Through-Hole Display Multilayer Layout for Narrower Bezels
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Solution Overview
Problem
Existing organic light emitting display devices face challenges in reducing the hole bezel around through holes in the display region, which can lead to increased deviation of current and non-uniformity of brightness due to the presence of electronic elements.
Innovation Solution
The display device incorporates a through hole with a line region surrounding it, featuring multiple layers of signal lines that are electrically connected to pixels, including auxiliary layer lines, which reduce the width of the hole bezel by alternating layers and incorporating auxiliary electrodes to manage current deviation and brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a through hole is formed in the display region to accommodate electronic elements, then the display device can integrate additional functionality, but a hole bezel is created around the through hole which reduces the effective display area and creates dead space
Solution Approach 1:
The patent applies dimensionality change by moving signal lines from the same plane to multiple stacked layers. The first to fourth layer lines are positioned at different layers, allowing them to wrap around the through hole without occupying lateral display space. This vertical arrangement eliminates the need for a large hole bezel, converting a 2D space-consuming problem into a 3D layered solution that preserves display area while accommodating electronic elements.
2Area of stationary object
If the hole bezel width is reduced to maximize display area, then the effective display area increases, but current deviation increases and brightness uniformity deteriorates
Solution Approach 1:
By arranging signal lines in multiple stacked layers rather than a single plane, the patent reduces the lateral width of the hole bezel while maintaining adequate signal line spacing through vertical separation. This allows the hole bezel to be narrowed for maximum display area while the multi-layer configuration prevents current deviation by providing multiple distributed connection paths around the through hole.
Solution Approach 2:
The patent segments the signal lines into first to fourth layer lines positioned at different layers, with auxiliary layer lines providing additional connection paths. This segmentation creates multiple distributed current paths around the through hole, preventing current concentration and deviation. The segmented multi-layer structure maintains brightness uniformity even when the hole bezel width is reduced.
3Area of stationary object
If multiple layer lines are positioned at different layers around the through hole, then the hole bezel width can be reduced, but the device complexity increases due to multiple layers and auxiliary electrodes
Solution Approach 1:
The patent implements multi-functionality by designing the first to fourth layer lines and auxiliary layer lines to serve dual purposes: they provide electrical connections to pixels while simultaneously forming a compact multi-layer structure that minimizes hole bezel width. The auxiliary layer lines, positioned below the first layer lines or on the fourth layer lines, add connection capacity without requiring additional lateral space, making the structure both space-efficient and functionally robust.
Data Source
AI summary
A display device includes: a through hole; a line region surrounding the through hole; a display region surrounding the line region; first to fourth layer lines which are located in the line region and at different layers; auxiliary layer lines which are located below the first layer lines or on the fourth layer lines; pixels located in the display region; first signal lines which are electrically connected to the pixels and are along a first direction; and second signal lines which are electrically connected to the pixels and are along a second direction intersecting the first direction, wherein the auxiliary layer lines electrically connected to one of the second signal lines.