Display Drive Circuit Common Voltage Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The impedance within control circuit boards in display panels leads to deviations in common voltage, affecting the display effect, especially with increasing current loads and varying display pictures, which compromises the image quality in high-resolution and large-size liquid crystal panels.
Innovation Solution
A drive circuit with an initiator, compensator, and controller that compares the initial and output common voltage values, using switches, digital-analog converters, and microcontrollers to determine if compensation is needed, ensuring accurate voltage correction through a compensating signal code, thereby maintaining optimal display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control circuit board uses simple control processes, then the device complexity is reduced, but the common voltage deviation occurs due to impedance affecting display quality
Solution Approach 1:
The patent implements a feedback mechanism where the controller detects the actual common voltage output by the initiator, compares it with the expected voltage, and automatically adjusts the initiator's output through compensation signals. This closed-loop feedback system ensures accurate common voltage delivery despite impedance effects, resolving the contradiction between simple control and voltage precision.
Solution Approach 2:
The patent dynamically changes the common voltage parameter by adjusting the initiator's output voltage based on detected deviations. The controller modifies voltage parameters in real-time to compensate for impedance effects, maintaining display quality without requiring complex hardware architecture.
2Manufacturing precision
If high-resolution and large-size liquid crystal panels are used, then the display quality is improved, but the current load increases causing greater common voltage deviation
Solution Approach 1:
The feedback mechanism continuously monitors common voltage under varying current loads and automatically compensates for deviations. When high current loads from high-resolution panels cause voltage drops, the controller detects these changes and adjusts the initiator output accordingly, maintaining stable display performance despite increased power demands.
Solution Approach 2:
The system dynamically adapts to changing current load conditions by continuously adjusting the common voltage output. The controller modifies voltage parameters in real-time based on actual operating conditions, enabling the display system to maintain optimal performance across different resolution and size configurations.
3Device complexity
If the initiator directly outputs common voltage without compensation, then the device complexity is reduced, but the display effect is affected due to voltage deviation
Solution Approach 1:
The patent incorporates a feedback control system where the controller detects common voltage deviations and automatically generates compensation signals to adjust the initiator's output. This feedback mechanism ensures reliable display performance by maintaining accurate common voltage levels without requiring substantial hardware redesign.
Solution Approach 2:
The control system performs self-adjustment by automatically detecting and compensating for its own voltage deviations. The controller monitors the initiator's output and self-corrects any deviations through automated compensation, ensuring display reliability without external intervention or complex additional hardware.
Data Source
AI summary
This application discloses a drive circuit, a drive method and a display apparatus. The drive circuit includes: an initiator configured to output a common voltage, a compensator coupled to the initiator, and a controller; the initiator includes an initial memory configured to store an initial value of the common voltage, and an operational circuit configured to convert the initial value of the common voltage into an output common voltage to output; and the controller collects the initial value of the common voltage of the initiator and a value of the output common voltage, and compares the initial value of the common voltage and the value of the output common voltage, thereby deciding whether to control the compensator to compensate the value of the common voltage or not.