Level Shifter Circuit With Voltage Cutoff for Display Short Protection
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Solution Overview
Problem
Conventional display panels face issues with short circuits due to densely arranged signal lines, leading to heat generation and potential damage, particularly the melting of polarizing plates.
Innovation Solution
A level shifter circuit comprising a level shifter module and a compare module, which compares the voltage of the level shifter result signal with a reference voltage, controlling the operation of the level shifter unit to prevent short circuits by stopping or continuing signal generation based on the comparison result, utilizing a delay controller and transistors to manage signal flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are arranged densely to achieve narrower bezels and higher resolution, then the area for arranging driving circuits is reduced, but the risk of short circuiting increases
Solution Approach 1:
The patent implements a preliminary detection mechanism that checks voltage levels before allowing signal transmission. The detection unit measures the voltage of the input signal, and only when the voltage exceeds a predetermined threshold does the circuit permit signal output. This preliminary action prevents short circuiting before it can occur, resolving the contradiction by maintaining reliability while enabling dense signal line arrangement.
2Device complexity
If signal lines are arranged densely, then manufacturing complexity is reduced, but heat generation from short circuits increases causing polarizing plates to melt
Solution Approach 1:
The patent converts the potentially harmful short circuit condition into a detectable voltage level that can be used beneficially. By detecting the voltage level of the input signal, the system identifies conditions that would lead to short circuiting and prevents them. This transforms what would be a harmful thermal effect into a useful detection mechanism, allowing dense signal arrangement without the risk of heat generation from short circuits.
3Reliability
If a voltage detection and control mechanism is added to prevent short circuiting, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the detection unit, control unit, and level shifter unit into an integrated circuit structure. The detection unit detects voltage levels, the control unit processes this information, and the level shifter unit adjusts signal levels based on control signals - all three functions are combined in a single integrated design. This merging approach improves reliability through comprehensive voltage monitoring while minimizing the increase in device complexity by consolidating multiple functions into one unified circuit.
Data Source
AI summary
The present disclosure discloses a level shifter circuit and a display panel. The level shifter circuit includes a level shifter module, a compare module connected to the level shifter module. The level shifter module includes a level shifter unit, a control unit connected to the level shifter unit. The level shifter unit receives a first voltage signal and a second voltage signal and generates a level shifter result signal according to the first voltage signal and the second voltage signal. The compare module is configured to compare a voltage corresponding to the level shifter result signal with a reference voltage at a predetermined time and generate a comparison result. The control unit stops the shifter unit when the voltage corresponding to the level shifter result signal is less than the reference voltage. The present disclosure prevents the display panel from being damaged by short circuiting.