Under-Display Sensor Integration via Light-Shielding Layer
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Solution Overview
Problem
Conventional display technologies face challenges in achieving a high screen-to-body ratio due to the need for bezel space to accommodate sensors like front-facing cameras and fingerprint recognition, limiting the full-screen display experience and portability of smartphones.
Innovation Solution
A display substrate design with a light-shielding layer and optimized pixel arrangement allows for increased transmittance in specific regions, eliminating the need for bezel space by integrating sensors under the screen, enhancing the screen-to-body ratio and display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If sensors are placed in the bezel area, then sensor functionality is achieved, but the screen-to-body ratio is reduced and the display area is limited
Solution Approach 1:
The patent moves sensors from the traditional bezel plane to a subsurface dimension by integrating them into the display substrate structure. The light-shielding layer is positioned between the base substrate and the pixel circuit, creating a three-dimensional arrangement that allows sensor integration without occupying display area.
Solution Approach 2:
The patent embeds the light-shielding layer containing sensors within the multi-layer display substrate structure. The shielding layer with imaging holes is nested between the base substrate and the pixel circuit layer, allowing sensors to be housed within the display structure itself rather than adding external components.
2Illumination intensity
If the light-shielding layer is added to integrate sensors under the screen, then transmittance is improved and screen-to-body ratio is increased, but the manufacturing process becomes more complex
Solution Approach 1:
The patent divides the display substrate into distinct functional layers: base substrate, light-shielding layer with imaging holes, pixel circuit layer, and color filter layer. This segmentation allows each layer to be optimized independently while maintaining overall functionality.
Solution Approach 2:
The light-shielding layer features localized transmittance properties with imaging holes positioned specifically in regions where sensor integration is needed. The shielding portion blocks light in other areas to protect pixel circuits, creating spatially varying optical properties that balance sensor functionality with display performance.
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 enables a more compact smartphone design with improved display performance by allowing sensors to be placed under the screen, increasing transmittance and optimizing the display effect without compromising image integrity.
Implementation Method 1
a light-shielding layer, located between the base substrate and the first pixel circuit, the light-shielding layer includes a shielding portion located in the first region
Implementation Method 2
the plurality of imaging holes are arranged in the shielding portion of the light-shielding layer, and the plurality of imaging holes is configured to enable the light to transmitted therethrough
Data Source
AI summary
A display substrate, a method for manufacturing the same and a display device are provided. The display substrate includes a base substrate and a thin film transistor array arranged on the base substrate. Multiple pixels arranged in an array are provided in an effective display region of the display substrate. The effective display region includes an optical element arrangement region and other display regions, and a transmittance of the optical element arrangement region is larger than transmittances of the other display regions. In the optical element arrangement region, an optical element is arranged on a side of the base substrate away from the thin film transistor array, and the optical element emits and receives light that is transmitted through the display substrate.