Offset Adjusting Circuit for Display Driving Signal Compensation
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Solution Overview
Problem
Display devices face issues with image uniformity due to offset voltages generated during the manufacturing process of data drivers, leading to reduced sharpness of images displayed on panels.
Innovation Solution
A display driving device with an offset adjusting circuit that includes an offset detector and corrector, which detects and subtracts offset voltages from input image signals to generate corrected signals, thereby compensating for these voltages and improving image uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If offset voltages are not compensated, then device complexity is reduced, but image uniformity deteriorates
Solution Approach 1:
The offset adjusting circuit performs offset voltage compensation in advance by detecting offset voltages during a test period and storing correction values in a memory device before normal display operation begins. This preliminary action ensures image uniformity is maintained throughout operation without adding complexity to the core display function.
Solution Approach 2:
A memory device is introduced as an intermediary component to store offset voltage correction values. This intermediary allows the system to compensate for offset voltages without requiring complex real-time calculation circuits, thereby improving image uniformity while minimizing the increase in device complexity.
2Manufacturing precision
If offset adjusting circuit is added, then image uniformity is improved, but device complexity increases
Solution Approach 1:
Offset voltage detection and correction value generation is performed during an initial test period before normal operation. This preliminary action allows the offset adjusting circuit to prepare correction values in advance, improving image uniformity without requiring complex real-time processing during display operation.
Solution Approach 2:
The offset adjusting circuit automatically detects offset voltages and generates correction values without requiring external intervention or complex control logic. This self-service approach improves image uniformity while keeping the circuit design relatively simple by eliminating the need for manual calibration or complex control systems.
3Manufacturing precision
If offset voltages are detected and corrected, then image sharpness is improved, but manufacturing process complexity increases
Solution Approach 1:
Offset voltage detection and correction value storage is performed during an initial test period before normal display operation. This preliminary action ensures image sharpness is improved during actual use without requiring complex manufacturing processes, as the correction values are automatically captured and stored during a simple initialization phase.
Solution Approach 2:
The offset detecting circuit provides feedback about offset voltages to the offset adjusting circuit, which then generates appropriate correction values. This feedback mechanism automatically compensates for manufacturing variations in output drivers, improving image sharpness without requiring complex manual calibration processes during manufacturing.
Data Source
AI summary
A display driving device includes a data driver having a plurality of output drivers configured to output display driving signals. The display driving device also includes an offset adjusting circuit configured to subtract offset voltages generated in the output drivers from an input image signal to generate a corrected image signal. The offset adjusting circuit transmits the corrected image signal to the data driver, so that the data driver outputs the driving signals based on the corrected image signal.