Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the illuminating lamp light source control system which can effectively improve the far-beam illumination brightness and meet different environmental requirements.
In order to solve the technical problems, the technical scheme of the invention is as follows: a lighting lamp light source control system comprises a light source group, a light source group driving module, a light source state control module, a manual control module and a high-low beam switching module, wherein the light source group, the light source group driving module, the light source state control module and the manual control module are sequentially connected, and the high-low beam switching module is connected with the light source state control module; the light source state control module controls the high-low beam switching module and the light source group driving module according to signals transmitted by the manual control module, and the light source group driving module controls the first light source group, the second light source group and the third light source group to be switched on and switched off to form a required lighting state.
Further, the illumination state includes passing light state, first high beam state and second high beam state, opens first light source group alone and forms passing light state, opens first light source group and second light source group simultaneously and forms first high beam state, opens first light source group and third light source group simultaneously and forms the second high beam state, and first high beam state and second high beam state present in turn.
And the automobile direct-current power supply is connected with the light source group driving module, the light source state control module and the manual control module and supplies power to the light source group driving module, the light source state control module and the manual control module.
Further, the light source group driving module comprises a first one-way driver connected with the first light source group, a second one-way driver connected with the second light source group and a third one-way driver connected with the third light source group, and a control switch is arranged between the automobile direct power supply and the light source state control module and between the second one-way driver and the third one-way driver.
Further, the first single-path driver, the second single-path driver and the third single-path driver are TPS92691-Q1 single-path drivers.
Further, the control switch is two load switches or an SPDT switch.
Furthermore, the far and near light switching module comprises an electromagnetic valve and a structural part, and the electromagnetic valve is connected with the light source state control module.
Further, the light source state control module comprises a single chip microcomputer and a voltage adjusting circuit connected with the automobile direct-current power supply.
Furthermore, the control switch is an SPDT switch, and the light source state control module includes a level conversion circuit, a buffer circuit, and a level conversion circuit, which are disposed between the manual control module and the high-low beam switching module and are connected in sequence, and a counter and a voltage conversion circuit, which are disposed between the buffer circuit and the light source group driving module and are connected in sequence.
Further, control switch is two load switches, light source state control module is including locating level shift circuit, buffer circuit and the level shift circuit that just connects gradually between artifical control module and far and near light switching module, and locate counter and the level shift circuit that just connects gradually between buffer circuit connection and the light source group drive module.
The invention provides a light source control system of an illuminating lamp, which comprises a light source group, a light source group driving module, a light source state control module, a manual control module and a high-low beam switching module, wherein the light source group, the light source group driving module, the light source state control module and the manual control module are sequentially connected, and the high-low beam switching module is connected with the light source state control module; the light source state control module controls the high-low beam switching module and the light source group driving module according to signals transmitted by the manual control module, and the light source group driving module controls the first light source group, the second light source group and the third light source group to be switched on and switched off to form a required lighting state. Carry out far-reaching rays auxiliary lighting through second light source group or third light source group, not only can improve far-reaching rays central illuminance, and can switch different light source groups through manual control module, light source state control module and light source group drive module according to the lighting demand of different environment and carry out auxiliary lighting, the adaptability is better, can deal with more complicated far-reaching rays demand. The illuminating lamp light source control system is simple to operate, high in control accuracy, less in time delay and good in real-time performance.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the present invention provides an illumination lamp light source control system, which includes a light source group, a light source group driving module 20, a light source state control module 30, a manual control module 40, and a high beam and low beam switching module 50 connected to the light source state control module 30, where the light source group includes a first light source group 110, a second light source group 120, and a third light source group 130; the light source state control module 30 controls the high-low beam switching module 50 and the light source group driving module 20 according to the signal transmitted by the manual control module 40, and the light source group driving module 20 controls the first light source group 110, the second light source group 120 and the third light source group 130 to be turned on or off to form a desired illumination state. Specifically, the first light source group 110, the second light source group 120, and the third light source group 130 respectively include two or more LED light sources, the light source group driving module 20 provides driving power for the first light source group 110, the second light source group 120, and the third light source group 130, during the control process, the manual control module 40 sends a control signal to the light source state control module 30, the light source state control module 30 controls the light source group driving module 20 according to the control signal to enable the first light source group 110, the second light source group 120, and the third light source group 130 to be connected or disconnected from the driving power, and the high beam and low beam switching module 50 is responsible for switching between the high beam state and the low beam state. The illumination states include a low beam state, a first high beam state and a second high beam state, both of which belong to the high beam state, and the high/low beam switching module 50 does not distinguish the first high beam state from the second high beam state. The first light source group 110 is turned on individually to form a low beam state, the first light source group 110 and the second light source group 120 are turned on simultaneously to form a first high beam state, the first light source group 110 and the third light source group 130 are turned on simultaneously to form a second high beam state, and the first high beam state and the second high beam state are presented in turn in the control process. Carry out far-reaching rays auxiliary lighting through second light source group 120 or third light source group 130, not only can improve far-reaching rays central illuminance, and can switch different light source groups through manual control module 40, light source state control module 30 and light source group drive module 20 according to the illumination demand of different environment and carry out auxiliary lighting, the adaptability is better, can deal with more complicated far-reaching rays demand. The illuminating lamp light source control system is simple to operate, high in control accuracy, less in time delay and good in real-time performance.
Specifically, in the low beam mode, only the first light source group 110 is turned on, and the second light source group 120 and the third light source group 130 are in an off state.
In the high beam mode, the first light source group 110 is always turned on, and the second light source group 120 and the third light source group 130 are turned on alternately according to the high beam mode, but not turned on simultaneously, and the specific embodiment is as follows: counting is started after the power is switched on, and when the high beam is lightened for the 1 st time, the high beam enters a first high beam state; when the 2 nd time is lightened after the 1 st time of high beam is closed, the second high beam state is entered; and when the 2 nd high beam is turned off and then the 3 rd high beam is turned on, the first high beam state is entered and the cycle is sequentially carried out.
The switching rule of the high beam state, including but not limited to the above-mentioned number of times rule, may also be, start counting after the circular telegram, the first M times of high beam lights are lighted, enter the first high beam state, then N times of high beam lights are lighted, enter the second high beam state, then M times of high beam lights are lighted, enter high beam state 1. Wherein M is more than or equal to 1, and N is more than or equal to 1. As mentioned above, M is 1 and N is 1.
If M is 2 and N is 1, the switching rule is: counting is started after the power is switched on, and when the high beam is lightened for the 1 st time, the high beam enters a first high beam state; when the 2 nd time is lightened after the 1 st time of high beam is closed, the high beam enters a first high beam state; when the 2 nd high beam is turned off and then turned on for the 3 rd time, the second high beam state is entered; when the 4 th time is lightened after the 3 rd time of high beam is closed, the high beam enters a first high beam state; when the 4 th high beam is turned off and then turned on for the 5 th time, the high beam enters a first high beam state; and when the 5 th high beam is turned off and then turned on for the 6 th time, the second high beam state is entered.
Preferably, the lighting lamp light source control system further includes an automobile dc power supply 60, and the automobile dc power supply is connected to the light source group driving module 20, the light source state control module 30 and the manual control module 40, and is configured to supply power to the three modules. The vehicle dc power supply 60, i.e. the battery on the vehicle, is used to power several other modules.
The light source group driving module 20 includes a first single-channel driver 210 connected to the first light source group 110, a second single-channel driver 220 connected to the second light source group 120, and a third single-channel driver 230 connected to the third light source group 130, and control switches are disposed between the vehicle dc power supply 60 and the light source state control module 30, and between the second single-channel driver 220 and the third single-channel driver 230. Specifically, the power supplied by the vehicle dc power supply 60 to the first light source group 110, the second light source group 120, and the third light source group 130 needs to be driven by corresponding separate drivers, and since the first light source group 110 is in an on state no matter in the low beam mode or the high beam mode, and the second light source group 120 and the third light source group 130 are only turned on in turn in the high beam mode, the present embodiment sets a control switch before the second single-way driver 220 and the third single-way driver 230, and is turned on or off under the control of the light source state control module 30, thereby controlling whether the second single-way driver 220 and the third single-way driver 230 operate. Preferably, the control switch may adopt two load switches, that is, one load switch is respectively disposed before the second single-way driver 220 and the third single-way driver 230, as shown in fig. 2, the load switches are space-saving integrated power switches, and can be controlled to perform on and off operations, so as to facilitate power sequencing, have a high integration level, and effectively reduce the BOM number and the circuit board space. The load switch may be a single-pole single-throw switch of LM73100d, a control end of which is connected to the light source state control module 30, an input end of which is connected to an input car dc power supply 60, and an output end of which is connected to the second single-way driver 220 or the third single-way driver 230, and the input end and the output end are controlled to be conducted or not conducted by the light source state control module 30, so as to control whether the car dc power supply 60 supplies power to the second single-way driver 220 and the third single-way driver 230. Of course, the control switch may also be an SPDT (single pole double throw) switch, such as a relay with a model number of PE014048, as shown in fig. 3, a control end of the relay is connected to the light source state control module 30, an input end of the relay is connected to the vehicle dc power supply 60, two output ends of the relay are respectively connected to the second single-way driver 220 and the third single-way driver 230, and the second single-way driver 220 or the third single-way driver 230 is selected to be turned on by changing a conduction channel of the power rail through the light source state control module 30.
Preferably, the first single-channel driver 210, the second single-channel driver 220 and the third single-channel driver 230 may adopt TPS92691-Q1 single-channel drivers. According to the volt-ampere characteristics of the light source group and the voltage of the automobile direct current power supply 60, a proper topological structure is adopted for supplying power, as shown in fig. 4a-4c, a schematic circuit diagram of 3 commonly used topological structures built by using TPS92691-Q1 single-path drivers and peripheral components is shown, when the voltage range of the automobile direct current power supply 60 is always lower than the voltage of the light source group, the boost topological driving circuit shown in fig. 4a can be used, and core elements of the boost topological driving circuit are an inductor L, a switching tube Q1 and a freewheeling diode D. When the switching tube Q1 is turned on, the voltage of the cathode end of the freewheeling diode D is higher than the voltage of the anode end, the freewheeling diode D is not turned on, and the current along with the inductor L is gradually increased; when the switching tube Q1 is turned off, because the current of the inductor L cannot change suddenly, induced electromotive force is generated at the anode end of the freewheeling diode D, so that the freewheeling diode is turned on, and the inductor current gradually decreases until the switching tube Q1 is turned on in the next period in the steady state.
When the voltage range of the vehicle dc power supply 60 may be lower than or higher than the voltage of the light source group, the buck-boost topology driving circuit in fig. 4b may be used, and its core components are the switching tube Q1, the freewheeling diode D and the inductor L, and the reference voltage of the output voltage is VIN, so when the output voltage of the topology is referred to GND, the output voltage is higher than the input voltage, and the work flow in one cycle is: when the switching tube Q1 is conducted, the current of the inductor L is gradually increased, and the freewheeling diode D is closed; when the switching tube Q1 is turned off, the current of the inductor L cannot suddenly change to generate induced electromotive force, and the freewheeling diode D is turned on.
When the voltage range of the vehicle dc power supply 60 is always higher than the voltage of the light source group, the buck topology driving circuit in fig. 4c can be used. The core elements of the device are an inductor L, a freewheeling diode D and a switching tube Q1. When the switching tube Q1 is conducted, the current of the inductor L is gradually increased, and the freewheeling diode D is reversely biased and is not conducted; when the switching tube Q1 is turned off, the inductor L current cannot change suddenly, an induced electromotive force is generated to forward bias the freewheeling diode D to be on, and the inductor L current gradually decreases until the next period in the steady state.
Preferably, the distance and near light switching module 50 includes an electromagnetic valve 510 and a structural member 520, the electromagnetic valve 510 drives the structural member to control the light beam shape, the electromagnetic valve 510 controls the level of the device, and only 2 output states represent the near light state and the far light state respectively, the structural member here may be a light shielding sheet, and drives the light shielding sheet to move to shield a part of the light emitted by the light source set to form a near light spot or a far light spot.
Preferably, as shown in fig. 5, the light source state control module 30 includes a single chip microcomputer 310 and a voltage adjusting circuit 320 connected to the vehicle dc power supply 60, and the single chip microcomputer 310 receives an instruction from the manual control module 40, controls the high and low beam switching module 50 to switch, and controls the operation of the light source group driving module 20.
Example 2
Different from the embodiment 1, in this embodiment, the light source state control module 30 includes a first level conversion circuit 330, a buffer circuit 340, and a second level conversion circuit 350, which are sequentially connected to each other and are disposed between the manual control module 40 and the high-low beam switching module 50, and a counter 360 and a voltage conversion circuit 370, which are sequentially connected to each other and are disposed between the buffer circuit 340 and the light source group driving module 20. Specifically, the first level shifter circuit 330 and the second level shifter circuit 350 are used for converting the voltage of the input signal into the target voltage, and have the same structure and the same operation principle, and the first level shifter circuit 330 is taken as an example and is composed of MOS transistors Q1 and Q2 and resistors R3, R4, R5 and R6. When the grid of the MOS transistor Q1 is at a low level, the MOS transistor Q1 is disconnected, the drain of the MOS transistor Q1 is at a high level VCC1, the grid of the MOS transistor Q2 is at a high level VCC1, the MOS transistor Q2 is connected, and the drain of the MOS transistor Q2 is at a low level; when the gate of the MOS transistor Q1 is at a high level, the MOS transistor Q1 is turned on, the drain of the MOS transistor Q1 is at a low level, the MOS transistor Q2 is turned off, and the gate of the MOS transistor Q2 is at a high level VCC 2. The buffer circuit 340, i.e., the voltage follower, can increase the driving capability of the signal. The positive input end of the amplifier is connected with an input signal, and the negative input end of the amplifier is connected with the output. The control signal of the manual control module 40 is connected to the gate of the MOS transistor Q1, wherein the high beam signal is a high level signal, and the low beam signal is a low level signal, when the manual control module 40 sends the low beam signal, the first level shift circuit 330 outputs a low level, the output of the second level shift circuit 350 is also a low level, and at this time, the electromagnetic valve 510 drives the structural member to move to form a near light illumination spot. On the contrary, when the manual control module 40 sends a high beam signal, the first level conversion circuit 330 outputs a high level, the output of the second level conversion circuit 350 is also a high level, and the electromagnetic valve 510 drives the structure to move to form a high beam illumination spot. In this embodiment, as shown in fig. 6b, the counter 360 may be an 74161 counter, the control signal output by the manual control module 40 is converted into a level signal after passing through the first level conversion circuit 330 and the buffer circuit 340 in sequence, and the level signal is counted at the CP end of the counter 360, the output end Q1 of the counter 360 is subjected to voltage conversion by the voltage conversion circuit 370 to control the SPDT switch of the light source group driving module 20, and fig. 5 shows an embodiment in which the SPDT switch and 3 single-path drivers are used as the light source group driving module 20. The circuit formed by the capacitor C1 and the resistors R1, R2 and VCC2 terminated by the RD of the counter 360 is used for performing initialization clear 0 of power-up, that is, the power-up high beam state after power-off is the same by default.
As shown in fig. 6b, in order to use 2 load switches as an embodiment, the signal at the output terminal Q1 of the counter 360 needs to be divided into two paths, one path is connected to the EN terminal of one load switch after level conversion, and the other path is connected to the EN terminal of the other load switch after level conversion through the inverter 380.
Although the embodiments of the present invention have been described in the specification, these embodiments are merely provided as a hint, and should not limit the scope of the present invention. Various omissions, substitutions, and changes may be made without departing from the spirit of the invention and are intended to be within the scope of the invention.