Display Area Fingerprint Recognition via Light-Emitters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display panels with integrated fingerprint recognition units face challenges in maintaining a high screen-to-body ratio and accurate fingerprint recognition due to the placement of these units in non-display areas, which affects user experience and increases the risk of fingerprint recognition errors.
Innovation Solution
Incorporating an array substrate with light-emitting units and fingerprint recognition units in the display area, where the light-emitting units serve as light sources for the fingerprint recognition units, and configuring these units with different parameters to optimize light transmittance and sensitivity, thereby improving fingerprint recognition accuracy and screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fingerprint recognition unit is disposed in the non-display area of the display panel, then the fingerprint recognition function is provided, but the screen-to-body ratio is reduced and the user experience is affected
Solution Approach 1:
The patent merges the fingerprint recognition unit with the display area by positioning it at the boundary between display and non-display areas. The fingerprint recognition unit shares the display area space, allowing it to be integrated into the screen region rather than occupying separate non-display area, thus improving screen-to-body ratio while maintaining fingerprint recognition functionality
Solution Approach 2:
The light-emitting units in the display area serve dual purposes: they function as display elements and simultaneously serve as light sources for the fingerprint recognition unit. This multi-functionality eliminates the need for separate lighting systems and allows the fingerprint recognition to utilize existing display infrastructure, improving overall space utilization
2Reliability
If the user needs to touch the fingerprint recognition unit intentionally for rights verification, then the fingerprint recognition is performed, but the user experience is affected
Solution Approach 1:
The system enables automatic fingerprint recognition by capturing images when the user naturally touches or approaches the screen during normal interaction. The fingerprint recognition unit operates autonomously without requiring intentional user action, as it detects fingerprints during regular touch interactions with the display area, thereby improving ease of operation while maintaining security
3Area of stationary object
If the light-emitting units serve as light sources for fingerprint recognition, then the screen-to-body ratio is improved, but the fingerprint recognition accuracy may be affected by inconsistent luminous flux
Solution Approach 1:
The patent applies different configuration parameters to different light-emitting units based on their specific positions and roles. Light-emitting units functioning as display elements have different characteristics from those serving as fingerprint recognition light sources. This localized optimization ensures that each unit is tuned for its primary function, maintaining fingerprint recognition accuracy while utilizing the display area effectively
Solution Approach 2:
The system adjusts configuration parameters of light-emitting units based on their dual functionality. By modifying parameters such as emission intensity, wavelength, or timing for units serving as fingerprint light sources versus display elements, the system compensates for variations in luminous flux and ensures consistent fingerprint recognition performance across different display regions
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 configuration enhances fingerprint recognition accuracy by ensuring the fingerprint recognition units receive consistent luminous flux and reduces errors, while also increasing the screen-to-body ratio, aligning with the trend towards narrower bezels and improved user experience.
Implementation Method 1
a plurality of light-emitting units located in the display area of the substrate; The plurality of light-emitting units includes a plurality of first light-emitting units configured to emit first color light, a plurality of second light-emitting units configured to emit second color light, and a plurality of third light-emitting units configured to emit third color light
Implementation Method 2
the plurality of first fingerprint recognition units and the plurality of second fingerprint recognition units have different configuration parameters for detecting an electric signal value with respect to a reflector
Data Source
AI summary
An array substrate, a display panel and a display device are provided. The array substrate includes a substrate; a plurality of light-emitting units, which are in the display area of the substrate and include emission colors: a first color, a second color and a third color, where a light transmittance of the first color and a light transmittance of the second color are both greater than a light transmittance of the third color; and a plurality of first fingerprint recognition units and a plurality of second fingerprint recognition units, which are in the display area of the substrate. Each light-emitting unit serves as a light source of each fingerprint recognition unit, and each first fingerprint recognition unit and each second fingerprint recognition unit have different configuration parameters so as to detect a same electric signal value with respect to a reflector.