Light Transmission Layer Opening for Flexible Display Light Leakage
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Solution Overview
Problem
In flexible display panels, the thickness difference between the FPC and the substrate leads to incomplete bonding, causing light leakage as large-angle light is diffusely reflected by the bevel, affecting user experience by emitting light from non-operable regions within the visible area.
Innovation Solution
A display device with a light transmission layer extending over the drive circuit plate, featuring an opening adjacent to the display region, which reduces the bevel width by overlapping with it, and optionally filled with a light shielding structure to absorb stray light, thereby minimizing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a bonding layer is formed to attach the FPC to the substrate, then the bonding strength is improved, but light leakage occurs due to the bevel caused by thickness difference
Solution Approach 1:
The patent extracts the harmful bevel region by creating an opening in the light transmission layer that exposes the side surface of the drive circuit plate. This allows the bevel to be separated from the continuous light transmission path, preventing light leakage while maintaining bonding strength in the rest of the structure.
Solution Approach 2:
The light transmission layer with an opening acts as an intermediary structure. It maintains light transmission functionality while creating a discontinuity that blocks the bevel from causing light leakage. The opening serves as a mediator between the bonding requirement and the light leakage prevention requirement.
2Object-generated harmful factors
If the light transmission layer completely covers the drive circuit plate, then light leakage is prevented, but manufacturing precision is reduced due to bonding difficulties
Solution Approach 1:
The light transmission layer is segmented by creating an opening, transforming it from a continuous covering layer to a discontinuous structure. This segmentation makes the bonding process more feasible by reducing the area requiring precise alignment, while the remaining covered portions continue to prevent light leakage.
Solution Approach 2:
The light transmission layer applies different properties to different regions: it covers most areas to prevent light leakage, but creates an opening in the specific region adjacent to the display region where bonding precision would be compromised. This local differentiation resolves the contradiction between comprehensive coverage and manufacturing feasibility.
3Object-generated harmful factors
If the opening width is reduced to minimize light leakage, then light shielding performance is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent optimizes the opening width parameter to a specific range (0.25-0.5 mm) that balances light leakage prevention with manufacturing ease. This parameter change transforms the opening from being too narrow (difficult to manufacture) to an optimal width that effectively blocks light while being feasible to fabricate using standard processes.
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 effectively reduces light leakage by controlling the width of the opening between 0.25 mm to 0.5 mm, ensuring that large-angle light is absorbed or blocked, improving user experience by preventing light emission from non-operable regions.
Implementation Method 1
A light transmission layer which is extended from the display region to above the drive circuit plate within the non-display region and has an opening... effectively reduces light leakage by controlling the width of the opening between 0.25 mm to 0.5 mm, ensuring that large-angle light is absorbed or blocked
Data Source
AI summary
A display device and a method of manufacturing the same are provided. The display device includes a display panel having a display region and a non-display region that are divided in a plane where a light-emitting surface of the display panel is located, a drive circuit plate being disposed on the non-display region; a light transmission layer which is extended from the display region to above the drive circuit plate within the non-display region and has an opening, the opening being adjacent to a boundary of the drive circuit plate close to the display region and being disposed on a side of the drive circuit plate close to the display region.