Display Panel Conductive Layer Thickness for Under-Display Light Sensing
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Solution Overview
Problem
In electronic devices like smartphones and tablets, the integration of light sensing elements such as front cameras and sensors is hindered by low light transmittance through the display panel, resulting in poor image quality due to the thickness of film layers, which obstructs full-screen display functionality.
Innovation Solution
A display panel design with a first display area having a thinner conductive layer than a second display area, allowing greater light transmittance for light sensing elements positioned beneath the first display area, ensuring they receive sufficient light for proper operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a uniform thickness conductive layer is used across the entire display panel, then the manufacturing process is simple, but the light transmittance in the first display area is insufficient for light sensing elements
Solution Approach 1:
The conductive layer is designed with different thicknesses in different regions: a first thickness in the first display area (where light sensing elements are located) and a second thickness in the second display area. This local differentiation allows the first display area to have higher light transmittance for proper light sensing element operation, while the second display area maintains sufficient thickness for its functional requirements, thus resolving the contradiction between uniform manufacturing simplicity and localized performance optimization.
Solution Approach 2:
The conductive layer is segmented into at least two distinct portions based on spatial location: a first portion in the first display area and a second portion in the second display area. This segmentation enables independent optimization of each region's thickness to meet different functional requirements, with the first portion optimized for light transmittance and the second portion optimized for its specific function, thereby resolving the technical contradiction.
2Reliability
If the conductive layer thickness is increased to ensure proper function, then the functional performance is improved, but the light transmittance for light sensing elements deteriorates
Solution Approach 1:
The conductive layer thickness is locally optimized: in the first display area where light sensing elements are positioned, the conductive layer has a reduced thickness to maximize light transmittance and ensure proper light sensing element operation. In other areas where different functional requirements exist, the conductive layer maintains sufficient thickness. This localized quality differentiation simultaneously satisfies both the reliability requirement for light sensing elements and the functional requirements of other display areas.
Solution Approach 2:
The conductive layer is divided into spatially distinct segments with different thickness characteristics. The first portion in the first display area is designed with reduced thickness to ensure high light transmittance for reliable light sensing element operation, while the second portion in the second display area maintains greater thickness for its specific functional needs, thus resolving the contradiction between reliability and illumination intensity.
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
This design enhances light transmittance in the first display area, enabling light sensing elements to function effectively, thereby achieving a full-screen display without compromising image quality.
Implementation Method 1
the light transmittance of the first display area can be greater than the light transmittance of the second display area, so that the one or more light sensing elements disposed below the first display area can receive enough light
Data Source
AI summary
A display panel, a manufacturing method thereof, and a display device. The display panel includes a first display region and a second display region. The display panel further includes a base substrate, a driving circuit layer, a light emitting functional film layer and a conductive layer, which are located in the first display region and the second display region. The driving circuit layer is disposed on the base substrate; the light emitting functional film layer is disposed on the driving circuit layer; and the conductive layer is disposed on the light emitting functional film layer. A thickness of a portion of the conductive layer located in the first display region is less than a thickness of a portion of the conductive layer located in the second display region.