Light Emitting Panel Encapsulation for Narrow Viewing Angles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light emitting panels face challenges in effectively controlling the viewing angle and reducing cross-color interference among sub-pixels due to the wide viewing angle and lateral propagation of light.
Innovation Solution
The light emitting panel incorporates an encapsulation layer with a first film layer comprising pillars and a first medium, where the refractive index of the pillars differs from the medium, and the volume ratio of the pillars to the medium gradually changes along a specific direction, creating a micro lens effect that converges light to a smaller viewing angle, reducing cross-color interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional encapsulation layer is used, then the manufacturing process is simple, but the viewing angle is wide and cross-color interference occurs
Solution Approach 1:
The encapsulation layer is divided into multiple regions with different pillar volume ratios. The first region (center area) has a first volume ratio of pillars to medium, while the second region (edge area) has a second volume ratio different from the first. This local differentiation allows each region to control light propagation specifically, reducing cross-color interference while maintaining manufacturing feasibility through regional optimization rather than uniform complex structure
Solution Approach 2:
The patent changes the physical parameter of pillar volume ratio in different regions of the encapsulation layer. By adjusting the volume ratio of pillars to medium in the first region versus the second region, the refractive index distribution is modified to control light propagation angles. This parameter change enables reduction of viewing angle and cross-color interference while maintaining a relatively simple manufacturing process based on existing encapsulation techniques
2Object-affected harmful factors
If the viewing angle is reduced to minimize cross-color interference, then cross-color interference is reduced, but luminance in small viewing angle range is not optimized
Solution Approach 1:
Different regions of the encapsulation layer are assigned different pillar volume ratios to perform different optical functions. The first region (center) with its specific volume ratio optimizes for luminance in the small viewing angle range, while the second region (edge) with a different volume ratio optimizes for reducing cross-color interference. This local quality differentiation allows simultaneous optimization of both luminance and cross-color reduction
Solution Approach 2:
The patent introduces curved surface structures through the pillar arrangements in the encapsulation layer. The curved interfaces created by the pillars with different volume ratios guide light propagation through refraction, focusing light in the small viewing angle range to enhance luminance while the overall curved structure geometry helps contain light within specific angular ranges to reduce cross-color interference
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
The solution enhances luminance within a small viewing angle range while significantly reducing cross-color interference and lateral light propagation, improving the overall performance of the light emitting panel.
Implementation Method 1
a refractive index of the pillars is different from that of the first medium, and a volume ratio of the pillars to the first medium gradually increases or decreases along a first direction, so that an equivalent refractive index of the first film layer gradually decreases along the first direction
Data Source
AI summary
A light emitting panela includes: a light emitting substrate including at least one light emitting region and a non-light-emitting region surrounding the light emitting region; and an encapsulation layer arranged on a light exiting side of the light emitting substrate, wherein the encapsulation layer includes a first film layer including a plurality of pillars separated from each other and a first medium arranged in gaps between the pillars; wherein a refractive index of the pillars is different from that of the first medium, and a volume ratio of the pillars to the first medium gradually increases or decreases along a first direction, so that an equivalent refractive index of the first film layer gradually decreases along the first direction, the first direction being a direction from a center of the light emitting region to an edge of the light emitting region.