In-Cell Optical Fingerprint Display Merging Sensor and Panel
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Solution Overview
Problem
Conventional fingerprint identification displays face challenges with increased thickness and cost due to the use of Add-On or On-Cell methods, which are not suitable for full-panel implementations.
Innovation Solution
An in-cell type optical fingerprint identification display that utilizes the display panel's light source for detection, allowing the display to operate in both fingerprint detection and normal display modes, reducing thickness and cost by integrating fingerprint sensing into the display panel itself.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Add-On or On-Cell method is used for fingerprint identification display, then fingerprint detection function is achieved, but display thickness increases and display cost increases
Solution Approach 1:
The patent combines the fingerprint sensor and display panel into a single integrated structure. The fingerprint sensor is formed within the display panel structure itself, merging two previously separate components (fingerprint sensor and display) into one unified device, thereby achieving fingerprint detection without increasing display thickness
Solution Approach 2:
The display panel structure is designed to serve multiple functions: it acts as both the display medium and the fingerprint sensing structure. The same pixel structure is used for both light emission/display and optical fingerprint detection, making the display panel a multi-functional component that eliminates the need for separate fingerprint sensor modules
2Reliability
If Add-On or On-Cell method is used for fingerprint identification display, then fingerprint detection function is achieved, but display cost increases
Solution Approach 1:
By merging the fingerprint sensor and display panel into a single integrated structure, the patent eliminates the need for separate fingerprint sensor modules and their associated assembly processes. This consolidation reduces manufacturing steps, assembly complexity, and overall production costs while maintaining fingerprint detection functionality
Solution Approach 2:
The integrated pixel structure serves dual purposes: display and fingerprint sensing. This multi-functionality reduces the total component count and manufacturing complexity, as the same structural elements are used for both functions, thereby lowering overall display costs
3Reliability
If Add-On or On-Cell method is used for fingerprint identification display, then fingerprint detection is possible, but full-panel fingerprint identification display cannot be implemented
Solution Approach 1:
The patent divides the display panel into multiple pixel units, where each pixel contains both display elements and fingerprint sensing elements. This segmentation allows the fingerprint detection function to be distributed across the entire display panel area, enabling full-panel fingerprint identification rather than being limited to specific regions
4Reliability
If separate fingerprint sensor is attached on display, then fingerprint detection function is achieved, but device complexity increases
Solution Approach 1:
The patent merges the fingerprint sensor and display panel into a single integrated structure, eliminating the need for separate fingerprint sensor modules. This consolidation reduces structural complexity by removing redundant components and simplifying the overall device architecture
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
Enables fingerprint detection at any position on the display with reduced thickness and cost, maintaining normal display functionality during fingerprint detection without the need for a separate touch panel.
Implementation Method 1
The pixel includes at least one subpixel which emits light on the basis of a first signal received from the processor
Implementation Method 2
an optical sensor which receives the light emitted from the subpixel and is reflected from a fingerprint and generates a second signal
Data Source
AI summary
The present disclosure related to an optical fingerprint identification display and a driving method thereof. In the optical fingerprint identification display and the driving method thereof, the fingerprint identification display includes: a display panel and a processor. The display panel includes a plurality of pixels arranged in a two-dimensional matrix. The pixel includes: at least one subpixel which emits light on the basis of a first signal received from the processor; and an optical sensor which receives the light emitted from the subpixel and is reflected from a fingerprint and generates a second signal. The processor determines a touch region on the display panel, and transmits the first signal to one or more pixels included in the touch region, and identifies the fingerprint of the user on the basis of the second signal received from the pixel.