Fingerprint Detection Touch Control Display Apparatus
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Solution Overview
Problem
Current fingerprint recognition methods in display technology face challenges in accurately differentiating ridge lines from valley lines on a touch object, particularly in enhancing sensitivity and accuracy for fingerprint detection.
Innovation Solution
A fingerprint detection touch control display apparatus is designed with a base substrate and counter substrate, featuring invisible light emitting elements, driving circuits, light shields, and invisible light sensors. The apparatus emits light towards the counter substrate, with a via extending through the light shield to detect light reflected by a touch object, allowing for precise fingerprint information detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If total reflection method is used for fingerprint detection, then the structure is simple, but the sensitivity and accuracy in differentiating ridge lines from valley lines is insufficient
Solution Approach 1:
The patent combines multiple detection methods (total reflection method and invisible light detection method) into a single integrated detection system. The invisible light emitting element and invisible light sensor are integrated with the display pixel structure, allowing simultaneous implementation of both detection approaches to improve fingerprint recognition accuracy while maintaining structural simplicity.
Solution Approach 2:
The patent introduces an invisible light emitting element as an intermediary to provide illumination for the fingerprint detection process. This intermediary component enables the invisible light sensor to detect reflected light from the fingerprint, thereby improving the sensitivity and accuracy of ridge and valley line differentiation without significantly increasing overall system complexity.
2Measurement precision
If invisible light emitting element and invisible light sensor are added to enhance detection accuracy, then fingerprint detection accuracy is improved, but device complexity increases
Solution Approach 1:
The invisible light emitting element and invisible light sensor are designed to serve multiple functions: they provide illumination for fingerprint detection and simultaneously enable reflected light detection. This multi-functionality allows the system to achieve improved detection accuracy without proportionally increasing device complexity, as the same components perform multiple detection tasks.
Solution Approach 2:
The patent implements a nested structure where the invisible light emitting element and invisible light sensor are integrated within the display pixel structure. The detection components are embedded in the same substrate and share common structural elements, allowing the detection system to be nested within the existing display architecture rather than adding separate external components.
3Measurement precision
If light shield is used to minimize interference, then detection accuracy is improved, but light transmission efficiency decreases
Solution Approach 1:
The light shield is designed with local quality by creating a via structure that provides selective light transmission. The light shield blocks light in most areas to prevent interference, but contains localized openings (vias) that allow light to pass through to the invisible light sensor. This local quality approach minimizes interference while maintaining sufficient light transmission efficiency for accurate detection.
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 solution enhances sensitivity and accuracy in fingerprint detection by maximizing light reflection and minimizing interference, enabling effective differentiation of ridge and valley lines, thus improving the overall fingerprint recognition process.
Implementation Method 1
each of the plurality of touch sensors comprises an invisible light emitting element; a driving circuit configured to driving light emmission of the invisible light emitting element
Implementation Method 2
at least a portion of the light being reflected by a touch object on the counter substrate into the invisible light sensor through a via extending through the light shield
Implementation Method 3
the invisible light sensor is configured to detect the portion of the light, thereby detecting a fingerprint information
Data Source
AI summary
A fingerprint detection touch control display apparatus. The fingerprint detection touch control display apparatus includes a base substrate; a plurality of touch sensors on the base substrate; and a counter substrate facing the base substrate. Each of the plurality of touch sensors includes an invisible tight emitting element; a driving circuit configured to driving light emission of tire divisible light emitting element; an invisible light sensor; and a light shield. The invisible light emitting element is configured to emit light toward the counter substrate, at least a portion of the light being reflected by a touch object on the counter substrate into the invisible light sensor through a via extending through the light shield. The invisible light sensor is configured to detect tire portion of the light, thereby detecting a fingerprint information.