Display Panel Bias Wire Layout for Transparent Component Areas
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Solution Overview
Problem
Display panels face challenges in effectively displaying images in areas where components such as electronic elements are present, limiting their functionality and design flexibility.
Innovation Solution
A display panel design that includes a main display area with main sub-pixels and a component area with auxiliary sub-pixels, utilizing a bias wire connected to a bottom metal layer at a different layer from the driving voltage line, allowing image display even in component areas with components like cameras or sensors, and ensuring high light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a component area with electronic elements is included in the display panel, then the functionality and design flexibility are improved, but the image display capability in that area is degraded
Solution Approach 1:
The display panel is divided into a main display area and a component area with distinct functions. The main display area is dedicated to high-quality image display, while the component area accommodates electronic elements like cameras and sensors. This segmentation allows each zone to optimize its specific function without compromising the other.
Solution Approach 2:
Different regions of the display panel are assigned different properties: the main display area uses conventional structures optimized for image quality, while the component area implements a transparent substrate structure with modified wiring layers to enable both component mounting and light transmission for imaging functions.
2Reliability
If a bottom metal layer is added between the substrate and auxiliary pixel circuits, then electrostatic discharge protection is improved, but the structural complexity is increased
Solution Approach 1:
The bottom metal layer serves multiple functions simultaneously: it acts as an electrostatic discharge protection layer, provides electrical connection to auxiliary pixel circuits, and functions as a reflective electrode for the display elements. This multi-functionality reduces the need for separate dedicated structures.
Solution Approach 2:
The electrostatic protection function is merged with the electrical connection function by integrating the bottom metal layer into the existing circuit architecture. The same metal layer that connects to auxiliary pixel circuits also serves as the electrostatic discharge protection layer, eliminating the need for a separate protection structure.
3Area of stationary object
If auxiliary display elements are arranged in the component area, then the display area is extended, but the light transmittance may be reduced
Solution Approach 1:
A transparent substrate structure is used in the component area to minimize light blocking. The thin film structure allows light to pass through effectively while still supporting the auxiliary display elements and electronic components, maintaining high light transmittance for imaging functions.
Solution Approach 2:
The display functionality is extended to the component area by utilizing the vertical stacking arrangement. Auxiliary pixel circuits and display elements are positioned in different layers, allowing light transmission through transparent regions while maintaining display capability in the extended area.
Data Source
AI summary
A display panel includes: a main display area; a component area including a transmission area; a peripheral area outside the main display area; a substrate; main display elements on the substrate to correspond to the main display area; main pixel circuits respectively connected to the main display elements; auxiliary display elements on the substrate to correspond to the component area; auxiliary pixel circuits respectively connected to the auxiliary display elements; a driving voltage line to apply a driving voltage to the main pixel circuits; a data line to apply a data signal to the main pixel circuits; a bottom metal layer between the substrate and the auxiliary pixel circuits at the component area; and a bias wire connected to the bottom metal layer, and located at the main display area.