CN205830088U - A kind of light adjusting circuit - Google Patents
A kind of light adjusting circuit Download PDFInfo
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- CN205830088U CN205830088U CN201620580029.6U CN201620580029U CN205830088U CN 205830088 U CN205830088 U CN 205830088U CN 201620580029 U CN201620580029 U CN 201620580029U CN 205830088 U CN205830088 U CN 205830088U
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Abstract
The utility model discloses a kind of light adjusting circuit, including rectification circuit, LED string, current detection module, judge module, handover module, driving module, sample circuit, at least one power tube and supply module, the input of power tube connects the negative pole of external LED string, and the outfan of power tube connects current detection module and sample circuit.This utility model is by detecting the persistent period that power tube source electrode has no current to flow through, thus avoids the electric capacity impact on switch detection accuracy in circuit.Avoid the discharge time caused because of applications component variations inconsistent thus cause switch on and off to judge problem by accident.Chip internal clock timer controls Preset Time, and light modulation concordance is high, it is to avoid the switch interference erroneous judgement to detection, it is ensured that switch dimming method can use at large area region.
Description
Technical field
This utility model relates to LED illumination and controls technical field, particularly relates to a kind of LED switch light adjusting circuit.
Background technology
LED light adjusting circuit in the market has various ways, mainly includes that controllable silicon light modulation, PWM light modulation and switch are adjusted
Light etc..Major part switch dimming be all by detection on and off switch on-off action dim, this working method based on
Relatively, its operation principle is threshold ratio: use at power positive end connection resistance and electric capacity to ground, the change of voltage on sampling capacitance,
It is judged as that when the voltage on electric capacity is higher than first threshold switch cuts out, when the voltage on electric capacity is less than Second Threshold for switch
Open, it is judged that the on-off action of on and off switch, and on-off action is counted, after power supply power-fail, maintain counting knot
Really, control to flow through the size of current of LED according to the corresponding reference voltage of power-off number of times output one, thus realize light modulation.This tune
There are the following problems for light method:
On the one hand affected very big by capacitance parameter because of the fall time of capacitance voltage, the actual capacity of such as electric capacity, electric capacity
Leakage current, the temperature characterisitic of electric capacity, these parameters of different manufacturers electric capacity cannot be unified, even if the electricity of same producer
Holding, these parameters there is also deviation, thus has a strong impact on the accuracy of switch detection；On the other hand, open at high-speed switch power supply
Guan Shihui causes light modulation detection inaccurate, and missing inspection is surveyed or detects switch motion less, and its result is exactly at a multiple lamp of on-off control
Time, high-speed switch power supply, between lamp and lamp, there is inconsistent phenomenon in dimming state, causes the switch dimming cannot be in supermarket, market etc.
Commercial large area region uses.
It would therefore be highly desirable to fundamentally solve the problem that switch dimming exists.
Summary of the invention
For solving problems of the prior art, the utility model proposes a kind of light adjusting circuit, including rectification circuit,
LED string, current detection module, judge module, handover module, driving module, sample circuit, at least one power tube and power supply
Module；
The input of at least one power tube described connects the negative pole of external LED string；
The outfan of at least one power tube described connects current detection module and sample circuit；
Described current detection module is operatively coupled with described judge module and is connected；
Described judge module is operatively coupled with described handover module and is connected；
Described handover module is operatively coupled with described driving module and is connected；
Described driving module connects the control end of described power tube；
Described current detection module is used for detecting whether described power tube has electric current to flow through, and output detections signal；
Described judge module determines the break-make persistent period of electric current on described power tube according to described detection signal and exports
Judge signal；
Described handover module controls described driving module output different driving signal according to described judgement signal；
Described power tube is according to described driving signal switched conductive state.
Preferably, described current detection module includes at least one comparator circuit, when there being electric current to flow through power tube, than
Relatively device is output as height, and when not having electric current to flow through power tube, comparator is output as low, and the signal of described current detection module output is
Detection signal.
Preferably, the output voltage that input is power tube of described comparator and reference voltage, different power tubes is respectively
Connecting different comparator circuits, the reference voltage of different comparator inputs is identical, or different.
Preferably, described judge module includes logic judging circuit, triggers circuit；Described logic judging circuit and described electricity
In stream detection module, the outfan of comparator is connected, and described logic judging circuit is for exporting according to described current detection module
Detection signal judges the current signal break-make persistent period on described power tube, presets bar when the current signal break-make persistent period meets
During part, logic judging circuit output judges that signal touches sends signals to handover module to triggering circuit, the output of described triggering circuit.
Preferably, described pre-conditioned include: the current signal on-time continues more than first threshold and disconnecting
Time is less than the 3rd threshold value more than Second Threshold, or break time is more than the 3rd threshold value.
Preferably, described handover module includes state storage circuitry and gate control circuit, and described storage circuit connects institute
State gate control circuit；Described storage circuit includes enumerator, for effective on off state of storage switch and to effectively switch
State counts；Described gate control circuit exports gate control signal, different described numerical value according to the numerical value of described enumerator
Corresponding different described gate control signal, the corresponding different gating of different described gate control signal controls voltage.
Preferably, described driving module includes at least one double-width grinding comparison circuit, described double-width grinding comparison circuit
Input connect the output voltage of power tube, another input connects the described choosing of described gate control circuit output
Logical control voltage (Vp), the outfan of described double-width grinding comparison circuit connects the control end of described power tube, different both-ends
The outfan of input comparison circuit connects different power tubes and controls end.
Preferably, also including that excess temperature compensates circuit, described excess temperature compensates circuit and is connected with described handover module, works as chip
When temperature exceedes design temperature, described excess temperature compensates circuit output excess temperature control signal, and described handover module is according to described excess temperature
Control signal controls the output voltage of described driving module, thus controls the size of current of described power tube outfan.
Preferably, described sample circuit includes sampling resistor, and described sampling resistor one end connects the output of described power tube
End and described current detection module, the other end connects the negative pole of external rectification circuit.
This utility model also proposes a kind of LED illumination circuit, and including aforesaid light adjusting circuit, described LED illumination circuit is also
Including on and off switch, described on and off switch connects rectification circuit, and for control circuit break-make, the positive pole of described rectification circuit connects
The positive pole of LED string, the supply module of described light adjusting circuit, the negative pole of described rectification circuit connects the sampling electricity of light adjusting circuit
Road.
This utility model is compared with the prior art and provides the benefit that:
(1) this electric circuit inspection switch on and off is to be realized by detection power tube source current situation of change, can effectively keep away
Exempt from the impact of electric capacity in traditional switch monitoring method.
(2) this utility model is by the " closed " of this kind of method detection switch, "off", RESET action, it is to avoid because of
The discharge time that applications component variations causes is inconsistent thus causes switch on and off to judge problem by accident.
(3) this utility model Preset Time condition is controlled by circuit Internal clock timer, by peripheral components parameter shadow
Ringing less, light modulation concordance is high.
(4) this utility model height current duration and rationally arranging of no current persistent period can avoid switch interference
Erroneous judgement to detection.
(5) when this utility model can avoid the commercial large area region such as market, supermarket to use, the lamp that switch dimming causes
With there is inconsistent phenomenon in dimming state between lamp.
Accompanying drawing explanation
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is the single channel light adjusting circuit structural representation according to this utility model embodiment；
Fig. 2 is the Double-way light regulating electrical block diagram according to this utility model embodiment；
Fig. 3 is the current detection module structural representation according to this utility model embodiment；
Fig. 4 is the judge module structural representation according to this utility model embodiment；
Fig. 5 is the handover module structural representation according to this utility model embodiment；
Fig. 6 is the driving modular structure schematic diagram according to this utility model embodiment；
Fig. 7 is the supply module structural representation according to this utility model embodiment；
Fig. 8 is the switch motion sequential chart according to this utility model embodiment；
Fig. 9 is the switch motion sequential chart according to this utility model embodiment；
Figure 10 is the switch motion sequential chart according to this utility model embodiment；
Figure 11 is the control flow chart according to this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model is expanded on further.Should be understood that these embodiments are merely to illustrate this practicality new
Type rather than limit scope of the present utility model.In addition, it is to be understood that after having read the content that this utility model is lectured, this
This utility model can be made various changes or modifications by skilled person, and these equivalent form of values fall within the appended power of the application equally
Profit claim limited range.
As shown in Figure of description 1, wherein comprising a LED string, light adjusting circuit includes current detection module 10, judges
Module 20, handover module 30, driving module 40, sample circuit 60, LED string, power tube 70, supply module 80；At least one
The input of power tube connects the negative pole of described LED string；The outfan of power tube 70 connects current detection module 10 and sampling
Circuit 60；Current detection module 10 is operatively coupled with described judge module 20 and is connected；Judge module 20 and handover module 30
It is operatively coupled connection；Handover module 30 is operatively coupled with driving module 40 and is connected；Module 40 is driven to connect at least one
The control end of individual power tube；Current detection module 10 is used for detecting whether power tube has electric current to flow through；Judge module 20 is according to merit
On rate pipe, the break-make persistent period output of electric current judges signal；Handover module 30 is according to judging that signal controls to drive module 40 to export
Different driving signal；Power tube 70 is according to described driving signal switched conductive state.Supply module 80 provides power supply, electricity for circuit
The output voltage Vi1 and reference voltage V1 that input is power tube 70 of comparator in stream detection module 10.Sample circuit 60 includes
Sampling resistor R2, sampling resistor one end connects outfan and the current detection module 10 of power tube 70, and the other end connects rectified current
The negative pole on road.
As shown in Figure of description 2, wherein comprising two LED strings, light adjusting circuit includes current detection module 10, judges
Module 20, handover module 30, driving module 40, sample circuit 60, LED string, power tube 701,702, supply module 80；At least
The input of one power tube connects the negative pole of described LED string；Power tube 701, the outfan of 702 connects current detection module
10 and sample circuit 60；Current detection module 10 is operatively coupled with described judge module 20 and is connected；Judge module 20 with cut
Die change block 30 is operatively coupled connection；Handover module 30 is operatively coupled with driving module 40 and is connected；Drive module 40 even
Connect the control end of at least one power tube；Current detection module 10 is used for detecting whether power tube has electric current to flow through；Judge module
20 judge signal according to the make-and-break time output of electric current on power tube；Handover module 30 is according to judging that signal controls to drive module 40
Output different driving signal；Power tube 701,702 according to described driving signal switched conductive state.Supply module 80 carries for circuit
Power supply source, the output voltage Vi1 and reference voltage V1 that input is power tube 701 of the first comparator in current detection module 10,
The output voltage Vi2 and reference voltage V2 that input is power tube 702 of the second comparator, reference voltage V1, V2 can be equal, also
Can be unequal, Fig. 2 is not drawn into the first comparator and the second comparator.Sample circuit 60 includes sampling resistor R21, R22, adopts
Sample resistance R21 connects outfan and the current detection module 10 of power tube 701, and the other end connects the negative pole of rectification circuit；Sampling
Resistance R22 connects outfan and the current detection module 10 of power tube 702, and the other end connects the negative pole of rectification circuit.
In addition to Fig. 1, single channel illustrated in fig. 2 and two-way LED string, drive circuit can also drive multiple lamp string, only needs
To set up current monitoring module accordingly, drive the dual input number of comparators at module and increase sampling module 60 accordingly
In sampling resistor quantity.
When contactor Guan Bi conducting, current detection module 10 exports high level, and when contactor is opened, electric current is examined
Survey module 10 output low level, so current detection module 10 module is output as low and high level.
The signal that judge module 20 exports according to current detection module 10 judges current state, in order to prevent manually opened and
Condition adjudgement is caused erroneous judgement by the interference burr signal that shutoff switch causes, it is judged that switch Guan Bi ton is beaten by module 20 with switching
Opening toff and all do delay process, ton ＞ 1mS is effective status, and toff ＞ 50mS is effective status.One effective ton and
After toff, it is judged that trigger one square-wave signal of output of module 20 module；Handover module 30 is according to the output of judge module 20
Signal carries out counting a corresponding state, and each state controls described gate control circuit correspondence one Vp value of output；
Module 40 is driven to control output electric current Io=Vp/R2 or Io1=Vp1/R21, Io2 according to the different Vp values that handover module 30 exports
=Vp2/R22.
As it is shown on figure 3, current detection module 10 includes at least one comparator circuit, the input of comparator circuit is power
The output voltage Vi1 and reference voltage V1 of pipe, the input of different comparator circuits is different, when there being electric current to flow through power tube, than
Relatively device is output as height, and when not having electric current to flow through power tube, comparator is output as low, along with the curent change flow through in power tube,
The low and high level of the outfan exporting change of current detection module 10.
As shown in Figure 4, it is judged that module 20 includes logic judging circuit, triggers circuit；Described logic judging circuit is with described
In current detection module 10, the outfan of comparator is connected, and described logic judging circuit is used for judging described current detection module 10
The current signal break-make persistent period be given, when the current signal break-make persistent period meets pre-conditioned, logic judging circuit is defeated
Going out to judge that signal arrives triggering circuit, the output of described triggering circuit is touched and is sent signals to handover module 30.
Logic judging circuit is to comprise internal timer, is affected less by peripheral components parameter.Triggering circuit takes SR to touch
Sending out device, the most without loss of generality, the trigger of other logics such as set-reset flip-floop, d type flip flop etc. also can realize triggering electricity herein
Road function.
Described pre-conditioned include: the current signal persistent period more than first threshold Ton and turn-off time more than second
Threshold value Toff and less than the 3rd threshold value Tclear, or turn-off time is more than the 3rd threshold value Tclear.Certainly, this patent is given
It is a preferred condition, however not excluded that technical staff selects suitably other pre-conditioned controls with realization to circuit.
As it is shown in figure 5, handover module 30 includes that state storage circuitry and gate control circuit, storage circuit connect described choosing
Logical control circuit；Described storage circuit includes enumerator, for effective on off state of storage switch and to effective on off state
Numeration；Described gate control circuit exports gate control signal according to the value of enumerator, and different gate control signal correspondences is not
Same gating controls voltage, and gating controls voltage and is input to drive an input of double-width grinding comparator in module 40.
As shown in Figure 6, described driving module 40 includes at least one double-width grinding comparison circuit, and described double-width grinding compares
One input of circuit connects the output voltage Vi1 of power tube 70, and it is defeated that another input connects described gate control circuit
The control voltage Vp gone out, the outfan of described double-width grinding comparison circuit connects the control end of power tube.Drive module 40 permissible
Comparative result according to Vp Yu Vi1 realizes circuit control, in requisition for multiple double-width grinding comparison circuits during multiple power tube.
As it is shown in fig. 7, power supply circuits module 80 provides power supply Vdd and Vpp for circuit, wherein Vdd and Vpp is respectively numeral
Power supply and analog power, provide electric energy to each module in circuit.
Additionally, also include in circuit that excess temperature compensates circuit, described excess temperature compensates circuit and is connected with described handover module, when
When chip temperature exceedes design temperature, described excess temperature compensates circuit output excess temperature control signal, and described handover module is according to described
Excess temperature control signal controls the output voltage of described driving module, thus controls the size of current of power tube outfan.
As seen in figs. 8-10, the method for this electric circuit inspection switch on and off persistent period is by detection power tube source current
Situation of change realizes.When switch Guan Bi, current sample point electric current (voltage) duration T 1 reaches or surpasses pre-conditioned
(Ton) judge effectively, system mode read switch " closed " action；When the switches are opened, the LED lamp bead that power tube drain electrode connects
On there is no electric current, now through power tube source electrode flow through resistance to ground electric current be also zero, current sample module gathers this signal also
Judge that this signal is the most effective, when current sample point electric current (voltage) is that zero duration T 2 reaches or surpasses pre-conditioned
(Toff) judge time that effectively system mode read switch "off" action, when break time T2 reaches or surpasses default bar
During part (Tclear), system reset is processed.
" closed " "off" RESET action by this kind of method detection switch, it is to avoid because of applications component variations
The discharge time caused is inconsistent thus causes switch on and off to judge problem by accident, and pre-conditioned Toff, Ton, Tclear pass through chip
Internal clock timer controls, and is affected less by peripheral components parameter, and light modulation concordance is high, and rationally arranging of Toff and Tonl can
To avoid the switch interference erroneous judgement to detection.
Light adjusting circuit controls as follows, the rectified filtering of alternating current power supply, and on and off switch is arranged on current rectifying front-end, when
Effective Guan Bi is with when opening one time within the setting time on and off switch, and the display state of LED changes, control method such as Figure 11 institute
Show and comprise following flow process:
S1: on and off switch closes, and state memory counter sets to 0, and LED current is original state；
The electric current of power tube is flow through in the detection of S2: current detection module, and output high level when having electric current to flow through power tube, without electricity
Output low level when stream flows through power tube；
S3: judge high level lasting time；If high level lasting time is less than threshold value Ton, performs S10, otherwise enter S4；
S4: judge low duration；If low duration is more than threshold value Tclaer, perform S11；If low level
Persistent period is less than threshold value Toff, performs S12；Otherwise enter S5；
When S5: low duration is more than threshold value Toff and less than threshold value Tclaer, state memory counter adds 1；
Whether S6: state memory counter count value is equal to setting value；If during equal to setting value, perform S13；Otherwise enter
S7；
S7: during less than setting value, it is judged that module exports a state control signal；
S8: handover module is according to state control signal, output voltage control signal, and different state control signal correspondences is not
Same voltage control signal；
S9: drive module according to voltage control signal, control the grid voltage of power tube, thus control the electricity of power tube
Stream, i.e. flows through the size of current of LED；Enter S3；
S10: high level lasting time is less than threshold value Ton, and state memory counter keeps, and LED current is constant；
S11: low duration is more than threshold value Tclaer, and state memory counter resets, during switch Guan Bi next time,
LED current is original state；
S12: low duration is less than threshold value Toff, and state memory counter keeps, and LED current is constant；
S13: during equal to setting value, state memory counter resets, and during switch Guan Bi next time, LED current is original state.
Different state memory counter count values, corresponding different state control signal, thus corresponding electricity different for LED
Stream size, the LED current size that state memory counter is corresponding when being zero is original state.
As shown in Figure 8, a switch motion sequential flow process includes:
1, after start, chip is loaded into current state (original state), and current detection module detection has electric current.
2, power tube source electrode detects that high level lasting time T1, more than Ton, is calculated as useful signal, reads next state.
3, after switch OFF power tube source-end detection less than electric current
4, power tube source no current duration T 2 is more than Toff but less than judging after Tclear that cut-off signal is effective,
The next state of system incision.
As it is shown in figure 9, a switch motion sequential flow process includes:
1, after start, chip is loaded into current state (original state), and current detection module detection power tube source electrode has electric current,
Output high level signal；
2, judge module detection power tube source electrode high level lasting time T1 is more than Ton, is calculated as useful signal, reads next
Individual state.
3, power tube source electrode no current is detected at switch OFF after current detection module.
4, judge module power tube source no current duration T 2 detected less than judge cut-off signal after Toff without
Effect, system mode keeps.
As shown in Figure 10, a switch motion sequential flow process includes:
1, after start, chip is loaded into current state (original state), and current detection module detection power tube source electrode has electric current,
Output high level signal；
2, judge module detection power tube source electrode high level lasting time T1 is more than Ton, is calculated as useful signal, reads next
Individual state.
3, power tube source electrode no current is detected at switch OFF after current detection module.
4, judge module detects that power tube source no current duration T 2 is more than judging after Tclear that cut-off signal has
Effect, system resets, and starts original state during switch Guan Bi next time.
The foregoing is only preferred embodiments of the present utility model, not in order to limit this utility model, all in this reality
With any amendment, equivalent and the improvement etc. made within novel spirit and principle, should be included in of the present utility model
Within protection domain.
Claims (10)
1. a light adjusting circuit, including rectification circuit, LED string, current detection module (10), judge module (20), switching mould
Block (30), driving module (40), sample circuit (60), at least one power tube (70；701,702) and supply module (80)；
At least one power tube (70 described；701,702) input connects the negative pole of external LED string；
At least one power tube (70 described；701,702) outfan connects current detection module (10) and sample circuit (60)；
Described current detection module (10) is operatively coupled with described judge module (20) and is connected；
Described judge module (20) is operatively coupled with described handover module (30) and is connected；
Described handover module (30) is operatively coupled with described driving module (40) and is connected；
Described driving module (40) connects described power tube (70；701,702) control end；
Described current detection module (10) is used for detecting described power tube (70；701,702) whether there is electric current to flow through, and export inspection
Survey signal；
Described judge module (20) determines described power tube (70 according to described detection signal；701,702) break-make of upper electric current is held
The continuous time also exports judgement signal；
Described handover module (30) controls described driving module (40) output different driving signal according to described judgement signal；
Described power tube (70；701,702) according to described driving signal switched conductive state.
Light adjusting circuit the most according to claim 1, it is characterised in that: described current detection module (10) includes at least one ratio
Relatively device circuit, when there being electric current to flow through power tube, comparator is output as height, and when not having electric current to flow through power tube, comparator exports
For low, the signal of described current detection module output is detection signal.
Light adjusting circuit the most according to claim 2, it is characterised in that: the input of described comparator is power tube (70；701,
702) output voltage (Vi1；Vi1, Vi2) and reference voltage (V1), different power tubes connects different comparator electricity respectively
Road, the reference voltage of different comparator inputs is identical, or different.
Light adjusting circuit the most according to claim 1, it is characterised in that: described judge module (20) include logic judging circuit,
Trigger circuit；Described logic judging circuit is connected with the outfan of comparator in described current detection module (10), described logic
Decision circuitry judges described power tube (70 for the detection signal exported according to described current detection module (10)；701,702)
The upper current signal break-make persistent period, when the current signal break-make persistent period meets pre-conditioned, logic judging circuit output is sentenced
Break signal is to triggering circuit, and the output of described triggering circuit is touched and sent signals to handover module (30).
Light adjusting circuit the most according to claim 4, it is characterised in that: described pre-conditioned include: current signal is connected and continued
Time is more than Second Threshold more than first threshold and break time and is less than the 3rd threshold value, or break time is more than
3rd threshold value.
Light adjusting circuit the most according to claim 1, it is characterised in that: described handover module (30) include state storage circuitry and
Gate control circuit, described storage circuit connects described gate control circuit；Described storage circuit includes enumerator, is used for storing
Switch effective on off state and effective on off state is counted；Described gate control circuit is defeated according to the numerical value of described enumerator
Going out gate control signal, the corresponding different described gate control signal of different described numerical value, different described gatings controls letter
Number gating that correspondence is different controls voltage (Vp).
Light adjusting circuit the most according to claim 6, it is characterised in that: described driving module (40) includes that at least one both-end is defeated
Entering comparison circuit, an input of described double-width grinding comparison circuit connects power tube (70；701,702) output voltage
(Vi1；Vi1, Vi2), another input connects the described gating of described gate control circuit output and controls voltage (Vp), described
The outfan of double-width grinding comparison circuit connects the control end of described power tube, the outfan of different double-width grinding comparison circuits
Connect different power tubes and control end.
Light adjusting circuit the most according to claim 1, it is characterised in that: also including that excess temperature compensates circuit, described excess temperature compensates electricity
Road is connected with described handover module, and when chip temperature exceedes design temperature, described excess temperature compensates circuit and exported temperature control
Signal, described handover module controls the output voltage of described driving module according to described excess temperature control signal, thus controls described
The size of current of power tube outfan.
Light adjusting circuit the most according to claim 1, it is characterised in that: described sample circuit (60) includes sampling resistor (R2；
R21, R22), described sampling resistor one end connects described power tube (70；701,702) outfan and described current detection module
(10), the other end connects the negative pole of external rectification circuit.
10. a LED illumination circuit, including the described light adjusting circuit of one of claim 1-9, described LED illumination circuit also includes
On and off switch, described on and off switch connects rectification circuit, and for control circuit break-make, the positive pole of described rectification circuit connects LED
The positive pole of lamp string, the supply module of described light adjusting circuit, the negative pole of described rectification circuit connects the sample circuit of light adjusting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620580029.6U CN205830088U (en) | 2016-06-15 | 2016-06-15 | A kind of light adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620580029.6U CN205830088U (en) | 2016-06-15 | 2016-06-15 | A kind of light adjusting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205830088U true CN205830088U (en) | 2016-12-21 |
Family
ID=57569340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620580029.6U Withdrawn - After Issue CN205830088U (en) | 2016-06-15 | 2016-06-15 | A kind of light adjusting circuit |
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| CN (1) | CN205830088U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105934040A (en) * | 2016-06-15 | 2016-09-07 | 陕西亚成微电子股份有限公司 | Dimming circuit |
| CN114449699A (en) * | 2020-11-03 | 2022-05-06 | 西安钛铂锶电子科技有限公司 | Display driving chip and LED lamp panel |
-
2016
- 2016-06-15 CN CN201620580029.6U patent/CN205830088U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105934040A (en) * | 2016-06-15 | 2016-09-07 | 陕西亚成微电子股份有限公司 | Dimming circuit |
| CN105934040B (en) * | 2016-06-15 | 2018-06-19 | 陕西亚成微电子股份有限公司 | A kind of light adjusting circuit |
| CN114449699A (en) * | 2020-11-03 | 2022-05-06 | 西安钛铂锶电子科技有限公司 | Display driving chip and LED lamp panel |
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