Display Panel White Insulation Layer Reflective Light Shielding
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Solution Overview
Problem
Current light-emitting diode array display panels face challenges in reducing the width of multi-layer light shielding structures between sub-pixels, which hinders the minimization and improvement of resolution due to the degradation of light conversion efficiency caused by thick black matrix layers.
Innovation Solution
The display panel design incorporates a reflective layer between the first and second spacer layers, or adjacent to them, and a white insulation layer with light-reflecting photoresist material, allowing for reduced width of the light shielding structure along the sub-pixel direction, thereby increasing pixel density and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If thicker black matrix layers are used to reduce color mixing between sub-pixels, then color isolation is improved, but light conversion efficiency deteriorates
Solution Approach 1:
The patent converts the harmful light that would otherwise be absorbed by thick black matrix layers into useful reflected light by positioning a reflective layer beneath the color conversion layer. This reflected light is redirected to exit through the intended sub-pixel, thereby maintaining color isolation while recovering previously lost light energy and improving overall light conversion efficiency
Solution Approach 2:
The reflective layer acts as an intermediary element between the color conversion layer and the substrate. It mediates the interaction between emitted light and the substrate by reflecting light that would otherwise be trapped, thereby resolving the contradiction between needing thick black matrix for color isolation and maintaining light efficiency
2Manufacturing precision
If width of multiple-layer light shielding structures between sub-pixels is reduced, then resolution is improved, but color mixing between sub-pixels worsens
Solution Approach 1:
By reducing the width of light shielding structures, the patent allows more light to be reflected by the reflective layer and redirected through the color conversion layer. This converts what would be potential color mixing into useful light output, enabling narrower shielding structures while maintaining color isolation through the reflective mechanism
Solution Approach 2:
The patent addresses the two-dimensional constraint of light shielding structure width by introducing a vertical reflective dimension. The reflective layer operates in the vertical dimension beneath the color conversion layer, providing color isolation functionality that compensates for reduced horizontal shielding, thereby enabling higher resolution
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
This configuration enhances light emitting efficiency and reduces the interval between sub-pixels, leading to improved resolution and light emission efficiency by minimizing the width of the light shielding structure and optimizing light distribution.
Implementation Method 1
The white insulation layer includes a light-reflecting photoresist material
Data Source
AI summary
A display panel includes a first substrate, a second substrate, a light-emitting diode, a white insulation layer, and a first spacer layer. The first substrate has a filter layer and at least one black matrix. The second substrate is opposite to the first substrate. The light-emitting diode is disposed on the second substrate. The white insulation layer is located on the first substrate and protrudes toward the second substrate. The white insulation layer is overlapped with the filter layer and the black matrix along a first direction substantially perpendicular to the first substrate. The first spacer layer is disposed between the second substrate and the white insulation layer, and the first spacer layer is overlapped with the black matrix along the first direction.