Infrared Pixel Integration for Full-Screen Fingerprint Recognition
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Solution Overview
Problem
Current AMOLED panels in mobile devices require additional backlight or micro LEDs for fingerprint recognition, complicating assembly and hindering the recognition of fingerprints or palmprints across the full screen, which increases weight and reduces portability.
Innovation Solution
Incorporating near-infrared organic light-emitting diodes and photosensitive diodes between pixel units on a base substrate, with overlapping emission and absorption spectra, allowing for fingerprint recognition throughout the screen without additional light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional backlight or micro LED is arranged separately for fingerprint recognition, then fingerprint recognition capability is improved, but device complexity and weight increase
Solution Approach 1:
The patent combines the fingerprint recognition light source function with the display pixel units by using the display pixels themselves as the infrared light sources. This integration eliminates the need for separate backlight or micro LED arrangements, thereby reducing device complexity and simplifying the assembling process while maintaining fingerprint recognition capability.
Solution Approach 2:
The patent makes the display pixel units serve dual functions: normal display operation and fingerprint recognition light source. By configuring pixel units to emit infrared light when needed, the display system becomes multi-functional, eliminating the need for dedicated fingerprint recognition components and reducing overall device complexity.
2Reliability
If additional backlight or micro LED is arranged separately for fingerprint recognition, then fingerprint recognition capability is improved, but device weight increases
Solution Approach 1:
The patent merges the fingerprint recognition light source function into the existing display pixel units, eliminating the need for separate heavy components like backlights or micro LED arrays. This integration significantly reduces the additional weight that would be introduced by separate fingerprint recognition lighting systems.
Solution Approach 2:
The display pixel units are configured to serve multiple purposes: normal display function and infrared light emission for fingerprint recognition. This multi-functionality eliminates the need for dedicated weight-bearing components for fingerprint recognition, thereby reducing overall device weight.
3Measurement precision
If traditional separate light source arrangement is used, then fingerprint recognition in fixed area is achieved, but full-screen fingerprint recognition is hindered
Solution Approach 1:
The patent divides the light source function across multiple pixel units distributed throughout the entire display screen. Each pixel unit can independently emit infrared light, and collectively they provide full-screen coverage for fingerprint recognition, enabling both high precision and broad adaptability.
Solution Approach 2:
The patent transitions from localized fingerprint recognition to full-screen coverage by utilizing the two-dimensional array of pixel units across the entire display surface. This dimensional expansion allows infrared light to be emitted from multiple locations simultaneously, enabling fingerprint recognition anywhere on the screen while maintaining measurement precision.
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
Enables efficient fingerprint recognition across the entire screen while simplifying assembly and reducing device weight by integrating recognition components within the display panel, maintaining the panel's flexibility and normal display operation.
Implementation Method 1
a plurality of infrared light sources and a plurality of infrared photosensitive sensors distributed between the plurality of pixel units
Implementation Method 2
an overlapping spectrum exists between an emission spectrum of each of the plurality of infrared light sources, and an absorption spectrum of each of the plurality of infrared photosensitive sensors
Data Source
AI summary
The disclosure discloses a display panel and a display device to thereby extend an area for recognizing a fingerprint or a palmprint instead of only a fixed area in which a fingerprint can be recognized as in the related art, so as to recognize a fingerprint or a palmprint throughout the screen while improving the precision of recognizing light rays. The display panel according to the disclosure includes: a base substrate; and, infrared light sources, pixel units, and infrared photosensitive sensors on the base substrate.