical antenna 31, meaning the shaft assembly 4 completely surrounds the first helical antenna 31. The reason the shaft assembly 4 can completely surround the first helical antenna 31 is that the first helical antenna 31 is designed to operate at a high frequency, requiring a relatively small electrical length, thus allowing the secondary dielectric, i.e., the shaft assembly 4, to completely enclose the first helical antenna 31. However, because the diameter of the second helical antenna 32 is larger than the diameter of the first helical antenna 31, the internal thread of the shaft assembly 4 does not contact the first helical antenna 31. At this time, the shaft assembly 4, acting as the secondary dielectric of the antenna, is loaded onto the first helical antenna 31, causing a change in the wavelength of the first helical antenna 31 and switching its operating frequency band. Conversely, because the secondary dielectric leaves the second helical antenna 32, the wavelength of the second helical antenna 32 also changes, switching its operating frequency band. Therefore, the two helical antennas operate in different frequency bands.

[0048] In one specific implementation, when the rollable screen is in a retracted state, the first helical antenna 31 operates in the Wi-Fi 2.4G band, and the second helical antenna 32 operates in the GPS band;

[0049] It should be noted that the first helical antenna 31 operates in the Wi-Fi 2.4G band, satisfying D / λ < 1.8. At this time, the radiation pattern is consistent with the even-order sub-direction. Figure 1 The first helical antenna 32 operates in the GPS frequency band, satisfying D / λ = 0.25–0.46, and its radiation pattern exhibits end-fire characteristics. Due to the circular polarization of the helical antenna itself, polarization losses caused by different polarizations can be reduced, theoretically reducing polarization losses by 3dB. When the rollable screen is in its retracted state, the end-fire characteristics of the radiation pattern also better mitigate losses caused by the screen.

[0050] When the scroll screen is in the unfolded state, the first spiral antenna 31 operates in the Wi-Fi 5G band, and the second spiral antenna 32 operates in the Wi-Fi 2.4G band.

[0051] Here, the first helical antenna 31 operates in the Wi-Fi 5G band, while the second helical antenna 32, lacking the loading of the shaft assembly 4 as the secondary medium of the antenna, has an increased resonant frequency, operating in the 2.4G band. Simultaneously, the wavelength shortens with the increased frequency. At this point, the second helical antenna 32 satisfies D / λ > 0.46, exhibiting conical radiation characteristics and radiating around the scroll 1. When the scroll screen is in its unfolded state, since most electronic device users utilize Wi-Fi, the dual-band Wi-Fi capability in this unfolded state enhances the user experience.

[0052] Optionally, the first helical antenna 31 and the second helical antenna 32 are spaced apart by a preset distance.

[0053] It should be noted that the first helical antenna 31 and the second helical antenna 32 are spaced at a preset distance to avoid mutual interference between the two antennas.

[0054] In an alternative implementation, when the rollable screen is in the unfolded state, a portion of the second helical antenna 32 is threadedly connected to the shaft assembly 4, see [reference]. Figure 5 This is to facilitate the downward movement of the axis assembly 4 during the process of switching the rollable screen from the unfolded state to the retracted state (that is, rolling up the flexible screen 2).

[0055] In other words, during the process of the roll-up screen switching from the retracted state to the unfolded state, the shaft assembly 4 moves from the second spiral antenna 32 to the first spiral antenna 31 (from bottom to top in the figure). When the roll-up screen is fully unfolded (the roll-up screen is in the unfolded state), the moving length of the shaft assembly 4 is less than the length of the second spiral antenna 32.

[0056] Specifically, the first spiral antenna 31 has a first feed port 33 at the end away from the second spiral antenna 32, and the second spiral antenna 32 has a second feed port 34 at the end away from the first spiral antenna 31.

[0057] The first power supply port 33 and the second power supply port 34 are positioned far apart from each other. One reason is to facilitate the internal wiring layout design of the electronic equipment, and the other is to prevent some of the energy reflected from one power supply port from coupling to the other power supply port, causing interference problems.

[0058] The electronic device of this invention includes a rollable screen, an antenna, and a shaft assembly. The rollable screen includes a spool and a flexible screen wound around the spool. The antenna is wound around the spool. The shaft assembly is fitted onto the antenna, and the dielectric constant of the shaft assembly is different from that of the spool. Through the above structural arrangement, the position of the shaft assembly on the antenna changes during the switching between the rollable screen's unfolded and retracted states. Thus, by rotating the spool, which serves as the primary dielectric of the antenna, the shaft assembly, which serves as the secondary dielectric of the antenna, is loaded to different positions on the antenna, changing the wavelength of the antenna and thereby changing the antenna's radiation direction. Under the premise of simple antenna design, the antenna performance of the rollable screen electronic device in both the unfolded and retracted states can be guaranteed.

[0059] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0060] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electronic device, characterized in that, include: A rollable screen, comprising a roll and a flexible screen wound around the roll; Antenna, wherein the antenna is wound around the spool; A shaft assembly, which is fitted onto the antenna, has a different dielectric constant than the reel; During the process of switching between the unfolded and retracted states of the roll-up screen, the position of the shaft assembly on the antenna changes; The outer surface of the reel has threads; the shaft assembly is cylindrical, the inner surface of the shaft assembly has threads, and the shaft assembly is threadedly connected to the antenna. As the spool rotates, the antenna rotates with the spool, and the antenna pushes the thread on the inner surface of the shaft assembly to move up and down along the axis of the spool. The position of the shaft assembly on the antenna changes, wherein the antenna is a helical antenna.

2. The electronic device according to claim 1, characterized in that, The antenna includes a first helical antenna and a second helical antenna; the spool includes a first spool portion and a second spool portion, the first spool portion and the second spool portion are coaxially connected, and the diameter of the first spool portion is different from the diameter of the second spool portion; The first helical antenna is wound around the first spool portion, the second helical antenna is wound around the second spool portion, and the shaft assembly is threadedly connected to the helical antenna corresponding to the spool portion with a larger diameter.

3. The electronic device according to claim 2, characterized in that, The diameter of the first spool portion is smaller than the diameter of the second spool portion, and the dielectric constant of the spool is smaller than the dielectric constant of the shaft assembly; When the rollable screen is in the retracted state, the shaft assembly is fitted onto the second spiral antenna, and the diameter of the second spiral antenna is larger than the diameter of the first spiral antenna. During the process of the roll-up screen switching from the retracted state to the unfolded state, the position of the shaft assembly moves from the second helical antenna toward the first helical antenna; When the roll-up screen is in the unfolded state, the shaft assembly is fitted onto the first helical antenna, and the diameter of the first helical antenna is larger than the diameter of the second helical antenna.

4. The electronic device according to claim 3, characterized in that, The first helical antenna and the second helical antenna are spaced at a preset distance.

5. The electronic device according to claim 3, characterized in that, When the roll-up screen is in the unfolded state, a portion of the second helical antenna is threadedly connected to the shaft assembly.

6. The electronic device according to claim 3, characterized in that, The first spiral antenna has a first feed port at the end furthest from the second spiral antenna, and the second spiral antenna has a second feed port at the end furthest from the first spiral antenna.

7. The electronic device according to claim 1, characterized in that, During the process of the roll-up screen switching between the unfolded state and the retracted state, the operating frequency band of the antenna is switched.

8. The electronic device according to claim 3, characterized in that, When the rollable screen is in the retracted state, the first helical antenna operates in the Wi-Fi 2.4G band, and the second helical antenna operates in the GPS band. When the scroll screen is in the unfolded state, the first helical antenna operates in the Wi-Fi 5G band, and the second helical antenna operates in the Wi-Fi 2.4G band.

9. The electronic device according to claim 8, characterized in that, When the roll-up screen is in the retracted state, the first helical antenna satisfies D / λ < 1.8, and the second helical antenna satisfies D / λ = 0.25 to 0.46; When the roll-up screen is in the unfolded state, the second helical antenna satisfies D / λ>0.46; where D represents the diameter of the helical antenna and λ represents the wavelength of the helical antenna.

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