High-precision dimming device and dimmable lighting device
By combining a microprocessor and a clock signal calibration module, and using a 48MHz clock signal for calibration and adjustment, the problem of insufficient brightness adjustment accuracy of the dimming device was solved, and high-precision lamp brightness control was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INTMAN LIGHTING ELECTRONICS (CHANGZHOU) CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-21
AI Technical Summary
Existing dimming devices suffer from insufficient brightness adjustment accuracy due to unstable clock signals, which affects the brightness control effect of lighting equipment.
By employing a combination of a microprocessor, an interaction module, a clock signal calibration module, and a driver module, and through calibration and real-time adjustment using a 48MHz clock signal, the accuracy of the PWM signal is ensured, thereby achieving high-precision brightness control of the light-emitting element.
It achieves stepless brightness adjustment of lighting equipment, overcomes the influence of external factors on clock signals, and ensures high precision in brightness adjustment of lamps.
Smart Images
Figure CN224538371U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lighting device technology, specifically relating to components of lighting devices, and particularly to a high-precision dimming device and a dimming lighting equipment. Background Technology
[0002] Dimming devices require the controller to output a PWM signal to achieve stepless adjustment of the lamp brightness. However, the accuracy of the PWM signal is affected by the clock signal, and the heat generated by the lamp during operation will affect the temperature of the crystal, causing the output frequency of the voltage-controlled crystal oscillator to change with these factors. If the clock signal generated by the voltage-controlled crystal oscillator is unstable or inaccurate, it will affect the accuracy of the lamp brightness adjustment.
[0003] Therefore, there is an urgent need to develop a new high-precision dimming device and dimmable lighting equipment to solve the technical problem of the dimming device affecting the brightness adjustment accuracy of the lamp due to the influence of the clock signal.
[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content
[0005] This disclosure provides at least one high-precision dimming device and a dimmable lighting device.
[0006] In a first aspect, embodiments of this disclosure provide a high-precision dimming device, comprising: a microprocessor, an interaction module, a clock signal calibration module, and a driving module; wherein the interaction module, the clock signal calibration module, and the driving module are electrically connected to the microprocessor; the interaction module is configured to send a brightness adjustment signal to the microprocessor; the microprocessor is configured to acquire a calibrated 48MHz clock signal through the clock signal calibration module; and the microprocessor is further configured to generate a corresponding PWM signal to the driving module based on the brightness adjustment signal and the 48MHz clock signal, so as to adjust the brightness of the light-emitting element.
[0007] In one alternative implementation, the interaction module includes: a potentiometer; the potentiometer is electrically connected to the microprocessor; the potentiometer is configured to send a brightness adjustment signal to the microprocessor.
[0008] In one optional embodiment, the clock signal calibration module includes: a reference clock signal unit and a calibration unit; wherein the reference clock signal unit and the calibration unit are electrically connected to a microprocessor; the microprocessor is configured to acquire a reference clock signal through the reference clock signal unit; the calibration unit is configured to output a 48MHz clock signal to the microprocessor, and the microprocessor is configured to calibrate the 48MHz clock signal according to the reference clock signal, and the microprocessor feeds back a corresponding adjustment signal to the calibration unit, so that the calibration unit re-outputs the calibrated 48MHz clock signal to the microprocessor after calibration according to the adjustment signal.
[0009] In one optional implementation, the reference clock signal unit includes: a GPS / BeiDou chip; the GPS / BeiDou chip is electrically connected to a microprocessor; the GPS / BeiDou chip is configured to acquire a reference clock signal and send it to the microprocessor.
[0010] In one alternative implementation, the GPS / BeiDou chip is electrically connected to a GPS antenna or a BeiDou antenna.
[0011] In one optional embodiment, the calibration unit includes: a 48MHz voltage-controlled crystal oscillator, an analog-to-digital converter (ADC), and a digital-to-analog converter (DAC); the ADC and DAC are electrically connected to a microprocessor, and the 48MHz voltage-controlled crystal oscillator is electrically connected to the ADC and DAC; the 48MHz voltage-controlled crystal oscillator is configured to output a 48MHz clock signal to the microprocessor via the ADC; the microprocessor is configured to feed back a corresponding adjustment signal to the 48MHz voltage-controlled crystal oscillator via the DAC to adjust the output frequency of the 48MHz voltage-controlled crystal oscillator, i.e., the 48MHz voltage-controlled crystal oscillator outputs a calibrated 48MHz clock signal to the microprocessor via the ADC.
[0012] In one optional implementation, the driving module includes: a MOS driving transistor; the MOS driving transistor is electrically connected to a microprocessor; the microprocessor is configured to generate a corresponding PWM signal to the MOS driving transistor to adjust the brightness of the light-emitting element.
[0013] Secondly, embodiments of this disclosure also provide a dimmable lighting device, comprising: a high-precision dimming device and a light-emitting element; wherein the high-precision dimming device is electrically connected to the light-emitting element; and the high-precision dimming device is configured to adjust the brightness of the light-emitting element.
[0014] In one alternative implementation, a high-precision dimming device as described above is used.
[0015] The beneficial effects of this invention are that by selecting a 48MHz clock signal, the output accuracy of the drive module can be ensured, and by adjusting the 48MHz clock signal in real time through the clock signal calibration module, the influence of external factors on the clock signal can be overcome, ensuring that the microprocessor controls the drive module to drive the light-emitting element to work with a high-precision PWM signal, thereby realizing stepless adjustment of the brightness of the lighting equipment.
[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.
[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 A schematic block diagram of a high-precision dimming device provided in this embodiment of the present disclosure;
[0020] Figure 2 A circuit diagram of a high-precision dimming device provided in an embodiment of this disclosure.
[0021] In the picture:
[0022] U1, Microprocessor; U2, GPS / BeiDou chip; U3, 48MHz voltage-controlled crystal oscillator; U4, Analog-to-digital converter; U5, Digital-to-analog converter. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0024] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.
[0025] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0028] like Figures 1 to 2 As shown, at least one embodiment provides a high-precision dimming device, which includes: a microprocessor U1, an interaction module, a clock signal calibration module, and a drive module; wherein the interaction module, the clock signal calibration module, and the drive module are electrically connected to the microprocessor U1; the interaction module is configured to send a brightness adjustment signal to the microprocessor U1; the microprocessor U1 is configured to acquire a calibrated 48MHz clock signal through the clock signal calibration module; and the microprocessor U1 is further configured to generate a corresponding PWM signal to the drive module based on the brightness adjustment signal and the 48MHz clock signal, so as to adjust the brightness of the light-emitting element.
[0029] In at least one embodiment, by selecting a 48MHz clock signal, the output accuracy of the drive module can be ensured, and by adjusting the 48MHz clock signal in real time through the clock signal calibration module, the influence of external factors on the clock signal can be overcome, ensuring that the microprocessor U1 controls the drive module to drive the light-emitting element to work with a high-precision PWM signal, thereby realizing stepless adjustment of the brightness of the lighting device.
[0030] In at least one embodiment, please refer to Figure 1 The interaction module includes a potentiometer; the potentiometer is electrically connected to the microprocessor U1; the potentiometer is configured to send a brightness adjustment signal to the microprocessor U1.
[0031] Specifically, the potentiometer is a rotary potentiometer, and the microprocessor U1 obtains the brightness adjustment signal by reading the voltage of the potentiometer in real time.
[0032] In at least one embodiment, please refer to Figure 2 The clock signal calibration module includes a reference clock signal unit and a calibration unit; wherein the reference clock signal unit and the calibration unit are electrically connected to the microprocessor U1; the microprocessor U1 is configured to acquire a reference clock signal through the reference clock signal unit; the calibration unit is configured to output a 48MHz clock signal to the microprocessor U1, and the microprocessor U1 is configured to calibrate the 48MHz clock signal according to the reference clock signal, and the microprocessor U1 feeds back a corresponding adjustment signal to the calibration unit, so that the calibration unit re-outputs the calibrated 48MHz clock signal to the microprocessor U1 after calibration according to the adjustment signal.
[0033] In at least one embodiment, please refer to Figure 2 The reference clock signal unit includes: a GPS / BeiDou chip U2; the GPS / BeiDou chip U2 is electrically connected to the microprocessor U1; the GPS / BeiDou chip U2 is configured to acquire a reference clock signal and send it to the microprocessor U1.
[0034] Specifically, please refer to Figure 2 The GPS / BeiDou chip U2 can be, but is not limited to, the GNS1301B global navigation and positioning chip.
[0035] In at least one embodiment, please refer to Figure 2 The GPS / BeiDou chip U2 is electrically connected to the GPS antenna or the BeiDou antenna.
[0036] Specifically, the GPS / BeiDou chip U2 outputs a high-precision pulse-per-second (PPS), which is input to the microprocessor U1 as a reference clock signal for the calibration unit.
[0037] In at least one embodiment, please refer to Figure 2 The calibration unit includes a 48MHz voltage-controlled crystal oscillator U3, an analog-to-digital converter (ADC) U4, and a digital-to-analog converter (DAC) U5. The ADC U4 and DAC U5 are electrically connected to a microprocessor U1. The 48MHz voltage-controlled crystal oscillator U3 is electrically connected to the ADC U4 and DAC U5. The 48MHz voltage-controlled crystal oscillator U3 is configured to output a 48MHz clock signal to the microprocessor U1 via the ADC U4. The microprocessor U1 is configured to feed back a corresponding adjustment signal to the 48MHz voltage-controlled crystal oscillator U3 via the DAC U5 to adjust the output frequency of the 48MHz voltage-controlled crystal oscillator U3. In other words, the 48MHz voltage-controlled crystal oscillator U3 outputs a calibrated 48MHz clock signal to the microprocessor U1 via the ADC U4.
[0038] Specifically, please refer to Figure 2 The analog-to-digital converter U4 can use, but is not limited to, the NC7WZU04P6X converter chip.
[0039] Specifically, please refer to Figure 2 The digital-to-analog converter U5 can be, but is not limited to, the MS5541M digital-to-analog converter U5.
[0040] Specifically, the calibration unit uses a high-precision pulse-per-second (PPS) as the reference clock signal to monitor the 48MHz clock signal output by the 48MHz voltage-controlled crystal oscillator U3 in real time, and works with the microprocessor U1 to adjust the voltage control voltage of the 48MHz voltage-controlled crystal oscillator U3 based on the reference clock signal, so that the 48MHz voltage-controlled crystal oscillator U3 outputs a high-precision 48MHz clock signal.
[0041] Specifically, the accuracy of the 48MHz clock signal output frequency can be adjusted by changing the 48MHz voltage-controlled crystal oscillator U3.
[0042] Specifically, the digital-to-analog converter U5 outputs an analog voltage to adjust the output frequency of the 48MHz voltage-controlled crystal oscillator U3. The digital-to-analog converter U5 is connected to the microprocessor U1, enabling the microprocessor U1 to control the voltage output of the digital-to-analog converter U5.
[0043] Specifically, the microprocessor U1 uses the reference clock signal as a reference to perform statistical analysis on the 48MHz clock signal. If the error exceeds the threshold (i.e., the 48MHz clock signal error is large), the output voltage of the digital-to-analog converter U5 is adjusted to regulate the 48MHz clock signal until the output error of the 48MHz clock signal is less than the expected value.
[0044] In at least one embodiment, please refer to Figure 2The driving module includes a MOS driving transistor; the MOS driving transistor is electrically connected to the microprocessor U1; the microprocessor U1 is configured to generate a corresponding PWM signal to the MOS driving transistor to adjust the brightness of the light-emitting element.
[0045] Specifically, the microprocessor U1 linearly maps the 0-3.3V input to the 0-10V output, and supports 0.1% precision dimming in conjunction with the clock signal calibration module.
[0046] Specifically, the microprocessor U1 adjusts the duty cycle of the PWM signal based on the mapping value to drive the MOS drive transistor to achieve smooth, flicker-free dimming.
[0047] Based on the same technical concept, at least one embodiment also provides a dimmable lighting device, which includes: a high-precision dimming device and a light-emitting element; wherein the high-precision dimming device is electrically connected to the light-emitting element; and the high-precision dimming device is configured to adjust the brightness of the light-emitting element.
[0048] In at least one embodiment, a high-precision dimming device as described above is employed.
[0049] In summary, this invention ensures the output accuracy of the drive module by selecting a 48MHz clock signal, and by adjusting the 48MHz clock signal in real time through a clock signal calibration module, it overcomes the influence of external factors on the clock signal, ensuring that the microprocessor controls the drive module to drive the light-emitting element with a high-precision PWM signal, thereby achieving stepless brightness adjustment of the lighting equipment.
[0050] The term "data processing unit" or "data processing apparatus" includes all means, devices, and machines for processing data, including, for example, programmable processors, computers, or multiprocessors or computer groups. The propagated signal is a man-made signal, such as a machine-generated electrical, optical, or electromagnetic signal, which is generated to encode information for transmission to a suitable receiver device.
[0051] While this patent document contains numerous details, it should not be construed as limiting any utility model or the scope of the claims, but rather as a description of features of a particular embodiment of a particular utility model. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various functions described in the context of a single embodiment may also be implemented individually in multiple embodiments, or in any suitable sub-combination. Furthermore, although the foregoing features may be described as functioning in certain combinations, or even initially claimed to be so, in some cases one or more features from a combination of claims may be removed from the combination, and a combination of claims may refer to a sub-combination or a variation of a sub-combination.
[0052] Similarly, although the operations are described in a specific order in the accompanying drawings, this should not be construed as requiring the specific order or sequence shown to perform such operations, or all the described operations, in order to obtain the desired result. Furthermore, the separation of various system components in the embodiments of this patent document should not be construed as requiring such separation in all embodiments.
[0053] Only some implementations and examples are described; other implementations, enhancements, and variations can be made based on the content described and illustrated in this patent document.
[0054] When no intermediate component exists other than a line, trace, or other medium between the first and second components, the first component is directly coupled to the second component. When an intermediate component other than a line, trace, or other medium exists between the first and second components, the first component is indirectly coupled to the second component. The term "coupling" and its variations include direct coupling and indirect coupling. Unless otherwise stated, the term "about" is used to mean a range including upper and lower 10% of the value.
[0055] While several embodiments are provided in this disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of this disclosure. The present examples are intended to be illustrative rather than restrictive and are not limited to the details given. For example, various elements or components may be combined or integrated into another system, or certain features may be omitted or not implemented.
[0056] In the several embodiments provided herein, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.
[0057] Furthermore, without departing from the scope of this disclosure, the discrete or individual technologies, systems, subsystems, and methods described and illustrated in the various embodiments may be combined or integrated with other systems, modules, technologies, or methods. Other items shown or discussed as coupled may be directly connected or indirectly coupled or communicated via some interface, device, or intermediate component in an electrical, mechanical, or other manner. Those skilled in the art can identify other examples of changes, substitutions, and modifications without departing from the spirit and scope of this disclosure.
Claims
1. A high-precision dimming device, characterized in that, include: Microprocessor (U1), interaction module, clock signal calibration module, and driver module; in The interaction module, clock signal calibration module, and drive module are electrically connected to the microprocessor (U1); The interaction module is configured to send a brightness adjustment signal to the microprocessor (U1); The microprocessor (U1) is configured to acquire a calibrated 48MHz clock signal via a clock signal calibration module; and The microprocessor (U1) is also configured to generate a corresponding PWM signal to the drive module based on the brightness adjustment signal and the 48MHz clock signal, so as to adjust the brightness of the light-emitting element.
2. The high-precision dimming device as described in claim 1, characterized in that, The interaction module includes: a potentiometer; The potentiometer is electrically connected to the microprocessor (U1); The potentiometer is configured to send a brightness adjustment signal to the microprocessor (U1).
3. The high-precision dimming device as described in claim 1, characterized in that, The clock signal calibration module includes: a reference clock signal unit and a calibration unit; wherein... The reference clock signal unit and calibration unit are electrically connected to the microprocessor (U1); The microprocessor (U1) is configured to acquire a reference clock signal via a reference clock signal unit; The calibration unit is configured to output a 48MHz clock signal to the microprocessor (U1), and the microprocessor (U1) is configured to calibrate the 48MHz clock signal according to the reference clock signal, and the microprocessor (U1) feeds back a corresponding adjustment signal to the calibration unit so that the calibration unit re-outputs the calibrated 48MHz clock signal to the microprocessor (U1) after calibration according to the adjustment signal.
4. The high-precision dimming device as described in claim 3, characterized in that, The reference clock signal unit includes: a GPS / BeiDou chip (U2); The GPS / BeiDou chip (U2) is electrically connected to the microprocessor (U1); The GPS / BeiDou chip (U2) is configured to acquire a reference clock signal and send it to the microprocessor (U1).
5. The high-precision dimming device as described in claim 4, characterized in that, The GPS / BeiDou chip (U2) is electrically connected to the GPS antenna or the BeiDou antenna.
6. The high-precision dimming device as described in claim 3, characterized in that, The calibration unit includes: a 48MHz voltage-controlled crystal oscillator (U3), an analog-to-digital converter (U4), and a digital-to-analog converter (U5); The analog-to-digital converter (U4) and digital-to-analog converter (U5) are electrically connected to the microprocessor (U1), and the 48MHz voltage-controlled crystal oscillator (U3) is electrically connected to the analog-to-digital converter (U4) and digital-to-analog converter (U5). The 48MHz voltage-controlled crystal oscillator (U3) is configured to output a 48MHz clock signal to the microprocessor (U1) via an analog-to-digital converter (U4); The microprocessor (U1) is configured to feed back a corresponding adjustment signal to the 48MHz voltage-controlled crystal oscillator (U3) via a digital-to-analog converter (U5) to adjust the output frequency of the 48MHz voltage-controlled crystal oscillator (U3). That is, the 48MHz voltage-controlled crystal oscillator (U3) outputs a calibrated 48MHz clock signal to the microprocessor (U1) via an analog-to-digital converter (U4).
7. The high-precision dimming device as described in claim 1, characterized in that, The driving module includes: a MOS driving transistor; The MOS driving transistor is electrically connected to the microprocessor (U1); The microprocessor (U1) is configured to generate a corresponding PWM signal to the MOS driver transistor to adjust the brightness of the light-emitting element.
8. A dimmable lighting device, characterized in that, include: The high-precision dimming device and light-emitting element as described in any one of claims 1-7 are used; in The high-precision dimming device is electrically connected to the light-emitting element; The high-precision dimming device is configured to adjust the brightness of the light-emitting element.