CN206311923U - Remote controller control circuit with backlight screen - Google Patents
Remote controller control circuit with backlight screen Download PDFInfo
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- CN206311923U CN206311923U CN201621284090.2U CN201621284090U CN206311923U CN 206311923 U CN206311923 U CN 206311923U CN 201621284090 U CN201621284090 U CN 201621284090U CN 206311923 U CN206311923 U CN 206311923U
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- power supply
- triode
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- 230000011664 signaling Effects 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The utility model discloses a remote controller control circuit with a backlight screen, which comprises a key circuit, a code sending circuit and a power supply booster circuit, wherein the power supply booster circuit boosts the power supply voltage to supply power to the backlight; the backlight switch circuit is used for controlling the on and off of the backlight lamp; the MCU control circuit is used for receiving or outputting signals to control the circuit and drive the LCD, and the MCU power supply circuit; the key circuit and the code sending circuit are connected with the MCU, the input end of the booster circuit is connected with the power supply, the output end of the booster circuit is connected with the backlight lamp, the control end of the backlight switch circuit is connected with the MCU, the input end of the MCU power supply circuit is connected with the power supply, and the output end of the MCU power supply circuit is connected with the MCU; the boosting circuit is also connected with the MCU, and the output voltage of the boosting circuit is controlled by the PWM signal output by the MCU; the utility model provides a remote controller control circuit with backlight screen, it uses boost circuit to replace DC/DC power chip that steps up to it is longer to have solved remote controller automatic re-setting problem and battery life.
Description
Technical field
The utility model is related to remote control, more particularly to a kind of remote control control circuit with backlight screen.
Background technology
The currently marketed remote control with backlight screen, most of use is all the back of the body of the driving voltage in more than 2.4V
Light source, such as white backlight；Its control circuit on be required for DC/DC booster powers chip carry out boosting could realize it is bright during signaling
Screen function, but DC/DC booster power chip costs are higher, and in use, the phenomenon that automatically resets and battery
Fall short of, the competitiveness in influence product market.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of remote control with backlight screen
Control circuit, it replaces DC/DC booster power chips using the booster circuit without integrated chip, serves same boosting and makees
With, and solve remote control and automatically reset problem, and battery is compared to longer.
The purpose of this utility model is realized using following technical scheme：
A kind of remote control control circuit with backlight screen, it is characterised in that：Including key circuit, for will be key controlled
Be converted to electric signal；Signaling circuit, for launching infrared signal；Power boost circuit, by supply voltage boosting output to the back of the body
Light lamp is powered；Sample circuit, samples and exports MCU for the output voltage to booster circuit；Backlight switch circuit, for controlling
Backlight processed is lighted and extinguished；MCU control circuit, above circuit is controlled for reception or output signal and LCD is driven, with
And MCU power supply circuits, for being powered to MCU；The key circuit, signaling circuit are connected with MCU；The booster circuit input
End is connected with power supply, and control end is connected with MCU, for receiving the pwm signal of MCU outputs and then controlling boost voltage value,
Output end is connected with backlight one end, sample circuit, MCU power supply circuits；The sample circuit output end is connected with MCU；
The backlight switch circuit is connected with the other end of backlight, and control end is connected with MCU, the PWM for receiving MCU outputs
Signal controls backlight switch circuit turn-on；The MCU power supply circuits first input end connects power supply, and the connection of the second input rises
Volt circuit output end, powers for booster voltage to MCU, output end connection MCU.
Preferably, the booster circuit includes the first inductance L1, first resistor R1, the first diode D1, the first triode
Q1, the first electric capacity C1 and the second electric capacity C2, first inductance L1 one end are connected with power supply, the first inductance L1 other ends and the one or two pole
The colelctor electrode of the anode of pipe D1 and the first triode Q1 is connected jointly, the negative electrode of the first diode D1 and first electric capacity C1 one end
Connection, the second electric capacity C2 is connected in parallel on the first electric capacity C1 two ends, and the base stage of the first triode Q1 is connected with first resistor R1, the first electricity
The resistance R1 other ends are connected with MCU, and the emitter stage of the first triode Q1 is connected and is grounded with the first electric capacity C1 other ends.
Preferably, the backlight switch circuit includes second resistance R2, the second electric capacity C2, the second diode D2 and the two or three
The negative electrode and second resistance R2, the second triode Q2 of anode the connection MCU, the second diode D2 of pole pipe Q2, the second diode D2
Base stage sequential series, second electric capacity C2 one end is connected with the second diode D2 with second resistance R2 junctions, the other end and
The emitter stage of two triode Q2 is connected and is grounded, and the colelctor electrode of the second triode Q2 is connected with backlight one end.
Preferably, the MCU power supply circuits include the 3rd diode D3, the 3rd triode Q3 and 3rd resistor R3；The
The anode of three diode D3 connects with power supply, and MCU connects jointly with the negative electrode of the 3rd diode D3 and the emitter stage of the 3rd triode Q3
Connect, the base stage of the 3rd triode Q3 is connected with 3rd resistor R3, the other end of 3rd resistor R3 is connected with the backlight other end, the
The colelctor electrode of three triode Q3 is connected with the output end of booster circuit.
Preferably, the sample circuit includes the 5th resistance R5 and the 6th resistance R6 connected with the 5th resistance R5, the
The five resistance R5 other ends are connected with booster circuit output end, the 3rd triode Q3 in the other end and backlight switch circuit of R6
It is connected, sample circuit output end is connected between the 5th resistance R5 and the 6th resistance R6.
Preferably, the MCU is the chip of the auspicious Sa RL78/L12 series of model.
Compared to existing technology, the beneficial effects of the utility model are：Power boost is instead of by setting booster circuit
Chip realizes boost function；By setting sample circuit so that boost output voltage value is more stable；Powered electricity by setting MCU
Road, it is voltage boosting and stabilizing circuit that MCU power supplies are switched in signaling, it is to avoid signaling is that cell voltage is too low causes MCU to reset, this
Sample can also work when cell voltage is relatively low, extend battery life.
Brief description of the drawings
Fig. 1 is a kind of remote control control circuit structure block diagram with backlight screen in the utility model embodiment；
Fig. 2 be Fig. 1 in booster circuit, backlight switch circuit, sample circuit, LED backlight and MCU power supply circuits it is mutual
The circuit theory diagrams of connection；
The circuit theory diagrams that Fig. 3 is the MCU control circuit of Fig. 1, signaling circuit and LCD are connected；
Fig. 4 is the circuit theory diagrams of the key circuit of Fig. 1；
In figure：10th, key circuit；20th, signaling circuit；30th, MCU control circuit；40th, MCU power supply circuits；50th, piezoelectricity is risen
Road；60th, sample circuit；70th, backlight switch circuit；80th, LED backlight；90、LCD；VCC, supply voltage；VDD, MCU work electricity
Pressure；Vboot, boost output voltage.
Specific embodiment
Below, with reference to accompanying drawing and specific embodiment, the utility model is described further：
Such as Fig. 1, a kind of remote control control circuit with backlight screen, including key circuit 10, for by key controlled turn
It is changed to electric signal；Signaling circuit 20, for launching infrared signal；Power boost circuit 50, supply voltage VCC is boosted and is exported
Powered to LED backlight 80, the utility model is preferably LED backlight, other have the backlight of said function parameter
It is applicable；Sample circuit 60, samples and exports MCU for the output voltage to booster circuit；Backlight switch circuit 70, for controlling
LED backlight processed 80 is lighted and extinguished；MCU control circuit 30, above circuit and drive are controlled for reception or output signal
Dynamic LCD 90, and MCU power supply circuits 40, for being powered to MCU；The key circuit 10, signaling circuit 20 are connected with MCU
Connect；The input of the booster circuit 50 is connected with power supply, and control end is connected with MCU, the PWM letters for receiving MCU outputs
Number so control boost voltage value, output end is connected with LED backlight one end, sample circuit, MCU power supply circuits；It is described to adopt
Sample circuit output end is connected with MCU；The backlight switch circuit is connected with the other end of LED backlight, control end and MCU
It is connected, backlight switch circuit turn-on is controlled for receiving the pwm signal of MCU outputs；The MCU power supply circuits first are input into
End connection power supply, the second input connection booster circuit output end, powers for booster voltage to MCU, output end connection MCU.
During user's remote control, the button in circuit is pushed button, after MCU obtains respective operations command signal, MCU outputs PWM
Signal to booster circuit and the control end of backlight switch circuit, the conducting of backlight switch contactor, backlight ground connection, booster circuit
Exported after supply voltage is boosted, sample circuit is sampled to booster circuit output voltage, sampled value is returned into MCU, MCU leads to
Comparison setting voltage value scope is crossed, adjusts pwm signal dutycycle further to control boost voltage value, make booster voltage value stabilization
In a scope, the driving voltage of stabilization is provided to backlight, light backlight；Booster circuit output voltage also passes through simultaneously
MCU power supply circuits are powered to MCU.
Such as Fig. 2, booster circuit includes the first inductance L1, first resistor R1, the first diode D1, the first triode Q1, the
One electric capacity C1 and the second electric capacity C2, first inductance L1 one end is connected with power supply, the first inductance L1 other ends and the first diode D1
Anode and the colelctor electrode of the first triode Q1 connect jointly, the negative electrode of the first diode D1 and first electric capacity C1 one end connect
Connect, the second electric capacity C2 is connected in parallel on the first electric capacity C1 two ends, the base stage of the first triode Q1 is connected with first resistor R1, first resistor
The R1 other ends are connected with MCU, and the emitter stage of the first triode Q1 is connected and is grounded with the first electric capacity C1 other ends.
MCU output PWM square-wave signals control the first triode by the base stage of the triodes of first resistor R1 to first Q1
The ON-OFF of Q1, is grounded when the first triode Q1 is turned on, and power supply VCC charges to the first inductance L1, the first inductance L1 storage electricity
Can, when the first triode Q1 end, on inductance L1 during forward voltage drop sum more than VCC and D1, the first inductance L1 passes through the
One the first electric capacity of diode pair, the second electric capacity charge, and constantly repeat ON-OFF process, realize basic boost function.By rising
The design of volt circuit is aided with the boost function that MCU output pwm signals are realized, so as to instead of conventional use power boost core
Piece.
Backlight switch circuit includes second resistance R2, the second electric capacity C2, the second diode D2 and the second triode Q2, second
The negative electrode of anode the connection MCU, the second diode D2 of diode D2 is gone here and there with the base stage order of second resistance R2, the second triode Q2
Connection, second electric capacity C2 one end is connected with the second diode D2 with second resistance R2 junctions, the other end and the second triode Q2's
Emitter stage is connected and is grounded, and the colelctor electrode of the second triode Q2 is connected with backlight one end.
MCU output pwm signals are also transported to backlight switch circuit simultaneously to booster circuit, and pwm signal is by the two or two pole
Pipe D2, the base stage of the triodes of second resistance R2 to second Q2 turn on the second triode Q2, due to the transmitting of the second triode Q2
Pole is grounded, that is, realize the conducting between the colelctor electrode and ground of the second triode Q2.The colelctor electrode and LED-backlit of the second triode Q2
Lamp one end connects, and the LED other ends are connected with booster circuit output end, when the second triode Q2 conductings, the collection of the second triode Q2
Electrode is grounded, and LED backlight both end voltage is more than LED driving voltages, and LED backlight is lighted, when the second triode Q2 cut-offs, the
The colelctor electrode of two triode Q2 connects booster circuit output end, and LED backlight both end voltage is less than LED driving voltages, LED backlight
Do not light.Supply voltage is reached by the design of backlight switch circuit to boost while lighting the control of LED backlight.
Sample circuit includes that the 5th resistance R5 and the 6th resistance R6 connected with the 5th resistance R5, the 5th resistance R5 are another
End is connected with booster circuit output end, and the other end of R6 is connected with the 3rd triode Q3 in backlight switch circuit, sampling
Circuit output end is connected between the 5th resistance R5 and the 6th resistance R6.
Sample circuit to booster circuit output voltage Vboot by the 5th resistance R5, that the 6th resistance R6 carries out partial pressure is laggard
Row magnitude of voltage is sampled, and collection voltages value is R6*Vboot/ (R5+R6), in output to MCU, is compared with range of set value,
Such as larger than range of set value, then MCU is by PID arithmetic, reduces the dutycycle of output pwm signal, such as less than range of set value, then
MCU increases the dutycycle of output pwm signal by PID arithmetic, the voltage range until reaching our settings.Adopted by setting
The feedback of sample circuit, booster voltage can obtain Real-time Feedback regulation, and booster voltage exports more stable power supply.
MCU power supply circuits include the 3rd diode D3, the 3rd triode Q3 and 3rd resistor R3；3rd diode D3's
Anode connects with power supply, and MCU is connected jointly with the negative electrode of the 3rd diode D3 and the emitter stage of the 3rd triode Q3, the 3rd triode
The base stage of Q3 is connected with 3rd resistor R3, and the other end of 3rd resistor R3 is connected with the backlight other end, the 3rd triode Q3's
Colelctor electrode is connected with the output end of booster circuit.
When being not required to operational and controlled key button and carrying out signaling, MCU not output pwm signal, LED backlight cut-off state, booster circuit
Do not run, output voltage very little, the 3rd triode Q3 cut-off, now MCU supply voltages VDD by power supply VCC by the three or two pole
Pipe is powered；When signaling, MCU output pwm signals, Q3 conductings, when booster circuit output voltage is more than supply voltage 0.3V
When, MCU operating voltages VDD is powered by booster circuit output voltage, when booster circuit output voltage is less than supply voltage 0.3V,
MCU operating voltages are powered by power supply.By setting MCU power supply circuits so that MCU supply voltages can be automatically switched in signaling
Power voltage supply pattern higher, it is to avoid battery voltage instantaneous reduction in signaling, when transient voltage causes less than MCU supply voltages
The problem that MCU resets.
As Fig. 3, Fig. 4, the button two ends in key circuit are connected with MCU, respective operations are obtained by operating button, MCU
Command signal, starts MCU output pwm signals and exports high level drive signal to signaling circuit, and the LED in signaling circuit is carried out
Launch the infrared control signal of certain frequency；Preferably, MCU is the chip of the auspicious Sa RL78/L12 series of model.
In the utility model embodiment, beneficial effect is：It is aided with MCU output PWM controls by setting booster circuit
Boosting is realized, be instead of and used the circuit of power boost chip；Sample circuit feedback MCU is set on this basis again to be adjusted
PWM duty cycle adjusts booster voltage, obtains more stable booster voltage scope；By setting backlight switch circuit, realize rising
Pressure lights backlight simultaneously；By setting MCU power supply circuits, switching MCU power supplies can be made in signaling boosting, it is to avoid battery
Use long, reset phenomenon caused by MCU supply voltages are too low during signaling.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection of the utility model claim
Within the scope of.
Claims (6)
1. a kind of remote control control circuit with backlight screen, it is characterised in that including：Key circuit, for will be key controlled
Be converted to electric signal；Signaling circuit, for launching infrared signal；Power boost circuit, by supply voltage boosting output to the back of the body
Light lamp is powered；Sample circuit, samples and exports MCU for the output voltage to booster circuit；Backlight switch circuit, for controlling
Backlight processed is lighted and extinguished；MCU control circuit, above circuit is controlled for reception or output signal and LCD is driven；With
And MCU power supply circuits, for being powered to MCU；The key circuit, signaling circuit are connected with MCU；
The booster circuit input is connected with power supply；The booster circuit control end is connected with MCU, for receiving MCU
The pwm signal and then control boost voltage value of output；The booster circuit output end is input into backlight one end, sample circuit
End, MCU power supply circuits are connected；The sample circuit output end is connected with MCU；The backlight switch circuit and backlight
The other end is connected；Control end is connected with MCU, controls backlight switch circuit to lead for receiving the pwm signal of MCU outputs
It is logical；The MCU power supply circuits first input end connects power supply；The input of the MCU power supply circuits second connection booster circuit is defeated
Go out end, powered to MCU for booster voltage, the MCU power supply circuits output end connects MCU.
2. a kind of remote control control circuit with backlight screen according to claim 1, it is characterised in that described liter of piezoelectricity
Road includes the first inductance L1, first resistor R1, the first diode D1, the first triode Q1, the first electric capacity C1 and the second electric capacity C2,
First inductance L1 one end is connected with power supply, the anode and the first triode Q1 of the first inductance L1 other ends and the first diode D1
Colelctor electrode connect jointly, the negative electrode of the first diode D1 is connected with first electric capacity C1 one end, and the second electric capacity C2 is connected in parallel on first
Electric capacity C1 two ends, the base stage of the first triode Q1 is connected with first resistor R1, and the first resistor R1 other ends are connected with MCU, and first
The emitter stage of triode Q1 is connected and is grounded with the first electric capacity C1 other ends.
3. a kind of remote control control circuit with backlight screen according to claim 2, it is characterised in that the backlight is opened
Powered-down road includes second resistance R2, the second electric capacity C2, the second diode D2 and the second triode Q2, the anode of the second diode D2
The negative electrode and second resistance R2, the base stage sequential series of the second triode Q2, the second electric capacity C2 of connection MCU, the second diode D2
One end is connected with the second diode D2 with second resistance R2 junctions, and the other end is connected and connects with the emitter stage of the second triode Q2
Ground, the colelctor electrode of the second triode Q2 is connected with backlight one end.
4. a kind of remote control control circuit with backlight screen according to claim 3, it is characterised in that the MCU is supplied
Circuit includes the 3rd diode D3, the 3rd triode Q3 and 3rd resistor R3；The anode of the 3rd diode D3 connects with power supply,
MCU is connected jointly with the negative electrode of the 3rd diode D3 and the emitter stage of the 3rd triode Q3, the base stage of the 3rd triode Q3 and the
Three resistance R3 are connected, and the other end of 3rd resistor R3 is connected with the backlight other end, colelctor electrode and the boosting of the 3rd triode Q3
The output end connection of circuit.
5. a kind of remote control control circuit with backlight screen according to claim 3, it is characterised in that the sampling electricity
Road includes the 5th resistance R5 and the 6th resistance R6 connected with the 5th resistance R5, and the 5th resistance R5 other ends are defeated with booster circuit
Go out end to be connected, the other end of R6 is connected with the 3rd triode Q3 in backlight switch circuit, the connection of sample circuit output end
Between the 5th resistance R5 and the 6th resistance R6.
6. according to a kind of remote control control circuit with backlight screen that one of claim 1-5 is described, it is characterised in that described
MCU is the chip of the auspicious Sa RL78/L12 series of model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621284090.2U CN206311923U (en) | 2016-11-25 | 2016-11-25 | Remote controller control circuit with backlight screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621284090.2U CN206311923U (en) | 2016-11-25 | 2016-11-25 | Remote controller control circuit with backlight screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206311923U true CN206311923U (en) | 2017-07-07 |
Family
ID=59250177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621284090.2U Active CN206311923U (en) | 2016-11-25 | 2016-11-25 | Remote controller control circuit with backlight screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206311923U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106354075A (en) * | 2016-11-25 | 2017-01-25 | 北京意同创科技有限公司 | Remote controller control circuit with backlight screen |
| CN110572918A (en) * | 2019-09-17 | 2019-12-13 | Tcl空调器(中山)有限公司 | remote controller backlight adjusting method and device and storage medium |
| CN113937856A (en) * | 2021-10-16 | 2022-01-14 | 深圳市海曼科技股份有限公司 | System and method for preventing singlechip in battery power supply equipment from being reset due to voltage reduction |
| CN116954114A (en) * | 2023-06-25 | 2023-10-27 | 江苏宿芯半导体有限公司 | MCU controller with LCD drive |
-
2016
- 2016-11-25 CN CN201621284090.2U patent/CN206311923U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106354075A (en) * | 2016-11-25 | 2017-01-25 | 北京意同创科技有限公司 | Remote controller control circuit with backlight screen |
| CN106354075B (en) * | 2016-11-25 | 2020-01-21 | 北京意同创科技有限公司 | Remote controller control circuit with backlight screen |
| CN110572918A (en) * | 2019-09-17 | 2019-12-13 | Tcl空调器(中山)有限公司 | remote controller backlight adjusting method and device and storage medium |
| CN113937856A (en) * | 2021-10-16 | 2022-01-14 | 深圳市海曼科技股份有限公司 | System and method for preventing singlechip in battery power supply equipment from being reset due to voltage reduction |
| CN113937856B (en) * | 2021-10-16 | 2023-03-24 | 深圳市海曼科技股份有限公司 | System and method for preventing singlechip in battery power supply equipment from being reset due to voltage reduction |
| CN116954114A (en) * | 2023-06-25 | 2023-10-27 | 江苏宿芯半导体有限公司 | MCU controller with LCD drive |
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