Light-Emitting Panel Edge Layout for Uniform Brightness
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Solution Overview
Problem
Existing display devices suffer from insufficient edge brightness, leading to non-uniform light output and impaired display quality.
Innovation Solution
The distance between first light-emitting elements near the edge of the driving substrate is set to be less than half the minimum distance between any two adjacent elements, ensuring uniform brightness across the light-emitting panel by adjusting the position and reflection structure of light-emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light-emitting elements are positioned with equal spacing across the driving substrate, then manufacturing is simplified, but edge brightness becomes insufficient and light output uniformity deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the positioning of light-emitting elements based on their location. Elements near the edge (first light-emitting elements) are positioned at a distance from the edge less than half the minimum spacing between adjacent elements, while other elements follow regular spacing. This localized adjustment ensures sufficient edge brightness without compromising overall manufacturing simplicity.
2Illumination intensity
If light-emitting elements are positioned closer to the edge to improve edge brightness, then illumination uniformity improves, but the risk of light leakage and color mixing increases
Solution Approach 1:
The patent changes the positional parameter of light-emitting elements near the edge, setting their distance from the edge to be less than half the minimum spacing between adjacent elements. This parameter adjustment optimizes edge brightness while the patent simultaneously introduces partition walls to prevent light leakage and color mixing, thus resolving the contradiction.
Solution Approach 2:
The patent introduces partition walls as intermediary structures between light-emitting elements. These partition walls act as mediators that block light from leaking between adjacent elements, preventing color mixing while allowing the elements to be positioned closer to the edge for improved brightness uniformity.
3Illumination intensity
If light-emitting elements are positioned closer together to reduce brightness differences, then light output uniformity improves, but device complexity increases due to additional positioning requirements
Solution Approach 1:
The patent applies local quality by implementing differentiated positioning only for light-emitting elements near the edge of the driving substrate. The distance from the edge for these first light-emitting elements is set to less than half the minimum spacing, while other elements maintain regular spacing. This localized approach improves brightness uniformity without significantly increasing overall device complexity.
Data Source
AI summary
Provided are a light-emitting panel, a display device, and a backlight module. The light-emitting panel includes a driving substrate and multiple light-emitting elements located on a side of the driving substrate. The multiple light-emitting elements include first light-emitting elements on a side of the driving substrate close to an edge of the driving substrate. The minimum distance between the first light-emitting elements and the edge of the driving substrate is L1, and the minimum distance between two adjacent light-emitting elements is L2, where 0<L1≤L2/2.