Driving circuit of LEC cold light sheet

Abstract

The invention is suitable for the technical field of electro-luminescent sheets, and provides a driving circuit of an LEC electro-luminescent sheet, which comprises an electric leakage prompt circuit, a power failure alarm circuit and an inverter circuit, the electric leakage prompt circuit is used for giving a prompt when the LEC electro-luminescent sheet leaks electricity; the electric leakage prompt circuit comprises a current signal acquisition module, a current comparison module, a trigger signal module and a cut-off circuit module; the current signal acquisition module is used for acquiring a current signal in a circuit, the current comparison module is used for comparing the acquired current signal with a set threshold value, the trigger signal module is used for outputting a trigger signal, and the cut-off circuit module is used for cutting off the circuit; the power-off alarm circuit is electrically connected to the electric leakage prompting circuit and is used for carrying out power-off alarm when the LEC electro-luminescent sheet is in electric leakage and power-off; according to the invention, unstable and unsafe conditions such as electric leakage, power failure and the like of the LEC cold light sheet can be accurately found, and the problem that the use quality is reduced can be avoided, so that the LEC cold light sheet can stabilize various application environments.

Description

Technical Field

[0001] The present invention relates to the technical field of cold light chips, and in particular to a driving circuit of a LEC cold light chip. Background Art

[0002] Cold light is a device that converts electrical energy. The general working voltage and frequency of cold light sources can be adjusted from AC40V to AC220V, and the operating frequency can be adjusted from 50 Hz to 4000 Hz. Increasing the voltage will increase the brightness of the cold light. Increasing the frequency will also increase the brightness, and the color of the cold light source will appear bluer.

[0003] EL cold light film is the best backlight material for transparent advertising materials printed with trademarks, instructions, election propaganda, car body decoration and interior design, photo backlight or text, but EL cold light film is the first generation product; LEC cold light film is a subsequent updated product. The packaging structure of LEC cold light film usually includes two layers of upper and lower films, as well as a back electrode layer, dielectric layer, luminescent layer, phosphor layer, etc. located between the films. Different hierarchical structures are added according to different functions or effects.

[0004] However, due to the diverse application environments of LEC cold light films, LEC cold light films may have some unstable and unsafe situations such as leakage, which are not easy to be discovered, and will lead to a decline in the quality of use. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide a driving circuit for an LEC cold light film, aiming to solve the problem that due to the diverse application environments of the LEC cold light film, the LEC cold light film may have some unstable and unsafe situations such as leakage, which are not easy to be discovered, thereby causing the problem of reduced quality of use.

[0006] Specifically: A driving circuit of an LEC cold light film, including a leakage prompt circuit, a power failure alarm circuit and an inverter circuit; The leakage warning circuit is used to give a warning when the LEC cold light film leaks; the leakage warning circuit includes a current signal acquisition module, a current comparison module, a trigger signal module and a cut-off circuit module; the current signal acquisition module is used to acquire the current signal in the circuit, the current comparison module is used to compare the acquired current signal with the set threshold, the trigger signal module is used to output the trigger signal, and the cut-off circuit module is used to cut off the circuit; The power-off alarm circuit is electrically connected to the leakage prompt circuit and is used for providing a power-off alarm when the LEC cold light film leaks and fails to provide power.

[0007] Therefore, after leakage occurs in the LEC cold light film, the current signal in the LEC cold light film circuit is collected through the current signal acquisition module, and the current signal acquisition module inputs the collected current signal into the threshold setting unit, and compares it with the threshold value set on the threshold setting unit. After the threshold setting unit determines that the current signal collected by the current signal acquisition module exceeds the threshold value set on the threshold setting unit, a trigger signal is output; after the trigger signal module outputs a current signal exceeding the threshold value set on the threshold setting unit, the circuit cutting module cuts off the circuit, and after the circuit is cut off, the power-off alarm circuit is electrically started, and a power-off alarm is issued when the LEC cold light film leaks and powers off, so as to accurately detect some unstable and unsafe situations such as leakage and power off of the LEC cold light film, avoid problems that may cause a decline in the quality of use, so that the LEC cold light film can be stabilized in various application environments.

[0008] The technical solution of this application is further described below: In one embodiment, the current signal acquisition module is electrically connected to the LEC cold light film circuit, and acquires the current signal in the LEC cold light film circuit.

[0009] In a further embodiment, the current comparison module is electrically connected to the current signal acquisition module, the current comparison module includes a threshold setting unit, the current signal acquisition module inputs the collected current signal into the threshold setting unit, and compares it with the threshold set on the threshold setting unit.

[0010] In an optimized embodiment, the trigger signal module is electrically connected to the threshold setting unit, and outputs a trigger signal after the threshold setting unit determines that the current signal collected by the current signal acquisition module exceeds the threshold set on the threshold setting unit.

[0011] The circuit cut-off module is electrically connected to the trigger signal module. After the trigger signal module outputs a current signal exceeding the threshold value set on the threshold value setting unit, the circuit cut-off module cuts off the circuit.

[0012] Therefore, since the current signal acquisition module is electrically connected to the LEC cold light film circuit, the current comparison module is electrically connected to the current signal acquisition module, the trigger signal module is electrically connected to the threshold setting unit, and the trigger signal module is electrically connected to the threshold setting unit, the stability of signal transmission is guaranteed; after the LEC cold light film has leakage, the current signal in the LEC cold light film circuit is acquired by the current signal acquisition module, the current signal acquisition module inputs the acquired current signal to the threshold setting unit, and compares it with the threshold set on the threshold setting unit, after the threshold setting unit determines that the current signal acquired by the current signal acquisition module exceeds the threshold set on the threshold setting unit, the trigger signal is output; after the trigger signal module outputs a current signal exceeding the threshold set on the threshold setting unit, the circuit cut-off module cuts off the circuit, after the circuit is cut off, the power-off alarm circuit is electrically started, and the power-off alarm is performed when the LEC cold light film leaks and powers off, so as to accurately detect some unstable and unsafe situations such as leakage and power off of the LEC cold light film, avoid the problem of reduced quality of use, so that the LEC cold light film can be stabilized in various application environments.

[0013] In one embodiment, the power failure alarm circuit includes a low voltage and low current controlled switch device, and the low voltage and low current controlled switch device includes pin 1, pin 2, pin 3, pin 4 and pin 5 for electrical connection; The power failure alarm circuit also includes a diode 1, a diode 2, a diode 3, a diode 4, a diode 5, a diode 6, a resistor 1, a resistor 2, a resistor 3, a resistor 4, a resistor 5, a resistor 6, a capacitor 1, and a capacitor 2.

[0014] In a further embodiment, the resistor 3 is connected between pins 1 and 5 of a low voltage and low current controlled switch device; Resistor 4 and resistor 6 are connected between pins 4 and 5 of the low-voltage and low-current controlled switching device.

[0015] In a further embodiment, the diode five and the resistor six are connected to the four pins of the low voltage and low current controlled switch device.

[0016] In a further embodiment, the diode 6 is connected between pins 2 and 4 of the low voltage and low current controlled switching device; the capacitor 2 is connected to pin 2 of the low voltage and low current controlled switching device.

[0017] In a further embodiment, the low voltage and low current controlled switch device is connected to a speaker at its 3rd pin.

[0018] Therefore, there is no voltage input at both ends of a and b, and pin 4 of the switching device controlled by low voltage and small current is at a low level. After pin 5 is divided by resistor 2 and resistor 3, a voltage higher than 1.6V is obtained to trigger the integrated circuit to turn on, and the internal electronic switch is closed. Pin 2 outputs a high level to charge capacitor 2 through resistor 5; capacitor 2 is charged to the power supply voltage in a very short time, making pin 4 a high level, and the switching device controlled by low voltage and small current is cut off. At this time, capacitor 2 is discharged through diode 6 and resistor 6. When capacitor 2 is discharged to make pin 4 a low level, the switching device controlled by low voltage and small current is turned on again, and capacitor 2 is charged and discharged again; in this way, charging and discharging are continuously carried out, the circuit is continuously oscillating, and the speaker continuously emits an audio alarm sound to indicate power failure.

[0019] Compared with the prior art, the driving circuit of the LEC cold light sheet of the present invention can achieve the following: after the LEC cold light sheet has leakage, the current signal in the LEC cold light sheet circuit is collected by the current signal collection module, the current signal collection module inputs the collected current signal into the threshold setting unit, and compares it with the threshold value set on the threshold setting unit, and outputs a trigger signal after the threshold setting unit determines that the current signal collected by the current signal collection module exceeds the threshold value set on the threshold setting unit; after the trigger signal module outputs a current signal exceeding the threshold value set on the threshold setting unit, the circuit cutting module cuts off the circuit, and after the circuit is cut off, the power-off alarm circuit is electrically started, and a power-off alarm is issued when the LEC cold light sheet leaks and the power is cut off, so as to accurately detect some unstable and unsafe situations such as leakage and power-off of the LEC cold light sheet, avoid the problem of reduced quality of use, so that the LEC cold light sheet can be stabilized in various application environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural block diagram of the driving circuit of the LEC cold light film of the present invention; Figure 2 The present invention is a circuit diagram of a power failure alarm circuit. Implementation

[0021] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The specific implementation of the present invention is described in detail below in conjunction with the specific embodiments.

[0022] It should be noted that: low voltage and low current controlled switching device (TWH8778), diode one (VD1), diode two (VD2), diode three (VD3), diode four (VD4), diode five (VD5), diode six (VD6), resistor one (R1), resistor two (R2), resistor three (R3), resistor four (R4), resistor five (R5), resistor six (R6), capacitor one (C1), capacitor two (C2).

[0023] In an embodiment of the present invention, a driving circuit of an LEC cold light film includes a leakage prompt circuit, a power failure alarm circuit and an inverter circuit; The leakage warning circuit is used to give a warning when the LEC cold light film leaks; the leakage warning circuit includes a current signal acquisition module, a current comparison module, a trigger signal module and a cut-off circuit module; the current signal acquisition module is used to acquire the current signal in the circuit, the current comparison module is used to compare the acquired current signal with the set threshold, the trigger signal module is used to output the trigger signal, and the cut-off circuit module is used to cut off the circuit; The power-off alarm circuit is electrically connected to the leakage prompt circuit and is used for providing a power-off alarm when the LEC cold light film leaks and fails to provide power.

[0024] Therefore, after leakage occurs in the LEC cold light film, the current signal in the LEC cold light film circuit is collected through the current signal acquisition module, and the current signal acquisition module inputs the collected current signal into the threshold setting unit, and compares it with the threshold value set on the threshold setting unit. After the threshold setting unit determines that the current signal collected by the current signal acquisition module exceeds the threshold value set on the threshold setting unit, a trigger signal is output; after the trigger signal module outputs a current signal exceeding the threshold value set on the threshold setting unit, the circuit cutting module cuts off the circuit, and after the circuit is cut off, the power-off alarm circuit is electrically started, and a power-off alarm is issued when the LEC cold light film leaks and powers off, so as to accurately detect some unstable and unsafe situations such as leakage and power off of the LEC cold light film, avoid problems that may cause a decline in the quality of use, so that the LEC cold light film can be stabilized in various application environments.

[0025] In the embodiment of the present invention, the current signal acquisition module is electrically connected to the LEC cold light film circuit, and acquires the current signal in the LEC cold light film circuit.

[0026] The current comparison module is electrically connected to the current signal acquisition module. The current comparison module includes a threshold setting unit. The current signal acquisition module inputs the acquired current signal into the threshold setting unit and compares it with the threshold set on the threshold setting unit.

[0027] The trigger signal module is electrically connected to the threshold setting unit, and outputs a trigger signal after the threshold setting unit determines that the current signal collected by the current signal collection module exceeds the threshold set on the threshold setting unit.

[0028] The circuit cut-off module is electrically connected to the trigger signal module. After the trigger signal module outputs a current signal exceeding the threshold value set on the threshold value setting unit, the circuit cut-off module cuts off the circuit.

[0029] Therefore, since the current signal acquisition module is electrically connected to the LEC cold light film circuit, the current comparison module is electrically connected to the current signal acquisition module, the trigger signal module is electrically connected to the threshold setting unit, and the trigger signal module is electrically connected to the threshold setting unit, the stability of signal transmission is guaranteed; after the LEC cold light film has leakage, the current signal in the LEC cold light film circuit is acquired by the current signal acquisition module, the current signal acquisition module inputs the acquired current signal to the threshold setting unit, and compares it with the threshold set on the threshold setting unit, after the threshold setting unit determines that the current signal acquired by the current signal acquisition module exceeds the threshold set on the threshold setting unit, the trigger signal is output; after the trigger signal module outputs a current signal exceeding the threshold set on the threshold setting unit, the circuit cut-off module cuts off the circuit, after the circuit is cut off, the power-off alarm circuit is electrically started, and the power-off alarm is performed when the LEC cold light film leaks and powers off, so as to accurately detect some unstable and unsafe situations such as leakage and power off of the LEC cold light film, avoid the problem of reduced quality of use, so that the LEC cold light film can be stabilized in various application environments.

[0030] In the embodiment of the present invention, the power-off alarm circuit includes a low-voltage and low-current controlled switch device, and the low-voltage and low-current controlled switch device includes pin 1, pin 2, pin 3, pin 4 and pin 5 for electrical connection; The power failure alarm circuit also includes a diode 1, a diode 2, a diode 3, a diode 4, a diode 5, a diode 6, a resistor 1, a resistor 2, a resistor 3, a resistor 4, a resistor 5, a resistor 6, a capacitor 1, and a capacitor 2.

[0031] The resistor 3 is connected between the 1st and 5th pins of the low voltage and low current controlled switch device; the resistor 4 and the resistor 6 are connected between the 4th and 5th pins of the low voltage and low current controlled switch device. The diode 5 and the resistor 6 are connected to the 4th pin of the low voltage and low current controlled switch device. The diode 6 is connected between the 2nd and 4th pins of the low voltage and low current controlled switch device; the capacitor 2 is connected to the 2nd pin of the low voltage and low current controlled switch device. The low voltage and low current controlled switch device is connected to a speaker at its 3rd pin.

[0032] Therefore, there is no voltage input at both ends of a and b, and pin 4 of the switching device controlled by low voltage and small current is at a low level. After pin 5 is divided by resistor 2 and resistor 3, a voltage higher than 1.6V is obtained to trigger the integrated circuit to turn on, and the internal electronic switch is closed. Pin 2 outputs a high level to charge capacitor 2 through resistor 5; capacitor 2 is charged to the power supply voltage in a very short time, making pin 4 a high level, and the switching device controlled by low voltage and small current is cut off. At this time, capacitor 2 is discharged through diode 6 and resistor 6. When capacitor 2 is discharged to make pin 4 a low level, the switching device controlled by low voltage and small current is turned on again, and capacitor 2 is charged and discharged again; in this way, charging and discharging are continuously carried out, the circuit is continuously oscillating, and the speaker continuously emits an audio alarm sound to indicate power failure.

[0033] In view of the problem that due to the diverse application environments of LEC cold light sheets, LEC cold light sheets may have some unstable and unsafe situations such as leakage, which are not easy to be discovered, and thus may cause the problem of reduced quality of use; the driving circuit of the LEC cold light sheet of the present invention can achieve: after the LEC cold light sheet has leakage, the current signal in the LEC cold light sheet circuit is collected by the current signal acquisition module, the current signal acquisition module inputs the collected current signal to the threshold setting unit, and compares it with the threshold set on the threshold setting unit, after the threshold setting unit determines that the current signal collected by the current signal acquisition module exceeds the threshold set on the threshold setting unit, a trigger signal is output; after the trigger signal module outputs a current signal exceeding the threshold set on the threshold setting unit, the circuit cutting module cuts off the circuit, after the circuit is cut off, the power-off alarm circuit is electrically started, and a power-off alarm is performed when the LEC cold light sheet leaks and cuts off the power, so as to accurately detect some unstable and unsafe situations such as leakage and power-off of the LEC cold light sheet, avoid the problem of reduced quality of use, so that the LEC cold light sheet can be stably used in various application environments. In the description of the present invention, unless otherwise stated, "multiple" means two or more. Specific embodiments of the present invention are shown and described herein, but those of ordinary skill in the art will understand that there are various alternative and / or equivalent implementations. It should be understood that the exemplary embodiments or exemplary embodiments are only examples and do not limit the scope, applicability or configuration in any way. On the contrary, the above overview and detailed description will provide those skilled in the art with a convenient roadmap for implementing at least one exemplary embodiment, and it should be understood that various changes can be made in the functions and arrangements of the elements described in the exemplary embodiments without departing from the scope set forth in the attached claims and their legal equivalents. In general, this application is intended to cover any modifications or variations of the specific embodiments discussed herein.

[0034] In the description of the present invention, although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A driving circuit for an LEC cold light film, characterized in that: Including leakage warning circuit, power failure alarm circuit and inverter circuit; The leakage warning circuit is used to give a warning when the LEC cold light film leaks; the leakage warning circuit includes a current signal acquisition module, a current comparison module, a trigger signal module and a cut-off circuit module; the current signal acquisition module is used to acquire the current signal in the circuit, the current comparison module is used to compare the acquired current signal with the set threshold, the trigger signal module is used to output the trigger signal, and the cut-off circuit module is used to cut off the circuit; The power-off alarm circuit is electrically connected to the leakage prompt circuit and is used for providing a power-off alarm when the LEC cold light film leaks and fails to provide power.

2. The driving circuit of the LEC cold light film according to claim 1, characterized in that: The current signal acquisition module is electrically connected to the LEC cold light film circuit, and acquires the current signal in the LEC cold light film circuit.

3. The driving circuit of the LEC cold light film according to claim 2, characterized in that: The current comparison module is electrically connected to the current signal acquisition module. The current comparison module includes a threshold setting unit. The current signal acquisition module inputs the acquired current signal into the threshold setting unit and compares it with the threshold set on the threshold setting unit.

4. The driving circuit of the LEC cold light film according to claim 3, characterized in that: The trigger signal module is electrically connected to the threshold setting unit, and outputs a trigger signal after the threshold setting unit determines that the current signal collected by the current signal collection module exceeds the threshold set on the threshold setting unit.

5. The driving circuit of the LEC cold light film according to claim 4, characterized in that: The circuit cut-off module is electrically connected to the trigger signal module. After the trigger signal module outputs a current signal exceeding the threshold value set on the threshold value setting unit, the circuit cut-off module cuts off the circuit.

6. A driving circuit for an LEC cold light film according to any one of claims 1 to 5, characterized in that: The power failure alarm circuit includes a low voltage and low current controlled switch device, and the low voltage and low current controlled switch device includes pin 1, pin 2, pin 3, pin 4 and pin 5 for electrical connection; The power failure alarm circuit also includes a diode 1, a diode 2, a diode 3, a diode 4, a diode 5, a diode 6, a resistor 1, a resistor 2, a resistor 3, a resistor 4, a resistor 5, a resistor 6, a capacitor 1, and a capacitor 2.

7. The driving circuit of the LEC cold light film according to claim 6, characterized in that: The resistor 3 is connected between pins 1 and 5 of the low voltage and low current controlled switch device; Resistor 4 and resistor 6 are connected between pins 4 and 5 of the low-voltage and low-current controlled switching device.

8. The driving circuit of the LEC cold light film according to claim 6, characterized in that: The diode five and the resistor six are connected to the four-pin of the low-voltage and low-current controlled switch device.

9. The driving circuit of a LEC cold light film according to claim 6, characterized in that: The diode 6 is connected between the 2nd and 4th pins of the low voltage and low current controlled switch device; the capacitor 2 is connected to the 2nd pin of the low voltage and low current controlled switch device.

10. The driving circuit of a LEC cold light film according to claim 6, characterized in that: The switch device controlled by low voltage and small current is connected with a loudspeaker at its 3rd pin.

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