Display Panel Sensor Integration for Wider Active Area
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Solution Overview
Problem
Existing display devices face challenges in maximizing display area due to the integration of various sensors such as optical, ultrasonic, and fingerprint sensors, which occupy space and limit the wider display area required for image display.
Innovation Solution
The integration of sensor devices into the display panel itself, utilizing a thin-film transistor layer and emission material layer with light-emitting and light-receiving elements, allowing for sensor functionality without additional space, and the use of a substrate with a curvature and specific electrode configurations to optimize sensor placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sensor devices are integrated into the display panel, then the display area is increased, but the structural complexity increases
Solution Approach 1:
The patent merges sensor devices (optical sensor, ultrasonic sensor, fingerprint sensor) with the display panel by integrating them into the same substrate structure. The sensor devices share common elements with the display panel, including the substrate, thin-film transistor layer, and emission material layer, thereby increasing the display area while managing structural complexity through unified design.
Solution Approach 2:
The display panel is designed to perform multiple functions: displaying images through light-emitting elements and sensing through light-receiving elements, ultrasonic waves, and fingerprint detection. This multi-functionality is achieved by integrating different sensor types within the same display panel structure, allowing a single component to serve multiple purposes.
2Area of stationary object
If sensor devices are removed from the display device, then the display area is increased, but the sensor functionality is lost
Solution Approach 1:
Instead of removing sensor devices, the patent merges them with the display panel by integrating optical sensors, ultrasonic sensors, and fingerprint sensors into the display structure. This allows the display area to be maximized while sensor functionality is preserved through shared substrate and layer structures.
Solution Approach 2:
The sensor devices are nested within the display panel structure, with sensor elements embedded in the same substrate and layer system as the display elements. The light-receiving elements, ultrasonic sensors, and fingerprint sensors are positioned within the display panel's thin-film transistor layer architecture, allowing compact integration without compromising sensor performance.
3Reliability
If light-receiving elements are disposed on the first bank, then the sensor functionality is optimized, but the manufacturing complexity increases
Solution Approach 1:
The display panel is segmented into distinct functional regions: light-emitting elements for display, light-receiving elements for optical sensing, ultrasonic sensors for ultrasonic detection, and fingerprint sensors for biometric authentication. The light-receiving elements are specifically positioned on the first bank structure, creating specialized zones for different sensor functions while maintaining a systematic manufacturing approach.
Solution Approach 2:
Different regions of the display panel are assigned different functional qualities: the first bank area contains light-receiving elements for optical sensing, while other areas contain light-emitting elements, ultrasonic sensors, and fingerprint sensors. This local differentiation optimizes sensor functionality in specific zones without requiring complete redesign of the entire manufacturing process.
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 approach enables a larger display area by embedding sensors within the display panel, allowing for efficient image display while maintaining sensor functionality, thus enhancing the overall display device design.
Implementation Method 1
an emission material layer disposed on the thin-film transistor layer and including light-emitting elements
Implementation Method 2
light-receiving elements each including a first light-receiving electrode, a light-receiving semiconductor layer, and a second light-receiving electrode
Data Source
AI summary
A display device includes a thin-film transistor layer disposed on a substrate and including thin-film transistors; and an emission material layer disposed on the thin-film transistor layer. The emission material layer includes light-emitting elements each including a first light-emitting electrode, an emissive layer and a second light-emitting electrode, light-receiving elements each including a first light-receiving electrode, a light-receiving semiconductor layer and a second light-receiving electrode, and a first bank disposed on the first light-emitting electrode and defining an emission area of each of the light-emitting elements. The light-receiving elements are disposed on the first bank.