Display Driver Error Detection Using Line Latch Memory
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Transmission errors in image data to display drivers, particularly due to high-voltage noise, lead to image distortion and missing data, causing undesirable linear image distortions in display panels.
Innovation Solution
A display driver configuration that includes a receiver, line latch circuit, driving circuit, and timing controller to detect transmission errors and generate strobe signals, utilizing line memory and FIFO circuits to store and manage image data, ensuring data integrity and minimizing distortion by using previously received data when errors occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If image data is transmitted continuously to the display driver, then the display can operate at high speed, but transmission errors occur due to high-voltage noise causing image distortion
Solution Approach 1:
The patent applies preliminary action by storing image data in a line memory circuit before it is used by the display driver. This allows the system to have backup data ready in advance, so when a transmission error occurs, the display driver can immediately switch to using the stored data without waiting for retransmission, thus maintaining high display speed while improving reliability.
Solution Approach 2:
The line memory circuit acts as an intermediary between the data transmission path and the display driver. It buffers the image data and provides a fallback source when transmission errors occur, mediating between the need for continuous high-speed operation and the need for error recovery.
2Reliability
If error detection and recovery mechanisms are added to handle transmission errors, then image quality is maintained, but device complexity increases
Solution Approach 1:
The display driver is configured to autonomously detect transmission errors and switch to using stored image data from the line memory circuit without requiring external intervention or complex error correction protocols. This self-service approach maintains image quality while minimizing additional circuit complexity.
3Productivity
If transmission speed is increased to improve productivity, then display refresh rate improves, but susceptibility to high-voltage noise increases causing more transmission errors
Solution Approach 1:
The line memory circuit provides beforehand cushioning by storing backup image data in advance. When high-voltage noise causes transmission errors at high speeds, this pre-stored data acts as a cushion that prevents image distortion, allowing the system to maintain high transmission speeds without being as vulnerable to noise effects.
Data Source
AI summary
A display driver includes: a receiver configured to receive image data of each line of a display panel from an external device; a line latch circuit having a line latch configured to latch the image data of each line received by the receiver in response to a strobe signal; a driving circuit section which drives the display panel in response to the image data latched by the line latch; and a timing controller configured to generate the strobe signal. The receiver is configured to detect occurrence of transmission error in data transmission about each line. The timing controller is configured to generate the strobe signal in response to a detection result of the occurrence of transmission error.