Fingerprint Identification Unit Group for Display Panel Signal Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fingerprint identification processes in display panels suffer from inaccurate results due to the small signal difference between light signals reflected from fingerprint valleys and ridges, affecting precision and efficiency.
Innovation Solution
A display panel design incorporating a fingerprint identification unit group with a first and second fingerprint identification unit, where the first unit adjusts sub-pixel luminance from a first to a second luminance, and the second unit performs identification using light emitted at the second luminance, enhancing the signal difference between fingerprint valley and ridge reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fingerprint identification element is disposed in the display panel to perform fingerprint identification, then the display device can implement fingerprint identification function, but the signal difference between light signals reflected from fingerprint valleys and ridges is small, resulting in inaccurate identification results
Solution Approach 1:
The first fingerprint identification unit performs preliminary action by adjusting the luminance of sub-pixels before the actual fingerprint identification. Specifically, it increases the luminance of sub-pixels corresponding to fingerprint valleys relative to those corresponding to fingerprint ridges, thereby amplifying the light signal difference before the second fingerprint identification unit performs the actual identification, which resolves the problem of small signal difference
Solution Approach 2:
The first fingerprint identification unit acts as an intermediary between the light source and the second fingerprint identification unit. It modifies the light emission characteristics of sub-pixels to enhance the contrast between fingerprint valleys and ridges, serving as a mediator that transforms the insufficient signal difference into a usable identification signal
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 design significantly improves the accuracy of fingerprint identification by amplifying the light signal difference between fingerprint valleys and ridges, leading to more precise identification results.
Implementation Method 1
The at least one first fingerprint identification unit is configured to adjust, in a first fingerprint identification phase, the at least one sub-pixel, electrically connected to the first fingerprint identification unit, from a first luminance to a second luminance
Implementation Method 2
The second fingerprint identification unit is configured to perform, in a second fingerprint identification phase, a fingerprint identification according to light emitted by the at least one sub-pixel at the second luminance and reflected by a touch subject
Data Source
AI summary
Provided are a display panel and a driving method of a display panel. The display panel includes a substrate, a sub-pixel array located on the substrate, and at least one fingerprint identification unit group; each of the at least one fingerprint identification unit group includes a first fingerprint identification unit and a second fingerprint identification unit; the first fingerprint identification unit, which is in the fingerprint identification unit group to which the second fingerprint identification unit belongs, is electrically connected to the pixel circuit of at least one sub-pixel which is peripheral to the second fingerprint identification unit; the first fingerprint identification unit is configured to adjust, in a first fingerprint identification phase, the at least one sub-pixel electrically connected to the first fingerprint identification unit from a first luminance to a second luminance.