Display Device Sub-Pixel Arrangement for Biometric Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face challenges in optimizing sensing performance for recognizing biometric information, such as fingerprint or iris scans, due to limitations in light-emitting element configurations and photo-sensing element placement, which affect the accuracy and efficiency of biometric data capture.
Innovation Solution
The display device incorporates a pixel layer with a specific arrangement of light-emitting elements, including sub-light-emitting elements and photo-sensing elements, where the light-emitting elements are configured to maximize space for photo-sensing elements, ensuring optimal sensing performance by adjusting their sizes, shapes, and alignments to enhance biometric data capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light-emitting elements are arranged to maximize space for photo-sensing elements, then sensing performance is improved, but device complexity increases
Solution Approach 1:
The light-emitting element is divided into multiple sub-light-emitting elements (first, second, and third sub-light-emitting elements) within each pixel unit. This segmentation allows the photo-sensing element to be positioned between the second and third sub-light-emitting elements, creating an optimized arrangement that maximizes sensing space while maintaining display functionality. The segmented structure enables precise control of light paths to the photo-sensing element without requiring complete redesign of the pixel architecture.
2Area of stationary object
If photo-sensing elements are enlarged to improve biometric recognition accuracy, then sensing area increases, but available space for light-emitting elements decreases
Solution Approach 1:
Different sub-light-emitting elements are assigned different sizes and shapes according to their specific functional requirements. The first and third sub-light-emitting elements can be larger to provide sufficient light emission area, while the second sub-light-emitting element is positioned adjacent to the photo-sensing element with optimized dimensions to allow maximum photo-sensing area. This local differentiation of element properties enables simultaneous optimization of both light-emitting and photo-sensing areas within the constrained pixel unit.
3Adaptability or versatility
If multiple sub-light-emitting elements are used in each pixel unit, then light emission control is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple sub-light-emitting elements within each pixel unit are electrically connected and controlled as an integrated group through shared control lines. The first, second, and third sub-light-emitting elements can be selectively activated based on the operational mode (display mode or sensing mode), allowing flexible light emission control without requiring separate control circuits for each sub-element. This merging approach simplifies the control architecture and manufacturing process while maintaining the versatility of differential light emission control.
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 improves the sensing ability of the display device, allowing for more accurate and efficient recognition of biometric information by maximizing the area and placement of photo-sensing elements, thereby enhancing user authentication processes.
Implementation Method 1
an optical manner of sensing an incident light by using a light sensor
Implementation Method 2
each of the plurality of reference pixel units includes: a first light-emitting element, a second light-emitting element, and a third light-emitting element
Data Source
AI summary
A display device includes a base layer, and a pixel layer disposed on the base layer. The pixel layer includes reference pixel units and photo-sensing elements. Each of the reference pixel units includes a first light-emitting element, a second light-emitting element, and a third light-emitting element. Each of the photo-sensing elements is interposed between two second light-emitting elements adjacent to each other in a first direction, and at least one of the first light-emitting element or the third light-emitting element includes a plurality of sub-light-emitting elements electrically connected to each other.