Component-Area Display Lens Structures for Low-Resistance Wiring
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Solution Overview
Problem
Display apparatuses with integrated functions require a region for these functions to operate effectively while maintaining high transmittance for light and sound, which is challenging due to the need for reduced wiring resistance and process risk.
Innovation Solution
The display apparatus includes first and second display elements in separate areas, pixel circuits in a non-display area connected to the second display elements via connection lines, and organic insulating layers with lens structures to manage light transmission and reduce wiring resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection lines are disposed in the component area to connect pixel circuits to display elements, then electrical connectivity is improved, but transmittance is reduced
Solution Approach 1:
The connection lines are positioned between the first and second organic insulating layers, utilizing the vertical dimension (depth) rather than occupying horizontal space in the component area. This allows electrical connectivity to be maintained without compromising the light transmittance in the component area, as the connection lines are routed through the thickness of the display structure rather than across the display surface.
2Illumination intensity
If lens structures are added to the organic insulating layers, then light transmission is improved, but manufacturing complexity is increased
Solution Approach 1:
The lens structures are formed by controlling the thickness parameter of the organic insulating layers. By varying the thickness of the first and second organic insulating layers to create curved surfaces with specific radii of curvature, the lens functionality is achieved without adding separate structural components. This parameter-based approach simplifies manufacturing compared to adding discrete lens elements.
3Illumination intensity
If the refractive index of the second organic insulating layer is increased, then light focusing is improved, but material selection is restricted
Solution Approach 1:
The patent specifies that the refractive index of the second organic insulating layer should be greater than that of the first organic insulating layer, but provides flexibility in the actual material selection. The second organic insulating layer has a refractive index of 1.7 or greater, allowing for multiple material options (e.g., different polymer compositions) that satisfy the optical requirement while accommodating various manufacturing and cost considerations.
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 achieves reduced wiring resistance, improved process reliability, and high transmittance in the component area, enabling effective operation of integrated functions while maintaining image display capabilities.
Implementation Method 1
an upper surface of the first organic insulating layer includes a first lens structure, where the first lens structure includes a first curved portion disposed between two connection lines adjacent to each other among the connection lines, and an upper surface of the second organic insulating layer includes a second lens structure, where the second lens structure includes a second curved portion overlapping the first curved portion and a portion of the two connection lines adjacent to each other, and a refractive index of the second organic insulating layer is different from a refractive index of the first organic insulating layer
Data Source
AI summary
A display apparatus includes connection lines connecting pixel circuits in the non-display area to display elements in a component area, a first organic insulating layer in the component area, and a second organic insulating layer on the first organic insulating layer, where the connection lines are disposed between the first organic insulating layer and the second organic insulating layer, where an upper surface of the first organic insulating layer includes a first lens structure, where the first lens structure includes a first curved portion disposed between two connection lines adjacent to each other, and an upper surface of the second organic insulating layer includes a second lens structure, where the second lens structure includes a second curved portion overlapping the first curved portion, and a refractive index of the second organic insulating layer is different from a refractive index of the first organic insulating layer.