Panel Driving Device Reference Voltage Switching
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Solution Overview
Problem
The increase in voltage required to drive liquid crystal panels for gaming products leads to a significant increase in power consumption, necessitating a more efficient method to enhance driving voltage without increasing wattage.
Innovation Solution
A panel driving device that utilizes two reference voltage values during positive and negative frame periods, maintaining equal absolute driving voltage values and incorporating a charging period with an intermediate voltage value to optimize liquid crystal driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the voltage written into pixels is increased to drive liquid crystal for gaming products, then the driving voltage increases, but the power consumption increases significantly
Solution Approach 1:
The patent changes the reference voltage parameter dynamically between positive and negative frame periods. By switching between a first reference voltage value and a second reference voltage value, the system achieves different driving voltage conditions without permanently increasing the voltage written into pixels, thus maintaining lower power consumption while achieving high driving voltage when needed
Solution Approach 2:
The patent implements periodic switching of reference voltage values synchronized with frame periods. During positive frame periods, one reference voltage is used; during negative frame periods, another reference voltage is used. This periodic action allows the liquid crystal to experience high driving voltage conditions periodically for gaming performance while averaging lower power consumption over complete frame cycles
2Device complexity
If a single reference voltage is used for driving liquid crystal, then the circuit design is simple, but the driving voltage cannot be optimized for both positive and negative frame periods
Solution Approach 1:
The patent introduces dynamic switching capability to the reference voltage circuit. Instead of a fixed reference voltage, the circuit dynamically selects between two reference voltage values based on the current frame period polarity. This dynamic approach enables optimized driving voltage for both positive and negative frame periods while keeping the circuit structure relatively simple through controlled switching
Data Source
AI summary
A panel driving device includes panel. Panel includes data line, reference electrode line and first pixel. Data line transmits data signal. Reference electrode line transmits reference signal. First pixel generates pixel signal according to data signal and reference signal. During positive frame period, difference between first voltage value of pixel signal and first reference voltage value of reference signal is first driving voltage value. During negative frame period, difference between second voltage value of pixel signal and second reference voltage value of reference signal is second driving voltage value. Absolute value of first driving voltage value is about the same as absolute value of second driving voltage value. During charging period which is between negative and positive frame periods, pixel signal has a third voltage value, which is greater than second voltage value, and third voltage value is less than or equal to first voltage value.