Display Panel Optical Area Signal Routing and Transmittance Control
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Solution Overview
Problem
Conventional display devices with integrated optical electronic devices, such as cameras and sensors, face design limitations due to the need for these components to be exposed on the front surface, leading to increased bezel size and reduced design flexibility, as well as issues with light transmission and image quality.
Innovation Solution
A display panel design featuring a substrate with distinct optical and normal areas, where the optical areas have a light transmission structure allowing for invisible placement of optical electronic devices beneath the display, reducing line characteristic deviations and transmittance variations, thereby enhancing image quality and operational performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical electronic devices are exposed on the front surface to receive light, then light reception function is improved, but bezel size increases and design flexibility is reduced
Solution Approach 1:
The optical electronic device is nested within the display device body, positioned in the lower portion behind the display panel. Light passes through the display panel to reach the optical electronic device, allowing the device to be hidden within the bezel area rather than protruding outward, thus maintaining compact design while preserving light reception capability
Solution Approach 2:
The optical electronic device is relocated from the front surface (2D plane) to the lower portion interior space (3D depth dimension). This spatial reconfiguration allows light to traverse through the display panel thickness to reach the sensor, effectively utilizing the Z-axis dimension to resolve the conflict between hidden placement and light access
2Reliability
If optical electronic devices are exposed on the front surface, then light reception is enabled, but design flexibility is significantly limited
Solution Approach 1:
By moving the optical electronic device to the lower portion behind the display panel and enabling light transmission through the panel, the design frees the front surface for various aesthetic and functional configurations. This dimensional shift allows diverse design possibilities including different panel layouts, bezel configurations, and optical path arrangements without being constrained by front-surface device placement
3Ease of manufacture
If signal lines pass through the optical area, then electrical connection is achieved, but line characteristic deviation increases
Solution Approach 1:
The signal lines are routed specifically through the non-optical area rather than the optical area, creating a localized pathway that avoids the transmissive region. This spatial separation maintains uniform light transmission characteristics in the optical area while still achieving electrical connection functionality through the non-optical routing path
Solution Approach 2:
The display area is segmented into optical and non-optical regions, with signal lines confined to the non-optical area. This segmentation allows independent optimization of light transmission in the optical area and electrical routing in the non-optical area, preventing interference between optical performance and electrical connection requirements
4Reliability
If light transmission structure is implemented in optical area, then optical electronic device performance is improved, but transmittance variation increases
Solution Approach 1:
The light transmission structure is implemented specifically in the optical area with controlled characteristics, while the non-optical area maintains different properties. By localizing the transmission optimization to the optical region and separating it from signal line routing in the non-optical region, the patent minimizes transmittance variation caused by signal line interference while maximizing optical performance where needed
Data Source
AI summary
Embodiments of the disclosure relate to a display panel and a display device that may provide a line characteristic deviation reduction structure and a transmittance variation range reduction structure. The device includes signal lines and a common electrode on the substrate. The display area of the device includes a first optical area where light is transmitted, and a normal area positioned outside the first optical area. The normal area includes emission areas, and the first optical area includes emission areas and first transmissive areas. The common electrode includes common electrode holes respectively positioned in the first transmissive areas. The signal lines include normal signal lines not passing through the first optical area and disposed only in the normal area, and specific signal lines passing through the first optical area. Each specific signal lines overlap at least one common electrode holes.