Scattering Layer for Uniform Luminance in LED Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing LED and OLED display panels suffer from non-uniform luminance due to dark regions between light emitting sub-units, resulting in incomplete light coverage and separation of colors, which limits the light emitting area and display quality.
Innovation Solution
A light emitting device with a scattering layer positioned between the backplane and encapsulating structure, where each light emitting unit corresponds to a scattering unit, allowing for light scattering and mixing of colors from different sub-units, thereby enhancing luminance uniformity and increasing the light emitting area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting sub-units are arranged in a tiling mode with dark regions between them, then the structure is simple and easy to manufacture, but the light emitting area is reduced and luminance uniformity deteriorates
Solution Approach 1:
A scattering layer is introduced as an intermediary component between the light emitting structure and the encapsulating structure. This scattering layer contains scattering units that correspond to the light emitting units, and the scattering units scatter light to fill in the dark regions between sub-units, thereby increasing the effective light emitting area without changing the basic tiling structure of the light emitting sub-units themselves.
2Ease of manufacture
If light emitting sub-units are arranged in a tiling mode with dark regions between them, then the structure is simple and easy to manufacture, but luminance uniformity deteriorates due to non-uniform light emission
Solution Approach 1:
The scattering layer acts as a mediator that receives light from the light emitting units and redistributes it through scattering. The scattering units in the scattering layer correspond to the light emitting units, and they scatter the light to fill in the dark regions, thereby achieving uniform luminance across the entire display panel while maintaining the simple tiling structure of the light emitting sub-units.
Solution Approach 2:
The scattering layer introduces local quality variation by having scattering units that correspond to each light emitting unit. Each scattering unit locally scatters light to compensate for the dark regions adjacent to light emitting sub-units, thereby achieving local luminance uniformity that contributes to overall uniformity across the display panel.
3Device complexity
If light from different sub-pixel units exits respectively without mixing, then the light emitting structure is simple, but color separation occurs and display quality deteriorates
Solution Approach 1:
The scattering layer serves as an intermediary that receives light from different sub-pixel units (red, green, blue) and scatters it so that light from adjacent sub-pixels mixes before exiting the display panel. This scattering process eliminates color separation at the edges of sub-pixels while maintaining the simple structure of having separate light emitting sub-units for each color.
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 achieves improved luminance uniformity and increased light emitting area by scattering light from individual sub-units, eliminating color separation and enhancing display panel resolution and uniformity of emergent light.
Implementation Method 1
the light emanated from individual light emitting sub-units in each of the light emitting unit may be enabled to undergo the light scattering effect of the scattering units before exiting
Data Source
AI summary
Embodiments of the invention provides a light emitting device, which comprises a backplane, an encapsulating structure, and a light emitting structure and a scattering layer disposed between the backplane and the encapsulating structure; the scattering layer is located on the light exiting side of the light emitting structure; the light emitting structure is isolated into a plurality of light emitting units, the scattering layer is isolated into a plurality of scattering units, and the plurality of light emitting units correspond to the plurality of scattering units one to one; wherein each of the light emitting units comprises a first light emitting sub-unit, a second light emitting sub-unit and a third light emitting sub-unit. The embodiments of the invention may be used for a display device and a lighting lamp, thereby increasing the light emitting area and achieving uniform mixed emergent light.