CN113746957A - Screen-down structure and scene recognition method of mobile phone based on screen-down structure - Google Patents
Screen-down structure and scene recognition method of mobile phone based on screen-down structure Download PDFInfo
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- CN113746957A CN113746957A CN202010469677.5A CN202010469677A CN113746957A CN 113746957 A CN113746957 A CN 113746957A CN 202010469677 A CN202010469677 A CN 202010469677A CN 113746957 A CN113746957 A CN 113746957A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 325
- 229910052802 copper Inorganic materials 0.000 claims abstract description 325
- 239000010949 copper Substances 0.000 claims abstract description 325
- 239000000725 suspension Substances 0.000 claims abstract description 73
- 230000008859 change Effects 0.000 claims description 116
- 230000003247 decreasing effect Effects 0.000 claims description 18
- 238000013459 approach Methods 0.000 claims description 14
- 238000012163 sequencing technique Methods 0.000 claims description 12
- 230000005672 electromagnetic field Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 6
- 230000006698 induction Effects 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- LAXBNTIAOJWAOP-UHFFFAOYSA-N 2-chlorobiphenyl Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1 LAXBNTIAOJWAOP-UHFFFAOYSA-N 0.000 description 4
- 101710149812 Pyruvate carboxylase 1 Proteins 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/12—Details of telephonic subscriber devices including a sensor for measuring a physical value, e.g. temperature or motion
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Abstract
The invention provides an off-screen structure and a mobile phone scene identification method based on the off-screen structure. The under-screen structure is characterized by comprising a flexible circuit board, a PCB (printed circuit board), a suspension copper sheet, an SAR (synthetic aperture radar) sensor and a middle frame, wherein the flexible circuit board, the SAR sensor, the PCB and the suspension copper sheet are arranged on the middle frame; one end of the flexible circuit board is connected with the PCB, the other end of the flexible circuit board is connected with the suspension copper sheet, and the suspension copper sheet is connected with the middle frame and the SAR sensor respectively. The invention fully utilizes the SAR sensor under the screen and the special structure processing of the mobile phone, and utilizes the copper sheet part on the screen to carry out the solution, thereby realizing the identification of multiple scenes.
Description
Technical Field
The invention relates to the technical field of mobile phone scene identification, in particular to an off-screen structure and a mobile phone scene identification method based on the off-screen structure.
Background
At present, with the increase of communication demand functions of mobile phones, 2G, 3G, 4G and 5G communication frequency bands are widely applied to mobile phones and are used in curved screens, surround screens and other black technologies. The scheme of using the side frame of the mobile phone as the antenna has become generally practical. However, if the proximity of an object near the side antenna is detected and how to reduce the side SAR value, there is no other method for side detection unless the ID and the structure agree that the suspension frame section is used as the detection section. The same is true for the side-directed SAR reduction scheme, so the current SAR reduction scheme is mainly to directly reduce the conducted POWER, and there is no other effective method.
Disclosure of Invention
The invention provides an off-screen structure and a scene recognition method of a mobile phone based on the off-screen structure, which are used for solving the above situation.
A screen structure is characterized by comprising a flexible circuit board, a PCB, a suspension copper sheet, an SAR sensor and a middle frame, wherein,
the flexible circuit board, the SAR sensor, the PCB and the suspended copper sheet are arranged on the middle frame;
one end of the flexible circuit board is connected with the PCB, the other end of the flexible circuit board is connected with the suspension copper sheet, and the suspension copper sheet is respectively connected with the middle frame and the SAR sensor.
As an embodiment of the present invention: the suspended copper sheets comprise screen suspended copper sheets and screen side suspended copper sheets; wherein,
the screen suspension copper sheet and the screen side suspension copper sheet are respectively connected with the SAR sensor;
the suspension copper sheet is formed by cutting an inner layer metal copper sheet of the screen, and the screen comprises a straight screen or a curved screen.
As an embodiment of the present invention: the suspended copper sheets also comprise first suspended copper sheets, second suspended copper sheets and third suspended copper sheets; wherein,
the first suspended copper sheet, the second suspended copper sheet and the third suspended copper sheet are connected with the same SAR sensor;
the first suspension copper sheet, the second suspension copper sheet and the third suspension copper sheet are respectively connected with different flexible circuit boards.
As an embodiment of the present invention: the flexible circuit board comprises a first flexible circuit board, a second flexible circuit board, a third flexible circuit board and a fourth flexible circuit board;
one end of the first flexible circuit board is connected with the first suspension copper sheet through a first connector, and the other end of the first flexible circuit board is connected with the PCB;
the second flexible circuit board is connected with the second suspension copper sheet through a second connector, and the other end of the second flexible circuit board is connected with the PCB;
the third flexible circuit board is connected with the third suspension copper sheet through a third connector, and the other end of the third flexible circuit board is connected with the PCB;
one end of the fourth flexible circuit board is connected with the screen suspension copper sheet, and the other end of the fourth flexible circuit board is connected with the middle frame.
As an embodiment of the present invention: the area of the suspended copper sheet is not less than 50 square millimeters.
A mobile phone multi-scene identification method based on an off-screen structure comprises the following steps:
when an external object is close to the suspended copper sheet, the SAR sensor acquires charge change information of the suspended copper sheet;
determining the target distance between an external object and the suspended copper sheet according to the capacitance change information;
and carrying out scene recognition according to the target distance and a preset scene distance model.
As an embodiment of the present invention: when external object is close to with the suspension copper sheet, the SAR sensor acquires the charge change information of suspension copper sheet, include:
when an external object is close to the suspended copper sheet, the SAR sensor acquires charge change information of the suspended copper sheet according to the change of an electromagnetic field; wherein,
the charge change information includes:
screen charge change information of the screen suspension copper sheet;
first charge change information of the first suspended copper sheet;
second charge change information of the second suspended copper sheet;
third charge change information of a third suspended copper skin.
As an embodiment of the present invention: when external object is close to with the suspension copper sheet, the SAR sensor acquires the charge change information of suspension copper sheet, include:
the SAR sensor acquires the first charge change information, the second charge change information and the third charge change information, and determines a first change value of the first suspended copper sheet, a second change value of the second suspended copper sheet and a third change value of the third suspended copper sheet;
sequencing the first variation value, the second variation value and the third variation value to determine a sequencing order;
and determining a first distance sequence between the external object and the first, second and third suspended copper sheets according to the sorting sequence.
As an embodiment of the present invention: the determining the target distance between the external object and the suspended copper sheet according to the charge change information comprises the following steps:
judging the approaching direction of an external object according to the screen charge change information of the screen suspension copper sheet 6;
after the direction of the approach of the external object is determined:
calculating a first capacitance increasing and decreasing value of the first suspended copper sheet according to the first charge change information of the first suspended copper sheet, and determining a first distance value between the first suspended copper sheet and the external object through a preset algorithm according to the first capacitance increasing and decreasing value;
calculating a second capacitance increasing and decreasing value of the second suspended copper sheet according to second charge change information of the second suspended copper sheet, and determining a second distance value between the second suspended copper sheet and the external object through a preset algorithm according to the second capacitance increasing and decreasing value;
calculating a third capacitance increasing and decreasing value of the third suspended copper sheet according to third charge change information of the third suspended copper sheet, and determining a third distance value between the third suspended copper sheet and the external object through a preset algorithm according to the third capacitance increasing and decreasing value;
sequencing the first distance value, the second distance value and the third distance value to determine a second distance sequence;
comparing the first distance order and the second distance order;
when the first distance sequence is the same as the second distance sequence, indicating that the distance acquisition is correct, selecting the minimum distance value of the first distance value, the second distance value and the third distance value as a scene identification distance value, and acquiring the suspended copper sheet corresponding to the minimum distance value;
and when the first distance sequence is different from the second distance sequence, the charge change information of the suspended copper sheet is collected again for identification.
As an embodiment of the present invention: the method for determining the target distance between the external object and the suspended copper sheet according to the charge change information comprises the following steps:
step 1: obtaining the initial charge q of the first suspended copper sheet10And detecting the amount of charge q in real time1sThe initial charge q of the second suspended copper sheet20And detecting the amount of charge q in real time2s(ii) a Initial charge q of the third suspended copper sheet30And detecting the amount of charge q in real time3s；
Determining the charge variation quantity delta q of the first suspended copper sheet1＝q1s-q10；
Determining the charge variation quantity delta q of the second suspended copper sheet2＝q2s-q20；
Determining the charge variation quantity delta q of the third suspended copper sheet3＝q3s-q30；
Wherein I represents the current value of the first suspended copper sheet (62), the second suspended copper sheet (63) and the third suspended copper sheet (64);
step 2: obtaining current values of the first suspended copper sheet, the second suspended copper sheet and the third suspended copper sheet; obtaining the resistance value R of the first suspended copper sheet1(ii) a Resistance value R of the second suspended copper sheet2(ii) a Resistance value R of the third suspended copper sheet3；
According to the charge variation delta q of the first suspended copper sheet1(ii) a The charge variation delta q of the second suspended copper sheet2(ii) a The charge variation delta q of the third suspended copper sheet3；
Respectively determining the capacitance change values of the first suspended copper sheets
Capacitance variation value of the second suspended copper sheet
Capacitance variation value of the third suspended copper sheet
And step 3: according to the capacitance change value C of the first suspended copper sheet1The capacitance variation value C of the second suspended copper sheet2And the capacitance variation value C of the third suspended copper sheet3；
Respectively determining the distance between the external object and the first suspended copper sheet
The distance between the external object and the second suspended copper sheet
The distance between the external object and the third suspended copper sheet
Wherein, the
Is the dielectric constant; said S1Is the area of the first suspended copper sheet 62; said S2The area of the second suspended copper sheet 63; said S3The area of the third suspended copper sheet 64; log of saideS1Denotes S with e as base1The index of (1); log of saideS2Denotes S with e as base2The index of (1); log of saideS3Denotes S with e as base3The index of (1); f is an edge effect factor, and h is an adjacent constant between adjacent suspended copper sheets.
The invention has the beneficial effects that: the scheme makes full use of the SAR sensor under the screen and the special structural processing of the mobile phone, and utilizes the copper sheet part carried by the screen (a straight screen and a curved screen) to carry out the scheme solution. The copper sheet is divided into special sizes and shapes (determined according to the design condition of the mobile phone), the suspended copper sheet is used as a suspension sheet of the SAR sensor, when an external object approaches the mobile phone, the change of the capacity value is calculated by calculating the change of the electric charge and the electric quantity on the copper sheet, so that the distance of the external object approaching the mobile phone is obtained, and the identification of multiple scenes is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a diagram illustrating a structure of an under-screen structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the connection between the suspended copper sheet and the PCB of the under-screen structure according to the embodiment of the present invention;
FIG. 3 is a diagram of a left-handed handset according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a right-hand handset according to an embodiment of the invention;
fig. 5 is a schematic diagram of a SAR sensor in an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1:
as shown in fig. 1, a composition diagram of a screen structure, comprises a flexible circuit board, a PCB board 1, a suspension copper sheet, an SAR sensor and a middle frame 2, wherein,
the flexible circuit board, the SAR sensor, the PCB and the suspended copper sheet are arranged on the middle frame 2;
one end of the flexible circuit board is connected with the PCB board 1, the other end of the flexible circuit board is connected with the suspension copper sheet, and the suspension copper sheet is respectively connected with the middle frame 2 and the SAR sensor.
The principle of the invention is as follows: the invention realizes the identification of multiple scenes by processing the SAR sensor under the screen and the special structure of the mobile phone. The structure of the SAR sensor is shown in fig. 5, the SAR sensor of the mobile phone and the copper sheet part on the screen are processed, so that the capacitance of the suspended copper sheet can change when an external object approaches, and five input ports are provided at most and are respectively connected with the suspended copper sheet. The through holes 5 are formed in the middle frame 2 and connected with the suspended copper sheet, the flexible circuit board and the SAR sensor, so that the SAR sensor senses the change of capacitance. The SAR sensor converts the induction capacitance change generated by the approach or the distance of an external object to an induction sheet of the SAR sensor into the approach distance of the external object.
The distance between an external object and the induction sheet changes, so that the electromagnetic field changes, the charge amount on the induction sheet changes, the capacitance load value of the SAR sensor changes due to the change of the charge amount, the distance between the external object and the induction sheet can be calculated from the change of the capacitance value, and multi-scene recognition is achieved.
The invention has the beneficial effects that: the scheme makes full use of the SAR sensor under the screen and the special structural processing of the mobile phone, and utilizes the copper sheet part carried by the screen (a straight screen and a curved screen) to carry out the scheme solution. The copper sheet is divided into special sizes and shapes (determined according to the design condition of the mobile phone), the suspended copper sheet is used as a suspension sheet of the SAR sensor, when an external object approaches the mobile phone, the change of the capacity value is calculated by calculating the change of the electric charge and the electric quantity on the copper sheet, so that the distance of the external object approaching the mobile phone is obtained, and the multi-scene recognition is realized.
Example 2:
as an embodiment of the present invention: as shown in fig. 2, the suspended copper sheets include a screen suspended copper sheet 6 and a screen side suspended copper sheet 61; wherein,
the screen suspension copper sheet 6 and the screen side suspension copper sheet 61 are respectively connected with the SAR sensor;
the suspension copper sheet is formed by cutting an inner layer metal copper sheet 4 of the screen, and the screen comprises a straight screen or a curved screen.
The principle of the invention is as follows: the screen suspension copper sheet 6 is used for sensing the capacitance change of the screen; the screen side suspended copper sheet 61 is used to sense the capacitance change of the screen side. The screen suspension copper sheet 6 and the screen side suspension copper sheet 61 are the first suspension through sheets for judging the approach of an external object, but because the screen suspension copper sheet 6 is in the center of the mobile phone, and the screen side suspension copper sheet 61 is on the side surface of the mobile phone, if only one, the measurement result of the distance is not particularly accurate, and the screen side suspension copper sheet 61 determines one point for a plurality of distances, so that the measurement result is accurate.
The invention has the beneficial effects that: the invention can determine the first distance result according to the change state of the charge when an external object is contacted. The side inner layer copper sheet 4 directly passing through the screen is only processed from the interior of the original mobile phone, so that the cost is saved, and the structure originally provided is expanded in function.
Example 3:
as an embodiment of the present invention: the screen side suspended copper sheet 61 further comprises a first suspended copper sheet 62, a second suspended copper sheet 63 and a third suspended copper sheet 64; wherein,
the first suspended copper sheet 62, the second suspended copper sheet 63 and the third suspended copper sheet 64 are connected with the same SAR sensor;
the first suspension copper sheet 62, the second suspension copper sheet 63 and the third suspension copper sheet (64) are respectively connected with different flexible circuit boards.
The principle and the beneficial effects of the invention are as follows: the first suspended copper sheet 62, the second suspended copper sheet 63 and the third suspended copper sheet 64 are arranged on the side edge of the screen, so that when an external object is in contact with the screen, charge changes in the first suspended copper sheet 62, the second suspended copper sheet 63 and the third suspended copper sheet 64 can be induced, a second distance result of the external object close to the suspended copper sheets can be determined, the second distance result is judged according to a common distance result of three suspensions throughout, and the determined distance result is accurate.
Example 4:
as an embodiment of the present invention: the flexible circuit board comprises a first flexible circuit board 31, a second flexible circuit board 32, a third flexible circuit board 33 and a fourth flexible circuit board 34
One end of the first flexible circuit board 31 is connected with the first suspension copper sheet 62 through a first connector, and the other end of the first flexible circuit board is connected with the PCB 1; for communicating the change in capacitance of the first suspended copper sheet 62 to the SAR sensor.
The second flexible circuit board 32 is connected with the second suspension copper sheet 63 through a second connector, and the other end of the second flexible circuit board is also connected with the PCB 1; for transmitting the change in capacitance of the second suspended copper skin 63 to the SAR sensor.
The third flexible circuit board 33 is connected with the third suspension copper sheet 64 through a third connector, and the other end of the third flexible circuit board is connected with the PCB 1; for communicating the change in capacitance of the third suspended copper skin 64 to the SAR sensor.
One end of the fourth flexible circuit board 34 is connected with the screen suspension copper sheet 6, and the other end of the fourth flexible circuit board is connected with the middle frame 2; and is used for transmitting the capacitance change of the screen suspension copper sheet 6 to the SAR sensor.
And obtaining the capacitance change data of the first suspended copper sheet 62, the second suspended copper sheet 63 and the third suspended copper sheet 64 based on the processing of the PCB 1.
Has the advantages that: the data transmission is directly connected and transmitted through the flexible circuit board, and the response speed is accelerated.
Example 5:
as an embodiment of the present invention: the area of the suspended copper sheet is not less than 50 square millimeters. The charge amount larger than 50 square millimeters is large, and when the charge changes, the change is obvious, so that misjudgment is not easy to occur.
Example 6:
a mobile phone multi-scene identification method based on an off-screen structure comprises the following steps:
when an external object is close to the suspended copper sheet, the SAR sensor acquires charge change information of the suspended copper sheet;
determining the target distance between an external object and the suspended copper sheet according to the charge change information;
and carrying out scene recognition according to the target distance and a preset scene distance model.
The principle of the invention is as follows: the SAR sensor converts the induction capacitance change generated by the approach or the distance of an external object to an induction sheet of the SAR sensor, namely the suspension copper sheet into the approach distance of the external object.
The sensing piece of the SAR sensor is a suspended large-area metal piece with the area of at least about 50 square millimeters.
When the distance between an external object and the induction sheet of the SAR sensor changes, the electromagnetic field changes, so that the charge amount on the induction sheet changes, the capacitance load value of the SAR sensor changes due to the change of the charge amount, the distance between the external object and the induction sheet of the SAR sensor can be calculated from the change of the capacitance value, and multi-scene recognition is achieved.
The invention has the beneficial effects that: the scheme makes full use of the SAR sensor under the screen and the special structural processing of the mobile phone, and utilizes the copper sheet part carried by the screen (a straight screen and a curved screen) to carry out the scheme solution. Dividing the copper sheet into special sizes and shapes (determined according to the design condition of the mobile phone), and using the suspended copper sheet as a suspended sheet of the SAR sensor; namely, the induction sheet, when an external object is close to the mobile phone, the change of the capacity value is calculated by calculating the change of the electric quantity of the electric charge on the copper sheet, so that the distance between the external object and the mobile phone is obtained. And realizing the identification of multiple scenes.
Example 7:
as an embodiment of the present invention: when external object is close to with the suspension copper sheet, the SAR sensor acquires the charge change information of suspension copper sheet, include:
when an external object is close to the suspended copper sheet, the SAR sensor acquires charge change information of the suspended copper sheet according to the change of an electromagnetic field; wherein,
the charge change information includes:
screen charge change information of the screen suspension copper sheet 6;
first charge change information of the first suspended copper skin 62;
second charge change information of the second suspended copper skin 63;
third charge change information of the third suspended copper skin 64.
The invention has the beneficial effects that: the direction of the external object approaching can be judged through the screen charge change information and the screen side charge change information. The capacitance change values of the first suspended copper sheet 62, the second suspended copper sheet 63 and the third suspended copper sheet 64 can be further obtained through the first charge change information, the second charge change information and the second charge change information, and the suspended copper sheets are sensitive to the change of the charges due to the action of the electromagnetic field.
Example 8:
as an embodiment of the present invention: when external object is close to with the suspension copper sheet, the SAR sensor acquires the charge change information of suspension copper sheet, include:
the SAR sensor acquires the first charge change information, the second charge change information and the third charge change information, and determines a first change value of the first suspended copper sheet 62, a second change value of the second suspended copper sheet 63 and a third change value of the third suspended copper sheet 64;
sequencing the first variation value, the second variation value and the third variation value to determine a sequencing order;
and determining a first distance sequence between the external object and the first, second and third suspended copper sheets 62, 63 according to the sequencing sequence.
The principle and the beneficial effects of the invention are as follows: the change information of the charges is converted and is expressed in the form of a change value, the form of the change value can be compared, then the distance seat can be used for sequencing the external objects and the suspended copper sheets for the first time, and then the distance can be sequenced for the first time, so that the accuracy of the distance obtained after calculation can be checked according to the sequence.
Example 9:
as an embodiment of the present invention: the determining the target distance between the external object and the suspended copper sheet according to the charge change information comprises the following steps:
judging the approaching direction of an external object according to the screen charge change information of the screen suspension copper sheet 6;
after the direction of the approach of the external object is determined:
judging the approaching direction of an external object according to the screen charge change information of the screen suspension copper sheet 6 and the screen side charge change information of the screen side suspension copper sheet 61;
after the direction of the approach of the external object is determined:
calculating a first capacitance increasing and decreasing value of the first suspended copper sheet 62 according to the first charge change information of the first suspended copper sheet 62, and determining a first distance value between the first suspended copper sheet 62 and the external object through a preset algorithm according to the first capacitance increasing and decreasing value;
calculating a second capacitance increasing and decreasing value of the second suspended copper sheet 63 according to second charge change information of the second suspended copper sheet 63, and determining a second distance value between the second suspended copper sheet 63 and the external object through a preset algorithm according to the second capacitance increasing and decreasing value;
calculating a third capacitance increasing and decreasing value of the third suspended copper sheet 64 according to third charge change information of the third suspended copper sheet 64, and determining a third distance value between the third suspended copper sheet 64 and the external object through a preset algorithm according to the third capacitance increasing and decreasing value;
sequencing the first distance value, the second distance value and the third distance value to determine a second distance sequence;
comparing the first distance order and the second distance order;
when the first distance sequence is the same as the second distance sequence, indicating that the distance acquisition is correct, selecting the minimum distance value of the first distance value, the second distance value and the third distance value as a scene identification distance value, and acquiring the suspended copper sheet corresponding to the minimum distance value;
and when the first distance sequence is different from the second distance sequence, the charge change information of the suspended copper sheet is collected again for identification.
The invention has the beneficial effects that: after the direction is determined, the distance sorting order of the suspended copper sheets corresponding to the first distance value and the second distance value should be the same. The final result in the present invention can be verified by the first and second distance values. The finally obtained distance is the minimum distance certainly, the minimum distance represents the closest distance, and therefore the user can identify the scene through which the user makes a call or operates the mobile phone, and further the direction of opening the antenna is changed.
Example 10:
as an embodiment of the invention, the determining the target distance between the external object and the suspended copper sheet according to the charge change information comprises the following steps:
step 1: obtaining the initial charge q of the first suspended copper sheet 6210And detecting the amount of charge q in real time1sThe initial charge q of the second suspended copper sheet 6320And detecting the amount of charge q in real time2s(ii) a Initial charge q of the third suspended copper skin 6430And detecting the amount of charge q in real time3s；
Determining the charge change Δ q of the first suspended copper skin 621＝q1s-q10；
Determining the charge variation Deltaq of the second suspended copper skin 632＝q2s-q20；
Determining the charge change Δ q of the third suspended copper skin 643＝q3s-q30；
Step 2: acquiring current values of the first suspended copper sheet 62, the second suspended copper sheet 63 and the third suspended copper sheet 64; obtaining the resistance value R of the first suspended copper sheet 621(ii) a Resistance value R of the second suspended copper sheet 632(ii) a Resistance R of the third suspended copper sheet 643；
According to the charge variation quantity delta q of the first suspended copper sheet 621(ii) a The charge variation amount deltaq of the second suspended copper skin 632(ii) a The charge variation delta q of the third suspended copper sheet 643；
Respectively determining the capacitance change values of the first suspended copper sheets 62
Capacitance variation value of the second suspended copper sheet 63
Capacitance variation value of the third suspended copper sheet 64
Wherein I represents the current values of the first, second and third suspended copper sheets 62, 63 and 64;
and step 3: according to the capacitance change value C of the first suspended copper sheet 621The capacitance variation value C of the second suspended copper sheet 632And the capacitance change value C of the third suspended copper sheet 643；
Respectively determining the distance between the external object and the first suspended copper sheet 62
The distance between the external object and the second suspended copper sheet 63
The distance between the external object and the third suspended copper sheet 64
Wherein, the
Is the dielectric constant; said S1Is the area of the first suspended copper sheet 62; said S2The area of the second suspended copper sheet 63; said S3The area of the third suspended copper sheet 64; log of saideS1Denotes S with e as base1The index of (1); log of saideS2Denotes S with e as base2The index of (1); log of saideS3Denotes S with e as base3The index of (1); f is an edge effect factor, and h is an adjacent constant between adjacent suspended copper sheets.
According to the invention, the initial charge and the real-time charge of the first suspended copper sheet 62, the second suspended copper sheet 63 and the third suspended copper sheet 64 are respectively obtained, so that the variation of the charge can be determined, and the variation of the capacitance of the first suspended copper sheet 62, the second suspended copper sheet 63 and the third suspended copper sheet 64 can be obtained according to the variation of the charge; and finally, obtaining the target distances between the external object and the first, second and third suspended copper sheets 62, 63 and 64 through a calculation formula of capacitance and distance, and carrying out scene recognition through the target distances.
In one embodiment, six directions in which a mobile phone is placed when an SAR test is applied to multi-scenario detection such as antenna SAR detection and head-hand detection are respectively determined by taking a screen as a reference, wherein the six directions comprise a downward screen, an upward screen, a rightward screen, a leftward screen, a frontward screen, a backward screen and the like. The SAR detection problem of a side frame curved screen and a surrounding screen can be solved by the aid of the SAR detection method, so that SAR requirements are met by reducing power values through scene recognition, and the SAR sensor is not met by directly castrating the power values, and user experience is affected.
In one embodiment, detection of the first-hand test mode:
as shown in fig. 3 and 4, the handshaking scheme may help identify whether the left head is holding the handset with a hand or the right head is holding the handset with a hand, i.e., a left phone call scenario and a right phone call scenario. By identifying the holding state of the mobile phone, the corresponding switching of the antenna can be realized through the internal switch of the mobile phone. If the user holds the antenna by the right hand, the antenna is adjusted to transmit by the left side antenna, and if the user holds the antenna by the left hand, the antenna is adjusted to transmit by the right side antenna.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The under-screen structure is characterized by comprising a flexible circuit board, a PCB (printed circuit board) (1), a suspension copper sheet, an SAR sensor and a middle frame (2), wherein,
the flexible circuit board, the SAR sensor, the PCB and the suspended copper sheet are arranged on the middle frame (2);
one end of the flexible circuit board is connected with the PCB (1), the other end of the flexible circuit board is connected with the suspension copper sheet, and the suspension copper sheet is connected with the middle frame (2) and the SAR sensor respectively.
2. An under-screen structure according to claim 1, wherein the suspended copper sheets comprise a screen suspended copper sheet (6) arranged at the center of the screen and a screen side suspended copper sheet (61) arranged at the screen side; wherein,
the screen suspension copper sheet (6) and the screen side suspension copper sheet are respectively connected with the SAR sensor;
the screen is characterized in that the screen suspension copper sheet (6) and the screen side suspension copper sheet (61) are formed by cutting an inner layer metal copper sheet (4) of the screen, and the screen comprises a straight screen or a curved screen.
3. An under-screen structure according to claim 2, wherein the screen-side suspended copper skin (61) comprises a first suspended copper skin (62), a second suspended copper skin (63) and a third suspended copper skin (64); wherein,
the first suspended copper sheet (62), the second suspended copper sheet (63) and the third suspended copper sheet (64) are all connected with the SAR sensor;
the first suspension copper sheet (62), the second suspension copper sheet (63) and the third suspension copper sheet (64) are respectively connected with different flexible circuit boards.
4. An underscreen structure according to claim 3, characterized in that said flexible circuit boards comprise a first flexible circuit board (31), a second flexible circuit board (32), a third flexible circuit board (33) and a fourth flexible circuit board (34);
one end of the first flexible circuit board (31) is connected with the first suspension copper sheet (62) through a first connector, and the other end is connected with the PCB (1)
The second flexible circuit board (32) is connected with the second suspension copper sheet (63) through a second connector, and the other end of the second flexible circuit board is connected with the PCB (1);
the third flexible circuit board (33) is connected with the third suspension copper sheet (64) through a third connector, and the other end of the third flexible circuit board is connected with the PCB (1)
One end of the fourth flexible circuit board (34) is connected with the screen suspension copper sheet (6), and the other end of the fourth flexible circuit board is connected with the middle frame (2).
5. An underscreen structure according to claim 1, wherein the suspended copper skin has an area not less than 50 square millimeters.
6. A mobile phone multi-scene recognition method based on an off-screen structure, which adopts the off-screen structure of any one of claims 1-5, and is characterized by comprising the following steps:
when an external object is close to the suspended copper sheet, the SAR sensor acquires charge change information of the suspended copper sheet;
determining the target distance between an external object and the suspended copper sheet according to the charge change information;
and carrying out scene recognition according to the target distance and a preset scene distance model.
7. The method for identifying multiple scenes of a mobile phone according to claim 6, wherein when an external object approaches the floating copper sheet, the SAR sensor obtains the charge change information of the floating copper sheet, and the method comprises the following steps:
when an external object is close to the suspended copper sheet, the SAR sensor acquires charge change information of the suspended copper sheet according to the change of an electromagnetic field; wherein,
the charge change information includes:
screen charge change information of the screen suspension copper sheet (6);
first charge change information of the first suspended copper skin (62);
second charge change information of the second suspended copper sheet (63);
third charge change information of a third suspended copper skin (64).
8. The method for identifying multiple scenes of a mobile phone according to claim 7, wherein when an external object approaches the floating copper sheet, the SAR sensor obtains charge change information of the floating copper sheet, and further comprising:
the SAR sensor acquires the first charge change information, the second charge change information and the third charge change information, and determines a first change value of the first suspended copper sheet (62), a second change value of the second suspended copper sheet (63) and a third change value of the third suspended copper sheet (64);
sequencing the first variation value, the second variation value and the third variation value to determine a sequencing order;
and determining a first distance sequence between the external object and the first suspended copper sheet (62), the second suspended copper sheet (63) and the third suspended copper sheet (63) according to the sequencing sequence.
9. The method for identifying multiple scenes of a mobile phone according to claim 8, wherein the determining the target distance between the external object and the floating copper sheet according to the charge variation information comprises:
judging the approaching direction of an external object according to the screen charge change information of the screen suspension copper sheet (6);
after the direction of the approach of the external object is determined:
calculating a first capacitance increasing and decreasing value of the first suspended copper sheet (62) according to first charge change information of the first suspended copper sheet (62), and determining a first distance value between the first suspended copper sheet (62) and the external object through a preset algorithm according to the first capacitance increasing and decreasing value;
calculating a second capacitance increasing and decreasing value of the second suspended copper sheet (63) according to second charge change information of the second suspended copper sheet (63), and determining a second distance value between the second suspended copper sheet (63) and the external object through a preset algorithm according to the second capacitance increasing and decreasing value;
calculating a third capacitance increasing and decreasing value of the third suspended copper sheet (64) according to the change information of the third charge of the third suspended copper sheet (64), and determining a third distance value between the third suspended copper sheet (64) and the external object through a preset algorithm according to the third capacitance increasing and decreasing value;
sequencing the first distance value, the second distance value and the third distance value to determine a second distance sequence;
comparing the first distance order and the second distance order;
when the first distance sequence is the same as the second distance sequence, indicating that the distance acquisition is correct, selecting the minimum distance value of the first distance value, the second distance value and the third distance value as a scene identification distance value, and acquiring the suspended copper sheet corresponding to the minimum distance value;
and when the first distance sequence is different from the second distance sequence, the charge change information of the suspended copper sheet is collected again for identification.
10. The mobile phone multi-scene recognition method based on the under-screen structure, according to the claim 6, is characterized in that the determining of the target distance between the external object and the suspended copper sheet according to the charge change information comprises the following steps:
step 1: obtaining an initial charge q of the first suspended copper sheet (62)10And real-time inspectionMeasuring the quantity of electric charge q1sThe initial charge q of the second suspended copper sheet (63)20And detecting the amount of charge q in real time2s(ii) a Initial charge q of the third suspended copper sheet (64)30And detecting the amount of charge q in real time3s；
Determining a charge variation Δ q of the first suspended copper skin (62)1＝q1s-q10；
Determining the charge variation Deltaq of the second suspended copper skin (63)2＝q2s-q20；
Determining the charge variation Deltaq of the third suspended copper skin (64)3＝q3s-q30；
Step 2: obtaining current values of the first suspended copper sheet (62), the second suspended copper sheet (63) and the third suspended copper sheet (64); obtaining the resistance value R of the first suspended copper sheet (62)1(ii) a The resistance value R of the second suspended copper sheet (63)2(ii) a The resistance value R of the third suspended copper sheet (64)3；
According to the charge variation quantity delta q of the first suspended copper sheet (62)1(ii) a The charge variation delta q of the second suspended copper sheet (63)2(ii) a The charge variation delta q of the third suspended copper sheet (64)3；
Respectively determining the capacitance variation value of the first suspended copper sheet (62)
The capacitance change value of the second suspended copper sheet (63)
The capacitance change value of the third suspended copper sheet (64)
Wherein I represents the current value of the first suspended copper sheet (62), the second suspended copper sheet (63) and the third suspended copper sheet (64);
step (ii) of3, according to the capacitance change value C of the first suspended copper sheet (62)1The capacitance variation value C of the second suspended copper sheet (63)2And the capacitance variation value C of the third suspended copper sheet (64)3；
Respectively determining the distance between the external object and the first suspended copper sheet (62)
The distance between the external object and the second suspended copper sheet (63)
The distance between the external object and the third suspended copper sheet (64)
Wherein, the
Is the dielectric constant; said S1Is the area of the first suspended copper sheet (62); said S2The area of the second suspended copper sheet (63); said S3Is the area of the third suspended copper sheet (64); log of saideS1Denotes S with e as base1The index of (1); log of saideS2Denotes S with e as base2The index of (1); log of saideS3Denotes S with e as base3The index of (1); f is an edge effect factor, and h is an adjacent constant between adjacent suspended copper sheets.
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