Level Shifter Timing Control for Display Wire Temperature
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Solution Overview
Problem
Rapid voltage switching in display panels at higher frequencies leads to significant temperature changes in the wire of area, affecting display quality.
Innovation Solution
A level shifter circuit with separate control over the time intervals of rising and falling edges of the output voltage, achieved through the use of transistors and signal generating circuits with variable resistance elements, adjusts the time intervals of control signals to manage voltage transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the display panel is driven at a higher frequency, then the productivity is improved, but the temperature change in the wire of area increases causing display quality to deteriorate
Solution Approach 1:
The patent segments the voltage transition process into two independent controllable phases: rising edge transition and falling edge transition. By using separate control signals (first control signal and second control signal) with independently adjustable time intervals, the patent can optimize each phase separately to reduce overall temperature change while maintaining high driving frequency
Solution Approach 2:
The patent dynamically adjusts the time intervals of voltage transitions based on operational requirements. The first time interval (rising edge) and second time interval (falling edge) can be independently tuned to optimize performance at different operating conditions, allowing the system to maintain high frequency operation while controlling temperature rise through adaptive timing control
2Productivity
If the output voltage level is switched rapidly, then the productivity is improved, but the temperature change in the wire of area increases affecting display quality
Solution Approach 1:
The patent employs periodic voltage switching with controlled duty cycles and time intervals. By regulating the duration of rising edges and falling edges separately, the system achieves rapid periodic voltage transitions that improve productivity while the controlled time intervals prevent excessive temperature accumulation in the wire of area
Solution Approach 2:
The patent changes the temporal parameters of voltage transitions by independently adjusting the time interval of rising edges and the time interval of falling edges. This parameter optimization allows rapid voltage switching for high productivity while controlling the thermal effects that would otherwise degrade display quality
Data Source
AI summary
The disclosure provides a level shifter circuit. The level shifter circuit includes a first transistor and a second transistor. The first transistor and the second transistor generate an output voltage according to a first control signal and a second control signal, respectively. A time interval of rising edges of the output voltage is greater than a time interval of falling edges of the output voltage.