Integrated Fingerprint Electrode on Display Substrate
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Solution Overview
Problem
Conventional full-screen fingerprint recognition methods increase the thickness and manufacturing cost of display apparatuses and require complex light collimating structures, making them undesirable for integration in display technology.
Innovation Solution
A display substrate with integrated fingerprint recognition structures, including a control circuit and fingerprint recognition electrode, arranged parallel to the base substrate, utilizing a transparent electric-conductive oxide film layer with an antireflection function and a mesh-like shielding pattern to minimize thickness and optical interference, allowing for full-screen fingerprint recognition without significant thickness increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an independent fingerprint recognition sensor is attached to the back or front face of the screen module, then fingerprint recognition function is achieved, but the module thickness increases
Solution Approach 1:
The patent merges the fingerprint recognition electrode with the display substrate by integrating it into the same plane as the sub-pixel driving circuits. The fingerprint recognition structure is formed on the base substrate alongside the display elements, eliminating the need for separate attachment and reducing overall module thickness while maintaining fingerprint recognition functionality.
2Reliability
If an independent fingerprint recognition sensor is attached to the back or front face of the screen module, then fingerprint recognition function is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines the fingerprint recognition structure with the display substrate manufacturing process. Both the display elements and fingerprint recognition electrodes are formed on the same base substrate using integrated fabrication steps, eliminating the need for separate assembly processes and reducing manufacturing costs.
3Reliability
If In Cell optical mode integration is used, then fingerprint recognition function is achieved, but complex optical path design such as collimating structure is required
Solution Approach 1:
The patent replaces the complex optical system (collimating structures, optical paths) with a direct electrical field-based capacitive sensing approach. The fingerprint recognition electrode directly detects capacitance changes caused by fingerprint contact, eliminating the need for optical components and simplifying the overall structure.
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 full-screen fingerprint recognition at any position with a maximum screen-to-body ratio, reducing manufacturing costs and eliminating the need for complex optical designs, while maintaining a lightweight and thin display substrate.
Implementation Method 1
the fingerprint recognition electrode includes an electric-conductive film layer having an antireflection function
Data Source
AI summary
A display substrate and a display apparatus are provided. The display substrate includes: a base substrate; a plurality of sub-pixels arranged on the base substrate, wherein the sub-pixels each include a sub-pixel driving circuit; a plurality of fingerprint recognition structures arranged on the base substrate, wherein the fingerprint recognition structures each include a control circuit and a fingerprint recognition electrode, the fingerprint recognition electrode is located on a side of the control circuit facing away from the base substrate, the control circuit is coupled to the fingerprint recognition electrode, and the control circuit is used for outputting a sensing signal from the fingerprint recognition electrode; wherein the control circuit and the sub-pixel driving circuit are arranged in a direction parallel to the base substrate.