Dynamic Non-Uniformity Correction for Display Devices
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Solution Overview
Problem
Conventional image display apparatuses face challenges in achieving uniformity across the screen due to non-uniformity generated by display elements, which cannot be completely corrected with fixed correction amounts, especially as temperature and other conditions change.
Innovation Solution
An image display apparatus that includes a signal input unit, a signal-for-display generator, a non-uniformity corrector, an apparatus state-detector, and an arithmetic unit that calculates and applies dynamic correction amounts based on detected states such as orientation, temperature, and operating time to ensure uniform image display across the entire screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed correction amounts are used to correct non-uniformity in display elements, then the correction process is simple, but the uniformity of image display deteriorates under changing temperature and operating conditions
Solution Approach 1:
The patent implements dynamic correction by continuously detecting operating conditions (temperature, elapsed time) and adjusting correction amounts in real-time based on detected states. This transforms the static fixed correction approach into a dynamic adaptive system that maintains image uniformity across varying conditions without requiring overly complex manual calibration procedures
Solution Approach 2:
The system employs feedback mechanisms by detecting actual operating conditions and using this information to adjust correction amounts. The correction amounts are determined based on feedback from temperature sensors and operation time counters, creating a closed-loop system that automatically adapts to maintain display uniformity
2Manufacturing precision
If dynamic correction amounts based on temperature and operating time are implemented, then image uniformity is maintained under varying conditions, but device complexity increases
Solution Approach 1:
The patent changes physical parameters (temperature, operation time) to determine appropriate correction amounts. By monitoring these parameters and adjusting correction values accordingly, the system maintains image uniformity while using relatively simple sensing and processing components
Solution Approach 2:
The system performs preliminary detection of operating conditions and pre-calculates correction amounts before displaying images. Correction amounts are determined in advance based on detected temperature and elapsed time, allowing the actual correction process to be straightforward without complex real-time computations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus effectively corrects non-uniformity across the screen, ensuring high-quality, uniform image display under various conditions without the need for special correction means, thereby providing a cost-effective solution for maintaining image quality.
Implementation Method 1
a liquid crystal panel 24 which displays, as an image, an input signal in a format converted by the signal converter 22
Data Source
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AI summary
In an image display apparatus of the invention, a signal input unit outputs a complex image signal, which has been converted to an easily-processed format, to a signal-for-display generator. The signal-for-display generator converts the complex image signal to a signal suitable for displaying at a display unit. An apparatus state-detector detects a state of the display apparatus. Based on apparatus state information input from the apparatus state-detector, an arithmetic unit calculates an amount of non-uniformity to be corrected, and outputs it to a non-uniformity corrector. Based on the non-uniformity correction amount corresponding to a position displayed at the display unit, the non-uniformity corrector corrects the image signal input from the signal-for-display generator, converts it to a signal format that can be used at the display unit, and outputs it.