Pixel Group Lighting Sequence for Stable Mini LED Display Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Self-emissive display technologies using mini LEDs and micro LEDs experience brightness flicker due to different current densities for different color light-emitting diodes, causing visual fatigue over prolonged use.
Innovation Solution
A display apparatus with pixel circuits arranged in groups, where light-emitting diodes of different colors are illuminated sequentially in staggered patterns across adjacent pixel groups, maintaining consistent brightness and reducing flicker without increasing PWM frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If color rotation lighting is adopted to reduce maximum current load, then power consumption is reduced, but brightness flicker occurs due to different current densities for different colors
Solution Approach 1:
The display panel is divided into multiple pixel groups, and within each pixel group, different colored sub-pixels are further segmented and driven independently with different current densities. This allows each color to operate at its optimal current density while maintaining overall brightness stability through coordinated control of multiple segments.
Solution Approach 2:
Different current densities are applied to different colored sub-pixels (red, green, blue) based on their specific electro-optical conversion requirements. Each color receives a customized current density tailored to its characteristics, ensuring optimal brightness output without causing flicker.
2Power
If different current densities are used for different color light-emitting diodes to achieve better electro-optical conversion efficiency, then light emission efficiency is improved, but instantaneous brightness varies causing flicker
Solution Approach 1:
The driving circuit dynamically adjusts the current density applied to each colored sub-pixel based on real-time brightness requirements and color-specific characteristics. This dynamic control allows the system to maintain optimal electro-optical conversion efficiency for each color while compensating for brightness variations to eliminate flicker.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor the actual brightness output of different colored sub-pixels and adjust the current density accordingly. This closed-loop control ensures that each color operates at its optimal efficiency point while maintaining consistent instantaneous brightness across all colors.
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
Enhances brightness stability over time, reducing visual fatigue by ensuring consistent average instantaneous brightness across the display panel, thereby improving viewer comfort.
Implementation Method 1
each pixel circuit has a first color light-emitting diode, a second color light-emitting diode, and a third color light-emitting diode
Data Source
AI summary
A display apparatus is provided. The display apparatus includes multiple pixel circuits, a timing controller, and multiple display driving circuits. The pixel circuits are divided into multiple pixel groups, and each has a first color light-emitting diode, a second color light-emitting diode, and a third color light-emitting diode. The timing controller provides multiple display data. The display driving circuit, according to the corresponding display data, drives the pixel circuit in the corresponding pixel group to sequentially illuminate one of the first color light-emitting diodes, the second color light-emitting diodes, and the third color light-emitting diodes in multiple illumination periods. During each illumination period, the pixel groups alternately illuminate a part of the first color light-emitting diodes, a part of the second color light-emitting diodes, and a part of the third color light-emitting diodes.