Display Component Optical Fingerprint Identification Structure
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Solution Overview
Problem
Current fingerprint identification devices have low accuracy and a redundant, complex structure when attempting to integrate fingerprint identification and touch control functions.
Innovation Solution
A display component with a display panel, photosensitive elements, and control elements above a packaging film, utilizing optical diffuse reflection to differentiate fingerprint ridges and valleys for accurate identification, while also incorporating touch control electrodes for position information, simplifying the structure to achieve both functions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fingerprint identification and touch control functions are integrated using conventional structures, then both functions can be provided, but the structure becomes redundant and complex
Solution Approach 1:
The patent combines fingerprint identification and touch control functions into a single integrated structure. The photosensitive element serves dual purposes: detecting reflected light for fingerprint identification and responding to touch pressure for touch control. The control element and common electrode structure is shared between both functions, eliminating redundant components and simplifying the overall device architecture while maintaining both functionalities.
Solution Approach 2:
The photosensitive element is designed to perform multiple functions simultaneously. It detects optical signals for fingerprint recognition and mechanical pressure for touch control input. The control element and electrode structure serve both fingerprint sensing and touch control purposes, making each component multi-functional rather than dedicated to a single function, thereby reducing overall device complexity.
2Measurement precision
If conventional fingerprint identification structures are used, then fingerprint identification can be performed, but accuracy is low
Solution Approach 1:
The patent implements local quality by providing control elements and photosensitive elements at specific locations above each pixel structure. This localized arrangement ensures that fingerprint detection and touch control functions are precisely aligned with the display pixel regions, improving measurement accuracy for both functions while avoiding the need for complex full-coverage structures.
Solution Approach 2:
The packaging film serves as an intermediary layer between the display panel and the photosensitive elements. It provides a stable mounting surface for the control and photosensitive elements while allowing optical signals to pass through for fingerprint detection. This intermediary structure simplifies the overall design by providing a unified platform for both display and sensing functions.
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
The solution enables accurate fingerprint identification and touch control with a simplified structure, improving the accuracy and functionality of fingerprint identification devices.
Implementation Method 1
utilizing optical diffuse reflection to differentiate fingerprint ridges and valleys for accurate identification
Implementation Method 2
the photosensitive element performs fingerprint identification according to received reflection light reflected by a finger after being emitted by the display panel
Data Source
AI summary
The present application belongs to the field of display technology, more particularly, relates to a display component and a display device. The display component comprises a display panel having a plurality of pixel structures. A packaging film is provided above the display panel. In each of the pixel structures, a control element and a photosensitive element connected with the control element are provided above the packaging film. The photosensitive element performs fingerprint identification according to received reflection light reflected by a finger after being emitted by the display panel. The display component implements optical fingerprint identification based on the display panel. By providing the photosensitive elements and respective control elements above the packaging film, accurate fingerprint identification is implemented.