Flexible Display Panels With High Refractive Index Optical Layer
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Solution Overview
Problem
Existing display devices face challenges in increasing size while minimizing thickness and weight, suppressing display unevenness and luminance unevenness, and enabling image display on curved surfaces with high browsability.
Innovation Solution
A display device comprising multiple flexible display panels with a light-transmitting layer having a refractive index higher than air, positioned between the panels to reduce reflection and air entry, allowing for a seamless display surface and improved light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display panels are stacked to increase display size, then the display area is increased, but the thickness and weight increase
Solution Approach 1:
The patent uses flexible substrates and thin-film structures in the display panels, allowing multiple panels to be stacked with minimal thickness addition. The flexible nature enables close positioning of panels while maintaining structural integrity, reducing overall thickness compared to rigid panel constructions.
Solution Approach 2:
The patent combines multiple display panels into a stacked configuration where they share common structural elements and bonding interfaces. This merging approach allows the panels to function as an integrated unit, increasing display area while minimizing the cumulative thickness through shared support structures.
2Area of stationary object
If multiple display panels are stacked to increase display size, then the display area is increased, but the weight increases
Solution Approach 1:
The flexible substrate and thin-film construction used in each panel reduces the mass of individual panels. When multiple such lightweight panels are stacked, the cumulative weight increase is minimized compared to traditional rigid panel constructions, enabling larger display areas with acceptable weight constraints.
Solution Approach 2:
The patent employs composite material structures in the display panels, combining lightweight materials with functional layers. This composite approach maintains structural strength while reducing overall panel weight, allowing multiple panels to be stacked without excessive weight accumulation.
3Illumination intensity
If a light-transmitting layer with high refractive index is added between panels, then light extraction efficiency is improved, but device complexity increases
Solution Approach 1:
The light-transmitting layer with high refractive index serves as an optical intermediary between adjacent display panels. It mediates light propagation by reducing reflection at interfaces and enhancing light extraction efficiency, while being integrated into the existing panel structure to minimize added complexity.
Solution Approach 2:
The patent changes the refractive index parameter of the intermediate layer to optimize optical performance. By selecting materials with specific refractive index values, the system achieves improved light extraction efficiency without fundamentally altering the device architecture, thus managing complexity.
4Adaptability or versatility
If display panels are made flexible to enable curved surface display, then adaptability is improved, but manufacturing precision becomes more difficult to maintain
Solution Approach 1:
The use of flexible substrates and thin-film structures enables the display panels to be bent and conform to curved surfaces. This flexibility is achieved through careful selection of flexible materials and construction methods that maintain structural integrity during bending, allowing adaptability to various display geometries.
Solution Approach 2:
The patent divides the display system into multiple discrete flexible panels that can be independently manufactured and then assembled. This segmentation allows each panel to be manufactured with standard precision on flat surfaces, while the flexible nature enables the final assembled structure to conform to curved geometries, resolving the precision-flexibility trade-off.
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 enables a larger, thinner, and more browsable display device with reduced display and luminance unevenness, capable of displaying images on curved surfaces by minimizing seam recognition and impurity entry, thus enhancing reliability and display quality.
Implementation Method 1
In the light-transmitting layer, a transmittance with respect to light in a wavelength range of 450 nm to 700 nm is 80% or more on the average. A refractive index of the light-transmitting layer is higher than that of air.
Implementation Method 2
A refractive index of the light-transmitting layer is higher than that of air. The light-transmitting layer is between the first display panel and the second display panel.
Data Source
AI summary
A display device that can display an image along a curved surface is provided. In the display device, a first display panel and a second display panel overlap each other with a light-transmitting layer provided therebetween. The light-transmitting layer is positioned on a display surface side of the first display panel, and on a side opposite to the display surface of the second display panel. The light-transmitting layer has an average transmittance of 80% or more with respect to light in the wavelength range of 450 nm to 700 nm and a refractive index higher than that of air. A display region of the first display panel overlaps a region transmitting visible light of the second display panel with the light-transmitting layer provided therebetween. It is preferred that the display region of the first display panel not overlap with a region blocking visible light of the second display panel.