Sensor-Area Display Panel Layout for Under-Display Sensing
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Solution Overview
Problem
Display devices face challenges in maintaining the sensing capabilities of sensor devices when they overlap with the display panel, as they can be hidden by pixels, scan lines, and power supply lines, leading to degraded performance.
Innovation Solution
The display device incorporates a design with a main area and a sensor area where sensor devices overlap in the thickness direction, utilizing first and second subpixels with different transistor counts and specific wiring configurations to ensure light transmission and minimize overlap with display elements, allowing for improved sensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sensor devices are disposed to overlap with the display panel, then the display area is widened, but the sensing capabilities are degraded because sensors are hidden by pixels, scan lines, data lines, and power supply lines
Solution Approach 1:
The display panel is divided into a main area with full display functionality and a sensor area with reduced display elements. This segmentation allows sensor devices to be positioned in the sensor area where fewer pixels, scan lines, data lines, and power supply lines are present, improving sensing capabilities while maintaining a large overall display area.
Solution Approach 2:
Different regions of the display panel have different qualities: the main area has complete display elements for high-quality image display, while the sensor area has reduced display elements to allow sensor devices to function properly. This local differentiation resolves the contradiction between display area and sensing capabilities.
2Measurement precision
If sensor devices are disposed in holes at the front of the display device, then sensing capabilities are maintained, but the display area is reduced due to holes and notches
Solution Approach 1:
The sensor area is merged with the display panel structure, allowing sensor devices to be positioned within the display area rather than creating separate holes or notches. The first subpixels in the sensor area maintain display functionality while allowing sensor devices to operate, combining both functions in a single integrated area.
3Measurement precision
If the number of transistors in first subpixels is reduced compared to second subpixels, then sensor device functionality is improved, but display quality in the sensor area may be reduced
Solution Approach 1:
Different transistor configurations are used in different areas: first subpixels in the sensor area have fewer transistors optimized for sensor functionality, while second subpixels in the main area have more transistors optimized for display quality. This local differentiation allows each area to be optimized for its specific function.
Solution Approach 2:
The pixel structure is segmented into two types with different transistor counts. First subpixels with reduced transistor counts are placed in the sensor area to improve sensor functionality, while second subpixels with full transistor counts are placed in the main area to maintain display quality.
Data Source
AI summary
A display device includes a display panel including a main area and a sensor area. Sensor devices overlap the sensor area of the display panel in a thickness direction of the display panel. The display panel includes first subpixels, which are disposed in the sensor area, and second subpixels, which are disposed in the main area. The number of transistors of each of the first subpixels is different from the number of transistors of each of the second subpixels.