Low-Potential Voltage Line Sensing for Display Uniformity
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Solution Overview
Problem
Existing display devices face challenges in maintaining uniform display quality across the panel due to resistance deviations, which can lead to luminance deviations and gradient issues in images.
Innovation Solution
A display device and method that sense the current or voltage flowing through a low-potential voltage line, compensating the data signal based on the sensed values to equalize display quality across the panel and minimize the impact of resistance deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a low-potential voltage line is used to deliver voltage to subpixels, then power consumption is reduced and display quality is improved, but resistance deviations cause luminance deviations and gradient issues across the panel
Solution Approach 1:
The patent applies preliminary action by performing sensing operations before actual display operations. The sensing circuit measures the low-potential voltage line characteristics in advance, and compensation values are calculated and stored before the display panel operates. This allows the system to pre-compensate for resistance deviations, ensuring uniform luminance across the panel without affecting real-time display performance.
Solution Approach 2:
The patent implements feedback by using a sensing circuit to continuously monitor the low-potential voltage line and feed back the measured values to a compensation circuit. The compensation circuit adjusts the data signals based on the sensed voltage deviations, creating a closed-loop system that automatically corrects for resistance variations. This feedback mechanism ensures that luminance deviations caused by resistance differences are dynamically compensated, maintaining display quality uniformity.
2Measurement precision
If sensing operations are performed on the low-potential voltage line, then resistance deviations can be compensated, but additional circuit components and operational complexity are introduced
Solution Approach 1:
The patent applies universality by designing the sensing circuit to share the low-potential voltage line with the display subpixels. The same voltage line serves dual purposes: delivering power to the subpixels during normal operation and providing sensing measurements during compensation operations. This multi-functionality reduces the need for separate dedicated sensing lines, thereby minimizing additional circuit complexity while maintaining accurate voltage measurement capabilities.
Solution Approach 2:
The patent implements self-service by using the display panel's own low-potential voltage line as the sensing path. Instead of requiring external or separate sensing circuits that would add complexity, the system utilizes the existing voltage delivery infrastructure for both power supply and measurement purposes. The sensing operation leverages the inherent electrical characteristics of the voltage line itself, allowing the display system to perform self-diagnosis and self-compensation without additional external components.
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 compensates for changes in low-potential voltage due to current resistance variations, ensuring uniform display quality and minimizing luminance deviations across the display panel.
Implementation Method 1
sensing the low-potential voltage line connected to the first subpixel and the second subpixel, and compensating for a data signal to be supplied to the first subpixel based on a sensed value acquired through the low-potential voltage line
Data Source
AI summary
The present disclosure provides a display device including a first subpixel configured to emit light and a second subpixel; a high-potential voltage line connected to the first subpixel and the second subpixel to deliver a high-potential voltage; a low-potential voltage line connected to the first subpixel and the second subpixel configured to deliver a low-potential voltage; and a circuit connected to the low-potential voltage line and configured to sense a value corresponding to the low-potential voltage line during operation of the second subpixel and compensate for a data signal to be supplied to the first subpixel based on the value.