Monochromatic Green Light Fingerprint Collection Screen Longevity
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Solution Overview
Problem
The frequent use of fingerprint functions on mobile phones reduces the service life of their screens, particularly due to the blue light-emitting materials which have the shortest lifespan, affecting both the longevity and quality of fingerprint collection.
Innovation Solution
Implementing a terminal device with an application processor controlling the touch display screen to emit monochromatic light, specifically green light, which has the longest service life and provides higher brightness for fingerprint collection, thereby balancing screen longevity and fingerprint quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the touch display screen emits blue light for fingerprint collection, then the fingerprint collection function is achieved, but the service life of the screen decreases
Solution Approach 1:
The patent changes the light wavelength parameter from blue light (shorter wavelength, shorter lifespan) to green light (longer wavelength, longer lifespan). The application processor controls the touch display screen to emit monochromatic green light during fingerprint collection, which has a longer service life while still enabling effective fingerprint imaging through the optical fingerprint sensor.
2Reliability
If the touch display screen uses multiple light-emitting materials for full-color display, then the display quality is improved, but the service life decreases due to blue light material degradation
Solution Approach 1:
The patent extracts only the green light-emitting function from the multi-color display system during fingerprint collection. The application processor controls the touch display screen to emit only monochromatic green light, excluding blue and red light components. This selective extraction uses the green light-emitting material which has a longer service life, while still providing sufficient brightness for fingerprint imaging.
3Productivity
If the optical fingerprint sensor collects fingerprint images frequently, then the fingerprint function usability is improved, but the screen degradation accelerates
Solution Approach 1:
The patent changes the operating parameter of the light emission from blue light to green light. By controlling the touch display screen to emit monochromatic green light during fingerprint collection, the system enables frequent fingerprint collection operations while using the green light-emitting material which degrades more slowly, thus extending the overall service life of the screen even with high usage frequency.
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 extends the service life of the mobile phone screen while maintaining high-quality fingerprint collection by using green light, which is less contained in skin color and has a longer lifespan than red or blue light.
Implementation Method 1
The optical fingerprint sensor utilizes the principle of refraction and reflection of light
Implementation Method 2
The optical fingerprint sensor utilizes the principle of refraction and reflection of light
Implementation Method 3
Light-emitting units of a touch display screen are controlled to emit monochromatic light
Data Source
AI summary
A method for fingerprint collection and related products are provided. The method includes the following. Light-emitting units of a touch display screen are controlled to emit monochromatic light. The monochromatic light is configured to illuminate a fingerprint of a user. Collect the fingerprint of the user illuminated by the monochromatic light.