Display Apparatus Dummy Light-Emitting Element Diffraction Structure
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Solution Overview
Problem
Existing display apparatuses face challenges in reducing external light reflection and maintaining brightness, particularly due to the limitations in the design of the bank layer and light-blocking layer, which affect the efficiency of light emission and visibility.
Innovation Solution
The display apparatus incorporates a dummy light-emitting element and a diffraction structure within the input sensing layer, where the width of the opening in the light-blocking layer is reduced, and the diffraction structure includes holes through insulating layers with varying refractive indices to enhance light diffraction and reduce external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the width of the opening in the light-blocking layer is reduced, then external light reflection is minimized, but brightness is compromised
Solution Approach 1:
The patent introduces a dummy light-emitting element that emits light of the same color as the main light-emitting element. This converts the harmful effect of external light reflection into a beneficial effect by using the dummy element's light to fill in the brightness loss caused by reducing the opening width, thereby minimizing reflection while maintaining brightness
Solution Approach 2:
The patent changes the optical parameters by introducing a diffraction structure with holes through insulating layers having varying refractive indices. This diffraction structure modifies the light path and enhances light emission efficiency, allowing the opening width to be reduced while maintaining brightness through improved light utilization
2Object-affected harmful factors
If the opening width is reduced to minimize reflection, then visibility is improved in bright environments, but light emission efficiency decreases
Solution Approach 1:
The dummy light-emitting element converts the limitation of reduced opening width into an opportunity to enhance light emission efficiency. By emitting light of the same color and using diffraction structures, it compensates for the reduced light output from the main element, thereby improving overall light emission efficiency while maintaining the reduced opening configuration that minimizes reflection
Solution Approach 2:
The patent employs a composite structure involving multiple insulating layers with different refractive indices and a diffraction structure. This composite configuration enhances light emission efficiency by manipulating light paths through refraction and diffraction, allowing the system to maintain high efficiency even with reduced opening width
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 secures improved brightness while minimizing external light reflection, thereby enhancing the display's visibility and efficiency.
Implementation Method 1
a diffraction structure in which at least one hole is defined through the at least one insulating layer
Implementation Method 2
the at least one insulating layer includes a first sub-insulating layer and a second sub-insulating layer on the first sub-insulating layer, and a refractive index of the second sub-insulating layer may be less than a refractive index of the first sub-insulating layer
Data Source
AI summary
A display apparatus includes a substrate, a first light-emitting element disposed over the substrate to emit light, a first dummy light-emitting element disposed over the substrate to emit light of a same color as a color of the light emitted from the first light-emitting element, an input sensing layer disposed on the first light-emitting element and the first dummy light-emitting element, and a light-blocking layer disposed on the input sensing layer, where an opening is defined through the light-blocking layer to overlap the first light-emitting element, and the input sensing layer includes a diffraction structure disposed to overlap the first dummy light-emitting element.