CN208158952U - LED drive module, light emitting device and electronic equipment - Google Patents
LED drive module, light emitting device and electronic equipment Download PDFInfo
- Publication number
- CN208158952U CN208158952U CN201820714510.9U CN201820714510U CN208158952U CN 208158952 U CN208158952 U CN 208158952U CN 201820714510 U CN201820714510 U CN 201820714510U CN 208158952 U CN208158952 U CN 208158952U
- Authority
- CN
- China
- Prior art keywords
- switch device
- switch
- circuit
- control
- drive module
- 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.)
- Active
Links
Classifications
-
- 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]
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a kind of LED drive module, light emitting device and electronic equipments; the drive module includes load circuit, control circuit and protection circuit; load circuit includes that first switch device, sampling resistor and the interface unit for connecting LED light, three are connected in series between the power end of drive module and ground terminal；Control circuit carries out first with load circuit and connect, and the first connection is arranged to export first switch control signal to the control terminal of first switch device by control circuit；Protecting circuit includes second switch device; protection circuit is connect with load circuit progress second and third; second connection is arranged to the switch state of the partial pressure control second switch device by sampling resistor, and third connection is provided so that circuit is protected to export closing control signal to the control terminal of first switch device when the partial pressure is more than setting value.
Description
Technical field
The utility model relates to field of LED drive technologies, more specifically, the utility model relates to a kind of LED drive module,
A kind of LED light emission device and a kind of electronic equipment.
Background technique
Light emitting diode is referred to as LED (Light Emitting Diode), is a kind of semiconductor devices, by 2~3 volts
Low voltage drive.LED drive module refers to the power supply adjustment electronic device that driving LED shines or driving LED is worked normally.
Existing LED drive module mostly uses dedicated LED drive chip, and the circuit structure of driving chip is complex,
It is expensive, performance is had in some applications and mismatches the problem for causing cost excessively high, for example, in the finger of drive electronics
Show in the luminous application of lamp.But since LED is the semiconductor devices of characteristic sensitivity, and there is negative temperature characteristic, thus is applying
It needs to carry out steady-working state and protection to it in the process, therefore, the existing drive by single switch controlled LED operation
Dynamic circuit because of overcurrent there may be causing LED to burn, therefore, it is necessary to provide, a kind of structure is simple can be had again
Imitate the driving structure for protecting LED not to be burned out.
Utility model content
One purpose of the utility model embodiment is to provide a kind of new technical solution of LED drive module, with effective
Protection LED will not be burned out because of overcurrent.
It is according to the present utility model in a first aspect, providing a kind of LED drive module comprising：
Load circuit, the load circuit include first switch device, sampling resistor and the connector for connecting LED light
Part, the first switch device, sampling resistor and the interface unit are connected in series in the power end of the drive module and connect
Between ground terminal；
Control circuit, the control circuit carry out first with the load circuit and connect, and first connection is arranged to
First switch, which is exported, to the control terminal of the first switch device by the control circuit controls signal；And
Circuit is protected, the protection circuit includes second switch device, and the protection circuit and the load circuit carry out
Second connection, second connection are arranged to control the switch of the second switch device by the partial pressure of the sampling resistor
State；The protection circuit also carries out third connection with the load circuit, and the third connection is provided so that the guarantor
Protection circuit exports closing control signal to the control terminal of the first switch device when the partial pressure is more than setting value.
Optionally, the control circuit includes third switching device, and first connection includes：The third switching device
One end connect as the output end of the control circuit with the control terminal of the first switch device.
Optionally, the control circuit further includes pull-up resistor, and the pull-up resistor is connected to the third switching device
Described one end and the power end between.
Optionally, the control circuit includes reference voltage input and control signal input, and the control signal is defeated
Enter end and is arranged to the relatively described reference voltage input to the output second switch control of the control terminal of the third switching device
Signal.
Optionally, the reference voltage input is the ground terminal.
Optionally, the third switching device is NPN type triode or NMOS tube.
Optionally, the third, which connects, includes：The second switch device is connected to the control of the first switch device
Between end and the ground terminal.
Optionally, the first switch device is NMOS tube, and the second switch device is NPN type triode；
It is described second connection include：The base stage of the second switch device is connect with the hot end of the sampling resistor,
The emitter of the second switch device and the cold end of the sampling resistor are connect with the ground terminal；
The third connects：The grid of the collector of the second switch device and the first switch device connects
It connects, the emitter of the second switch device is connect with the ground terminal, wherein the grid of the first switch device is described
The control terminal of first switch device.
Second aspect according to the present utility model additionally provides a kind of LED light emission device comprising LED light and according to this
LED drive module described in utility model first aspect, the LED light are connected on load circuit by interface unit.
The third aspect according to the present utility model, additionally provides a kind of electronic equipment comprising at least one is according to this reality
Described in the LED light emission device described in novel second aspect and at least one second aspect according to the present utility model for described in
LED light emission device the power supply device of working power, the anode of the power supply device and the cathode point of the power supply device are provided
It is not correspondingly connected with the power end of each LED drive module and ground terminal.
One beneficial effect of the utility model is, is used and is divided according to the LED drive module of the utility model embodiment
Scattered electronic component is formed, and opposite integrated chip has low-cost advantage；Moreover, the LED of the utility model embodiment drives
Module is provided with protection circuit, can turn off control to load circuit by detecting the electric current of load circuit, realize effective
Protect the purpose that LED light is not burned out.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiments of the present invention, and
And together with its explanation for explaining the principles of the present invention.
Fig. 1 is the functional block diagram according to the LED drive module of the utility model embodiment；
Fig. 2 is the circuit diagram according to the LED drive module of one example of the utility model；
Fig. 3 is the circuit diagram according to the LED drive module of the utility model another example；
Fig. 4 is the circuit diagram according to the LED drive module of the utility model third example；
Fig. 5 is the circuit diagram according to the LED drive module of the 4th example of the utility model；
Fig. 6 is the functional block diagram according to the LED light emission device of the utility model embodiment；
Fig. 7 is the functional block diagram according to the electronic equipment of the utility model embodiment.
Specific embodiment
The various exemplary embodiments of the utility model are described in detail now with reference to attached drawing.It should be noted that：Unless another
It illustrates outside, the component and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is unlimited
The scope of the utility model processed.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to this is practical
Novel and its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
<Drive module embodiment>
Fig. 1 is the functional block diagram according to the LED drive module of the utility model embodiment.
According to Fig. 1, the LED drive module of the embodiment includes control circuit 100, load circuit 200 and protection electricity
Road 300.Control circuit 100 is used to control the output state of load circuit 200, and then controls lighting and extinguishing for LED light.Protection
Circuit 300 is used to detect the electric current of load circuit 200, and cuts off in the case where the electric current of load circuit 200 is more than setting value
Load circuit 200 is not damaged with effective protection LED light.
The setting value of corresponding current can be arranged according to the performance of LED light, for example, the setting value of corresponding current is selected as
20mA。
The load circuit 200 may include first switch device, sampling resistor and the interface unit for connecting LED light,
First switch device, sampling resistor and interface unit are connected in series between the power end of drive module and ground terminal.External electrical
Source can provide DC supply to drive module by power end and ground terminal.
In an example of the utility model, which is, for example, 4.5V.
According to the load circuit 200, when first switch break-over of device, load circuit 200 forms current loop, LED light point
It is bright；When second switch device ends, load circuit 200 forms open circuit, and LED light is extinguished.Control circuit 100 and protection circuit 300
The output state of load circuit 200 can be controlled by first switch device.
Interface unit can have any connection structure that can be connected to LED light on load circuit, can with but not
It is confined to be the pad for welding LED light, for connecting the connecting lead wire of LED light, or the connection for connecting LED light is inserted
Seat.
In an example of the utility model, which can also include filter capacitor, which connects
It connects between power end and ground terminal, to filter out the clutter and alternating component in external power supply by filter capacitor.
In an example of the utility model, which can choose the switching device of voltage-type, such as
Metal-oxide-semiconductor.
In an example of the utility model, interface unit is connected between power end and first switch device.
In an example of the utility model, sampling resistor is connected between first switch device and ground terminal.
Control circuit 100 carries out first with load circuit 200 and connect, which is arranged to pass through control circuit
100 control signal to the control terminal of first switch device output first switch.
First switch control signal controls signal for controlling first switch break-over of device or cut-off, in first switch
When controlling first switch break-over of device, the work of load circuit 200 generates electric current, when electric current is more than setting value, protects circuit 300
It works and disconnects load circuit 200；In first switch control signal control first switch device cut-off, load circuit 200 is disconnected
It opens and does not export, at this point, the electric current of load circuit 200 is zero, protection circuit 300 does not work.
Protecting circuit 300 includes second switch device, and protection circuit 300 and load circuit 200 progress second is connect, this
Two connections are arranged to the switch state of the partial pressure control second switch device by sampling resistor, and then realize protection circuit
300 detect the purpose of the electric current of load circuit 200 by sampling resistor.
The protection circuit 300 also carries out third connection with load circuit 200, and third connection is provided so that protection electricity
Road 300 exports closing control signal to the control terminal of first switch device when the partial pressure of sampling resistor is more than setting value.Here,
The partial pressure of sampling resistor and the electric current phase mapping of load circuit 200, the setting value phase of the setting value of corresponding current and corresponding partial pressure
Mapping.
According to the utility model embodiment, load circuit 200 passes through sampling resistor for the current feedback of load circuit 200
To protection circuit 300, protection circuit 300 passes through the switch state for reflecting that the voltage of the size of current controls second switch device,
Second switch device will export different voltage under different switch states, which will be further used for controlling first switch
Device is in close state, load circuit 200 can be cut off in the case where the electric current of load circuit 200 is more than setting value,
The not impaired purpose of LED light is protected in realization.
In an example of the utility model, control circuit 100 includes third switching device, accordingly, the first connection
Including：One end of third switching device is connect as the output end of control circuit with the control terminal of first switch device, to pass through
The end output first switch of third switching device controls signal to first switch device.
In this example embodiment, setting third switching device can play the role of that front stage circuits and late-class circuit is isolated, to keep away
Exempt from that circuit 300 is protected to work and influence control circuit 100.
In an example of the utility model, control circuit 100 can further include pull-up resistor, pull-up electricity
Resistance is connected between the end (i.e. the output end of control circuit) of third switching device and power end.
In this example embodiment, the first switch of output high level when third switching device ends of control circuit 100 controls letter
Number, low level first switch control signal is exported in third switch device conductive, is conducive to simplify circuit structure.
In an example of the utility model, control circuit 100 can be provided outside control signal input connection
Control signal generator, to receive the control signal of external control signal generator generation, such as PWM wave, which makees
Signal is controlled for control circuit 100, and through the output end of control circuit 100 output first switch.
In an example of the utility model, control circuit 100 can also itself include control signal generator, the control
The control signal that signal generator processed generates acts in control circuit 100 via internal control signal input, and through controlling
The output end output first switch of circuit 100 processed controls signal.
In an example of the utility model, control circuit may include reference voltage input and control signal input
End, control signal input are arranged to the opposite reference voltage input to third switching device output second switch control letter
Number, i.e. output first switch under the action of second switch controls signal of control circuit 100 controls signal.
In an example of the utility model, control that reference voltage input can further with third switching device
End connection, to provide reference voltage to the control terminal of third switching device.
For example, third switching device be NPN type triode, the control circuit 100 can further include first resistor,
Second resistance and 3rd resistor, reference voltage input via first resistor, (open with the base stage of third switching device by corresponding third
Close device control terminal) connection, second resistance be connected to third switching device base stage and third switching device emitter it
Between, 3rd resistor is connected between control signal input and the emitter of third switching device.Accordingly, the first connection packet
It includes：The collector of third switching device is connect as the output end of control circuit 100 with the control terminal of first switch device.
In another example third switching device is NMOS tube, which can further include first resistor, the
Two resistance and 3rd resistor, via first resistor, (corresponding third switchs reference voltage input with the grid of third switching device
The control terminal of device) it connects, second resistance is connected between the grid of third switching device and the source electrode of third switching device, the
Three resistance are connected between control signal input and the source electrode of third switching device.Accordingly, first connection include：Third is opened
The drain electrode for closing device is connect as the output end of control circuit 100 with the control terminal of first switch device.
In this example embodiment, when control signal input is high level, third switching device cut-off, in this way, control circuit
100 can export the first switch signal of high level to the control terminal of first switch device under the action of pull-up resistor；Work as control
When signal input part is low level, third switch device conductive, in this way, control circuit 100 will export low level first switch
Signal to first switch device control terminal.In this way, first switch device can be connected under the control action of control circuit 100
Or cut-off.
In an example of the utility model, reference voltage input can be ground terminal, and control circuit 100 further includes
First resistor, second resistance and 3rd resistor.It in this example embodiment, will be without being additionally provided reference voltage.
For example, third switching device is NPN type triode, control signal input is via first resistor and third derailing switch
Base stage (control terminal of corresponding third switching device) connection of part, second resistance are connected to the base stage and third of third switching device
Between the emitter of switching device, 3rd resistor is connected between the emitter and ground terminal of third switching device.Accordingly,
One connection include：The collector of third switching device is as the output end of control circuit 100 and the control terminal of first switch device
Connection.
In another example third switching device is NMOS tube, control signal input is via first resistor and third switching device
The grid control terminal of third switching device (corresponding) connection, second resistance is connected to the grid of third switching device and third is opened
Between the source electrode for closing device, 3rd resistor is connected between the source electrode and ground terminal of third switching device.Accordingly, the first connection
Including：The drain electrode of third switching device is connect as the output end of control circuit 100 with the control terminal of first switch device.
In this example embodiment, when control signal input is low level, third switching device cut-off, in this way, control circuit
100 can export the first switch signal of high level to the control terminal of first switch device under the action of pull-up resistor；Work as control
When signal input part is high level, third switch device conductive, in this way, control circuit 100 will export low level first switch
Signal to first switch device control terminal.In this way, first switch device can be connected under the control action of control circuit 100
Or cut-off.
In an example of the utility model, the second switch device of protection circuit 300 is connected to first switch device
Control terminal and ground terminal between, close control to export by one end of second switch device to the control terminal of first switch device
Signal processed, wherein the control terminal of first switch device is also connect with the output end of control circuit 100, that is, first switch device
Switch state be the first switch control signal and coefficient structure of closing control signal.In this way, in second switch device
It, can be when the first switch that the output end of control circuit 100 exports high level controls signal, by first switch device when conducting
The current potential of control terminal be pulled low to low level, to realize the purpose for disconnecting load circuit 200.
Further, in an example of the utility model, first switch device can be NMOS tube, second switch device
Part can be NPN type triode.
In this example embodiment, it is above second connection may include：The base stage of second switch device and the high potential of sampling resistor
End connection, the emitter of second switch device and the cold end of sampling resistor are connect with ground terminal.
In this example embodiment, the above third, which connects, may include：The collector of second switch device and first switch device
Grid connection, wherein the grid of first switch device is the control terminal of first switch device.
According to the example, second switch device will be connected when the electric current of load circuit 200 is more than setting value, here, can
To select matched sampling resistor according to the cut-in voltage of the setting value and second switch device, at this point, second switch device two
The voltage at end will decrease to the cut-in voltage of first switch device hereinafter, load circuit 200 breaks because first switch device ends
It opens, realizes the protection to LED light.
<Example>
Fig. 2 is the circuit diagram according to the LED drive module of one example of the utility model.
According to Fig.2, in this example embodiment, load circuit 200 includes first switch device Q1, sampling resistor R73, is used for
Connect the interface unit JD and filter capacitor C26 of LED light.Interface unit JD is connected to power end VDD and first switch device Q1
Between, sampling resistor R73 is connected between first switch device and ground terminal, and filter capacitor C26 is connected to power end VDD and connects
Between ground terminal.
In this example embodiment, first switch device Q1 is NMOS tube, and the control terminal of first switch device Q1 is first switch device
The grid of part Q1.
In this example embodiment, control circuit 100 includes third switching device Q3, pull-up resistor R76, first resistor R1, second
Resistance R2 and 3rd resistor R3, wherein third switching device Q3 is NPN type triode.
In this example embodiment, reference voltage input VD is connect via first resistor R1 with the base stage of third switching device, the
Two resistance R2 are connected between the base stage of third switching device Q3 and the emitter of third switching device Q3,3rd resistor R3 connection
Between control signal input LED_C and the emitter of third switching device Q3.
In this example embodiment, first connection include：Output end of the collector of third switching device Q3 as control circuit 100
It connect, i.e., is connect with the grid of first switch device Q1 with the control terminal of first switch device Q1.
In this example embodiment, protection circuit 300 includes second switch device Q2, wherein second switch device Q2 is NPN type three
Pole pipe.
In this example embodiment, second connection include：The base stage of second switch device Q2 and the hot end of sampling resistor R73
(being also simultaneously the source electrode of first switch device Q1) connection, the emitter of second switch device Q2 and low electricity of sampling resistor R73
Position end is connect with ground terminal.
In this example embodiment, third, which connects, includes：The collector of second switch device Q2 and the grid of first switch device Q1
Connection.
In this example embodiment, when control signal input LED_C receives high level signal, third switching device Q3 is cut
Only, control circuit 100 exports the first switch signal of high level to first switch device Q1's under the action of pull-up resistor R76
Control terminal.At this point, first switch device Q1 is connected, load circuit 200 can generate electric current in the case where connecting LED light.When
When the electric current is more than that setting value makes the partial pressure of sampling resistor R73 reach the cut-in voltage of second switch device Q2, second switch
Device Q2 conducting, and then the grid voltage of first switch device Q1 is pulled low to cut-in voltage hereinafter, first switch device Q1 is cut
Only, load circuit 200 disconnects.
In this example embodiment, when control signal input LED_C receives low level signal, third switch device conductive,
In this way, control circuit 100 will export control terminal of the low level first switch signal to first switch device Q1, first switch device
Part Q1 cut-off, load circuit 200 disconnect, at this point, protection circuit 200 does not work always.
Fig. 3 is the circuit diagram according to the LED drive module of second example of the utility model.
According to Fig.3, the difference of the example and example shown in Fig. 2 on circuit composition is, the of control circuit 100
Three switching device Q3 are NMOS tube.It will be clear to someone skilled in the art that third switching device Q3 uses the switch of different structure
Pipe, the parameter that can according to need the switching device to drive module, resistance etc. are adaptively adjusted.
In this example embodiment, reference voltage input VD is connect via first resistor R1 with the grid of third switching device Q3,
Second resistance R2 is connected between the grid of third switching device Q3 and the source electrode of third switching device Q3,3rd resistor R3 connection
Between control signal input LED_C and the source electrode of third switching device Q3.
In this example embodiment, first connection include：Third switching device Q3 drain electrode as control circuit 100 output end and
The control terminal of first switch device Q1 connects, i.e., connect with the grid of first switch device Q1.
In this example embodiment, when control signal input LED_C receives high level signal, third switching device Q3 is cut
Only, control circuit 100 exports the first switch signal of high level to first switch device Q1's under the action of pull-up resistor R76
Control terminal.At this point, first switch device Q1 is connected, load circuit 200 can generate electric current in the case where connecting LED light.When
When the electric current is more than that setting value makes the partial pressure of sampling resistor R73 reach the cut-in voltage of second switch device Q2, second switch
Device Q2 conducting, and then the grid voltage of first switch device Q1 is pulled low to cut-in voltage hereinafter, first switch device Q1 is cut
Only, load circuit 200 disconnects.
In this example embodiment, when control signal input LED_C receives low level signal, third switch device conductive,
In this way, control circuit 100 will export control terminal of the low level first switch signal to first switch device Q1, first switch device
Part Q1 cut-off, load circuit 200 disconnect, at this point, protection circuit 200 does not work always.
Fig. 4 is the circuit diagram according to the LED drive module of the utility model third example.
According to Fig.4, which is with difference of the example shown in Fig. 3 on circuit composition, the base of control circuit 100
Quasi- voltage input end is ground terminal.
In this example embodiment, control signal input LED_C is (right via first resistor R1 and the grid of third switching device Q3
Answer the control terminal of third switching device) it connects, second resistance R2 is connected to the grid and third derailing switch of third switching device Q3
Between the source electrode of part Q3,3rd resistor R3 is connected between the source electrode and ground terminal of third switching device Q3.
In this example embodiment, first connection include：Third switching device Q3 drain electrode as control circuit 100 output end and
The control terminal of first switch device Q1 connects, i.e., connect with the grid of first switch device Q1.
In this example embodiment, when control signal input LED_C receives low level signal, third switching device Q3 is cut
Only, control circuit 100 exports the first switch signal of high level to first switch device Q1's under the action of pull-up resistor R76
Control terminal.At this point, first switch device Q1 is connected, load circuit 200 can generate electric current in the case where connecting LED light.When
When the electric current is more than that setting value makes the partial pressure of sampling resistor R73 reach the cut-in voltage of second switch device Q2, second switch
Device Q2 conducting, and then the grid voltage of first switch device Q1 is pulled low to cut-in voltage hereinafter, first switch device Q1 is cut
Only, load circuit 200 disconnects.
In this example embodiment, when control signal input LED_C receives high level signal, third switch device conductive,
In this way, control circuit 100 will export control terminal of the low level first switch signal to first switch device Q1, first switch device
Part Q1 cut-off, load circuit 200 disconnect, at this point, protection circuit 200 does not work always.
Fig. 5 is the circuit diagram according to the LED drive module of the 4th example of the utility model.
According to Fig.5, which is with difference of the example shown in Fig. 1 on circuit composition, the base of control circuit 100
Quasi- voltage input end is ground terminal.
In this example embodiment, control signal input LED_C is (right via first resistor R1 and the base stage of third switching device Q3
Answer the control terminal of third switching device) it connects, second resistance R2 is connected to the base stage and third derailing switch of third switching device Q3
Between the emitter of part Q3,3rd resistor R3 is connected between the emitter and ground terminal of third switching device Q3.
In this example embodiment, first connection include：Output end of the collector of third switching device Q3 as control circuit 100
It connect, i.e., is connect with the grid of first switch device Q1 with the control terminal of first switch device Q1.
In this example embodiment, when control signal input LED_C receives low level signal, third switching device Q3 is cut
Only, control circuit 100 exports the first switch signal of high level to first switch device Q1's under the action of pull-up resistor R76
Control terminal.At this point, first switch device Q1 is connected, load circuit 200 can generate electric current in the case where connecting LED light.When
When the electric current is more than that setting value makes the partial pressure of sampling resistor R73 reach the cut-in voltage of second switch device Q2, second switch
Device Q2 conducting, and then the grid voltage of first switch device Q1 is pulled low to cut-in voltage hereinafter, first switch device Q1 is cut
Only, load circuit 200 disconnects.
In this example embodiment, when control signal input LED_C receives high level signal, third switch device conductive,
In this way, control circuit 100 will export control terminal of the low level first switch signal to first switch device Q1, first switch device
Part Q1 cut-off, load circuit 200 disconnect, at this point, protection circuit 200 does not work always.
Fig. 6 is the functional block diagram according to the LED light emission device of the utility model embodiment.
According to Fig.6, the LED light emission device of the embodiment includes LED light L1 and is arbitrarily implemented according to the utility model
The LED drive module of example, LED light L1 are connected on load circuit 200 by interface unit JD.
In this embodiment, the connection structure of LED light L1 and interface unit JD can be according to the structure of interface unit JD
Line connection, welding, grafting etc..
In an example of the utility model, the control circuit 100 of LED drive module, which does not have, controls signal
Device, the LED light emission device can also include that the control signal generator is connect with the control signal input of control circuit 100.
In an example of the utility model, the control circuit 100 of LED drive module does not have reference voltage circuit,
The LED light emission device can also include that reference voltage circuit is connect with the reference voltage input of control circuit 100.
According to the LED light emission device of the utility model embodiment, after providing DC supply by external power supply, just
Lighting and extinguishing for LED light L1 can be controlled, and under the action of protecting circuit 300 under the control action of control circuit 100,
The operating current of LED light L1 is protected to be no more than setting value.
Fig. 7 is the functional block diagram according to the electronic equipment of the utility model embodiment.
According to Fig.7, the electronic equipment of the embodiment includes at least one according to the utility model any embodiment
LED light emission device 710 further includes providing the power supply device 720 of working power, the power supply device for each LED light emission device 710
720 anode and cathode and the power end and ground terminal of LED drive module 710 is correspondingly connected with.
In an example of the utility model, the LED light of LED light emission device 710 can be the instruction of electronic equipment 700
Lamp.
In an example of the utility model, electronic equipment includes at least one set of LED light emission device, and every group includes again three
A LED light emission device 710, first LED light emission device 710 use red LED lamp, and second LED light emission device 710 is using green
Color LED light, third LED light emission device 710 use blue LED lamp.
The equipment that the electronic equipment 700 can be any required setting indicator light, such as mobile phone, charger, wearable set
Standby, any type of computer installation etc..
The difference of the various embodiments described above primary focus description and other embodiments, but those skilled in the art should be clear
Chu, the various embodiments described above can according to need exclusive use or are combined with each other.
Although being described in detail by some specific embodiments of the example to the utility model, this field
It is to be understood by the skilled artisans that example above merely to be illustrated, rather than in order to limit the scope of the utility model.This
Field it is to be understood by the skilled artisans that can not depart from the scope of the utility model and spirit in the case where, to above embodiments
It modifies.The scope of the utility model is defined by the following claims.
Claims (10)
1. a kind of LED drive module, which is characterized in that including：
Load circuit, the load circuit include first switch device, sampling resistor and the interface unit for connecting LED light,
The first switch device, sampling resistor and the interface unit are connected in series in the power end and ground terminal of the drive module
Between；
Control circuit, the control circuit carry out first with the load circuit and connect, and first connection is arranged to pass through
The control circuit controls signal to the control terminal of first switch device output first switch；And
Circuit is protected, the protection circuit includes second switch device, and the protection circuit and the load circuit carry out second
Connection, second connection are arranged to control the switch shape of the second switch device by the partial pressure of the sampling resistor
State；The protection circuit also carries out third connection with the load circuit, and the third connection is provided so that the protection
Circuit exports closing control signal to the control terminal of the first switch device when the partial pressure is more than setting value.
2. LED drive module according to claim 1, which is characterized in that the control circuit includes third switching device,
It is described first connection include：Output end and the first switch of the one end of the third switching device as the control circuit
The control terminal of device connects.
3. LED drive module according to claim 2, which is characterized in that the control circuit further includes pull-up resistor, institute
Pull-up resistor is stated to be connected between described one end and the power end of the third switching device.
4. LED drive module according to claim 3, which is characterized in that the control circuit includes reference voltage input
End and control signal input, the control signal input are arranged to the relatively described reference voltage input to the third
The control terminal output second switch of switching device controls signal.
5. LED drive module according to claim 4, which is characterized in that the reference voltage input is the ground connection
End.
6. LED drive module according to claim 4 or 5, which is characterized in that the third switching device is NPN type three
Pole pipe or NMOS tube.
7. LED drive module according to claim 3, which is characterized in that the third, which connects, includes：The second switch
Device is connected between the control terminal and the ground terminal of the first switch device.
8. LED drive module according to claim 7, which is characterized in that the first switch device is NMOS tube, described
Second switch device is NPN type triode；
It is described second connection include：The base stage of the second switch device is connect with the hot end of the sampling resistor, described
The cold end of the emitter of second switch device and the sampling resistor is connect with the ground terminal；
The third connects：The collector of the second switch device is connect with the grid of the first switch device, institute
The emitter for stating second switch device is connect with the ground terminal, wherein the grid of the first switch device is described first
The control terminal of switching device.
9. a kind of LED light emission device, which is characterized in that driven including LED light and LED described in any item of the claim 1 to 8
Dynamic model block, the LED light are connected on load circuit by interface unit.
10. a kind of electronic equipment, which is characterized in that including at least one LED light emission device as claimed in claim 9 and be described
At least one LED light emission device as claimed in claim 9 provides the power supply device of working power, the anode of the power supply device and
The cathode of the power supply device is correspondingly connected with the power end of each LED drive module and ground terminal respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820714510.9U CN208158952U (en) | 2018-05-14 | 2018-05-14 | LED drive module, light emitting device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820714510.9U CN208158952U (en) | 2018-05-14 | 2018-05-14 | LED drive module, light emitting device and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208158952U true CN208158952U (en) | 2018-11-27 |
Family
ID=64390679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820714510.9U Active CN208158952U (en) | 2018-05-14 | 2018-05-14 | LED drive module, light emitting device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208158952U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110246287A (en) * | 2019-07-17 | 2019-09-17 | 广州通微物联科技有限公司 | A kind of wireless lavatory position indicator light |
| CN112382232A (en) * | 2020-11-26 | 2021-02-19 | 深圳市洲明科技股份有限公司 | LED driving device and LED display screen |
-
2018
- 2018-05-14 CN CN201820714510.9U patent/CN208158952U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110246287A (en) * | 2019-07-17 | 2019-09-17 | 广州通微物联科技有限公司 | A kind of wireless lavatory position indicator light |
| CN112382232A (en) * | 2020-11-26 | 2021-02-19 | 深圳市洲明科技股份有限公司 | LED driving device and LED display screen |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103957636A (en) | Two-wire dimming circuit | |
| CN208158952U (en) | LED drive module, light emitting device and electronic equipment | |
| CN1316738C (en) | Electronic switch | |
| CN109526093A (en) | LED light tube drive circuit and LED illumination device | |
| CN109287056A (en) | A kind of single-fire-wire electronic switch | |
| CN101965077B (en) | Protection circuit for light emitting diode light | |
| CN108052041A (en) | Remote on-off control device and system | |
| CN209132405U (en) | Switching-on and switching-off state detection circuit | |
| CN207020501U (en) | A kind of single live wire switch and double control switch circuit | |
| US11588316B2 (en) | Circuit with timing function and leakage protection plug | |
| CN205283887U (en) | LED dimmer circuit and LED drive circuit | |
| CN107528307B (en) | Protection circuit for short circuit of LED power supply load | |
| CN108471656A (en) | A kind of light source driving circuit and lighting device | |
| WO2021012156A1 (en) | Lamp tube and protection circuit and protection device applied to same | |
| CN206149552U (en) | A dimmer circuit for non - isolation LED drive power supply | |
| CN105578663A (en) | LED display driving circuit | |
| CN207096857U (en) | A kind of constant-current circuit of amplifier output voltage clamper in driving tube threshold voltage | |
| CN106937437B (en) | It is a kind of for exchange input ON-OFF control circuit | |
| CN109116267A (en) | Switching-on and switching-off state detection circuit | |
| CN205280807U (en) | Circuit arrangement with electrification of ground wire detects function | |
| CN113518486B (en) | Lighting control system and method based on environment feedback | |
| CN103582224B (en) | Lamps and lanterns and its overvoltage crowbar | |
| KR200498026Y1 (en) | Alternating current transmission circuit and socket | |
| CN203859905U (en) | Two-wire system light dimming circuit | |
| CN208768046U (en) | A kind of MOSFET pipe trigger circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |