Display Panel Image Compensation Using Temperature-Specific Lookup Tables
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices experience output deviations in sensing data due to variations in transistor threshold voltage, mobility, and light emitting element capacitance, leading to inconsistent image quality across different ICs or channels.
Innovation Solution
A display device with a data driver including a sensing part, a temperature sensor, and a timing controller that selects a correction lookup table based on current temperature to correct output deviations in sensing data, compensating for input image data using sensing data and correction values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sensing data is collected to compensate for pixel characteristics, then display quality is improved, but output deviation between ICs or channels occurs
Solution Approach 1:
The patent applies parameter changes by introducing temperature as a new parameter that affects sensing data. Multiple correction lookup tables are created for different temperature conditions, and the system dynamically selects and applies the appropriate correction values based on the current temperature. This resolves the output deviation issue by accounting for temperature-induced variations in sensing characteristics.
Solution Approach 2:
The patent implements feedback by using temperature sensing to dynamically adjust the correction applied to sensing data. The temperature sensor continuously monitors the operating temperature, and the timing controller uses this information to select the appropriate correction lookup table, creating a closed-loop system that adapts to changing conditions and maintains measurement precision.
2Measurement precision
If correction lookup tables for multiple temperatures are created, then temperature-related output deviation is corrected, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values in lookup tables during manufacturing or system initialization. These lookup tables are prepared in advance for various temperature conditions, so that during actual operation, the system simply needs to select and apply the pre-computed corrections based on current temperature, avoiding the need for complex real-time calculations.
Solution Approach 2:
The patent uses copying by creating multiple copies of correction data in separate lookup tables, each corresponding to a specific temperature range. Instead of using a single complex correction algorithm, the system copies the appropriate correction values from pre-prepared tables based on temperature, simplifying the runtime operation while maintaining high compensation accuracy.
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
The solution effectively corrects output deviations in sensing data by using temperature-specific correction lookup tables, ensuring consistent image quality across different channels and temperatures.
Implementation Method 1
a temperature sensor configured to sense a current temperature
Implementation Method 2
correct an output deviation of the sensing part based on the correction lookup table for the current temperature
Data Source
AI summary
A display device includes: a display panel including a data line, a sensing line, and a pixel electrically connected to the data line and the sensing line; a data driver including a sensing part, and for applying a data voltage to the data line, wherein the sensing part is for receiving a signal of the sensing line and to output sensing data; a temperature sensor sensing a current temperature; and a timing controller for selecting a correction lookup table for the current temperature from among correction lookup tables for temperatures, correcting an output deviation of the sensing part based on the correction lookup table for the current temperature, and compensating for input image data based on the sensing data.