Display Driving Data Checksum Verification Against Noise Corruption
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Solution Overview
Problem
Display devices face issues with distorted driving data due to external noise, leading to impaired picture quality and customer complaints, as the data transmitted from external memory to built-in memory can be corrupted during the process.
Innovation Solution
A display device and method that utilize check SUM data to detect errors in the driving data, re-transmitting the data from an external memory to a built-in memory if discrepancies are found, ensuring the data stored in both memory types remains consistent, using a data error detection/correction unit to generate and compare check SUM data and drive the ROM interface to re-supply the data if errors are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving data is transmitted from external memory to built-in memory, then the display device can store and use the driving data, but the driving data may be distorted by external noise or static electricity
Solution Approach 1:
The patent applies preliminary action by calculating and storing check SUM data alongside the driving data in the external memory before transmission. This pre-computed verification data allows the system to detect potential distortions caused by external noise or static electricity during transmission, enabling corrective measures to be taken before the distorted data is used, thus resolving the contradiction between data storage reliability and susceptibility to external noise distortion.
2Productivity
If the driving data is stored in the built-in memory, then the display device can maintain the data for driving the display panel, but errors in the driving data impair picture quality
Solution Approach 1:
The patent implements feedback by comparing the check SUM data with the driving data after transmission to the built-in memory. When a discrepancy is detected, indicating data distortion or error, the system triggers a re-transmission process to replace the corrupted data. This feedback mechanism ensures that only accurate driving data is used, maintaining both continuous display operation and high picture quality without compromising either productivity or manufacturing precision.
3Reliability
If check SUM data is added to verify driving data, then data errors can be detected and corrected, but the device complexity increases
Solution Approach 1:
The patent applies copying by creating a check SUM data structure that is a simplified representation or derivative of the driving data itself. Rather than using complex encryption or multiple verification layers, the system generates a condensed verification code that can be easily stored alongside the original data and quickly compared during transmission. This copying approach enhances data reliability through error detection and correction while minimizing the increase in device complexity by using a lightweight verification mechanism.
Data Source
AI summary
Disclosed is a display device including a first storage unit having driving data for driving a display panel and a first check SUM data on the driving data stored therein, a second storage unit for retrieving the driving data and the first check SUM data from the first storage unit and storing the driving data and the check SUM data in response to the instruction of a ROM interface, and a data error detection/correction unit generating a second check SUM data with reference to the driving data stored in the second storage unit.