Auxiliary Cathode Layer Thickness for Dual-Function Display Mirrors
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Solution Overview
Problem
Conventional rearview mirrors in vehicles face challenges in simultaneously achieving clear display and reflection functions due to high light reflection and emission, making it difficult for drivers to see both displayed information and reflected images effectively.
Innovation Solution
A display panel with a base substrate, pixel defining layer, cathode layer, and auxiliary cathode layer, where the auxiliary cathode layer has varying thicknesses corresponding to openings and non-openings, allowing for improved light transmittance and reflectivity, enabling clear image display and reflection simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional rearview mirror uses a reflective mirror and display screen in the same area, then both display function and reflection function are provided, but the high light reflection from the mirror and high light emission from the display screen make it difficult for drivers to clearly see both simultaneously
Solution Approach 1:
The mirror surface is divided into multiple pixel units, with each pixel corresponding to a sub-region of the reflective mirror. This segmentation allows independent control of reflection and display at different locations, enabling the system to simultaneously provide both functions without light interference by activating only the necessary pixels for display while maintaining reflection in other areas
Solution Approach 2:
Different regions of the mirror surface have different optical properties - some areas maintain high reflectivity for mirror function while others have controlled light emission for display function. The pixel defining layer and auxiliary cathode layer create local variations in optical characteristics, allowing each region to be optimized for its specific function
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
The solution enhances light transmittance at display areas and reflectivity at non-display areas, improving contrast and allowing drivers to see both displayed information and reflected images clearly, thus addressing the limitations of conventional rearview mirrors.
Implementation Method 1
the auxiliary cathode layer has a first thickness at positions corresponding to the plurality of openings, and a second thickness at positions other than the plurality of openings... the display panel is configured to display an image at the positions corresponding to the plurality of openings and reflect an image at the positions other than the plurality of openings
Implementation Method 2
the auxiliary cathode layer has a first thickness at positions corresponding to the plurality of openings... the display panel is configured to display an image at the positions corresponding to the plurality of openings
Data Source
AI summary
A display panel and a producing method therefor, a vehicle-mounted rearview mirror, and a display device. The display panel comprises: a base substrate; a pixel defining layer, located at one side of the base substrate, the pixel defining layer comprising a plurality of openings distributed in an array; a cathode layer, located at the side of the pixel defining layer opposite to the base substrate; and an auxiliary cathode layer, located at the side of the cathode layer opposite to the pixel defining layer, the auxiliary cathode layer being directly in contact with and electrically connected to the cathode layer. The auxiliary cathode layer has a first thickness at positions corresponding to the plurality of the openings, and a second thickness at positions other than the openings; the first thickness is less than the second thickness.