Hybrid OLED-Micro LED Display Panel for Under-Screen Camera Transmittance
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Solution Overview
Problem
Current liquid crystal display (LCD) technologies face challenges in achieving high screen-to-body ratio due to low transmittance and accelerated aging of OLED pixels in the under-screen camera region, leading to poor photo shooting and display effects.
Innovation Solution
A display panel design incorporating a substrate with both OLED and Micro LED pixels, where the OLED pixels use an active matrix and the Micro LED pixels use a passive matrix, with specific cabling and light transmission features to enhance transmittance and consistency across display regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the size of OLED pixel in under-screen camera region is reduced to increase light transmittance, then light transmittance is improved, but pixel aging is accelerated and ghost image faults occur more easily
Solution Approach 1:
The display panel is divided into two distinct display regions: a first display region using OLED pixels for normal display, and a second display region using Micro LED pixels for under-screen camera functionality. This segmentation allows each region to be optimized independently, with the Micro LED region specifically designed for high transmittance without suffering from the aging issues that would affect a reduced-size OLED pixel.
Solution Approach 2:
Different display technologies are applied to different regions of the display panel according to their specific functional requirements. The under-screen camera region (second display region) uses Micro LED pixels with optimized characteristics for light transmission, while the remaining area (first display region) uses conventional OLED pixels for standard display performance. This local differentiation resolves the contradiction by providing high transmittance exactly where needed without compromising overall display quality or introducing aging issues.
2Reliability
If metal anode and metal driver circuit cables are used in OLED pixel, then electrical connection is ensured, but light transmittance is reduced causing poor photo shooting effect
Solution Approach 1:
The invention changes the fundamental parameters of the light-emitting component in the under-screen camera region by transitioning from OLED to Micro LED technology. Micro LED pixels inherently require different electrical connection structures and cable configurations that achieve the necessary electrical connectivity while maintaining superior light transmittance properties compared to traditional OLED metal anode and cable structures.
Solution Approach 2:
The display panel employs a composite structure combining two different display technologies (OLED and Micro LED) in different regions. The Micro LED region uses composite material configurations for its electrical connections and light-emitting structure that are optimized for both electrical performance and optical transparency, effectively resolving the contradiction between electrical connection reliability and light transmittance in the under-screen camera region.
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 improves light transmittance and photo shooting effects in the under-screen camera region while maintaining display consistency, reducing pixel aging and ghost image issues.
Implementation Method 1
Each Micro LED pixel located in the second display region has a light emitting region and a light transmission region
Implementation Method 2
The OLED pixel may include an OLED light emitting device and a pixel driver circuit
Data Source
AI summary
This application provides a display panel, a preparation method therefor, and a display apparatus. A first display region of the display panel has an OLED pixel, a second display region has a Micro LED pixel, the Micro LED pixel has a light emitting region and a light transmission region, and a camera is disposed below the second display region. After the Micro LED pixel is used in the second display region, display pixels having a same area in the first display region and the second display region can be designed, to implement display effect consistency between the first display region and the second display region. Because a size of the Micro LED pixel for light emitting is small, it can be ensured that the Micro LED pixel has a large light transmission region, so that light transmittance of the second display region can be improved.