Light Source Controller Error Detection for Local Dimming Links
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Solution Overview
Problem
Existing lamp controllers can only perform error checks on individual software processes, limiting comprehensive error detection to either the lamp controller or the patterning device, and do not allow for integrated error detection across the entire system.
Innovation Solution
A controller system that includes a control data generation circuit, interface circuits, storage circuits, and an error detection circuit to perform comprehensive error detection across the entire light source control system, allowing for detection of errors in both the controller and the light source driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If error detection is performed only within individual devices (controller or light source driver), then device complexity is reduced, but measurement precision of system-wide errors deteriorates
Solution Approach 1:
The patent merges error detection functionality into a centralized error detection circuit within the controller, which coordinates with the light source driver to perform comprehensive error detection across the entire system. This combines the detection capabilities of both devices into a unified system-wide detection mechanism, resolving the contradiction by achieving full coverage without distributing complex detection logic across multiple independent devices.
Solution Approach 2:
The patent implements feedback mechanisms where the error detection circuit continuously monitors control data transmission between the controller and light source driver, and feeds back error information to both devices. This feedback loop enables system-wide error detection while maintaining manageable device complexity through centralized coordination and standardized communication protocols.
2Reliability
If comprehensive error detection across the entire system is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the error detection system into distinct functional modules: an error detection circuit within the controller, a second storage circuit in the light source driver, and coordinated data transmission pathways. This segmentation allows comprehensive system-wide detection while keeping each component's complexity manageable through clear division of responsibilities and standardized interfaces.
Solution Approach 2:
The controller's error detection circuit serves multiple functions: it detects errors in control data generated by the controller, errors in transmitted control data, and coordinates with the light source driver for comprehensive system monitoring. This multi-functionality achieves high reliability without proportionally increasing device complexity by maximizing the utility of each component.
3Measurement precision
If error detection is performed at multiple levels (controller and light source driver), then measurement precision of error location is improved, but loss of time for error processing increases
Solution Approach 1:
The patent implements preliminary error detection by the error detection circuit in the controller before control data is transmitted to the light source driver. This preliminary check identifies and flags errors early in the data flow, enabling rapid response and reducing overall error processing time while maintaining precise error location through the coordinated detection architecture.
Data Source
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AI summary
A controller includes a control data generation circuit that generates control data based on luminance data, a first interface circuit that transmits the control data, a first storage circuit that stores first comparison data based on the luminance data or the control data, and an error detection circuit. A light source driver includes a second interface circuit that receives the control data, a second storage circuit that stores the control data, and a drive circuit that drives a light source based on the control data. The error detection circuit compares the first comparison data with second comparison data based on the control data received by the first interface circuit from the second interface circuit.