Vehicular AV Error Detection IC for Image-Sound Matching
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Solution Overview
Problem
Existing LCD modules in vehicle AV systems equipped with a T-CON face challenges in error detection for fixed images and warning sounds, requiring new designs and incurring additional development costs, and existing error detection ICs are not compatible with these modules.
Innovation Solution
An error detection IC that includes a third interface unit for audio signals, an audio determination unit, a matching determination unit, and a fourth interface unit to detect errors in both fixed images and warning sounds, ensuring compatibility with existing LCD modules equipped with a T-CON.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional T-CON for error detection is used, then error detection capability is improved, but compatibility with existing LCD modules is lost requiring new module design
Solution Approach 1:
The error detection function is segmented from the T-CON and implemented as a separate IC. This allows the T-CON to maintain its original mini-LVDS interface while the error detection IC handles Open LDI signal monitoring, enabling independent optimization of each component and compatibility with existing LCD modules.
Solution Approach 2:
The error detection IC acts as an intermediary between the Open LDI interface and the mini-LVDS interface. It receives Open LDI signals, performs error detection, and outputs control signals to the LCD module while maintaining compatibility with both interface standards through its dual-interface design.
2Reliability
If LCD module is equipped with T-CON for error detection, then error detection function is added, but device complexity increases
Solution Approach 1:
The system is divided into functional modules: the existing T-CON handles display control while the new error detection IC handles signal monitoring. This segmentation allows each component to perform its specialized function without increasing overall system complexity, as the error detection IC integrates multiple functions in a single chip.
Solution Approach 2:
The error detection IC performs multiple functions including Open LDI signal reception, error detection, warning sound generation, and controller communication. This multi-functionality consolidates what would otherwise require multiple separate components, thereby reducing device complexity while maintaining comprehensive error detection capability.
3Adaptability or versatility
If new LCD module design is created for error detection, then error detection compatibility is improved, but development cost increases
Solution Approach 1:
By separating the error detection function into an independent IC, existing LCD modules can be retrofitted with error detection capability simply by adding the new IC, rather than redesigning the entire module. This significantly reduces development costs while maintaining full error detection compatibility.
Solution Approach 2:
The error detection IC serves as an intermediary component that bridges existing LCD modules with error detection requirements. It interfaces with standard Open LDI signals and communicates with the controller through conventional interfaces, allowing integration without module redesign and thereby reducing development costs.
Data Source
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AI summary
The present disclosure relates to an error detection IC including: a first interface unit configured to receive a first signal for outputting a specific fixed image to a display apparatus provided in a vehicle; a memory in which data for one or more fixed images are stored; a signal processing unit configured to select a fixed image to be output to the display apparatus from among the one or more fixed images, based on the first signal, and to output a second signal for outputting the selected fixed image to the display apparatus; an image determination unit configured to provide a signal informing an error of the fixed image to a controller of the vehicle, when it is determined that the error exists in data for the selected fixed image included in the second signal, based on the data stored in the memory; and a second interface unit configured to provide the second signal to a display module.