Non-Volatile Memory Segmentation for Display Deterioration Data
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Solution Overview
Problem
High-resolution display devices face increased manufacturing costs and data loss due to the need for high-capacity memory to store pixel deterioration data, which can be exacerbated by abnormal terminations such as unexpected power-offs.
Innovation Solution
A display device with a non-volatile memory system that redundantly stores and verifies deterioration data using block units and validation techniques, allowing for stable storage and compensation of image data to maintain luminance, incorporating a controller and integration drivers to manage and update deterioration data between volatile and non-volatile memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high-capacity memory device is used to store deterioration data of pixels in a high-resolution display device, then the display quality can be maintained through compensation, but manufacturing costs increase and data loss risk increases due to abnormal termination
Solution Approach 1:
The memory device is divided into multiple memory sets, each storing deterioration data for a specific region or group of pixels. This segmentation allows the system to use smaller, lower-cost memory units while collectively covering the entire display panel, reducing overall manufacturing cost while maintaining comprehensive pixel deterioration compensation capability
Solution Approach 2:
The system performs preliminary validation by generating and storing validation data (such as checksums or error detection codes) along with the deterioration data before actual use. This preliminary action enables automatic detection and correction of data corruption due to abnormal termination, ensuring display quality maintenance without requiring expensive high-capacity memory with built-in error protection
2Reliability
If a high-capacity memory device is used to store deterioration data of pixels, then complete pixel compensation can be achieved, but data loss occurs due to abnormal termination
Solution Approach 1:
Validation data is generated and stored alongside the deterioration data before any potential abnormal termination occurs. This preliminary preparation enables the system to verify data integrity and recover from corruption without data loss
Solution Approach 2:
The system implements a feedback mechanism where validation data is continuously checked against stored deterioration data. When abnormal termination is detected, the feedback loop enables automatic detection of corrupted data and triggers recovery procedures using the validation information, preventing permanent data loss
3Reliability
If validation data is stored in each memory set to verify integrity, then data loss from abnormal termination is prevented, but memory complexity increases
Solution Approach 1:
The memory device is segmented into multiple independent memory sets, each with its own validation data. This segmentation localizes the complexity within small, manageable units rather than creating one complex large-scale memory structure, making the overall system easier to manufacture and manage while maintaining robust data protection
Solution Approach 2:
The validation mechanism uses simple parameter-based verification methods such as checksums or parity bits rather than complex error correction codes. This approach provides adequate data protection while minimizing the increase in memory complexity and maintaining ease of implementation
Data Source
AI summary
A display device includes a non-volatile memory device including a plurality of memory sets and a controller to store deterioration data of the pixels in each of the memory sets, to compensate input image data based on the deterioration data to generate output image data, and to provide output signals corresponding to the output image data to the scan driver and the data driver.