Display Device Substrate Depression Pattern for Light Efficiency
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Solution Overview
Problem
Current display devices have complex stacked structures that hinder light emission efficiency and display quality, particularly in terms of view angle, due to the multi-layered configuration which affects the transmission and reflection of light.
Innovation Solution
A simplified stacked structure for display devices is introduced, featuring a substrate with a depression pattern filled by an overcoat or cover layer, which extends from the display area to the peripheral area, and includes touch insulating layers and a color filter, enhancing light transmission and reflection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a multi-layered stacked structure is used in display devices, then structural stability and functionality are improved, but light emission efficiency and display quality deteriorate
Solution Approach 1:
The patent removes the black matrix layer from the display device structure. This extraction eliminates the harmful light-blocking function of the black matrix while maintaining the necessary structural stability through alternative designs, thereby improving light emission efficiency and display quality without sacrificing structural integrity
Solution Approach 2:
The patent integrates multiple functions into fewer layers. The color filter layer and touch insulating layer are designed to serve both optical functions (color filtering and light transmission) and structural functions (layer stability and alignment), reducing the total number of layers while maintaining structural stability and improving light emission
2Stability of the object's composition
If a multi-layered stacked structure is used in display devices, then structural stability and functionality are improved, but display quality and view angle deteriorate
Solution Approach 1:
By removing the black matrix layer, the patent eliminates a source of light interference and viewing angle limitations. This extraction simplifies the optical path and reduces light scattering at layer interfaces, thereby improving display quality and view angle while maintaining structural stability through the remaining optimized layers
Solution Approach 2:
The patent employs composite material designs in the remaining layers, particularly in the color filter and touch insulating layers, where multiple materials are combined to achieve both structural stability and superior optical properties including enhanced display quality and wider view angles
3Adaptability or versatility
If a multi-layered stacked structure is used in display devices, then functionality is improved, but light transmission efficiency deteriorates
Solution Approach 1:
The removal of the black matrix layer directly improves light transmission efficiency by eliminating a layer that absorbs and blocks light. This extraction reduces energy loss while maintaining essential functionalities through the optimized configuration of the remaining layers
Solution Approach 2:
The patent optimizes the vertical stacking arrangement of layers, changing the dimensional configuration to minimize light path interference. By reorganizing layers in the thickness direction and optimizing their optical properties, the patent maintains functionality while improving light transmission efficiency and reducing energy loss
Data Source
AI summary
Some embodiments provide a display device including a substrate having an opening area, a peripheral area surrounding the opening area, and a display area surrounding the peripheral area, a transistor and a light emitting element on the substrate, an encapsulation layer on the light emitting element, a first touch insulating layer on the encapsulation layer, an overcoat layer on the first touch insulating layer, and defining a first opening, and a cover layer filling the first opening, wherein at least one of the overcoat layer and the cover layer extends from the display area to the peripheral area, and wherein the substrate includes a depression pattern that is filled by the overcoat layer or the cover layer.