Display Panel Surface Temperature Estimation Using Segmented Power Data
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Solution Overview
Problem
The existing display devices cannot accurately estimate pixel deterioration due to the misalignment of temperature sensors on the rear substrate with light-emitting elements on the front panel, leading to improper control of pixel driving.
Innovation Solution
A display device that includes a substrate temperature obtainer, power obtainer, increased temperature deriver, and surface temperature estimator to estimate the panel surface temperature by combining substrate temperature with power usage data from segmented regions, allowing for accurate pixel deterioration assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a temperature sensor is provided on the circuit substrate on the rear of the display panel, then the temperature measurement is simplified and device complexity is reduced, but the temperature measurement accuracy of the panel surface deteriorates
Solution Approach 1:
The patent introduces power consumption data as an intermediary parameter to bridge the gap between substrate temperature measurement and panel surface temperature estimation. By using the relationship between power consumption and temperature increase, the system can estimate surface temperature without direct contact sensors on the panel surface.
Solution Approach 2:
The patent replaces the mechanical/physical approach of placing temperature sensors directly on the panel surface with an electronic calculation approach. The system substitutes direct thermal measurement with computational estimation based on power consumption data and thermal models, eliminating the need for complex sensor placement.
2Ease of manufacture
If temperature sensors are placed on the rear substrate, then manufacturing and installation is easier, but the ability to accurately monitor light-emitting element deterioration deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where power consumption data is continuously monitored and used to estimate temperature, which in turn is used to assess light-emitting element deterioration. This closed-loop feedback system maintains reliability by continuously updating deterioration assessments based on actual operating conditions.
Solution Approach 2:
The system uses the display panel's own power consumption data to monitor its own temperature and deterioration, eliminating the need for external monitoring equipment. The panel essentially monitors itself by utilizing its operational data for self-diagnosis.
3Measurement precision
If power consumption data from segmented regions is obtained and used for temperature estimation, then surface temperature estimation accuracy is improved, but device complexity and data processing requirements increase
Solution Approach 1:
The patent divides the display panel into multiple segmented regions and obtains power consumption data for each segment. This segmentation allows for localized temperature estimation that reflects actual usage patterns in different areas of the panel, improving accuracy while keeping data processing manageable through regional aggregation.
Data Source
AI summary
A display device includes: a substrate temperature obtainer that obtains a substrate temperature of a substrate of a display panel; a power obtainer that obtains an amount of power used by a plurality of segmented regions of the display panel, based on image data displayed on the display panel; a first increased temperature deriver that derives an increased temperature of a panel surface of the display panel based on the amount of power used by the plurality of segmented regions; and a surface temperature estimator that estimates a temperature of the panel surface based on the substrate temperature and the increased temperature.