Single-key color-adjusting and light-adjusting LED lighting device

Abstract

A single-key color-adjusting and light-adjusting LED lighting device comprises a control panel, a key knob assembly and a light-emitting module. The control board is provided with a microcontroller unit control circuit, and the microcontroller unit control circuit is provided with a variable resistor and a switch. The button knob switch is arranged on the control board and is electrically connected with the microcontroller unit control circuit. The key knob switch comprises a rotating shaft and a knob. The rotating shaft connects the variable resistor and the switch. The knob fixes the rotating shaft and is configured to be pressed or pulled out and rotate. When the knob drives the rotating shaft to rotate, the rotating shaft is configured to enable the knob to adjust the resistance value of the variable resistor through stepless rotation of the variable resistor. The light-emitting module is provided with a first pulse width modulation control constant current circuit, a second pulse width modulation control constant current circuit, a first light-emitting diode and a second light-emitting diode. According to the design, the brightness and color temperature adjustment of the light-emitting module can be realized.

Description

Technical Field

[0001] This disclosure relates to a single-key tuned LED lighting device, and more particularly to an LED single-key tuned LED lighting device. Background Technology

[0002] Light-emitting diode (LED) lights are popular among consumers due to their energy-saving and environmentally friendly characteristics, soft and uniform light, and diverse colors. With the development of LED technology, more and more types of lighting fixtures use LEDs as their light source. Generally, the brightness of an LED can be changed by varying the current flowing through it; for example, a higher current results in higher brightness, and a lower current results in lower brightness. However, as consumer demands become increasingly diverse, the conventional design that only adjusts the brightness of the lighting fixture is no longer sufficient.

[0003] While dimmable lighting devices are available, such as those using a microcontroller unit (MCU) connected to a rotary encoder, allowing the MCU to determine the encoder's rotation direction by the phase difference between two sets of signals generated by the encoder, this design requires three pins on the MCU. Furthermore, the pin connected to one of the signal sets must have interrupt functionality to correctly determine the direction. Additionally, the rotary encoder itself is designed to rotate indefinitely in the same direction, making it impossible for the user to determine whether the current brightness has reached its maximum or minimum unless they directly observe the light. Utility Model Content

[0004] According to some embodiments disclosed herein, a single-button adjustable color-changing LED lighting device includes a control board, a button / knob assembly, and a light-emitting module. The control board has a microcontroller unit control circuit, which includes a variable resistor and a switch. The button / knob assembly is disposed on the control board and electrically connected to the microcontroller unit control circuit. The button / knob switch includes a shaft and a knob. The shaft is connected to the variable resistor and the switch. The knob fixes the shaft and is configured for pressing or pulling out, and for rotation. When the knob drives the shaft to rotate, the shaft is configured to adjust the resistance value of the variable resistor by steplessly rotating the knob via the variable resistor. The light-emitting module includes a first pulse width modulation (PWM) control constant current circuit, a second PWM control constant current circuit, a first light-emitting diode (LED), and a second LED. The first PWM control constant current circuit is electrically connected to the microcontroller unit control circuit and the first LED. The second PWM control constant current circuit is electrically connected to the microcontroller unit control circuit and the second LED.

[0005] In some implementations, the aforementioned light-emitting modules are located outside the control board and are separate from each other.

[0006] In some embodiments, the control board further includes an electromagnetic interference (EMI) protection circuit. The EMI protection circuit is electrically connected to a power supply.

[0007] In some embodiments, the control board further includes a rectifier and filter circuit. The rectifier and filter circuit is electrically connected to the electromagnetic interference protection circuit, the first pulse width modulation control constant current circuit, and the second pulse width modulation control constant current circuit.

[0008] In some embodiments, the control board further includes a DC constant voltage power supply circuit. The DC constant voltage power supply circuit is electrically connected to the rectifier filter circuit and the microcontroller unit control circuit.

[0009] In some embodiments, the knob is configured to be pressed or pulled out in one direction, which is the axial direction of the pivot.

[0010] In some implementations, the direction in which the knob is pressed or pulled is the normal direction of the control panel.

[0011] In some embodiments, the color temperature of the first light-emitting diode is different from that of the second light-emitting diode. The color temperature of the first light-emitting diode is in the range of 2500K to 3500K, and the color temperature of the second light-emitting diode is in the range of 5500K to 6500K.

[0012] In some implementations, the light-emitting module is configured to emit light with a color temperature in the range of 2700K to 6500K.

[0013] In some implementations, the angle range is from 0 degrees to 180 degrees.

[0014] In the above-disclosed embodiment, the single-button color-changing LED lighting device has a button and knob assembly on the control board, a microcontroller unit control circuit with a variable resistor and a switch, and a light-emitting module with a first pulse width modulation control constant current circuit electrically connected to the microcontroller unit control circuit and the first light-emitting diode, and a second pulse width modulation control constant current circuit electrically connected to the microcontroller unit control circuit and the second light-emitting diode. Therefore, when using the single-button color-changing LED lighting device, the user can operate the button and knob assembly to cause the microcontroller unit control circuit to generate corresponding two pulse width modulation signals according to the resistance value of the variable resistor and the state of the switch. In this way, the output current through the first light-emitting diode and the output current through the second light-emitting diode can be controlled to adjust the brightness and color temperature of the light-emitting module. Attached Figure Description

[0015] When accompanied by Figure 1When reading this document, the best understanding of its contents can be obtained from the embodiments described below. Note that, according to standard industry practice, the various features are not drawn to scale. In fact, the dimensions of the various features can be increased or decreased arbitrarily for clarity of explanation.

[0016] Figure 1 A block diagram illustrating a single-key color-tuning LED lighting device according to an embodiment of the present disclosure;

[0017] Figure 2 Draw Figure 1 A 3D view of the control panel and button / knob assembly;

[0018] Figure 3 Draw Figure 1 The circuit diagram of the control board;

[0019] Figure 4 Draw Figure 1 The circuit diagram of the light-emitting module;

[0020] Figure 5A Draw Figure 1 The circuit diagram of the microcontroller unit control circuit, the first pulse width modulation control constant current circuit, the second pulse width modulation control constant current circuit, the first light-emitting diode and the second light-emitting diode.

[0021] Figure 5B Draw Figure 5A A magnified view of the switch and variable resistor;

[0022] Figure 5C Draw Figure 5A Another implementation method;

[0023] Figure 6 A schematic diagram illustrating a pulse width modulation signal of a light-emitting module according to an embodiment of the present disclosure is shown.

[0024] Figures 7A to 8C A schematic diagram illustrating a pulse width modulation signal of a light-emitting module according to some embodiments of this disclosure is shown.

[0025] Figures 9A to 9C A top view illustrating the operation of the button and knob assembly according to some embodiments of this disclosure.

[0026] [Symbol Explanation]

[0027] 100: Single-button color-tuning LED lighting device

[0028] 110: Control Panel

[0029] 112: Microcontroller Unit Control Circuit

[0030] 114: Microcontroller Unit

[0031] 116: Electromagnetic Interference Protection Circuit

[0032] 117: Rectifier and Filter Circuit

[0033] 118: DC constant voltage power supply circuit

[0034] 120: Button and knob assembly

[0035] 122: Knob

[0036] 124: Shaft

[0037] 130: Light-emitting module

[0038] 132: First pulse width modulation control constant current circuit

[0039] 134: Second pulse width modulation control constant current circuit

[0040] 136: First Light Emitting Diode

[0041] 138: Second LED

[0042] 200: Power Supply

[0043] ADC: Analog-to-Digital Converter

[0044] D1, D2: Direction

[0045] I / O: Input / Output Signals

[0046] L1, L2: Pulse width modulation signals

[0047] P: Period

[0048] PWM1, PWM2: Pulse Width Modulation Signals

[0049] R1, R2: Resistors

[0050] T1: Pulse duration

[0051] T2: Pulse off time

[0052] SW: Switch

[0053] VR: Variable Resistor Detailed Implementation

[0054] The following description of embodiments provides numerous different implementations, or examples, for carrying out various features of the provided object. Specific examples of elements and arrangements are described below to simplify the subject matter. Of course, these examples are merely illustrative and are not intended to be limiting. Furthermore, element symbols and / or letters may be repeated in various examples. This repetition is for simplicity and clarity and does not in itself specify the relationship between the various embodiments and / or configurations discussed.

[0055] Spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for descriptive purposes to describe the relationship between one element or feature and another, as shown in the accompanying drawings. Spatial relative terms are intended to cover different orientations of the apparatus in use or operation other than those shown in the accompanying drawings. The apparatus may be oriented in other ways (rotated 90 degrees or otherwise), and the spatial relative descriptors used herein shall be interpreted accordingly.

[0056] Figure 1 A block diagram of a single-button adjustable LED lighting device 100 according to an embodiment of the present disclosure is shown. The single-button adjustable LED lighting device 100 includes a control board 110, a button / knob assembly 120, and light-emitting modules 130. The control board 110 has a microcontroller unit (MCU) control circuit 112. The button / knob assembly 120 is disposed on the control board 110 and electrically connected to the MCU control circuit 112. The light-emitting modules 130 are located outside the control board 110 and separated from each other, and have a first pulse-width modulation (PWM) control constant current circuit 132, a second pulse-width modulation control constant current circuit 134, a first light-emitting diode 136, and a second light-emitting diode 138. The number of first light-emitting diodes 136 and the number of second light-emitting diodes 138 can be multiple and are not intended to limit the present disclosure. The first pulse-width modulation control constant current circuit 132 is electrically connected to the MCU control circuit 112 and the first light-emitting diode 136. The second pulse width modulation control constant current circuit 134 is electrically connected to the microcontroller unit control circuit 112 and the second light-emitting diode 138.

[0057] The color temperature of the first light-emitting diode 136 is different from that of the second light-emitting diode 138. For example, the first light-emitting diode 136 may be a warm white light-emitting diode, and the second light-emitting diode 138 may be a white (or cool white) light-emitting diode. In some embodiments, the color temperature of the first light-emitting diode 136 may be in the range of 2500K to 3500K, and the color temperature of the second light-emitting diode 138 may be in the range of 5500K to 6500K. The light-emitting module 130 may emit light with a color temperature in the range of 2700K to 6500K.

[0058] The following description will explain the structure and circuit design of the single-key adjustable color LED lighting device 100.

[0059] Figure 2 Draw Figure 1 A perspective view of the control panel 110 and the button and knob assembly 120. Figure 3 Draw Figure 1 The circuit diagram of control board 110. See also... Figure 2 and Figure 3 The button and knob assembly 120 includes a knob 122 and a rotating shaft 124. The microcontroller unit control circuit 112 has a variable resistor VR and a switch SW. The rotating shaft 124 connects the variable resistor VR and the switch SW. The knob 122 is fixed to the rotating shaft 124 and can be rotated by a finger in direction D1 or its opposite direction, and can be pressed in direction D2 or pulled out in the opposite direction of D2 (i.e., upwards). When the knob 122 drives the rotating shaft 124 to rotate (e.g., in direction D1), the rotating shaft 124, through the design of the variable resistor VR, allows the knob 122 to rotate continuously, not in steps; that is, the knob 122 adjusts the resistance value of the variable resistor VR through stepless rotation. The direction in which the knob 122 is pressed (D2) (or pulled out) is the axis of the rotating shaft 124, which is also the normal direction of the control board 110. Pressing (or pulling out) knob 122 changes the state of switch SW (e.g., pressing (or pulling out) knob 122 turns switch SW off). For example, when knob 122 is briefly pressed (or briefly pulled out), the microcontroller unit control circuit 112 can change the light-emitting module 130 from an off state to an on state, or from an on state to an off state. In another embodiment, when knob 122 is continuously pressed or continuously pulled out, the microcontroller unit control circuit 112 can change the light-emitting module 130 from an off state to an on state, or from an on state to an off state. Furthermore, in this embodiment, switch SW has a first state after knob 122 is briefly pressed (or briefly pulled out) or a second state when knob 122 is continuously pressed (or continuously pulled out).

[0060] See also Figure 1 and Figure 3The control board 110 may also include an electromagnetic interference (EMI) protection circuit 116, a rectifier and filter circuit 117, and a DC constant voltage power supply circuit 118. The EMI protection circuit 116 is electrically connected to the power supply 200 (e.g., AC mains power) and has pulse wave protection and lightning protection functions. The rectifier and filter circuit 117 is electrically connected to the EMI protection circuit 116, the first pulse width modulation control constant current circuit 132, and the second pulse width modulation control constant current circuit 134. The DC constant voltage power supply circuit 118 is electrically connected to the rectifier and filter circuit 117 and the microcontroller unit control circuit 112. Furthermore, in some embodiments, the microcontroller unit control circuit 112 can memorize the state of the light-emitting module 130 before power failure. When power is restored next time, the microcontroller unit control circuit 112 can restore the state of the light-emitting module 130 before power failure, thus realizing the power failure memory function.

[0061] Figure 4 Draw Figure 1 The circuit diagram of the light-emitting module 130. Figure 4 Electrical connection of the contacts on the left side of the light-emitting module 130 Figure 3 The contacts on the right side of the control board 110. The first pulse width modulation control constant current circuit 132 and the second pulse width modulation control constant current circuit 134 can be connected in parallel with multiple constant current integrated circuits (ICs) according to power requirements.

[0062] Figure 5A Draw Figure 1 The circuit diagram of the microcontroller unit control circuit 112, the first pulse width modulation control constant current circuit 132, the second pulse width modulation control constant current circuit 134, the first light-emitting diode 136, and the second light-emitting diode 138. Figure 5B Draw Figure 5A Enlarged view of switch SW and variable resistor VR. See also... Figure 5A and Figure 5B The microcontroller unit (MCU) 114 of the microcontroller unit control circuit 112 can receive input / output signals (I / O) and, through analog-to-digital conversion (ADC), read the resistance value of the variable resistor VR based on the ADC signal, and determine whether the switch SW is pressed (i.e., connected to the switch SW). Figure 2 Whether knob 122 is pressed (or pulled out) determines whether the change in resistance adjusts brightness or color temperature, and transmits the corresponding pulse width modulation signals PWM1 and PWM2. The variable resistor VR in the above design only requires two pins of the microcontroller unit 114, while the conventional rotary encoder requires three pins. Furthermore, since the resistance value of the variable resistor VR is directly related to the rotation position of knob 122, the user can clearly know the current status of the lighting device, such as whether the brightness is at its brightest or dimmest position.

[0063] Figure 5C Draw Figure 5A Another implementation method. This implementation method and... Figure 5A The difference in the implementation method is that the positions of resistors R1 and R2 are interchanged with the positions of switch SW and variable resistor VR. In other words, Figure 5A Resistors R1 and R2 are positioned at the top, while... Figure 5C Resistors R1 and R2 are positioned below. Furthermore, Figure 5C The resistors R1 and R2 can also be replaced by the resistors built into the microcontroller unit 114.

[0064] See also Figure 2 and Figure 5A In some embodiments, as shown in Table 1 below, when knob 122 is not pressed (or pulled out), switch SW is not pressed (on). Rotating knob 122 clockwise (D1) increases the resistance of variable resistor VR, thus increasing the brightness of the lighting device. When switch SW is not pressed and knob 122 is rotated counterclockwise (opposite to direction D1), the resistance of variable resistor VR decreases, thus decreasing the brightness of the lighting device. When knob 122 is pressed (or pulled out), switch SW is pressed (off). Simultaneously, rotating knob 122 clockwise (D1) increases the resistance of variable resistor VR, thus increasing the color temperature of the lighting device. Simultaneously, pressing switch SW and rotating knob 122 counterclockwise (opposite to direction D1) decreases the resistance of variable resistor VR, thus decreasing the color temperature of the lighting device. The operational procedures can also be found in [reference needed]. Figure 9B and Figure 9C .

[0065]

[0066] Table 1

[0067] In another embodiment, when knob 122 is not pressed (or pulled out), switch SW is not pressed (on). Rotating knob 122 clockwise (D1) increases the resistance of variable resistor VR, thus increasing the color temperature of the lighting device. When switch SW is not pressed and knob 122 is rotated counterclockwise (opposite to direction D1), the resistance of variable resistor VR decreases, thus decreasing the color temperature of the lighting device. When knob 122 is pressed (or pulled out), switch SW is pressed (off). Simultaneously, rotating knob 122 clockwise (D1) increases the resistance of variable resistor VR, thus increasing the brightness of the lighting device. Simultaneously, pressing switch SW and rotating knob 122 counterclockwise (opposite to direction D1) decreases the resistance of variable resistor VR, thus decreasing the brightness of the lighting device.

[0068] Figure 6 Illustration of a light-emitting module 130 according to an embodiment of this disclosure (see Figure 1A schematic diagram of a pulse width modulation (PWM) signal. See also... Figure 1 and Figure 6 The pulse has a period P, which includes a pulse duration T1 and a pulse off time T2. Pulse width modulation (PWM) can adjust the output current through the first LED 136 and the second LED 138 by adjusting the pulse duration T1. The longer the pulse duration T1, the greater the output current to the first LED 136 and the second LED 138, i.e., the higher the brightness. Conversely, the shorter the pulse duration T1, the smaller the output current to the first LED 136 and the second LED 138, i.e., the lower the brightness.

[0069] Back Figure 1 and Figure 3 The microcontroller unit control circuit 112 can generate corresponding two-pulse width modulation signals based on the resistance value of the variable resistor VR and the state of the switch SW, to control the output current of the first light-emitting diode 136 and the second light-emitting diode 138 respectively, thereby causing the light-emitting module 130 to emit light of different brightness or color temperature. In some embodiments, the resistance value of the variable resistor VR can be adjusted from 0 to half of the input circuit voltage (Vcc / 2), the brightness of the light-emitting module 130 can be adjusted from 0 to 100%, and the color temperature of the light-emitting module 130 can be adjusted from 3000K to 6000K. In the following description, the operating mechanism of adjusting the brightness and color temperature of the light-emitting module 130 by adjusting the pulse duration of the aforementioned single-button knob assembly 120 will be explained.

[0070] Figures 7A to 8C Illustration of a light-emitting module 130 according to some embodiments of this disclosure (see Figure 1 The diagram shows the pulse width modulation signal, where the pulse width modulation signal L1 is the pulse of the first light-emitting diode 136 (e.g., color temperature 3000K), and the pulse width modulation signal L2 is the pulse of the second light-emitting diode 138 (e.g., color temperature 6000K).

[0071] Figures 9A to 9C A top view is shown of the control button and knob assembly 120 according to some embodiments of this disclosure. When the knob 122 actuates the pivot 124 below it (see... Figure 2 When rotating, the shaft 124 passes through a variable resistor VR (see...) Figure 3 This allows knob 122 to be rotated steplessly within an angle range of 0 to 180 degrees to adjust the resistance value of the variable resistor VR. For example, the angle range is from half a turn from the "-" position on the left side of knob 122 to the "+" position on the right side. Refer to [link / reference] when turning the light on or off. Figure 3 and Figure 9AA short press (or short pull) of knob 122 causes the microcontroller unit control circuit 112 to detect a change in the state of switch SW. Based on the current on / off state of the first LED 136 and the second LED 138, the microcontroller unit control circuit 112 changes the state of the LEDs 136 and 138 in the light-emitting module 130 from off to on or from on to off. The on / off state can be, for example... Figures 7A to 8C Either one is provided to the pulse width modulation signal L1 of the first light-emitting diode 136 and the pulse width modulation signal L2 of the second light-emitting diode 138.

[0072] When the first LED 136 and the second LED 138 are in the "on" state and brightness adjustment (dimming) is required, refer to... Figure 9B You can simply rotate knob 122 without pressing (or pulling out) it; at this time, switch SW (see...) Figure 3 In the first state (e.g., switch SW is on). When knob 122 is turned, the variable resistor VR (see...) Figure 3 By changing the resistance value of the first LED 136 (see [link]), the two pulse width modulation signals can adjust the resistance of the first LED 136. Figure 1 ) and the second light-emitting diode 138 (see Figure 1 Overall brightness. For example, when knob 122 is turned in direction D1, Figure 8B The two pulse width modulation signals L1 and L2 respectively adjust the pulse duration to Figure 7B Two pulse width modulation signals L1 and L2 are used to increase the output current of the first light-emitting diode 136 and the second light-emitting diode 138 (e.g., from 50% to 100%), while keeping the color temperature unchanged (e.g., 4500K). Conversely, when the knob 122 is rotated in the opposite direction to direction D1, Figure 7B The two pulse width modulation signals L1 and L2 respectively adjust the pulse duration to Figure 8B Two pulse width modulation signals L1 and L2 are used to reduce the output current of the first light-emitting diode 136 and the second light-emitting diode 138. In this way, the light-emitting module 130 (see...) Figure 1 The brightness of the emitted light is altered.

[0073] In another embodiment, when the first LED 136 and the second LED 138 are in the on state and brightness adjustment (dimming) is required, refer to... Figure 9C You can simultaneously press and hold (or pull out) the knob 122 while rotating it. At this time, the switch SW (see...) Figure 3 In the second state (e.g., switch SW closed). When knob 122 is pressed and rotated, the variable resistor VR (see...) Figure 3 By changing the resistance value of the first LED 136 (see [link]), the two pulse width modulation signals can adjust the resistance of the first LED 136. Figure 1 ) and the second light-emitting diode 138 (see Figure 1 Overall brightness.

[0074] It should be understood that Figure 8A and Figure 7A The pulse width modulation signals L1 and L2 are adjusted between and Figure 8C and Figure 7C The adjustment of the pulse width modulation signals L1 and L2 between them operates in the same way as described above, and will not be repeated here.

[0075] When the first LED 136 and the second LED 138 are in the "on" state and color temperature adjustment is required, refer to... Figure 9C You can simultaneously press and hold (or pull out) the knob 122 while rotating it. At this time, the switch SW (see...) Figure 3 In the second state (e.g., switch SW closed). When knob 122 is pressed and rotated, the variable resistor VR (see...) Figure 3 The resistance value of the first LED 136 can be adjusted by changing the two pulse width modulation signals. Figure 1 ) and the second light-emitting diode 138 (see Figure 1 Overall color temperature. For example, when knob 122 is pressed down (or pulled out) and rotated in direction D1, Figure 7A The two pulse width modulation signals L1 and L2 respectively adjust the pulse duration to Figure 7B The two pulse width modulation signals L1 and L2 are used to change the output current of the first LED 136 and the second LED 138. For example, the output current of the first LED 136 is decreased while the output current of the second LED 138 is increased, thereby increasing the color temperature from 3000K to 4000K. Conversely, when the knob 122 is pressed down (or pulled out) and rotated in the opposite direction to direction D1, Figure 7B The two pulse width modulation signals L1 and L2 respectively adjust the pulse duration to Figure 8A Two pulse width modulation signals L1 and L2 are used to increase the output current of the first light-emitting diode 136 but decrease the output current of the second light-emitting diode 138. In this way, the light-emitting module 130 (see...) Figure 1 The color temperature of the emitted light can be changed.

[0076] In another embodiment, when the first LED 136 and the second LED 138 are in the "on" state and color temperature adjustment is required, refer to... Figure 9B You can simply rotate knob 122 without pressing (or pulling out) it; at this time, switch SW (see...) Figure 3 In the first state (e.g., switch SW is on). When knob 122 is turned, the variable resistor VR (see...) Figure 3By changing the resistance value of the first LED 136 (see [link]), the two pulse width modulation signals can adjust the resistance of the first LED 136. Figure 1 ) and the second light-emitting diode 138 (see Figure 1 Overall color temperature.

[0077] It should be understood that Figure 7B and Figure 7C The pulse width modulation signals L1 and L2 are adjusted between them. Figure 8A and Figure 8B The pulse width modulation signals L1 and L2 are adjusted between and Figure 8B and Figure 8C The adjustment of the pulse width modulation signals L1 and L2 between them operates in the same way as described above, and will not be repeated here.

[0078] The aforementioned method of adjusting color temperature (or brightness) is performed by pressing and simultaneously rotating knob 122, while a short press of knob 122 is used to turn the light on or off. In another embodiment, the light can be turned on or off by pressing and simultaneously rotating knob 122, while the color temperature or brightness can be adjusted by pressing and simultaneously rotating knob 122.

[0079] In summary, because the single-button adjustable LED lighting device features a button and knob assembly on the control panel, a microcontroller unit control circuit with a variable resistor and a switch, and a light-emitting module with a first pulse width modulation (PWM) control constant current circuit electrically connecting the microcontroller unit control circuit to the first LED and a second PWM control constant current circuit electrically connecting the microcontroller unit control circuit to the second LED, the user can operate the button and knob assembly to cause the microcontroller unit control circuit to generate corresponding two-pulse width modulation signals based on the resistance value of the variable resistor and the state of the switch. This allows control over the output current of the first and second LEDs, thereby adjusting the brightness and color temperature of the light-emitting module.

[0080] The foregoing outlines the features of several embodiments to enable those skilled in the art to better understand the nature of this disclosure. Those skilled in the art should understand that they can readily use this disclosure as the basis for designing or modifying other processes and structures to achieve the same purposes and / or advantages as the embodiments described herein. Those skilled in the art should also recognize that such equivalent constructions do not depart from the spirit and scope of this disclosure, and that various changes, substitutions, and alterations can be made to them without departing from the spirit and scope of this disclosure.

Claims

1. A single-key adjustable LED lighting device, characterized in that, include: A control board having a microcontroller unit control circuit, wherein the microcontroller unit control circuit has a variable resistor and a switch; A button-and-knob assembly, mounted on the control board and electrically connected to the microcontroller unit control circuit, includes: A rotating shaft connects the variable resistor to the switch; as well as A knob, fixed to the pivot, is configured for pressing or pulling out, and for rotation, wherein when the knob drives the pivot to rotate, the pivot is configured to adjust the resistance value of the variable resistor by allowing the knob to rotate steplessly within an angular range; and A light-emitting module includes a first pulse width modulation control constant current circuit, a second pulse width modulation control constant current circuit, a first light-emitting diode, and a second light-emitting diode. The first pulse width modulation control constant current circuit is electrically connected to the microcontroller unit control circuit and the first light-emitting diode, and the second pulse width modulation control constant current circuit is electrically connected to the microcontroller unit control circuit and the second light-emitting diode.

2. The single-key color-tuning LED lighting device as described in claim 1, characterized in that, The light-emitting modules are located outside the control panel and are separate from each other.

3. The single-key color-tuning LED lighting device as described in claim 1, characterized in that, The control panel also includes: An electromagnetic interference protection circuit is electrically connected to a power source.

4. The single-key color-tuning LED lighting device as described in claim 3, characterized in that, The control panel also includes: A rectifier filter circuit is electrically connected to the electromagnetic interference protection circuit, the first pulse width modulation control constant current circuit, and the second pulse width modulation control constant current circuit.

5. The single-key color-tuning LED lighting device as described in claim 4, characterized in that, The control panel also includes: A DC constant voltage power supply circuit is electrically connected to the rectifier and filter circuit and the microcontroller unit control circuit.

6. The single-key color-tuning LED lighting device as described in claim 1, characterized in that, The knob is configured to be pressed or pulled out in one direction, which is the axial direction of the shaft.

7. The single-key color-tuning LED lighting device as described in claim 6, characterized in that, The direction in which the knob is pressed or pulled is the normal direction of the control panel.

8. The single-key color-tuning LED lighting device as described in claim 1, characterized in that, The color temperature of the first light-emitting diode is different from that of the second light-emitting diode. The color temperature of the first light-emitting diode is in the range of 2500K to 3500K, while the color temperature of the second light-emitting diode is in the range of 5500K to 6500K.

9. The single-key color-tuning LED lighting device as described in claim 1, characterized in that, The light-emitting module is configured to emit light with a color temperature ranging from 2700K to 6500K.

10. The single-key color-tuning LED lighting device as described in claim 1, characterized in that, The angle range is from 0 degrees to 180 degrees.

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