Tiled Display Light-Blocking Structure for Seam Masking
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Solution Overview
Problem
Large-sized display devices face increased defect rates and reduced productivity due to the higher number of pixels, and tiled display devices suffer from a sense of disconnection and reduced immersion due to visible seams between connected display units.
Innovation Solution
The implementation of a display device structure that includes a substrate with emission areas and a light blocking area, featuring a thin film transistor layer, a light emitting element layer, a wavelength conversion layer, and a color filter layer with specific light blocking parts to prevent light leakage and reduce the visibility of seams in tiled configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large-sized display device is manufactured with increased number of pixels, then the display area is enlarged, but the defect rate increases and productivity deteriorates
Solution Approach 1:
The display device is divided into multiple small-sized display panels that are tiled together to form a large-sized display. Each panel contains a non-display area with a light blocking part that helps mask the seams between panels. This segmentation approach allows manufacturing of smaller, higher-quality panels while achieving a large overall display area, thereby maintaining high productivity and low defect rates.
2Area of stationary object
If multiple display devices are connected to form a tiled display, then the display area is enlarged, but visible seams appear causing a sense of disconnection
Solution Approach 1:
The light blocking part is specifically positioned in the non-display area of each display panel, creating a local dark region that masks the seam between adjacent panels. This local modification does not affect the display quality of the emission areas while effectively reducing the visibility of boundary portions, thereby maintaining visual continuity across the tiled display.
3Area of stationary object
If the non-display area is reduced to minimize seams, then the coupling area between display devices is reduced, but light leakage increases
Solution Approach 1:
The light blocking part acts as an intermediary element within the non-display area that blocks light leakage without requiring a large coupling area. By introducing this light-blocking structure, the patent achieves effective light leakage prevention while maintaining a compact tiled display configuration with minimized seams.
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 solution effectively prevents light leakage and reduces the height difference in non-display areas, thereby minimizing the recognition of seams between display units and enhancing the sense of immersion in images displayed on tiled display devices.
Implementation Method 1
a wavelength conversion layer on the light emitting element layer to convert a peak wavelength of light provided from at least some of the light emitting elements
Implementation Method 2
a color filter layer on the wavelength conversion layer. The color filter layer including: color filters in each of the emission areas
Implementation Method 3
a second light blocking part in the non-display area
Data Source
AI summary
A display device including: a substrate having a display area and a non-display area extending around the display area, the display area having emission areas and a light blocking area; a thin film transistor layer on the substrate and including thin film transistors; a light emitting element layer on the thin film transistor layer and including light emitting elements; a wavelength conversion layer on the light emitting element layer to convert a peak wavelength of light provided from at least some of the light emitting elements; and a color filter layer on the wavelength conversion layer. The color filter layer includes: color filters in each of the emission areas; a first light blocking part in the light blocking area; and a second light blocking part in the non-display area.