Display device
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Solution Overview
Problem
Existing display devices face challenges in efficiently integrating fingerprint and illuminance sensing capabilities while maintaining optimal performance and minimizing interference between sensor driving circuits.
Innovation Solution
A display device design that includes separate fingerprint and illuminance sensing areas with distinct sensor driving circuits, utilizing insulated and interconnected reset control lines to manage electrical connections, and employing a bridge line and contact holes for electrical connection between layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate sensor driving circuits are used for fingerprint and illuminance sensors, then sensor operation independence is improved, but device complexity increases
Solution Approach 1:
The patent divides the sensor system into separate fingerprint sensing area and illuminance sensing area, each with its own driving circuit (first sensor driving circuit and second sensor driving circuit). This segmentation allows independent operation of each sensor type while maintaining modular architecture that manages complexity through functional separation.
Solution Approach 2:
The patent employs a unified sensor structure where both fingerprint and illuminance sensors share the same basic sensor element design and are integrated within the same display device architecture. This multi-functionality approach allows the device to perform multiple sensing functions without requiring entirely separate systems, thereby managing complexity.
2Ease of manufacture
If reset control lines are electrically connected across different sensor circuits, then manufacturing simplicity is improved, but signal interference increases
Solution Approach 1:
The patent introduces an insulating layer as an intermediary between the first and second reset control lines. This insulating layer physically separates the control lines while allowing them to be formed in the same manufacturing process, thereby preventing signal interference without complicating the manufacturing procedure.
Solution Approach 2:
The patent applies electrical insulation selectively only where the first and second reset control lines intersect or come into contact, rather than insulating all control lines throughout the entire device. This localized insulation approach prevents signal interference at critical points while maintaining manufacturing simplicity and avoiding unnecessary complexity in non-critical areas.
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 independent and efficient operation of fingerprint and illuminance sensors, reducing interference and enhancing overall sensor performance and usability.
Implementation Method 1
a first light sensing element in the fingerprint sensing area
Implementation Method 2
a second light sensing element in the illuminance sensing area
Data Source
AI summary
A display device includes a base layer on which a display area including and a non-display area are defined, a circuit layer on the base layer, and an element layer on the circuit layer and including a light emitting element on the display area, a first light sensing element, and a second light sensing element, wherein the circuit layer includes a pixel driving circuit connected to the light emitting element, a plurality of first reset control lines connected to the first sensor driving circuit, extending in a first direction, arranged in a second direction, and a plurality of second reset control lines connected to the second sensor driving circuit, extending in the first direction, arranged in the second direction, and the plurality of first reset control lines and the plurality of second reset control lines are electrically insulated from each other.