Light Source Controller Error Detection Across Driver Communication
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Solution Overview
Problem
Existing lamp controllers can only perform individual error checks on 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, storage circuits, and an error detection circuit to perform comprehensive error detection by comparing control data with stored comparison data, enabling integrated error detection across the controller and light source driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual error checks are performed only in the lamp controller or patterning device, then device complexity is reduced, but error detection coverage is insufficient
Solution Approach 1:
The error detection function is segmented and distributed to multiple components: the lamp controller generates first comparison data from control data, the light source driver stores and transmits control data, and the lamp controller performs final comparison. This segmentation enables comprehensive error detection across the entire system without requiring a single complex error checking unit.
Solution Approach 2:
The light source driver acts as an intermediary that receives control data, stores it in a storage circuit, and transmits it back to the lamp controller for error checking. This intermediary role enables the lamp controller to verify data integrity by comparing original control data with transmitted data, expanding error detection coverage without adding complex error checking logic to the light source driver.
2Reliability
If comprehensive error detection is implemented across the entire system, then reliability improves, but processing time increases
Solution Approach 1:
The light source driver performs preliminary actions by storing control data in a storage circuit immediately upon receipt and preparing it for transmission. The lamp controller simultaneously generates first comparison data from the control data before transmission. These preliminary actions enable rapid error checking without adding processing delays during the actual error detection phase.
Solution Approach 2:
The light source driver creates a copy of the control data in its storage circuit and transmits this copy back to the lamp controller for verification. The lamp controller compares the original control data with this copied data to detect errors. This copying mechanism enables comprehensive error detection without requiring complex real-time verification, maintaining fast processing speeds.
3Measurement precision
If error check code calculations are performed in the light source driver, then detection precision improves, but device complexity increases
Solution Approach 1:
The error check code calculation function is extracted from the light source driver and placed in the lamp controller. The light source driver simply stores and transmits control data without performing error check calculations. The lamp controller generates first comparison data from the control data and performs the actual error checking by comparing it with transmitted data. This extraction maintains high error detection precision while keeping the light source driver simple.
Solution Approach 2:
The lamp controller performs self-service by generating its own first comparison data from the control data it creates, and then using this self-generated data to verify the integrity of transmitted data. This self-service approach enables precise error detection without requiring external error check code calculations from the light source driver, maintaining system simplicity.
Data Source
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.