Display Panel Transition Region Electrode Structure
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Solution Overview
Problem
Existing display panels face challenges in improving light transmittance in light-transmitting regions, leading to issues like abnormal overlap and Ag migration, which affect display performance.
Innovation Solution
A display panel design with a transition region and a light-transmitting region, featuring a driving backboard with a first driving circuit, planarization layers, and electrode layers that ensure high light transmittance and prevent Ag migration by optimizing the structure for electrical connections and material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light transmittance of the light-transmitting region is increased to improve display performance, then the display quality is improved, but abnormal overlap and Ag migration occur leading to display abnormalities
Solution Approach 1:
The patent introduces a first planarization layer and a second planarization layer as intermediary structures between the driving backboard and the electrode layers. These planarization layers serve as mediator structures that prevent direct contact and potential Ag migration while maintaining electrical connectivity through the electrode layers that extend through them. This intermediary structure resolves the contradiction by enabling high light transmittance without causing display abnormalities.
Solution Approach 2:
The patent extracts the Ag-containing electrode material from direct contact with the driving backboard by introducing planarization layers. The first electrode layer and second electrode layer are designed to extend through the planarization layers, effectively separating the Ag migration source from the sensitive display regions while maintaining electrical functionality.
2Area of stationary object
If driving circuits are integrated in the transition region to enable full-screen display, then the screen-to-body ratio is increased, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies different structural configurations to different regions of the display panel. The light-transmitting region has a specific structure with planarization layers and electrode layers optimized for light transmission, while the transition region contains the driving circuits with their own structural arrangement. This local differentiation allows full-screen display functionality while managing the complexity of integrating driving circuits in specific areas.
3Illumination intensity
If electrode layers are designed to extend through planarization layers for electrical connection, then light transmittance is maintained, but the manufacturing precision requirements increase
Solution Approach 1:
The patent designs the first electrode layer and second electrode layer to extend through the planarization layers in a predetermined manner. The electrode layers are configured to pass through the planarization layers at specific locations, establishing electrical connections before final assembly. This preliminary design of the electrode path simplifies the manufacturing process by providing clear alignment guides and reducing the precision requirements compared to post-assembly connection methods.
Data Source
AI summary
A display panel and a display device. The display panel includes a transition region, a light-transmitting region, and a driving backboard. The driving backboard includes: a first driving circuit located in the transition region, the first driving circuit having a first output end; a first planarization layer located on the driving backboard of the transition region and the light-transmitting region; a first electrode layer located at a side of the first planarization layer of the transition region; a second planarization layer located at a side of the first planarization layer and the first electrode layer; a second electrode layer located at a side of the second planarization layer of the transition region and the light-transmitting region, and the second electrode layer extending through the second planarization layer to contact with the first electrode layer.