Switch Control Circuit Stabilizes Backlight Driver Voltage
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Solution Overview
Problem
The existing switch control circuits in display technology suffer from logic disorders due to unstable voltage values of control signals, which are affected by interference from other circuits and ripple in the circuit.
Innovation Solution
The proposed solution involves a switch control circuit that includes a voltage dividing circuit, a first transistor, and a second transistor. The voltage dividing circuit receives a control signal and adjusts its voltage specification to ensure stable operation, preventing logic disorders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a control signal is used to control the switch control circuit, then the backlight module lamps can be turned on and off, but the voltage value of the control signal fluctuates due to interference and ripple, causing logic disorder
Solution Approach 1:
A voltage dividing circuit is introduced as an intermediary component between the control signal input and the switch control circuit. This voltage dividing circuit stabilizes the fluctuating control signal voltage by dividing it with resistors, ensuring that the voltage remains within the safe operating range (less than 0.7V when turned off) and prevents logic disorder in the switch control circuit.
2Adaptability or versatility
If the control signal voltage is allowed to fluctuate between 0-1V, then the switch control circuit can respond to control signals, but this causes logic disorder when the voltage exceeds the threshold
Solution Approach 1:
The voltage dividing circuit changes the voltage parameter of the control signal by dividing it with resistors. This ensures that even when the input control signal voltage fluctuates between 0-1V, the voltage reaching the switch control circuit is stabilized to be less than 0.7V, maintaining reliable logic operation while still responding to control signals.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively stabilizes the voltage specification of the control signal, preventing logic disorders and ensuring proper operation of the switch control circuit, even when faced with fluctuations in the control signal.
Implementation Method 1
a voltage dividing circuit, the voltage dividing circuit comprising an input end and an output end, and the input end receiving a control signal
Data Source
AI summary
The present application discloses a switch control circuit and a backlight driver board. The switch control circuit includes a voltage dividing circuit, a first transistor, and a second transistor. The voltage dividing circuit includes an input end and an output end, and the input end receives a control signal. A control electrode of the first transistor is connected with the output end, and an input electrode of the first transistor receives a power supply voltage. A control electrode of the second transistor is connected with an output electrode of the first transistor, an input electrode of the second transistor receives an input voltage, and an output electrode of the second transistor is connected with a voltage output end.