LCD Mura Compensation Data Shift Storage Method
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Solution Overview
Problem
Conventional liquid crystal display (LCD) technologies face challenges in achieving uniform grayscale images due to mura issues, where the storage of mura compensation data is limited by the flash's data range, leading to a gap between stored and real values, and increasing the flash volume and cost to address this issue.
Innovation Solution
A method and device for LCDs that determine a shift amount to adjust the target compensation data within the storable data range, allowing precise storage and compensation of mura data without increasing the flash volume or cost, by comparing the data range of the target compensation data with the storable data range and applying an adjusting process to fit the data within the storage limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the mura compensation data is stored directly in the flash without adjustment, then the data precision is maintained, but the flash volume and cost increase to accommodate the full data range
Solution Approach 1:
The patent applies parameter changes by transforming the mura compensation data through a shift operation. The driver converts the original compensation data (which may fall outside the flash's storable range) into adjusted data that fits within the flash's data range [A, B], while preserving the essential compensation information. This allows full-range compensation data to be stored in limited-capacity flash memory without losing precision.
Solution Approach 2:
The patent introduces an additional dimension by storing not only the adjusted compensation data but also the corresponding shift amounts in the flash. This two-part storage approach (adjusted data + shift amount) enables the system to reconstruct the original full-range compensation values during operation, effectively expanding the storage capability beyond the flash's native data range.
2Volume of stationary object
If the mura compensation data is adjusted to fit the flash storing range, then the flash volume is reduced, but a gap appears between the stored data and real values
Solution Approach 1:
The patent implements a feedback mechanism where the stored shift amount is retrieved and applied during the compensation process. The driver reads back the previously stored shift amount and uses it to reverse the adjustment, adding the shift amount to the read compensation data to reconstruct the original full-range value. This feedback loop ensures that the final compensation applied to the display maintains high precision despite the intermediate storage adjustment.
Solution Approach 2:
The patent applies preliminary action by pre-calculating and storing the shift amount alongside the adjusted compensation data. This preparatory step ensures that when the data is retrieved, the system already has the information needed to accurately reconstruct the original compensation values, eliminating any precision loss that would otherwise occur during storage.
3Measurement precision
If the flash data range is enlarged to store full-range compensation data, then the data precision is maintained, but the manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by transforming the compensation data through a mathematical shift operation that maps the full-range data into the flash's limited storable range. This data transformation allows standard-capacity flash (lower cost) to effectively store and retrieve full-range compensation data with maintained precision, avoiding the need for expensive high-capacity flash.
Solution Approach 2:
The patent introduces an intermediary mechanism (the shift amount) that mediates between the flash's limited storage capability and the full-range compensation data requirement. By using this intermediary value to adjust and reconstruct the data, the system achieves high-precision storage without requiring expensive enlarged flash capacity.
Data Source
AI summary
The present disclosure relates to a storing method of compensation data of liquid crystal devices (LCDs) and a data compensation device. The storing method includes obtaining a target compensation data of a target display area, comparing a data range of the target compensation data and a storable data range of a predetermined storing space to determine a shift amount, adopting an adjusting process to the target compensation data with the shift amount to obtain the storing compensation data fitting the storable data range, and storing the shift amount and storing the compensation data. In this way, not only the precision of the data compensation may be enhanced, but also the mura issue may be effectively eliminated without increasing the volume of the flash and the cost.