Display Correction Circuit for Luminance Optimization
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Solution Overview
Problem
Existing liquid-crystal display apparatuses face issues with luminance optimization due to unequal pixel electric potential corrections, leading to differences in positive and negative polarity leak currents and adverse effects on γ characteristic, yield, and merchantability.
Innovation Solution
A display apparatus with a correction circuit that detects the difference between positive and negative pixel electric potentials and compares it with a reference voltage to generate a correction signal, ensuring the difference remains constant, thereby optimizing the storage-capacitor voltage and optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional correction methods are used, then manufacturing simplicity is maintained, but luminance optimization and γ characteristic are degraded due to unequal pixel electric potential corrections
Solution Approach 1:
The correction circuit uses feedback mechanisms to detect pixel electric potential differences and adjust storage capacitor voltages accordingly. The circuit monitors the actual pixel potentials and dynamically corrects them to maintain optimal luminance and γ characteristics, resolving the contradiction between manufacturing precision and device complexity by implementing intelligent correction only when needed.
Solution Approach 2:
The invention changes the voltage parameters applied to storage capacitors based on detected pixel electric potential differences. By adjusting the storage capacitor voltages dynamically, the system optimizes luminance and γ characteristics without requiring complete redesign of the display structure, thus improving manufacturing precision while controlling device complexity.
2Manufacturing precision
If pixel electric potential corrections are applied, then luminance is optimized, but differences in positive and negative polarity leak currents occur
Solution Approach 1:
The correction circuit applies asymmetric correction strategies for positive and negative polarity pixels. By detecting the specific polarity of each pixel and applying tailored voltage adjustments to their storage capacitors, the system optimizes luminance for each polarity while compensating for different leak current characteristics, thus resolving the contradiction between luminance uniformity and leak current consistency.
3Productivity
If conventional driving methods are used, then device simplicity is maintained, but yield and merchantability are reduced due to γ characteristic degradation
Solution Approach 1:
The correction circuit performs preliminary adjustments to storage capacitor voltages before pixel display operations. By pre-correcting pixel electric potentials based on detected differences, the system ensures optimal γ characteristics and luminance uniformity from the start, improving yield without requiring complex post-processing or repeated adjustments that would increase overall system complexity.
Data Source
AI summary
A display apparatus including: a pixel section having a plurality of pixel circuits arranged two-dimensionally by being each provided at an intersection of a scan line and a signal line as a circuit including a switching device, a display element and a storage capacitor; and a correction circuit for correcting a storage-capacitor voltage supplied to the storage capacitors, wherein the correction circuit employs a comparator for detecting the difference between electric potentials received from a portion of the pixel section as a pixel electric potential having a positive polarity and a pixel electric potential having a negative polarity and for comparing the difference in electric potential with a reference voltage, and an output-voltage control circuit for converting a comparison result output by the comparator into a correction signal used for correcting the storage-capacitor voltage to be asserted on a storage-capacitor line used for supplying the storage-capacitor voltage.