Optical Fingerprint Layer Integration in Full-Screen Mobile Displays
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Solution Overview
Problem
Existing mobile terminal designs with high screen-to-body ratios face challenges in providing effective full-screen fingerprint recognition, leading to poor user experience due to unconventional placement of fingerprint recognition modules, such as on the back or side bezels, or limited recognition areas on the screen.
Innovation Solution
A display module with an optical fingerprint sensitive layer made of transparent conductive material, integrated between a screen cover plate and a display component, allowing light emitted by the display to pass through and reflect off a finger to calculate fingerprint patterns, enabling full-screen fingerprint identification without altering the phone's dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the fingerprint recognition module is arranged in the backside or side bezel to maintain high screen-to-body ratio, then the screen area is increased, but the user experience deteriorates due to poor ergonomics
Solution Approach 1:
The patent merges the fingerprint recognition module with the display screen by integrating it into the optically compensating film layer. This allows the fingerprint recognition function to be combined with the display function, enabling full-screen fingerprint recognition while maintaining the high screen-to-body ratio without compromising user experience
Solution Approach 2:
The optically compensating film layer is given multiple functions: it serves both as an optical compensation component for the display and as the substrate for the fingerprint recognition module. This multi-functionality allows the same component to support both display quality and fingerprint recognition capabilities across the entire screen
2Area of stationary object
If the fingerprint recognition module is placed underneath a fixed fingerprint recognition area on the screen, then the screen-to-body ratio is maintained, but full-screen fingerprint recognition capability is lost
Solution Approach 1:
The fingerprint recognition module is designed to cover the entire screen area rather than being limited to a fixed region. The optically compensating film layer with integrated fingerprint recognition electrodes extends across the full screen, allowing users to perform fingerprint recognition at any location on the screen surface
Solution Approach 2:
The patent transitions from a localized fingerprint recognition area to a full-screen area by integrating the recognition function into the optically compensating film layer that spans the entire display. This dimensional expansion allows fingerprint recognition to occur across the whole screen surface
3Adaptability or versatility
If a transparent conductive material is used for the optical fingerprint sensitive layer, then full-screen fingerprint recognition is enabled, but the manufacturing complexity increases
Solution Approach 1:
The patent combines the fingerprint recognition electrodes with the optically compensating film layer structure. The transparent conductive material is integrated into the existing optically compensating film manufacturing process, reducing the need for separate manufacturing steps and minimizing additional manufacturing complexity
Solution Approach 2:
The patent uses transparent conductive materials that can be deposited using standard thin-film fabrication techniques. By selecting materials and methods compatible with existing display manufacturing processes, the patent achieves full-screen fingerprint recognition while keeping manufacturing complexity manageable
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 solution enhances user experience by allowing full-screen fingerprint recognition on high screen-to-body ratio mobile terminals, improving usability and maintaining the aesthetic appeal of full-screen designs.
Implementation Method 1
part of the light is reflected to the sensitive surface of the optical fingerprint sensitive layer by a finger pressed on the screen cover plate
Data Source
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AI summary
A display module and a mobile terminal are provided. The display module includes: a screen cover plate, a fingerprint sensitive component, and a display component; the fingerprint sensitive component is arranged between the screen cover plate and the display component; the fingerprint sensitive component includes: an optical fingerprint sensitive layer made of transparent conductive material, a sensitive surface thereof having multiple pixels; the sensitive surface is attached to a surface of the screen cover plate, a attaching surface of the optical fingerprint sensitive layer is attached to a display surface of the display component; when the display component is on, the light emitted passes through the fingerprint sensitive component towards the screen cover plate, and is reflected to the sensitive surface by a finger pressed on the screen cover plate, the fingerprint sensitive component derives a pattern of a fingerprint from the amount of light received by pixels.