Display Driving Circuit Common Voltage Compensation
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Solution Overview
Problem
As display panel resolutions increase and sizes grow, the internal impedance in driving circuits leads to a drop in common voltage, affecting the display effect due to higher current draw and variations in the array layer's impact on common voltage, causing offset issues that existing technologies struggle to compensate for effectively.
Innovation Solution
A driving method and circuit that includes a compensator and initializer, where a controller collects the common voltage and activates the compensator to adjust it when the voltage falls below a preset threshold, using switches and a standard voltage circuit to ensure the common voltage remains within an optimal range, thereby reducing offset and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If display panel resolution and size are increased, then display quality and visual effect are improved, but common voltage drops due to higher current draw and internal impedance
Solution Approach 1:
The patent implements a feedback mechanism where the common voltage is continuously monitored and compared against a reference voltage. When the common voltage deviates from the reference (indicating a drop due to high current draw), the system automatically activates the compensator to adjust the voltage back to the correct level, ensuring stable operation of the display panel despite increased resolution and size requirements
Solution Approach 2:
The patent dynamically changes the common voltage parameter based on operational conditions. By detecting when the common voltage drops below the reference level, the system adjusts the voltage parameter through the compensator to maintain it within the optimal range, thereby resolving the contradiction between high power consumption and voltage stability
2Area of stationary object
If display panel size is increased, then visual coverage is improved, but voltage offset increases due to internal impedance
Solution Approach 1:
The feedback circuit continuously monitors the common voltage level and compares it with the reference voltage. When voltage offset occurs due to the larger panel size and associated internal impedance, the system detects this deviation and activates the compensator to correct the voltage, ensuring precise voltage control across the entire display panel area
3Measurement precision
If higher resolution is implemented, then image detail is improved, but current draw increases causing common voltage to drop
Solution Approach 1:
The system uses feedback to detect when common voltage drops occur due to increased current draw from higher resolution operations. The comparator circuit continuously compares the common voltage with the reference voltage, and when a drop is detected, the compensator is activated to restore the voltage to its proper level, allowing high resolution operation without voltage instability
Solution Approach 2:
The patent dynamically adjusts the common voltage parameter in response to changing current draw conditions. When high current draw causes voltage to drop below the reference level, the system changes the voltage parameter through compensator activation, maintaining stable operation despite varying power consumption demands
Data Source
AI summary
The present application discloses a driving method, a driving circuit, and a display device. The driving circuit includes an initializer that outputs a common voltage, a compensator coupled to the initializer, and a controller that collects the common voltage output from the initializer, where when the common voltage is less than a preset threshold, the controller controls the compensator to compensate for a value of the common voltage.