Feedback lamp interlocking circuit of intelligent switch panel background lamp

Abstract

The utility model relates to the field of switch lamps, in particular to a feedback lamp interlocking circuit of an intelligent switch panel background lamp, which comprises a switch lamp module, when a switch is pressed down, a high level is conducted, and the switch lamp is turned on; when the switch is not pressed down, the high level of the background lamp module is switched on, and a background lamp is turned on; and the interlocking module is used for lowering the level of the background lamp module when the high level of the switch lamp module is conducted, and lowering the level of the switch lamp module when the high level of the background lamp module is conducted. According to the invention, the switching of the feedback lamp of the switch is smoother.

Description

Technical Field

[0001] This application relates to the field of switching lights, and more particularly to a feedback lamp interlock circuit for a backlight of an intelligent switch panel. Background Technology

[0002] In hotels, first-time guests often don't know which switch corresponds to which light. Therefore, switches with status feedback lights are frequently seen. These lights typically consist of a backlight and an on / off light. The switch has cutouts of lettering, which the feedback light illuminates. For example, a switch with the word "Corridor Light" indicates that it controls the corridor light. When the switch is not pressed, the lettering emits a dim yellow light through the backlight, indicating that the switch is not activated. When the switch is pressed, the lettering emits a bright white light through the on / off light, indicating that the switch is activated. Users can determine whether the corresponding light is lit by observing the color of the lettering, and can directly identify which light a switch corresponds to, reducing the probability of pressing the wrong switch and improving the user experience. This is a common practice, especially in hotels.

[0003] However, when the background light switches between different colors, it often flickers or miscolors. For example, the yellow light goes out, but the white light does not turn on in time. This delay causes the background light to flicker. If the yellow light does not turn off in time, the white light will turn on, which will cause other colors of light to be produced. Utility Model Content

[0004] To improve the problem of flickering or incorrect color emission when the switch panel is pressed, this application provides a feedback lamp interlock circuit for the backlight of an intelligent switch panel.

[0005] This application provides a feedback lamp interlock circuit for a smart switch panel backlight, which adopts the following technical solution:

[0006] A feedback interlock circuit for a smart switch panel backlight includes:

[0007] The light switch module activates when the switch is pressed, turning on the light with a high-level signal.

[0008] When the switch is not pressed, the backlight module is powered on by a high level, thus illuminating the backlight.

[0009] The interlock module pulls down the level of the backlight module when the light switch module is high-level and pulls down the level of the light switch module when the backlight module is high-level.

[0010] By adopting the above technical solution, the interlocking module is used to achieve interlocking between the switch module and the backlight module, reducing the probability that the switch module and the backlight module will not switch in time due to delay or other reasons, making the switching smoother and improving the user experience.

[0011] Optionally, the light switch module includes a light-emitting diode D1, a transistor Q1, and a resistor R56. The positive terminal of the light-emitting diode D1 is electrically connected to a +12V power supply, the negative terminal of the light-emitting diode D1 is electrically connected to the collector of the transistor Q1, the base of the transistor Q1 receives the LED1 signal, and the base and emitter of the transistor Q1 are connected to ground in parallel through the resistor R56.

[0012] By adopting the above technical solution, the on / off state of the light-emitting diode D1 is controlled by the LED1 signal.

[0013] Optionally, the light switch module further includes LED D2 and LED D3, with LED D2 connected in series with LED D1 and LED D3 connected in parallel with LED D1.

[0014] By adopting the above technical solution, the number of light sources has been increased, the brightness has been improved, and the distribution range of the light sources has been expanded.

[0015] Optionally, the backlight module includes a lighting submodule and a control submodule. The lighting submodule includes a light-emitting diode (LED) D38, and the control submodule includes a MOSFET Q7. The positive terminal of the LED D38 is electrically connected to a +12V power supply, and the negative terminal of the LED D38 is electrically connected to the drain of the MOSFET Q7. The negative terminal of the LED D38 serves as the output terminal of the lighting submodule. The source of the MOSFET Q7 is grounded, and the gate of the MOSFET Q7 receives the BACK_LED signal.

[0016] By adopting the above technical solution, the on / off state of the light-emitting diode D38 can be controlled.

[0017] Optionally, the interlock module includes an OUT signal electrically connected to the collector of transistor Q1, and the OUT1 signal is electrically connected to the power supply input terminal of the lighting submodule.

[0018] By adopting the above technical solution, the LEDs of the switching module and the corresponding LEDs of the lighting sub-module are interlocked through the OUT signal, preventing them from being in a high-level state at the same time. This greatly improves the linkage between the LEDs of the switching module and the LEDs of the corresponding lighting sub-module, enabling them to switch quickly.

[0019] Optionally, the interlock module further includes a diode D47, the positive terminal of which is electrically connected between the light-emitting diode D38 and the +12V power supply, and the negative terminal of which is electrically connected to the OUT signal.

[0020] By adopting the above technical solution, the direction of current and voltage is limited, reducing the probability of reverse current and improving stability.

[0021] Optionally, there may be multiple light-switching modules and multiple light-lighting sub-modules.

[0022] By adopting the above technical solution, more feedback lights can be controlled.

[0023] Optionally, the output terminals of multiple lighting submodules are all connected in parallel to the drain of MOSFET Q7.

[0024] By adopting the above technical solution, the on / off control of multiple lighting sub-modules can be achieved through a single MOSFET Q7, reducing the number of components and lowering costs.

[0025] Optionally, there are multiple interlocking modules, each including multiple different OUT signals. The multiple light-switching modules are electrically connected to different OUT signals, and the different OUT signals are electrically connected to the power supply input terminals of different light-lighting sub-modules.

[0026] By adopting the above technical solution, multiple interlocking modules are used to achieve corresponding interlocking between the light switching module and the corresponding light-on sub-module.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Reduce the probability of the switching module and the backlight module failing to switch in time due to delays or other reasons, making the switching smoother and improving the user experience.

[0029] 2. It greatly improves the linkage between the LEDs of the switching module and the corresponding LEDs of the lighting sub-module, enabling them to switch quickly. Attached Figure Description

[0030] Figure 1 This is a circuit diagram of the light switch module.

[0031] Figure 2 This is a circuit diagram of the backlight module.

[0032] Explanation of reference numerals in the attached diagram: 1. Switch module; 2. Backlight module; 21. Lighting sub-module; 22. Control sub-module; 3. Interlock module. Detailed Implementation

[0033] The following is combined with Figure 1-2 This application is described in further detail.

[0034] This application discloses a feedback lamp interlock circuit for a smart switch panel backlight. (Refer to...) Figure 1 and Figure 2 The feedback interlock circuit of the backlight of the smart switch panel includes a switch module 1, a backlight module 2, and an interlock module 3. When the switch is not pressed, the backlight module 2 is high-level and conducts, turning on the backlight, and the interlock module 3 pulls down the level of the switch module 1. When the switch is pressed, the switch module 1 is high-level and conducts, turning on the switch light, and the interlock module 3 pulls down the level of the backlight module 2.

[0035] Reference Figure 1 and Figure 2 The light switch module 1 includes resistors R1, R3, R15, R56, transistor Q1, and LEDs D1, D2, D3, and D4. Resistor R1 is connected in series between the +12V power supply and the positive terminal of LED D1. The negative terminal of LED D1 is electrically connected to the positive terminal of LED D2, and the negative terminal of LED D2 is electrically connected to the collector of transistor Q1. One end of resistor R3 is connected in parallel between resistor R1 and the +12V power supply, and the other end of resistor R3 is electrically connected to the collector of LED Q4. The positive terminal of diode D3 and the negative terminal of LED D3 are electrically connected to the positive terminal of LED D4. The negative terminal of LED D4 is connected in parallel to the collector of transistor Q1. One end of resistor R15 is electrically connected to the base of transistor Q1, and the other end of resistor R15 receives the LED1 signal. The LED1 signal indicates whether the switch is pressed. When the switch is pressed, the LED1 signal is high; when the switch is not pressed, the LED1 signal is low. The level of the LED1 signal can be determined by a microswitch or by an electrical signal directly output by the CPU or MCU. One end of resistor R56 is connected in parallel between resistor R15 and the base of transistor Q1, and the other end of resistor R56 is connected in parallel to the emitter of transistor Q1. The emitter of transistor Q1 is grounded. Interlock module 3 includes OUT signals, including OUT1, OUT2, OUT3, OUT4, OUT5, and OUT6. The collector of transistor Q1 is connected in parallel as the receiver or transmitter of the OUT1 signal. There are multiple light switch modules 1. All light switch modules 1 have the same circuitry and use the same components. The only distinction is that the OUT signal is divided into 1-6. Similarly, the LED1 signal of different light switch modules 1 is divided into LED2, LED3, LED4, LED5, and LED6 signals. Transistor Q1 can be an SS8050 model.

[0036] Reference Figure 1and Figure 2 The background light module 2 includes a control submodule 22 and multiple lighting submodules 21. The lighting submodules 21 include LEDs D38, DA1, and D44, and resistor R49. The control submodule 22 includes a MOSFET Q7 and resistor R48. The interlock module 3 also includes diodes D47, D48, D49, D35, D36, and D37. Resistor R49 is connected in series between the +12V power supply and the positive terminal of LED D38. The negative terminal of LED D38 is electrically connected to the positive terminal of LED DA1, and the negative terminal of LED DA1 is electrically connected to the positive terminal of LED D38. The positive terminal of LED D44 is connected to the negative terminal of MOSFET Q7. The negative terminal of LED D44 serves as the output terminal of the lighting sub-module 21. The source of MOSFET Q7 is grounded. One end of resistor R48 is connected to the gate of MOSFET Q7, and the other end of resistor R48 receives the BACK_LED signal. The BACK_LED signal indicates whether the switch is not pressed. When the switch is not pressed, the BACK_LED signal is high; when the switch is pressed, the BACK_LED signal is low. The level of the BACK_LED signal can be determined by a microswitch or by direct output from the CPU / MCU. The positive terminal of diode D47 is connected in parallel with the positive terminal of LED D38. The negative terminal of diode D47 serves as the receiver or transmitter of the OUT1 signal, enabling interaction with the OUT signal of the switching module 1. MOSFET Q7 can be a 2N7002 model. There are multiple lighting sub-modules 21, and the circuits of the multiple lighting sub-modules 21 are the same, the components used are the same, and the output terminals of all lighting sub-modules 21 are connected in parallel to the drain of MOSFET Q7. Each of the six lighting sub-modules 21 has a different OUT signal connected in parallel to its power supply input terminal.

[0037] The implementation principle of the feedback lamp interlock circuit of the backlight of the intelligent switch panel in this application embodiment is as follows: When the switch corresponding to the LED1 signal is pressed and illuminates, the LED1 signal is at a high level, the base of the transistor Q1 is at a high level, the collector and emitter are connected, and the light-emitting diodes D1, D2, D3, and D4 are forward-conducting and illuminating. The forward conduction of the diodes makes the OUT1 signal at the negative terminal of the diode at a low level. The OUT1 signal is pulled low through the diode D47, causing the light-emitting diodes D38, DA1, and D44 to turn off.

[0038] When the switch corresponding to LED1 signal is pressed and does not light up, LED1 signal is at a low level, the base of transistor Q1 is at a low level, the collector and emitter are open, and LEDs D1, D2, D3, and D4 cannot conduct in the forward direction. At this time, OUT1 signal and the positive terminal of the diodes are both at a high level and cannot conduct. The high level of OUT1 signal makes diode D47 not conduct, which makes LEDs D38, DA1, and D44 corresponding to the switch of LED1 signal conduct, causing LEDs D38, DA1, and D44 to light up.

[0039] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A feedback lamp interlock circuit for a smart switch panel backlight, characterized in that, include: The light switch module (1) turns on the light switch when the switch is pressed, and the light switch is lit. Background light module (2): When the switch is not pressed, the high level is turned on, and the background light is lit. The interlock module (3) pulls down the level of the background light module (2) when the switch light module (1) is high level and pulls down the level of the switch light module (1) when the background light module (2) is high level.

2. The feedback lamp interlock circuit for a smart switch panel backlight according to claim 1, characterized in that: The light switch module (1) includes a light-emitting diode D1, a transistor Q1 and a resistor R56. The positive terminal of the light-emitting diode D1 is electrically connected to the +12V power supply, and the negative terminal of the light-emitting diode D1 is electrically connected to the collector of the transistor Q1. The base of the transistor Q1 receives the LED1 signal, and the base and emitter of the transistor Q1 are connected to ground in parallel through the resistor R56.

3. The feedback lamp interlock circuit for a smart switch panel backlight according to claim 2, characterized in that: The light switch module (1) also includes LED D2 and LED D3, with LED D2 connected in series with LED D1 and LED D3 connected in parallel with LED D1.

4. The feedback lamp interlock circuit for a smart switch panel backlight according to claim 2, characterized in that: The background light module (2) includes a lighting submodule (21) and a control submodule (22). The lighting submodule (21) includes a light-emitting diode (LED) D38, and the control submodule (22) includes a MOSFET Q7. The positive terminal of the LED D38 is electrically connected to a +12V power supply, and the negative terminal of the LED D38 is electrically connected to the drain of the MOSFET Q7. The negative terminal of the LED D38 serves as the output terminal of the lighting submodule (21). The source of the MOSFET Q7 is grounded, and the gate of the MOSFET Q7 receives the BACK_LED signal.

5. The feedback lamp interlock circuit for a smart switch panel backlight according to claim 4, characterized in that: The interlock module (3) includes an OUT signal electrically connected to the collector of transistor Q1, and the OUT1 signal is electrically connected to the power supply input terminal of the lighting submodule (21).

6. The feedback lamp interlock circuit for a smart switch panel backlight according to claim 5, characterized in that: The interlock module (3) also includes a diode D47, the positive terminal of which is electrically connected between the light-emitting diode D38 and the +12V power supply, and the negative terminal of which is electrically connected to the OUT signal.

7. The feedback lamp interlock circuit for a smart switch panel backlight according to claim 5, characterized in that: There are multiple switching light modules (1) and multiple lighting sub-modules (21).

8. The feedback lamp interlock circuit for a smart switch panel backlight according to claim 7, characterized in that: The output terminals of multiple lighting sub-modules (21) are all connected in parallel to the drain of MOS transistor Q7.

9. The feedback lamp interlock circuit for a smart switch panel backlight according to claim 7, characterized in that: The number of interlock modules (3) is multiple, and the multiple interlock modules (3) include multiple different OUT signals. The multiple switch light modules (1) are electrically connected to different OUT signals, and the different OUT signals are electrically connected to the power supply input terminals of different light-up sub-modules (21).

Images