Display Panel Spacer Design for Under-Screen Sensor Integration
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Solution Overview
Problem
Traditional electronic devices face challenges in integrating photosensitive components under the screen while maintaining high light transmittance and display panel strength, leading to reduced display quality and potential issues like water waves and Newton rings.
Innovation Solution
A display panel design with distinct light transmittance regions, utilizing first and second spacers distributed differently to optimize light transmittance and strength, where the ratio of spacer areas and sizes is carefully controlled to prevent collapse and ensure uniform pressure resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light transmittance of the display panel is improved to enable under-screen integration of photosensitive components, then the screen-to-body ratio is improved, but the intensity and quality of the display panel deteriorates
Solution Approach 1:
The patent applies different spacer configurations in different display regions: the first spacers with smaller equivalent sizes (0.5-1 times those of second spacers) are used in the first display region where photosensitive components are integrated, while the second spacers with larger equivalent sizes are used in the second display region. This local differentiation allows the first region to maintain high light transmittance for under-screen component integration while the second region provides sufficient structural support and pressure resistance, thereby resolving the contradiction between light transmittance and panel strength.
2Illumination intensity
If the equivalent size of orthographic projection of first spacers on substrate is reduced to increase light transmittance, then the light transmittance of first display region increases, but the first spacers may collapse during manufacturing process
Solution Approach 1:
The patent specifies that the ratio of equivalent sizes of orthographic projections of first spacers to second spacers on the substrate should be 0.5 to 1. This parameter control ensures that the first spacers maintain sufficient structural stability during manufacturing to prevent collapse, while their reduced size compared to second spacers allows for improved light transmittance in the first display region. The controlled parameter range balances optical performance with manufacturing reliability.
3Strength
If the ratio of total area of orthographic projections of first spacers to area of first display region is increased to improve strength, then the pressure resistance improves, but the light transmittance of first display region decreases
Solution Approach 1:
The patent implements local quality by using first spacers with smaller equivalent sizes in the first display region compared to second spacers in the second display region. The ratio of equivalent sizes is controlled at 0.5 to 1, which allows the first spacers to provide adequate pressure resistance and structural support in the first region while maintaining a smaller total area to minimize light blocking. This enables the first display region to achieve both sufficient strength and high light transmittance for under-screen component integration.
Data Source
AI summary
A display panel and a display apparatus. The display panel has a first display region and a second display region, wherein a light transmittance of the first display region is greater than a light transmittance of the second display region. The display panel includes: a substrate; a pixel definition layer; and a plurality of first spacers and a plurality of second spacers located on a side of the pixel definition layer away from the substrate. The plurality of first spacers are distributed in the first display region, and the plurality of second spacers are distributed in the second display region.