Display Panel Light-Blocking Layout for Sub-Pixel Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The interference of light emitted by adjacent sub-pixels in display panels, such as OLED and Micro-LED panels, affects the display effect due to increased thin-film transistor leakage and luminance or chromaticity drift.
Innovation Solution
A display panel design incorporating a light-blocking layer that overlaps with the sidewalls of openings in the driving layer, which includes thin-film transistors, to block light interference between sub-pixels, using materials like light-absorbing and reflecting layers to minimize light irradiation onto adjacent sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light-emitting elements are arranged closely to increase display resolution, then display quality is improved, but light interference between adjacent sub-pixels increases causing thin-film transistor leakage and luminance drift
Solution Approach 1:
A light-blocking layer is introduced as an intermediary component between adjacent light-emitting elements. This layer contains light-blocking portions that extend into the light-emitting area to block stray light from reaching adjacent sub-pixels, while maintaining the high-resolution arrangement. The light-blocking layer acts as a mediator that prevents harmful light interference without requiring increased spacing between sub-pixels.
Solution Approach 2:
The light-blocking layer implements local quality by having light-blocking portions strategically positioned only in specific regions where light interference occurs. The light-blocking portions extend into the light-emitting area at controlled distances (5-20 micrometers) from the light-emitting element, creating localized light-blocking zones that prevent interference with adjacent sub-pixels while preserving overall display brightness and resolution.
2Object-affected harmful factors
If light-blocking layer extends further into light-emitting area to block more interference light, then light interference is reduced, but display brightness and viewing area are decreased
Solution Approach 1:
The invention optimizes the light-blocking effect by controlling the extension distance of light-blocking portions into the light-emitting area. By adjusting this parameter to be between 5-20 micrometers, the patent achieves effective light interference blocking while minimizing the impact on display brightness. This parameter optimization allows the light-blocking layer to block stray light effectively without significantly reducing the light-emitting area or overall display luminance.
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
Reduces the risk of luminance and chromaticity drift by minimizing light interference between sub-pixels, ensuring accurate driving current and improved display quality.
Implementation Method 1
a light-blocking layer, the light-blocking layer including a light-blocking portion extending towards the light-emitting element in the light-emitting area
Implementation Method 2
the light-blocking layer with light-absorbing or reflecting materials to prevent light from one sub-pixel from irradiating adjacent sub-pixels
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate, a driving layer located on a side of the substrate, light-emitting elements and a light-blocking layer; the driving layer includes thin-film transistors, a first functional layer and a second functional layer, the first functional layer includes a first opening, the second functional layer includes a second opening, the first opening overlaps with the second opening in a first direction, and a size of the first opening is different from a size of the second opening in a second direction. The light-emitting element and the driving layer are located on a same side of the substrate, and the light-emitting element is electrically connected to at least part of the thin-film transistors of the driving layer. The light-blocking layer at least partially overlaps with a sidewall of the first opening in the second direction.