Under-Display Optical Area Layout With Separate OLED Init Lines
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Solution Overview
Problem
Display devices with optical components face a challenge as the presence of a hole for the optical device reduces the display area ratio and compromises display quality.
Innovation Solution
A display device design with a main display area and sub-display areas incorporating light transmission zones, utilizing separate initialization voltage lines for main and sub-light emitting elements, ensuring uniform luminance and maintaining display quality and supporting the integration of optical devices, allowing the optical device to which the optical device to operate effectively, even if it overlaps with the sub-display area and the optical device is integrated into electronic devices without physical interruptions like holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hole is created in the display area to accommodate an optical device, then the optical device can be integrated into the electronic device, but the display area ratio decreases and display quality deteriorates
Solution Approach 1:
The display area is segmented into a main display area and one or more sub-display areas. The sub-display areas are positioned to overlap with the optical device, allowing light transmission while maintaining the integrity of the main display area. This segmentation enables the optical device to be integrated without creating holes in the primary display region, thus preserving display quality and area ratio.
2Adaptability or versatility
If a hole is created in the display area to accommodate an optical device, then the optical device can be integrated into the electronic device, but display quality deteriorates
Solution Approach 1:
Different regions of the display are assigned different functions: the main display area is optimized for high-quality image display, while the sub-display areas are optimized for light transmission to the optical device. This local differentiation allows each region to perform its specific function optimally, maintaining overall display quality while enabling optical device integration.
Solution Approach 2:
Instead of creating a hole (removing material in the z-direction), the patent adds a sub-display area layer in the planar dimension that overlaps with the optical device. This dimensional approach allows light to pass through the sub-display area to reach the optical device below, while the main display area remains intact for high-quality visualization.
3Manufacturing precision
If separate initialization voltage lines are used for main and sub-light emitting elements, then uniform luminance is achieved, but circuit complexity increases
Solution Approach 1:
Separate initialization voltage lines are provided for the main light emitting elements and sub-light emitting elements. This allows different initialization voltages to be applied to different regions, ensuring that each region achieves uniform luminance according to its specific requirements. The main display area receives one initialization voltage while the sub-display area receives another, optimizing display quality in each region.
Data Source
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AI summary
A display device includes: a substrate with a display area (DA) having emission areas (MEA, SEA) and a surrounding non-display area (NDA), a circuit layer (120) on the substrate (110), and an element layer (130) on the circuit layer (120). The display area (DA) includes a main display area (MDA) with emission areas (MEA) arranged side by side and at least one sub-display area (SBDA) surrounded by the main display area (MDA). Each sub-display area (SBDA) includes light transmission areas (TRSA) between emission areas (SEA). The element layer (130) has main light-emitting elements (MLE) in the main display area's emission areas (MEA) and sub-light-emitting elements (SLE) in the sub-display area's emission areas (SEA). The circuit layer (120) includes main pixel drivers (MEPD) connected to the main light-emitting elements (MLE), sub-pixel drivers connected (SEPD) to the sub-light-emitting elements (SLE), a main anode initialization voltage line (MVAIL) for initializing main light-emitting elements (MLE) and a sub-anode initialization voltage line (SVAIL) for initializing sub-light-emitting elements (SLE).