CN209265998U - A kind of liquid crystal display screen of mobile phone with charge protection - Google Patents
A kind of liquid crystal display screen of mobile phone with charge protection Download PDFInfo
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- CN209265998U CN209265998U CN201920124657.7U CN201920124657U CN209265998U CN 209265998 U CN209265998 U CN 209265998U CN 201920124657 U CN201920124657 U CN 201920124657U CN 209265998 U CN209265998 U CN 209265998U
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Abstract
The utility model relates to a kind of liquid crystal display screen of mobile phone with charge protection; including display screen ontology, the connector for being connected to mobile phone charge port, current collector, current detection circuit, current status display circuit; current detection circuit includes current comparison circuit and current reference circuit; current comparison circuit receives current signal and exports electric current comparison signal; current reference circuit receives electric current comparison signal and reminds display to realize for providing upper current limit signal, current status display circuit；Current status display circuit includes luminous prompting circuit and sound production prompt circuit, and luminous prompting circuit receives low level electric current comparison signal to realize luminous prompting；Sound production prompt circuit receives the electric current comparison signal of high level to realize sound production prompt.The utility model can real-time judge charging current size, and by sound production prompt circuit timely sound production prompt when charging current is excessive, advantageously reduce display screen ontology because charging current is excessive damage the case where.
Description
Technical field
The utility model relates to the technical fields of mobile phone display screen, more particularly, to a kind of mobile phone liquid crystal with charge protection
Display screen.
Background technique
With the raising of economic level, mobile phone is increasingly becoming the necessity in everyone life, in daily life, more
People indulge in cell phone network, mobile phone games etc., and during addiction it is easier that hand self-contained battery electricity reduce it is too fast,
Need to charge to mobile phone at this time, and it is most artificially seek conveniently, it is any using with my mobile phone is inconsistent fills
Electric appliance charges, and since the charger of every mobile phone institute standard configuration has corresponding potential device, controllably makes opponent's machine battery
Charging current, and during once being charged using inconsistent charger, potential device easily occur can not will charge
Voltage drop, so that the electric current that interior of mobile phone is born is excessive, leads to mobile phone down to the case where charging for current phone
Damage.
Utility model content
The purpose of the utility model is to provide a kind of liquid crystal display screen of mobile phone with charge protection, can charge in interior of mobile phone
The excessive carry out sound production prompt of electric current, advantageously reduce mobile phone because charging current is excessive damage the case where.
The above-mentioned purpose of utility model of the utility model has the technical scheme that a kind of band charger
The liquid crystal display screen of mobile phone of shield, including display screen ontology, one end of the display screen ontology, which is equipped with, is connected to mobile phone charge port
Connector, the connector are equipped with protective device, and the protective device includes current collector, current detection circuit, current status
Display circuit, the current collector are used to be converted to electric current physical quantity current signal, and the current detection circuit includes electricity
Stream comparison circuit and current reference circuit, the current comparison circuit are coupled to the current collector to receive current signal simultaneously
Electric current comparison signal is exported, the current reference circuit causes display screen ontology to damage for providing upper current limit signal
Current overload value, the current status display circuit are coupled to the current comparison circuit to receive electric current comparison signal and respond
Display is reminded in electric current comparison signal to realize；The current status display circuit includes luminous prompting circuit and sound production prompt electricity
Road, the luminous prompting circuit for receive low level electric current comparison signal and in response to low level electric current comparison signal with
Realize luminous prompting；The sound production prompt circuit is used to receive the electric current comparison signal of high level and the electric current in response to high level
Comparison signal is to realize sound production prompt；
When current signal is less than upper current limit signal, current comparison circuit exports low level electric current comparison signal and touches
It sends out luminous prompting circuit and carries out luminous prompting；When current signal is greater than upper current limit signal, the high electricity of current comparison circuit output
Flat electric current comparison signal simultaneously triggers sound production prompt circuit progress sound production prompt.
By using above-mentioned technical proposal, during display screen is installed on mobile phone, by current reference portion to mobile phone
The current maxima that can bear during the charging process is configured, and during mobile phone is charged, current collector will
The electric current of charging is converted to current signal and is transferred to current comparison circuit, and in real time and on the electric current that provides on current reference circuit
Limit signal is compared, if the current signal of acquisition is less than upper current limit signal, exports low level electric current comparison signal, is sent out
Light cue circuit carries out luminous, indicates that the charging situation of current phone is normal, if otherwise the current signal of acquisition be greater than on electric current
Signal is limited, then exports the electric current comparison signal of high level, sound production prompt circuit carries out sounding, indicates the charging current of current phone
It is excessive；It is this to acquire the electric current in charging process in real time by the way that current collector is arranged, and carried out in fact by current detection circuit
When detection judgement, later by sound production prompt circuit timely sound production prompt when charging current is excessive, advantageously reduce mobile phone because
Charging current is excessive and the case where damage.
Preferably, the luminous prompting circuit includes not circuit, light emitting diode, and the not circuit is coupled to described
The output end of current comparison circuit is to receive electric current comparison signal, only when electric current comparison signal is low level, the NOT gate electricity
Road exports trigger signal, and the light emitting diode receives trigger signal and carries out luminous prompting in response to trigger signal.
Low level electric current comparison signal is converted to by the way that not circuit is arranged by using above-mentioned technical proposal
The trigger signal of high level, to trigger the work of light emitting diode in time.
Preferably, the sound production prompt circuit includes switching circuit, sounding alarm, and the switching circuit is coupled to described
The output end of current comparison circuit is to receive electric current comparison signal, only when electric current comparison signal is high level, the switch electricity
Road exports enabling signal, and the sounding alarm receives enabling signal and carries out sound production prompt in response to enabling signal.
By using above-mentioned technical proposal, the electric current comparison signal of high level is received by setting switching circuit, and defeated
Switching signal triggering sounding alarm work out.
Preferably, the switching circuit includes the base stage of resistance R3, triode Q1, the triode Q1 by resistance R3 coupling
It is connected to the output end of the current comparison circuit, the emitter ground connection of the triode Q1, collector is coupled to sounding alarm
And export enabling signal.
By using above-mentioned technical proposal, the electric current comparison signal received is carried out by setting triode Q1 certain
Buffering, to prevent electric current comparison signal rapidly enters sounding alarm and leads to the damage of sounding alarm.
Preferably, the sound production prompt circuit further includes interval signal output circuit, the interval signal output circuit coupling
Switching circuit is connected to receive enabling signal and export discontinuous trigger signal, the sounding alarm receives discontinuous triggering letter
Number carry out discontinuous auditory tone cues.
By using above-mentioned technical proposal, output circuit is interrupted by setting signal, so that sounding alarm discontinuous connects
Discontinuous trigger signal is received, so that the effect during audible alarm is more obvious.
Preferably, the interval signal output circuit includes including 555 timers, resistance R4, R5, capacitor C1, C2 555
One end of 4 feet of timer, 8 feet and resistance R4 is coupled to switching circuit, and the other end of resistance R5 is coupled to 555 timers
3 feet, one end of resistance R5 and sounding alarm, the other end of resistance R5 are coupled to 2 feet, 6 feet and capacitor of 555 timers
One end of C2, the other end of capacitor C2 are coupled to 1 foot of 555 timers and are grounded, and 5 feet of 555 timers pass through capacitor C1
Ground connection.
By using above-mentioned technical proposal, by the way that 555 timers are arranged, to set the time of discontinuous trigger signal output
Interval.
Preferably, the sound production prompt circuit further includes signal amplification circuit, and the signal amplification circuit is coupled to described
Interval signal output circuit is to receive discontinuous trigger signal and carry out signal amplification.
Letter by using above-mentioned technical proposal, by setting signal amplifying circuit to be exported to interval signal output circuit
It number amplifies.
Preferably, the signal amplification circuit includes signal amplifier IC1, resistance R6, R7, the signal amplifier IC1
In-phase end be coupled to the output end of the interval signal output circuit, reverse side is coupled to one end of resistance R6, resistance R6's
Other end ground connection, resistance R7 are series between the reverse side and output end of signal amplifier IC1, the signal amplifier IC1's
Output end is coupled to the sounding alarm.
By using above-mentioned technical proposal, put after receiving discontinuous trigger signal by setting signal amplifier
Greatly, it works in order to quickly trigger voice-control alarm portion.
In conclusion the advantageous effects of the utility model are as follows:
The electric current in charging process is acquired in real time by the way that current collector is arranged, and is carried out in real time by current detection circuit
Detection judgement advantageously reduces mobile phone because filling later by sound production prompt circuit timely sound production prompt when charging current is excessive
Electric current is excessive and the case where damage.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the electrical block diagram of the utility model.
In figure, 1, display screen ontology；11, connector；2, protective device；3, current collector；4, current detection circuit；41,
Current comparison circuit；42, current reference circuit；5, current status display circuit；51, luminous prompting circuit；511, not circuit；
512, light emitting diode；52, sound production prompt circuit；521, switching circuit；522, sounding alarm；6, interval signal output electricity
Road；7, signal amplification circuit.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
It referring to Fig.1, is a kind of liquid crystal display screen of mobile phone with charge protection disclosed by the utility model, including display screen sheet
Body 1, one end of display screen ontology 1 are equipped with the connector 11 for being connected to mobile phone charge port, side wall of the display screen ontology 1 close to connector 11
It is interior to be equipped with protective device 2.
Referring to Fig.1, Fig. 2, protective device 2 include current collector 3, current detection circuit 4, current status display circuit 5；
Current collector 3 is preferably Hall current sensor, and the model of Hall current sensor is preferably HKA-3YSD, Hall current
Sensor is used to acquire the electric current in mobile phone charging process and for electric current physical quantity to be converted to current signal.
Current detection circuit 4 includes current comparison circuit 41 and current reference circuit 42, and current comparison circuit 41 is coupled to
Current collector 3 is to receive current signal and export electric current comparison signal, and current reference circuit 42 is for providing upper current limit letter
Number, upper current limit signal is the current overload value for causing display screen ontology 1 to damage.
Current comparison circuit 41 includes resistance R1, comparator A1, and the model of comparator A1 is preferably LM324, comparator A1
In-phase end Hall current sensor is coupled to receive current signal by resistance R1, the reverse side of comparator A1 is coupled to electricity
Flow reference circuit 42；Current reference circuit 42 includes resistance R2 and potentiometer Rp1, and the model of potentiometer Rp1 is
3296X-502, one end of resistance R2 are coupled to Vcc voltage, and the other end is coupled to the reverse side and potentiometer of comparator A1
The other end of Rp1, potentiometer Rp1 are grounded；Tie point between resistance R2 and potentiometer Rp1 provides upper limit signal Vref1, passes through
Adjust the size of the adjustable upper limit signal Vref1 of potentiometer Rp1.When the current signal of Hall current sensor output reaches electricity
When flowing upper limit signal value, the electric current comparison signal of the output end output high level of comparator A1, conversely, then exporting low level electricity
Flow comparison signal.
Current status display circuit 5 is coupled to current comparison circuit 41 to receive electric current comparison signal and in response to electric current ratio
Display is reminded compared with signal to realize；Current status display circuit 5 includes luminous prompting circuit 51 and sound production prompt circuit 52, is shone
Cue circuit 51 is for receiving low level electric current comparison signal and luminous to realize in response to low level electric current comparison signal
Prompt；Sound production prompt circuit 52 be used for receive high level electric current comparison signal and in response to the electric current comparison signal of high level with
Realize sound production prompt.
Luminous prompting circuit 51 includes not circuit 511, light emitting diode 512, and not circuit 511 includes reverser IC1,
The model SN74LVC1G04 of inverter ic 1, the input terminal of reverser IC1 be coupled to the output end of current comparison circuit 41 with
Electric current comparison signal is received, the output end of reverser IC1 is coupled to the anode tap of light emitting diode 512, light emitting diode 512
Cathode terminal ground connection, only when electric current comparison signal is low level, low level electric current comparison signal is switched to height by reverser IC1
The electric current comparison signal of level simultaneously exports, and light emitting diode 512 receives high level of current comparison signal and in response to high level electricity
It flows comparison signal and carries out luminous prompting, the charging situation to indicate mobile phone is normal.
Sound production prompt circuit 52 includes switching circuit 521, interval signal output circuit 6, signal amplification circuit 7 and sounding report
Alert device 522, switching circuit 521 are coupled to the output end of current comparison circuit 41 to receive electric current comparison signal, only when electric current ratio
Compared with signal be high level when, switching circuit 521 export enabling signal, interval signal output circuit 6 be coupled to switching circuit 521 with
It receives enabling signal and exports discontinuous trigger signal, between signal amplification circuit 7 is coupled to interval signal output circuit 6 to receive
Disconnected formula trigger signal simultaneously carries out signal amplification, and sounding alarm 522 is coupled to signal amplification circuit 7 to receive by amplified
Discontinuous trigger signal simultaneously carries out sound production prompt.
Switching circuit 521 includes resistance R3, triode Q1, and the base stage of triode Q1 is coupled to electric current by resistance R3 and compares
The output end of circuit 41, the emitter ground connection of triode Q1, collector are coupled to interval signal output circuit 6 and export starting letter
Number.
Interval signal output circuit 6 includes including 555 timers, resistance R4, R5, capacitor C1, C2 the 4 of 555 timers
One end of foot, 8 feet and resistance R4 is coupled to the collector of triode Q1, and the other end of resistance R5 is coupled to the 3 of 555 timers
Foot, one end of resistance R5 and signal amplification circuit 7, the other end of resistance R5 are coupled to 2 feet, 6 feet and electricity of 555 timers
Hold one end of C2, the other end of capacitor C2 is coupled to 1 foot of 555 timers and is grounded, and 5 feet of 555 timers pass through capacitor
C1 ground connection.
Signal amplification circuit 7 includes signal amplifier IC1, resistance R6, R7, and the in-phase end of signal amplifier IC1 is coupled to
The output end of interval signal output circuit 6, reverse side are coupled to one end of resistance R6, the other end ground connection of resistance R6, resistance R7
It is series between the reverse side and output end of signal amplifier IC1, the output end of signal amplifier IC1 is coupled to sounding alarm
522 one end, the other end ground connection of sounding alarm 522.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (8)
1. a kind of liquid crystal display screen of mobile phone with charge protection, including display screen ontology (1), the one of the display screen ontology (1)
End is equipped with the connector (11) for being connected to mobile phone charge port, it is characterised in that: the connector (11) is equipped with protective device (2), institute
Stating protective device (2) includes current collector (3), current detection circuit (4), current status display circuit (5), and the electric current is adopted
Storage (3) is used to electric current physical quantity being converted to current signal, and the current detection circuit (4) includes current comparison circuit (41)
And current reference circuit (42), the current comparison circuit (41) are coupled to the current collector (3) to receive current signal
And electric current comparison signal is exported, the current reference circuit (42) leads to display screen ontology for providing upper current limit signal
(1) the current overload value damaged, the current status display circuit (5) are coupled to the current comparison circuit (41) to receive electricity
Stream comparison signal simultaneously reminds display in response to electric current comparison signal to realize；The current status display circuit (5) includes shining
Cue circuit (51) and sound production prompt circuit (52), the luminous prompting circuit (51) compare letter for receiving low level electric current
Number and in response to low level electric current comparison signal to realize luminous prompting；The sound production prompt circuit (52) is for receiving high electricity
Flat electric current comparison signal and in response to the electric current comparison signal of high level to realize sound production prompt；
When current signal is less than upper current limit signal, current comparison circuit (41) exports low level electric current comparison signal and touches
It sends out luminous prompting circuit (51) and carries out luminous prompting；When current signal is greater than upper current limit signal, current comparison circuit (41)
It exports the electric current comparison signal of high level and triggers sound production prompt circuit (52) and carry out sound production prompt.
2. a kind of liquid crystal display screen of mobile phone with charge protection according to claim 1, it is characterised in that: described shine mentions
Show that circuit (51) includes not circuit (511), light emitting diode (512), the not circuit (511) is coupled to the electric current ratio
Compared with circuit (41) output end to receive electric current comparison signal, only when electric current comparison signal be low level when, the not circuit
(511) trigger signal is exported, the light emitting diode (512) receives trigger signal and shine in response to trigger signal and mentions
Show.
3. a kind of liquid crystal display screen of mobile phone with charge protection according to claim 1, it is characterised in that: the sounding mentions
Show that circuit (52) includes switching circuit (521), sounding alarm (522), the switching circuit (521) is coupled to the electric current ratio
Compared with circuit (41) output end to receive electric current comparison signal, only when electric current comparison signal be high level when, the switching circuit
(521) enabling signal is exported, the sounding alarm (522) receives enabling signal and carries out sounding in response to enabling signal and mentions
Show.
4. a kind of liquid crystal display screen of mobile phone with charge protection according to claim 3, it is characterised in that: the switch electricity
Road (521) includes resistance R3, triode Q1, and the base stage of the triode Q1 is coupled to the current comparison circuit by resistance R3
(41) output end, the emitter ground connection of the triode Q1, collector are coupled to sounding alarm (522) and export starting letter
Number.
5. a kind of liquid crystal display screen of mobile phone with charge protection according to claim 3, it is characterised in that: the sounding mentions
Show that circuit (52) further includes interval signal output circuit (6), the interval signal output circuit (6) is coupled to switching circuit
(521) to receive enabling signal and export discontinuous trigger signal, the sounding alarm (522) receives discontinuous trigger signal
Carry out discontinuous auditory tone cues.
6. a kind of liquid crystal display screen of mobile phone with charge protection according to claim 5, it is characterised in that: the interruption letter
Number output circuit (6) includes 555 timers, resistance R4, R5, capacitor C1, C2,4 feet of 555 timers, 8 feet and resistance R4
One end is coupled to switching circuit (521), and the other end of resistance R5 is coupled to 3 feet of 555 timers, one end of resistance R5 and hair
Sound alarm subsystem (522), the other end of resistance R5 are coupled to one end of 2 feet of 555 timers, 6 feet and capacitor C2, capacitor C2's
The other end is coupled to 1 foot of 555 timers and is grounded, and 5 feet of 555 timers are grounded by capacitor C1.
7. a kind of liquid crystal display screen of mobile phone with charge protection according to claim 5, it is characterised in that: the sounding mentions
Show that circuit (52) further includes signal amplification circuit (7), the signal amplification circuit (7) is coupled to the interval signal output circuit
(6) to receive discontinuous trigger signal and carry out signal amplification.
8. a kind of liquid crystal display screen of mobile phone with charge protection according to claim 7, it is characterised in that: the signal is put
Big circuit (7) includes signal amplifier IC1, resistance R6, R7, and the in-phase end of the signal amplifier IC1 is coupled to the interruption
The output end of signal output apparatus (6), reverse side are coupled to one end of resistance R6, the other end ground connection of resistance R6, resistance R7 string
It is coupled between the reverse side and output end of signal amplifier IC1, the output end of the signal amplifier IC1 is coupled to the sounding
Alarm (522).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920124657.7U CN209265998U (en) | 2019-01-23 | 2019-01-23 | A kind of liquid crystal display screen of mobile phone with charge protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920124657.7U CN209265998U (en) | 2019-01-23 | 2019-01-23 | A kind of liquid crystal display screen of mobile phone with charge protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209265998U true CN209265998U (en) | 2019-08-16 |
Family
ID=67584828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920124657.7U Expired - Fee Related CN209265998U (en) | 2019-01-23 | 2019-01-23 | A kind of liquid crystal display screen of mobile phone with charge protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209265998U (en) |
-
2019
- 2019-01-23 CN CN201920124657.7U patent/CN209265998U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190816 Termination date: 20200123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |