OLED Panel Temperature Compensation via Sensor Array Interpolation
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Solution Overview
Problem
Existing OLED panels face challenges in precise temperature compensation due to the large temperature differences across the panel, as conventional temperature sensors placed on printed circuit boards do not effectively capture localized temperature variations, leading to inadequate compensation.
Innovation Solution
An OLED panel temperature compensation system with a temperature sensor layer comprising multiple temperature sensors arranged in an array, connected to a processing module that uses bilinear interpolation to accurately determine sub-pixel temperatures and generate compensation data signals based on brightness and temperature data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single temperature sensor is placed on the PCB, then the device complexity is reduced, but the measurement precision of temperature is insufficient due to large temperature differences across the OLED panel
Solution Approach 1:
The patent divides the temperature sensing function into multiple segments by arranging temperature sensors in an array across different regions of the OLED panel. This segmentation allows each sensor to measure local temperature accurately, and the processing module then integrates these measurements to determine sub-pixel temperatures, thereby resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The patent transitions from a single-point temperature measurement (one-dimensional) to a multi-point spatial temperature distribution measurement (two-dimensional array). By using bilinear interpolation to calculate temperatures at sub-pixel locations based on the sensor array data, the system achieves precise temperature measurement across the entire panel without requiring a sensor at every location, thus balancing precision and complexity.
2Measurement precision
If temperature sensors are arranged in an array across the OLED panel, then the measurement precision of localized temperature variations is improved, but the device complexity increases
Solution Approach 1:
The temperature sensor array serves multiple functions: it detects temperature at sensor locations, enables calculation of temperatures at intermediate sub-pixel locations through interpolation, and provides comprehensive thermal mapping of the OLED panel. This multi-functionality justifies the increased device complexity by delivering superior localized temperature detection precision across the entire panel.
3Reliability
If conventional temperature compensation using a single PCB sensor is used, then the ease of manufacture is improved, but the reliability of temperature compensation is insufficient due to inadequate temperature detection
Solution Approach 1:
The patent implements a feedback mechanism where the processing module continuously receives temperature data from the sensor array, calculates sub-pixel temperatures using bilinear interpolation, and uses this information to generate compensation data signals. This feedback loop ensures reliable temperature compensation by constantly adjusting for actual panel temperature conditions, outweighing the increased manufacturing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system enables precise and effective temperature compensation of OLED panels, improving display accuracy and enhancing the overall performance by accounting for localized temperature variations.
Implementation Method 1
the temperature sensor being configured to detect a temperature of a location located therein and transmitting the temperature to the processing module
Implementation Method 2
the processing module receiving the temperatures at the locations of four temperature sensors adjacent to the to-be-tested sub-pixel, and calculating the temperature of the to-be-tested sub-pixel by bilinear interpolation
Implementation Method 3
When a current flows through the OLED, the OLED emits light and the luminance is determined by the current flowing through the OLED
Implementation Method 4
due to the light emission properties, cause localized heat generation
Data Source
AI summary
The invention provides an OLED panel temperature compensation system and method. The system comprises an OLED panel and a processing module connected to the OLED panel, the OLED panel is disposed with a temperature sensor layer of a plurality of temperature sensors on one side or inside; when performing temperature compensation, the temperature sensor detects the temperature of the location and transmits to the processing module, the processing module receives and processes the initial data signals of the plurality of sub-pixels to obtain the to-be-displayed brightness of the plurality of sub-pixels, and receives and processes the temperatures from the plurality of temperature sensors to obtain the temperatures of the plurality of sub-pixels, and generates and outputs compensation data signals corresponding to the plurality of sub-pixels according to the to-be-displayed brightness and temperature of the plurality of sub-pixels. The OLED panel is thus accurately and effectively compensated for temperature.