Display Driver Circuit Defect Correction via Nonvolatile Memory
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display driver circuits require time-consuming and costly defect correction processes, necessitating an efficient method to supplement defects with minimal time and cost.
Innovation Solution
Incorporating a revision controller to read and apply instructions from a nonvolatile memory for controlling the display driver circuit, allowing for dynamic adjustment of control data to correct defects, thereby reducing operational downtime and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If defect correction is performed through traditional manufacturing processes, then manufacturing precision is improved, but loss of time and manufacturing cost increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-programming multiple sets of control data corresponding to different defect conditions into the memory device before the display driver circuit is manufactured. When defects are detected, the system can immediately switch to the corresponding pre-prepared control data without requiring time-consuming rework or remanufacturing processes, thus resolving the contradiction between achieving defect correction precision and minimizing correction time
Solution Approach 2:
The patent implements parameter changes by dynamically switching between different control data sets stored in memory based on detected defect conditions. Instead of physically modifying the circuit, the system changes operational parameters (control data) to compensate for defects, thereby achieving precise defect correction without incurring manufacturing rework time and costs
2Manufacturing precision
If traditional defect correction methods are used, then manufacturing precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies copying by creating multiple copies of control data corresponding to different defect scenarios and storing them in the memory device. This allows the system to select and apply the appropriate control data copy without requiring expensive physical modifications or remanufacturing processes, thereby achieving defect correction precision while minimizing manufacturing costs
Solution Approach 2:
The system resolves the contradiction by changing operational parameters (control data) rather than physically modifying the circuit. This software-based approach to defect correction is significantly less costly than traditional hardware rework while maintaining the same level of correction precision
3Productivity
If pre-stored instructions are used for defect correction, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a multi-functional memory device that not only stores control data for normal operation but also stores multiple sets of control data for correcting various defect conditions. This universal storage solution enables the system to handle both normal operation and defect correction through a single integrated component, improving productivity without proportionally increasing device complexity
Solution Approach 2:
The memory device acts as an intermediary between the display driver circuit and the defect correction process. By storing pre-programmed control data for various defect conditions, the memory mediates the correction process, allowing the circuit to switch between normal and corrected operation modes without requiring complex additional correction circuitry, thus improving productivity while limiting complexity increase
Data Source
AI summary
A display driver circuit may include a revision controller for controlling a nonvolatile memory having instructions by which control data for controlling devices controlled by the display driver circuit are changed, and a drive controller for controlling the devices based on the instructions. The revision controller determines whether to perform a read operation to the instructions based on electrical power being applied to the display driver circuit, and transfers instruction signals, which are generated based on the determination to perform the read operation, to the driving controller.