CN218886805U - Display panel backlight control circuit - Google Patents
Display panel backlight control circuit Download PDFInfo
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- CN218886805U CN218886805U CN202221742197.2U CN202221742197U CN218886805U CN 218886805 U CN218886805 U CN 218886805U CN 202221742197 U CN202221742197 U CN 202221742197U CN 218886805 U CN218886805 U CN 218886805U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model provides a display panel backlight control circuit, which comprises a constant current module, a low power consumption module, a mode selection module and a turn-off control module; the input end of the mode selection module and the input end of the turn-off control module are respectively connected with an upper computer; a first output end of the mode selection module is connected with a mode selection input end of the low-power consumption module, and a second output end of the mode selection module is connected with a mode selection input end of the constant current module; the first output end of the turn-off control module is connected with the turn-off control input end of the low-power consumption module, and the second output end of the turn-off control module is connected with the turn-off control input end of the constant current module; the output end of the constant current module and the output end of the low power consumption module are respectively connected with a backlight light source of the display panel. The utility model provides a display panel control circuit in a poor light can make display panel work in normal display mode, low-power consumption mode or turn-off mode, simple structure, and is with low costs, and can reduce LED light decay, extension display panel's life.
Description
Technical Field
The application relates to the technical field of dimming circuits, in particular to a display panel backlight control circuit.
Background
The display panel is widely applied to various instruments and equipment, and can provide necessary information such as the running condition of the equipment for workers. Along with the continuous improvement of the automation degree of equipment, the processing production process is more and more convenient, and many instruments and equipment do not need long-term artificial monitoring, and correspondingly, the display panel also does not need to be in a working state all the time.
The display panel is always in a working state after the equipment is started, on one hand, unnecessary power consumption can be caused, and on the other hand, the service life of the display screen can be shortened. Traditionally, the control circuit that sets up in order to avoid display panel to be in operating condition all the time includes low frequency PWM dimmer circuit and high frequency PWM dimmer circuit, and nevertheless low frequency PWM dimmer circuit makes people's vision tired easily, and high frequency PWM dimmer circuit's structure is complicated, need control based on the MCU chip, and area occupied is big and with high costs.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the existing backlight regulation and control circuit structure of the display panel is complex and high in cost, the application provides a backlight control circuit of the display panel.
The technical scheme is as follows:
a display panel backlight control circuit comprising: the device comprises a constant current module, a low power consumption module, a mode selection module and a turn-off control module;
the input end of the mode selection module and the input end of the turn-off control module are respectively connected with an upper computer;
the first output end of the mode selection module is connected with the mode selection input end of the low-power consumption module, and the second output end of the mode selection module is connected with the mode selection input end of the constant current module;
a first output end of the turn-off control module is connected with a turn-off control input end of the low-power consumption module, and a second output end of the turn-off control module is connected with a turn-off control input end of the constant current module;
the output end of the constant current module and the output end of the low power consumption module are respectively connected with a backlight light source of the display panel.
In some embodiments, the output terminals of the constant current module include a first output terminal and a second output terminal, and the constant current module includes:
the first resistor, the first triode, the first voltage stabilizer, the second resistor and the first diode;
the mode selection input end of the constant current module is connected with the first end of the first resistor and the anode of the first diode; the negative electrode of the first diode is connected with the first output end of the constant current module; the second end of the first resistor is respectively connected with the turn-off control input end of the constant current module, the negative electrode of the first voltage stabilizer and the grid electrode of the first triode; the reference voltage output end of the first voltage stabilizer is connected with the source electrode of the first triode and the first end of the second resistor; the drain electrode of the first triode is connected with the second output end of the constant current module; the positive electrode of the first voltage stabilizer and the second end of the second resistor are connected with the ground in common.
In some embodiments, the constant current module further comprises a first capacitor and a second capacitor;
the first capacitor is connected between the mode selection input end of the constant current module and the ground;
the second capacitor is connected between the drain of the first triode and the ground.
In some embodiments, the first voltage regulator is a TLV431 voltage regulator.
In some embodiments, the output of the low power module comprises a first output and a second output, the low power module comprising:
the variable resistor, the fourth resistor, the second triode, the second diode and the third diode;
the mode selection input end of the low-power consumption module is respectively connected with the cathode of the second diode, the first end of the variable resistor and the anode of the third diode; the negative electrode of the third diode is connected with the first output end of the low-power consumption module; the second end of the variable resistor is respectively connected with the turn-off control input end of the low-power consumption module, the grid electrode of the second triode and the first end of the fourth resistor; the anode of the second diode, the second end of the fourth resistor and the source of the second triode are grounded; and the drain electrode of the second triode is connected with the second output end of the low-power consumption module.
In some embodiments, the low power module further comprises a third capacitor and a fourth capacitor;
the third capacitor is connected between the mode selection input end of the low-power-consumption module and the ground;
the fourth capacitor is connected between the drain of the second triode and the ground.
In some embodiments, the mode selection module comprises:
the third triode is connected with the fourth resistor;
the input end of the mode selection module is connected with the base electrode of the third triode through a fifth resistor, the emitting electrode of the third triode is grounded, and the collecting electrode of the third triode is respectively connected with the grid electrode of the fourth triode and the base electrode of the fifth triode and is connected with an external power supply through a sixth resistor; the drain electrode of the fourth triode is connected with an external power supply, and the source electrode of the fourth triode is connected with the first output end of the mode selection module; an emitter of the fifth triode is connected with the second output end of the mode selection module and is connected with an external power supply through the seventh resistor; and the emitter of the fifth triode is grounded.
In some embodiments, the turn-off control module comprises an eighth resistor, a sixth transistor, a seventh transistor, and a ninth resistor;
the input end of the turn-off control module is connected with the base electrode of the sixth triode through the eighth resistor, the emitter electrode of the sixth triode is connected with the emitter electrode of the seventh triode and grounded, and the collector electrode of the sixth triode is connected with an external power supply through the ninth resistor; and the collector of the seventh triode is connected with the first output end and the second output end of the turn-off control module.
In some embodiments, the display panel backlight control circuit further comprises a key wake-up module;
the output end of the key awakening module is connected with the upper computer and used for sending a key signal to the upper computer.
In some embodiments, the key wake-up module comprises a key switch and a tenth resistor;
the first end of the key switch is connected with the output end of the key awakening module and is connected with an external power supply through the tenth resistor, and the second end of the switch is grounded.
The beneficial effect that technical scheme that this application provided brought includes at least: the embodiment of the utility model provides a display panel backlight control circuit, including constant current module, low-power module, mode selection module and turn-off control module; the input end of the mode selection module and the input end of the turn-off control module are respectively connected with an upper computer; a first output end of the mode selection module is connected with a mode selection input end of the low-power consumption module, and a second output end of the mode selection module is connected with a mode selection input end of the constant current module; a first output end of the turn-off control module is connected with a turn-off control input end of the low-power consumption module, and a second output end of the turn-off control module is connected with a turn-off control input end of the constant current module; the output end of the constant current module and the output end of the low power consumption module are respectively connected with a backlight light source of the display panel. The embodiment of the utility model provides a display panel control circuit in a poor light can make display panel work in normal display mode, low-power consumption mode or turn-off mode, simple structure, and is with low costs, and can reduce LED light decay, extension display panel's life.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a structure of a backlight control circuit of a display panel according to an exemplary embodiment of the present application;
fig. 2 is a circuit diagram illustrating a constant current module and a low power consumption module in a backlight control circuit of a display panel according to an exemplary embodiment of the present application;
FIG. 3 is a circuit diagram illustrating a mode selection module in a display panel backlight control circuit according to an exemplary embodiment of the present application;
FIG. 4 is a circuit diagram illustrating a shutdown control module in a backlight control circuit of a display panel according to an exemplary embodiment of the present application;
FIG. 5 is a circuit diagram illustrating a shutdown control module in a backlight control circuit of a display panel according to an exemplary embodiment of the present application;
fig. 6 is a schematic control flow diagram illustrating an application of the display panel backlight control circuit according to an exemplary embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.
The application provides a display panel control circuit in a poor light can make display panel work in normal display mode, low-power consumption mode or shutoff mode, and simple structure, it is with low costs, and can reduce LED light decay, extension display panel's life.
The first embodiment,
Fig. 1 shows a schematic structural diagram of a display panel backlight control circuit according to an exemplary embodiment of the present application.
Referring to fig. 1, the embodiment of the present invention provides a display panel backlight control circuit, which includes a constant current module 101, a low power consumption module 102, a mode selection module 103, and a turn-off control module 104.
The input end of the mode selection module 103 and the input end of the turn-off control module 104 are respectively connected with an upper computer.
A first output end of the mode selection module 103 is connected to a mode selection input end of the low power consumption module 102, and a second output end of the mode selection module 103 is connected to a mode selection input end of the constant current module 101.
A first output end of the turn-off control module 104 is connected to a turn-off control input end of the low power consumption module 102, and a second output end of the turn-off control module 104 is connected to a turn-off control input end of the constant current module 101.
The output end of the constant current module 101 and the output end of the low power consumption module 102 are respectively connected with a backlight light source of a display panel.
The mode selection module 103 may determine the operating modes of the constant current module 101 and the low power consumption module 102 based on the control of the upper computer, so as to adjust the brightness of the display panel to avoid the phenomenon of power consumption waste.
In a specific example, the upper computer is a central control system of the device where the display panel is located.
Optionally, the control signal sent by the central control system is output to the pin header through the IO output port, and is connected to the display panel backlight control circuit through the pin header.
Optionally, the embodiment of the utility model provides a display panel control circuit in a poor light can be applied to the display module of lathe to make the lathe can close or adjust display panel when unmanned monitoring and be shaded, reduce the consumption.
The embodiment of the utility model provides a display panel control circuit in a poor light can reduce the consumption waste of display panel place equipment in the production and processing process, improves display panel's life. And the control circuit that this embodiment provided simple structure is with low costs, and the suitability is strong, can be applicable to the display panel of different models on multiple equipment.
Example II,
Fig. 2 shows a circuit diagram of the constant current module 101 and the low power consumption module 102 in the backlight control circuit of the display panel provided by the embodiment of the present invention.
Referring to fig. 2, in a specific example, the constant current module 101 is used to supply power to the display panel backlight light source when the display panel is in a normal operation state.
The output terminal of the constant current module 101 includes a first output terminal and a second output terminal.
The constant current module comprises a first resistor R1, a first triode Q1, a first voltage stabilizer TLV431, a second resistor R2, a first diode D1, a first capacitor C1 and a second capacitor C2.
And a mode selection input end IN2 of the constant current module is connected with the first end of the first resistor R1 and the anode of the first diode D1. And the cathode of the first diode D1 is connected with the first output end of the constant current module. The second end of the first resistor R1 is connected to the turn-off control input terminal S2 of the constant current module 101, the negative electrode of the first voltage regulator TLV431, and the gate of the first triode Q1, respectively. A reference voltage output terminal ref of the first voltage regulator TLV431 is connected to the source of the first transistor Q1 and the first end of the second resistor R2. And the drain electrode of the first triode Q1 is connected with the second output end of the constant current module. The positive electrode of the first voltage stabilizer TLV431 and the second end of the second resistor R2 are connected with the ground in common.
The first capacitor C1 is connected between the mode selection input terminal IN2 of the constant current module and the ground, and the second capacitor C2 is connected between the drain of the first triode Q1 and the ground.
The embodiment of the utility model provides an in, first diode D1 is used for preventing that the electric current from flowing backward and causing control signal to crosstalk, can also play the effect of input circuit protection simultaneously.
The first voltage regulator TLV341 is used to provide a stable reference voltage.
The second resistor R2 is a feedback sampling resistor, and the second resistor R2 with proper resistance is selected based on the adaptability of the backlight light source model of the display panel, so that the constant working current required by the backlight light source of the display panel can be obtained, and the display panel is in a stable display state.
Optionally, the first triode Q1 is a field effect transistor.
Referring to fig. 2, the low power consumption module 102 is used to supply power to the backlight source of the display panel when the display panel is in a low power consumption operation state.
In some embodiments, the output of the low power module 102 includes a first output and a second output.
The low power consumption module 102 includes a variable resistor R3, a resistor R4, a second transistor Q2, a second diode D2, a third diode D3, a third capacitor C3, and a fourth capacitor C4.
A mode selection input terminal IN1 of the low power consumption module is respectively connected to a cathode of the second diode D2, a first terminal of the variable resistor R3, and an anode of the third diode D3. And the cathode of the third diode D3 is connected with the first output end of the low-power consumption module. The second end of the variable resistor R3 is respectively connected with the turn-off control input end S1 of the low-power consumption module, the grid electrode of the second triode Q2 and the first end of the fourth resistor R4. The anode of the second diode D2, the second end of the fourth resistor R4, and the source of the second transistor Q2 are grounded. And the drain electrode of the second triode Q2 is connected with the second output end of the low-power consumption module.
The third capacitor C3 is connected between the mode selection input terminal IN1 of the low power module and ground, and the fourth capacitor C4 is connected between the drain of the second triode Q2 and ground.
The embodiment of the utility model provides an in, third diode D3 is used for preventing that the electric current from flowing backward and causing control signal to crosstalk, can also play the effect of input circuit protection simultaneously.
The resistance of the variable resistor R3 needs to be set in cooperation with the resistance of the fourth resistor R4, so that the second triode Q2 works in the amplification region. The current of the second triode Q2 can be controlled by adjusting the resistance value of the variable resistor R3, so that the current control of the backlight light source of the display panel is realized.
Based on the model and actual needs of the backlight light source of the display panel, the resistance value of the variable resistor R3 is adjusted, and the current of the backlight light source of the display panel can be adjusted, so that the display panel can display with required brightness in a low power consumption mode.
Optionally, the second triode Q2 is a field effect transistor.
In fig. 2, the interfaces 1 to 4 are terminal connectors for connecting the display panel backlight light source and supplying power to the display panel backlight.
The embodiment of the utility model provides a display panel control circuit in a poor light can set up and adjust according to the particular case of display panel light source in a poor light, simple structure, and adaptability and commonality are strong, can the various types of display panel of adaptation.
Fig. 3 shows a circuit diagram of the mode selection module 103 in the display panel backlight control circuit provided by the embodiment of the present invention.
Referring to fig. 3, the mode selection module 103 includes a fifth resistor R5, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth resistor R6, a seventh resistor R7, and a fifth capacitor C5.
An input end CTL of the mode selection module is connected with a base electrode of the third triode Q3 through a fifth resistor R5, an emitting electrode of the third triode Q3 is grounded, and a collecting electrode of the third triode Q3 is respectively connected with a grid electrode of the fourth triode Q4 and a base electrode of the fifth triode Q5 and is connected with a power supply end VCC through a sixth resistor R6. And the drain electrode of the fourth triode Q4 is connected with a power supply end VCC, and the source electrode of the fourth triode Q4 is connected with the first output end of the mode selection module. An emitter of the fifth triode Q5 is connected to the second output terminal of the mode selection module, and is connected to a power supply terminal VCC through the seventh resistor R7. The emitter of the fifth triode Q5 is grounded. The fifth capacitor is connected between the emitter of the fifth triode Q5 and the second mode selection output terminal.
The embodiment of the utility model provides an among the display panel control circuit that is shaded, mode selection module 103's input CTL is used for connecting the host computer, receives the control signal that the host computer sent.
When a CTL control signal sent by the upper computer is at a low level, the third triode Q3, the fourth triode Q4 and the fifth triode Q5 are all in a cut-off state, a path where the second mode selection output end is located is conducted, the constant current module is conducted, the backlight control circuit of the display panel operates in a constant current working mode, and the display panel displays normally.
When a CTL control signal sent by the upper computer is at a high level, the third triode Q3, the fourth triode Q4 and the fifth triode Q5 are in a conducting state, at the moment, a channel where the first mode selection output end is located is conducted, the level of the second mode selection output end is pulled down, the low-power-consumption module is conducted, and the display panel backlight control circuit operates in a low-power-consumption working mode.
Because the states of the first mode selection output end and the second mode selection output end are opposite and are in a high state and a low state, the situation of control conflict can not occur.
Fig. 4 shows a circuit diagram of the turn-off control module 104 in the display panel backlight control circuit provided by the embodiment of the present invention.
Referring to fig. 4, the turn-off control module includes an eighth resistor R8, a sixth diode Q6, a seventh diode Q7, and a ninth resistor R9.
The input end BK of the turn-off control module is connected with the base electrode of the sixth triode Q3 through the eighth resistor, the emitting electrode of the sixth triode Q3 is connected with the emitting electrode of the seventh triode Q3 and is grounded, and the collecting electrode of the sixth triode Q3 is connected with the power supply end VCC through the ninth resistor R9. And the collector of the seventh triode Q7 is connected with the first output end and the second output end of the turn-off control module.
When a BK signal sent by the upper computer is in a low level, the sixth triode Q6 is in a cut-off state, the seventh triode Q7 is in a conducting state, the control signals of the S1 and the S2 are pulled down, the field effect transistors in the constant current module and the low power consumption module are in a cut-off state, and the backlight display panel is in a rest state.
When a BK signal sent by the upper computer is at a high level, the sixth triode Q6 is in a conducting state, the base electrode of the seventh triode Q7 is pulled down and is in a cut-off state, and the constant current module and the low power consumption module supply power and control the backlight light source of the display panel.
In some embodiments, the display panel backlight control circuit further comprises a key wake-up module;
the output end of the key awakening module is connected with the upper computer and used for sending key signals to the upper computer.
Fig. 5 shows a circuit diagram of a key wake-up module in a backlight control circuit of a display panel according to an embodiment of the present invention.
Referring to fig. 5, the key wake-up module includes a key switch S, an eighth capacitor C8 and a tenth resistor R10.
The first end of the key switch S is connected to the output WAKE of the key WAKE-up module and is connected to the constant voltage source through a tenth resistor R10, and the second end of the key switch S is grounded. And an eighth capacitor C8 is connected in parallel with two ends of the switch S.
When an operator triggers the switch S, the WAKE-up signal output end WAKE is transmitted to the upper computer and triggered from high level to low level, so that the upper computer is started and wakened up.
Specifically, after receiving the trigger, the upper computer controls the backlight turn-off signal to be at a high level, and controls the mode selection control signal CTL to be at a low level, so that the constant current module of the backlight control circuit of the display panel is turned on, and the display panel operates in a constant current state to perform normal display.
Further, the embodiment of the utility model provides a components and parts such as resistance or field effect transistor in the display panel control circuit that is shaded can select the model according to actual need to adapt to different types of display panel, reach better adaptation effect.
Example III,
Fig. 6 shows a schematic control flow diagram of the display panel backlight control circuit according to the embodiment of the present invention.
Referring to fig. 6, when the display panel is in the normal display mode, it is determined whether the device where the display panel is located has an operation at intervals of a preset time period; if the device is operated, the normal display mode of the display panel is maintained.
And if the non-operation time is greater than the first time threshold and less than or equal to the second time threshold, controlling the display panel to work in a low power consumption mode.
And if the non-operation time is greater than the second time threshold, controlling the display panel to enter a backlight off mode.
And under the low power consumption mode or the backlight off mode, if the awakening condition exists, awakening the display panel to enable the display panel to work in a normal display mode.
Optionally, the wake-up condition is an external operation trigger, or an alarm is required when the device is abnormal.
In a specific example, the above control flow is implemented by a central control system of the device where the display panel is located, and the central control system monitors the display unit in real time to determine the working state of the display panel.
Specifically, the central control system controls the backlight control circuit of the display panel through the level of the CTL so as to adjust the working state of the display panel.
The first time threshold n1 and the second time threshold n2 may be adjusted according to actual needs.
To sum up, the utility model provides a display panel control circuit in a poor light can make display panel work in normal display mode, low-power consumption mode or turn-off mode, simple structure, and is with low costs, and can reduce LED light decay, extension display panel's life.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A display panel backlight control circuit, comprising: the device comprises a constant current module, a low power consumption module, a mode selection module and a turn-off control module;
the input end of the mode selection module and the input end of the turn-off control module are respectively connected with an upper computer;
a first output end of the mode selection module is connected with a mode selection input end of the low-power consumption module, and a second output end of the mode selection module is connected with a mode selection input end of the constant current module;
a first output end of the turn-off control module is connected with a turn-off control input end of the low-power consumption module, and a second output end of the turn-off control module is connected with a turn-off control input end of the constant current module;
the output end of the constant current module and the output end of the low power consumption module are respectively connected with a backlight light source of the display panel.
2. The display panel backlight control circuit according to claim 1, wherein the output terminal of the constant current module comprises a first output terminal and a second output terminal, and the constant current module comprises:
the circuit comprises a first resistor, a first triode, a first voltage stabilizer, a second resistor and a first diode;
the mode selection input end of the constant current module is connected with the first end of the first resistor and the anode of the first diode; the cathode of the first diode is connected with the first output end of the constant current module; the second end of the first resistor is respectively connected with the turn-off control input end of the constant current module, the negative electrode of the first voltage stabilizer and the grid electrode of the first triode; the reference voltage output end of the first voltage stabilizer is connected with the source electrode of the first triode and the first end of the second resistor; the drain electrode of the first triode is connected with the second output end of the constant current module; the positive electrode of the first voltage stabilizer and the second end of the second resistor are connected with the ground in common.
3. The display panel backlight control circuit according to claim 2, wherein the constant current module further comprises a first capacitor and a second capacitor;
the first capacitor is connected between the mode selection input end of the constant current module and the ground;
the second capacitor is connected between the drain of the first triode and the ground.
4. The display panel backlight control circuit of claim 2, wherein the first voltage regulator is a TLV431 voltage regulator.
5. The display panel backlight control circuit of claim 1, wherein the output of the low power module comprises a first output and a second output, the low power module comprising:
the variable resistor, the fourth resistor, the second triode, the second diode and the third diode;
the mode selection input end of the low-power consumption module is respectively connected with the cathode of the second diode, the first end of the variable resistor and the anode of the third diode; the negative electrode of the third diode is connected with the first output end of the low-power consumption module; the second end of the variable resistor is respectively connected with a turn-off control input end of the low-power consumption module, a grid electrode of the second triode and the first end of the fourth resistor; the anode of the second diode, the second end of the fourth resistor and the source of the second triode are grounded; and the drain electrode of the second triode is connected with the second output end of the low-power consumption module.
6. The display panel backlight control circuit of claim 5, wherein the low power module further comprises a third capacitor and a fourth capacitor;
the third capacitor is connected between the mode selection input end of the low-power-consumption module and the ground;
the fourth capacitor is connected between the drain of the second triode and the ground.
7. The display panel backlight control circuit of claim 1, wherein the mode selection module comprises:
the third triode is connected with the fourth resistor;
the input end of the mode selection module is connected with the base electrode of the third triode through a fifth resistor, the emitting electrode of the third triode is grounded, and the collecting electrode of the third triode is respectively connected with the grid electrode of the fourth triode and the base electrode of the fifth triode and is connected with an external power supply through a sixth resistor; the drain electrode of the fourth triode is connected with an external power supply, and the source electrode of the fourth triode is connected with the first output end of the mode selection module; an emitter of the fifth triode is connected with the second output end of the mode selection module and is connected with an external power supply through the seventh resistor; and the emitter of the fifth triode is grounded.
8. The display panel backlight control circuit of claim 1, wherein the turn-off control module comprises an eighth resistor, a sixth transistor, a seventh transistor, and a ninth resistor;
the input end of the turn-off control module is connected with the base electrode of the sixth triode through the eighth resistor, the emitter electrode of the sixth triode is connected with the emitter electrode of the seventh triode and grounded, and the collector electrode of the sixth triode is connected with an external power supply through the ninth resistor; and the collector of the seventh triode is connected with the first output end and the second output end of the turn-off control module.
9. The display panel backlight control circuit of claim 1, wherein the display panel backlight control circuit further comprises a key wake-up module;
the output end of the key awakening module is connected with the upper computer and used for sending a key signal to the upper computer.
10. The display panel backlight control circuit of claim 9, wherein the key wake-up module comprises a key switch and a tenth resistor;
the first end of the key switch is connected with the output end of the key awakening module and is connected with an external power supply through the tenth resistor, and the second end of the key switch is grounded.
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| CN202221742197.2U CN218886805U (en) | 2022-07-05 | 2022-07-05 | Display panel backlight control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115083358A (en) * | 2022-07-05 | 2022-09-20 | 珠海格力电器股份有限公司 | Display panel backlight control circuit and control method |
| CN115083358B (en) * | 2022-07-05 | 2024-06-28 | 珠海格力电器股份有限公司 | Display panel backlight control circuit and control method |
-
2022
- 2022-07-05 CN CN202221742197.2U patent/CN218886805U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115083358A (en) * | 2022-07-05 | 2022-09-20 | 珠海格力电器股份有限公司 | Display panel backlight control circuit and control method |
| CN115083358B (en) * | 2022-07-05 | 2024-06-28 | 珠海格力电器股份有限公司 | Display panel backlight control circuit and control method |
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