Self-Luminous Display Pixels With Integrated Full-Area Fingerprint Sensing
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Solution Overview
Problem
Existing electronic devices with integrated fingerprint sensors require external modules, increasing production costs and complexity, and limit fingerprint recognition to partial areas, making them inconvenient to use.
Innovation Solution
An electronic device with integrated self-luminous pixels and sensing units, utilizing a first and second driving unit to switch between display and sensing modes, allowing for seamless integration of fingerprint recognition without external modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external fingerprint module is bonded to the edge of the electronic device, then fingerprint recognition function is achieved, but production costs and complexity increase
Solution Approach 1:
The patent merges the fingerprint sensing function with the display pixel structure by integrating a sensing unit into each pixel. The sensing unit includes a sensing electrode and a sensing transistor that share the same pixel structure, allowing the display and fingerprint sensing functions to be combined in a single integrated device rather than using separate external modules.
Solution Approach 2:
The pixel structure is designed to perform multiple functions: it can display images through the display unit and simultaneously perform fingerprint sensing through the integrated sensing unit. The sensing unit and display unit share common structures such as the substrate and transistor components, enabling one pixel to serve dual purposes.
2Reliability
If an external fingerprint module is bonded to the edge of the electronic device, then fingerprint recognition function is achieved, but production costs increase
Solution Approach 1:
The patent merges the fingerprint sensing function with the display pixel structure by integrating a sensing unit into each pixel. The sensing unit includes a sensing electrode and a sensing transistor that share the same pixel structure, allowing the display and fingerprint sensing functions to be combined in a single integrated device rather than using separate external modules.
Solution Approach 2:
The display device serves itself by incorporating the fingerprint sensing capability within the existing pixel structure. The sensing unit utilizes the same substrate and transistor infrastructure as the display unit, eliminating the need for separate external fingerprint modules and reducing dependency on outsourced components.
3Device complexity
If fingerprint recognition is limited to partial areas, then external module bonding is simplified, but user convenience decreases
Solution Approach 1:
The patent divides the display into multiple pixels, and each pixel contains an integrated sensing unit. This segmentation allows the fingerprint sensing function to be distributed across all pixels rather than concentrated in a single external module, enabling full-area fingerprint recognition while maintaining manageable device architecture.
Solution Approach 2:
The patent transitions from edge-based fingerprint recognition (one-dimensional location) to full-display-area fingerprint recognition (two-dimensional coverage). By integrating sensing units into pixels across the entire display surface, the system expands the fingerprint recognition area from a limited edge region to the complete display area.
Data Source
AI summary
An electronic device includes a substrate, pixels, a second sensing unit, a first driving unit and a second driving unit. Each pixel includes a display unit including a self-luminous element and a first sensing unit. The second sensing unit overlaps at least one of the pixels. In a first mode, the first driving unit outputs a first signal to the display unit. In a second mode, the first driving unit outputs a second signal to the second sensing unit, receives a third signal from the second sensing unit, and outputs a fourth signal to the second driving unit according to the third signal. In a third mode, the second driving unit outputs a fifth signal to the first sensing unit according to the fourth signal, and the first sensing unit transmits a sixth signal to the first driving unit.