Lighting fixtures that allow color temperature adjustment via a switch.
The LED lighting appliance with a switch-based color temperature adjustment circuit addresses the need for multiple fixtures by enabling five adjustable color temperatures, reducing costs and simplifying inventory management.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-02-12
- Publication Date
- 2026-04-09
AI Technical Summary
Current LED lighting appliances have a single color temperature, requiring consumers to purchase multiple fixtures for different atmospheres, increasing costs and inventory management burdens for sellers.
A lighting appliance with a switch that allows adjustment of color temperature to five different settings, utilizing a circuit with parallel-connected LED groups and a switch control module to achieve multiple color temperatures in a single fixture.
Enables cost-effective mass production and reduces inventory burdens by allowing a single fixture to support multiple color temperatures, facilitating easy color adjustments.
Smart Images
Figure 0003255464000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of LED lighting appliance circuits, and particularly to a lighting appliance that realizes color temperature adjustment by a switch.
Background Art
[0002] Currently, with the popularization of LED chip technology, its cost has become increasingly lower, and lighting devices composed of LED strings are increasing. However, as LED household lighting appliances, there are still many problems. Currently, most LED lighting appliances in the market have a single color temperature. When consumers want to realize different color temperatures according to different atmospheres, they need to purchase two types of lighting appliances with different color temperatures, which is relatively costly and also has a certain impact on the installation environment. At the same time, sellers need to stock two types of lighting appliances with different color temperatures simultaneously, which is a heavy cost burden and difficult to manage inventory. When using the lighting appliance of the present technology, the seller only needs to have one finished product, which can support multiple color temperatures such as high color temperature and low color temperature, thus reducing the inventory burden and procurement cost.
Summary of the Invention
Problems to be Solved by the Invention
[0003] Based on the above problems in the current circuit technology field of LED lighting appliances, the present invention provides a lighting appliance that realizes color temperature adjustment by a switch, can realize five different color temperatures with one lighting appliance, and at the same time enables mass production of LED lighting appliances and realizes cost reduction.
Means for Solving the Problems
[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions.
[0005] A lighting fixture that enables color temperature adjustment by a switch, comprising a lamp housing, a hook assembly, and a circuit board, wherein the lamp housing includes a mounting case, an anti-glare cover, and a mounting base, the circuit board is installed inside the mounting case, the hook assembly is connected to the mounting case, a switching power supply circuit is provided on the circuit board, the switching power supply circuit includes a first group of light-emitting diodes, a second group of light-emitting diodes, a switch control module, and a rectifier filter circuit, the rectifier filter circuit is connected to the first group of light-emitting diodes, the second group of light-emitting diodes, and the switch control module, respectively, and its features are as follows: the color temperature of the first group of light-emitting diodes is lower than the color temperature of the second group of light-emitting diodes. The first group of light-emitting diodes is connected in parallel to the second group of light-emitting diodes, the anti-glare cover is installed between the mounting case and the mounting base, a rear case is installed on the rear side of the mounting case, a support structure is provided at the bottom end of the rear case, the lighting fixture further includes a DIP switch, the DIP switch includes an operating mechanism and a contact assembly connected thereto, a square groove is provided on the outer surface of the rear case, the operating mechanism is installed in the square groove and penetrates the rear case, the contact assembly is connected to a switching power supply circuit on a circuit board, a plurality of anti-slip strips are provided on the surface of the operating mechanism, the DIP switch includes five stages, and the switching power supply circuit further includes a color temperature adjustment circuit. The aforementioned color temperature control circuit is A group of diodes, wherein the group of diodes includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode, A group of resistors, wherein the group of resistors includes a first resistor, a second resistor, a third resistor, and a fourth resistor, A first stage circuit, which is connected to the first stage of the DIP switch and is configured such that the first group of light-emitting diodes and the switch control module are directly connected, A second stage circuit, which is connected to the second stage of the DIP switch, and is configured such that the first group of light-emitting diodes and the second group of light-emitting diodes are each connected to a diode group, a resistor group, and a switch control module, A third stage circuit, which is connected to the third stage of the DIP switch, and is configured such that the first group of light-emitting diodes and the second group of light-emitting diodes are each connected to a diode group, a resistor group, and a switch control module, A fourth-stage circuit, which is connected to the fourth stage of the DIP switch, and is configured such that the first group of light-emitting diodes and the second group of light-emitting diodes are each connected to a diode group, a resistor group, and a switch control module, The fifth stage circuit includes a fifth stage circuit connected to the fifth stage of the DIP switch, and configured such that the second group of light-emitting diodes and the switch control module are directly connected.
[0006] According to one aspect of the present invention, the second stage circuit includes: a first group of light-emitting diodes connected to the positive terminal of the first diode, the negative terminal of the first diode connected to a switch control module, a second group of light-emitting diodes connected to the positive terminal of the sixth diode, the negative terminal of the sixth diode connected to the positive terminal of the fifth diode, the negative terminal of the fifth diode connected to a third resistor, the other end of the third resistor connected to the positive terminal of the third diode, the negative terminal of the third diode connected to a second resistor, and the other end of the second resistor connected to a switch control module. The third stage circuit includes: a first group of light-emitting diodes connected to the positive terminal of the first diode, the negative terminal of the first diode connected to the positive terminal of the second diode, the negative terminal of the second diode connected to the first resistor, the other end of the first resistor connected to a switch control module, a second group of light-emitting diodes connected to the positive terminal of the sixth diode, the negative terminal of the sixth diode connected to the positive terminal of the fifth diode, the negative terminal of the fifth diode connected to the third resistor, the other end of the third resistor connected to a switch control module. The fourth stage circuit includes the following: a first group of light-emitting diodes is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the positive terminal of the second diode, the negative terminal of the second diode is connected to the first resistor, the other end of the first resistor is connected to the positive terminal of the fourth diode, the negative terminal of the fourth diode is connected to the fourth resistor, the other end of the fourth resistor is connected to a switch control module, a second group of light-emitting diodes is connected to the positive terminal of the sixth diode, and the negative terminal of the sixth diode is connected to a switch control module.
[0007] According to one aspect of the present invention, the switch control module includes a first pin, a second pin, a third pin, a fourth pin, and a fifth pin, where the first pin controls the first stage circuit, the second pin controls the second stage circuit, the third pin controls the third stage circuit, the fourth pin controls the fourth stage circuit, and the fifth pin controls the fifth stage circuit.
[0008] According to one aspect of the present invention, the first pin is connected to the positive terminal of the first group of light-emitting diodes and the first diode, respectively; the second pin is connected to the negative terminal of the first diode, the positive terminal of the second diode, and the second resistor, respectively; the third pin is connected to one end of the first resistor, the positive terminal of the third diode, the positive terminal of the fourth diode, and the third resistor, respectively; the fourth pin is connected to the fourth resistor, the positive terminal of the fifth diode, and the negative terminal of the sixth diode, respectively; and the fifth pin is connected to the positive terminal of the second group of light-emitting diodes and the sixth diode, respectively.
[0009] According to one aspect of the present invention, a plurality of anti-glare steps are installed inside the anti-glare cover, and the plurality of anti-glare steps are connected in sequence.
[0010] According to one aspect of the present invention, the anti-glare step includes a connecting edge, a fillet transition section, and a diffusion edge, and the connecting edge, fillet transition section, and diffusion edge are connected in order.
[0011] According to one aspect of the present invention, the connecting edge is perpendicular to the central axis of the lamp housing.
[0012] According to one aspect of the present invention, the angle between the diffusion edge and the central axis of the lamp housing is between 9° and 11°.
[0013] According to one aspect of the present invention, the total color temperature of the first stage circuit is 5000K, the total color temperature of the second stage circuit is 4000K, the total color temperature of the third stage circuit is 3500K, the total color temperature of the fourth stage circuit is 3000K, and the total color temperature of the fifth stage circuit is 2700K.
[0014] According to one aspect of the present invention, the rectifier filter circuit includes at least a seventh diode, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, and a first filter capacitor, wherein the positive terminal of the seventh diode is connected to the first capacitor, and its negative terminal is connected to the first resistor and the positive terminal of the power supply output terminal, and the other end of the positive terminal of the power supply output terminal is connected to the first group of light-emitting diodes and the second group of light-emitting diodes, and the other end of the first capacitor is connected to the first resistor, and the positive terminal of the first filter capacitor is connected to the negative terminal of the seventh diode, and the negative terminal of the first filter capacitor is connected to one end of the second capacitor and the negative terminal of the power supply output terminal, and the other end of the second capacitor is grounded, and one end of the fifth resistor is connected to the negative terminal of the seventh diode, and the other end is connected to the negative terminal of the power supply output terminal and is grounded. [Effects of the Invention]
[0015] The advantages of carrying out the present invention are as follows: The color temperature adjustment circuit comprises a first stage circuit in which a first group of light-emitting diodes and a switch control module are directly connected; a second stage circuit in which a first group of light-emitting diodes is connected to a first diode and a switch control module, and a second group of light-emitting diodes is connected to a sixth diode, a fifth diode, a third resistor, a third diode, a second resistor, and a switch control module; and a third stage circuit in which a first group of light-emitting diodes is connected to a first diode, a second diode, a first resistor, and a switch control module, and a second group of light-emitting diodes is connected to a sixth diode The third stage circuit is connected to a switch control module and consists of a fifth diode, a third resistor, and a fifth diode. The fourth stage circuit consists of a first group of light-emitting diodes connected to a first diode, a second diode, a first resistor, a fourth diode, a fourth resistor, and a switch control module, and a second group of light-emitting diodes connected to a sixth diode and a switch control module. The fifth stage circuit consists of a second group of light-emitting diodes and a switch control module that are directly connected. This configuration enables multiple different color temperature adjustments on a single lighting fixture, simultaneously facilitating mass production of LED lighting fixtures and reducing costs. [Brief explanation of the drawing]
[0016] To more clearly explain the technical concepts in the embodiments of the present invention, the following briefly describes the drawings that need to be used in the embodiments. It is obvious that the drawings in the following description are only a few embodiments of the present invention, and those skilled in the art can obtain other drawings based on the structures shown in these drawings without expending any creative effort.
[0017] [Figure 1] This is a schematic diagram of the structure of a switching power supply circuit for a lighting fixture that achieves color temperature adjustment using the switch described in the present invention. [Figure 2] This is a schematic diagram of the external appearance of a lighting fixture that achieves color temperature adjustment using the switch described in the present invention. [Figure 3]It is a schematic cross-sectional view of a lighting fixture that realizes color temperature adjustment by the switch described in the present invention. [Figure 4] It is a schematic view of an anti-glare step structure of a lighting fixture that realizes color temperature adjustment by the switch described in the present invention.
Embodiments for Carrying Out the Invention
[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present utility model in connection with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments in the present invention, all other embodiments that can be conceived by those skilled in the art without creative efforts all belong to the technical scope of the present invention.
Embodiment
[0019] As shown in FIG. 1, a lighting fixture that realizes color temperature adjustment by a switch, including a lamp housing 1, a hook assembly 2, a circuit board 3, and a rear case 11. The lamp housing 1 includes a mounting case 4, an anti-glare cover 5, and a mounting base 6. The circuit board 3 is installed inside the mounting case 4, and the rear case 11 is installed on the rear side of the mounting case 4. The hook assembly 2 is connected to the mounting case 4, and the mounting case 4 is provided with hook fixing screw holes. The hook assembly 2 is fixedly connected to the mounting case 4 through the hook fixing screw holes.
[0020] The anti-glare cover 5 is installed between the mounting case 4 and the mounting base 6, and a plurality of anti-glare steps 7 are installed inside it. The plurality of anti-glare steps 7 are connected in sequence and include a connecting side 8, a fillet transition part 9, and a diffusion side 10. The connecting side 8, the fillet transition part 9, and the diffusion side 10 are connected in sequence. In this embodiment, the number of anti-glare steps 7 is set to 17. The connecting side 8 is perpendicular to the central axis of the lamp housing 1, and the angle formed by the diffusion side 10 and the central axis of the lamp housing 1 is between 9° and 11°. In this embodiment, the angle formed by the diffusion side 10 and the central axis of the lamp housing 1 is set to 10°.
[0021] A support structure 12 is provided at the bottom end of the rear case 11. In this embodiment, the support structure 12 is installed as a screw rod, and a fixing member is provided on the screw rod to control the height of the lighting fixture that realizes color temperature adjustment by a switch. The lighting fixture further includes a dip switch 13. The dip switch 13 includes an operating mechanism and a contact assembly connected thereto. A corner groove is provided on the outer surface of the rear case 11. The operating mechanism is installed in the corner groove and penetrates the rear case 11. The contact assembly is connected to a switching power supply circuit on a circuit board. A plurality of anti-slip strips are provided on the surface of the operating mechanism. The dip switch 13 includes five steps.
[0022] A switching power supply circuit is provided on the circuit board 3. The switching power supply circuit includes a first light-emitting diode group, a second light-emitting diode group, a switch control module, a rectifying and filtering circuit, and a color temperature adjustment circuit. The rectifying and filtering circuit is connected to the first light-emitting diode group, the second light-emitting diode group, and the switch control module respectively. The switch control module is connected to the color temperature adjustment circuit and controls its conduction mode. The switch control module is connected to the dip switch 13.
[0023] The first light-emitting diode group is connected in parallel with the second light-emitting diode group and each includes seven series-connected light-emitting diodes. The color temperature of the first light-emitting diode group is higher than that of the second light-emitting diode group. The color temperature of the first light-emitting diode group is 5000K, and the color temperature of the second light-emitting diode group is 2700K. The combined color temperature of the first light-emitting diode group and the second light-emitting diode group controlled by the color temperature adjustment circuit is between the color temperature of the first light-emitting diode group and the color temperature of the second light-emitting diode group. The highest color temperature is the color temperature of the first light-emitting diode group, and the lowest color temperature is the color temperature of the second light-emitting diode group. The color temperature adjustment circuit adjusts the magnitude of the current flowing through the first light-emitting diode group and the second light-emitting diode group to realize control for different color temperatures.
[0024] The color temperature control circuit includes diodes D3, D3, D5, D6, D7, D9, resistors R22, R20, R24, R27, and a first, second, third, fourth, and fifth stage circuit composed of the above elements. The switch control module includes two rows of five-position slide switches, which are connected in correspondence with DIP switches and have pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12. Pins 3, 7, 8, 9, 10, 11, and 12 are connected to the rectifier filter circuit, respectively. The positive terminal of diode D3 is connected to the first group of light-emitting diodes and pin 1, respectively, and the negative terminal of diode D3 is connected to pin 2, the positive terminal of diode D4, and one end of resistor R20, respectively. The negative terminal of diode D4 is connected to one end of resistor R22, and the other end of resistor R22 is connected to pin 4, the positive terminal of diode D5, one end of resistor R24, and the positive terminal of diode D6. The other end of resistor R20 is connected to the negative terminal of diode D5, and the positive terminal of diode D5 is connected to pin 4, resistor R22, one end of resistor R24, and the positive terminal of diode D6, respectively. The negative terminal of diode D6 is connected to resistor R27, and the other end of resistor R27 is connected to pin 5, the positive terminal of diode D7, and the negative terminal of diode D9, respectively. The positive terminal of diode D7 is connected to the negative terminal of diode D9, and the negative terminal of diode D7 is connected to the other end of resistor R24. The positive terminal of diode D9 is connected to the second group of light-emitting diodes and pin 6, respectively, and the negative terminal of diode D9 is connected to the positive terminal of diode D7, resistor R27, and pin 5, respectively. The first stage circuit is constructed by directly connecting the first group of light-emitting diodes and pin 1. The second stage circuit is divided into two branches. The first branch is constructed by sequentially connecting the first group of light-emitting diodes, diode D3, and pin 2. The second branch is constructed by sequentially connecting the second group of light-emitting diodes, diode D9, diode D7, resistor R24, diode D5, resistor R20, and pin 2.The third stage circuit is divided into two branches. The first branch is configured by connecting the first group of light-emitting diodes, diode D3, diode D4, resistor R22, and pin 4 in that order. The second branch is configured by connecting the second group of light-emitting diodes, diode D9, diode D7, resistor R24, and pin 4 in that order. The fourth stage circuit is divided into two branches. The first branch is configured by connecting the first group of light-emitting diodes, diode D3, diode D4, resistor R22, diode D6, resistor R27, and pin 5 in that order. The second branch is configured by connecting the second group of light-emitting diodes, diode D9, and pin 5 in that order. The fifth stage circuit is configured by directly connecting the second group of light-emitting diodes and pin 6. The overall color temperature of the first stage circuit is 5000K, the overall color temperature of the second stage circuit is 4000K, the overall color temperature of the third stage circuit is 3500K, the overall color temperature of the fourth stage circuit is 3000K, and the overall color temperature of the fifth stage circuit is 2700K.
[0025] The color temperature adjustment circuit adjusts the current flowing through the first and second groups of light-emitting diodes (LEDs) by using diodes and resistors, and sets the resistance value of the resistors to determine the final overall color temperature of the first and second groups of LEDs. Because the distribution of diodes and resistors in the color temperature adjustment circuit that communicates with different pins is different, the overall color temperature corresponding to each stage of the two rows of five-stage slide switches connected to the DIP switch is different.
[0026] The input N terminal and input L terminal of the rectifier filter circuit are connected to a voltage of 120V to 347V. A varistor RV1 is connected between the input N terminal and the input L terminal, and a fuse F1 is provided between the varistor RV1 and the L terminal. The input N terminal is connected to port 2 of inductor coil LF1, and the input L terminal is connected to port 3 of inductor coil LF1. Ports 1 and 4 of inductor coil LF1 are connected to both sides of safety standard capacitor CX1, CX1 is connected in parallel with resistors R1 and R2, and R1 is connected in series with R2. The outside of R1 is connected to port 1 of inductor coil LF2, and the outside of R2 is connected to port 2 of inductor coil LF2. Port 4 of inductor coil LF2 is connected to port 4 of resistor bridge BD1, port 3 of inductor coil LF2 is connected to port 2 of resistor bridge BD1, and port 3 of resistor bridge BD1 is grounded. Each port of resistor bridge BD1 is connected to one end of inductor L1, resistor R3, and capacitor C1, respectively. The other end of capacitor C1 is grounded, and the other ends of inductor L1 and resistor R3 are connected to one end of resistor R11, resistor R9, and inductor coil L2A. Resistor R11 is connected to resistors R12 and R13 in order, and the other end of resistor R13 is connected to the VDD pin of chip U1. The other end of resistor R9 is connected to resistor R10 and the HV pin of U1 in order. The COMP pin of U1 is connected to capacitor C9 and resistor R17 in order and is also grounded, and capacitor C8 is connected in parallel with capacitor C9 and resistor R17. The GND pin of U2 is grounded. The VDD pin of U2 is connected to the negative terminal of diode D14, and one end of capacitors C6 and C7, and the other ends of capacitors C6 and C7 are grounded. The FB pin of U1 is connected to one end of capacitor C5, resistor R14, and resistor R16, respectively, while the other ends of resistors R14 and R16 are grounded. The CS pin of U1 is connected to one end of capacitor C8 and resistor R8, while the other end of capacitor C8 is grounded. The other end of resistor R8 is connected to one end of resistors R17, R18, and R19, while the other ends of resistors R17, R18, and R19 are grounded.The GATE pin of U1 is connected to one end of resistors R6 and R7. The other end of resistor R7 is connected to the negative terminal of diode D2. The positive terminal of diode D2 and the other end of R6 are connected to resistor R5 and the gate of field-effect transistor Q1. The other end of resistor R5 and the source of field-effect transistor Q1 are connected to resistor R18. The other end of coil inductance L2A is connected to the drain of Q1, the positive terminal of diode D3A, the positive terminal of diode D3, resistor R4, and one end of resistor R4A, respectively. The other ends of resistors R4 and R4A are connected to capacitor C4. The other end of capacitor C4 is connected to the negative terminal of diode D3A, the negative terminal of diode D3, resistor R14, and the negative terminal of diode D1. The other end of resistor R14 is connected to resistors R15 and R16 in that order. The positive terminal of diode D1 is connected to capacitor C2, the other end of capacitor C2 is grounded, and capacitor C3 is connected in parallel with diode D1. The negative terminal of diode D1 is connected in order to capacitors CE2 and CE3 and is also grounded, resistor R18 is connected in parallel with capacitor CE2, and resistor R19 is connected in parallel with capacitor CE3. The negative terminal of diode D1 is connected in order to resistor R30, one end of capacitors C10, R20, R21, and R22, and to the six ports of inductor coil T3B. Resistor R30 is connected in order to R31 and the HV pin of chip IC2. The VDD pin of IC2 is connected to the positive terminals of capacitors C17, C18, and diode D14, respectively, and the other ends of capacitors C17 and C18 are grounded. The FB pin of IC2 is connected to one end of resistors R35, R34, and capacitor C13, respectively. The other ends of resistor R34 and capacitor C13 are grounded. The other end of resistor R35 is connected to resistor R36 and inductor coil T1A. Resistor R36 is connected to the positive terminal of diode D6 and capacitor C26 in that order, and is also grounded. The other end of inductor coil T1A is grounded. The negative terminal of diode D6 is connected to resistor R37 and the collector of transistor Q5, respectively. The other end of resistor R37 is connected to the base of Q5 and the negative terminal of diode ZE1. The positive terminal of ZD1 is grounded. The emitter of transistor Q5 is connected to the positive terminal of diode D14.The DIM pin of IC2 is connected to the negative terminals of capacitor C12 and diode D8, the other end of capacitor C12 is grounded, and the positive terminal of diode D8 is grounded. The input terminals DIM+ and DIM- are connected to a voltage of 0-10V via an external dimmer to power the color temperature control circuit. DIM+ is connected to one end of resistor R39, the other end of resistor R39 is connected to the negative terminal of diode D9 and one end of capacitor C17, the other end of capacitor C17 is connected to the DIM- terminal and port 2 of inductor coil LF3, the positive terminal of diode D9 is connected to port 3 of inductor coil LF3, and ports 4 and 1 of inductor coil LF3 are connected to the negative and positive terminals of diode D8, respectively. The GND pin of IC2 is grounded. The GATE pin of IC2 is connected to one end of resistor R29, the other end of resistor R29 is connected to the positive terminal of diode D5 and the base of transistor Q3, respectively, the negative terminal of diode D5 is connected to the gate of field-effect transistor Q2 and resistor R32, respectively, and the other end of resistor R32 is connected to the emitter of transistor Q3. The CS pin of IC2 is connected to resistor R33 and capacitor C11, the other end of capacitor C11 is grounded, the other end of resistor R33 and the collector of transistor Q3 and the source of field-effect transistor Q2 are connected to one end of resistors R28, R27, R26, and R25, the other ends of resistors R26 and R25 are grounded, the other ends of resistors R28 and R27 are connected to switches J3 and J2, respectively, and the other ends of switches J3 and J2 are grounded. The other ends of capacitor C10, resistors R20, R21, and R22 are connected to resistor R23, the other end of resistor R23 is connected to the negative terminal of diode D4, resistors R24 and R23 are connected in parallel, and the positive terminal of diode D4 is connected to the drain of field-effect transistor Q2.The other end of inductor coil T3B is connected to the drain of field-effect transistor Q2. Inductor coil T3B is connected to inductor coil T3D. One end of inductor coil T3D is connected to the positive terminals of capacitor C15 and diode D12, respectively. Capacitor C15 is connected in series with resistor R49. The other end of resistor R49 is connected to the negative terminal of diode D12, capacitor CE5, resistor R48, and LED+ port, respectively. The other end of LED+ port is connected to the first group of light-emitting diodes and the second group of light-emitting diodes. The other end of inductor coil T3D, the other end of capacitor CE5, and the other end of resistor R48 are connected to capacitor CY4 and LED- port, respectively. The other end of capacitor CY4 is grounded, and the other end of LED- port is connected to pins 3, 7, 8, 9, 10, 11, and 12 of the switch control module.
[0027] When the DIP switch 13 is adjusted to the first stage, the two-row five-stage slide switch slides to the high color temperature stage, and when the first stage circuit is turned on via pin 1, only the first group of light-emitting diodes lights up, the second group of light-emitting diodes does not light up, and the overall color temperature is 5000K.
[0028] When the DIP switch 13 is adjusted to the second stage, the two-row five-position slide switch slides to the semi-high color temperature stage, and when the second stage circuit is turned on via pin 2, both the first and second groups of light-emitting diodes are lit. At this time, the total voltage of the first stage circuit is equal to the voltage of the first group of light-emitting diodes plus the voltage of diode D3, and equal to the voltage of the second group of light-emitting diodes plus the voltage of diode D9, the voltage of diode D7, the voltage of resistor R24, the voltage of diode D5, and the voltage of resistor R20. The circuit current where the first group of light-emitting diodes is located is greater than the circuit current where the second group of light-emitting diodes is located. By adjusting the resistance values, the second stage circuit current required for actual testing is obtained, achieving an overall color temperature of 4000K.
[0029] When the DIP switch 13 is adjusted to the third stage, the two-row five-position slide switch slides to the medium color temperature stage, and when the third stage circuit is turned on via pin 4, both the first and second groups of light-emitting diodes are lit. At this time, the total voltage of the first stage circuit is equal to the voltage of the first group of light-emitting diodes plus the voltage of diode D3, plus the voltage of diode D4, plus the voltage of resistor R22, and equal to the voltage of the second group of light-emitting diodes plus the voltage of diode D9, plus the voltage of diode D7, plus the voltage of resistor R24. The circuit current where the first group of light-emitting diodes is located is equal to the circuit current where the second group of light-emitting diodes is located. By adjusting the resistance values, the third stage circuit current required for actual testing is obtained, and a total color temperature of 3500K is achieved.
[0030] When the DIP switch 13 is adjusted to the fourth stage, the two-row five-position slide switch slides to the semi-low color temperature stage, and when the fourth stage circuit is turned on via pin 5, both the first and second groups of light-emitting diodes are lit. At this time, the total voltage of the first stage circuit is equal to the voltage of the first group of light-emitting diodes plus the voltage of diode D3, the voltage of diode D4, the voltage of resistor R22, the voltage of diode D6, and the voltage of resistor R27, plus the voltage of the second group of light-emitting diodes plus the voltage of diode D9. The circuit current where the first group of light-emitting diodes is located is smaller than the circuit current where the second group of light-emitting diodes is located. By adjusting the resistance values, the fourth stage circuit current required for actual testing is obtained, and an overall color temperature of 3000K is achieved.
[0031] When the DIP switch 13 is adjusted to the fifth stage, the two-row five-stage slide switch slides to the low color temperature stage, and when the fifth stage circuit is turned on via pin 6, only the second group of light-emitting diodes lights up, the first group of light-emitting diodes does not light up, and the overall color temperature is 2700K.
[0032] The advantages of carrying out the present invention are as follows: The color temperature adjustment circuit comprises a first stage circuit in which a first group of light-emitting diodes and a switch control module are directly connected; a second stage circuit in which a first group of light-emitting diodes is connected to a first diode and a switch control module, and a second group of light-emitting diodes is connected to a sixth diode, a fifth diode, a third resistor, a third diode, a second resistor, and a switch control module; and a third stage circuit in which a first group of light-emitting diodes is connected to a first diode, a second diode, a first resistor, and a switch control module, and a second group of light-emitting diodes is connected to a sixth diode The third stage circuit is connected to a switch control module and consists of a fifth diode, a third resistor, and a fifth diode. The fourth stage circuit consists of a first group of light-emitting diodes connected to a first diode, a second diode, a first resistor, a fourth diode, a fourth resistor, and a switch control module, and a second group of light-emitting diodes connected to a sixth diode and a switch control module. The fifth stage circuit consists of a second group of light-emitting diodes and a switch control module that are directly connected. This configuration enables multiple different color temperature adjustments on a single lighting fixture, simultaneously facilitating mass production of LED lighting fixtures and reducing costs.
[0033] The above description is merely a specific embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any changes or substitutions that a person skilled in the art could easily conceive within the scope of the art disclosed by the present invention should be included within the scope of protection of the present invention. Accordingly, the scope of protection of the present invention shall be in accordance with the scope of protection of the claims for utility model registration. [Explanation of Symbols]
[0034] 1: Lamp housing 2: Hook Assembly 3: Circuit board 4: Mounting case 5: Anti-glare cover 6: Mounting base 7: Anti-glare step 8: Connecting edge 9: Fillet transition section 10: Diffuse edge 11: Rear case 12:Support structure 13: DIP switch
Claims
1. A lighting fixture that enables color temperature adjustment by a switch, comprising a lamp housing (1), a hook assembly (2), and a circuit board (3), wherein the lamp housing (1) comprises a mounting case (4), an anti-glare cover (5), and a mounting base (6), the circuit board (3) is installed inside the mounting case (4), the hook assembly (2) is connected to the mounting case (4), a switching power supply circuit is provided on the circuit board (3), the switching power supply circuit comprises a first group of light-emitting diodes, a second group of light-emitting diodes, a switch control module, and a rectifier filter circuit, the rectifier filter circuit is connected to the first group of light-emitting diodes, the second group of light-emitting diodes, and the switch control module, respectively, the color temperature of the first group of light-emitting diodes is higher than the color temperature of the second group of light-emitting diodes, and the first... The photodiode group is connected in parallel to the second light-emitting diode group, the anti-glare cover (5) is installed between the mounting case (4) and the mounting base (6), the rear case (11) is installed behind the mounting case (4), a support structure (12) is provided at the bottom end of the rear case (11), the lighting fixture further includes a DIP switch (13), the DIP switch (13) includes an operating mechanism and a contact assembly connected thereto, a square groove is provided on the outer surface of the rear case (11), the operating mechanism is installed in the square groove and penetrates the rear case (11), the contact assembly is connected to a switching power supply circuit on a circuit board, a plurality of anti-slip strips are provided on the surface of the operating mechanism, the DIP switch (13) includes five stages, and the switching power supply circuit further includes a color temperature adjustment circuit. The aforementioned color temperature control circuit is A group of diodes, wherein the group of diodes includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode, A group of resistors, wherein the group of resistors includes a first resistor, a second resistor, a third resistor, and a fourth resistor, A first stage circuit, which is connected to the first stage of the DIP switch and is configured such that the first group of light-emitting diodes and the switch control module are directly connected, A second stage circuit, which is connected to the second stage of the DIP switch, and is configured such that the first group of light-emitting diodes and the second group of light-emitting diodes are each connected to a diode group, a resistor group, and a switch control module, A third stage circuit, which is connected to the third stage of the DIP switch, and is configured such that the first group of light-emitting diodes and the second group of light-emitting diodes are each connected to a diode group, a resistor group, and a switch control module, A fourth-stage circuit, which is connected to the fourth stage of the DIP switch, and is configured such that the first group of light-emitting diodes and the second group of light-emitting diodes are each connected to a diode group, a resistor group, and a switch control module, A fifth stage circuit, which is connected to the fifth stage of the DIP switch and includes a fifth stage circuit configured by directly connecting the second group of light-emitting diodes and the switch control module, A lighting fixture that achieves color temperature adjustment using a switch characterized by the following features.
2. The second stage circuit includes the following: a first group of light-emitting diodes is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to a switch control module, a second group of light-emitting diodes is connected to the positive terminal of the sixth diode, the negative terminal of the sixth diode is connected to the positive terminal of the fifth diode, the negative terminal of the fifth diode is connected to a third resistor, the other end of the third resistor is connected to the positive terminal of the third diode, the negative terminal of the third diode is connected to a second resistor, and the other end of the second resistor is connected to a switch control module. The three-stage circuit includes the following: a first group of light-emitting diodes is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the positive terminal of the second diode, the negative terminal of the second diode is connected to the first resistor, the other end of the first resistor is connected to a switch control module, a second group of light-emitting diodes is connected to the positive terminal of the sixth diode, the negative terminal of the sixth diode is connected to the positive terminal of the fifth diode, the negative terminal of the fifth diode is connected to the third resistor, and the other end of the third resistor is connected to a switch control module. The fourth stage circuit includes: a first group of light-emitting diodes connected to the positive terminal of the first diode, the negative terminal of the first diode connected to the positive terminal of the second diode, the negative terminal of the second diode connected to the first resistor, the other end of the first resistor connected to the positive terminal of the fourth diode, the negative terminal of the fourth diode connected to the fourth resistor, the other end of the fourth resistor connected to a switch control module, a second group of light-emitting diodes connected to the positive terminal of the sixth diode, and the negative terminal of the sixth diode connected to a switch control module. A lighting fixture that achieves color temperature adjustment by a switch as described in feature 1.
3. The switch control module includes a first pin, a second pin, a third pin, a fourth pin, and a fifth pin, wherein the first pin controls the first stage circuit, the second pin controls the second stage circuit, the third pin controls the third stage circuit, the fourth pin controls the fourth stage circuit, and the fifth pin controls the fifth stage circuit, as described in claim 1, a lighting fixture that achieves color temperature adjustment by a switch.
4. A lighting fixture that achieves color temperature adjustment by a switch as described in claim 3, characterized in that the first pin is connected to the positive terminal of the first group of light-emitting diodes and the first diode, the second pin is connected to the negative terminal of the first diode, the positive terminal of the second diode and the second resistor, the third pin is connected to one end of the first resistor, the positive terminal of the third diode, the positive terminal of the fourth diode and the third resistor, the fourth pin is connected to the fourth resistor, the positive terminal of the fifth diode and the negative terminal of the sixth diode, and the fifth pin is connected to the positive terminal of the second group of light-emitting diodes and the sixth diode, respectively.
5. A lighting fixture that achieves color temperature adjustment by a switch as described in claim 1, characterized in that a plurality of anti-glare steps (7) are installed inside the anti-glare cover (5), and the plurality of anti-glare steps (7) are connected in sequence.
6. The lighting fixture that achieves color temperature adjustment by a switch, characterized in that the anti-glare step (7) includes a connecting edge (8), a fillet transition section (9), and a diffusion edge (10), and the connecting edge (8), the fillet transition section (9), and the diffusion edge (10) are connected in order.
7. The lighting fixture that achieves color temperature adjustment by a switch according to claim 6, characterized in that the connecting edge (8) is perpendicular to the central axis of the lamp housing (1).
8. The lighting fixture that achieves color temperature adjustment by a switch, characterized in that the angle between the diffuser edge (10) and the central axis of the lamp housing (1) is between 9° and 11°, as described in claim 6.
9. A lighting fixture that achieves color temperature adjustment by a switch, characterized in that the total color temperature of the first stage circuit is 5000K, the total color temperature of the second stage circuit is 4000K, the total color temperature of the third stage circuit is 3500K, the total color temperature of the fourth stage circuit is 3000K, and the total color temperature of the fifth stage circuit is 2700K.
10. The rectifier filter circuit includes at least a seventh diode, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, and a first filter capacitor, wherein the positive terminal of the seventh diode is connected to the first capacitor, the negative terminal is connected to the first resistor and the positive terminal of the power supply output terminal, the other end of the positive terminal of the power supply output terminal is connected to a first group of light-emitting diodes and a second group of light-emitting diodes, the other end of the first capacitor is connected to the first resistor, the positive terminal of the first filter capacitor is connected to the negative terminal of the seventh diode, the negative terminal of the first filter capacitor is connected to one end of the second capacitor and the negative terminal of the power supply output terminal, the other end of the second capacitor is grounded, and one end of the fifth resistor is connected to the negative terminal of the seventh diode, and the other end is connected to the negative terminal of the power supply output terminal and grounded, characterized in that a lighting fixture that achieves color temperature adjustment by a switch according to any one of claims 1 to 9.