Fingerprint Identification Structure Using Light Energy Switch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional in-screen fingerprint identification structures increase the thickness and cost of display panels due to the presence of a fingerprint module.
Innovation Solution
A fingerprint identification structure incorporating a light energy switch and a thermosensitive light path adjustment structure, which uses light and temperature differences to identify fingerprint ridges without a physical module, similar to a TFT device, allowing integration into the display panel for reduced thickness and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fingerprint module is attached under the screen for in-screen fingerprint identification, then fingerprint recognition function is achieved, but the thickness of the display panel is increased
Solution Approach 1:
The patent merges the fingerprint identification function with the display panel structure by integrating the light source, light guide layer, and temperature sensing elements directly into the display panel layers. This combination eliminates the need for a separate attached fingerprint module, achieving in-screen fingerprint recognition while maintaining thin panel thickness.
Solution Approach 2:
The display panel structure is designed to serve multiple functions: the light guide layer not only guides display light but also serves as a light source for fingerprint illumination; the temperature sensing elements detect both display panel temperature and fingerprint ridge temperature. This multi-functionality eliminates the need for separate fingerprint module components.
2Reliability
If a fingerprint module is attached under the screen, then fingerprint recognition function is achieved, but the manufacturing cost is increased
Solution Approach 1:
The patent combines fingerprint identification components with existing display panel structures, including the light guide layer, polarizing film, and temperature sensing elements. This integration eliminates the need for separate fingerprint module manufacturing and assembly processes, reducing overall manufacturing cost while maintaining fingerprint recognition functionality.
Solution Approach 2:
Existing display panel components are designed to serve dual purposes: the light guide layer provides both display illumination and fingerprint illumination; the temperature sensing elements monitor both panel temperature and fingerprint temperature for ridge detection. This multi-functionality reduces the need for additional specialized components, lowering manufacturing costs.
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 enables a thinner and less costly fingerprint identification system that can be integrated into display panels, reducing manufacturing costs and thickness while maintaining effective fingerprint recognition.
Implementation Method 1
a refractive index of the light selective transmission layer is less than a refractive index of the light transmission layer
Implementation Method 2
the light direction control layer disposed on the light transmission layer and configured to receive the heat source and control a reflection direction of the light under effect of the heat source
Implementation Method 3
the light energy switch comprises a semiconductor layer, a source electrode, and a drain electrode; an upper surface of the semiconductor layer connected to the thermosensitive light path adjustment structure, and configured to convert from a semiconductor state thereof into a conductor state thereof under light irradiation
Implementation Method 4
the thermosensitive light path adjustment structure connected to a surface of the light energy switch, capable of transmitting light internally, configured to adjust a light path of light to prevent the light from irradiating the light energy switch when receiving no heat source, and configured to adjust the light path of the light to drive the light to irradiate the light energy switch when receiving a heat source; wherein the heat source is a temperature of a fingerprint ridge
Data Source
AI summary
A fingerprint identification structure and a display panel are disclosed. display panel includes a fingerprint identification structure. The fingerprint identification structure includes a light energy switch and a thermosensitive light path adjustment structure. The light energy switch is configured to switch from an open circuit to a closed circuit under light irradiation. The thermosensitive light path adjustment structure is connected to a surface of the light energy switch, is able to transmit light internally, and is configured to adjust a light path of light to drive the light to irradiate the light energy switch when receiving a heat source.