Control circuit of light-emitting knob lamp

Abstract

The control circuit of the light-emitting knob lamp comprises a power supply, and further comprises a control chip and N knob switches which are respectively connected with the power supply, N is an integer greater than 1, potential signal output pins of the N knob switches are respectively connected to the control chip, and the control chip is connected with the power supply. Any one of the N knob switches is provided with a first light source control branch circuit and a second light source control branch circuit, power supply ports of the first light source control branch circuit and the second light source control branch circuit are connected to a power supply, and the first light source control branch circuit and the second light source control branch circuit are provided with control input pins respectively. Control input pins of the first light source control branch and the second light source control branch are respectively connected to the control chip; the control circuit of the light-emitting knob lamp is simple in structure and low in energy consumption, the presented light state is simple, a user can quickly understand the light state conveniently, and the user experience is high.

Description

Technical Field

[0001] The utility model relates to the technical field of the circuit of a light-emitting knob lamp, and particularly relates to a control circuit of a light-emitting knob lamp. Background Art

[0002] At present, in order to improve the convenience of user operation and visual feedback of an oven / roaster, many electric ovens are equipped with light-emitting knobs to enhance the selling points of the product and the user experience.

[0003] However, the control circuit of the light-emitting knob of the existing electric oven has the following disadvantages:

[0004] The control circuit of its light-emitting knob is complex in structure, consumes too much energy, and its light-emitting state is complex, resulting in that it is difficult for users to understand the working state of the light-emitting knob and the user experience is poor. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the above-mentioned defects in the prior art, and provide a control circuit of a light-emitting knob lamp. First, the control circuit is simple in structure and low in energy consumption. Second, each knob switch is equipped with two light source control branches, and the two light source control branches can form three working state light conditions, which is convenient for users to quickly understand and has a high user experience.

[0006] To achieve the above purpose, the utility model provides a control circuit of a light-emitting knob lamp, which includes a power supply, and also includes a control chip and N knob switches respectively connected to the power supply, where N is an integer greater than 1. The potential signal output pins of the N knob switches are respectively connected to the control chip. A first light source control branch and a second light source control branch are respectively installed on any one of the N knob switches. The power supply ports of the first light source control branch and the second light source control branch are respectively connected to the power supply. The first light source control branch and the second light source control branch respectively have control input pins, and the control input pins of the first light source control branch and the second light source control branch are respectively connected to the control chip.

[0007] Preferably, the power supply includes a power supply plug and a rectifier connected to the power supply plug. The power supply port of the control chip, the power supply ports of the N knob switches, the power supply port of the first light source control branch on any one of the N knob switches, and the power supply port of the second light source control branch on any one of the N knob switches are respectively connected to the DC output port of the rectifier.

[0008] Preferably, the rectifier is an ABS210 rectification chip.

[0009] Preferably, the potential signal output pins of the N knob switches, the control input pins of the first light source control branch on any one of the N knob switches, and the control input pins of the second light source control branch on any one of the N knob switches are respectively connected to the IO interfaces of the control chip.

[0010] Preferably, the first light source control branch includes several series-connected LED lamp beads and a triode. One end of the several series-connected LED lamp beads is connected to the collector pin of the triode. The power supply port of the first light source control branch is the interface between the other end of the several series-connected LED lamp beads and the emitter pin of the triode. The control input pin of the first light source control branch is the base pin of the triode.

[0011] Preferably, the second light source control branch includes several series-connected LED lamp beads and a triode. One end of the several series-connected LED lamp beads is connected to the collector pin of the triode. The power supply port of the second light source control branch is the interface between the other end of the several series-connected LED lamp beads and the emitter pin of the triode. The control input pin of the second light source control branch is the base pin of the triode.

[0012] Preferably, the N knob switches are respectively potentiometers, and the power supply port of any one of the N knob switches is the interface between the positive fixed terminal pin and the negative fixed terminal pin of this knob switch.

[0013] Preferably, a filter capacitor is connected between the positive fixed terminal pin and the negative fixed terminal pin of any one of the N knob switches.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The present utility model is provided with N knob switches, a control chip, and a first light source control branch and a second light source control branch corresponding to each knob switch respectively. Each knob switch has an ON gear and an OFF gear.

[0016] The ON gear indicates that this knob switch is in the working state, and the ON gear controls the first light source control branch to turn on.

[0017] The OFF gear needs the control chip to determine the working state of the current electric oven.

[0018] If the electric oven is in the standby state, the OFF gear controls the second light source control branch to turn on.

[0019] If the electric oven is in the shutdown state, the OFF gear controls the first light source control branch and the second light source control branch to turn off respectively.

[0020] 2. The control circuit of a light-emitting knob lamp provided by the present utility model has a simple control circuit structure, low energy consumption, and each knob switch respectively corresponds to controlling a first light source control branch and a second light source control branch. The first light source control branch and the second light source control branch can form three working states of light, which is convenient for users to quickly understand and has a high user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is the circuit diagram of a control circuit of a light-emitting knob lamp provided by an embodiment of the present utility model;

[0023] Figure 2 is the circuit diagram of a power supply provided by an embodiment of the present utility model;

[0024] Figure 3 is the circuit diagram of N knob switches provided by an embodiment of the present utility model;

[0025] Figure 4 is the circuit diagram of a control chip provided by an embodiment of the present utility model;

[0026] Figure 5 is the circuit diagram of the first light source control branch and the second light source control branch respectively corresponding to N knob switches provided by an embodiment of the present utility model.

[0027] In the figure, it includes:

[0028] PWR, power supply plug; MCU1, control chip; HALL, knob switch; O, potential signal output pin; L1, first light source control branch; L2, second light source control branch; BR1, rectifier; IC1, linear voltage regulator; C, collector pin; K, emitter pin; B, base pin; V, positive fixed terminal pin; G, negative fixed terminal pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are one of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0030] Please refer to Figures 1 to 5 , the embodiment of the present utility model provides a control circuit for a light-emitting knob lamp, including a power supply, and further including a control chip MCU1 and N knob switches HALL respectively connected to the power supply, where N is an integer greater than 1. The potential signal output pins O of the N knob switches HALL are respectively connected to the control chip MCU1. A first light source control branch L1 and a second light source control branch L2 are respectively installed on any one of the N knob switches HALL. The power supply ports of the first light source control branch L1 and the second light source control branch L2 are respectively connected to the power supply. The first light source control branch L1 and the second light source control branch L2 respectively have control input pins, and the control input pins of the first light source control branch L1 and the second light source control branch L2 are respectively connected to the control chip MCU1.

[0031] The power supply includes a power supply plug PWR and a rectifier BR1 connected to the power supply plug PWR. The power supply port of the control chip MCU1, the power supply ports of the N knob switches HALL, the power supply port of the first light source control branch L1 on any one of the N knob switches HALL, and the power supply port of the second light source control branch L2 on any one of the N knob switches HALL are respectively connected to the DC output port of the rectifier BR1.

[0032] The rectifier BR1 is an ABS210 rectifier chip.

[0033] A linear voltage regulator IC1 is connected between the power supply port of the control chip MCU1, the power supply ports of the N knob switches HALL, and the DC output port of the rectifier BR1.

[0034] The linear voltage regulator IC1 is a 78M05 voltage regulator chip.

[0035] The potential signal output pins O of the N knob switches HALL, the control input pins of the first light source control branch L1 on any one of the N knob switches HALL, and the control input pins of the second light source control branch L2 on any one of the N knob switches HALL are respectively connected to the IO interfaces of the control chip MCU1.

[0036] The first light source control branch L1 includes several series-connected LED lamp beads and a triode. One end of the several series-connected LED lamp beads is connected to the collector pin C of the triode. The power supply port of the first light source control branch L1 is the interface between the other end of the several series-connected LED lamp beads and the emitter pin K of the triode. The control input pin of the first light source control branch L1 is the base pin B of the triode.

[0037] The second light source control branch L2 includes several series-connected LED lamp beads and a triode. One end of the several series-connected LED lamp beads is connected to the collector pin C of the triode. The power supply port of the second light source control branch L2 is the interface between the other end of the several series-connected LED lamp beads and the emitter pin K of the triode. The control input pin of the second light source control branch L2 is the base pin B of the triode.

[0038] The N knob switches HALL are potentiometers respectively. The power supply port of any one of the N knob switches HALL is the interface between the positive fixed terminal pin V and the negative fixed terminal pin G of this knob switch HALL.

[0039] A filter capacitor is connected between the positive fixed terminal pin V and the negative fixed terminal pin G of any one of the N knob switches HALL. This filter capacitor serves to stabilize the signal of the potential signal output pin O of the knob switch HALL.

[0040] The power supply port of the control chip MCU1 is the interface between the VDD pin and the VSS pin of the control chip MCU1.

[0041] A control circuit of a light-emitting knob lamp according to an embodiment of the present invention has the following working principle:

[0042] S0: A control circuit of a light-emitting knob lamp according to an embodiment of the present invention is specifically applied to an electric oven. Its control chip MCU1 is installed on the circuit integration board inside the electric oven, and its knob switch HALL is installed on the installation panel on the side wall of the electric oven. Inside the cavity of any one of the knob switches HALL, several series-connected LED lamp beads of the first light source control branch L1 and several series-connected LED lamp beads of the second light source control branch L2 are sequentially arranged in a ring. This electric oven has three working states, namely: working state, standby state, and shutdown state. The knob switch HALL has two gears, which are the ON gear and the OFF gear respectively.

[0043] If its control chip MCU1 detects that at least one knob switch HALL is in the ON gear, it is determined to be in the working state.

[0044] When all the knob switches HALL are turned to the OFF position instantaneously, its control chip MCU1 first determines it as the standby state. Then, the control chip MCU1 will be in a countdown state. If, within the countdown state, any of the knob switches HALL is turned to the ON position, the control chip MCU1 determines it as the working state; otherwise, when the countdown ends, the control chip MCU1 determines it as the end-of-work state.

[0045] S1: When at least one of the knob switches HALL is in the ON position, the control chip MCU1 determines it as the working state. At this time, the knob switch HALL in the ON position sends the first control signal to the control chip MCU1 through its control input pin. After receiving the first control signal, the control chip MCU1 controls the opening of the first light source control branch L1 corresponding to this knob switch HALL through the control input pin of the first light source control branch L1. Several series-connected LED lamp beads on the first light source control branch L1 emit white light, so as to let the user know that this knob switch HALL is in the working state.

[0046] When the other knob switches HALL are in the OFF position, the knob switches HALL in the OFF position send the second control signal to the control chip MCU1 through their control input pins. After receiving the second control signal, the control chip MCU1 controls the opening of the second light source control branch L2 corresponding to this knob switch HALL through the control input pin of the second light source control branch L2. Several series-connected LED lamp beads on the second light source control branch L2 emit red light, so as to let the user know that this knob switch HALL is not in the working state.

[0047] S2: When all the knob switches HALL are turned to the OFF position instantaneously, its control chip MCU1 first determines it as the standby state. At this time, the control chip MCU1 will be in a countdown state. During the countdown state, all the knob switches HALL in the OFF position send the second control signal to the control chip MCU1 through their control input pins. After receiving the second control signal, the control chip MCU1 controls the opening of the second light source control branch L2 corresponding to this knob switch HALL through the control input pin of the second light source control branch L2. Several series-connected LED lamp beads on the second light source control branch L2 emit red light, so as to let the user know that all the knob switches HALL are in the standby state.

[0048] If, within the countdown state, any of the knob switches HALL is turned to the ON position, the control chip MCU1 determines it as the working state and then jumps to step S1.

[0049] If the countdown ends, the control chip MCU1 determines that it is in the end-of-operation state. At this time, the control chip MCU1 disconnects the control of all the first light source control branches L1 and the second light source control branches L2, so that several series-connected LED lamp beads on the first light source control branch L1 and several series-connected LED lamp beads on the second light source control branch L2 are all not lit, so as to let the user know that all the rotary switches HALL are in the shutdown state.

[0050] The advantages of the control circuit of a light-emitting rotary knob lamp according to an embodiment of the present invention are as follows: the control circuit has a simple structure, low energy consumption, and the presented light state is simple and easy for the user to quickly understand, providing a high user experience.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A control circuit for a light-emitting knob lamp, including a power supply, characterized in that, It further includes a control chip (MCU1) and N knob switches (HALL) respectively connected to a power supply, where N is an integer greater than 1. The potential signal output pins (O) of the N knob switches (HALL) are respectively connected to the control chip (MCU1). On any one of the N knob switches (HALL), a first light source control branch (L1) and a second light source control branch (L2) are respectively installed. The power supply ports of the first light source control branch (L1) and the second light source control branch (L2) are respectively connected to the power supply. The first light source control branch (L1) and the second light source control branch (L2) each have a control input pin, and the control input pins of the first light source control branch (L1) and the second light source control branch (L2) are respectively connected to the control chip (MCU1).

2. The control circuit of a light-emitting knob lamp according to claim 1, characterized in that, The power supply includes a power supply plug (PWR) and a rectifier (BR1) connected to the power supply plug (PWR). The power supply port of the control chip (MCU1), the power supply ports of the N knob switches (HALL), the power supply port of the first light source control branch (L1) on any one of the N knob switches (HALL), and the power supply port of the second light source control branch (L2) on any one of the N knob switches (HALL) are respectively connected to the DC output port of the rectifier (BR1).

3. The control circuit of a light-emitting knob lamp according to claim 2, characterized in that, The rectifier (BR1) is an ABS210 rectifier chip.

4. The control circuit of a light-emitting knob lamp according to claim 2, characterized in that, A linear voltage regulator (IC1) is connected between the power supply port of the control chip (MCU1), the power supply ports of the N knob switches (HALL), and the DC output port of the rectifier (BR1).

5. The control circuit of a light-emitting knob lamp according to claim 4, characterized in that, The linear voltage regulator (IC1) is a 78M05 voltage regulator chip.

6. The control circuit of a light-emitting knob lamp according to claim 1, characterized in that, The potential signal output pins (O) of the N knob switches (HALL), the control input pin of the first light source control branch (L1) on any one of the N knob switches (HALL), and the control input pin of the second light source control branch (L2) on any one of the N knob switches (HALL) are respectively connected to the IO interface of the control chip (MCU1).

7. The control circuit of a light-emitting knob lamp according to claim 1, characterized in that, The first light source control branch (L1) includes a plurality of serially connected LED lamp beads and a triode. One end of the plurality of serially connected LED lamp beads is connected to the collector pin (C) of the triode. The power supply port of the first light source control branch (L1) is the interface between the other end of the plurality of serially connected LED lamp beads and the emitter pin (K) of the triode. The control input pin of the first light source control branch (L1) is the base pin (B) of the triode.

8. The control circuit of a light-emitting knob lamp according to claim 1, characterized in that, The second light source control branch (L2) includes a plurality of series-connected LED lamp beads and a triode. One end of the plurality of series-connected LED lamp beads is connected to the collector pin (C) of the triode. The power supply port of the second light source control branch (L2) is the interface between the other end of the plurality of series-connected LED lamp beads and the emitter pin (K) of the triode. The control input pin of the second light source control branch (L2) is the base pin (B) of the triode.

9. The control circuit of a light-emitting knob lamp according to claim 1, characterized in that, The N knob switches (HALL) are respectively potentiometers. The power supply port of any one of the N knob switches (HALL) is the interface between the positive fixed terminal pin (V) and the negative fixed terminal pin (G) of this knob switch (HALL).

10. The control circuit of a light-emitting knob lamp according to claim 9, characterized in that, A filter capacitor is connected between the positive fixed terminal pin (V) and the negative fixed terminal pin (G) of any one of the N knob switches (HALL).

Images