Display Panel Luminance Compensation Using Mutual Capacitance
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Solution Overview
Problem
Display panels experience uneven luminance due to signal voltage deviations caused by line impedance, leading to poor compensation effects in existing luminance compensation methods, particularly when applied to products within the same batch.
Innovation Solution
A luminance compensation method utilizing first and second touch electrodes to determine actual luminance values through mutual capacitances, generating compensation instructions for targeted luminance adjustments based on these values and target luminance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sampling compensation is performed in the same batch of products, then manufacturing efficiency is improved, but luminance compensation precision deteriorates due to product differences
Solution Approach 1:
The patent divides the display panel into multiple sensing regions, each with its own touch electrode pair. This segmentation allows individual measurement and compensation for each region, capturing local luminance characteristics and enabling precise compensation that accounts for product-specific variations while maintaining manufacturing efficiency.
Solution Approach 2:
The patent implements local quality by creating correspondence relationships specific to each sensing region rather than applying a uniform compensation method across the entire panel. Each region's luminance characteristics are measured and compensated independently, ensuring that local variations in luminance are addressed with region-specific compensation parameters.
2Stability of the object's composition
If line impedance compensation is applied to all pixels, then luminance uniformity is improved, but device complexity increases due to additional compensation circuits
Solution Approach 1:
The patent makes the touch sensing electrodes serve multiple functions: they perform both touch detection and luminance measurement. By utilizing the existing touch electrode structure for luminance sensing, the patent avoids adding separate compensation circuits, thereby maintaining luminance uniformity without increasing device complexity.
Solution Approach 2:
The display panel uses its own touch sensing system to perform luminance measurement and compensation. The touch electrodes and control circuits serve dual purposes, enabling the panel to self-diagnose and self-compensate for luminance variations without requiring external compensation devices or additional circuitry.
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
Improves luminance uniformity by providing targeted compensation for individual display panels, addressing differences between products in the same batch and enhancing display quality.
Implementation Method 1
acquiring first mutual capacitances of the touch sensing regions transmitted by a touch chip, the first mutual capacitance being a coupling capacitance of a single first touch electrode and a single second touch electrode
Data Source
AI summary
The present application discloses a luminance compensation method of a display panel, a luminance compensation apparatus, a luminance compensation device and a storage medium. The method includes: acquiring first correspondence relationships respectively corresponding to touch sensing regions, wherein the first correspondence relationship is a correspondence relationship of light-emitting luminance and mutual capacitances; acquiring first mutual capacitances of the touch sensing regions transmitted by a touch chip; determining actual luminance values of light-emitting pixel regions respectively corresponding to the touch sensing regions according to the first mutual capacitances and the first correspondence relationships of the touch sensing regions, wherein the light-emitting pixel region comprises at least one light-emitting pixel; generating a compensation instruction according to the actual luminance values of the light-emitting pixel regions and target luminance values, thereby causing a driving chip to make luminance compensation for the light-emitting pixel regions according to the compensation instruction.