μLED Display Temperature Compensation With Down-Sampled Pixel Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
μLED display devices are susceptible to significant color differences due to inconsistent temperature characteristics of LEDs, affecting the user's visual experience in high or low temperature environments.
Innovation Solution
A display device with a temperature compensation circuit and sensors that dynamically adjust drive values based on temperature readings, using a lookup table and interpolation to compensate for temperature variations, reducing the area of the driving circuit and updating compensation values per frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If temperature compensation is performed for all pixel structures, then color consistency is improved, but driving circuit area increases
Solution Approach 1:
The pixel array is divided into multiple areas, each with its own temperature sensor and down-sampling position. Instead of uniformly compensating all pixels, only representative pixels at down-sampling positions are directly compensated, while other pixels use interpolated temperature data. This segmentation reduces the number of sensors and compensation operations needed.
Solution Approach 2:
Different regions of the display panel are treated differently based on their temperature characteristics. Each area has localized temperature compensation applied at down-sampling positions, with interpolation used for intermediate regions. This allows precise compensation where needed while reducing overall circuit complexity.
2Measurement precision
If temperature sensors are placed at every pixel position, then temperature measurement precision is improved, but device complexity increases
Solution Approach 1:
Temperature sensors are strategically placed only at down-sampling positions rather than at every pixel location. The patent divides the pixel array into areas with sensors positioned at specific sampling points, reducing the total number of sensors while maintaining adequate temperature monitoring coverage through spatial interpolation.
Solution Approach 2:
Temperature interpolation acts as an intermediary between the discrete temperature sensor readings and the continuous temperature compensation needed across the entire display. The interpolation algorithm estimates temperatures at unsampled positions based on readings from down-sampling positions, eliminating the need for physical sensors at every pixel location.
3Manufacturing precision
If dynamic temperature compensation is performed for every frame, then visual performance is improved, but processing time increases
Solution Approach 1:
The compensation process is segmented into frame-based operations where only down-sampling position pixels require full lookup table queries and compensation calculations. Other pixels utilize interpolated temperature data and simplified compensation, reducing per-frame processing time while maintaining visual quality.
Solution Approach 2:
Temperature interpolation is performed in advance for all pixel positions based on sensor readings from down-sampling positions. This preliminary interpolation prepares temperature data for subsequent compensation operations, allowing faster processing during actual frame rendering without sacrificing accuracy.
Data Source
AI summary
The present disclosure provides a display device and a temperature compensation method. This method includes: obtaining a temperature value through a temperature sensor which corresponds to an area of a pixel array in a display panel, in which the area contains multiple pixel structures; setting a down-sampling position in the aforementioned area and receiving a subpixel value corresponding to the down-sampling position; obtaining a compensation temperature value at the down-sampling position based on the temperature value; querying a lookup table according to the subpixel value and the compensation temperature value to obtain a compensation value; and generating a drive value based on the subpixel value and compensation value to drive the pixel structure at the down-sampling position, and updating the lookup table based on the drive value.