CN104010423A - LED linear stepless dimming circuit - Google Patents
LED linear stepless dimming circuit Download PDFInfo
- Publication number
- CN104010423A CN104010423A CN201410265827.5A CN201410265827A CN104010423A CN 104010423 A CN104010423 A CN 104010423A CN 201410265827 A CN201410265827 A CN 201410265827A CN 104010423 A CN104010423 A CN 104010423A
- Authority
- CN
- China
- Prior art keywords
- led
- resistance
- circuit
- voltage
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses an LED linear stepless dimming circuit which comprises a constant-voltage direct-current power source. The constant-voltage direct-current power source is connected with a first resistor through a line. The first resistor is respectively connected with a second resistor and the positive electrode of an LED through lines, the second resistor is connected with a slide rheostat through a line, the negative electrode of the LED is connected with a collector of an audion through a line, a base of the audion is connected with a third resistor through a line, the third resistor is connected with the slide rheostat through a line, an emitter of the audion is connected with the slide rheostat in series and then is connected with the constant-voltage direct-current power source through a line, and at least one LED is installed between the first resistor and the collector of the audion. The LED linear stepless dimming circuit is even in dimming process, free of strobing and electromagnetic interference, efficient and low in production cost.
Description
Technical field
The present invention relates to a kind of light adjusting circuit, relate in particular to the linear non-pole light regulating circuit of a kind of LED.
Background technology
LED light regulating technology is mainly frequency or the ON time by control switch pipe now, realizes the controlled of LED lamp watt level, completes lamp brightness 0-100% luminous flux and controls.But adopt, be generally to realize by chip or single-chip microcomputer in this way, cost compare is high, also has complex circuit, has the shortcomings such as EMI electromagnetic interference.
Summary of the invention
The object of the present invention is to provide the linear non-pole light regulating circuit of a kind of LED, its simplicity of design, light modulation process is even, without stroboscopic, without electromagnetic interference, efficient and production cost is low.
In order to achieve the above object, technical scheme of the present invention is:
The linear non-pole light regulating circuit of a kind of LED, comprise constant-voltage DC source DC, described constant-voltage DC source DC is connected with the first resistance R 1 circuit, and described the first resistance R 1 is connected with the anodal circuit of the second resistance R 2, LED respectively, and wherein said the second resistance R 2 is connected with slide rheostat R4 circuit; The negative pole of described LED is connected with triode Q1 collector electrode circuit, described triode Q1 base stage is connected with the 3rd resistance R 3 circuits, described the 3rd resistance R 3 is connected with slide rheostat R4 circuit, and described triode Q1 emitting stage is connected with constant-voltage DC source DC circuit with after slide rheostat R4 series connection; Between described the first resistance R 1 and triode Q1 collector electrode, 1 LED is at least installed.
Described triode Q1 is replaced by field effect transistor FET.
Between described the first resistance R 1 and triode Q1 collector electrode, 4 LED are installed.
Between described the first resistance R 1 and triode Q1 collector electrode, 8 LED are installed.
Between described the first resistance R 1 and triode Q1 collector electrode, 12 LED are installed.
The invention has the beneficial effects as follows: the linear non-pole light regulating circuit of a kind of LED, its simplicity of design, light modulation process is even, without stroboscopic, without electromagnetic interference, efficient and production cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of the embodiment of the present invention 2.
Embodiment
Embodiment 1
The linear non-pole light regulating circuit of a kind of LED as shown in Figure 1, comprise constant-voltage DC source DC, described constant-voltage DC source DC is connected with the first resistance R 1 circuit, described the first resistance R 1 is connected with the anodal circuit of the second resistance R 2, LED respectively, and wherein said the second resistance R 2 is connected with slide rheostat R4 circuit; The negative pole of described LED is connected with triode Q1 collector electrode circuit, described triode Q1 base stage is connected with the 3rd resistance R 3 circuits, described the 3rd resistance R 3 is connected with slide rheostat R4 circuit, and described triode Q1 emitting stage is connected with constant-voltage DC source DC circuit with after slide rheostat R4 series connection.
Described input constant-voltage DC source DC comprises the constant voltage wiring board that the finished product power supply buied on market or producer control oneself and produce.When input constant-voltage DC source DC is 12V, between described the first resistance R 1 and triode Q1 collector electrode, 4 LED are a string lamp pearl, according to actual power size, multi-channel parallel.Total voltage after LED series connection approaches with the voltage of input constant-voltage DC source DC.Total voltage after conventional LED series connection is a little less than the voltage of input constant-voltage DC source DC.When input constant-voltage DC source DC is 24V, it is a string lamp pearl that 8 LED are installed between described the first resistance R 1 and triode Q1 collector electrode, according to actual power size, multi-channel parallel.Total voltage after LED series connection approaches with the voltage of input constant-voltage DC source DC.
Input constant-voltage DC source DC described in the present embodiment is 24V, and 8 LED have therefore been installed in series between the first resistance R 1 and triode Q1 collector electrode.While moving on to top on slide rheostat R4, the resistance of slide rheostat R4 is 0.The resistance sum of the resistance of the second resistance R 2 and slide rheostat R4 is minimum, and maximum by the electric current of triode Q1, the brightness of LED lamp pearl is 100%.When slide rheostat R4 moves down into bottom, the resistance of slide rheostat R4 is maximum.The resistance sum of the resistance of the second resistance R 2 and slide rheostat R4 is maximum, and minimum by the electric current of triode Q1, the brightness of LED lamp pearl is 0, thereby reaches the effect of non-pole light regulating.Because the pressure drop of triode Q1 makes to be split in the lower voltage on each LED, the upper voltage of each LED only need reduce several volts at zero point, and the brightness of lamp pearl will drop to 0 from 100%.Therefore triode Q1 only need share very little voltage, just can realize 0-100% non-pole light regulating, so the total efficiency of circuit is very high, triode Q1 caloric value seldom.
The linear non-pole light regulating circuit of a kind of LED of the present embodiment, its simplicity of design, light modulation process is even, without stroboscopic, without electromagnetic interference, efficient and production cost is low.
Embodiment 2
The linear non-pole light regulating circuit of a kind of LED as shown in Figure 2, comprise constant-voltage DC source DC, described constant-voltage DC source DC is connected with the first resistance R 1 circuit, described the first resistance R 1 is connected with the anodal circuit of the second resistance R 2, LED respectively, and wherein said the second resistance R 2 is connected with slide rheostat R4 circuit; The negative pole of described LED is connected with the drain electrode circuit of field effect transistor FET, the grid of described field effect transistor FET is connected with the 3rd resistance R 3 circuits, described the 3rd resistance R 3 is connected with slide rheostat R4 circuit, and the source electrode of described field effect transistor FET is connected with constant-voltage DC source DC circuit with after slide rheostat R4 series connection.
Described input constant-voltage DC source DC comprises the constant voltage wiring board that the finished product power supply buied on market or producer control oneself and produce.When input constant-voltage DC source DC is 12V, 4 LED have been installed in series between described the first resistance R 1 and the drain electrode of field effect transistor FET.Or guarantee that the total voltage after LED series connection approaches with the voltage of input constant-voltage DC source DC.Total voltage after conventional LED series connection is a little less than the voltage of input constant-voltage DC source DC.When input constant-voltage DC source DC is 24V, 8 LED have been installed in series between described the first resistance R 1 and the drain electrode of field effect transistor FET.Or guarantee that the total voltage after LED series connection approaches with the voltage of input constant-voltage DC source DC.
Input constant-voltage DC source DC described in the present embodiment is 24V, and 8 LED have therefore been installed in series between the first resistance R 1 and the drain electrode of field effect transistor FET.While moving on to top on slide rheostat R4, the resistance of slide rheostat R4 is 0.The resistance sum of the resistance of the second resistance R 2 and slide rheostat R4 is minimum, and maximum by the electric current of field effect transistor FET, the brightness of LED lamp pearl is 100%.When slide rheostat R4 moves down into bottom, the resistance of slide rheostat R4 is maximum.The resistance sum of the resistance of the second resistance R 2 and slide rheostat R4 is maximum, and minimum by the electric current of field effect transistor FET, the brightness of LED lamp pearl is 0, thereby reaches the effect of non-pole light regulating.Because the pressure drop of field effect transistor FET makes to be split in the lower voltage on each LED, the upper voltage of each LED only need reduce several volts at zero point, and the brightness of lamp pearl will drop to 0 from 100%.Therefore field effect transistor FET only need share very little voltage, just can realize 0-100% non-pole light regulating, so the total efficiency of circuit is very high, field effect transistor FET caloric value seldom.
The linear non-pole light regulating circuit of a kind of LED of the present embodiment, its simplicity of design, light modulation process is even, without stroboscopic, without electromagnetic interference, efficient and production cost is low.
Claims (5)
1. the linear non-pole light regulating circuit of a LED, it is characterized in that: comprise constant-voltage DC source DC, described constant-voltage DC source DC is connected with the first resistance R 1 circuit, described the first resistance R 1 is connected with the anodal circuit of the second resistance R 2, LED respectively, and wherein said the second resistance R 2 is connected with slide rheostat R4 circuit; The negative pole of described LED is connected with triode Q1 collector electrode circuit, described triode Q1 base stage is connected with the 3rd resistance R 3 circuits, described the 3rd resistance R 3 is connected with slide rheostat R4 circuit, and described triode Q1 emitting stage is connected with constant-voltage DC source DC circuit with after slide rheostat R4 series connection; Between described the first resistance R 1 and triode Q1 collector electrode, 1 LED is at least installed.
2. the linear non-pole light regulating circuit of a kind of LED according to claim 1, is characterized in that: described triode Q1 is replaced by field effect transistor FET.
3. the linear non-pole light regulating circuit of a kind of LED according to claim 1 and 2, is characterized in that: between described the first resistance R 1 and triode Q1 collector electrode, 4 LED are installed.
4. the linear non-pole light regulating circuit of a kind of LED according to claim 1 and 2, is characterized in that: between described the first resistance R 1 and triode Q1 collector electrode, 8 LED are installed.
5. the linear non-pole light regulating circuit of a kind of LED according to claim 1 and 2, is characterized in that: between described the first resistance R 1 and triode Q1 collector electrode, 12 LED are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410265827.5A CN104010423A (en) | 2014-06-16 | 2014-06-16 | LED linear stepless dimming circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410265827.5A CN104010423A (en) | 2014-06-16 | 2014-06-16 | LED linear stepless dimming circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104010423A true CN104010423A (en) | 2014-08-27 |
Family
ID=51370875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410265827.5A Pending CN104010423A (en) | 2014-06-16 | 2014-06-16 | LED linear stepless dimming circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104010423A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104955223A (en) * | 2015-05-29 | 2015-09-30 | 南通医疗器械有限公司 | Digital tube display LED shadowless lamp circuit with double dimming function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201097468Y (en) * | 2007-05-09 | 2008-08-06 | 李广 | LED light source circuit |
| WO2012136030A1 (en) * | 2011-04-02 | 2012-10-11 | 英飞特电子（杭州）有限公司 | Circuit for adjusting led current |
| CN204031520U (en) * | 2014-06-16 | 2014-12-17 | 新昌县博阳照明有限公司 | A kind of LED linear non-pole light regulating circuit |
-
2014
- 2014-06-16 CN CN201410265827.5A patent/CN104010423A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201097468Y (en) * | 2007-05-09 | 2008-08-06 | 李广 | LED light source circuit |
| WO2012136030A1 (en) * | 2011-04-02 | 2012-10-11 | 英飞特电子（杭州）有限公司 | Circuit for adjusting led current |
| CN204031520U (en) * | 2014-06-16 | 2014-12-17 | 新昌县博阳照明有限公司 | A kind of LED linear non-pole light regulating circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104955223A (en) * | 2015-05-29 | 2015-09-30 | 南通医疗器械有限公司 | Digital tube display LED shadowless lamp circuit with double dimming function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20160157318A1 (en) | Current Splitter For Led Lighting System | |
| CN102573213B (en) | LED (Light Emitting Diode) dimming system | |
| CN105025642A (en) | LED adaptive dimming classroom lamp and control method thereof | |
| CN104066247A (en) | Drive circuit and dimming control method for LED lighting device | |
| CN103313469A (en) | Driving circuit and driving method for light-emitting diode (LED) illumination device | |
| CN111972048B (en) | Voltage transformer of lighting system | |
| CN204291476U (en) | LED dimming power source circuit and LED lamp | |
| CN202551459U (en) | LED (Light Emitting Diode) driving power supply module for silicon controlled regulating circuit | |
| CN204031520U (en) | A kind of LED linear non-pole light regulating circuit | |
| CN104010423A (en) | LED linear stepless dimming circuit | |
| CN202634833U (en) | Diming circuit for light-emitting diode (LED) lamp | |
| CN105611672A (en) | Light emitting diode (LED) driving circuit compatible with silicon controlled rectifier dimmer | |
| KR101488682B1 (en) | Dimming control of led lighting circuits | |
| CN203233576U (en) | Drive circuit of LED lighting device | |
| CN102170735A (en) | Dimming circuit of high-power LED (Light-emitting Diode) lamp | |
| CN204616156U (en) | A kind of LED drive circuit being applicable to controllable silicon light modulation | |
| CN105657891A (en) | LED drive power supply circuit | |
| CN104159365A (en) | Backlight circuit and backlight with same | |
| CN109561539A (en) | A kind of digital timing invariable power directly driven by AC LED circuit | |
| CN104582140A (en) | Linear dimming circuit | |
| CN203352865U (en) | LED dimming system | |
| CN203435195U (en) | MR16 silicon-controlled dimming power source adapting to all electronic transformers | |
| CN203136246U (en) | Dimming circuit suitable for linear high-voltage LED driver | |
| CN207505168U (en) | A kind of LED thyristor regulatings optical circuit | |
| CN205213075U (en) | Electrodeless dimmer circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140827 |