Fingerprint Driver Layout for Pixel-Preserving Display Panels
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Solution Overview
Problem
Display devices face a challenge in accommodating both display pixels and light sensing pixels without reducing the space allocated for display pixels, as both types of pixels are typically required for fingerprint authentication.
Innovation Solution
The display device integrates light sensing pixels with light receiving elements in the display area and their corresponding fingerprint drivers in the non-display area, utilizing transistors strategically placed in both areas to facilitate fingerprint authentication without reducing the space for display pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light sensing pixels are arranged in the display panel together with display pixels, then fingerprint authentication capability is achieved, but the space for display pixels is reduced
Solution Approach 1:
The display panel is segmented into a display area and a non-display area. Light sensing pixels are placed in the non-display area, separating them from display pixels spatially. This segmentation allows both display pixels and light sensing pixels to coexist without competing for the same space, resolving the contradiction between achieving fingerprint authentication capability and maintaining display pixel space.
Solution Approach 2:
The patent utilizes the spatial dimension by extending the pixel arrangement from the display area into the non-display area. By placing light sensing pixels in the non-display area (a different spatial zone), the patent creates additional space for fingerprint authentication without encroaching on the display pixel area, effectively using dimensional separation to resolve the space conflict.
2Adaptability or versatility
If light sensing pixels are arranged in the display area, then fingerprint authentication is enabled, but the display area is reduced
Solution Approach 1:
The light sensing pixels are extracted from the display area and relocated to the non-display area. This extraction removes the conflicting element (light sensing pixels) from the display area, allowing the display area to maintain its full size while the fingerprint authentication function is preserved in the non-display area through the remaining light sensing pixels and their associated fingerprint drivers.
3Adaptability or versatility
If space is allocated for both display pixels and light sensing pixels in the display panel, then dual functionality is achieved, but the overall panel complexity increases
Solution Approach 1:
The patent merges the display panel structure with the fingerprint sensing function by integrating light sensing pixels and fingerprint drivers into the non-display area of the same panel. This consolidation allows dual functionality (display and fingerprint authentication) to be achieved within a single integrated structure, avoiding the need for separate components and thereby reducing overall system complexity despite the increased dual functionality.
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 configuration allows for effective fingerprint authentication without compromising the space allocated for display pixels, ensuring optimal performance of both display and authentication functions.
Implementation Method 1
An optical method can authenticate a user's fingerprint by detecting light reflected from the user's fingerprint
Data Source
AI summary
A display device includes a substrate that includes a display area that displays an image and a non-display area disposed around the display area, display pixels that each include a light emitting element disposed in the display area and a pixel driver connected to the light emitting element, and light sensing pixels that each include a light receiving element and a fingerprint driver connected to the light receiving element. The fingerprint driver includes at least one transistor, the light receiving element is disposed in the display area, and the at least one transistor of the fingerprint driver is disposed in the non-display area.