LED bulb capable of adjusting brightness through single switch

Abstract

An LED bulb capable of adjusting brightness through a single switch comprises the switch, a constant current source unit connected with the switch, a first LED set connected with the constant current source unit, a second LED set connected with the constant current source unit and a bistable circuit electrically connected with the constant current source unit and the second LED set, and the bistable circuit is used for controlling the second LED set to be turned on and turned off. According to the scheme, light emitting is achieved through the first LED set and the second LED set. The bistable circuit is connected with the power storage loop, and the power storage loop is connected with the constant current source unit. According to the LED bulb capable of adjusting the brightness through the single switch, the brightness of the bulb can be adjusted without arranging a plurality of switches, the operation of adjusting the brightness is facilitated, the cost required by purchasing the switches is also saved, and the practicability is improved.

Description

Technical Field

[0001] The utility model belongs to the field of lighting appliances, and particularly designs an LED bulb whose brightness can be adjusted by a single switch. Background Technique

[0002] As is well known, lighting is one of the main applications of electricity, and bulbs are the most widely used electrical appliances. However, for ordinary bulbs, their luminous brightness is fixed and determined by the rated power during production. For example, the commonly used ordinary tungsten filament incandescent bulbs have been like this for hundreds of years since their invention. Ordinary bulbs only have a single set of light-emitting bodies, so their luminous brightness is fixed. For example, the currently popular LED bulbs have a constant current source and a set of LEDs (light-emitting diodes) built-in. The constant current source provides a stable current to the LED group to ensure the normal light-emitting operation of the LED group. The number of single LEDs determines the luminous brightness and the power of the bulb.

[0003] In a lighting environment, to change the ambient lighting brightness, people can only install two or more bulbs, which are respectively controlled by two switches; or use a complex dimming switch to achieve the purpose of controlling the ambient brightness. For example, in the living room environment of a home, a lower brightness is needed when watching TV. And a stronger light is needed when reading or sitting idle. For the lights in the bedroom, a weak night light is needed for getting up at night for convenience. In short, to change the ambient illuminance, the number of bulbs and switches needs to be added, which not only increases the cost but also is inconvenient. Therefore, in order to save costs and facilitate operation, a bulb that can adjust its brightness through a single switch is needed, and the utility model solves this technical problem. Content of the Utility Model

[0004] The utility model provides an LED bulb whose brightness can be adjusted by a single switch, which does not need to set multiple switches to realize the adjustment of the bulb brightness, facilitates the operation of adjusting the brightness, and also saves the cost required to purchase switches, improving the practicability.

[0005] An LED bulb whose brightness can be adjusted by a single switch includes a switch, a constant current source unit connected to the switch, a first LED group connected to the constant current source unit, a second LED group connected to the constant current source unit, and a bistable circuit electrically connected to the constant current source unit and the second LED group. The bistable circuit is used to control the lighting and extinguishing of the second LED group.

[0006] Further, the bistable circuit is connected to a power storage circuit, and the power storage circuit is connected to the constant current source unit.

[0007] Further, the bistable circuit is connected to a coupling capacitor, and the coupling capacitor is connected to the constant current source unit.

[0008] Further, the output end of the bistable circuit is electrically connected to a switching triode, and the switching triode is connected to the second LED group.

[0009] Further, the power storage circuit includes a diode connected to the constant current source unit, an energy storage capacitor connected to the diode, and the energy storage capacitor is connected to the bistable circuit.

[0010] Further, the bistable circuit is connected to a protection resistor, and the protection resistor is connected to the switching triode.

[0011] The technical effects of the present utility model are as follows:

[0012] (1) In this solution, the lighting and extinguishing of the first LED group and the second LED group are directly controlled by a switch. When the brightness needs to be adjusted, the switch can be started and stopped in a short time. The energy storage circuit will provide power for the bistable circuit for a short time. The coupling capacitor can obtain trigger pulses from the constant current source when the switch is turned on and off, triggering the bistable circuit to flip, thereby changing the level output by the bistable circuit to achieve the conduction or cutoff of the switching triode, and thus realizing the control of the lighting and extinguishing of the second LED group, achieving the control of the brightness of the light bulb with only a single switch, with simple operation and no need to purchase multiple switches, improving the practicability;

[0013] (2) The structure of this solution is simple and can be installed without the operation of professional personnel, and the original switch can still be used, thus saving the procurement cost and labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the circuit diagram of the present utility model.

[0015] Among them, the brief description of the drawings is as follows: 1. Switch; 2. Constant current source unit; 3. Coupling capacitor; 4. Diode; 5. First LED group; 6. Second LED group; 7. Switching triode; 8. Energy storage capacitor; 9. Bistable circuit; 10. Protection resistor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments and the accompanying drawings.

[0017] See Figure 1, an LED bulb with a single switch for brightness adjustment, comprising a switch 1, a constant current source unit 2 connected to the switch 1, a first LED group 5 connected to the constant current source unit 2, a second LED group 6 connected to the constant current source unit 2, and a bistable circuit 9 electrically connected to the constant current source unit 2 and the second LED group 6. The bistable circuit 9 is used to control the lighting and extinguishing of the second LED group 6. In this solution, light emission is achieved through the first LED group 5 and the second LED group 6. Both the constant current source unit 2 and the bistable circuit 9 are basic units of mature electronic circuits and will not be elaborated in detail here. The first LED group 5 can be directly controlled by the switch 1, and the second LED group 6 needs to be controlled through the bistable circuit 9. The switch 1 in this embodiment is a common switch 1 installed on the wall, and the rest of the circuit components are all installed and fixed on the PCB circuit board and placed inside the bulb.

[0018] In this embodiment, the first LED group 5 and the second LED group 6 are each composed of two light-emitting diodes 4. According to the actual situation, one or more can also be selected, and the quantity is not limited here.

[0019] Furthermore, the bistable circuit 9 is connected to a power storage circuit, and the power storage circuit is connected to the constant current source unit 2.

[0020] Furthermore, the bistable circuit 9 is connected to a coupling capacitor 3, and the coupling capacitor 3 is connected to the constant current source unit 2.

[0021] Furthermore, the output terminal of the bistable circuit 9 is electrically connected to a switching triode 7, and the switching triode 7 is connected to the second LED group 6.

[0022] Furthermore, the power storage circuit includes a diode 4 connected to the constant current source unit 2, an energy storage capacitor 8 connected to the diode 4, and the energy storage capacitor 8 is connected to the bistable circuit 9.

[0023] Furthermore, the bistable circuit 9 is connected to a protection resistor 10, and the protection resistor 10 is connected to the switching triode 7.

[0024] The working process of the present utility model is as follows:

[0025] After the switch 1 is closed, the constant current source unit 2 outputs a stable current, and the first LED group 5 is directly lit. Since the second LED group 6 is controlled by the bistable circuit 9, when the output terminal of the bistable circuit 9 outputs a high level, the switching triode 7 electrically connected to it will conduct, causing the second LED group 6 to light up, so that both the first LED group 5 and the second LED group 6 are lit. At this time, the bulb is in the full-bright state;

[0026] When it is necessary to dim the brightness or lower the brightness for energy conservation, the switch 1 needs to be turned off and then turned on once within a short period of time. In this embodiment, the time is three seconds. When the switch 1 is disconnected, the power storage circuit will provide normal power supply to the bistable circuit 9 for three seconds. And when the switch 1 is turned on and off, the coupling capacitor 3 will obtain a trigger pulse from the constant current source unit 2 to trigger the bistable circuit 9 to flip, so that its output terminal outputs a low level, causing the switching triode 7 to cut off. After the switch 1 is turned on, the second LED group 6 goes out and the first LED group 5 lights up, and the bulb becomes dim light, thus realizing the change of two levels of illumination brightness and realizing the adjustment of the bulb brightness through a single switch 1.

[0027] The above embodiments are only the preferred embodiments of the present invention. Those skilled in the art can obtain other embodiments from the above embodiments without creative efforts. Therefore, the scope protected by this application is not only the above embodiments, but the scope consistent with the principles and features of this application.

Claims

1. An LED light bulb with a single switch to adjust brightness, characterized in that: The invention comprises a switch (1), a constant current source unit (2) connected to the switch (1), a first LED group (5) connected to the constant current source unit (2), a second LED group (6) connected to the constant current source unit (2), and a bistable circuit (9) electrically connected to the constant current source unit (2) and the second LED group (6), wherein the bistable circuit (9) is used to control the lighting and extinguishing of the second LED group (6).

2. The LED light bulb with single switch to adjust brightness according to claim 1, characterized in that: The bistable circuit (9) is connected to a power storage circuit, and the power storage circuit is connected to the constant current source unit (2).

3. The LED light bulb with brightness adjustable by a single switch according to claim 1, characterized in that: The bistable circuit (9) is connected to a coupling capacitor (3), and the coupling capacitor (3) is connected to the constant current source unit (2).

4. The LED light bulb with brightness adjustable by a single switch according to claim 1, characterized in that: The output end of the bistable circuit (9) is electrically connected to the switch transistor (7), and the switch transistor (7) is connected to the second LED group (6).

5. The LED light bulb with brightness adjustable by a single switch according to claim 2, characterized in that: The power storage circuit comprises a diode (4) connected to the constant current source unit (2), an energy storage capacitor (8) connected to the diode (4), and the energy storage capacitor (8) is connected to the bistable circuit (9).

6. The LED light bulb with brightness adjustable by a single switch according to claim 4, characterized in that: The bistable circuit (9) is connected to a protective resistor (10), and the protective resistor (10) is connected to the switch transistor (7).

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