OLED Display Panel Shielding for Uniform Under-Panel Brightness
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Solution Overview
Problem
Conventional OLED display panels suffer from inconsistent brightness in regions with and without metal layers due to mirror reflection, affecting imaging quality, especially in camera-under-panel areas.
Innovation Solution
Incorporating a display panel design with a color filter and shielding parts arranged above exposed metal electrodes, forming a ring-shaped structure to absorb reflected light, ensuring consistent brightness across the display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizer is used to reduce reflectivity, then reflectivity is reduced, but light loss increases significantly
Solution Approach 1:
The patent removes the polarizer from the display structure and replaces it with a color filter layer that has light-absorbing characteristics. This extraction eliminates the 58% light loss caused by polarizers while still achieving reflectivity reduction through the color filter's inherent light absorption properties.
Solution Approach 2:
The patent changes the optical parameters of the display by using a color filter with specific light absorption characteristics instead of a polarizer. The color filter's absorption spectrum and optical density are optimized to reduce reflectivity while maintaining acceptable light transmission, fundamentally changing how light interacts with the display layers.
2Use of energy by moving object
If a color filter is used to replace the polarizer, then light-emitting rate increases, but mirror reflection on metal layers causes inconsistent brightness
Solution Approach 1:
The patent applies different optical properties to different regions of the display. The color filter layer has varying optical density and absorption characteristics in different areas, with stronger absorption in regions where metal layers are present to compensate for mirror reflection effects, thereby achieving uniform brightness across the entire display.
Solution Approach 2:
The patent introduces an intermediate layer between the metal layer and the color filter that has specific optical absorption properties. This intermediary layer absorbs the reflected light from the metal layer before it reaches the color filter, preventing the mirror reflection effect from causing brightness inconsistency while allowing the color filter to maintain its high light-emitting rate.
3Reliability
If metal layers are present in the display panel, then electrical conductivity is improved, but mirror reflection causes brightness inconsistency in camera regions
Solution Approach 1:
The patent converts the harmful mirror reflection effect into a beneficial outcome by using the reflected light path to identify where additional light absorption is needed. The color filter layer is designed with optimized absorption characteristics that specifically target the reflected light from metal layers, transforming the reflection problem into an opportunity for enhanced local light management and uniformity.
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 design reduces reflectivity and maintains consistent brightness, alleviating the issue of inconsistent display brightness and enhancing imaging quality.
Implementation Method 1
a plurality of shielding parts arranged above each of the exposed parts... an orthographic projection of one of the shielding parts in a direction perpendicular to the display panel body correspondingly covers an orthographic projection of one of the exposed parts
Data Source
AI summary
A display panel and a mobile terminal are provided. A shielding part is used for shielding an exposed part of a first electrode, so that most of the light entering the first electrode and being reflected can be shielded by the shielding part, the reflectivity of the display panel in a light-transmitting function sub-region is reduced, and then, the brightness in the light-transmitting function display sub-region is similar to or consistent with the brightness in a display sub-region, thereby avoiding the problem of inconsistent display brightness in the light-transmitting function display sub-region and the display sub-region in a conventional display panel.