CN106354075A - Remote controller control circuit with backlight screen - Google Patents
Remote controller control circuit with backlight screen Download PDFInfo
- Publication number
- CN106354075A CN106354075A CN201611067707.XA CN201611067707A CN106354075A CN 106354075 A CN106354075 A CN 106354075A CN 201611067707 A CN201611067707 A CN 201611067707A CN 106354075 A CN106354075 A CN 106354075A
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- backlight
- power supply
- audion
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- 230000011664 signaling Effects 0.000 claims description 19
- 238000005070 sampling Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Liquid Crystal Display Device Control (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention 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 power supply voltage to supply power to a 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 method is characterized in that: 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 invention provides a remote controller control circuit with a backlight screen, which uses a booster circuit to replace a DC/DC booster power supply chip, solves the problem of automatic reset of a remote controller and has longer service life of a battery.
Description
Technical field
The present invention relates 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, what great majority used is all the back of the body in more than 2.4v for the driving voltage
Light source, such as white backlight；Be required in its control circuit dc/dc booster power chip carry out boosting just enable bright during signaling
Screen function, but dc/dc booster power chip cost is higher, and in use, the phenomenon that automatically resets and battery
Fall short of, the competitiveness in impact product market.
Content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of remote control control with backlight screen
Circuit, it replaces dc/dc booster power chip using the booster circuit of no integrated chip, serves same boosting, and
Solve remote control to automatically reset problem, and battery compare longer.
The purpose of the present invention employs the following technical solutions realization:
A kind of remote control control circuit with backlight screen it is characterised in that: include key circuit, for will be key controlled
Be converted to the signal of telecommunication；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, for sampling and exporting mcu to the output voltage of booster circuit；Backlight switch circuit, for controlling
The lighting and extinguish of backlight processed；Mcu control circuit, to control above circuit for reception or output signal and to drive lcd, with
And mcu power supply circuits, for powering to mcu；Described key circuit, signaling circuit are connected with mcu；Described booster circuit input
End is connected with power supply, and control end is connected with mcu, for receiving the pwm signal of mcu output and then controlling boost voltage value,
Outfan is connected with backlight one end, sample circuit, mcu power supply circuits；Described sample circuit outfan is connected with mcu；
Described backlight switch circuit is connected with the other end of backlight, and control end is connected with mcu, for receiving the pwm of mcu output
Signal is controlling backlight switch circuit turn-on；Described mcu power supply circuits first input end connects power supply, and the second input connects liter
Volt circuit outfan, powers to mcu for booster voltage, and outfan connects mcu.
Preferably, described booster circuit includes the first inductance l1, first resistor r1, the first diode d1, the first audion
Q1, the first electric capacity c1 and the second electric capacity c2, first inductance l1 one end is connected with power supply, the first inductance l1 other end and the one or two pole
The colelctor electrode of the anode of pipe d1 and the first audion q1 connects jointly, the negative electrode of the first diode d1 and first electric capacity c1 one end
Connect, the second electric capacity c2 is connected in parallel on the first electric capacity c1 two ends, and the base stage of the first audion q1 is connected with first resistor r1, the first electricity
The resistance r1 other end is connected with mcu, and the emitter stage of the first audion q1 is connected and is grounded with the first electric capacity c1 other end.
Preferably, described backlight switch circuit includes second resistance r2, the second electric capacity c2, the second diode d2 and the two or three
Pole pipe q2, the anode of the second diode d2 connects mcu, the negative electrode of the second diode d2 and second resistance r2, the second audion q2
Base stage sequential series, second electric capacity c2 one end is connected with second resistance r2 junction with the second diode d2, the other end and
The emitter stage of two audion q2 connects and is grounded, and the colelctor electrode of the second audion q2 is connected with backlight one end.
Preferably, described mcu power supply circuits include the 3rd diode d3, the 3rd audion q3 and 3rd resistor r3；The
The anode of three diode d3 is connect with power supply, and mcu is connected jointly with the negative electrode of the 3rd diode d3 and the emitter stage of the 3rd audion q3
Connect, the base stage of the 3rd audion 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 audion q3 is connected with the outfan of booster circuit.
Preferably, described Acquisition Circuit includes the 5th resistance r5 and the 6th resistance r6 connecting with the 5th resistance r5, the
The five resistance r5 other ends are connected with booster circuit outfan, the 3rd audion q3 in the other end of r6 and backlight switch circuit
It is connected, sample circuit outfan is connected between the 5th resistance r5 and the 6th resistance r6.
Preferably, described mcu is the chip of model auspicious Sa rl78/l12 series.
Compared to existing technology, the beneficial effects of the present invention is: by arrange booster circuit instead of power boost chip
Realize boost function；Make boost output voltage value more stable by arranging sample circuit；By arranging mcu power supply circuits,
During signaling, switching mcu power supply is voltage boosting and stabilizing circuit, it is to avoid signaling is that cell voltage is too low leads to mcu to reset, and so exists
Also can work when cell voltage is relatively low, extend battery life.
Brief description
Fig. 1 is the remote control control circuit structure block diagram that one of embodiment of the present invention has backlight screen；
Fig. 2 is that in Fig. 1, booster circuit, backlight switch circuit, sample circuit, led backlight and mcu power supply circuits are mutual
The circuit theory diagrams connecting；
Fig. 3 is the circuit theory diagrams that 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: 10, key circuit；20th, signaling circuit；30th, mcu control circuit；40th, mcu power supply circuits；50th, rise piezoelectricity
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, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:
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 the signal of telecommunication；Signaling circuit 20, for launching infrared signal；Power boost circuit 50, supply voltage vcc is boosted and exports
Power to led backlight 80, the present invention is preferably led backlight, the backlight that other have said function parameter is also suitable；
Sample circuit 60, for sampling and exporting mcu to the output voltage of booster circuit；Backlight switch circuit 70, for controlling led
The lighting and extinguish of backlight 80；Mcu control circuit 30, to control above circuit for reception or output signal and to drive lcd
90, and mcu power supply circuits 40, for powering to mcu；Described key circuit 10, signaling circuit 20 are connected with mcu；Described
Booster circuit 50 input is connected with power supply, and control end is connected with mcu, for receiving pwm signal and then the control of mcu output
Boost voltage value processed, outfan is connected with led backlight one end, sample circuit, mcu power supply circuits；Described sample circuit is defeated
Go out end to be connected with mcu；Described backlight switch circuit is connected with the other end of led backlight, and control end is connected with mcu,
Pwm signal for receiving mcu output to control backlight switch circuit turn-on；Described mcu power supply circuits first input end connects
Power supply, the second input connects booster circuit outfan, powers to mcu for booster voltage, and outfan connects mcu.
During user's remote control, the button that pushes button in circuit, after mcu obtains respective operations command signal, mcu exports pwm
To the control end of booster circuit and backlight switch circuit, the conducting of backlight switch contactor, backlight is grounded signal, booster circuit
Export after supply voltage is boosted, sample circuit is sampled to booster circuit output voltage, and sampled value is returned mcu, mcu leads to
Cross comparison setting voltage value scope, adjust pwm signal dutyfactor to control boost voltage value further, make booster voltage value stabilization
In a scope, provide stable driving voltage to backlight, light backlight；Booster circuit output voltage also passes through simultaneously
Mcu power supply circuits are powered to mcu.
As Fig. 2, booster circuit include the first inductance l1, first resistor r1, the first diode d1, the first audion q1,
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 end and the first diode d1
Anode and the colelctor electrode of the first audion q1 jointly connect, the negative electrode of the first diode d1 and first electric capacity c1 one end are even
Connect, the second electric capacity c2 is connected in parallel on the first electric capacity c1 two ends, the base stage of the first audion q1 is connected with first resistor r1, first resistor
The r1 other end is connected with mcu, and the emitter stage of the first audion q1 is connected and is grounded with the first electric capacity c1 other end.
Mcu output pwm square-wave signal to control the first audion through the base stage of first resistor r1 to the first audion q1
The ON-OFF of q1, when the first audion q1 conducting ground connection, power supply vcc charges to the first inductance l1, the first inductance l1 storage electricity
Can, when the first audion q1 cut-off, inductance l1 is more than vcc and d1 forward voltage drop sum when, the first inductance l1 passes through the
One diode pair the first electric capacity, 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 mcu and exports the boost function that pwm signal achieves, thus instead of the use power boost core of routine
Piece.
Backlight switch circuit includes second resistance r2, the second electric capacity c2, the second diode d2 and the second audion q2, and second
The anode of diode d2 connects mcu, and the base stage order of the negative electrode of the second diode d2 and second resistance r2, the second audion q2 is gone here and there
Connection, second electric capacity c2 one end is connected with second resistance r2 junction with the second diode d2, the other end and the second audion q2's
Emitter stage connects and is grounded, and the colelctor electrode of the second audion q2 is connected with backlight one end.
Mcu output pwm signal is also transported to backlight switch circuit to booster circuit simultaneously, and pwm signal is through the two or two pole
The base stage of pipe d2, second resistance r2 to the second audion q2 makes the second audion q2 conducting, due to the transmitting of the second audion q2
Pole is grounded, that is, realize the conducting between the colelctor electrode of the second audion q2 and ground.The colelctor electrode of the second audion q2 and led backlight
Lamp one end connects, and the led other end is connected with booster circuit outfan, when the second audion q2 turns on, the collection of the second audion q2
Electrode is grounded, and led backlight voltage of both ends of lamp is more than led driving voltage, and led backlight is lighted, when the second audion q2 ends, the
The colelctor electrode of two audion q2 connects booster circuit outfan, and led backlight voltage of both ends of lamp is less than led driving voltage, led backlight
Do not light.The control that led backlight is lighted in supply voltage boosting simultaneously is reached by the design of backlight switch circuit.
Sample circuit includes the 5th resistance r5 and the 6th resistance r6 connecting with the 5th resistance r5, and the 5th resistance r5 is another
End is connected with booster circuit outfan, and the other end of r6 is connected with the 3rd audion 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 through 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), exports in mcu, is compared with range of set value, such as
More than range of set value, then mcu passes through pid computing, reduces the dutycycle of output pwm signal, such as less than range of set value, then
Mcu passes through pid computing, increases the dutycycle of output pwm signal, until reaching the voltage range of our settings.Adopted by setting
The feedback of sample circuit, booster voltage can obtain Real-time Feedback and adjust, the more stable power supply of booster voltage output.
Mcu power supply circuits include the 3rd diode d3, the 3rd audion q3 and 3rd resistor r3；3rd diode d3's
Anode is connect with power supply, and mcu is connected jointly with the negative electrode of the 3rd diode d3 and the emitter stage of the 3rd audion q3, the 3rd audion
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 audion q3's
Colelctor electrode is connected with the outfan of booster circuit.
When being not required to operational and controlled key button and carrying out signaling, mcu does not export pwm signal, led backlight cut-off state, booster circuit
Do not run, output voltage very little, the 3rd audion q3 cut-off, now mcu supply voltage vdd by power supply vcc through the three or two pole
Pipe is powered；When signaling, mcu exports pwm signal, and q3 turns on, when booster circuit output voltage is more than supply voltage 0.3v
When, mcu running voltage vdd is powered by booster circuit output voltage, when booster circuit output voltage is less than supply voltage 0.3v,
Mcu running voltage is powered by power supply.By arranging mcu power supply circuits so that mcu supply voltage can automatically switch in signaling
Higher power voltage supply pattern, it is to avoid battery voltage instantaneous in signaling reduce, when transient voltage leads to less than mcu supply voltage
The problem that mcu resets.
As Fig. 3, Fig. 4, the button two ends in key circuit are connected with mcu, and by operating button, mcu obtains respective operations
Command signal, starts mcu output pwm signal and exports high level drive signal to signaling circuit, the led in signaling circuit is carried out
The infrared control signal of transmitting certain frequency；Preferably, mcu is the chip of model auspicious Sa rl78/l12 series.
In embodiments of the present invention, have the beneficial effects that: be aided with mcu output pwm control realization by arranging booster circuit
Boosting, instead of the circuit using power boost chip；Setting sample circuit feedback mcu is adjusted pwm on this basis again
Dutycycle, to adjust booster voltage, obtains more stable booster voltage scope；By arranging backlight switch circuit, realize boosting same
When light backlight；By arranging mcu power supply circuits, switching mcu power supply can be made in signaling boosting, it is to avoid battery uses
Long, the mcu supply voltage too low reset phenomenon leading to during signaling.
It will be apparent to those skilled in the art that can technical scheme as described above and design, make other various
Corresponding change and deformation, and all these change and deformation all should belong to the protection domain of the claims in the present invention
Within.
Claims (6)
1. a kind of remote control control circuit with backlight screen is it is characterised in that include: key circuit, for will be key controlled
Be converted to the signal of telecommunication；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, for sampling and exporting mcu to the output voltage of booster circuit；Backlight switch circuit, for controlling
The lighting and extinguish of backlight processed；Mcu control circuit, to control above circuit for reception or output signal and to drive lcd；With
And mcu power supply circuits, for powering to mcu；Described key circuit, signaling circuit are connected with mcu；
Described booster circuit input is connected with power supply；Described booster circuit control end is connected with mcu, for receiving mcu
The pwm signal of output and then control boost voltage value；Described booster circuit outfan and backlight one end, sample circuit input
End, mcu power supply circuits are connected；Described sample circuit outfan is connected with mcu；Described backlight switch circuit and backlight
The other end is connected；Control end is connected with mcu, and the pwm signal for receiving mcu output to control backlight switch circuit to lead
Logical；Described mcu power supply circuits first input end connects power supply；It is defeated that described mcu power supply circuits second input connects booster circuit
Go out end, power to mcu for booster voltage, described mcu power supply circuits outfan connects mcu.
2. a kind of remote control control circuit with backlight screen according to claim 1 is it is characterised in that described liter of piezoelectricity
Road includes the first inductance l1, first resistor r1, the first diode d1, the first audion q1, the first electric capacity c1 and the second electric capacity c2,
First inductance l1 one end is connected with power supply, the anode of the first inductance l1 other end and the first diode d1 and the first audion q1
Colelctor electrode jointly connect, 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 audion q1 is connected with first resistor r1, and the first resistor r1 other end is connected with mcu, and first
The emitter stage of audion q1 is connected and is grounded with the first electric capacity c1 other end.
3. a kind of remote control control circuit with backlight screen according to claim 2 is it is characterised in that described backlight is opened
Close circuit and include second resistance r2, the second electric capacity c2, the second diode d2 and the second audion q2, the anode of the second diode d2
Connect mcu, the negative electrode of the second diode d2 and second resistance r2, the base stage sequential series of the second audion q2, the second electric capacity c2
One end is connected with second resistance r2 junction with the second diode d2, and the other end is connected and connects with the emitter stage of the second audion q2
Ground, the colelctor electrode of the second audion q2 is connected with backlight one end.
4. a kind of remote control control circuit with backlight screen according to claim 3 is it is characterised in that described mcu supplies
Circuit includes the 3rd diode d3, the 3rd audion q3 and 3rd resistor r3；The anode of the 3rd diode d3 is connect with power supply,
Mcu is connected jointly with the negative electrode of the 3rd diode d3 and the emitter stage of the 3rd audion q3, the base stage of the 3rd audion q3 and the
Three resistance r3 connect, and the other end of 3rd resistor r3 is connected with the backlight other end, the colelctor electrode of the 3rd audion q3 and boosting
The outfan of circuit connects.
5. a kind of remote control control circuit with backlight screen according to claim 3 is it is characterised in that described collection is electric
Road includes the 5th resistance r5 and the 6th resistance r6 connecting with the 5th resistance r5, and the 5th resistance r5 other end is defeated with booster circuit
Go out end to be connected, the other end of r6 is connected with the 3rd audion q3 in backlight switch circuit, sample circuit outfan connects
Between the 5th resistance r5 and the 6th resistance r6.
6. a kind of remote control control circuit with backlight screen according to one of claim 1-5 is it is characterised in that described
Mcu is the chip of model auspicious Sa rl78/l12 series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611067707.XA CN106354075B (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 |
|---|---|---|---|
| CN201611067707.XA CN106354075B (en) | 2016-11-25 | 2016-11-25 | Remote controller control circuit with backlight screen |
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| Publication Number | Publication Date |
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| CN106354075A true CN106354075A (en) | 2017-01-25 |
| CN106354075B CN106354075B (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611067707.XA Active CN106354075B (en) | 2016-11-25 | 2016-11-25 | Remote controller control circuit with backlight screen |
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Cited By (4)
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| 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 |
| CN111081002A (en) * | 2020-01-16 | 2020-04-28 | 惠州高盛达智联科技有限公司 | A remote control circuit |
| CN111599154A (en) * | 2020-06-02 | 2020-08-28 | 海信视像科技股份有限公司 | Remote controller |
| 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 |
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