Light-emitting element control circuit, control method and electronic equipment

Abstract

The invention relates to a light-emitting element control circuit, a control method and electronic equipment. The light-emitting element control circuit comprises a power output module and a driving module, the power output module is electrically connected with the driving module; the driving module is electrically connected with the light-emitting element; the driving module is used for providing driving voltage for the light-emitting element and feeding back the driving voltage to the power output module; and the power output module is used for providing working voltage for the driving module and controlling the voltage difference between the working voltage and the driving voltage to be constant according to the acquired driving voltage. According to the invention, the heating phenomenon of the driving module can be improved, the number of light-emitting element channels conducted by the driving module can be increased, and the channel utilization rate is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic circuits, and in particular to a light emitting element control circuit, a control method, and an electronic device. Background Art

[0002] In the light-emitting element control circuit, the linear chip provides voltage to the light-emitting element to make it emit light. For example, the light-emitting element is an LED (Light Emitting Diode). Due to the characteristics of the LED itself, the voltage of the LED will decrease as its temperature increases. However, the voltage input to the linear chip is constant, and the voltage consumed by the LED decreases, which causes the voltage difference on the LED channel of the linear chip to increase as the voltage across the LED decreases. As a result, the linear chip generates a lot of heat, and the linear chip will be burned if the temperature is too high. In order to avoid damage to the linear chip, the number of LED channels used by the linear chip is usually limited, resulting in the channel utilization rate of the linear chip being affected. Summary of the invention

[0003] In order to solve the above technical problems, the present disclosure provides a light emitting element control circuit, a control method and an electronic device.

[0004] In a first aspect, the present disclosure provides a light emitting element control circuit, including: a power output module and a driving module;

[0005] The power output module is electrically connected to the driving module; the driving module is electrically connected to the light emitting element;

[0006] The driving module is used to provide a driving voltage for the light-emitting element and feed the driving voltage back to the power output module; the power output module is used to provide an operating voltage for the driving module and control the voltage difference between the operating voltage and the driving voltage to be constant based on the acquired driving voltage.

[0007] In some embodiments, the power output module includes: a control unit and a power conversion unit;

[0008] The control unit is electrically connected to the power conversion unit; the control unit and the power conversion unit are electrically connected to the driving module respectively;

[0009] The control unit is used to obtain the driving voltage provided by the driving module to the light-emitting element, and adjust the working voltage output by the power conversion unit; the power conversion unit is used to provide the working voltage for the driving module.

[0010] In some embodiments, the driving module includes a plurality of power supply channels;

[0011] The input end of the power supply channel is electrically connected to the power output module; the output end of the power supply channel is electrically connected to the light emitting element, and the power supply channel supplies power to the light emitting element through the output end;

[0012] The control unit is used to obtain the minimum channel voltage of each power supply channel of the driving module, and adjust the working voltage provided by the power conversion unit based on the comparison result of the minimum channel voltage and the preset working voltage of the driving module;

[0013] The channel voltage is equal to the voltage difference between the working voltage and the driving voltage of the power supply channel.

[0014] In some embodiments, the control unit and the driving module communicate via a CAN bus; the control unit and the power conversion unit communicate via a SPI bus.

[0015] In a second aspect, the present disclosure further provides a light emitting element control method, which is applied to any of the light emitting element control circuits provided in the first aspect; the control method comprises:

[0016] Acquiring a driving voltage provided by the driving module to the light-emitting element;

[0017] A working voltage is provided to the driving module according to the driving voltage, and a voltage difference between the working voltage and the driving voltage is controlled to be constant.

[0018] In some embodiments, providing the driving module with an operating voltage according to the driving voltage further includes:

[0019] Obtaining the minimum channel voltage of each power supply channel of the driving module;

[0020] Based on the comparison result between the minimum channel voltage and the preset working voltage of the driving module, the working voltage provided by the power conversion unit is adjusted.

[0021] In some embodiments, adjusting the operating voltage provided by the power conversion unit based on the comparison result between the minimum channel voltage and the preset operating voltage of the driving module includes:

[0022] It is determined that the minimum channel voltage is greater than a preset operating voltage of the driving module, and the operating voltage provided by the power conversion unit is controlled to decrease.

[0023] In some embodiments, the preset operating voltage is greater than or equal to a required operating voltage of the driving module.

[0024] In some embodiments, obtaining the minimum channel voltage of each power supply channel of the driving module includes:

[0025] The channel voltage of each power supply channel of the driving module is determined based on the working voltage and the driving voltage, and the minimum channel voltage is determined.

[0026] In a third aspect, the present disclosure further provides an electronic device, comprising any light emitting element control circuit as provided in the first aspect.

[0027] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0028] The light-emitting element control circuit provided by the present disclosure includes a power output module and a driving module; the power output module and the driving module; the power output module is electrically connected to the driving module; the driving module is electrically connected to the light-emitting element. In the prior art, the power output module provides a constant working voltage for the driving module, but as the light-emitting element continues to be powered on and emit light, the driving voltage required by the light-emitting element will decrease, resulting in an increase in the voltage consumed by the driving module and an overly high temperature. In the embodiment of the present disclosure, the driving module will feed back the driving voltage of the light-emitting element to the power output module in real time, and the power output module will adjust the provided working voltage according to the requirements of the light-emitting element so that the voltage difference between the working voltage and the driving voltage is constant. Avoid the problem that the working voltage is too large, and the additional working voltage needs to be consumed on the driving module, resulting in the problem of overly high temperature of the driving module. In addition, there is no need to limit the light-emitting element path that is turned on by the driving module. Therefore, the embodiment of the present disclosure can improve the heating phenomenon of the driving module, reduce energy consumption, and can increase the number of light-emitting element channels turned on by the driving module, thereby improving the channel utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 A schematic diagram of the structure of a light emitting element control circuit provided in an embodiment of the present disclosure;

[0032] Figure 2 A schematic diagram of the structure of another light emitting element control circuit provided in an embodiment of the present disclosure;

[0033] Figure 3 A schematic diagram of the structure of another light emitting element control circuit provided in an embodiment of the present disclosure;

[0034] Figure 4 A schematic flow chart of a light emitting element control method provided in an embodiment of the present disclosure.

[0035] Among them, 10, power output module; 20, driving module; 30, light emitting element; 11, control unit; 12, power conversion unit. DETAILED DESCRIPTION

[0036] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0038] In the light-emitting element control circuit, the linear chip will provide voltage to the light-emitting element, and the temperature of the light-emitting element will gradually increase during the light-emitting process. Based on the characteristics of the light-emitting element itself, the voltage of the light-emitting element will decrease as the temperature increases, so the voltage provided to the light-emitting element by the linear chip will decrease. However, the voltage input to the linear chip is constant, and the voltage required by the light-emitting element is reduced, so the voltage consumed by the linear chip will increase. This will cause the linear chip to generate a lot of heat. In order to prevent the linear chip from being damaged due to excessive temperature, the only way is to limit the number of light-emitting element channels that the linear chip conducts, reduce the number of light-emitting elements, and limit the temperature of the linear chip to a safe range.

[0039] In view of the above-mentioned defects, the present disclosure provides a light emitting element control circuit. Figure 1 A schematic diagram of a light emitting element control circuit according to an embodiment of the present disclosure is provided. Figure 1 The light emitting element control circuit includes: a power output module 10 and a driving module 20. The power output module 10 is electrically connected to the driving module 20; and the driving module 20 is electrically connected to the light emitting element 30.

[0040] The driving module 20 is used to provide a driving voltage for the light emitting element 30 and feed the driving voltage back to the power output module 10. The power output module 10 is used to provide an operating voltage for the driving module 20 and control the voltage difference between the operating voltage and the driving voltage to be constant according to the acquired driving voltage.

[0041] Exemplarily, in the light emitting element control circuit, the power output module 10 is electrically connected to the driving module 20, and the power output module 10 provides the operating voltage to the driving module 20. The driving module 20 is electrically connected to the light emitting element 30, and the driving module 20 provides the required driving voltage to the light emitting element 30 according to the requirements of the light emitting element 30, so that the light emitting element 30 emits light. As the temperature of the light emitting element 30 changes, the voltage of the light emitting element 30 will also change. The voltage of the light emitting element mentioned here is equivalent to the driving voltage provided by the driving module 20 to the light emitting element 30, and therefore, the driving voltage changes with the temperature of the light emitting element 30.

[0042] The driving module 20 can obtain the driving voltage required by the light-emitting element 30 in real time, and feed the driving voltage back to the power output module 10. The power output module 10 adjusts the working voltage output to the driving module 20 according to the change of the driving voltage, so that the voltage difference between the two ends of the driving module 20 is constant, that is, the voltage difference between the received working voltage and the driving voltage provided to the light-emitting element 30 is constant. The voltage difference of the driving module 20 is constant, and the heat generated by the driving module 20 is constant, thereby avoiding excessive heat generation of the driving module 20 and reducing the loss rate and energy consumption of the driving module 20.

[0043] Usually, the driving module 20 includes a plurality of power supply channels for supplying power to the light-emitting element 30. To avoid heating of the driving module 20, the utilization rate of the power supply channels is limited. In the embodiment disclosed herein, the voltage difference between the two ends of the driving module 20 is constant, the temperature of the driving module 20 is constant, and the driving module 20 is not affected by the number of power supply channels that are turned on, and can supply power to the light-emitting element 30, thereby improving the channel utilization rate of the driving module 20.

[0044] In the embodiment of the present disclosure, the driving module will feed back the driving voltage of the light-emitting element to the power output module in real time, and the power output module will adjust the provided working voltage according to the requirements of the light-emitting element so that the voltage difference between the working voltage and the driving voltage is constant. This avoids the problem that the working voltage is too large, and additional working voltage needs to be consumed on the driving module, resulting in excessive temperature of the driving module. In addition, there is no need to limit the light-emitting element paths that are turned on by the driving module. Therefore, the embodiment of the present disclosure can improve the heating phenomenon of the driving module, reduce energy consumption, and can increase the number of channels turned on by the driving module, thereby improving the channel utilization rate.

[0045] In some embodiments, Figure 2 A schematic diagram of a light emitting element control circuit according to an embodiment of the present disclosure is provided. Figure 2 The power output module 10 includes: a control unit 11 and a power conversion unit 12 .

[0046] The control unit 11 is electrically connected to the power conversion unit 12 ; the control unit 11 and the power conversion unit 12 are electrically connected to the driving module 20 , respectively.

[0047] The control unit 11 is used to obtain the driving voltage provided by the driving module 20 to the light emitting element 30 and adjust the working voltage output by the power conversion unit 12 ; the power conversion unit 12 is used to provide the working voltage for the driving module 20 .

[0048] Exemplarily, the power output module 10 includes a control unit 11 and a power conversion unit 12, the power conversion unit 12 is electrically connected to the driving module 20, for example, the power conversion unit 12 is a DC-DC converter, and the DC-DC converter can adjust the DC power supply voltage to obtain the required working voltage. Then the power conversion unit 12 outputs the working voltage to the driving module 20 to make the driving module 20 work. The driving module 20 is electrically connected to the light-emitting element 30, and the driving module 20 controls the light-emitting element 30 to emit light under the action of the working voltage. Among them, the driving module 20 can be a linear chip, and after receiving the working voltage, the linear chip provides the driving voltage to each light-emitting element 30 according to its needs.

[0049] The driving module 20 is also electrically connected to the control unit 11, and the control unit 11 is electrically connected to the power conversion unit 12. For example, the control unit 11 includes an MCU (Micro Controller Unit). The driving module 20 can feed back the driving voltage of the light-emitting element 30 to the control unit 11 in real time. The control unit 11 receives the driving voltage required by the light-emitting element 30 fed back by the driving module 20 and judges the driving voltage. If the driving voltage of the light-emitting element 30 changes, the control unit 11 will control the power conversion unit 12 to adjust the operating voltage provided to the driving module 20 according to the change of the driving voltage. To ensure that the voltage difference between the operating voltage and the driving voltage of the driving module 20 always remains constant and is not affected by the change of the driving voltage of the light-emitting element 30. If the driving voltage received by the control unit 11 does not change, the power conversion unit 12 does not need to adjust the operating voltage provided to the driving module 20.

[0050] The control unit 11 can adjust the working voltage output by the power conversion unit 12 in real time by receiving the driving voltage of the light-emitting element 30 fed back by the driving module 20, so as to make the voltage difference between the two sections of the driving module 20 constant, thereby avoiding the driving module 20 from generating excessive heat.

[0051] It should be noted that the embodiments of the present disclosure do not limit the types of components included in each module. The above is only an example and can be set according to actual circuit requirements.

[0052] In some embodiments, Figure 3 A schematic diagram of a light emitting element control circuit according to an embodiment of the present disclosure is provided. Figure 3 , the driving module 20 includes multiple power supply channels.

[0053] The input end of the power supply channel is electrically connected to the power output module 10 ; the output end of the power supply channel is electrically connected to the light emitting element 30 , and the power supply channel supplies power to the light emitting element 30 through the output end.

[0054] The control unit 11 is used to obtain the minimum channel voltage of each power supply channel of the driving module 20 , and adjust the working voltage provided by the power conversion unit 12 based on the comparison result between the minimum channel voltage and the preset working voltage of the driving module 20 .

[0055] The channel voltage is equal to the voltage difference between the working voltage of the power supply channel and the driving voltage.

[0056] Exemplarily, the input end of the driving module 20 is electrically connected to the power output module, and the output end of the driving module 20 is electrically connected to the light emitting element 30. The driving module 20 includes multiple power supply channels, each of which can be controlled separately. It can be understood that the input end of each power supply channel is electrically connected to the power output module, and the output end of the power supply channel is electrically connected to the light emitting element 30. The driving module supplies power to the light emitting element 30 by supplying power to the output end of the power supply channel. For example Figure 3 The driving module 20 provided in the embodiment is a linear chip, including multiple power supply channels, such as LED2, LED3, ..., LED15, LED16, etc. Each power supply channel can be connected to a corresponding LED, such as a daytime running light or a turn signal light, and the number of LEDs connected to each power supply channel is determined according to actual electrical parameters.

[0057] There may be differences in the number, power, conduction time, etc. of LEDs connected to different power supply channels. Therefore, the driving voltage transmitted to the LED connected to each power supply channel is different, resulting in differences in the channel voltage of each power supply channel and different heating conditions. Among them, the channel voltage is equal to the voltage difference between the working voltage and the driving voltage of the power supply channel, that is, the voltage difference between the input terminal voltage and the output terminal voltage of the power supply channel. In order to make the channel voltage of each power supply channel meet the minimum heat generation, after obtaining the channel voltage of each power supply channel of the driving module, it is also necessary to determine the minimum channel voltage. And based on the comparison result between the minimum channel voltage and the preset working voltage of the driving module, adjust the working voltage provided by the power conversion unit. It can be understood that once the minimum channel voltage does not meet the preset working voltage, the working voltage provided by the power conversion unit is immediately adjusted to make the voltage difference between the two ends of the driving module constant and meet the current minimum heat generation requirement. Based on this, the channel voltage of each power supply channel can be controlled to be constant, that is, to meet the requirements of the preset working voltage and the minimum heat generation.

[0058] For example, when the driving voltage of the light-emitting element is reduced, the channel voltage of the power supply channel will increase, resulting in an increase in the heat generated by the linear chip. The minimum channel voltage among the channel voltages is obtained. If the minimum channel voltage is greater than the preset working voltage, the working voltage provided by the power conversion unit is reduced so that the channel voltage of the power supply channel is relatively stable and maintained within a certain range, so that the voltage difference between the working voltage and the output voltage of the driving module is constant and the heat generation is minimized.

[0059] In some embodiments, continue to refer to Figure 2 The control unit 11 and the driving module 20 communicate via the CAN bus; the control unit 11 and the power conversion unit 12 communicate via the SPI bus.

[0060] Exemplarily, the control unit 11 needs to receive the driving voltage of the light-emitting element 30 fed back by the driving module 20, and the control unit 11 and the driving module 20 can communicate through the CAN (Controller Area Network) bus. Among them, a CAN transceiver is provided in the control unit 11 and the driving module 20 to complete the information feedback. The CAN bus communication adopts a two-wire serial communication mode, which has strong error detection capability, large data transmission volume, and can work in a high noise interference environment. It should be noted that only a single line is illustrated in the accompanying drawings, but the actual structure is a two-wire communication. The control unit 11 and the power conversion unit 12 communicate through the SPI (Serial Peripheral Interface) bus. The SPI bus communication speed is fast, so the control unit 11 can quickly control the power conversion unit 12 to adjust the operating voltage provided to the driving module 20 to avoid the heating of the driving module 20.

[0061] It should be noted that the embodiments of the present disclosure do not specifically limit the communication method between the above-mentioned parts, which is only used as a feasible implementation method. Other communication methods can be selected for data transmission according to actual needs.

[0062] The embodiments of the present disclosure further provide a light emitting element control method, which is applied to the light emitting element control circuit of any of the above embodiments. Figure 4 A schematic diagram of a light emitting element control method provided in an embodiment of the present disclosure, referring to Figure 4 , the light emitting element control method includes S110-S120:

[0063] S110, obtaining a driving voltage provided by a driving module to a light-emitting element.

[0064] For example, the driving module in the light-emitting element driving circuit provides the required driving voltage to the light-emitting element according to the needs of the light-emitting element, so that the light-emitting element emits light. However, as the temperature of the light-emitting element changes, the voltage of the light-emitting element will also change, that is, the driving voltage changes with the temperature of the light-emitting element. The power output module is electrically connected to the driving module, so that the power output module can obtain the driving voltage provided by the driving module to the light-emitting element in real time and detect the driving voltage.

[0065] S120 , providing a working voltage to the driving module according to the driving voltage, and controlling the voltage difference between the working voltage and the driving voltage to be constant.

[0066] If the driving voltage required by the light-emitting element changes, for example, the driving voltage decreases, and the working voltage of the driving module remains unchanged, then the voltage difference between the working voltage of the driving module and the driving voltage will increase. The driving module will generate a lot of heat, which will affect the life of the driving module. In order to avoid the above situation, the voltage difference between the working voltage of the driving module and the driving voltage should be avoided from increasing, and it should be kept constant as much as possible. The power output module is electrically connected to the driving module, and the power output module can adjust the working voltage provided to the driving module according to the received driving voltage, so as to control the voltage difference between the working voltage and the driving voltage to be constant, or stabilized within a certain range. The voltage at both ends of the driving module is constant, and the heat generated is constant, which can avoid excessive heat generation of the driving module and reduce the loss rate and energy consumption of the driving module.

[0067] In addition, the driver module usually includes multiple power supply channels for supplying power to the light-emitting elements. In order to avoid heating of the driver module, the utilization rate of the power supply channels is limited. In the embodiment disclosed in the present invention, the voltage difference between the two ends of the driver module is constant, the temperature of the driver module is constant, and the driver module is not affected by the number of power supply channels that are turned on, and can supply power to the light-emitting elements, thereby improving the channel utilization rate of the driver module.

[0068] In some embodiments, providing a working voltage to a driving module according to a driving voltage further includes:

[0069] Get the minimum channel voltage of each power supply channel of the driver module.

[0070] Exemplarily, the driving module includes multiple power supply channels, each of which can be controlled separately. The driving module supplies power to the light-emitting element through the output end of the power supply channel. The number, power, conduction time, etc. of the light-emitting elements connected to different power supply channels may be different, so the driving voltage transmitted to the light-emitting element connected to it by each power supply channel is different, resulting in differences in the channel voltages of each power supply channel. In order to ensure that the channel voltages of each power supply channel meet the minimum heat generation condition, after obtaining the channel voltages of each power supply channel of the driving module, it is also necessary to determine the minimum channel voltage for subsequent processing.

[0071] Based on the comparison result between the minimum channel voltage and the preset working voltage of the driving module, the working voltage provided by the power conversion unit is adjusted.

[0072] The minimum channel voltage is compared with the preset working voltage of the driving module, wherein satisfying the preset working voltage means that the driving voltage provided by the power supply channel can normally drive the light-emitting element, so that the light-emitting element emits light, and the heat generated is minimal. Therefore, if there is a difference between the minimum channel voltage and the preset working voltage of the driving module, the channel voltage needs to be adjusted according to the actual situation. Furthermore, the control unit adjusts the working voltage provided by the power conversion unit to the driving module to adjust the channel voltage so that the minimum channel voltage meets the requirements of the preset working voltage. If the minimum channel voltage meets the preset working voltage, there is no need to adjust the current working voltage, and the current operating state can be maintained.

[0073] The driving module includes multiple power supply channels. By repeating the above operations, the channel voltage of each power supply channel can meet the preset working voltage, so that the heat generated by each power supply channel can be relatively low, thereby improving the heating condition of the driving module.

[0074] In some embodiments, adjusting the operating voltage provided by the power conversion unit based on a comparison result between the minimum channel voltage and a preset operating voltage of the driving module includes:

[0075] It is determined that the minimum channel voltage is greater than the preset working voltage of the driving module, and the working voltage provided by the power conversion unit is controlled to decrease.

[0076] Specifically, if it is determined that the minimum channel voltage is greater than the preset working voltage of the driving module, it means that the power supply channel is seriously heating up, and the control unit needs to control the working voltage provided by the power conversion unit to be reduced. The working voltage of the driving module is reduced, which can reduce the channel voltage and make it meet the preset working voltage to achieve the minimum heat generation. Based on this, once the minimum channel voltage is greater than the preset working voltage of the driving module, the channel voltage can be adjusted in time to reduce the working voltage and improve the heating situation. For example, the preset working voltage is 0.7V and the minimum channel voltage is 0.8V. At this time, it is necessary to control the power conversion unit to reduce the output working voltage so that the minimum channel voltage is reduced.

[0077] Optionally, it is determined that the minimum channel voltage is greater than a preset operating voltage of the driving module, and the operating voltage provided by the power conversion unit is controlled to be increased.

[0078] If it is determined that the minimum channel voltage is less than the preset working voltage of the driving module, the power supply channel cannot be driven and the light-emitting element cannot be powered. Therefore, the control unit needs to control the power conversion unit to increase the output working voltage to ensure that the light-emitting element can emit light normally. For example, the preset working voltage is 0.7V and the minimum channel voltage is 0.6V. At this time, it is necessary to control the power conversion unit to increase the output working voltage to increase the minimum channel voltage.

[0079] In some embodiments, the preset working voltage is greater than or equal to the working required voltage of the driving module.

[0080] Taking the example of a driving module including a linear chip, the normal operation of the linear chip should meet its working voltage requirement. If the working voltage requirement is not met, the linear chip cannot drive the light-emitting element. Therefore, when setting the preset working voltage, it should be greater than or equal to the working voltage requirement of the driving module. Avoid the situation where the voltage is too low and the circuit cannot work normally. In some optional embodiments, the preset working voltage is the channel voltage corresponding to the normal operation of the driving module and the lowest heat generation of the power supply channel.

[0081] In some embodiments, obtaining the minimum channel voltage of each power supply channel of the driving module includes:

[0082] The channel voltage of each power supply channel of the driving module is determined based on the working voltage and the driving voltage, and the minimum channel voltage is determined.

[0083] Specifically, the driving module includes multiple power supply channels, each of which can be controlled separately. It can be understood that the input end of each power supply channel is electrically connected to the power output module, and the output end of the power supply channel is electrically connected to the light-emitting element. The driving module supplies power to the light-emitting element by supplying power to the output end of the power supply channel. The channel voltage of the power supply channel is equal to the voltage difference between the working voltage of the power supply channel and the driving voltage. Therefore, the channel voltage of each power supply channel can be obtained, and further, the minimum channel voltage can be determined therefrom.

[0084] The embodiment of the present disclosure also provides an electronic device, including the light emitting element control circuit described in any of the above embodiments. Since the embodiment of the present disclosure includes the light emitting element control circuit in any of the above embodiments, it has the same or corresponding beneficial effects as the light emitting element control circuit described in each of the above embodiments. It should be noted that the electronic device provided by the embodiment of the present disclosure may also include other circuits and devices for supporting its normal operation, and this embodiment does not specifically limit this.

[0085] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0086] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A light emitting element control circuit, characterized in that: include: Power output module and drive module; The power output module is electrically connected to the driving module; The driving module is electrically connected to the light emitting element; The driving module is used to provide a driving voltage for the light emitting element and feed the driving voltage back to the power output module; The power output module is used to provide a working voltage for the driving module, and to control a voltage difference between the working voltage and the driving voltage to be constant according to the acquired driving voltage.

2. The light emitting element control circuit according to claim 1, characterized in that: The power output module includes: a control unit and a power conversion unit; The control unit is electrically connected to the power conversion unit; the control unit and the power conversion unit are electrically connected to the driving module respectively; The control unit is used to obtain the driving voltage provided by the driving module to the light-emitting element, and adjust the working voltage output by the power conversion unit; the power conversion unit is used to provide the working voltage for the driving module.

3. The light emitting element control circuit according to claim 2, characterized in that: The driving module includes a plurality of power supply channels; The input end of the power supply channel is electrically connected to the power output module; the output end of the power supply channel is electrically connected to the light emitting element, and the power supply channel supplies power to the light emitting element through the output end; The control unit is used to obtain the minimum channel voltage of each power supply channel of the driving module, and adjust the working voltage provided by the power conversion unit based on the comparison result of the minimum channel voltage and the preset working voltage of the driving module; The channel voltage is equal to the voltage difference between the working voltage and the driving voltage of the power supply channel.

4. The light emitting element control circuit according to claim 2, characterized in that: The control unit communicates with the drive module via a CAN bus; the control unit communicates with the power conversion unit via a SPI bus.

5. A light emitting element control method, characterized in that: Applicable to the light emitting element control circuit according to any one of claims 1 to 4; the control method comprises: Acquiring a driving voltage provided by the driving module to the light-emitting element; A working voltage is provided to the driving module according to the driving voltage, and a voltage difference between the working voltage and the driving voltage is controlled to be constant.

6. The control method according to claim 5, characterized in that: The providing the operating voltage to the driving module according to the driving voltage further includes: Obtaining the minimum channel voltage of each power supply channel of the driving module; Based on the comparison result between the minimum channel voltage and the preset working voltage of the driving module, the working voltage provided by the power conversion unit is adjusted.

7. The control method according to claim 6, characterized in that: The adjusting the operating voltage provided by the power conversion unit based on the comparison result between the minimum channel voltage and the preset operating voltage of the driving module includes: It is determined that the minimum channel voltage is greater than a preset operating voltage of the driving module, and the operating voltage provided by the power conversion unit is controlled to decrease.

8. The control method according to claim 7, characterized in that: The preset working voltage is greater than or equal to the working required voltage of the driving module.

9. The control method according to claim 6, characterized in that: The obtaining of the minimum channel voltage of each power supply channel of the driving module includes: The channel voltage of each power supply channel of the driving module is determined based on the working voltage and the driving voltage, and the minimum channel voltage is determined.

10. An electronic device, characterized in that: The invention comprises a light emitting element control circuit as described in any one of claims 1 to 4.

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