Light Conversion Layer for Iris Recognition
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Solution Overview
Problem
Existing display devices with iris recognition functionality require a separate infrared light source, leading to a complex structure that is not suitable for lightweight and high integration in electronic devices.
Innovation Solution
A display panel with an iris recognition region that includes a light conversion layer capable of converting visible light into infrared light, eliminating the need for a separate infrared light source by emitting infrared light from the display side, utilizing a down-conversion luminescent material doped with rare earth elements such as Er, Yb, Pr, and Tm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate infrared light source is added to the display device, then the iris recognition function is achieved, but the device structure becomes complex and weight increases
Solution Approach 1:
The patent combines the infrared light source function with the display panel by integrating a light conversion layer into the display structure. This layer converts visible light from the display into infrared light, eliminating the need for a separate infrared light source while maintaining the iris recognition function.
Solution Approach 2:
The display panel is designed to serve multiple functions: it displays visual information and simultaneously generates infrared light for iris recognition. The light conversion layer enables the display panel to function as both a display device and an infrared light source, reducing overall device complexity.
2Reliability
If a separate infrared light source is added to the display device, then the iris recognition function is achieved, but the device weight increases
Solution Approach 1:
The patent merges the infrared light source function with the display panel by integrating a light conversion layer into the display structure. This layer converts visible light from the display into infrared light, eliminating the need for a separate infrared light source while maintaining the iris recognition function.
Solution Approach 2:
The display panel is designed to serve multiple functions: it displays visual information and simultaneously generates infrared light for iris recognition. The light conversion layer enables the display panel to function as both a display device and an infrared light source, reducing overall device weight.
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
Simplifies the structure of the display device, reduces weight, and enhances integration by integrating the iris recognition function within the display panel, allowing for successful iris unlocking and authentication processes without additional infrared light sources.
Implementation Method 1
the light conversion layer is configured to convert visible light incident on the light conversion layer into infrared light
Implementation Method 2
a material of the light conversion layer includes a down-conversion luminescent material doped with a rare earth element
Implementation Method 3
the light conversion layer is configured to convert visible light incident on the light conversion layer into infrared light
Data Source
AI summary
Embodiments of the present invention provide a display panel, including a display region, wherein the display region includes an iris recognition region; the display panel further includes a light conversion layer disposed in the iris recognition region, the light conversion layer is configured to convert visible light incident on the light conversion layer into infrared light, and the infrared light is emitted from a display side of the display panel.