Display Panel Auxiliary Voltage Line for Stable Under-Display Integration
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Solution Overview
Problem
Display devices face challenges in integrating additional functions and components, such as cameras and sensors, within their structure without compromising light transmission and display quality.
Innovation Solution
A display panel design that includes a substrate with distinct areas for display elements and component areas, featuring initialization voltage lines, auxiliary voltage lines, and insulating layers to facilitate the integration of components like cameras and sensors while maintaining light transmission and display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If components such as cameras and sensors are integrated within the display area, then functionality is enhanced, but light transmission and display quality may be compromised
Solution Approach 1:
The display area is divided into a first area (display region) and a second area (component region), allowing spatial separation between display elements and components. This segmentation enables components to be integrated within the display area while maintaining light transmission in the display region, as the component region can be configured to minimize light interference.
2Adaptability or versatility
If initialization voltage lines are disconnected in the first area to accommodate components, then component integration is enabled, but voltage deviations between disconnected lines may occur
Solution Approach 1:
An auxiliary voltage line is introduced as an intermediary element arranged on a different layer to electrically connect the disconnected initialization voltage lines (first and second initialization voltage lines) in the first area. This auxiliary voltage line acts as a mediator that maintains voltage stability and prevents voltage deviations between the otherwise disconnected initialization lines, enabling both component integration and voltage reliability.
3Reliability
If multiple layers of voltage lines and insulating layers are added to maintain voltage stability, then voltage deviations are minimized, but device complexity increases
Solution Approach 1:
The auxiliary voltage line is arranged on a different layer (vertical dimension) from the first and second initialization voltage lines, which are in the same layer. This dimensional separation allows the auxiliary voltage line to connect the disconnected initialization lines without interfering with their planar arrangement, minimizing the increase in device complexity while maintaining voltage stability through the additional vertical layer.
Data Source
AI summary
A display panel includes: a substrate including a first area and a second area surrounding the first area; a first initialization voltage line extending in a first direction and electrically connected to the first display element; a second initialization voltage line extending in the first direction and electrically connected to the second display element; an auxiliary voltage line arranged on a layer different from layers on which the first initialization voltage line and the second initialization voltage line are arranged and electrically connecting the first initialization voltage line and the second initialization voltage line that are apart from each other; and a first insulating layer covering the first initialization voltage line, the second initialization voltage line, and the auxiliary voltage line and arranged below the plurality of display elements.