CN207638943U - A kind of touch light modulation constant-current circuit for OLED illuminations - Google Patents
A kind of touch light modulation constant-current circuit for OLED illuminations Download PDFInfo
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- CN207638943U CN207638943U CN201721768443.0U CN201721768443U CN207638943U CN 207638943 U CN207638943 U CN 207638943U CN 201721768443 U CN201721768443 U CN 201721768443U CN 207638943 U CN207638943 U CN 207638943U
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- control unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Electroluminescent Light Sources (AREA)
Abstract
A kind of touch light modulation constant-current circuit for OLED illuminations, it is characterised in that：Including voltage regulation unit, touch and MCU control unit, voltage increase and current constant unit, current-voltage sampling unit；Voltage regulation unit is used for the voltage touched and MCU control unit offer is stable；It touches and MCU control unit is used to control the size for exporting stabling current in voltage increase and current constant unit；Voltage increase and current constant unit exports constant current and powers for OLED lamps；Current-voltage sampling unit can protect circuit without damage as reponse system.
Description
Technical field
The utility model is related to a kind of touch light modulation constant-current circuits for OLED illuminations.
Background technology
Existing OLED lamps use generally, but OLED is due to organic material, device architecture, electrode material, process conditions, driving
Pattern etc. causes the stability of OLED to also need to further effort.
Utility model content
To overcome the above technological deficiency, the utility model to provide a kind of touch light modulation Constant Electric Current for OLED illuminations
Road, including voltage regulation unit, touch and MCU control unit, voltage increase and current constant unit, current-voltage sampling unit.
Voltage regulation unit：The input terminal of voltage regulation unit is connected with power supply, and the output end access of voltage regulation unit touches and MCU controls
The input terminal of unit, for the voltage touched and MCU control unit offer is stable.
Touch and MCU control unit：The input terminal of touch and MCU control unit output end access voltage increase and current constant unit, is used
In the size for controlling output stabling current in voltage increase and current constant unit.
Voltage increase and current constant unit：It is touched and MCU control unit control, output constant current is powered for OLED lamps.
Current-voltage sampling unit：The output end of the input terminal access voltage increase and current constant unit of current-voltage sampling unit, electricity
The output end access for flowing voltage sampling unit touches and MCU control unit, for acquiring voltage increase and current constant unit output current size
Signal, while the signal being exported to touch and MCU control unit, size of current signal and is set with touch and MCU control unit
The size of constant current compares, if more than the size of setting electric current, touches and MCU control unit controls and interrupts voltage increase and current constant unit
Output current, it is thus possible to protect circuit without damage.
Wherein, the voltage regulation unit includes resistance R5, and the input terminal of resistance R5 accesses supply voltage, and output end accesses voltage stabilizing
It is grounded after pipe ZD1, filter capacitor C2 is connected in parallel with voltage-stabiliser tube ZD1, and the output of resistance R5 also draws one end as entire
The output end access of the output end of voltage regulation unit, voltage regulation unit touches and MCU control unit, is carried for touch and MCU control unit
For stable voltage.
Wherein, it touches and MCU control unit includes working as microcontroller U2, the 1st foot of microcontroller U2 connects the output of voltage regulation unit
The 5th foot of chip U3 is touched in end, the 2nd foot contact of microcontroller U2, and the 3rd foot of microcontroller U2 connects the 1st foot of microcontroller U2, touches sense
It answers area to connect with resistance R6 and is followed by capacitance C4, and access touches the 3rd feet of chip U3, touch the 2nd foot ground connection of chip U3.
The beneficial effects of the utility model:Mainly there is the following：1, the power supply of chip U3 is touched by MCU (U2) wherein one
A I/O mouthfuls of offer, when power supply reaches stable state not yet when can avoid just powering on, the initialization mistake for touching chip causes to produce
The touch function of product fails or abnormal failure.
2, the boosting mode that the only period control constant current functions of PWM are controlled by MCU belongs to only periodic feedback PWM control modes,
Constant Electric Current flow valuve is set by software programming as required.This control mode can be very good the stable electric current of output, make OLED
Lamp piece does not have stroboscopic, slows down the fatigue of eyes.
3, the utility model is provided with open loop protection circuit, and open loop protection circuit includes the Schottky diode of rectification, filter
Wave capacitance, field-effect tube all have certain pressure voltage, and it is more than above-mentioned device to avoid voltage caused by booster circuit when output open circuit
Part pressure resistance and design, it is ensured that booster circuit is stopped in time when open circuit, and effective protection device does not damage.
4 the utility model short-circuit protection circuits：When exporting terminal shortcircuit, when electric current passes through sampling resistor, resistance drop electricity
Pressure feeds back to MCU, and when reaching setting protection value, MCU closes booster circuit and simultaneously closes off the MOSFET (F2) for being series at output end,
Ensure that device is without damage.
Description of the drawings
Fig. 1 is the utility model functional block diagram.
Fig. 2 is the utility model circuit diagram.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
See Fig. 1-2, a kind of touch light modulation constant-current circuit for OLED illuminations, including voltage regulation unit 1, touch and MCU
Control unit 2, voltage increase and current constant unit 3, current-voltage sampling unit 6.
Voltage regulation unit：The input terminal of voltage regulation unit 1 is connected with power supply 5, and the output end access of voltage regulation unit 1 touches and MCU
The input terminal of control unit 2, for providing stable voltage to touch and MCU control unit 2.
Touch and MCU control unit 2：The input terminal of touch and 2 output end of MCU control unit access voltage increase and current constant unit 3,
For controlling the size for exporting stabling current in voltage increase and current constant unit 3.
Voltage increase and current constant unit 3：It is touched and MCU control unit control, output constant current is powered for OLED lamps piece 4.
Current-voltage sampling unit 6：The output end of the input terminal access voltage increase and current constant unit 3 of current-voltage sampling unit 6,
The output end access of current-voltage sampling unit 6 touches and MCU control unit 2, for acquiring 3 output current of voltage increase and current constant unit
High low signal, while the signal being exported to touch and MCU control unit 2, size of current signal and touch and MCU control unit
The size comparison of setting electric current in 2, if being more than the size of setting electric current, it is permanent that touch and MCU control unit 2 control interruption boosting
3 output current of unit is flowed, it is thus possible to protect circuit without damage.
Voltage regulation unit 1 includes resistance R5, and the input terminal of resistance R5 accesses supply voltage, after output end accesses voltage-stabiliser tube ZD1
Ground connection, filter capacitor C2 are connected in parallel with voltage-stabiliser tube ZD1, and the output of resistance R5 also draws one end as entire voltage regulation unit
Output end, voltage regulation unit output end access touch and MCU control unit, for touch and MCU control unit provide it is stable
Voltage.
It touches and MCU control unit 2 includes working as microcontroller U2, the 1st foot of microcontroller U2 connects the output end of voltage regulation unit, single
The 5th foot of chip U3 is touched in the 2nd foot contact of piece machine U2, and the 3rd foot of microcontroller U2 connects the 1st foot of microcontroller U2, touch-sensitive area
It connects with resistance R6 and is followed by capacitance C4, and access touches the 3rd feet of chip U3, touch the 2nd foot ground connection of chip U3.
When human body approaches or touches the induction zone CN3 of U3, the first feet of U3 can export a high or low level signal to
The third foot (input terminal) of U2, the output services pattern of U2 unlatchings at this time, when voltage, current feedback signal meet setting value, U2
The 6th foot export high level, keep F1 open-minded.The 4th feet of U2 start output pwm signal simultaneously, and pwm signal is connected to the grid of F1
(boosting field-effect tube) makes F1 and inductance L1, diode D1, filter capacitor C3 composition booster circuits start to work.After boosting
Electric current makes lamp piece light by being connected to after the OLED lamps piece 4 of output end after F2 is flowed through using resistance R2 by earth-return.
At the same time, the 7th foot of voltage sampling circuit (forming bleeder circuit by R10, R11) Voltage Feedback to U2 is compared judgement,
When electric current is by using resistance R2, R2 high-end generation certain voltage again by I/O protective resistance R7, filter the filtered electrical of clutter
Hold the 5th feet of C8 to U2 and carries out electric current comparison.U2 will be according to the corresponding PWM width of setting output current value.When sample circuit is fed back
Abnormal signal when, U2 will immediately shut off output, makes the wholly off work of F1, F2, completes protection process.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (3)
1. a kind of touch light modulation constant-current circuit for OLED illuminations, it is characterised in that：Including voltage regulation unit, touch and MCU
Control unit, voltage increase and current constant unit, current-voltage sampling unit：
Voltage regulation unit：The input terminal of voltage regulation unit is connected with power supply, and the output end access of voltage regulation unit touches and MCU control unit
Input terminal, for touching and MCU control unit provides stable voltage；
Touch and MCU control unit：The input terminal of touch and MCU control unit output end access voltage increase and current constant unit, for controlling
The size of stabling current is exported in voltage increase and current constant unit processed；
Voltage increase and current constant unit：It is touched and MCU control unit control, output constant current is powered for OLED lamps；
Current-voltage sampling unit：The output end of the input terminal access voltage increase and current constant unit of current-voltage sampling unit, electric current electricity
Output end access touch and the MCU control unit for pressing sampling unit, for acquiring voltage increase and current constant unit output current high low signal,
The signal is exported to touch and MCU control unit, size of current signal and setting electric current in touch and MCU control unit simultaneously
Size comparison, if more than setting electric current size, touch and MCU control unit control interrupt voltage increase and current constant unit output electricity
Stream, so as to protect circuit without damage.
2. a kind of touch light modulation constant-current circuit for OLED illuminations according to claim 1, it is characterised in that：It is described steady
Pressure unit includes resistance R5, and the input terminal of resistance R5 accesses supply voltage, is grounded after output end access voltage-stabiliser tube ZD1, filtered electrical
Hold C2 and voltage-stabiliser tube ZD1 to be connected in parallel, the output of resistance R5 also draws output end of the one end as entire voltage regulation unit, surely
Output end access touch and the MCU control unit for pressing unit, stable voltage is provided for touch and MCU control unit.
3. a kind of touch light modulation constant-current circuit for OLED illuminations according to claim 1, it is characterised in that：Touch and
MCU control unit includes microcontroller U2, and the 1st foot of microcontroller U2 connects the output end of voltage regulation unit, the 2nd foot contact of microcontroller U2
The 5th foot of chip U3 is touched, the 3rd foot of microcontroller U2 connects the 1st foot of microcontroller U2, and touch-sensitive area connects with resistance R6 and is followed by electricity
Hold C4, and access touches the 3rd feet of chip U3, touches the 2nd foot ground connection of chip U3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721768443.0U CN207638943U (en) | 2017-12-18 | 2017-12-18 | A kind of touch light modulation constant-current circuit for OLED illuminations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721768443.0U CN207638943U (en) | 2017-12-18 | 2017-12-18 | A kind of touch light modulation constant-current circuit for OLED illuminations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207638943U true CN207638943U (en) | 2018-07-20 |
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ID=62863438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721768443.0U Expired - Fee Related CN207638943U (en) | 2017-12-18 | 2017-12-18 | A kind of touch light modulation constant-current circuit for OLED illuminations |
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| Country | Link |
|---|---|
| CN (1) | CN207638943U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111542156A (en) * | 2020-05-13 | 2020-08-14 | 马少峰 | Dimmable LED constant current source driving circuit |
-
2017
- 2017-12-18 CN CN201721768443.0U patent/CN207638943U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111542156A (en) * | 2020-05-13 | 2020-08-14 | 马少峰 | Dimmable LED constant current source driving circuit |
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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: 20180720 Termination date: 20211218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |