Display Panel Local Light-Emitting Layer Thickness for Higher Transmittance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing AMOLED display panels face challenges in achieving high light transmittance in the light-sensing region while maintaining full-screen display capabilities, with current methods either compromising on transmittance or display quality.
Innovation Solution
A display panel design with a reduced thickness of the light-emitting layer in the light-transmitting region, defined by a first opening in the second electrode layer, and a protruded structure at the opening's edge, ensuring equal pixel density and simplified processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If holes are formed in the light-sensing region to increase transmittance, then light transmittance is improved, but the region cannot emit light and full-screen display effect is lost
Solution Approach 1:
The light-emitting layer is designed with spatially varying thickness: thinner in the light-sensing region (first opening area) to allow light transmission, and thicker in the main display region for normal light emission. This local differentiation enables the same layer to serve dual functions of light transmission and light emission in different areas.
Solution Approach 2:
Instead of modifying the planar structure by creating holes (2D modification), the invention modifies the thickness dimension (3D modification) of the light-emitting layer. The thickness varies continuously or stepwise across different regions, transforming a 2D pattern problem into a 3D structural solution.
2Illumination intensity
If pixel density of the light-sensing region is reduced to enhance transmittance, then light transmittance is improved, but display effect and overall transmittance remain insufficient
Solution Approach 1:
The invention changes the thickness parameter of the light-emitting layer rather than the pixel density parameter. By controlling the thickness to be less than a first threshold value in the light-sensing region, sufficient light transmittance is achieved while maintaining normal pixel density for high-quality display effects.
3Illumination intensity
If the light-emitting layer thickness is reduced in the light-transmitting region, then light transmittance is improved, but processing complexity and encapsulation failure risk increase
Solution Approach 1:
The thickness variation of the light-emitting layer is designed and prepared in advance during the manufacturing process. The first opening pattern and thickness distribution are predetermined, allowing subsequent encapsulation and processing steps to proceed without additional complex operations.
Solution Approach 2:
The first opening structure acts as an intermediary element that facilitates both light transmission and maintains structural integrity. The opening design with specific dimensions and positioning enables light to pass through while providing a framework for proper encapsulation and reducing processing difficulties.
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes a first electrode layer, a light-emitting layer, and a second electrode layer sequentially stacked. The light-emitting layer includes first pixels disposed in a display light-transmitting region and second pixels disposed in a main display region. A first opening between the first pixels adjacent to each other is defined by the second electrode layer. A thickness of the light-emitting layer corresponding to the first opening is less than a thickness of the light-emitting layer between the second pixels adjacent to each other. Not only can the light transmittance of the display light-transmitting region be increased, but the process can be simpler.