electronic devices

Abstract

The present application discloses an electronic device, belonging to the field of electronic products. The electronic device disclosed in the present application comprises: a first screen body and a second screen body that are foldable relative to each other, a feed source, and a conductive sheet, wherein the first screen body comprises a first body and a first display screen, and the second screen body comprises a second body and a second display screen, the conductive sheet is located between the first body and the first display screen, and the feed source is electrically connected to the conductive sheet; when the first screen body and the second screen body are in a folded state, the first body, the conductive sheet, the first display screen, the second display screen, and the second body are stacked, and the conductive sheet forms a coupling capacitor with the first display screen.

Description

Technical Field

[0001] The present application belongs to the field of electronic products, and specifically relates to an electronic device. Background Art

[0002] With the development of flexible display technology, foldable electronic devices are becoming increasingly popular among users. When a foldable electronic device is folded, it is small and easy to carry; when it is unfolded, it has a large screen area, which provides a higher visual effect for the user. However, when a foldable electronic device is in the folded state, the antenna system will be excited to form a high-loss U-shaped resonant cavity. Once the U-shaped resonant cavity is excited, it will absorb the energy of the electromagnetic wave, resulting in a decrease in the radiation efficiency of the antenna in the electronic device at the resonant frequency, resulting in poor performance of the antenna system. Because this resonant frequency interferes with the operation of the electronic device, this case refers to this resonant frequency as a clutter frequency. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide an electronic device that can solve the problem of poor performance of the antenna system.

[0004] An embodiment of the present application provides an electronic device, which includes: a first screen body and a second screen body that can be folded relative to each other, a feed source and a conductive sheet, wherein the first screen body includes a first body and a first display screen, the second screen body includes a second body and a second display screen, the conductive sheet is located between the first body and the first display screen, and the feed source is electrically connected to the conductive sheet; when the first screen body and the second screen body are in a folded state, the first body, the conductive sheet, the first display screen, the second display screen, and the second body are respectively stacked, and the conductive sheet forms a coupling capacitor with the first display screen.

[0005] In an embodiment of the present application, when the first screen body and the second screen body of the electronic device are in a folded state, a conductive sheet is arranged between the first body and the first display screen to form a coupling capacitor. The coupling capacitor can change the clutter frequency of the U-shaped resonant cavity formed by the display screen in the folded state, so that the clutter frequency is different from the operating frequency of the electronic device, thereby reducing the impact of the U-shaped resonant cavity on the antenna system and improving the performance of the antenna system of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is one of the structural diagrams of the electronic device provided in the embodiment of the present application;

[0007] Figure 2 This is the second structural diagram of the electronic device provided in the embodiment of the present application;

[0008] Figure 3 is a schematic diagram of an equivalent circuit of an electronic device antenna system provided in an embodiment of the present application;

[0009] Figure 4 is a schematic diagram of a radiation efficiency curve of an electronic device provided in an embodiment of the present application;

[0010] Figure 5 This is the third structural diagram of the electronic device provided in the embodiment of the present application;

[0011] Figure 6 This is the fourth structural diagram of the electronic device provided in the embodiment of the present application;

[0012] Figure 7 This is the fifth structural diagram of the electronic device provided in the embodiment of the present application;

[0013] Figure 8 This is the sixth structural diagram of the electronic device provided in the embodiment of the present application.

[0014] Figure 9 This is the seventh structural diagram of the electronic device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0016] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0017] The electronic device provided in the embodiments of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0018] See Figure 1 , is a schematic diagram of the structure of an electronic device provided in this application, the electronic device comprising:

[0019] A first screen body 200 and a second screen body 100 that are foldable relative to each other, a feed source 130, and a conductive sheet 140. The first screen body 200 includes a first body 120 and a first display screen 180. The second screen body 100 includes a second body 110 and a second display screen 170. The conductive sheet 140 is located between the first body 120 and the first display screen 180. The feed source 130 is electrically connected to the conductive sheet 140.

[0020] When the first screen body 200 and the second screen body 100 are in a folded state, the first body 120, the conductive sheet 140, the first display screen 180, the second display screen 170, and the second body 110 are stacked respectively, and the conductive sheet 140 forms a coupling capacitor with the first display screen.

[0021] Among them, the feed source 130 is part of the antenna system and can form and propagate electromagnetic waves. The conductive sheet 140 can be a coupling capacitor metal sheet. The metal sheet can be realized through various types of plastic / ceramic surface metallization processes, or can be realized through printed circuit boards, including rigid, flexible, and soft-rigid printed circuit boards. It can be realized through metal processing processes such as sheet metal and CNC machine tools, or can be realized through processing processes such as the fusion of metal sheets and plastic injection molding. The shape of the metal sheet can be either a 2D planar structure or a structural part with a 3D shape. The specific shape of the metal sheet can be designed according to the requirements of the internal stacking of the entire machine, the process implementation method, the size of the coupling capacitor, etc., and is not limited to common shapes such as rectangles, circles, ellipses, triangles, squares, and polygons.

[0022] like Figure 2 As shown, in this embodiment, when the display screen is in the folded state and the conductive sheet 140 is not provided, the feed source 130 couples the input signal to the high-loss U-shaped resonant cavity 150 through the coupling capacitance with the display screen. The equivalent circuit is shown as follows: Figure 3 As shown, in this embodiment, the value of the coupling capacitor can be adjusted to change the clutter frequency of the U-shaped resonant cavity 150 so that it can be distinguished from the operating frequency of the electronic device, thereby optimizing the overall radiation performance of the antenna system.

[0023] In this embodiment, by placing the conductive sheet 140 between the first body 120 and the first display screen 180, the size of the coupling capacitor is changed, the clutter frequency is adjusted to outside the system operating frequency band, and the radiation efficiency of the entire antenna system is improved. The radiation efficiency curve before and after the metal conductive sheet is placed is: Figure 4As shown, the frequency f1 is less than the frequency f2, and the frequency f2 is the operating frequency of the system. When no optimization is performed, the clutter frequency in the folded state is within the operating frequency band of the system, affecting the operating performance of the system. After the conductive sheet 140 is added, the area of the flat plate capacitor is increased. Based on the theoretical calculation formula of the flat plate capacitor, it can be seen that the size of the flat plate capacitor is proportional to the area directly opposite to the two plates. Therefore, the capacitance value of the coupling capacitor is increased, so that the clutter frequency and the operating frequency of the electronic device are f1 and f2, respectively. Therefore, the influence of the clutter frequency on the electronic device is reduced.

[0024] It should be noted that in this embodiment, the value of the coupling capacitor can be reduced to adjust the clutter frequency to a value higher than the operating frequency of the electronic device, thereby reducing the impact of the clutter frequency on the electronic device. For example, the clutter frequency can be increased by optimizing the design of relevant structural components in the display screen to reduce the capacitance value of the original coupling capacitor.

[0025] Furthermore, the folding area may be provided with a hinge, and the first display screen 180 may be rotatably connected to the second display screen 170 via the hinge. Furthermore, a first magnetic body may be provided within the first body 120, and a second magnetic body may be provided within the second body 110. When the electronic device is in the folded state, the first magnetic body and the second magnetic body are attracted to each other.

[0026] In the embodiment of the application, when the first screen body 200 and the second screen body 100 of the electronic device are in a folded state, the conductive sheet 140 is arranged between the first body 120 and the first display screen 180, and the first display screen 180 and the second display screen 170 form an integral structure. The conductive sheet 140 and the integral structure form a coupling capacitor. The coupling capacitor can change the clutter frequency of the U-shaped resonant cavity 150 formed by the display screen in the folded state, so that the clutter frequency is different from the operating frequency of the electronic device, thereby reducing the impact of the U-shaped resonant cavity 150 on the antenna system and improving the performance of the antenna system of the electronic device.

[0027] Optionally, the conductive sheet 140 includes at least two sub-conductive sheets 141 and a control switch 142;

[0028] The at least two sub-conductive sheets 141 are arranged in parallel, and any two adjacent sub-conductive sheets 141 are electrically connected via one control switch 142 .

[0029] In this embodiment, the number of sub-conductive sheets 141 can be multiple. By arranging multiple sub-conductive sheets 141, the capacitance of the coupling capacitor can be increased or decreased according to actual needs. Specifically, the capacitance can be adjusted based on the internal stacking of the entire device, the process implementation method, the coupling capacitor size, the adjustable range of the spurious frequency, and other factors. The control switch 142 is connected between any two adjacent sub-conductive sheets 141. By controlling the on and off of each control switch 142 and adjusting the connection status between the coupled metal structures, the coupling capacitor size can be adjusted, thereby adjusting the spurious frequency of the antenna system. When the control switch 142 is closed, the two sub-conductive sheets 141 are electrically connected; when the control switch 142 is open, the two sub-conductive sheets 141 are electrically disconnected. It should be noted that in this embodiment, the control switch 142 can also include a control chip. By programming the control chip with logic, the electronic device can adjust the opening or closing status of the control switch 142 according to the actual circuit conditions, thereby achieving a precise control effect. Exemplarily, the at least two sub-conductive sheets 141 are stacked in sequence. When at least two sub-conductive sheets 141 are stacked, the capacitance of the coupling capacitor is increased, thereby adjusting the frequency of the clutter. For example, if two identical sub-conductive sheets 141 are both rectangular, stacking them to form an L-shaped structure increases the area of the planar capacitor, thereby also increasing the capacitance of the coupling capacitor.

[0030] In one embodiment, optionally, the at least two sub-conductive sheets 141 are arranged in an array in a target plane, and the target plane is a plane opposite to the first display screen 180 .

[0031] See Figure 5 ,exist Figure 5 In the figure, four sub-conductive sheets 141 are used as an example. In this embodiment, four coupling capacitor metal sheets are set between the antenna feed and the U-shaped resonant cavity 150. Based on the relative positions of the four metal sheets, a total of four control switches 142 are added. By controlling the on-off state of the four control switches 142, the connection of one, two, three, and four sub-conductive sheets 141 can be achieved in sequence. When two, three, and four sub-conductive sheets 141 are connected in sequence, the size of the coupling capacitor can be gradually increased, and the frequency of the clutter will be reduced in sequence. Therefore, the more sub-conductive sheets 141 are connected, the smaller the impact of the clutter frequency on the antenna system. In actual application, the on-off state of the four control switches 142 can be adaptively adjusted according to the actual operating frequency band of the electronic device, and the clutter frequency can be adjusted to a position away from the current operating frequency band of the system, thereby reducing the impact of clutter on the antenna radiation efficiency and improving the performance of the overall antenna system.

[0032] This embodiment adjusts the clutter frequency by introducing multiple coupling capacitor metal plates and multiple switching devices, so that when the antenna system operates in different frequency bands, the clutter frequency can be adjusted to be away from the current operating frequency band, thereby improving the antenna's radiation performance, providing greater flexibility, and enabling the system to operate in more frequency bands.

[0033] In one embodiment, optionally, the first body 120 includes a first frame 121 and a first metal frame 122 , the first frame 121 is located inside the first metal frame 122 , and the first frame 121 and the first metal frame 122 are fixedly connected;

[0034] The first frame 121 includes a first recessed portion 1211 located at an edge, and the first metal frame 122 includes a first raised portion 1221 protruding toward one side of the first frame 121 and located in the first recessed portion 1211, with a gap formed between the first raised portion 1221 and the first recessed portion 1211;

[0035] The feed source 130 is located in the gap, and the feed source 130 is electrically connected to the first recessed portion 1211 and the first raised portion 1221 , respectively. The first raised portion 1221 is electrically connected to the conductive sheet 140 .

[0036] The shapes of the first recessed portion 1211, the first raised portion 1221 and the gap therebetween can be adaptively adjusted according to actual requirements such as the stacking of the entire device, structural strength, and PCB routing. Figure 6 The diagram in FIG. 1 is a schematic diagram of one of the embodiments. The shapes of the first recessed portion 1211, the first raised portion 1221 and the gap therebetween are not limited to Figure 6 shown.

[0037] The conductive sheet 140 is opposite to the feed source 130 .

[0038] See Figure 6 and Figure 7In this embodiment, the first frame 121 and the first metal frame 122 constitute the main structure of the first body 120. In addition, the first body 120 may also include: corresponding brackets, battery covers, batteries, etc. Specifically, the first metal frame 122 is arranged inside the first frame 121 and is fixedly connected to the first frame 121. In some embodiments, the first metal frame 122 and the first frame 121 can also be assembled together to form an integral structure through certain process methods. It should be noted that the first protrusion 1221 is provided with related structures of the antenna system, which is not specifically limited in this embodiment. The first protrusion 1221 is electrically connected to the conductive sheet 140, and the connection method can be a wire or a structural connection. Among them, for example, the structural connection can be provided with an additional cylindrical second protrusion on the first protrusion 1221, and the second protrusion connects the conductive sheet 140 and the first protrusion 1221 and has a conductive function.

[0039] like Figure 7 As shown in , specifically, the first metal frame 122 includes a first metal edge 1222 and a second metal edge 1223;

[0040] The first metal edge 1222 is adjacent to the second metal edge 1223 , and one end of the first metal edge 1222 is connected to one end of the second metal edge 1223 ;

[0041] At least one first break 1224 is formed on the first metal edge 1222 , and the at least one first break 1224 divides the first metal frame 122 into at least two first segments 1225 ;

[0042] The first protrusion 1221 is disposed on one of the at least two first segments 1225 .

[0043] In this embodiment, the first metal frame 122 is divided into a first metal edge 1222 and a second metal edge 1223, wherein the first metal edge 1222 is the bottom edge and the second metal edge 1223 is the side edge, and the two together form the first metal frame 122. The first metal edge 1222 is divided into a plurality of first segments 1225 by a plurality of first cuts 1224. In this embodiment, the first segments 1225 can be a plurality of radiators. In this embodiment, by forming two radiators on the same metal segment, it is beneficial to save antenna installation space in the first metal frame 122, thereby facilitating the production of more antennas in the first metal frame 122. The first cuts 1224 separate the plurality of first segments 1225, thereby facilitating relative isolation between two antennas produced on the same metal segment.

[0044] In other embodiments, an isolation portion may be provided on any two first segments 1225 , thereby facilitating relative isolation between two antennas fabricated on the same metal segment.

[0045] In an embodiment of the application, when the display screen of the electronic device is in a folded state, a conductive sheet 140 is arranged between the first body 120 and the first display screen 180 to form a coupling capacitor. The coupling capacitor can change the clutter frequency of the U-shaped resonant cavity 150 formed by the display screen in the folded state, so that the clutter frequency is different from the operating frequency of the electronic device, thereby reducing the impact of the U-shaped resonant cavity 150 on the antenna system and improving the performance of the antenna system of the electronic device.

[0046] Optionally, the second body 110 includes a second frame and a second metal frame, the second frame is located inside the second metal frame, and the second frame and the second metal frame are fixedly connected;

[0047] The second frame is provided with a first hollow area. When the first screen body 200 and the second screen body 100 are in a folded state, the first hollow area is opposite to the feed source 130 .

[0048] In this embodiment, optionally, the second body 110 has the same structure as the first body 120 in the above embodiment. Specifically, the second frame is arranged inside the second metal frame, and the second frame and the second metal frame are fixedly connected. In some embodiments, the second metal frame and the second frame can also be assembled together through certain process methods to form an integral structure.

[0049] Among them, based on the theoretical calculation formula of flat-plate capacitors, hollowing out some areas on the relevant structural parts of the U-shaped resonant cavity 150 will help reduce the coupling capacitance and move the antenna clutter frequency toward a higher frequency. Thus, when the first screen body 200 and the second screen body 100 are in a folded state, the first hollowed-out area is opposite to the feed source 130, that is, the first hollowed-out area covers the feed source 130. It should be noted that the shape of the first hollowed-out area is not specifically limited in this embodiment, and can be a circle, a rectangle or other irregular shapes, etc. Through the first hollowed-out area, it is possible to reduce the capacitance value of the coupling capacitor in this embodiment. After the capacitance value of the coupling capacitor decreases, the clutter frequency will increase, thereby distinguishing it from the operating frequency of the antenna system.

[0050] Optionally, the first display screen 180 and the second display screen 170 further include an indium tin oxide ITO layer 160;

[0051] The ITO layer 160 includes a second hollow area 161 . When the first screen body 200 and the second screen body 100 are in a folded state, the second hollow area 161 is opposite to the feed source 130 .

[0052] like Figure 8 As shown, in this embodiment, the ITO indium tin oxide layer refers to a high-tech product obtained by sputtering a transparent indium tin oxide conductive thin film coating on a transparent organic thin film material using a magnetron sputtering method and then undergoing a high-temperature annealing treatment. It is often used in display screens of electronic devices and relies on its electrical conductivity and light conductivity to conduct current without affecting the normal display of the display screen.

[0053] Among them, a second hollowed-out area 161 is provided in the ITO layer 160, and the second hollowed-out area 161 is opposite to the feed source 130. When the first display screen 180 and the second display screen 170 are in a folded state, the second hollowed-out area is opposite to the feed source 130, that is, the second hollowed-out area 161 covers the feed source 130. It should be noted that the shape of the second hollowed-out area 161 is not specifically limited in this embodiment, and can be circular, rectangular, or other irregular shapes, etc., and a rectangle is used as an example in the figure. The second hollowed-out area 161 can be used to reduce the capacitance value of the coupling capacitor in this embodiment. After the capacitance value of the coupling capacitor decreases, the clutter frequency will increase, thereby distinguishing it from the operating frequency of the antenna system.

[0054] In another embodiment, the ITO layer 160 includes a plurality of strip-shaped holes arranged in an array, and the plurality of strip-shaped holes arranged in an array form the second hollowed-out area 161 .

[0055] See Figure 9 , wherein a row of slots is hollowed out in the ITO layer 160, and the slots are opposite to the feed source 130 when the first screen body 200 and the second screen body 100 are in the folded state, thereby reducing the coupling capacitance between the high-loss U-shaped resonant cavity 150 and the feed source 130, thereby increasing the antenna clutter frequency and moving it outside the operating frequency band of the antenna system, thereby improving the radiation efficiency of the antenna system. Compared with directly setting the second hollowed-out area 161 in the above embodiment, by hollowing out a row of slots in the ITO layer 160, the impact on the ITO layer 160 can be reduced, thereby avoiding the second hollowed-out area 161 being large and affecting the touch recognition of the mobile phone. Specifically, the slots can be rectangular, diamond-shaped, circular, etc. Different shape settings can achieve the effect of reducing the coupling capacitance between the U-shaped resonant cavity 150 and the antenna excitation section, thereby improving the radiation efficiency of the antenna system.

[0056] Optionally, the display screen further includes a touch layer;

[0057] A third hollowed-out area is provided on the touch layer. When the first screen body 200 and the second screen body 100 are in a folded state, the third hollowed-out area is opposite to the feed source 130 .

[0058] In this embodiment, a touch layer is further provided in the first display screen 180 and the second display screen 170. Exemplarily, the touch layer may include an ITO layer, a metal alloy layer, or other material layer. Specifically, a third hollowed-out area is provided in the touch layer, and the third hollowed-out area is opposite to the feed source 130. When the first screen body 200 and the second screen body 100 display screens are in a folded state, the third hollowed-out area is opposite to the feed source 130, that is, the third hollowed-out area covers the feed source 130. It should be noted that the shape of the third hollowed-out area is not specifically limited in this embodiment, and may be a circle, a rectangle, or other irregular shapes, etc. By partially hollowing out the interior of the touch layer, it is possible to achieve the purpose of adjusting the antenna clutter frequency and retain the ITO touch function, so that the touch recognition of the electronic device will not be affected.

[0059] In an embodiment of the application, when the first screen body 200 and the second screen body 100 of the electronic device are in a folded state, the conductive sheet 140 is arranged between the first body 120 and the first display screen 180 to form a coupling capacitor. The coupling capacitor can change the clutter frequency of the U-shaped resonant cavity 150 formed by the display screen in the folded state, so that the clutter frequency is different from the operating frequency of the electronic device, thereby reducing the impact of the U-shaped resonant cavity 150 on the antenna system and improving the performance of the antenna system of the electronic device.

[0060] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0061] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An electronic device, characterized in that: include: A first and second screen bodies that are foldable relative to each other, a feed source, and a conductive sheet, wherein the first screen body includes a first body and a first display screen, the second screen body includes a second body and a second display screen, the conductive sheet is located between the first body and the first display screen, and the feed source is electrically connected to the conductive sheet; When the first screen body and the second screen body are in a folded state, the first display screen and the second display screen form a U-shaped resonant cavity, the first body, the conductive sheet, the first display screen, the second display screen, and the second body are stacked respectively, and the conductive sheet and the first display screen form a coupling capacitor.

2. The electronic device according to claim 1, wherein The conductive sheet includes at least two sub-conductive sheets and a control switch; The at least two sub-conductive sheets are arranged in an array, and any two adjacent sub-conductive sheets are electrically connected via one control switch.

3. The electronic device according to claim 2, wherein: The at least two sub-conductive sheets are stacked in sequence.

4. The electronic device according to claim 2, wherein: The at least two sub-conductive sheet arrays are arranged in a target plane, and the target plane is a plane opposite to the first display screen.

5. The electronic device according to claim 1, wherein: The first body includes a first frame and a first metal frame, the first frame is located inside the first metal frame, and the first frame and the first metal frame are fixedly connected; The first frame includes a first recessed portion located at an edge, the first metal frame includes a first raised portion protruding toward one side of the first frame and located in the first recessed portion, and a gap is formed between the first raised portion and the first recessed portion; The feed source is located in the gap, and the feed source is electrically connected to the first recessed portion and the first raised portion respectively, and the first raised portion is electrically connected to the conductive sheet.

6. The electronic device according to claim 1, wherein: The second body includes a second frame and a second metal frame, the second frame is located inside the second metal frame, and the second frame and the second metal frame are fixedly connected; The second frame is provided with a first hollow area, and when the first screen body and the second screen body are in a folded state, the first hollow area is opposite to the feed source.

7. The electronic device according to claim 1, wherein: The first display screen and the second display screen further include an indium tin oxide (ITO) layer; The ITO layer includes a second hollowed-out area. When the first screen body and the second screen body are in a folded state, the second hollowed-out area is opposite to the feed source.

8. The electronic device according to claim 7, characterized in that The ITO layer includes a plurality of strip-shaped holes arranged in an array, and the plurality of strip-shaped holes arranged in an array form the second hollowed-out area.

9. The electronic device according to claim 1, wherein: The display screen also includes a touch layer; A third hollowed-out area is provided on the touch layer. When the first screen body and the second screen body are in a folded state, the third hollowed-out area is opposite to the feed source.

10. The electronic device according to claim 5, characterized in that The conductive sheet is opposite to the feed source.

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