Display Device Transmissive Area Sensor Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to reduce the bezel area of display devices while effectively integrating sensors, as it is difficult to dispose sensors in a narrow bezel area without compromising the screen-to-body ratio and sensing sensitivity.
Innovation Solution
The solution involves a display device design with a substrate having a first and second display area, where the second display area includes a transmitting area with higher transmittance for specific wavelengths, allowing for improved sensor sensitivity by optimizing the arrangement of signal lines and a common electrode with varying thickness and openings to enhance light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the bezel area is reduced to increase screen-to-body ratio, then the screen ratio is improved, but it becomes difficult to dispose sensors in the bezel area
Solution Approach 1:
The patent moves the sensor from the traditional bezel area to the display area, utilizing the vertical dimension by placing it behind the display panel. This dimensional relocation allows the sensor to function effectively while maintaining a reduced bezel design, as the sensor no longer occupies horizontal bezel space but instead integrates into the vertical stack of the display structure.
Solution Approach 2:
The sensor is nested within the display panel structure, specifically positioned behind the display area. This nesting approach allows the sensor to be integrated into the existing display architecture without requiring additional external space, thereby enabling both reduced bezel size and functional sensor integration.
2Measurement precision
If the transmittance of the display area is increased for sensor sensitivity, then the sensing sensitivity is improved, but the image display quality may be compromised
Solution Approach 1:
The patent applies local quality by creating a transmitting area with different optical properties than the surrounding display area. This transmitting area has enhanced transmittance specifically optimized for sensor wavelengths, while the rest of the display area maintains its normal display characteristics. This localized differentiation allows the sensor to receive sufficient light without compromising the overall image display quality.
Solution Approach 2:
The display area is segmented into distinct functional zones: a transmitting area optimized for sensor transmittance and other areas for normal image display. This segmentation allows each zone to be optimized for its specific function, with the transmitting area providing high transmittance for sensing while surrounding areas maintain display quality, thus resolving the contradiction between sensing sensitivity and image quality.
3Illumination intensity
If the common electrode thickness is varied to optimize transmittance, then the light transmittance is improved, but the manufacturing complexity increases
Solution Approach 1:
The common electrode is designed with local quality variations, where the thickness is adjusted specifically in the transmitting area to optimize light transmittance for sensor operation. The electrode maintains its standard thickness in other areas where display functionality is prioritized. This localized thickness modification achieves enhanced transmittance where needed without unnecessarily complicating the overall electrode structure.
Solution Approach 2:
Instead of varying the common electrode thickness across the entire display area, the patent applies partial action by modifying the thickness only in the specific transmitting area where sensor transmittance is critical. This selective approach achieves the necessary optical optimization with minimal additional manufacturing complexity, avoiding excessive structural changes throughout the entire device.
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 increases the screen-to-body ratio and improves sensing sensitivity by allowing higher transmittance in the display area for functions other than image display, such as infrared sensing, while maintaining image quality.
Implementation Method 1
the transmitting area includes a first transmitting area and a second transmitting area, which have different transmittances from each other... in the second transmitting area, at least a part of the signal line and the common electrode overlap each other
Data Source
AI summary
A display device: a substrate including a first display area and a second display area; a signal line which overlaps the first display area and the second display area; and a common electrode which overlaps the first display area and the second display area, where the first display area includes a first pixel area, the second display area includes a second pixel area and a transmitting area, the transmitting area includes a first transmitting area and a second transmitting area, which have different transmittances from each other, the common electrode overlaps the first pixel area, the second pixel area and the second transmitting area, and in the second transmitting area, at least a part of the signal line and the common electrode overlap each other.