Display-Integrated Fingerprint Sensing for Full-Area Recognition
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Solution Overview
Problem
Existing electronic devices with integrated fingerprint sensors face increased production costs and complexity due to the need for external modules and limited fingerprint recognition areas.
Innovation Solution
An electronic device with integrated self-luminous pixels and sensing units, where a first driving unit controls both display and sensing functions, allowing for internal 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 combines the fingerprint sensing function with the display panel by integrating a sensing electrode layer within the display structure itself. The sensing unit is formed by patterned transparent conductive layers (such as ITO) that are incorporated during the display panel manufacturing process, eliminating the need for separate external fingerprint modules and reducing production complexity.
Solution Approach 2:
The display panel is designed to serve multiple functions simultaneously - it acts as both the visual display interface and the fingerprint sensing interface. The same transparent conductive layers that form part of the display structure also function as sensing electrodes for fingerprint recognition, allowing one component to perform multiple roles and reducing overall device complexity.
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 combines the fingerprint sensing function with the display panel by integrating a sensing electrode layer within the display structure itself. The sensing unit is formed by patterned transparent conductive layers (such as ITO) that are incorporated during the display panel manufacturing process, eliminating the need for separate external fingerprint modules and reducing production complexity.
Solution Approach 2:
The display panel is designed to serve multiple functions simultaneously - it acts as both the visual display interface and the fingerprint sensing interface. The same transparent conductive layers that form part of the display structure also function as sensing electrodes for fingerprint recognition, allowing one component to perform multiple roles and reducing overall device complexity.
3Reliability
If an external fingerprint module is used, then fingerprint recognition is achieved, but only partial areas for fingerprint recognition are available
Solution Approach 1:
The sensing area is divided into multiple independent sensing units, each capable of detecting fingerprint patterns. These sensing units are distributed across the display surface, allowing fingerprint recognition to occur at multiple locations rather than being confined to a single edge-mounted module, thereby expanding the effective recognition area.
Solution Approach 2:
The patent transitions from a one-dimensional edge-mounted sensing approach to a two-dimensional area-wide sensing capability by incorporating sensing electrodes across the display surface. This allows fingerprint recognition to occur across multiple locations on the display area, effectively expanding the functional sensing area from a limited edge region to a broader surface area.
Data Source
Figure 1
Figure 2~3A
Figure 3B~4
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.