Liquid Crystal Display Self-Diagnosis Controller
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Solution Overview
Problem
Current liquid crystal display devices lack effective diagnostic capabilities, leading to inconvenience and potential safety issues when abnormal conditions occur, such as a non-functional navigator screen in vehicles, as they cannot self-diagnose and transfer simplified diagnosis results to a system controller without complex wiring and multiple signal lines.
Innovation Solution
Incorporating a diagnosis controller within the liquid crystal display device to detect abnormal signals and generate diagnosis results, allowing each device to self-diagnose and transfer simplified results to a system controller via a single signal line, thereby simplifying the diagnostic process and reducing the complexity of wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid crystal display device lacks diagnostic capabilities, then the device structure remains simple, but the reliability and safety of the system deteriorate when abnormal conditions occur
Solution Approach 1:
The liquid crystal display device performs self-diagnosis by detecting abnormal signals from its own components (LVDS interface, timing controller, data driver circuit, backlight driver, supply voltage generator) and generates diagnosis results independently, eliminating the need for complex external diagnostic systems while improving reliability
Solution Approach 2:
The diagnostic function is segmented into independent modules within the display device, with each component (LVDS interface, timing controller, data driver circuit, backlight driver, supply voltage generator) having dedicated detection capabilities, allowing localized diagnosis without affecting the entire system complexity
2Measurement precision
If multiple signal lines are used to transfer diagnosis results from the liquid crystal display device to the system controller, then the measurement precision of the diagnostic information is improved, but the wiring complexity and device complexity increase
Solution Approach 1:
Multiple diagnosis results from different components (LVDS interface, timing controller, data driver circuit, backlight driver, supply voltage generator) are merged into a single comprehensive diagnosis result that is transmitted through one signal line to the system controller, reducing wiring complexity while maintaining diagnostic precision
Solution Approach 2:
A diagnosis controller acts as an intermediary that collects abnormal signals from various components, processes them locally, and transmits the consolidated diagnosis result through a single signal line to the system controller, eliminating the need for multiple direct connection lines
Data Source
AI summary
A liquid crystal display device is disclosed which includes a diagnosis controller configured to receive abnormity detection signals representing whether components of the liquid crystal display device are functioning normal. The components of the liquid crystal display device may include an LVDS interface, a timing controller, a data driver circuit, a backlight driver, a supply voltage generator. Such a liquid crystal display device handles treatable abnormities without any external help. In accordance therewith, complexity caused by transferring a large number of signals can be simplified.