CN211297028U

CN211297028U - Interior lamp control circuit and interior lamp

Info

Publication number: CN211297028U
Application number: CN201922433785.2U
Authority: CN
Inventors: 杨啸; 王剑华
Original assignee: East Automotive Electronic Co ltd
Current assignee: East Automotive Electronic Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-08-18
Anticipated expiration: 2029-12-30

Abstract

The utility model provides an interior lamp control circuit and interior lamp, its circuit includes: the power supply output end of the interface circuit is connected with the power supply input end of the power supply circuit; the power output end of the power circuit outputs a first primary power supply voltage to supply power to the reading lamp circuit and outputs a first secondary power supply voltage to supply power to the control circuit; the control circuit is used for outputting a temperature compensation instruction to the reading lamp circuit according to the temperature information acquired by the temperature acquisition circuit, outputting a second primary power supply voltage to supply power to the temperature acquisition circuit, and outputting a second secondary power supply voltage to supply power to the touch key circuit; the reading lamp circuit is used for controlling the illumination state of the reading lamp according to the temperature compensation command. The control circuit is also used for outputting a touch instruction to the reading lamp circuit according to the touch information acquired by the touch key circuit. The utility model discloses have the temperature feedback function, realize that light compensation keeps good stable illuminating effect, promote the user and use experience.

Description

Interior lamp control circuit and interior lamp

Technical Field

The utility model relates to an interior trim lamp technical field indicates an interior trim lamp control circuit and interior trim lamp especially.

Background

With the continuous development of social economy, the living standard of people is increasingly improved, and more families are equipped with automobiles. Interior trim is also receiving increasing attention from users as a part of the car, wherein, the improvement of the interior trim quality of the car through the interior trim lamp plays an increasingly important role.

At present, the interior lamp of an automobile has the disadvantages that only illumination is usually provided, and temperature feedback is not provided to realize light compensation, and the temperature of the interior lamp rises along with the rise of the interior lamp due to the longer time the interior lamp is turned on, and the light attenuation is caused by the high temperature, so that the light is darkened, and the user experience is poor. And at present, the automotive interior lamp adopts a mechanical key to control the on-off or illumination brightness of the interior lamp, the service life of the mechanical key is short, and the user experience is poor.

Disclosure of Invention

The utility model aims at providing an interior lamp control circuit and interior lamp realize having the temperature feedback function, realize that light compensation keeps good stable illuminating effect, promote the user and use experience.

The utility model provides a technical scheme as follows:

the utility model provides an interior lamp control circuit, include:

the reading lamp circuit, the temperature acquisition circuit, the power circuit, the control circuit, the interface circuit and the touch key circuit;

the power supply output end of the interface circuit is connected with the power supply input end of the power supply circuit;

the power supply output end of the power supply circuit outputs a first primary power supply voltage to supply power to the reading lamp circuit and outputs a first secondary power supply voltage to supply power to the control circuit;

the control circuit is used for outputting a temperature compensation instruction to the reading lamp circuit according to the temperature information acquired by the temperature acquisition circuit, outputting a second primary power supply voltage to supply power to the temperature acquisition circuit, and outputting a second secondary power supply voltage to supply power to the touch key circuit;

the reading lamp circuit is used for controlling the illumination state of the reading lamp according to the temperature compensation instruction.

The control circuit is also used for outputting a touch instruction to the reading lamp circuit according to the touch information acquired by the touch key circuit.

Further, the control circuit includes: the device comprises an MCU chip, a zero ohm resistor and a filter capacitor;

a first pin of the MCU chip is connected to the first secondary power supply voltage, a fifteenth pin and a forty-fifth pin of the MCU chip respectively output the second primary power supply voltage, and a forty-fourth pin of the MCU chip outputs a second final power supply voltage;

three filter capacitors are connected in parallel, first ends of the three filter capacitors are respectively connected to the second primary power supply voltage, and second ends of the three filter capacitors are respectively grounded;

and the zero-ohm resistor is connected into the second final supply voltage and then outputs the second secondary supply voltage.

Further, the interface circuit includes: LIN connectors, BDM connectors;

the LIN connector is used for acquiring LIN signals;

a first output pin of the LIN connector is respectively connected with a first end of a sixth capacitor and a first end of a seventh capacitor;

a second output pin of the LIN connector is connected with a twenty-fourth pin of the MCU chip, and a third output pin of the LIN connector is grounded;

a first output pin of the BDM connector is respectively connected with a first end of a thirty-fourth resistor and a twenty-sixth pin of the MCU chip, and a second end of the thirty-fourth resistor is connected to the second primary power supply voltage;

a second output pin of the BDM connector is connected to a second primary power supply voltage, a fourth output pin of the BDM connector is connected with a thirty-sixth pin of the MCU chip, and a sixth output pin of the BDM connector is grounded;

the interior light control circuit further comprises:

an indicator light circuit and/or an atmosphere light circuit;

the control circuit is also used for outputting a touch instruction to any one or more of the indicator light circuit, the atmosphere light circuit and the reading light circuit according to the touch information acquired by the touch key circuit;

the control circuit is further used for outputting an LIN instruction to any one or more of the indicator light circuit, the atmosphere light circuit and the reading light circuit according to the LIN signal transmitted by the first output pin;

the reading lamp circuit is connected with the control circuit, a power supply input end of the reading lamp circuit is connected with the first primary power supply voltage, and the reading lamp circuit is used for controlling the illumination state of the reading lamp according to the touch instruction or the LIN instruction;

the atmosphere lamp circuit is connected with the control circuit, a power supply input end of the atmosphere lamp circuit is connected with the second primary power supply voltage, and the atmosphere lamp circuit is used for controlling the lighting state of the atmosphere lamp according to the touch instruction or the LIN instruction;

the indicating lamp circuit is connected with the control circuit, a power supply input end of the indicating lamp circuit is connected with the first primary power supply voltage, and the indicating lamp circuit is used for controlling the lighting state of the indicating lamp according to the touch instruction or the LIN instruction.

Further, the reading lamp circuit comprises: the LED comprises a first light emitting diode, a resistor and an N-type triode;

the cathode of the first light emitting diode is connected with the collector of a first N-type triode, the emitter of the first N-type triode is respectively connected with the first ends of a first resistor and a second resistor and the base of a second N-type triode, and the second ends of the first resistor and the second resistor are grounded;

an emitting electrode of the second N-type triode is connected with a first end of a third resistor and then grounded, and a collector electrode of the second N-type triode is respectively connected with a base electrode of the first N-type triode and a second end of the third resistor;

the second end of the third resistor is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with an eighteenth pin of the MCU chip;

the first light-emitting diode is used for controlling the light-emitting state of the first light-emitting diode according to the temperature compensation instruction, so that the illumination state of the reading lamp is controlled.

Further, the atmosphere lamp circuit comprises: the LED comprises a first chromaticity light-emitting diode, a second chromaticity light-emitting diode, a third chromaticity light-emitting diode, a fourth chromaticity light-emitting diode, a bidirectional breakdown diode, a resistor and an N-type triode;

the anode of the first chromaticity light-emitting diode is respectively connected with the first end of a sixth resistor and the first end of a first bidirectional breakdown diode, and the second end of the sixth resistor is connected to the second primary power supply voltage;

a collector of a third N-type triode is respectively connected with a cathode of the first chromaticity light emitting diode and a second end of the first bidirectional breakdown diode, a base of the third N-type triode is respectively connected with a first end of a seventh resistor and a first end of an eighth resistor, a second end of the seventh resistor is connected with a thirtieth pin of the MCU chip, a second end of the eighth resistor is grounded, and an emitter of the third N-type triode is connected with a ninth resistor and then grounded;

the anode of the second chromaticity light-emitting diode is respectively connected with the first end of a tenth resistor and the first end of a second bidirectional breakdown diode, and the second end of the tenth resistor is connected to the second primary supply voltage;

a collector of a fourth N-type triode is respectively connected with a cathode of the second chromaticity light-emitting diode and a second end of the second bidirectional breakdown diode, a base of the fourth N-type triode is respectively connected with a first end of an eleventh resistor and a first end of a twelfth resistor, a second end of the eleventh resistor is connected with a thirty-first pin of the MCU chip, a second end of the twelfth resistor is grounded, and an emitter of the fourth N-type triode is connected with a thirteenth resistor and then grounded;

an anode of the third chromaticity light emitting diode is respectively connected with a first end of a fourteenth resistor and a first end of a third bidirectional breakdown diode, and a second end of the fourteenth resistor is connected to the second primary supply voltage;

a collector of a fifth N-type triode is respectively connected with a cathode of the third chromaticity light-emitting diode and a second end of the third bidirectional breakdown diode, a base of the fifth N-type triode is respectively connected with a first end of a fifteenth resistor and a first end of a sixteenth resistor, a second end of the fifteenth resistor is connected with a thirty-seventh pin of the MCU chip, a second end of the sixteenth resistor is grounded, and an emitter of the fifth N-type triode is connected with a seventeenth resistor and then grounded;

the anode of the fourth chromaticity light-emitting diode is respectively connected with the first end of an eighteenth resistor and the first end of a fourth bidirectional breakdown diode, and the second end of the eighteenth resistor is connected to the second primary power supply voltage;

the collector of sixth N type triode respectively with fourth chromaticity emitting diode's negative pole, fourth two-way breakdown diode's second end are connected, the base of sixth N type triode is connected with the first end of nineteenth resistance and the first end of twentieth resistance respectively, the second end of nineteenth resistance with the thirty second pin of MCU chip is connected, and the second end ground connection of twentieth resistance, the earth connection behind the projecting pole and the twenty first ohmic connection of sixth N type triode.

Further, the indicator light circuit includes: the second light-emitting diode, the resistor and the N-type triode;

a twenty-second resistor and a twenty-third resistor are connected in parallel, and first ends of the twenty-second resistor and the twenty-third resistor are connected to the first primary power supply voltage;

the anode of the second light emitting diode is respectively connected with the second ends of the twenty-second resistor and the twenty-third resistor, and the cathode of the second light emitting diode is connected with the collector of the seventh N-type triode;

a base electrode of the seventh N-type triode is respectively connected with a first end of the twenty-fourth resistor, a first end of the twenty-fifth resistor and a collector electrode of the eighth N-type triode;

a second end of the twenty-fourth resistor is connected with a thirty-ninth pin of the MCU chip, and a second end of the twenty-fifth resistor is connected with an emitter of the eighth N-type triode and then grounded;

and an emitter of the seventh N-type triode is respectively connected with a first end of a thirty-fifth resistor and a base of the eighth N-type triode, and a second end of the thirty-fifth resistor is grounded.

Further, the touch key circuit includes: a touch chip, a resistor and a capacitor;

a sixth pin of the touch chip is connected with a first end of a thirtieth resistor, and a second end of the thirtieth resistor is connected with a fortieth pin of the MCU chip;

a first pin of the touch chip is connected with a first end of a twenty-sixth resistor, and a second end of the twenty-sixth resistor is connected with a forty-second pin of the MCU chip;

the eighth pin of the touch chip is connected with the first end of a twenty-seventh resistor, and the second end of the twenty-seventh resistor is connected with the forty-first pin of the MCU chip;

a forty-first pin and a forty-second pin of the MCU chip are respectively connected with a twenty-eighth resistor and a twenty-ninth resistor in a one-to-one correspondence manner and then are connected to the second primary power supply voltage;

the second pin and the third pin of the touch chip are respectively connected with the first capacitor and the second capacitor in a one-to-one correspondence manner and then are respectively grounded;

a fourth pin of the touch chip is respectively connected with a first end of a third capacitor and a first end of a fourth capacitor and is connected with the second secondary power supply voltage, and a second end of the third capacitor and a second end of the fourth capacitor are respectively grounded;

and a fifth pin of the touch chip is grounded, and a seventh pin of the touch chip is connected with the touch key after being connected with the thirty-first resistor.

Further, the temperature acquisition circuit includes: temperature sensitive resistors, resistors and capacitors;

a first end of a thirty-second resistor is connected to the second primary power supply voltage, and a second end of the thirty-second resistor is connected with a first end of a thirty-third resistor and a first end of the temperature-sensitive resistor respectively;

and the second end of the thirty-third resistor is respectively connected with the first end of the fifth capacitor and the thirteenth pin of the MCU chip, and the second end of the temperature-sensitive resistor is connected with the second end of the fifth capacitor and then grounded.

Further, the power supply circuit includes: polar capacitors, diodes;

the polar capacitor, the sixth capacitor and the seventh capacitor are connected in parallel, and a first end of the sixth capacitor, a first end of the seventh capacitor and a first end of the polar capacitor are respectively connected with a first output pin of the LIN connector, an anode of the first diode and an anode of the second diode;

a second end of the sixth capacitor and a second end of the seventh capacitor are respectively grounded;

the first primary supply voltage is output at the cathode of the first diode;

and the cathode of the second diode is connected with the anode of the polar capacitor and then outputs the first secondary power supply voltage, and the cathode of the polar capacitor is grounded.

The utility model also provides an interior lamp, include interior lamp control circuit.

Through the utility model provides a pair of interior lamp control circuit and interior lamp can have the temperature feedback function, realizes that light compensation keeps good stable illuminating effect, promotes the user and uses experience.

Drawings

The above features, technical features, advantages and implementations of an interior light control circuit and an interior light will be further explained in a clearly understandable manner in the following description of preferred embodiments in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of an interior lamp control circuit according to the present invention;

fig. 2 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 3 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 4 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 5 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 6 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 7 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 8 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 9 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 10 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 11 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 12 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention;

fig. 13 is a schematic structural diagram of another embodiment of an interior light control circuit according to the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In particular implementations, the mobile clients described in embodiments of the present application include, but are not limited to, other portable devices such as mobile phones, laptops, or tablets having touch-sensitive surfaces (e.g., touch screen displays and/or touch pads).

The mobile client supports various applications, such as one or more of the following: a drawing application, a presentation application, a network creation application, a word processing application, a disc burning application, a spreadsheet application, a gaming application, a telephone application, a video conferencing application, an email application, an instant messaging application, an exercise support application, a photo management application, a digital camera application, a digital video camera application, a Web browsing application, a digital music player application, and/or a digital video player application.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

An embodiment of the utility model, as shown in fig. 1, an interior light control circuit, includes:

the reading lamp circuit 10, the temperature acquisition circuit 20, the power supply circuit 30, the control circuit 40, the interface circuit 50 and the touch key circuit 60;

the power output end of the interface circuit 50 is connected with the power input end of the power circuit 30;

a power output of the power circuit 30 outputs a first primary supply Voltage (VDIODE) to power the reading lamp circuit 10 and a first secondary supply Voltage (VSUP) to power the control circuit 40;

the control circuit 40 is configured to output a temperature compensation command to the reading lamp circuit 10 according to the temperature information acquired by the temperature acquisition circuit 20, output a second primary power supply voltage (5VVDDX) to power the temperature acquisition circuit 20, and output a second secondary power supply voltage (5V) to power the touch key circuit 60;

the reading lamp circuit 10 is used for controlling the illumination state of the reading lamp according to the temperature compensation instruction.

The control circuit 40 is further configured to output a touch instruction to the reading lamp circuit 10 according to the touch information collected by the touch key circuit 60.

Specifically, the illumination state of the reading lamp includes an on state, an off state and an illumination brightness state of the reading lamp. When a user needs to read or needs sufficient illumination, the user switches the reading lamp through the touch key circuit 60, adjusts the brightness of the reading lamp, and performs temperature compensation on the reading lamp corresponding to the reading lamp circuit 10 through the temperature acquisition circuit 20 according to the acquired temperature information, so that the lamp illumination device has a good and stable lamp illumination effect. Furthermore, the utility model discloses simple structure, it is small, easy to assemble. And because the touch key control is adopted, compared with a mechanical key, the service life is longer, and the use experience is better.

An embodiment of the utility model, an interior light control circuit, include:

the reading lamp circuit 10, the temperature acquisition circuit 20, the power supply circuit 30, the control circuit 40, the interface circuit 50, the touch key circuit 60, the indicator lamp circuit 80 and/or the atmosphere lamp circuit 70;

The control circuit 40 is further configured to output a touch instruction to the reading lamp circuit 10 according to the touch information collected by the touch key circuit 60;

the control circuit 40 is further configured to output a touch instruction to any one or more of the indicator light circuit, the atmosphere light circuit and the reading light circuit according to the touch information acquired by the touch key circuit;

the control circuit 40 is further configured to output a LIN command to any one or more of the indicator light circuit, the atmosphere light circuit and the reading light circuit according to the LIN signal transmitted by the first output pin;

the reading lamp circuit is connected with the control circuit 40, a power supply input end of the reading lamp circuit is connected with the first primary power supply voltage, and the reading lamp circuit is used for controlling the illumination state of the reading lamp according to the touch instruction or the LIN instruction;

the atmosphere lamp circuit is connected with the control circuit 40, a power supply input end of the atmosphere lamp circuit is connected with the second primary power supply voltage, and the atmosphere lamp circuit is used for controlling the lighting state of the atmosphere lamp according to the touch instruction or the LIN instruction;

the indicator light circuit is connected with the control circuit 40, a power supply input end of the indicator light circuit is connected with the first primary power supply voltage, and the indicator light circuit is used for controlling the illumination state of the indicator light according to the touch instruction or the LIN instruction.

Specifically, as shown in fig. 2, the interior light control circuit in the present embodiment further includes an indicator light circuit 80 in addition to the reading light circuit 10, the temperature acquisition circuit 20, the power circuit 30, the control circuit 40, the interface circuit 50, and the touch key circuit 60 in the above embodiments. As shown in fig. 3, the interior light control circuit in the present embodiment includes an atmosphere light circuit 70 in addition to the reading light circuit 10, the temperature acquisition circuit 20, the power supply circuit 30, the control circuit 40, the interface circuit 50, and the touch key circuit 60 in the above-described embodiment. As shown in fig. 4, the interior light control circuit in the present embodiment includes an indicator light circuit 80 and an atmosphere light circuit 70 in addition to the reading light circuit 10, the temperature acquisition circuit 20, the power supply circuit 30, the control circuit 40, the interface circuit 50, and the touch key circuit 60 in the above-described embodiment.

The atmosphere lamp is switched on and off by touching the key circuit 60, and the brightness of the atmosphere lamp is adjusted. The utility model discloses with reading lamp, atmosphere lamp and touch button integration at a PCB to including MCU circuit and temperature acquisition circuit 20, except that the user need read or need the illumination of user when sufficient illumination, can also provide colored illumination, the atmosphere in the rendering up car.

The indicator light is turned on and off by touching the key circuit 60, and the brightness of the indicator light is adjusted. The utility model discloses with reading lamp, pilot lamp and touch button integration in a PCB to including MCU circuit and temperature acquisition circuit 20, except that the user need read or need the illumination of user when sufficient illumination, can also provide touch button and be shaded, so that help the user to find the position of touch button under the not enough condition of luminance in dark or car.

The atmosphere lamp is switched on and off by touching the key circuit 60, and the brightness of the atmosphere lamp is adjusted. The indicator light is turned on and off by touching the key circuit 60, and the brightness of the indicator light is adjusted. The utility model discloses with reading lamp, atmosphere lamp, pilot lamp and touch button integration at a PCB to including MCU circuit and temperature acquisition circuit 20, except that the user need read or need be sufficient for the user illumination when throwing light on, can also provide colored illumination, play up atmosphere in the car. In addition, a touch key backlight can be provided to help the user find the location of the touch key in the case of darkness or insufficient brightness in the vehicle.

Realize multiple illumination function through this embodiment, small in size, the installation of being convenient for through the diversified lighting control of touch button inefficacy, promotes user's use and experiences.

Based on the above-described embodiment, as shown in fig. 12 and 13, the interface circuit includes: a LIN connector (J1), a BDM connector (J2);

the LIN connector (J1) is used for acquiring a LIN signal;

a first output pin of the LIN connector (J1) is respectively connected with a first end of a sixth capacitor and a first end of a seventh capacitor;

a second output pin of the LIN connector (J1) is connected with a twenty-fourth pin of the MCU chip (U2), and a third output pin of the LIN connector (J1) is grounded;

a first output pin of the BDM connector (J2) is connected with a first end of a thirty-fourth resistor and a twenty-sixth pin of the MCU chip (U2), and a second end of the thirty-fourth resistor is connected to the second primary power supply voltage;

a second output pin of the BDM connector (J2) is connected to a second primary power supply voltage, a fourth output pin of the BDM connector (J2) is connected with a thirty-sixth pin of the MCU chip (U2), and a sixth output pin of the BDM connector (J2) is grounded;

specifically, a fourth output pin of the BDM connector (J2) is connected to a thirty-sixth pin of the MCU chip (U2) for providing a debugging program to the MCU chip (U2).

The LIN connector (J1) is connected with a vehicle-mounted central control of an automobile, a vehicle-mounted large screen is arranged on the vehicle-mounted central control, the vehicle-mounted large screen of the vehicle-mounted central control is connected with the LIN connector (J1) through an LIN line, a user can select and adjust any one or more of a reading lamp, an indicator lamp and an atmosphere lamp on a control interface of the vehicle-mounted large screen to control, namely user operation is obtained through the vehicle-mounted large screen of the vehicle-mounted central control, LIN signals are generated according to the user operation and transmitted to the LIN connector (J1) through the LIN line, the LIN connector (J1) transmits the LIN signals to a twenty-fourth pin of the MCU chip (U2) through a second output pin of the LIN connector (J1), and the MCU chip (U2) generates corresponding LIN instructions according to the obtained LIN. Since the LIN signal includes the device information of the object to be controlled (reading lamp, indicator lamp, atmosphere lamp) that the user wants to control, and thus the LIN command generated by the MCU chip (U2) also includes the device information according to the object to be controlled, the MCU chip (U2) outputs the corresponding PWM signal to the corresponding LED lamp control circuit 40 (including the indicator lamp circuit, the atmosphere lamp circuit, and the reading lamp circuit) according to the device information point-to-point of the object to be controlled, so that the indicator lamp circuit (or the atmosphere lamp circuit, the reading lamp circuit) controls the lighting state (including the on state, the off state, and the lighting brightness state of the reading lamp) of the indicator lamp (or the atmosphere lamp, the reading lamp) according to the received LIN command.

Based on the above embodiment, the reading lamp circuit 10 includes: a first light emitting diode (LED1), a resistor, and an N-type triode;

the cathode of the first light emitting diode (LED1) is connected with the collector (C) of a first N-type triode (Q2), the emitter (E) of the first N-type triode (Q2) is respectively connected with the first end of a first resistor (R11) and a second resistor (R10) and the base (B) of a second N-type triode (Q4), and the second ends of the first resistor (R11) and the second resistor (R10) are grounded;

an emitter (E) of the second N-type triode (Q4) is connected with a first end of a third resistor (R6) and then grounded, and a collector (C) of the second N-type triode (Q4) is respectively connected with a base (B) of the first N-type triode (Q2) and a second end of the third resistor (R6);

the second end of the third resistor (R6) is connected with the first end of a fourth resistor (R5), and the second end of the fourth resistor (R5) is connected with an eighteenth pin (18) of the MCU chip (U2);

the first light emitting diode (LED1) is used for controlling the lighting state of the first light emitting diode according to the temperature compensation instruction, so that the lighting state of the reading lamp is controlled.

The atmosphere lamp circuit 70 comprises: a first chromaticity light emitting diode (LED3A), a second chromaticity light emitting diode (LED3B), a third chromaticity light emitting diode (LED3C), a fourth chromaticity light emitting diode (LED3D), a diac, a resistor, and an N-type triode;

the anode of the first color temperature light emitting diode (LED3A) is respectively connected with the first end of a sixth resistor (R13) and the first end of a first bidirectional breakdown diode, and the second end of the sixth resistor (R13) is connected to the second primary supply voltage (5 VVDDX);

a collector (C) of a third N-type triode (Q5) is respectively connected with a cathode of the first color light emitting diode (LED3A) and a second end of the first bidirectional breakdown diode, a base (B) of the third N-type triode (Q5) is respectively connected with a first end of a seventh resistor (R16) and a first end of an eighth resistor (R18), a second end of the seventh resistor (R16) is connected with a thirtieth pin (30) of the MCU chip (U2), a second end of the eighth resistor (R18) is grounded, and an emitter (E) of the third N-type triode (Q5) is connected with a ninth resistor and then grounded;

the anode of the second chromaticity light emitting diode (LED3B) is respectively connected with the first end of a tenth resistor (R12) and the first end of a second bidirectional breakdown diode, and the second end of the tenth resistor (R12) is connected to the second primary supply voltage (5 VVDDX);

a collector (C) of a fourth N-type triode (Q6) is respectively connected with a cathode of the second chromaticity light emitting diode (LED3B) and a second end of the second bidirectional breakdown diode, a base (B) of the fourth N-type triode (Q6) is respectively connected with a first end of an eleventh resistor (R17) and a first end of a twelfth resistor (R19), a second end of the eleventh resistor (R17) is connected with a thirty-first pin (31) of the MCU chip (U2), a second end of the twelfth resistor (R19) is grounded, and an emitter (E) of the fourth N-type triode (Q6) is connected with a thirteenth resistor (R23) and then grounded;

the anode of the third chromaticity light emitting diode (LED3C) is connected to the first end of a fourteenth resistor (R25) and the first end of the third diac, respectively, and the second end of the fourteenth resistor (R25) is connected to the second primary supply voltage (5 VVDDX);

a collector (C) of a fifth N-type triode (Q9) is connected to a cathode of the third chromaticity light emitting diode (LED3C) and a second end of the third diac, a base (B) of the fifth N-type triode (Q9) is connected to a first end of a fifteenth resistor (R29) and a first end of a sixteenth resistor (R32), a second end of the fifteenth resistor (R29) is connected to a thirty-seventh pin (37) of the MCU chip (U2), a second end of the sixteenth resistor (R32) is grounded, and an emitter (E) of the fifth N-type triode (Q9) is connected to a seventeenth resistor (R34) and then grounded;

the anode of the fourth chroma light-emitting diode (LED3D) is respectively connected with the first end of an eighteenth resistor (R26) and the first end of a fourth bidirectional breakdown diode, and the second end of the eighteenth resistor (R26) is connected to the second primary supply voltage (5 VVDDX);

a collector (C) of a sixth N-type triode (Q10) is connected to the cathode of the fourth chromaticity light emitting diode (LED3D) and the second end of the fourth diac, a base (B) of the sixth N-type triode (Q10) is connected to the first end of a nineteenth resistor (R28) and the first end of a twentieth resistor (R33), the second end of the nineteenth resistor (R28) is connected to the thirty-second pin of the MCU chip (U2), the second end of the twentieth resistor (R33) is grounded, and an emitter (E) of the sixth N-type triode (Q10) is grounded after being connected to the twenty-first resistor (R36).

The indicator light circuit 80 includes: a second light emitting diode (LED2), a resistor, and an N-type triode;

a twenty-second resistor (R9) and a twenty-third resistor (R1) are connected in parallel, and first ends of the twenty-second resistor (R9) and the twenty-third resistor (R1) are connected to the first primary supply Voltage (VDIODE);

the anode of the second light emitting diode (LED2) is respectively connected with the second ends of the twenty-second resistor (R9) and the twenty-third resistor (R1), and the cathode of the second light emitting diode (LED2) is connected with the collector (C) of a seventh N-type triode (Q1);

a base electrode (B) of the seventh N-type triode (Q1) is respectively connected with a first end of a twenty-fourth resistor (R4), a first end of a twenty-fifth resistor (R4) and a collector electrode (C) of an eighth N-type triode (Q3);

a second end of the twenty-fourth resistor (R4) is connected with a thirty-ninth pin (39) of the MCU chip (U2), and a second end of the twenty-fifth resistor (R4) is connected with an emitter (E) of the eighth N-type triode (Q3) and then grounded;

an emitter (E) of the seventh N-type triode (Q1) is respectively connected with a first end of a thirty-fifth resistor (R8) and a base (B) of an eighth N-type triode (Q3), and a second end of the thirty-fifth resistor (R8) is grounded.

The touch key circuit 60 includes: a touch chip (U3), a resistor, and a capacitor;

a sixth pin (6) of the touch chip (U3) is connected with a first end of a thirty-th resistor (R45), and a second end of the thirty-th resistor (R45) is connected with a fortieth pin (40) of the MCU chip (U2);

a first pin (1) of the touch chip (U3) is connected with a first end of a twenty-sixth resistor (R38), and a second end of the twenty-sixth resistor (R38) is connected with a forty-second pin (42) of the MCU chip (U2);

an eighth pin (8) of the touch chip (U3) is connected with a first end of a twenty-seventh resistor (R39), and a second end of the twenty-seventh resistor (R39) is connected with a forty-first pin (41) of the MCU chip (U2);

a forty-first pin (41) and a forty-second pin (42) of the MCU chip (U2) are respectively connected with a twenty-eighth resistor (R15) and a twenty-ninth resistor (R14) in a one-to-one correspondence manner and then are connected to the second primary power supply voltage (5 VVDDX);

the second pin (2) and the third pin (3) of the touch chip (U3) are respectively connected with the first capacitor (C11) and the second capacitor (C10) in a one-to-one correspondence manner and then are respectively grounded;

a fourth pin (4) of the touch chip (U3) is respectively connected with a first end of a third capacitor (C13) and a first end of a fourth capacitor (C14) and connected to the second secondary power supply voltage (5V), and a second end of the third capacitor (C13) and a second end of the fourth capacitor (C14) are respectively grounded;

the fifth pin (5) of the touch chip (U3) is grounded, and the seventh pin (7) of the touch chip (U3) is connected with the thirty-first resistor (R40) and then connected with the touch key (CS 0).

Specifically, a seventh pin (7) of a touch chip (U3) in the touch key circuit 60 is connected with a touch key (CS0) through a thirty-first resistor (R40), when a user touches the touch key (CS0), a sixth pin (6) of the touch chip (U3) outputs a digital signal to an MCU chip (U2), and a short-press/long-press judgment can be realized through an effective signal time, so that the MCU chip (U2) generates different touch commands. Meanwhile, the MCU chip (U2) can use an I2C communication mode, send configuration information to the touch chip (U3) through the first pin (1) of the touch chip (U3), and can also inquire whether touch action exists through the eighth pin (8) of the touch chip (U3).

The temperature acquisition circuit 20 includes: temperature sensitive resistor (NTC1), resistor and capacitor;

a first end of a thirty-second resistor (R24) is connected to the second primary supply voltage (5VVDDX), and a second end of the thirty-second resistor (R24) is connected to a first end of a thirty-third resistor (R27) and a first end of the temperature-sensitive resistor (NTC1), respectively;

and the second end of the thirty-third resistor (R27) is respectively connected with the first end of a fifth capacitor (C8) and the thirteenth pin (13) of the MCU chip (U2), and the second end of the temperature-sensitive resistor (NTC1) is connected with the second end of the fifth capacitor (C8) and then grounded.

Specifically, the utility model provides a temperature acquisition circuit 20, the analog channel of MCU chip (U2) is connected to temperature sensing circuit 20's temperature sensitive resistor (NTC1), judges current ambient temperature through gathering this passageway voltage analog quantity, realizes temperature feedback to dynamic adjustment illuminating effect, like illumination compensation.

The power supply circuit 30 includes: polar capacitance (C2), diode;

the polar capacitor (C2), the sixth capacitor (C15) and the seventh capacitor (C1) are connected in parallel, and the first end of the sixth capacitor (C15), the first end of the seventh capacitor (C1) and the first end of the polar capacitor (C2) are respectively connected with the first output pin (1) of the LIN connector (J1), the anode of the first diode (D2) and the anode of the second diode (D1);

a second terminal of the sixth capacitor (C15) and a second terminal of a seventh capacitor (C1) are respectively grounded;

the first primary supply Voltage (VDIODE) (VDIODE) is output at a cathode of the first diode (D2);

the cathode of the second diode (D1) is connected with the anode of the polar capacitor (C2) to output the first secondary supply Voltage (VSUP), and the cathode of the polar capacitor (C2) is grounded.

The interface circuit 50 includes: the debugging interface unit is connected with the power supply interface unit;

the power input end of the power interface unit is connected with the power supply, and the power output end of the power interface unit is connected with the power input end of the power circuit 30;

specifically, the power supply voltage of the reading lamp is 12V, sufficient illumination is provided, and the MCU chip (U2) outputs a PWM signal to realize illumination state control of the reading lamp. The atmosphere lamp can provide colored illumination to render the atmosphere in the vehicle. The power supply voltage of the atmosphere lamp is 5V, the atmosphere lamp is composed of four chromaticity LEDs (red light emitting diode, yellow light emitting diode, blue light emitting diode, and green light emitting diode, respectively), and of course, other chromaticity combinations may be provided as needed. The four colors are respectively controlled by different PWM outputs, so that the brightness of a certain light source can be independently controlled, and the four light sources are mixed into a new color with different brightness. The utility model discloses compare usually three-colour LED and increased fourth chromaticity light source (for example yellow light source), the illuminating effect is better, and the colour territory is wider.

In particular, the indicator lights provide backlighting for the keys to facilitate locating the keys in the dark or in-vehicle low-light conditions. The indicator lamp is supplied with 12V power, and the brightness is controlled by PWM.

Specifically, there are two ways for the touch key state output: I2C and GPIO. Two modes are reserved in the product to meet different design requirements. In addition, multiple touch key chips can be added continuously through I2C to expand the number of keys.

Specifically, an MCU chip (U2) was selected as model number S12ZVLA128 with a LIN interface to connect with a LIN connector to simplify the interior light control circuit wiring. The MCU chip (U2) can receive the touch information sent by the touch key circuit 60, the LIN signal sent by the LIN connector (J1), and the temperature information fed back by the temperature acquisition circuit 20, and generate a corresponding touch command (or LIN command) according to the touch information (or LIN signal), so as to output a PWM signal according to the corresponding touch command (or LIN command), so as to control the illumination states of the reading lamp, the atmosphere lamp, and the indicator lamp.

In addition, one or more temperature acquisition circuits 20 may be provided. If only one temperature acquisition circuit 20 is provided for the interior light control circuit, the temperature acquisition circuit 20 may be disposed near the following reading lamps (or indicator lamp, atmosphere lamp) according to the needs or experience of the user, so as to acquire the temperature information of the reading lamps (or indicator lamp, atmosphere lamp), respectively. If the interior light control circuit is provided with three temperature acquisition circuits 20, the three temperature acquisition circuits can be respectively arranged near the reading lamp, the indicating lamp and the atmosphere lamp so as to respectively acquire the temperature information of the reading lamp, the indicating lamp and the atmosphere lamp. Here, this is merely an example, and the scenario of providing two temperature acquisition circuits 20 is not described in detail here.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of program modules is illustrated, and in practical applications, the above-described distribution of functions may be performed by different program modules, that is, the internal structure of the apparatus may be divided into different program units or modules to perform all or part of the above-described functions. Each program module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one processing unit, and the integrated unit may be implemented in a form of hardware, or may be implemented in a form of software program unit. In addition, the specific names of the program modules are only used for distinguishing the program modules from one another, and are not used for limiting the protection scope of the application.

An embodiment of the utility model, an interior lamp, including the interior lamp control circuit in the above-mentioned embodiment.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An interior light control circuit, comprising:

the reading lamp circuit is used for controlling the illumination state of the reading lamp according to the temperature compensation instruction;

2. The interior light control circuit of claim 1, wherein the control circuit comprises: the device comprises an MCU chip, a zero ohm resistor and a filter capacitor;

3. The interior light control circuit of claim 2, wherein the interface circuit comprises: LIN connectors, BDM connectors;

the LIN connector is used for acquiring LIN signals;

the interior light control circuit further comprises: an indicator light circuit and/or an atmosphere light circuit;

4. The interior light control circuit of claim 2, wherein the reading light circuit comprises: the LED comprises a first light emitting diode, a resistor and an N-type triode;

5. The interior light control circuit of claim 3, wherein the mood light circuit comprises: the LED comprises a first chromaticity light-emitting diode, a second chromaticity light-emitting diode, a third chromaticity light-emitting diode, a fourth chromaticity light-emitting diode, a bidirectional breakdown diode, a resistor and an N-type triode;

6. The interior light control circuit of claim 3, wherein the indicator light circuit comprises: the second light-emitting diode, the resistor and the N-type triode;

7. The interior light control circuit of claim 2, wherein the touch button circuit comprises: a touch chip, a resistor and a capacitor;

8. The interior light control circuit of claim 2, wherein the temperature acquisition circuit comprises: temperature sensitive resistors, resistors and capacitors;

9. The interior light control circuit of claim 3, wherein the power supply circuit comprises: polar capacitors, diodes;

the first primary supply voltage is output at the cathode of the first diode;

10. An interior lamp, characterized by comprising the interior lamp control circuit according to any one of claims 1 to 9.