Driving circuit for controlling semi-bright display of LED lamp, display screen and household electrical appliance

Abstract

The utility model provides a drive circuit for controlling the display of an LED lamp to be semi-bright, a display screen and a household electrical appliance, and relates to the technical field of LED drive circuits, the drive circuit comprises a signal source control circuit, a nixie tube drive circuit, an LED lamp display semi-bright control circuit and an LED lamp combination circuit, the output end of the signal source control circuit is connected with the input end of the nixie tube drive circuit, and the output end of the nixie tube drive circuit is connected with the input end of the LED lamp display semi-bright control circuit. The output end of the nixie tube driving circuit is connected with the input end of the LED lamp display semi-bright control circuit, and the output end of the LED lamp display semi-bright control circuit is connected with the input end of the LED lamp combination circuit. According to the utility model, the full-bright and half-bright display of the LED brightness is effectively realized, and the working stability of the LED lamp in a half-bright state is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of LED driving circuits, and in particular to a driving circuit for controlling LED lights to display half-brightness, a display screen, and a household appliance. Background Technology

[0002] With its numerous significant advantages, such as low-voltage driving, high energy efficiency, and ultra-long lifespan, LEDs have achieved widespread application penetration in many fields. In recent years, LED display technology has undergone a significant transformation from extensive to intensive, leaping from early large pixel pitch and low resolution to the current level of small-pitch, ultra-high-definition high-end indoor displays. The complexity and precision of the technology continue to rise. At the same time, with increasingly stringent market requirements for energy efficiency, research on LED lamp driving circuits is of great significance.

[0003] The prior art discloses an LED full-color screen driving circuit, which includes a first power supply terminal and a second power supply terminal. The first power supply terminal is sequentially connected to a first LED and its driver chip and then grounded. The second power supply terminal is sequentially connected to a second LED and its driver chip and then grounded. Furthermore, the second power supply terminal is also sequentially connected to a third LED and its driver chip and then grounded. However, this LED driving circuit drives the LED display to be fully bright or fully dark, lacking the ability to work stably in a half-bright state, which limits the application of LEDs. That is, it can achieve full-brightness LED display, but lacks the half-brightness effect. Utility Model Content

[0004] To address the problem in existing technologies where LEDs are fully bright but lack a half-bright effect, this invention proposes a driving circuit, display screen, and household appliance for controlling LED lights to display half-brightness, effectively achieving full-brightness and half-brightness LED displays and ensuring the stability of LED lights operating in half-brightness mode.

[0005] To achieve the above-mentioned technical effects, the technical solution of this utility model is as follows:

[0006] A driving circuit for controlling LED lights to display half brightness includes a signal source control circuit, a digital tube driving circuit, an LED light display half brightness control circuit, and an LED light combination circuit. The output terminal of the signal source control circuit is connected to the input terminal of the digital tube driving circuit, the output terminal of the digital tube driving circuit is connected to the input terminal of the LED light display half brightness control circuit, and the output terminal of the LED light display half brightness control circuit is connected to the input terminal of the LED light combination circuit.

[0007] In this technical solution, the digital tube driver circuit receives the signal from the signal source control circuit and controls the LED lamp display half-brightness control circuit to drive the LED lamp combination circuit. Through the close connection and cooperation between the signal source control circuit, the digital tube driver circuit, the LED lamp display half-brightness control circuit, and the LED lamp combination circuit, the flexible switching between the full-brightness and half-brightness states of the LED lamp is realized, which significantly improves the working stability of the LED lamp in the half-brightness state and effectively fills the gap in controlling the half-brightness display of LEDs.

[0008] Preferably, the signal source control circuit is a microcontroller (MCU), with an external power supply connected to the MCU's power input port VDD, and the MCU's signal output port connected to the input of the digital tube driver circuit. By using a microcontroller (MCU) as the signal source control circuit, not only is the circuit structure simplified and the circuit's integration and reliability improved, but the powerful signal processing capabilities of the MCU also enable more precise control of the digital tube driver circuit, thereby achieving fine adjustment of the LED display's half-bright state and further enhancing the stability and flexibility of the LED display when it is half-bright.

[0009] Preferably, the signal output port of the microcontroller MCU includes a first output pin PB5 and a second output pin PB4. The first output pin PB5 and the second output pin PB4 of the microcontroller MCU are both connected to the input terminal of the digital tube driver circuit. This enhances the redundancy and stability of signal transmission, enabling the microcontroller MCU to simultaneously output multiple control signals, thereby flexibly adjusting the half-brightness display state of the LED and improving the reliability and control accuracy of the entire driver circuit.

[0010] Preferably, the digital tube driving circuit includes a first adjusting resistor R1, a second adjusting resistor R2, and a digital tube driving chip. The first output pin PB5 of the microcontroller (MCU) is connected to one end of the first adjusting resistor R1, and the other end of the first adjusting resistor R1 is connected to the first input pin DIN of the digital tube driving chip. The second output pin PB4 of the MCU is connected to one end of the second adjusting resistor R2, and the other end of the second adjusting resistor R2 is connected to the second input pin CLK of the digital tube driving chip. The first output pin G11 and the second output pin G10 of the digital tube driving chip are both connected to the LED half-brightness control circuit. The power input pin VDD of the digital tube driving chip is connected to a second external power supply. By using the first adjusting resistor R1 and the second adjusting resistor R2, the input signal of the digital tube driving circuit is adjusted. The introduction of the digital tube driving chip enhances the driving capability of the circuit and ensures the stable operation of the LED lamp combination circuit.

[0011] Preferably, the voltage of both the first external power supply and the second external power supply is 5V.

[0012] Preferably, the LED light display half-brightness control circuit is a third adjusting resistor R3. One end of the third adjusting resistor R3 is connected to the input terminal of the LED light combination circuit and the first output pin G11 of the digital tube driver chip, and the other end of the third adjusting resistor R3 is connected to the second output pin G10 of the digital tube driver chip. The limiting effect of the third adjusting resistor R3 on the current reduces the current flowing into the LED light combination circuit, thereby reducing the brightness of the LEDs in the LED light combination circuit and realizing the half-brightness function.

[0013] Preferably, the LED lamp combination circuit includes several LED lamps connected in parallel, the negative terminal of each LED lamp is connected to the other end of the third adjusting resistor R3, and the positive terminal of each LED lamp is connected to the common signal port S3 of the digital tube driver chip.

[0014] Preferably, each LED is a light-emitting diode of the same color.

[0015] This utility model also proposes a display screen, including the control and display half-bright LED lamp driving circuit as described above.

[0016] This utility model also proposes a household appliance, including the aforementioned display screen.

[0017] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0018] This utility model proposes a driving circuit for controlling LED lights to display half brightness, a display screen, and a household appliance. The circuit includes a signal source control circuit, a digital tube driving circuit, an LED light display half brightness control circuit, and an LED light combination circuit. The digital tube driving circuit receives the signal source from the signal source control circuit and controls the LED light display half brightness control circuit to drive the LED light combination circuit. Through the close connection and cooperation between the signal source control circuit, the digital tube driving circuit, the LED light display half brightness control circuit, and the LED light combination circuit, the flexible switching between full brightness and half brightness states of the LED lights is realized, significantly improving the working stability of the LED lights in the half brightness state and effectively filling the gap in controlling LED half brightness displays. Attached Figure Description

[0019] Figure 1 This diagram illustrates the structure of a control circuit for a half-bright LED display, as presented in an embodiment of this utility model.

[0020] Figure 2 This is a block diagram illustrating the working principle of a control LED light display half-bright driving circuit proposed in Embodiment 1 of this utility model;

[0021] Figure 3 This diagram illustrates a display screen structure proposed in an embodiment of the present invention.

[0022] Figure 4 This diagram illustrates the structure of a household appliance as presented in an embodiment of this utility model. Detailed Implementation

[0023] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent.

[0024] To better illustrate this embodiment, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent actual dimensions. The descriptions of directions such as "up" and "down" are not intended to limit this patent.

[0025] It is understandable to those skilled in the art that some well-known details may be omitted from the accompanying drawings;

[0026] The terms used to describe positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0028] Example 1

[0029] like Figure 1 As shown, this embodiment proposes a driving circuit for controlling the half-brightness of LED lights, including a signal source control circuit 1, a digital tube driving circuit 2, an LED light half-brightness control circuit 3, and an LED light combination circuit 4. The output terminal of the signal source control circuit 1 is connected to the input terminal of the digital tube driving circuit 2, the output terminal of the digital tube driving circuit 2 is connected to the input terminal of the LED light half-brightness control circuit 3, and the output terminal of the LED light half-brightness control circuit 3 is connected to the input terminal of the LED light combination circuit 4.

[0030] See Figure 2 The working principle of the LED light control circuit for half-brightness display is as follows:

[0031] The signal source control circuit 1 provides a signal source to the digital tube driver circuit 2; the digital tube driver circuit 2 outputs a drive signal to the LED half-brightness control circuit 3 according to the received signal source; the LED half-brightness control circuit 3 adjusts the drive signal and outputs a half-brightness display signal to drive the LED combination circuit to realize the switching between the full-brightness and half-brightness states of the LEDs.

[0032] Through close collaboration among the various circuit modules, stable operation of the LED lights in the half-bright state is ensured, filling the gap in LED half-bright display control. The circuit includes a signal source control circuit, a digital tube driver circuit, an LED half-bright display control circuit, and an LED combination circuit. The digital tube driver circuit receives the signal from the signal source control circuit and controls the LED half-bright display control circuit to drive the LED combination circuit. Through the close connection and collaboration between the signal source control circuit, the digital tube driver circuit, the LED half-bright display control circuit, and the LED combination circuit, flexible switching between full-bright and half-bright states of the LED lights is achieved, significantly improving the operational stability of the LED lights in the half-bright state and effectively filling the gap in controlling LED half-bright displays.

[0033] The signal source control circuit 1 is a microcontroller (MCU). An external power supply is connected to the power input port VDD of the MCU, and the signal output port of the MCU is connected to the input of the digital tube driver circuit 2. By using a microcontroller (MCU) as the signal source control circuit, the circuit structure is simplified, the integration and reliability of the circuit are improved, and the powerful signal processing capability of the MCU can be used to control the digital tube driver circuit more precisely, thereby achieving fine adjustment of the LED display in the half-bright state, further enhancing the stability and flexibility of the LED display in the half-bright state.

[0034] The signal output ports of the microcontroller MCU include a first output pin PB5 and a second output pin PB4. Both the first output pin PB5 and the second output pin PB4 of the microcontroller MCU are connected to the input terminal of the digital tube driver circuit 2. This enhances the redundancy and stability of signal transmission, enabling the microcontroller MCU to simultaneously output multiple control signals, thereby flexibly adjusting the half-brightness display state of the LEDs and improving the reliability and control accuracy of the entire driver circuit.

[0035] The digital tube driver circuit 2 includes a first adjusting resistor R1, a second adjusting resistor R2, and a digital tube driver chip. The first output pin PB5 of the microcontroller MCU is connected to one end of the first adjusting resistor R1, and the other end of the first adjusting resistor R1 is connected to the first input pin DIN of the digital tube driver chip. The second output pin PB4 of the microcontroller MCU is connected to one end of the second adjusting resistor R2, and the other end of the second adjusting resistor R2 is connected to the second input pin CLK of the digital tube driver chip. The first output pin G11 and the second output pin G10 of the digital tube driver chip are both connected to the LED half-brightness control circuit 3. The power input pin VDD of the digital tube driver chip is connected to a second external power supply. By using the first adjusting resistor R1 and the second adjusting resistor R2, the input signal of the digital tube driver circuit is adjusted. The introduction of the digital tube driver chip enhances the driving capability of the circuit and ensures the stable operation of the LED lamp combination circuit.

[0036] The voltage of both the first external power supply and the second external power supply is 5V.

[0037] The LED light display half-brightness control circuit 3 is a third adjustment resistor R3. One end of the third adjustment resistor R3 is connected to the input terminal of the LED light combination circuit 4 and the first output pin G11 of the digital tube driver chip, and the other end of the third adjustment resistor R3 is connected to the second output pin G10 of the digital tube driver chip. The limiting effect of the third adjustment resistor R3 on the current reduces the current flowing into the LED light combination circuit, thereby reducing the brightness of the LEDs in the LED light combination circuit and realizing the half-brightness function.

[0038] The LED lamp combination circuit 4 includes several LEDs connected in parallel. The negative terminal of each LED is connected to the other end of the third adjusting resistor R3, and the positive terminal of each LED is connected to the common signal port S3 of the digital tube driver chip. Each LED is a light-emitting diode of the same color.

[0039] Here, the process for implementing full-brightness and half-brightness LED display is as follows: The digital tube driver chip receives instructions from the microcontroller (MCU) and adjusts the LED brightness by controlling the opening and closing of pins G10 and G11; specifically, see... Figure 1 The microcontroller (MCU) outputs instructions to the digital tube driver chip via pin PB5 and pin PB4. The digital tube driver chip receives instructions via pin DIN and pin CLK. If the digital tube driver chip outputs an instruction to control port G11 and close port G10, thereby controlling the LED, the LED will have a full-brightness function. If the digital tube driver chip outputs an instruction to control port G10 and close port G11, thereby controlling the LED, the LED will have a half-brightness function after adjusting the current through resistor R8.

[0040] Example 2

[0041] See Figure 3 This embodiment proposes a display screen, including a control circuit for displaying half-bright LEDs as described in the above embodiment. The circuit includes a signal source control circuit 1, a digital tube drive circuit 2, an LED half-brightness control circuit 3, and an LED combination circuit 4. The output terminal of the signal source control circuit 1 is connected to the input terminal of the digital tube drive circuit 2, the output terminal of the digital tube drive circuit 2 is connected to the input terminal of the LED half-brightness control circuit 3, and the output terminal of the LED half-brightness control circuit 3 is connected to the input terminal of the LED combination circuit 4.

[0042] The working principle of the LED light control circuit for half-brightness display is as follows:

[0043] The signal source control circuit 1 provides a signal source to the digital tube driver circuit 2; the digital tube driver circuit 2 outputs a drive signal to the LED half-brightness control circuit 3 according to the received signal source; the LED half-brightness control circuit 3 adjusts the drive signal and outputs a half-brightness display signal to drive the LED combination circuit to realize the switching between the full-brightness and half-brightness states of the LEDs.

[0044] Through close collaboration among the various circuit modules, stable operation of the LED lights in the half-bright state is ensured, filling the gap in LED half-bright display control. The circuit includes a signal source control circuit, a digital tube driver circuit, an LED half-bright display control circuit, and an LED combination circuit. The digital tube driver circuit receives the signal from the signal source control circuit and controls the LED half-bright display control circuit to drive the LED combination circuit. Through the close connection and collaboration between the signal source control circuit, the digital tube driver circuit, the LED half-bright display control circuit, and the LED combination circuit, flexible switching between full-bright and half-bright states of the LED lights is achieved, significantly improving the operational stability of the LED lights in the half-bright state and effectively filling the gap in controlling LED half-bright displays.

[0045] Example 3

[0046] See Figure 4 A household appliance includes a display screen as described in the above embodiment. The display screen includes a control circuit for displaying half-bright LED lights as described above. The circuit includes a signal source control circuit 1, a digital tube drive circuit 2, an LED light display half-brightness control circuit 3, and an LED light combination circuit 4. The output terminal of the signal source control circuit 1 is connected to the input terminal of the digital tube drive circuit 2, the output terminal of the digital tube drive circuit 2 is connected to the input terminal of the LED light display half-brightness control circuit 3, and the output terminal of the LED light display half-brightness control circuit 3 is connected to the input terminal of the LED light combination circuit 4.

[0047] The working principle of the LED light control circuit for half-brightness display is as follows:

[0048] The signal source control circuit 1 provides a signal source to the digital tube driver circuit 2; the digital tube driver circuit 2 outputs a drive signal to the LED half-brightness control circuit 3 according to the received signal source; the LED half-brightness control circuit 3 adjusts the drive signal and outputs a half-brightness display signal to drive the LED combination circuit to realize the switching between the full-brightness and half-brightness states of the LEDs.

[0049] Through close collaboration among various circuit modules, stable operation of the LED lights in the half-bright state is ensured, filling the gap in LED half-bright display control. The circuit includes a signal source control circuit, a digital tube driver circuit, an LED half-bright display control circuit, and an LED combination circuit. The digital tube driver circuit receives the signal from the signal source control circuit and controls the LED half-bright display control circuit to drive the LED combination circuit. Through the close connection and collaboration between the signal source control circuit, the digital tube driver circuit, the LED half-bright display control circuit, and the LED combination circuit, flexible switching between full-bright and half-bright states of the LED lights is achieved, significantly improving the operational stability of the LED lights in the half-bright state. This effectively fills the gap in controlling LED half-bright displays and also enables the display of half-bright and full-bright menus on the IMD panel or transparent window of household appliances.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A driving circuit for controlling an LED light to display half-brightness, characterized in that, It includes a signal source control circuit (1), a digital tube driving circuit (2), an LED light display half-brightness control circuit (3), and an LED light combination circuit (4). The output terminal of the signal source control circuit (1) is connected to the input terminal of the digital tube driving circuit (2), the output terminal of the digital tube driving circuit (2) is connected to the input terminal of the LED light display half-brightness control circuit (3), and the output terminal of the LED light display half-brightness control circuit (3) is connected to the input terminal of the LED light combination circuit (4).

2. The LED light display half-brightness driving circuit according to claim 1, characterized in that, The signal source control circuit (1) is a microcontroller MCU. The external power supply is connected to the power input port VDD of the microcontroller MCU, and the signal output port of the microcontroller MCU is connected to the input terminal of the digital tube driving circuit (2).

3. The LED light control circuit for half-brightness display according to claim 2, characterized in that, The signal output port of the microcontroller MCU includes a first output pin PB5 and a second output pin PB4. The first output pin PB5 and the second output pin PB4 of the microcontroller MCU are connected to the input terminal of the digital tube driving circuit (2).

4. The LED light control circuit for half-brightness display according to claim 3, characterized in that, The digital tube driving circuit (2) includes a first regulating resistor R1, a second regulating resistor R2 and a digital tube driving chip. The first output pin PB5 of the microcontroller MCU is connected to one end of the first regulating resistor R1, and the other end of the first regulating resistor R1 is connected to the first input pin DIN of the digital tube driving chip. The second output pin PB4 of the microcontroller MCU is connected to one end of the second regulating resistor R2, and the other end of the second regulating resistor R2 is connected to the second input pin CLK of the digital tube driving chip. The first output pin G11 and the second output pin G10 of the digital tube driving chip are both connected to the LED half-bright control circuit (3). The power input pin VDD of the digital tube driving chip is connected to the second external power supply.

5. The LED light control circuit for half-brightness display according to claim 4, characterized in that, The voltage of the second external power supply is 5V.

6. The LED light control circuit for half-brightness display according to claim 4, characterized in that, The LED lamp half-brightness control circuit (3) is a third adjustment resistor R3. One end of the third adjustment resistor R3 is connected to the input terminal of the LED lamp combination circuit (4) and the first output pin G11 of the digital tube driver chip, and the other end of the third adjustment resistor R3 is connected to the second output pin G10 of the digital tube driver chip.

7. The LED light display half-brightness driving circuit according to claim 6, characterized in that, The LED lamp combination circuit (4) includes several LED lamps connected in parallel. The negative terminal of each LED lamp is connected to the other end of the third adjustment resistor R3, and the positive terminal of each LED lamp is connected to the common signal port S3 of the digital tube driver chip.

8. The LED light display half-brightness driving circuit according to claim 7, characterized in that, Each LED is a light-emitting diode of the same color.

9. A display screen, characterized in that, Includes the LED light control circuit for half-brightness display as described in any one of claims 1-8.

10. A household appliance, characterized in that, Includes the display screen as described in claim 9.

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