CN216134615U - Lighting circuit and low-level lighting lamp - Google Patents

Abstract

The utility model discloses a lighting circuit, which comprises a charging circuit, a charging management circuit, a touch circuit, a main light source driving circuit, a built-in power supply and a main light source, wherein the charging management circuit is connected with the main light source driving circuit; the charging circuit is used for accessing an external power supply and providing output voltage for the charging management circuit; the charging management circuit is connected with the built-in power supply and used for charging the built-in power supply according to the output voltage of the charging circuit; the charging circuit and the built-in power supply are respectively connected with the main light source driving circuit and are used for supplying power to the main light source driving circuit; the touch circuit is connected with the main light source driving circuit and used for acquiring a switch touch signal and sending the switch touch signal to the main light source driving circuit; the main light source driving circuit is used for acquiring the charging state of the charging management circuit and performing on-off control on the main light source according to the charging state and the switch touch signal. The utility model also discloses a low-level illuminating lamp. The utility model can realize the effective regulation and control of the main light source, and has good stability and strong flexibility.

Description

Lighting circuit and low-level lighting lamp

Technical Field

The utility model relates to the technical field of illumination, in particular to an illumination circuit and a low-level illumination lamp.

Background

With the development of LED technology, it is found that LEDs are one of the best illumination light sources at present, and have the advantages of high brightness, long service life, and the like.

Currently, LEDs are widely used as light sources in the field of lighting lamps, such as table lamps. Accordingly, the existing lighting lamp is generally connected to an external power supply through a cable, and the cable is provided with a switch, so that when the lighting lamp needs to be turned on or off, the switch can be controlled to be turned on or off. However, the control method is single and has poor aesthetic property, and the actual requirements cannot be met.

SUMMERY OF THE UTILITY MODEL

The present invention also provides a lighting circuit and a low-level lighting lamp, which have a charging function, can effectively control a main light source, and have high flexibility and high stability.

In order to solve the technical problem, the utility model provides a lighting circuit, which comprises a charging circuit, a charging management circuit, a touch circuit, a main light source driving circuit, a built-in power supply and a main light source; the charging circuit is connected with the charging management circuit and is used for accessing an external power supply and providing output voltage for the charging management circuit; the charging management circuit is connected with the built-in power supply and used for charging the built-in power supply according to the output voltage of the charging circuit; the charging circuit and the built-in power supply are respectively connected with the main light source driving circuit, and both the charging circuit and the built-in power supply are used for supplying power to the main light source driving circuit; the touch circuit is connected with the main light source driving circuit and used for collecting a switch touch signal and sending the switch touch signal to the main light source driving circuit; the main light source driving circuit is respectively connected with the charging management circuit and the main light source and is used for acquiring the charging state of the charging management circuit and carrying out on-off control on the main light source according to the charging state and the switch touch signal.

As an improvement of the above scheme, the lighting circuit further includes an LCD display circuit connected to the main light source driving circuit, and the LCD display circuit is configured to collect a luminance touch signal and send the luminance touch signal to the main light source driving circuit, so that the main light source driving circuit performs luminance control on the main light source according to the luminance touch signal and performs display control on the LCD display circuit.

As an improvement of the above scheme, the LCD display circuit includes a segment code display circuit and a touch sensing circuit; the touch sensing circuit is connected with a main light source driving circuit and is used for acquiring a brightness touch signal and sending the brightness touch signal to the main light source driving circuit so that the main light source driving circuit can control the brightness of the main light source according to the brightness touch signal; the segment code display circuit is connected with a main light source driving circuit, and the main light source driving circuit performs switching and color control on the segment code display circuit according to the brightness touch signal.

As an improvement of the above scheme, the segment code display circuit includes a segment code screen and a backlight circuit, both of which are connected to a main light source driving circuit, so that the main light source driving circuit performs on-off control on the segment code screen and the backlight circuit according to the brightness touch signal; the backlight circuit comprises three groups of primary color circuits, each group of primary color circuit comprises a first MOS tube, a first resistor, a second resistor, a third resistor and a backlight diode, a grid electrode of the first MOS tube is connected with the main light source driving circuit through the first resistor, a source electrode of the first MOS tube is connected with the main light source driving circuit through the second resistor and is grounded, a drain electrode of the first MOS tube is connected with the backlight diode through the third resistor, and the main light source driving circuit performs on-off control on the primary color circuit according to the brightness touch signal and controls the color of the backlight circuit according to a preset color instruction.

As an improvement of the above scheme, the lighting circuit further includes a sensing circuit connected to the main light source driving circuit, and the sensing circuit is configured to collect displacement data of the lamp body and send the displacement data to the main light source driving circuit, so that the main light source driving circuit performs brightness, color temperature, and on-off control on the main light source according to the displacement data.

As an improvement of the above scheme, the sensing circuit includes an acceleration sensor, and the acceleration sensor is provided with a clock port and a data port and is connected to the main light source driving circuit through the clock port and the data port.

As an improvement of the above scheme, the charging circuit comprises a power supply access circuit, a voltage detection circuit, a charging indication circuit, a first voltage conversion circuit and a charging illumination circuit; the input end of the power supply access circuit is connected with an external power supply, and the output end of the power supply access circuit is connected with the voltage detection circuit, the charging indication circuit and the first voltage conversion circuit to supply power to the voltage detection circuit, the charging indication circuit and the first voltage conversion circuit; the voltage detection circuit comprises a second MOS tube, a first detection resistor, a second detection resistor, a third detection resistor, a detection capacitor, a detection resistor group and a charging port, wherein a grid electrode of the second MOS tube is connected with the charging illumination circuit through the first detection resistor, a source electrode of the second MOS tube is connected with the charging illumination circuit through the second detection resistor and is grounded, and a drain electrode of the second MOS tube is connected with the charging illumination circuit through the third detection resistor, is grounded through the third detection resistor and the detection capacitor, is grounded through the detection resistor group and is connected with the power supply access circuit through the charging port; the charging indicating circuit comprises a third MOS tube, a first indicating resistor, a second indicating resistor and an indicating lamp set, wherein the grid electrode of the third MOS tube is connected with the charging lighting circuit through the first indicating resistor, the source electrode of the third MOS tube is connected with the charging lighting circuit through the second indicating resistor and is grounded, the drain electrode of the third MOS tube is connected with the negative electrode of the indicating lamp set, and the positive electrode of the indicating lamp set is connected with the power supply access circuit; the first voltage conversion circuit is used for carrying out voltage reduction processing on the voltage output by the power supply access circuit, the input end of the first voltage conversion circuit is connected with the power supply access circuit, and the output end of the first voltage conversion circuit is connected with the charging illumination circuit to supply power for the charging illumination circuit; the charging illumination circuit is provided with a timing detection port, a voltage detection port, an indication information port and a power supply port, the charging illumination circuit is connected with the voltage detection circuit through the timing detection port to detect a charging voltage through the timing switch, is connected with the voltage detection circuit through the voltage detection port to detect the charging voltage, is connected with the charging indication circuit through the indication information port to control the on-off state of the charging indication circuit, and is connected with the first voltage conversion circuit through the power supply port.

As an improvement of the above scheme, the charging management circuit comprises a charging chip, a status indicator lamp, a regulating resistor, an overheat protection circuit, a battery matching circuit and a peripheral circuit; be equipped with external power source port, internal power source port, status port, adjustment port, temperature port, constant voltage charging port and battery on the chip that charges and set up the port, the chip that charges passes through external power source port with charging circuit connects, through internal power source port with built-in power supply connects, through status port with status indicator connects, is connected with adjusting resistance through adjusting the port, through the temperature port with overheat protection circuit connects, through constant voltage charging port and battery set up the port with battery matching circuit connects.

As an improvement of the above scheme, the main light source driving circuit includes a main control chip, a light source driving circuit, a second voltage conversion circuit, and a third voltage conversion circuit; the light source driving circuit is respectively connected with the charging circuit and the built-in power supply, when the charging circuit is started, the light source driving circuit supplies power through the charging circuit, when the charging circuit is closed, the light source driving circuit supplies power through the built-in power supply, and the light source driving circuit is also connected with the main light source to drive the main light source; the main control chip is provided with an enabling port and a light source driving port, is connected with the enabling end of the second voltage conversion circuit through the enabling port to control the second voltage conversion circuit, and is connected with the light source driving circuit through the light source driving port to control the light source driving circuit to drive the main light source; the second voltage conversion circuit is used for carrying out voltage reduction processing on the voltage output by the built-in power supply, the input end of the second voltage conversion circuit is connected with the built-in power supply, and the output end of the second voltage conversion circuit is connected with the main control chip and the touch circuit to supply power for the main control chip and the touch circuit; the third voltage conversion circuit is used for carrying out voltage reduction processing on the voltage output by the built-in power supply, the input end of the third voltage conversion circuit is connected with the built-in power supply, and the output end of the third voltage conversion circuit is connected with the main control chip to supply power for the main control chip.

Correspondingly, the utility model also provides a low-position illuminating lamp which comprises a lamp body and the illuminating circuit, wherein the illuminating circuit is packaged in the lamp body.

The implementation of the utility model has the following beneficial effects:

according to the utility model, the charging circuit, the charging management circuit, the touch circuit and the main light source driving circuit are combined, so that a low-level illuminating lamp with a charging function can be formed, the safety is high, and stable illumination can be realized;

the utility model also adds an LCD display circuit on the lighting circuit, combines the segment code screen technology to realize the brightness adjustment of the main light source, and can also make the segment code screen display different colors by changing the backlight color to match the application of different shell colors, thus having strong flexibility;

the utility model also adds a sensing circuit on the lighting circuit to realize the control of the switch, brightness and color temperature of the main light source, and the operation is flexible.

Drawings

FIG. 1 is a schematic structural diagram of a lighting circuit in a low-level lighting lamp according to a first embodiment of the present invention;

FIG. 2 is a circuit diagram of a power supply connection circuit in the low-level illumination lamp according to the present invention;

FIG. 3 is a circuit diagram of a voltage detection circuit in the low-level illumination lamp according to the present invention;

FIG. 4 is a circuit diagram of a charge indicating circuit in the low-level illumination lamp according to the present invention;

FIG. 5 is a circuit diagram of a first voltage conversion circuit in the low-level illumination lamp according to the present invention;

FIG. 6 is a circuit diagram of a charging lighting circuit in the low-level illumination lamp according to the present invention;

FIG. 7 is a circuit diagram of a charge management circuit in the low-end light of the present invention;

FIG. 8 is a circuit diagram of a light source driving circuit in the low-level illumination lamp according to the present invention;

FIG. 9 is a circuit diagram of a main control chip of the low-level lighting lamp according to the present invention;

FIG. 10 is a circuit diagram of a second voltage conversion circuit in the low-level illumination lamp according to the present invention;

FIG. 11 is a circuit diagram of a third voltage conversion circuit in the low-level illumination lamp according to the present invention;

FIG. 12 is a circuit diagram of a signal acquisition circuit in the low-level illumination lamp according to the present invention;

FIG. 13 is a circuit diagram of an interface circuit in the low-end light of the present invention;

FIG. 14 is a schematic structural diagram of a lighting circuit in the low-level illumination lamp according to a second embodiment of the present invention;

FIG. 15 is a circuit diagram of a touch sensing circuit in the low-end light of the present invention;

FIG. 16 is a circuit diagram of a backlight circuit in the low-level illumination lamp according to the present invention;

FIG. 17 is a circuit diagram of the primary color circuit in the low-level illumination lamp according to the present invention;

FIG. 18 is another circuit diagram of the primary color circuit in the low-level illumination lamp according to the present invention;

FIG. 19 is a circuit diagram of a sensing circuit in the low-end lamp of the present invention;

fig. 20 is a schematic structural view of the low-level illumination lamp of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 shows a structure diagram of a lighting circuit 2 in a low-level lighting lamp according to a first embodiment of the present invention, which includes a charging circuit 201, a charging management circuit 202, a touch circuit 203, a main light source driving circuit 204, a built-in power supply 3, and a main light source 4. Specifically, the method comprises the following steps:

the charging circuit 201 is connected with the charging management circuit 202 and is used for accessing an external power supply and providing an output voltage for the charging management circuit 202;

the charging management circuit 202 is connected to the internal power supply 3, and is configured to charge the internal power supply 3 according to the output voltage of the charging circuit 201;

the charging circuit 201 and the built-in power supply 3 are respectively connected with the main light source driving circuit 204, and both the charging circuit 201 and the built-in power supply 3 are used for supplying power to the main light source driving circuit 204;

the touch circuit 203 is connected with the main light source driving circuit 204 and is used for acquiring a switch touch signal and sending the switch touch signal to the main light source driving circuit 204;

the main light source driving circuit 204 is connected to the charging management circuit 202 and the main light source 4, and is configured to collect a charging state of the charging management circuit 202 and perform on-off control on the main light source 4 according to the charging state and the switch touch signal.

When the low-level illuminating lamp needs to be charged, the low-level illuminating lamp can be arranged in the charging base, an external power supply is connected through the charging circuit 201, the charging control is carried out on the internal power supply through the charging management circuit 202, and at the moment, the light source driving circuit and the main light source 4 are both powered by the external power supply; when the low-position illuminating lamp does not need to be charged, the low-position illuminating lamp can be removed from the charging base, and the internal power supply supplies power to the light source driving circuit and the main light source 4; meanwhile, the main light source driving circuit 204 performs on-off control on the main light source 4 according to the on-off touch signal acquired by the touch circuit 203, and the operation is convenient and simple.

The lighting circuit 2 is described in further detail below with reference to specific circuit diagrams:

first, charging circuit 201

As shown in fig. 2 to 6, the charging circuit 201 includes a power access circuit, a voltage detection circuit, a charging indication circuit, a first voltage conversion circuit, and a charging illumination circuit. The power supply access circuit is used for accessing an external power supply so as to supply power for the voltage detection circuit, the charging indication circuit and the first voltage conversion circuit; the first voltage conversion circuit is used for carrying out voltage reduction processing on the voltage output by the power supply access circuit so as to supply power for the charging illumination circuit; the charging lighting circuit drives the voltage detection circuit to detect the charging voltage at regular time, determines the charging state according to the charging voltage fed back by the voltage detection circuit, and drives the charging indication circuit according to the charging state, so that the indication of the charging state is realized. Specifically, the method comprises the following steps:

as shown in fig. 2, the power access circuit includes an input terminal DC1, an output terminal DC, and a bidirectional zener diode TVS 2; the input end DC1 of the power supply access circuit is connected with an external power supply, and the output end DC of the power supply access circuit is grounded through a voltage stabilizing diode TVS2 and is connected with the voltage detection circuit, the charging indication circuit and the first voltage conversion circuit, so that the voltage detection circuit, the charging indication circuit and the first voltage conversion circuit are stably powered.

As shown in fig. 3, the voltage detection circuit includes a second MOS transistor Q6, a first detection resistor R49, a second detection resistor R52, a third detection resistor R48, a detection capacitor C28, a detection resistor group and a charging port P7, where the detection resistor group includes at least two detection resistors (R50, R51) connected in parallel; the grid electrode of the second MOS tube Q6 is connected with the charging illumination circuit through a first detection resistor R49; the source electrode of the second MOS tube is connected with the charging illumination circuit through a second detection resistor R52 and is grounded; the drain of the second MOS transistor Q6 is connected to the charging illumination circuit through a third detection resistor R48, to the ground through a third detection resistor R48 and a detection capacitor C28, to the ground through a detection resistor group, and to the power supply access circuit through a charging port P7.

As shown in fig. 4, the charging indication circuit includes a third MOS transistor Q7, a first indication resistor R57, a second indication resistor R58, and an indication lamp set, where the indication lamp set includes at least one group of indication lamp units, and each group of indication lamp units includes indication resistors (LED3, LED7, LED11 or LED4, LED8, LED12 or LED5, LED9, LED13 or LED6, LED10, LED14) and at least one light emitting diode (R53 or R54 or R55 or R56) connected in series in sequence; the grid electrode of the third MOS tube Q7 is connected with the charging illumination circuit through the first indicating resistor R57, the source electrode of the third MOS tube Q7 is connected with the charging illumination circuit through the second indicating resistor R58 and is grounded, the drain electrode of the third MOS tube Q7 is connected with the negative electrode of the indicator lamp group, and the positive electrode of the indicator lamp group is connected with the power supply access circuit.

As shown in fig. 5, the first voltage converting circuit includes a first converting chip U6, a converting diode D2, a first converting capacitor C31 and a second converting capacitor C29; the input end IN of the first conversion chip U6 is connected with the power supply access circuit through a conversion diode D2 and is grounded through a first conversion capacitor C31; the output end OUT of the first conversion chip U6 is connected with the charging and lighting circuit to supply power for the charging and lighting circuit, and is grounded through a second conversion capacitor C29; the ground terminal GND of the first conversion chip U6 is grounded. In this embodiment, the first conversion chip U6 can convert the incoming 15V voltage into 5V voltage, thereby supplying power to the rechargeable lighting circuit.

As shown in fig. 6, the charging lighting circuit includes a charging control chip U7, and the charging control chip U7 is provided with a timing detection port ADC _ DC, a voltage detection port DC _ TS, an indication information port PWM _ G, and a power supply port VDD; the charging illumination circuit is connected with the voltage detection circuit through the timing detection port ADC _ DC to switch the charging voltage detection function at a timing, is connected with the voltage detection circuit through the voltage detection port DC _ TS to detect the charging voltage, is connected with the charging indication circuit through the indication information port PWM _ G to control the on-off state of the charging indication circuit, and is connected with the first voltage conversion circuit through the power supply port VDD.

When the voltage detection circuit works, an external power supply is connected through the input end DC1 of the power supply connection circuit, so that power is supplied to the charging port P7 of the voltage detection circuit, the charging indication circuit and the first voltage conversion circuit; the voltage detection port DC _ TS of the charging control chip U7 is used to detect the charging voltage (detected by the detection resistor group of the voltage detection circuit), so as to determine the current charging state from the detected charging voltage; meanwhile, the charging control chip U7 outputs a control signal through the indication information port PWM _ G according to the current charging state to control the on-off state of the third MOS tube Q7 in the charging indication circuit, so as to control the on-off state of the indicator lamp set to indicate the current charging state (for example, in the charging process, the indicator lamp set is on; the charging control chip U7 can also send a control signal to the second MOS transistor Q6 of the voltage detection circuit through the voltage detection port DC _ TS at regular time to shield the detection of the detection resistor set, and accordingly, the timing switch voltage detection port DC _ TS can effectively reduce the loss of the detection resistor set during charging.

Therefore, an external power adapter can be accessed through the charging circuit 201 to obtain power, charge the built-in power supply 3 built in the lamp body 1, and detect the charging state through the voltage detection circuit and indicate the current charging state through the indicating lamp set in the charging circuit 201.

Second, the charge management circuit 202

As shown in fig. 7, the charging management circuit 202 includes a charging chip U4, a status indicator light LED1, a regulating resistor R28, an overheat protection circuit, a battery matching circuit, and peripheral circuits; the charging chip U4 is provided with an external power supply port IN, an internal power supply port LX, a state port STAT, an adjusting port ILIM, a temperature port NTC, a constant-voltage charging port CV and a battery setting port CELL; an external power supply port IN of the charging chip U4 is connected with the charging circuit 201, an internal power supply port LX is connected with the built-IN power supply 3, a status port STAT is connected with a status indicator light LED1, an adjusting port ILIM is grounded through an adjusting resistor R28, a temperature port NTC is connected with an overheating protection circuit, and a constant-voltage charging port CV and a battery setting port CELL are connected with a battery matching circuit.

In operation, the charging circuit 201 provides a voltage VIN to the charging management circuit 202 through the charging port P7, so as to supply power to the charging chip U4; the charging chip U4 converts the voltage supplied from the charging circuit 201 into a voltage suitable for the battery, thereby charging the built-in power supply 3 built in the lamp body 1.

Further, the anode of the status indicator light LED1 is connected to the power supply port VDD of the charging control chip U7 in the charging circuit 201 through the resistor R25, and the cathode is connected to the status port STAT of the charging chip U4, so as to indicate the charging status; one end of the regulating resistor R28 is grounded, and the other end of the regulating resistor R28 is connected with a regulating port ILIM of the charging chip U4, so that the regulation of the charging current is realized; the overheating protection circuit comprises a first protection resistor R27 and a second protection resistor R29, one end of the first protection resistor R27 is connected with the NTC of the temperature port of the charging chip U4, the other end of the first protection resistor R27 is connected with the VDD of the power supply port of the charging control chip U7 in the charging circuit 201, one end of the second protection resistor R29 is connected with the NTC of the temperature port of the charging chip U4, and the other end of the second protection resistor R29 is grounded, so that the charging overheating protection of an internal power supply can be realized; the battery matching circuit comprises a first constant voltage resistor R31, a second constant voltage resistor R30 and a setting resistor R32, wherein one end of the first constant voltage resistor R31 is connected with a constant voltage charging port CV of a charging chip U4, the other end of the first constant voltage resistor R31 is connected with a power supply port VDD of a charging control chip U7 in the charging circuit 201, one end of the second constant voltage resistor R30 is connected with a constant voltage charging port CV of the charging chip U4, the other end of the second constant voltage resistor R30 is grounded, one end of the setting resistor R32 is connected with a battery setting port CELL of the charging chip U4, and the other end of the setting resistor R32 is grounded, wherein the internal power supplies of different models can be matched through the states of the constant voltage charging port CV and the battery setting port CELL. Accordingly, the internal power supply port LX of the charge management circuit 202 is connected to the internal power supply 3 through the first inductor L2 and the resistor R19 connected in series.

Therefore, the charging management circuit 202 can realize effective charging and state management of the internal power supply 3, and safety is high.

Three, main light source driving circuit 204

As shown in fig. 8 to 11, the main light source driving circuit 204 includes a main control chip U1, a light source driving circuit, a second voltage converting circuit and a third voltage converting circuit. Specifically, the method comprises the following steps:

as shown in fig. 8, the light source driving circuit is respectively connected to the charging circuit 201 and the built-in power supply 3, when the charging circuit 201 is started, the light source driving circuit supplies power through the charging circuit 201, when the charging circuit 201 is closed, the light source driving circuit supplies power through the built-in power supply 3, and the light source driving circuit is further connected to the main light source 4 to drive the main light source 4.

The charging circuit 201 is connected to the light source driving circuit and the main light source 4 through the voltage VIN (i.e., external power) supplied from the charging port P7 to the light source driving circuit and the voltage BAT + supplied from the internal power supply 3, so as to supply voltage to the light source driving circuit and the main light source 4. In the course of the work, light source drive circuit and main light source 4 select the bigger one of voltage to supply power in external power source and built-in power supply 3, and when practical application, because external power source's voltage VIN is greater than built-in power supply 3's voltage BAT +, consequently when lamp body 1 places in charging base, can prefer the external power source who chooses for use to insert for light source drive circuit and main light source 4 power supply, and when taking out lamp body 1 from charging base, adopt lamp body 1's built-in power supply 3 power supply, this makes seamless switching when switching power supply supplies power, the phenomenon of scintillation can not appear in main light source 4, can reduce the rate of utilization of internal power supply again, prolong the internal power supply life-span.

Further, the light source driving circuit comprises a constant current driving chip U5, a signal port EN/PWM is arranged on the constant current driving chip U5, and the signal port EN/PWM is connected with the main control chip U1 to receive a control signal sent by the main control chip U1, so that the control of the main light source 4 is realized.

As shown in fig. 9, the main control chip U1 is provided with an enable port EN _ S and a light source driving port PWM _ DIM, and the main control chip U1 is connected to the enable port EN of the second voltage conversion circuit through the enable port EN _ S to control the second voltage conversion circuit, and is connected to the light source driving circuit through the light source driving port PWM _ DIM to control the light source driving circuit to drive the main light source 4.

When the main control chip U1 works, the main control chip U1 sends a control signal to the signal port EN/PWM of the constant current driving chip through the light source driving port PWM _ DIM, and the constant current driving chip U5 adjusts output current according to the PWM duty ratio of the control signal, so that the dimming of the main light source 4 is realized.

Further, the main control chip U1 also picks up the voltage of the internal power supply 3 through the ADC function, and when the voltage of the internal power supply 3 drops to the lower limit voltage, the entire lamp enters the deep sleep mode, so as to protect the internal power supply 3 from over-discharge damage and can be normally used after charging. In addition, the main control chip U1 is further provided with a charge status port STAT _ BAT, and the charge status port STAT _ BAT is connectable to a status port STAT of the charge chip U4 in the charge management circuit 202, so as to obtain a charge status. In addition, a switch port POW _ SW is further arranged on the main control chip U1, the switch port POW _ SW can be connected with a main switch to control the whole lamp to be turned on and turned off, wherein in the process of producing and transporting the lamp, the whole lamp can be controlled to enter a deep sleep mode through the main switch, and therefore the lamp is prevented from being turned on by being triggered by a touch element in error.

As shown in fig. 10, the second voltage conversion circuit is configured to step down the voltage BAT + output by the internal power supply 3, an input end of the second voltage conversion circuit is connected to the internal power supply 3, and an output end of the second voltage conversion circuit is connected to the main control chip U1 and the touch circuit 203 to supply power to the main control chip U1 and the touch circuit 203. Specifically, the second voltage conversion circuit includes a second conversion chip U3, a fifth conversion capacitor C8, a sixth conversion capacitor C7, a seventh conversion capacitor C4, an eighth conversion capacitor C5, a ninth conversion capacitor C6, a second inductor L1, a first conversion resistor R3, and a second conversion resistor R4; an input end V1 of the second conversion chip U3 is connected with the built-in power supply 3 and is grounded through a fifth conversion capacitor C8; the enable end EN of the second conversion chip U3 is connected with the enable port EN _ S of the main control chip U1; the ground terminal GN of the second conversion chip U3 is grounded; the control end SW of the second conversion chip U3 is connected to the self-boosting end BS of the second conversion chip U3 through a sixth conversion capacitor C7, the control end SW of the second conversion chip U3 is further connected to one end of a first conversion resistor R3, one end of a seventh conversion capacitor C4, one end of an eighth conversion capacitor C5 and one end of a ninth conversion capacitor C6 through a second inductor L1, the other ends of the first conversion resistor R3 and the seventh conversion capacitor C4 are connected to the feedback end FB of the second conversion chip U3 and grounded through the second conversion resistor R4, and the other ends of the eighth conversion capacitor C5 and the ninth conversion capacitor C6 are grounded.

It should be noted that the enable port EN _ S of the main control chip U1 is connected to the enable port EN of the second conversion chip U3, so that the output of the second conversion chip U3 can be controlled by sending a control signal to the second conversion chip U3 through the main control chip U1, and therefore, when the main control chip U3 is not used, the power supply of other devices is stopped, and the power saving effect is achieved.

As shown in fig. 11, the third voltage conversion circuit is used for performing voltage reduction processing on the voltage BAT + output by the built-in power supply 3, and includes a third conversion chip U2, a third conversion capacitor C1, and a fourth conversion capacitor C3. Specifically, an input end IN of the third conversion chip U2 is connected to the internal power supply 3 and is grounded through the third conversion capacitor C1, an output end OUT of the third conversion chip U2 is grounded through the fourth conversion capacitor C3 and is connected to the main control chip U1 to supply power to the main control chip U1, and a ground end of the third conversion chip U2 is grounded.

By combining the second voltage conversion circuit and the third voltage conversion circuit, the voltage BAT + provided by the internal power supply 3 is converted by the second conversion chip U3 and the third conversion chip U2, respectively, and then supplies power to the main control chip U1, the touch circuit 203, and other power sources.

Four, touch circuit 203

As shown in fig. 12 and 13, the touch circuit 203 includes a signal acquisition circuit, an interface circuit, and a plurality of LED lamps.

It should be noted that, the LED lamp is used to illuminate the marker (e.g., LOGO) disposed on the top of the lamp body 1, and the LED lamp can be set according to actual conditions, so that the flexibility is strong. Specifically, the second voltage conversion circuit in the light source driving circuit can convert the voltage output by the built-in power supply 3 into 3.3V voltage, and then supply power to the LED lamp.

As shown in fig. 12, the signal collecting circuit includes a touch terminal P9 and a touch element TP2, and the touch element TP2 is connected to the touch terminal P9 and disposed at the top of the lamp body 1 for receiving a switch touch signal of a user.

As shown in fig. 13, the interface circuit includes an interface connection terminal P6, and the interface circuit is connected with the touch port TK1 of the main control chip U1 in the main light source driving circuit 204 through the interface connection terminal P6.

It should be noted that a touch port TK1 interfacing with the interface circuit may be further provided in the main control chip U1. During operation, the touch element TP2 collects a switch touch signal and sends the switch touch signal to the main control chip U1 through the touch connecting terminal P9, the interface connecting terminal P6 and the touch port TK1 of the main control chip U1 in sequence, and the main control chip U1 controls the on and off of the main light source 4 according to the switch touch signal.

Referring to fig. 14, fig. 14 shows a structure diagram of a second embodiment of the illumination circuit 2 in the low-position illumination lamp according to the present invention, and unlike the first embodiment shown in fig. 1, the illumination circuit 2 in this embodiment further includes an LCD display circuit 205 and a sensing circuit 206. In practical applications, the LCD display circuit 205, the sensing circuit 206, or both the LCD display circuit 205 and the sensing circuit 206 may be separately disposed according to actual situations, which is not limited herein.

The LCD display circuit 205 and the sensing circuit 206 are described below with reference to specific circuits:

LCD display circuit 205

As shown in fig. 15 to 18, the LCD display circuit 205 is configured to collect a luminance touch signal and send the luminance touch signal to the main light source driving circuit 204, so that the main light source driving circuit 204 performs luminance control on the main light source 4 according to the luminance touch signal and performs display control on the LCD display circuit 205.

Specifically, the LCD display circuit 205 includes a segment code display circuit and a touch sensing circuit disposed on an outer surface of the segment code display circuit. The touch sensing circuit is connected to the main light source driving circuit 204, and the touch sensing circuit is configured to collect a luminance touch signal and send the luminance touch signal to the main light source driving circuit 204, so that the main light source driving circuit 204 performs luminance control on the main light source 4 according to the luminance touch signal.

Meanwhile, the segment code display circuit is connected to the main light source driving circuit 204, and the main light source driving circuit 204 performs switching and color control on the segment code display circuit according to the luminance touch signal.

As shown in fig. 15, the touch sensing circuit includes a sliding touch screen TP1, and the sliding touch screen TP1 is connected to sliding touch ports (RST _ TP, INT _ TP) of the main control chip U1 in the main light source driving circuit 204. It should be noted that the LCD display circuit 205 is disposed on the sidewall of the lamp body 1, and a user can directly touch the sliding touch screen TP1 of the segment code display circuit to control the main light source 4.

As shown in fig. 16 to 18, the segment code display circuit includes a segment code screen (see fig. 16) and a backlight circuit (see fig. 17 to 8), and both the segment code screen and the backlight circuit are connected to the main light source driving circuit 204, so that the main light source driving circuit 204 performs on-off control on the segment code screen and the backlight circuit according to the luminance touch signal. The segment code screen comprises a first port (S1-S8) and a second port (COM1-COM4), and the first port and the second port of the segment code screen are respectively connected with corresponding display output ports (S1-S8 and COM1-COM4) of the main control chip U1; the backlight circuit comprises three groups of primary color circuits (see fig. 17 and 18), each group of primary color circuits comprises a first MOS transistor (Q1 or Q2 or Q3), a first resistor (R8 or R8), a second resistor (R8 or R8), a third resistor (R8 or R8), and a backlight diode (LCD 18), the gate of the first MOS transistor (Q8 or Q8) is connected to the primary light source driving circuit 204 through the first resistor (R8 or R8), the source of the first MOS transistor (Q8 or Q8) is connected to the primary light source driving circuit 204 and grounded through the second resistor (R8 or R8), the drain of the first MOS transistor (Q8 or Q8) is connected to the primary light source driving circuit 204 through the third resistor (R8 or R8), and the backlight diode (LCD) is connected to the backlight source driving circuit 204 and the color control circuit adjusts the backlight diode according to a preset color control instruction. It should be noted that, a preset color command is stored in the main chip U1 in advance, and the color command may be set according to the color of the lamp housing in advance; in addition, the backlight circuit is arranged on the back of the segment code screen, and the color displayed by the segment code screen is adjusted by adjusting the color of the backlight circuit.

It should be noted that the second voltage conversion circuit in the light source driving circuit can convert the voltage output by the built-in power supply 3 into 3.3V voltage, and then supply power to the backlight diode (LCD1B) in the backlight circuit.

During operation, the sliding touch screen TP1 transmits the received brightness touch signal to the main control chip U1, on one hand, the main control chip U1 sends a corresponding control signal to the constant current driving chip U5 through the light source driving port PWM _ DIM according to the brightness touch signal, thereby adjusting the brightness of the main light source 4; on the other hand, the main control chip U1 outputs corresponding control signals to the segment code screen and the backlight circuit according to the brightness touch signal, so that the segment code display circuit displays corresponding brightness indication information. For example, there are 24 segments of display cells in the segment code display circuit, where when only the display cell at the bottom is lit, the lowest brightness of the main light source 4 is represented, and the lit display cells are sequentially increased from the bottom to the top, indicating that the brightness is sequentially increased. Specifically, the main control chip U1 is further provided with an R primary color port PWM _ R, G primary color port PWM _ G, B primary color port PWM _ B and a display output port (S1-S8 and COM1-COM4), and the process of the main control chip U1 controlling the segment code display circuit is as follows:

after receiving the brightness touch signal, the main control chip U1 outputs corresponding control signals to the first MOS transistors (Q1, Q2 and Q3) through the R primary color port PWM _ R, G primary color port PWM _ G, B primary color port PWM _ B, respectively, to control on/off of the first MOS transistors (Q1, Q2 and Q3), thereby controlling on/off of the backlight diodes (LCD1B) in the backlight circuit, and realizing different color display; meanwhile, the main control chip U1 outputs corresponding control signals to the segment code screen through the display output ports (S1-S8 and COM1-COM4), determines the display grids needing to be lightened, and is matched with the backlight diode (LCD1B) to lighten the corresponding display grids of the segment code screen, so that the segment code display circuit displays corresponding brightness indication information.

In this embodiment, the segment code display circuit uses 4 × 6 segment driving through the LED display driving inside the main control chip U1, and the frame frequency is about 64Hz, although this embodiment is not limited thereto.

Second, the sensing circuit 206

As shown in fig. 19, the sensing circuit 206 is configured to collect displacement data of the lamp body 1 and send the displacement data to the main light source driving circuit 204, so that the main light source driving circuit 204 performs brightness, color temperature and on-off control on the main light source 4 according to the displacement data. Specifically, the sensing circuit 206 includes an acceleration sensor U8, and the acceleration sensor U8 is provided with a clock port SCLK/SCL and a data port SDI/SDA, and is connected to the main light source driving circuit 204 through the clock port SCLK/SCL and the data port SDI/SDA.

The third voltage conversion circuit in the light source driving circuit may convert the voltage output by the built-in power supply 3 into a 3V voltage, and then supply power to the acceleration sensor U8.

When the light source dimming controller works, the acceleration sensor U8 is communicated with the main control chip U1 through the IIC interface, and the main control chip U1 outputs the collected displacement data of the acceleration sensor U8 to the light source driving circuit through calculation to achieve the dimming function. Specifically, the method comprises the following steps: the acceleration sensor U8 collects displacement data and sends the displacement data to the ports SCL _ TI and SDA _ TP of the main control chip U1 through the clock port SCLK/SCL and the data port SDI/SDA, so that the main control chip U1 sends a corresponding control signal to the light source driving circuit through the light source driving port PWM _ DIM according to the displacement data, thereby adjusting the main light source 4. For example, the acceleration sensor U8 collects displacement data generated by the whole lamp and the table top in XYZ axes, and the main control chip U1 controls the brightness of the main light source 4 according to the collected displacement data in the X axis, controls the color temperature of the main light source 4 according to the displacement data in the Y axis, and controls the on/off of the main light source 4 according to the displacement data in the Z axis. Preferably, the acceleration sensor U8 may be a gyroscope, but not limited thereto, as long as the moving position and the rotating motion of the object can be accurately tracked, and the flexibility is strong.

From the above, the low-level lighting lamp of the present invention can control the main light source 4 by three control modes: (1) the switching control of the main light source 4 is realized through the touch circuit 203; (2) the switching and brightness control of the main light source 4 is realized through the LCD display circuit 205; (3) the switching, brightness and color temperature control of the main light source 4 is realized by the sensing circuit 206.

As shown in fig. 20, the present invention further discloses a low-level lighting lamp, which includes a lamp body 1 and the lighting circuit 2, wherein the lighting circuit 2 is packaged in the lamp body 1.

In summary, the charging circuit 201, the charging management circuit 202, the touch circuit 203 and the main light source driving circuit 204 are combined to form a low-level illuminating lamp with a charging function, so that the safety is high, and stable illumination can be realized; further, the utility model also adds LCD display circuit 205 on the lighting circuit 2, combines segment code screen technology, realizes the brightness adjustment of the main light source 4, and can also make the segment code screen display different colors by changing the backlight color to match the application of different shell colors, the flexibility is strong; in addition, the present invention also adds a sensing circuit 206 on the lighting circuit 2 to realize the control of the switch, brightness and color temperature of the main light source 4, and the operation is flexible.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.

Claims (10)

1. A lighting circuit is characterized by comprising a charging circuit, a charging management circuit, a touch circuit, a main light source driving circuit, a built-in power supply and a main light source;

the charging circuit is connected with the charging management circuit and is used for accessing an external power supply and providing output voltage for the charging management circuit;

the charging management circuit is connected with the built-in power supply and used for charging the built-in power supply according to the output voltage of the charging circuit;

the charging circuit and the built-in power supply are respectively connected with the main light source driving circuit, and both the charging circuit and the built-in power supply are used for supplying power to the main light source driving circuit;

the touch circuit is connected with the main light source driving circuit and used for collecting a switch touch signal and sending the switch touch signal to the main light source driving circuit;

the main light source driving circuit is respectively connected with the charging management circuit and the main light source and is used for acquiring the charging state of the charging management circuit and carrying out on-off control on the main light source according to the charging state and the switch touch signal.

2. The illumination circuit according to claim 1, further comprising an LCD display circuit connected to the main light source driving circuit, wherein the LCD display circuit is configured to collect a luminance touch signal and send the luminance touch signal to the main light source driving circuit, so that the main light source driving circuit performs luminance control on the main light source according to the luminance touch signal and performs display control on the LCD display circuit.

3. The illumination circuit of claim 2, wherein the LCD display circuit comprises a segment code display circuit and a touch sensing circuit;

the touch sensing circuit is connected with a main light source driving circuit and is used for acquiring a brightness touch signal and sending the brightness touch signal to the main light source driving circuit so that the main light source driving circuit can control the brightness of the main light source according to the brightness touch signal;

the segment code display circuit is connected with a main light source driving circuit, and the main light source driving circuit performs switching and color control on the segment code display circuit according to the brightness touch signal.

4. The illumination circuit of claim 3, wherein the segment code display circuit comprises a segment code screen and a backlight circuit, and the segment code screen and the backlight circuit are both connected with a main light source driving circuit, so that the main light source driving circuit performs on-off control on the segment code screen and the backlight circuit according to the brightness touch signal;

each backlight circuit comprises three groups of primary color circuits, each group of primary color circuit comprises a first MOS tube, a first resistor, a second resistor, a third resistor and a backlight diode, a grid electrode of the first MOS tube is connected with the main light source driving circuit through the first resistor, a source electrode of the first MOS tube is connected with the main light source driving circuit through the second resistor and is grounded, a drain electrode of the first MOS tube is connected with the backlight diode through the third resistor, and the main light source driving circuit performs on-off control on the primary color circuits according to the brightness touch signals and controls the color of the backlight circuit according to preset color instructions.

5. The lighting circuit of claim 1, further comprising a sensing circuit connected to the main light source driving circuit, wherein the sensing circuit is configured to collect displacement data of the lamp body and send the displacement data to the main light source driving circuit, so that the main light source driving circuit performs brightness, color temperature, and on-off control on the main light source according to the displacement data.

6. The lighting circuit according to claim 5, wherein the sensing circuit comprises an acceleration sensor, and the acceleration sensor is provided with a clock port and a data port and is connected with the main light source driving circuit through the clock port and the data port.

7. The lighting circuit of claim 1, wherein the charging circuit comprises a power access circuit, a voltage detection circuit, a charge indication circuit, a first voltage conversion circuit, and a charging lighting circuit;

the input end of the power supply access circuit is connected with an external power supply, and the output end of the power supply access circuit is connected with the voltage detection circuit, the charging indication circuit and the first voltage conversion circuit to supply power to the voltage detection circuit, the charging indication circuit and the first voltage conversion circuit;

the voltage detection circuit comprises a second MOS tube, a first detection resistor, a second detection resistor, a third detection resistor, a detection capacitor, a detection resistor group and a charging port, wherein a grid electrode of the second MOS tube is connected with the charging illumination circuit through the first detection resistor, a source electrode of the second MOS tube is connected with the charging illumination circuit through the second detection resistor and is grounded, and a drain electrode of the second MOS tube is connected with the charging illumination circuit through the third detection resistor, is grounded through the third detection resistor and the detection capacitor, is grounded through the detection resistor group and is connected with the power supply access circuit through the charging port;

the charging indicating circuit comprises a third MOS tube, a first indicating resistor, a second indicating resistor and an indicating lamp set, wherein the grid electrode of the third MOS tube is connected with the charging lighting circuit through the first indicating resistor, the source electrode of the third MOS tube is connected with the charging lighting circuit through the second indicating resistor and is grounded, the drain electrode of the third MOS tube is connected with the negative electrode of the indicating lamp set, and the positive electrode of the indicating lamp set is connected with the power supply access circuit;

the first voltage conversion circuit is used for carrying out voltage reduction processing on the voltage output by the power supply access circuit, the input end of the first voltage conversion circuit is connected with the power supply access circuit, and the output end of the first voltage conversion circuit is connected with the charging illumination circuit to supply power for the charging illumination circuit;

the charging illumination circuit is provided with a timing detection port, a voltage detection port, an indication information port and a power supply port, the charging illumination circuit is connected with the voltage detection circuit through the timing detection port to detect a charging voltage through the timing switch, is connected with the voltage detection circuit through the voltage detection port to detect the charging voltage, is connected with the charging indication circuit through the indication information port to control the on-off state of the charging indication circuit, and is connected with the first voltage conversion circuit through the power supply port.

8. The lighting circuit of claim 1, wherein the charge management circuit comprises a charging chip, a status indicator light, a regulating resistor, an over-temperature protection circuit, a battery matching circuit, and peripheral circuitry;

be equipped with external power source port, internal power source port, status port, adjustment port, temperature port, constant voltage charging port and battery on the chip that charges and set up the port, the chip that charges passes through external power source port with charging circuit connects, through internal power source port with built-in power supply connects, through status port with status indicator connects, is connected with adjusting resistance through adjusting the port, through the temperature port with overheat protection circuit connects, through constant voltage charging port and battery set up the port with battery matching circuit connects.

9. The lighting circuit of claim 1, wherein the main light source driving circuit comprises a main control chip, a light source driving circuit, a second voltage conversion circuit and a third voltage conversion circuit;

the light source driving circuit is respectively connected with the charging circuit and the built-in power supply, when the charging circuit is started, the light source driving circuit supplies power through the charging circuit, when the charging circuit is closed, the light source driving circuit supplies power through the built-in power supply, and the light source driving circuit is also connected with the main light source to drive the main light source;

the main control chip is provided with an enabling port and a light source driving port, is connected with the enabling end of the second voltage conversion circuit through the enabling port to control the second voltage conversion circuit, and is connected with the light source driving circuit through the light source driving port to control the light source driving circuit to drive the main light source;

the second voltage conversion circuit is used for carrying out voltage reduction processing on the voltage output by the built-in power supply, the input end of the second voltage conversion circuit is connected with the built-in power supply, and the output end of the second voltage conversion circuit is connected with the main control chip and the touch circuit to supply power for the main control chip and the touch circuit;

the third voltage conversion circuit is used for carrying out voltage reduction processing on the voltage output by the built-in power supply, the input end of the third voltage conversion circuit is connected with the built-in power supply, and the output end of the third voltage conversion circuit is connected with the main control chip to supply power for the main control chip.

10. A low-level lighting lamp, comprising a lamp body and the lighting circuit of any one of claims 1 to 9, wherein the lighting circuit is packaged in the lamp body.

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