Display Panel Read-Out Line Layout for Biometric Sensing Areas
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Solution Overview
Problem
Existing display devices face limitations in achieving a high degree of freedom in sensing areas, particularly in integrating biometric information recognition functions without compromising display performance.
Innovation Solution
A display device design that includes a base layer with defined display and non-display areas, a circuit layer with pixel and sensor driving circuits, and an element layer with light emitting and receiving elements, utilizing specific arrangements of read-out and connection lines, bridge lines, and sensor driving circuits to enhance sensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If read-out lines are extended across the entire display area to connect all sensor driving circuits, then sensing coverage is improved, but line complexity and manufacturing difficulty increase
Solution Approach 1:
The display area is divided into a first area and a second area, with read-out lines selectively arranged only in the first area. This segmentation allows the sensing function to be implemented in a specific region without requiring comprehensive coverage across the entire display area, thereby reducing line complexity while maintaining functional sensing capability.
Solution Approach 2:
The read-out lines are concentrated in the first area where sensor driving circuits are located, rather than being uniformly distributed across the entire display area. This local quality approach ensures that sensing resources are optimized for the specific region requiring biometric recognition, reducing unnecessary lines in other areas and simplifying the overall structure.
2Adaptability or versatility
If sensor driving circuits are integrated throughout the display area, then sensing capability is improved, but display area is reduced
Solution Approach 1:
The display area is segmented into a first area dedicated to sensing functions and a second area dedicated to display functions. By confining sensor driving circuits and read-out lines to the first area, the patent enables biometric sensing capability while preserving the second area for optimal display performance, thus resolving the conflict between sensing capability and display area.
Solution Approach 2:
The patent separates sensing and display functions into different spatial zones within the display panel. The first area handles sensing operations with sensor driving circuits and read-out lines, while the second area maintains full display functionality, effectively using spatial dimensionality to accommodate both functions without mutual interference.
3Reliability
If connection lines are arranged to connect read-out lines to read-out circuit, then signal transmission is improved, but visual bezel area increases
Solution Approach 1:
Connection lines are strategically arranged within the first area where sensor driving circuits are located, rather than extending across the entire display area. This localized arrangement ensures reliable signal transmission from sensing elements to the read-out circuit while minimizing the impact on the visual bezel area, as the connection lines are confined to a specific functional region.
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
Enhances the sensing area flexibility and efficiency by allowing for improved integration of biometric information recognition, while maintaining display functionality and reducing visual bezel area.
Implementation Method 1
an optical method of detecting incident light by using an optical sensor
Data Source
AI summary
A display device includes: a base layer, in which a display area and a non-display area are defined; a circuit layer on the base layer; and an element layer on the circuit layer, and including light emitting elements and light receiving elements to correspond to the display area, wherein the circuit layer includes: pixel driving circuits connected to the light emitting elements; sensor driving circuits connected to the light receiving elements; data lines connected to the pixel driving circuits; read-out lines in a first area of the display area, and connected to, among the sensor driving circuits, a first sensor driving circuit in the first area; and a connection line part connecting the read-out lines to a read-out circuit, and wherein the connection line part includes: first connection lines in a second area of the display area; and second connection lines connecting the first connection lines to the read-out lines.