KR20160136486A - Antenna structure for portable phone - Google Patents

Antenna structure for portable phone Download PDF

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Publication number
KR20160136486A
KR20160136486A KR1020150069399A KR20150069399A KR20160136486A KR 20160136486 A KR20160136486 A KR 20160136486A KR 1020150069399 A KR1020150069399 A KR 1020150069399A KR 20150069399 A KR20150069399 A KR 20150069399A KR 20160136486 A KR20160136486 A KR 20160136486A
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KR
South Korea
Prior art keywords
frequency band
antenna
wireless communication
metal cover
portable terminal
Prior art date
Application number
KR1020150069399A
Other languages
Korean (ko)
Other versions
KR101686790B1 (en
Inventor
박종진
손지명
안중모
신현석
Original Assignee
주식회사 아이엠텍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to KR1020150069399A priority Critical patent/KR101686790B1/en
Publication of KR20160136486A publication Critical patent/KR20160136486A/en
Application granted granted Critical
Publication of KR101686790B1 publication Critical patent/KR101686790B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
  • Support Of Aerials (AREA)

Abstract

The present invention relates to an antenna structure for a portable terminal, which is capable of realizing the slimness or the simplification of a portable terminal (H) without requiring a flexible printed circuit board (FPCB) having a separate coil or a separate coil pattern for a low frequency band NFC antenna (40). The antenna structure for the portable terminal realizes the low frequency band NFC antenna (40) by respectively connecting a first length compensation line (31) and a second length compensation line (32) to both ends of a top metal deco (10) such that the first length compensation line (31) and the second length compensation line (32) form a loop together with the top metal deco (10).

Description

ANTENNA STRUCTURE FOR PORTABLE PHONE < RTI ID = 0.0 >

The present invention relates to an antenna structure for a portable terminal, and more particularly, to an antenna structure for a portable terminal, and more particularly, to an antenna structure for a portable terminal, which includes a first length compensation line and a second length compensation line, And more particularly, to an antenna structure for a portable terminal capable of implementing a low frequency band NFC antenna by forming a loop in a length compensation line.

The portable terminal should be lightweight and slim to ensure communication quality so that the portable terminal can be easily carried by the user.

An antenna for a portable terminal can be classified into an external antenna exposed to the outside and an internal antenna installed inside. In the beginning, the external antenna was mainly used, but the antenna was easily damaged by the external impact And there is a tendency to gradually shift to an internal antenna.

However, the built-in antenna has a disadvantage that the bandwidth is difficult to secure and the radiation pattern is distorted by the hand or the face or the band is fluctuated. In consideration of this point, the antenna should be designed so as to satisfy the layout structure capable of reducing the mutual influence with other parts and to exhibit the desired performance while occupying a small area.

Meanwhile, in order to enhance the external appearance of the portable terminal and to improve the design thereof, there has been attempted a model that is formed of metal, but the radiation characteristic of the antenna is deteriorated.

1 is a block diagram of a mobile terminal according to a prior art document (Korean Patent Laid-Open Publication No. 2014-0135350).

The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory unit 160, A controller 170, a controller 180, a power supply 190, and the like.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

2 is a front perspective view of a mobile terminal according to the prior art document.

The mobile terminal 100 includes a bar-shaped terminal body, and the body includes a case (casing, housing, cover, etc.) which forms an appearance.

In the prior art document, the case may be divided into a front case 101 and a rear case 102. A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102. [

The cases may be formed by injection molding synthetic resin or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti). Also, the front case may be formed by injecting synthetic resin, and the rear case may be separately formed to have a metal material.

The rear surface of the mobile terminal body of the prior art document, that is, the rear case 102, may further be equipped with a rear camera.

An antenna for receiving a broadcast signal may be additionally disposed on the side of the terminal body in addition to an antenna for a call or the like. An antenna constituting a part of the broadcast receiving module 111 may be installed to be able to be drawn out from the terminal body.

A power supply unit for supplying power to the mobile terminal 100 is mounted on the terminal body.

Generally, the mobile terminal has a wireless communication unit 110 for broadcasting reception, voice / data transmission / reception, and GPS information transmission / reception, and has an antenna for ensuring wireless communication performance.

The mobile terminal according to the prior art document can be made slim and lightweight by using the rear case 102 formed of a conductive metal as an antenna without having an external or internal antenna separately.

According to the prior art document, the front case 101 of the mobile terminal is injection molded by synthetic resin, the rear case 102 of the mobile terminal is formed of conductive metal, and then the front case 101 and the rear case 102 are combined, Can be formed.

At this time, the front case 101 and the rear case 102 of the mobile terminal may be formed to have a sloped side or a vertically bent shape so as to cover the side or bottom surface of the terminal body.

Specifically, since the rear case 102 is formed of a conductive metal such as aluminum, magnesium, or a steel alloy, the rear case 102 can be increased in rigidity with respect to weight and thinner, so that the design can be improved and durability can be improved. Such a metal case is excellent in moldability, and therefore, it is advantageous to manufacture a slot in a certain pattern.

3 is a rear perspective view of a mobile terminal according to the prior art document.

The rear case 102 of the mobile terminal 100 may be formed with slots s1 and s2 formed of a conductive metal and symmetrical to at least a partial area of the rear case 102. [ In addition, the rear case 102 of the mobile terminal may be formed to open an area c where the rear camera is disposed so as to expose the rear camera to the outside.

As described above, the specific region R1 of the rear case 102 separated by the slots s1 and s2 can be used as a radiator.

The applicant of the present application intends to propose an invention which can be utilized as an NFC antenna that goes beyond the prior art documents by utilizing a portion made of a metal material in a portable terminal.

Korean Patent Laid-Open Publication No. 2014-0135350 -

An object of the present invention is to connect a first length compensation line and a second length compensation line to both ends of a top metal deco, respectively, so that a first length compensation line and a second length compensation line, together with a top metal deco, Band NFC antenna according to the present invention.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an antenna structure for a portable terminal capable of realizing a slimmer or simpler portable terminal.

It is an object of the present invention to provide a method and an apparatus for combining a top metal deco and a first length compensating line and a second length compensating line so as to form a loop to maximize signal power and to interlock with a reading antenna of a reader for short- And an antenna structure for a portable terminal.

It is an object of the present invention to provide an antenna structure for a portable terminal capable of realizing a communication distance between a low frequency band NFC antenna and a reading antenna of a reader farther and wider, have.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a top metal deco having a folded top metal deco to cover the top metal deco from the top surface of the display portion to the side surface of the top metal cover, And it is an object of the present invention to provide an antenna structure for a portable terminal which is capable of facilitating a loop shape and preventing mutual connection from being exposed to the outside.

An object of the present invention is to provide a wireless communication terminal capable of connecting a top metal cover and a main metal cover through a ground line and allowing a top metal cover to implement a radio communication antenna of a high frequency band through a first feeding point and a second feeding point, Antenna structure.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an antenna structure for a portable terminal capable of providing a dual band high frequency band wireless communication antenna around an NFC antenna of a low frequency band.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an antenna structure for a portable terminal capable of providing a triple-band high-frequency wireless communication antenna around an NFC antenna of a low frequency band.

According to an aspect of the present invention,

1. An antenna structure for a portable terminal, comprising: a top metal deco that covers a top surface of a display unit that displays an image; and a rear metal cover that covers the rear of the display unit,

A loop is formed with the top metal deco via a first length compensation line connected to one end of the top metal deco and a second length compensation line connected to the other end of the top metal deco to realize a low frequency band NFC antenna And it is a basic characteristic of the technical structure.

The present invention relates to a method of forming a loop by connecting a first length compensation line and a second length compensation line to both ends of a top metal decor to form a loop by forming a first length compensation line and a second length compensation line, It is possible to implement an NFC antenna.

The present invention has the effect of realizing slimming or simplification of the portable terminal.

The present invention is characterized in that a first length compensation line and a second length compensation line together with a top metal decoh form a loop to maximize signal power so that interlocking with a leading antenna of a reader for short- .

The present invention can achieve a far greater communication distance between the NFC antenna of the low frequency band and the leading antenna of the reader, and at the same time, the efficiency of short range wireless communication can be ensured.

The top metal deco itself is bent so that the top metal deco is covered from the top surface of the display portion to the side surface of the top metal cover so that the loop shape It is possible to prevent the mutual connection state from being exposed to the outside.

The present invention has an effect that the upper metal cover and the main metal cover are connected to each other through the ground line and the upper metal cover allows the wireless communication antenna of the high frequency band to be implemented through the first feeding point and the second feeding point.

The present invention has an effect that a radio communication antenna of a dual band high frequency band can be provided around an NFC antenna of a low frequency band.

The present invention has an effect that a wireless communication antenna of a triple band high frequency band can be provided around an NFC antenna of a low frequency band.

1 is a block diagram of a mobile terminal according to a prior art document (Korean Patent Laid-Open Publication No. 2014-0135350).
2 is a front perspective view of a mobile terminal according to the prior art document.
3 is a rear perspective view of a mobile terminal according to the prior art document.
4 is an exploded perspective view and a schematic perspective view illustrating a portable terminal for explaining an antenna structure for a portable terminal according to the present invention.
FIG. 5 is a conceptual view illustrating the rear of a portable terminal for explaining an antenna structure for a portable terminal according to the present invention; FIG.
6A and 6B are signal power distribution diagrams illustrating an antenna structure for a portable terminal according to the present invention.
7A to 7D are simulation images showing a radiation pattern of signal power for explaining an antenna structure for a portable terminal according to the present invention.
8 is a graph illustrating the performance of an NFC antenna in a low frequency band to which an antenna structure for a portable terminal according to the present invention is applied.
FIG. 9 is a conceptual view illustrating the rear of a portable terminal for explaining an antenna structure for a portable terminal according to the first embodiment of the present invention; FIG.
FIG. 10 is a conceptual view illustrating the rear of a portable terminal for explaining an antenna structure for a portable terminal according to a second embodiment of the present invention; FIG.

The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. These and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. It becomes understandable.

FIG. 4 is an exploded perspective view and a schematic perspective view illustrating a portable terminal for explaining an antenna structure for a portable terminal according to the present invention, FIG. 5 is a perspective view illustrating a rear part of the portable terminal for explaining an antenna structure for a portable terminal according to the present invention. It is a conceptual diagram.

The portable terminal H according to the present invention includes a top metal decor 10 for covering a top surface of a display unit D for displaying an image as shown in FIGS. 4 and 5, And a rear metal cover 20 that covers the rear surface.

The top metal deco 10 and the rear metal cover 20 can be separated by the slits S and the independent configuration of the top metal decor 10 through the slits S is achieved in the present invention by the low frequency band NFC antenna 40 of FIG.

More specifically, the antenna structure for a portable terminal according to the present invention includes a first length compensation line 31 connected to one end of a top metal deco 10, and a second length compensating line 31 connected to the other end of the top metal deco 10, The first length compensating line 31 and the second length compensating line 32 together with the top metal decor 10 through the line 32 form a loop to form the NFC antenna 40 of the low frequency band .

Near field communication (NFC) is a kind of short-range wireless communication for electronic tag, and it can be regarded as a non-contact wireless communication module using a low frequency band of about 13.56 MHz.

That is, as a technique of transmitting data to the reader R at a distance of 10 cm, it is a next-generation short-range communication technology that is attracting attention due to its relatively low security and relatively low price because of its short communication distance. And there is no need for setting between devices such as Bluetooth, and it is a trend to add a short range wireless communication function to the portable terminal H in recent years.

In the present invention, since the top metal decor 10 is made of metal but does not form a loop, the first length compensation line 31 and the second length compensation line 31 are provided at both ends of the top metal decor 10 as shown in FIGS. 2 length compensation lines 32 are connected to each other so that the first length compensating line 31 and the second length compensating line 32 together with the top metal decor 10 form a loop to form the NFC antennas 40 It is not necessary to provide a flexible printed circuit board (FPCB) having a coil or a coil pattern for the NFC antenna 40 of a low frequency band, thereby realizing slimness or simplification of the portable terminal H .

FIGS. 6A and 6B are signal power distribution diagrams illustrating an antenna structure for a portable terminal according to the present invention, and FIGS. 7A to 7D illustrate a radiation pattern of signal power for explaining an antenna structure for a portable terminal according to the present invention. It is a simulation image.

The antenna structure for a portable terminal according to the present invention includes a top metal deco 10, a first length compensation line 31 and a second length compensation line 32 forming a loop, as shown in FIGS. 6A and 6B, It can be confirmed that the signal power capable of implementing the NFC antenna 40 of the low frequency band is distributed. In addition to the top metal decor 10, the first length compensation line 31 and the second length compensation line 31, as shown in FIGS. 7A to 7D, 2 length compensation line 32 forms a loop to maximize the signal power so that interworking with the leading antenna A of the reader R for short range wireless communication can be more actively implemented, It can be implemented more widely and at the same time, the efficiency of short range wireless communication can be guaranteed.

The signal power radiated from the loop by the first length compensating line 31 and the second length compensating line 32, along with the top metal decor 10, is then applied to the top metal decor (e. G. Axis direction and the Y-axis direction on the planes of the first length compensation line 31 and the second length compensation line 32 in the Z-axis direction opposite to the leading antenna A of the reader R, So that the centering of the signal power between the two can be extremely facilitated, thereby making it possible to maximize the convenience of use along with the expansion of the communication distance and communication width.

8 is a graph illustrating performance of an NFC antenna in a low frequency band to which an antenna structure for a portable terminal according to the present invention is applied.

8, the performance of the low-frequency NFC antenna 40 to which the antenna structure according to the present invention is applied has a gain of -32.5750 dB at 20 MHz, which is close to the frequency band of 13.6 MHz, It can be confirmed that near field wireless communication can be realized by the NFC antenna 40 of the low frequency band by the loop of the first length compensation line 31 and the second length compensation line 32 in addition to the metal decor 10. [

That is, the NFC antenna 40 of the low frequency band by the loop of the first length compensation line 31 and the second length compensation line 32, together with the top metal decor 10 of the present invention, (A) can be used as NFC.

The rear metal cover 20 preferably includes a top metal cover 21 covering the rear upper end of the display portion D and a main metal cover 22 covering the rear middle lower end of the display portion D It is needless to say that dividing the rear metal cover 20 into the upper metal cover 21 and the main metal cover 22 (slit S) makes it possible to perform radio communication in a high frequency band, It is important to consider the exterior design considering.

At this time, the top metal deco (10) is covered from the top surface of the display portion (D) to the side surface of the top metal cover (21) It is possible to facilitate the loop shape when connecting the first length compensating line 31 and the second length compensating line 32 so as not to expose the mutually connected state to the outside.

FIG. 9 is a conceptual view illustrating the rear of a portable terminal for explaining an antenna structure for a portable terminal according to a first embodiment of the present invention, FIG. 10 is a view for explaining an antenna structure for a portable terminal according to a second embodiment of the present invention And Fig.

9 and 10, the upper metal cover 21 and the main metal cover 22 are connected via a ground line 51 in accordance with the present invention, and the upper metal cover 21 is connected to the first feed point Frequency band wireless communication antenna 70 through the first feed point 61 and the second feed point 62. [

The high frequency band wireless communication antenna 70 is an antenna that enables radio communication in a high frequency band for data communication, video communication, voice communication, and wireless LAN communication such as LTE, GPS, WiFi and the like as 2,500 to 2,700 MHz, 1,700 to 2,170 MHz , 700~900 ㎒, 1.5 ㎓, 2.4 ㎓ and 2.5 ㎓ can be applied as a dual band or triple band according to the user's demand. At this time, it can be implemented as a PIFA (Planar Inverted F Antenna) The ground line 51 is provided between the upper metal cover 21 and the main metal cover 22 as well as the first feeding point 61 and the second feeding point 62 in the present invention.

At this time, the radio communication antenna 70 of the high frequency band implements the radio communication antenna 71 of the first high frequency band from the first feeding point 61 to the ground line 51 as shown in FIG. 9, The wireless communication antenna 72 of the second high frequency band is realized from the ground line 51 to the second feed point 62 so that the wireless communication of the dual band high frequency band around the NFC antenna 40 of the low frequency band The ground line 51 may be connected to the wireless communication antenna 70 of the high frequency band which is implemented as a PIFA without affecting the NFC antenna 40 of the low frequency band. 7A to 7D].

10, the upper metal cover 21 and the main metal cover 22 are disposed between the first feeding point 61 and the grounding line 51, (SPDT) (Single Pole Double Throw), for example, to the first feeding point 61 to the switching line 52 during ON switching, 73 while implementing the wireless communication antenna 71 of the first high frequency band from the first feeding point 61 to the ground line 51 at the time of OFF switching and at the same time, The wireless communication antenna 72 of the second high frequency band is realized until reaching the second feeding point 62 and the wireless communication antenna 70 of the triple band high frequency band is provided around the NFC antenna 40 of the low frequency band .

The present invention can be used in a wireless communication field used in a smart phone, a tablet PC, a notebook computer, a PDA, and the like.

H: portable terminal D: display section
S: Slit 10: Top metal deco
20: rear metal cover 21: upper metal cover
22: main metal cover 31: first length compensation line
32: second length compensation line 40: low frequency band NFC antenna
51: ground line 52: switching line
61: first feeding point 62: second feeding point
70: radio communication antenna in a high frequency band 71: radio communication antenna in a first high frequency band
72: radio communication antenna of the second high frequency band 73: radio communication antenna of the third high frequency band
R: Reader A: Leading antenna

Claims (6)

A top metal deco (10) covering a top surface of a display portion (D) showing an image and a rear metal cover (20) covering a rear portion of the display portion (D)
The top metal deco 10 is connected to the top metal deco 10 via a first length compensation line 31 connected to one end of the top metal deco 10 and a second length compensation line 32 connected to the other end of the top metal deco 10. [ And an NFC antenna (40) of a low frequency band is formed by forming a loop together with the antenna (40). The method according to claim 1,
The rear metal cover (20)
An upper metal cover 21 covering the rear upper end of the display unit D,
And a main metal cover (22) covering the rear middle lower end of the display part (D). 3. The method of claim 2,
Wherein the top metal decor (10) is covered from the top surface of the display part (D) to the side surface of the top metal cover (21). The method according to claim 2 or 3,
The upper metal cover 21 and the main metal cover 22 are connected via a ground line 51,
Wherein the upper metal cover (21) realizes a radio communication antenna (70) of a high frequency band through a first feeding point (61) and a second feeding point (62). 5. The method of claim 4,
The high-frequency band wireless communication antenna (70)
The wireless communication antenna 71 of the first high frequency band is implemented from the first feeding point 61 to the ground line 51,
Wherein the wireless communication antenna (72) of the second high frequency band is implemented from the ground line (51) to the second feeding point (62). 6. The method of claim 5,
The high frequency band wireless communication antenna 70 includes a switching line 52 for switching grounding the upper metal cover 21 and the main metal cover 22 between the first feeding point 61 and the ground line 51, Frequency band wireless communication antenna 73 from the first feeding point 61 to the switching line 52 during ON switching while implementing the wireless communication antenna 73 of the third high- Frequency band wireless communication antenna (71) from the ground line (51) to the ground line (51) And the second high frequency band wireless communication antenna (72) is implemented.
KR1020150069399A 2015-05-19 2015-05-19 Antenna structure for portable phone KR101686790B1 (en)

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KR101686790B1 KR101686790B1 (en) 2016-12-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112038752A (en) * 2020-09-02 2020-12-04 惠州Tcl移动通信有限公司 Low-frequency antenna assembly and mobile terminal thereof
CN115023039A (en) * 2022-05-17 2022-09-06 信利光电股份有限公司 Display module and electronic equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120119834A (en) * 2011-04-22 2012-10-31 엘지전자 주식회사 Mobile terminal
KR20120140373A (en) * 2011-06-21 2012-12-31 엘지전자 주식회사 Mobile terminal
KR20130110323A (en) * 2012-03-29 2013-10-10 삼성전자주식회사 Antenna device of mobile terminal
KR20140135350A (en) 2013-05-16 2014-11-26 엘지전자 주식회사 Mobile terminal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120119834A (en) * 2011-04-22 2012-10-31 엘지전자 주식회사 Mobile terminal
KR20120140373A (en) * 2011-06-21 2012-12-31 엘지전자 주식회사 Mobile terminal
KR20130110323A (en) * 2012-03-29 2013-10-10 삼성전자주식회사 Antenna device of mobile terminal
KR20140135350A (en) 2013-05-16 2014-11-26 엘지전자 주식회사 Mobile terminal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112038752A (en) * 2020-09-02 2020-12-04 惠州Tcl移动通信有限公司 Low-frequency antenna assembly and mobile terminal thereof
CN112038752B (en) * 2020-09-02 2023-10-03 惠州Tcl移动通信有限公司 Low-frequency antenna assembly and mobile terminal thereof
CN115023039A (en) * 2022-05-17 2022-09-06 信利光电股份有限公司 Display module and electronic equipment

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