Display Device Temperature-Based Current Density Control
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Solution Overview
Problem
Current display devices face challenges in optimizing luminous efficiency and reducing power consumption, as existing technologies do not effectively manage temperature and luminance data to control current density optimally across light-emitting elements.
Innovation Solution
A display device and method that include light-emitting units with temperature and luminance data storage, and a compensator that extracts element sets based on temperature and luminance data to generate compensation data, adjusting current application to optimize luminous efficiency and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current density is increased to improve luminous efficiency, then power consumption increases and device lifespan decreases
Solution Approach 1:
The patent applies local quality by dividing the display device into multiple element sets and applying different current densities to each set based on their specific temperature characteristics. High-temperature element sets receive reduced current density while low-temperature element sets receive higher current density, optimizing overall luminous efficiency while managing power consumption and device lifespan
Solution Approach 2:
The patent changes the current density parameter dynamically based on temperature measurements. By adjusting current density as a variable parameter rather than using a fixed value, the system optimizes luminous efficiency while preventing excessive power consumption and heat generation in high-temperature regions
2Productivity
If current density is increased to improve luminous efficiency, then device lifespan decreases
Solution Approach 1:
The patent extends device lifespan by applying local quality control through temperature-based current density adjustment. Element sets operating at high temperatures receive reduced current density to prevent degradation, while cooler element sets operate at higher current density for optimal performance, thereby balancing luminous efficiency with device lifespan across the entire display
Solution Approach 2:
The patent implements feedback control by continuously monitoring temperature data from multiple element sets and adjusting current density assignments accordingly. This closed-loop system ensures that luminous efficiency is maintained while preventing conditions that would reduce device lifespan through excessive heat or current stress
3Productivity
If temperature-based current control is implemented, then system complexity increases
Solution Approach 1:
The patent manages system complexity through segmentation by dividing the display into discrete element sets with identifiable temperature characteristics. Each element set can be independently monitored and controlled, simplifying the implementation of temperature-based current density adjustment while maintaining high luminous efficiency
Solution Approach 2:
The patent reduces system complexity by implementing self-service mechanisms where the display system automatically monitors its own temperature and adjusts current density without external intervention. The controller autonomously optimizes luminous efficiency based on real-time temperature feedback from embedded sensors
Data Source
AI summary
A display device includes light-emitting units including at least one element set including light-emitting elements; a first storage unit that stores temperature data of the at least one element set; and a compensator that extracts a first element set having temperature data of a higher temperature than an average temperature among the temperature data of the at least one element set and compensates for image data based on the extracted first element set to generate compensation data.