Display Device Optical Layer Transmittance Bank Structure
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Solution Overview
Problem
Current display devices face limitations in increasing transmittance while maintaining effective light emission and structural integrity, particularly in the design of emission, line, and transmission areas.
Innovation Solution
The display device incorporates a specific structure with an emission area containing light emitting elements, a line area with signal lines, a transmission area at the periphery, and an optical layer surrounded by banks, where the banks include overcoat layers and the optical layer has a refractive index between 1.1 to 1.3, enhancing transmittance and minimizing step differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the transmission area is increased to improve transmittance, then light transmittance is improved, but the structural integrity and light emission efficiency may deteriorate
Solution Approach 1:
The patent applies local quality by giving different regions of the display device different characteristics: the emission area contains light-emitting elements with specific layers for light generation, the line area has signal lines for electrical connections, and the transmission area is optimized for light passage. The bank structure provides localized support at boundaries while maintaining transparency in the transmission area, thus improving overall light transmittance without compromising structural integrity.
Solution Approach 2:
The display device is segmented into distinct functional areas: emission area, line area, and transmission area. This segmentation allows each region to be optimized independently - the transmission area can be designed with higher transmittance characteristics while the emission area maintains light-emitting functionality, and the line area provides structural support and electrical connectivity. The bank structure further segments the device by providing boundary definition and mechanical support.
2Strength
If the bank thickness is increased to maintain structural support, then structural integrity is improved, but light transmittance deteriorates
Solution Approach 1:
The bank structure is implemented as a thin film or shell that provides necessary structural support while maintaining light transmittance. The bank includes a bank body and an overcoat layer that can be optimized for both mechanical strength and optical transparency. This thin-film approach allows the bank to fulfill its structural role without significantly blocking light in the transmission area.
Solution Approach 2:
The bank structure uses composite materials that combine mechanical strength with optical transparency. The bank body and overcoat layer are designed as a composite structure where materials are selected to provide both structural support and light transmittance properties, resolving the contradiction between strength and transparency.
3Illumination intensity
If the optical layer is added to improve transmittance, then light transmittance is improved, but device complexity increases
Solution Approach 1:
The bank structure serves multiple functions: it provides structural support, defines the boundaries of different areas (emission, line, and transmission areas), and when combined with the optical layer, enhances light transmittance. The overcoat layer on the bank provides both protective and optical functions. This multi-functionality reduces the need for separate dedicated components, thereby managing device complexity while achieving improved transmittance.
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 improves light transmittance and maintains structural integrity, allowing for a transparent display device with enhanced light emission efficiency and adaptable specifications.
Implementation Method 1
an optical layer disposed in a space surrounded by the bank in the transmission area... The optical layer may have a refractive index in a range of about 1.1 to about 1.3... enhancing transmittance
Data Source
AI summary
A display device includes an emission area including light emitting elements; a line area including signal lines electrically connected to the light emitting elements; a transmission area disposed at a periphery of the emission area and the line area; a bank disposed in the emission area and the line area; and an optical layer disposed in a space surrounded by the bank in the transmission area.