CN216752180U - Lamp control circuit and electrical equipment - Google Patents
Lamp control circuit and electrical equipment Download PDFInfo
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- CN216752180U CN216752180U CN202122704254.XU CN202122704254U CN216752180U CN 216752180 U CN216752180 U CN 216752180U CN 202122704254 U CN202122704254 U CN 202122704254U CN 216752180 U CN216752180 U CN 216752180U
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Abstract
The utility model is used in the technical field of electronic circuits, and provides a lamp control circuit and electrical equipment, wherein the circuit comprises a plurality of light-emitting elements which are connected in series; and at least one control port connected to a connection line between two adjacent light emitting elements for controlling each light emitting element to be lit individually or a plurality of light emitting elements to be lit simultaneously. The embodiment of the utility model comprises a plurality of light-emitting elements and at least one control port, wherein the plurality of light-emitting elements are connected in series, the at least one control port is respectively connected with the connecting lines between two adjacent light-emitting elements in a one-to-one correspondence manner, so that each light-emitting element is controlled to be lightened or the plurality of light-emitting elements are controlled to be lightened simultaneously, and the number of the control ports is less than that of the light-emitting elements, so that the control port resources are saved.
Description
Technical Field
The utility model belongs to the technical field of electronic circuits, and particularly relates to a lamp control circuit and electrical equipment.
Background
Along with the development of science and technology, the function of electrical equipment is more and more abundant, gives people the aspect of life and provides convenience. Wherein partial electrical equipment is from taking the pilot lamp to indicate electrical equipment's state or provide the illumination for the user, for example refrigerator, microwave oven and oven etc. and its internally mounted has the pilot lamp, and in electrical equipment working process, for example when the user opened the refrigerator door or opened the oven door, the pilot lamp in the electrical equipment can light automatically and throw light on, and the user uses and experiences well.
However, the existing electrical equipment mainly controls the indicator lamps through the control chip, several indicator lamps in the electrical equipment need to occupy the IO ports of the corresponding number of the control chip, and for the control chips with fewer IO ports, the IO port resources of the control chip are deficient, and even the situation that the IO ports are not enough and the circuit layout cannot be completed occurs.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a lamp control circuit, and aims to solve the problem that IO port resources are insufficient due to the fact that corresponding number of IO ports need to be occupied for controlling indicator lamps in electrical equipment.
An embodiment of the present invention provides a lamp control circuit, including:
a plurality of light emitting elements connected in series;
and at least one control port connected to a connection line between two adjacent light emitting elements for controlling each light emitting element to be lit individually or a plurality of light emitting elements to be lit simultaneously.
Alternatively, the control port outputs a level signal to control each light emitting element to be lit individually or a plurality of light emitting elements to be lit simultaneously, the level signal being a high level or a low level corresponding to a connection position of the control port in a serial body composed of the plurality of light emitting elements.
Optionally, the circuit further comprises a current limiting resistor connected in series with the plurality of light emitting elements in a one-to-one correspondence.
Optionally, the circuit comprises a control chip, the control chip comprising the at least one control port.
In a second aspect, the present application further provides an electrical apparatus, which includes the lamp control circuit as described above.
The embodiment of the utility model comprises a plurality of light-emitting elements and at least one control port, wherein the plurality of light-emitting elements are connected in series, the at least one control port is respectively connected with the connecting lines between two adjacent light-emitting elements in a one-to-one correspondence manner, so that each light-emitting element is controlled to be lightened or the plurality of light-emitting elements are controlled to be lightened simultaneously, and the number of the control ports is less than that of the light-emitting elements, so that the control port resources are saved.
Drawings
Fig. 1 is a schematic circuit structure diagram of an embodiment of a lamp control circuit according to the present invention;
fig. 2 is a schematic circuit structure diagram of another embodiment of a lamp control circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Several indicator lamps in the existing electrical equipment need to occupy IO ports of the control chip with corresponding quantity, so that the IO port resource of the control chip is in shortage, and even the condition that the IO port is not enough and the circuit layout cannot be completed occurs. The number of the control ports is less than that of the light-emitting elements, so that the control port resources are saved.
Example one
In some optional embodiments, as shown in fig. 1 to 2, an embodiment of the present application provides a luminaire control circuit, including:
a plurality of light emitting elements connected in series;
and at least one control port connected to a connection line between two adjacent light emitting elements for controlling each light emitting element to be lit individually or a plurality of light emitting elements to be lit simultaneously.
Optionally, a plurality of light emitting elements are sequentially connected in series to form a series body, and optionally, the light emitting elements may adopt light emitting diodes, bulbs, light tubes and other light emitting components, which is not particularly limited herein.
In some embodiments, one end of the series body is connected to the power supply terminal VCC, and the other end of the series body may be grounded, and optionally, the power supply terminal VCC may employ a battery, a switching power supply, or another power supply or circuit capable of outputting a stable voltage signal, which is not particularly limited herein. In implementation, the voltage of the power supply terminal VCC may be set according to requirements and parameters of a plurality of light emitting elements, for example, taking the operating voltage of the light emitting element as x, the voltage of the power supply terminal VCC is m × x, where m is the number of the light emitting elements.
The circuit comprises at least one control port, the at least one control port is respectively connected to a connecting line between two adjacent light-emitting elements, when the circuit is implemented, the control port outputs a level signal to control each light-emitting element to be independently lightened or a plurality of light-emitting elements to be lightened simultaneously, and the level signal is a high level or a low level corresponding to the connecting position of the control port in a serial body formed by the plurality of light-emitting elements. The high level or low level voltage output by each control port can be set according to the connection position of the control port in the series connection body, specifically, the light emitting elements are sequentially sequenced from m to 1 from the place close to the power supply terminal VCC to the grounding terminal, the control ports are sequentially sequenced from (m-1) to 1 from the place close to the power supply terminal VCC to the grounding terminal, the voltage of the power supply terminal VCC is m x, when the level signal output by the control port is high level, the level signal is greater than (m-1) x, and when the level signal output by the control port is low level, the level signal is less than (m-1) x.
Illustratively, taking the circuit including two light emitting elements as an example, as shown in fig. 1, the light emitting elements adopt light emitting diodes, namely a first light emitting diode LED1 and a second light emitting diode LED2, wherein an anode of the first light emitting diode LED1 is connected to the power supply terminal VCC, a cathode of the first light emitting diode LED1 is connected to an anode of the second light emitting diode LED2, and a cathode of the second light emitting diode LED2 is grounded. The circuit further comprises a control port MCU _ IO connected to the cathode of the first light emitting diode LED 1.
When the control port MCU _ IO is low, the first light emitting diode LED1 is lit and the second light emitting diode LED2 is not lit.
When the control port MCU _ IO is high, the first light emitting diode LED1 is not lit and the second light emitting diode LED2 is lit.
When the control port MCU _ IO is switched between the high level and the low level fast scan, both the first light emitting diode LED1 and the second light emitting diode LED2 are turned on.
Alternatively, the high level and the low level in the embodiment of the present application may be set according to the type of the light emitting element and the position of the light emitting element, for example, taking the above-mentioned first light emitting diode LED1 and the second light emitting diode LED2 as an example, where the turn-on voltage of the first light emitting diode LED1 and the second light emitting diode LED2 is Vf, when the voltage of the power supply terminal VCC is 2Vf, the high level > Vf, and the low level < Vf. When the control port MCU _ IO is at a low level, for example, the low level is 0.8Vf, at this time, the voltage difference between the two ends of the first light emitting diode LED1 is 1.2Vf, the first light emitting diode LED1 is turned on, and the voltage difference between the two ends of the second light emitting diode LED2 is 0.8Vf, and the second light emitting diode LED2 is not turned on. Similarly, when the control port MCU _ IO is at a high level, for example, the high level is 1.5Vf, at this time, the voltage difference between the two ends of the first light emitting diode LED1 is 0.5Vf, the first light emitting diode LED1 is not lit, the voltage difference between the two ends of the second light emitting diode LED2 is 1.5Vf, and the second light emitting diode LED2 is lit.
Optionally, the voltage of the power supply terminal VCC may also be less than m × x, or the first light emitting diode LED1 and the second light emitting diode LED2 are further described above, the turn-on voltage of the first light emitting diode LED1 and the turn-on voltage of the second light emitting diode LED2 are Vf, when the voltage of the power supply terminal VCC is less than 2Vf, for example, the voltage of the power supply terminal VCC is 1.8Vf, when the control port MCU _ IO is low level, for example, the low level is zero, at this time, the voltage difference between two ends of the first light emitting diode LED1 is 1.8Vf, the first light emitting diode LED1 is turned on, the voltage difference between two ends of the second light emitting diode LED2 is zero, and the second light emitting diode LED2 is not turned on. When the control port MCU _ IO is at a high level, for example, the high level is 1.4Vf, at this time, the voltage difference between the two ends of the first light emitting diode LED1 is 0.4Vf, the first light emitting diode LED1 is not turned on, and the voltage difference between the two ends of the second light emitting diode LED2 is 1.4Vf, and the second light emitting diode LED2 is turned on. When the control port MCU _ IO is fast-scanned at the high level and the low level, both the first light emitting diode LED1 and the second light emitting diode LED2 are turned on. When the control port MCU _ IO is in a high impedance state (open circuit), the voltage of the power supply terminal VCC is lower than 2Vf, and at this time, neither the first light emitting diode LED1 nor the second light emitting diode LED2 is bright.
The embodiment of the application comprises a plurality of light-emitting elements and at least one control port, wherein the plurality of light-emitting elements are connected in series, the at least one control port is respectively connected with a connecting line between two adjacent light-emitting elements in a one-to-one correspondence manner, so that the light-emitting elements are controlled to be lightened or the plurality of light-emitting elements are controlled to be lightened simultaneously, the number of the control ports is less than that of the light-emitting elements, and therefore resources of the control ports are saved.
Example two
In some optional embodiments, the lamp control circuit provided by the present application further includes a current limiting resistor connected in series with the plurality of light emitting elements in a one-to-one correspondence. For example, the light emitting element includes a first light emitting diode LED1 and a second light emitting diode LED2, as shown in fig. 1, the current limiting resistor includes a first resistor R1 and a second resistor R2, wherein the power supply terminal VCC is grounded through the first resistor R1, the first light emitting diode LED1, the second resistor and the second light emitting diode LED2 in sequence, the current in the circuit is limited through the current limiting resistor, the first light emitting diode LED1 or the second light emitting diode LED2 is prevented from being damaged due to an excessive current, and the circuit is protected from being safe.
Optionally, the circuit comprises a control chip U1, said control chip U1 comprising said at least one control port. In some embodiments, the control port is a chip IO port of the control chip U1. Illustratively, as shown in fig. 2, the light emitting module 200 includes a first resistor R1, a second resistor R2, and a third resistor R3, the light emitting element includes a first light emitting diode LED1, a second light emitting diode LED2, and a third light emitting diode LED3, and the power supply terminal VCC is grounded after being connected in series through the first resistor R1, the first light emitting diode LED1, the second resistor R2, the second light emitting diode LED2, the third resistor R3, and the third light emitting diode LED3 in sequence. The control chip U1 includes a first control port MCU _ IO1 and a second control port MCU _ IO2, the first control port MCU _ IO1 is connected to the first light emitting diode LED1 and the second resistor R2 by wires, and the second control port MCU _ IO2 is connected to the second light emitting diode LED2 and the third resistor R3 by wires.
Optionally, the first control port MCU _ IO1 and the second control port MCU _ IO2 of the control chip U1 control on and off of the first light emitting diode LED1, the second light emitting diode LED2 and the third light emitting diode LED3, illustratively, the voltage of the power supply terminal VCC is less than 3Vf, for example, the voltage of the power supply terminal VCC is set to 2.9Vf, the level signals output by the first control port MCU _ IO1 and the second control port MCU _ IO2 may be set according to requirements and parameters of the light emitting element, for example, the level signal output by the first control port MCU _ IO1 includes a first high level and a first low level, and the level signal output by the second control port MCU _ IO2 includes a second high level and a second low level.
When the first control port MCU _ IO1 is at the first high level, for example, the first control port MCU _ IO1 is at 2.1Vf, the first light emitting diode LED1 is not turned on, and the second light emitting diode LED2 and the third light emitting diode LED3 are both turned on, and if the second control port MCU _ IO2 is at the second high level, for example, the second control port MCU _ IO2 is at 1.2Vf, the first light emitting diode LED1 and the second light emitting diode LED2 are both turned off, and the third light emitting diode LED3 is turned on. When the first control port MCU _ IO1 is at the first low level, for example, when the first control port MCU _ IO1 is at 1.9Vf, the first light emitting diode LED1 is turned on, if the second control port MCU _ IO2 is at the second high level, for example, the second control port MCU _ IO2 is at 1.2Vf, the first light emitting diode LED1 and the third light emitting diode LED3 are turned on, and the second light emitting diode LED2 is turned off, if the second control port MCU _ OI2 is at the second level, for example, the second control port MCU _ OI2 is at 0.9Vf, the first light emitting diode LED1 and the second light emitting diode LED2 are turned on, and the third light emitting diode LED3 is turned off.
It should be noted that the above-mentioned level value is only an example, and is not a limitation of the present application, and on the contrary, in other embodiments of the present application, the level value may be set according to requirements and parameters of each light emitting element, and the on/off of each light emitting element may be controlled.
EXAMPLE III
In some optional embodiments, the present application further provides an electrical apparatus comprising a luminaire control circuit as described above.
In implementation, the electrical equipment is an electrical product with a light indication function, such as a refrigerator, a freezer, an oven, a safe, and the like, which is not specifically limited herein, and the electrical equipment is provided with the above-mentioned lamp control circuit, and the lamp control circuit includes:
a plurality of light emitting elements connected in series;
and at least one control port connected to a connection line between two adjacent light emitting elements for controlling each light emitting element to be lit individually or a plurality of light emitting elements to be lit simultaneously.
Optionally, a plurality of light emitting elements are sequentially connected in series to form a series body, and optionally, the light emitting elements may adopt light emitting diodes, bulbs, light tubes and other light emitting components, which is not limited herein.
In some embodiments, one end of the series body is connected to the power supply terminal VCC, and the other end of the series body may be grounded, and optionally, the power supply terminal VCC may employ a battery, a switching power supply, or another power supply or circuit capable of outputting a stable voltage signal, which is not particularly limited herein. In implementation, the voltage of the power supply terminal VCC may be set according to requirements and parameters of a plurality of light emitting elements, for example, taking the operating voltage of the light emitting element as x, the voltage of the power supply terminal VCC is m × x, where m is the number of the light emitting elements.
The circuit comprises at least one control port, the at least one control port is respectively connected to a connecting circuit between two adjacent light-emitting elements, when the circuit is implemented, the control port outputs a level signal to control each light-emitting element to be independently lightened or a plurality of light-emitting elements to be lightened simultaneously, and the level signal is a high level or a low level corresponding to the serial position of the two adjacent light-emitting elements connected with the control port in a serial body formed by the plurality of light-emitting elements. Illustratively, taking the circuit including two light emitting elements as an example, as shown in fig. 1, the light emitting elements adopt light emitting diodes, namely a first light emitting diode LED1 and a second light emitting diode LED2, wherein an anode of the first light emitting diode LED1 is connected to the power supply terminal VCC, a cathode of the first light emitting diode LED1 is connected to an anode of the second light emitting diode LED2, and a cathode of the second light emitting diode LED2 is grounded. The circuit further comprises a control port MCU _ IO connected to the cathode of the first light emitting diode LED 1.
When the control port MCU _ IO is low, the first light emitting diode LED1 lights up and the second light emitting diode LED2 does not light up.
When the control port MCU _ IO is high, the first light emitting diode LED1 is not lit and the second light emitting diode LED2 is lit.
When the control port MCU _ IO is switched between the high level and the low level fast scan, both the first light emitting diode LED1 and the second light emitting diode LED2 are turned on.
Alternatively, the high level and the low level in the embodiment of the present application may be set according to the type of the light emitting element and the position of the light emitting element, for example, taking the above-mentioned first light emitting diode LED1 and the second light emitting diode LED2 as an example, where the turn-on voltage of the first light emitting diode LED1 and the second light emitting diode LED2 is Vf, when the voltage of the power supply terminal VCC is 2Vf, the high level > Vf, and the low level < Vf. When the control port MCU _ IO is at a low level, for example, the low level is 0.8Vf, at this time, the voltage difference between the two ends of the first light emitting diode LED1 is 1.2Vf, the first light emitting diode LED1 is turned on, and the voltage difference between the two ends of the second light emitting diode LED2 is 0.8Vf, and the second light emitting diode LED2 is not turned on. Similarly, when the control port MCU _ IO is at a high level, for example, the high level is 1.5Vf, at this time, the voltage difference between the two ends of the first light emitting diode LED1 is 0.5Vf, the first light emitting diode LED1 is not lit, and the voltage difference between the two ends of the second light emitting diode LED2 is 1.5Vf, and the second light emitting diode LED2 is lit.
Optionally, the voltage of the power supply terminal VCC may also be less than m × x, or the first light emitting diode LED1 and the second light emitting diode LED2 are further described above, the turn-on voltage of the first light emitting diode LED1 and the turn-on voltage of the second light emitting diode LED2 are Vf, when the voltage of the power supply terminal VCC is less than 2Vf, for example, the voltage of the power supply terminal VCC is 1.8Vf, when the control port MCU _ IO is low level, for example, the low level is zero, at this time, the voltage difference between two ends of the first light emitting diode LED1 is 1.8Vf, the first light emitting diode LED1 is turned on, the voltage difference between two ends of the second light emitting diode LED2 is zero, and the second light emitting diode LED2 is not turned on. When the control port MCU _ IO is at a high level, for example, the high level is 1.4Vf, at this time, the voltage difference between the two ends of the first light emitting diode LED1 is 0.4Vf, the first light emitting diode LED1 is not turned on, and the voltage difference between the two ends of the second light emitting diode LED2 is 1.4Vf, and the second light emitting diode LED2 is turned on. When the control port MCU _ IO is fast-scanned at the high level and the low level, both the first light emitting diode LED1 and the second light emitting diode LED2 are turned on. When the control port MCU _ IO is in a high impedance state (open circuit), the voltage of the power supply terminal VCC is lower than 2Vf, and at this time, neither the first light emitting diode LED1 nor the second light emitting diode LED2 is bright.
The embodiment of the application comprises a plurality of light-emitting elements and at least one control port, wherein the plurality of light-emitting elements are connected in series, the at least one control port is respectively connected with a connecting line between two adjacent light-emitting elements in a one-to-one correspondence mode, so that the light-emitting elements are controlled to be lightened or the plurality of light-emitting elements are controlled to be lightened simultaneously, the number of the control ports is less than that of the light-emitting elements, and therefore resources of the control ports are saved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A lamp control circuit, comprising:
a plurality of light emitting elements connected in series;
and at least one control port connected to a connection line between two adjacent light emitting elements for controlling each light emitting element to be lit individually or a plurality of light emitting elements to be lit simultaneously.
2. The lamp control circuit of claim 1, wherein said at least one control port outputs a level signal to control each light emitting element to be lit individually or a plurality of light emitting elements to be lit simultaneously, said level signal being a high level or a low level corresponding to a connection position of said control port in a serial body of said plurality of light emitting elements.
3. The lamp control circuit of claim 1, wherein the circuit further comprises a current limiting resistor in series with the plurality of light emitting elements in a one-to-one correspondence.
4. The luminaire control circuit of claim 1, wherein the circuit comprises a control chip comprising the at least one control port.
5. An electrical apparatus, characterized in that it comprises a luminaire control circuit as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122704254.XU CN216752180U (en) | 2021-11-05 | 2021-11-05 | Lamp control circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122704254.XU CN216752180U (en) | 2021-11-05 | 2021-11-05 | Lamp control circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216752180U true CN216752180U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122704254.XU Active CN216752180U (en) | 2021-11-05 | 2021-11-05 | Lamp control circuit and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216752180U (en) |
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2021
- 2021-11-05 CN CN202122704254.XU patent/CN216752180U/en active Active
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