Display Panel Support Pillars for Uniform Light Emission
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Solution Overview
Problem
The removal of the planarization layer from display panels to achieve thinner and lower-cost designs results in uneven surfaces, leading to insufficient support for the display panel, causing light leakage and non-uniform light emission due to misalignment of support pillars with signal wires, which affects the thickness of the liquid crystal layer and optical path differences.
Innovation Solution
A display panel design featuring primary and auxiliary support pillars with specific positioning and dimensions to ensure proper alignment and support, including primary support pillars that abut against a flat surface between scan lines and data lines, and auxiliary support pillars that only engage when external forces are applied, minimizing shading area and maximizing light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the planarization layer is removed to reduce cost and thickness, then the display panel becomes thinner and lower cost, but the surface becomes uneven causing misalignment between support pillars and signal wires
Solution Approach 1:
The support structure is segmented into multiple support pillars distributed across the display panel. Each support pillar independently supports the color film substrate at specific locations, allowing the system to maintain overall support function even without a planarization layer. The segmentation enables localized adaptation to the uneven surface created by removing the planarization layer.
Solution Approach 2:
Different regions of the display panel are provided with support pillars according to local requirements. The support pillars are strategically positioned to align with convex areas formed by signal wires in specific regions, while other regions may have different support configurations. This local quality approach ensures optimal support where needed without requiring global planarization.
2Manufacturing precision
If support pillars are positioned to align with convex areas of signal wires, then alignment is improved, but the support area is limited and insufficient support occurs under external force
Solution Approach 1:
The support function is divided among multiple support pillars rather than relying on a single large support structure. This segmentation allows the system to distribute support forces across multiple contact points, improving overall support strength while maintaining alignment with convex areas.
Solution Approach 2:
The support pillar configuration allows for dynamic adaptation to external forces. When external force is applied, the color film substrate can deform slightly, allowing support pillars to engage with convex areas as needed. The system transitions from a static alignment requirement to a dynamic support mechanism that adapts to loading conditions.
3Object-affected harmful factors
If the black matrix is used to shade the support pillar area, then light leakage from support pillars is prevented, but the light-emitting area of the display panel is reduced
Solution Approach 1:
The shading function is extracted from the black matrix and assigned to a separate shading layer. This allows the black matrix to be optimized for its primary function of shading signal wires and other non-light-emitting areas, while the shading layer specifically addresses light leakage from support pillars. This extraction enables more efficient use of the light-emitting area.
Solution Approach 2:
A shading layer is introduced as an intermediary element between the support pillars and the liquid crystal layer. This intermediate layer specifically addresses light leakage from support pillars without requiring the black matrix to expand into light-emitting areas. The shading layer acts as a mediator that solves the light leakage problem while preserving the light-emitting area.
Data Source
AI summary
A display panel and a display apparatus are provided. The display panel includes an array substrate; a color film substrate; support pillars; pixel sub-units; and data lines. The support pillars include a primary support pillar and auxiliary support pillars. The primary support pillar and the auxiliary support pillars each include a first support pillar. The pixel sub-units are formed by crossing the scan lines and the data lines. The pixel sub-units each include a thin film transistor and a pixel electrode. The thin film transistor includes a gate, a source and a drain. The scan line is electrically connected to the gate. The data line is electrically connected to the source. The pixel electrode is electrically connected to the drain. The present disclosure can enhance supporting capacity of the display panel.