Display Panel Data-Line Layout for Narrow Bezel Biometric Sensing
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Solution Overview
Problem
Existing display devices face challenges in reducing the area of the non-display region while maintaining biometric information recognition functionality.
Innovation Solution
The display device incorporates a base layer with a display region and non-display region, featuring a circuit layer with pixel and sensor drive circuits, data lines, and data connecting lines, along with a driver chip and sensor chip, optimizing the layout to minimize the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional data line routing is used where all data lines connect directly to the driver chip, then the connection is simple, but the non-display region area increases
Solution Approach 1:
The data lines are divided into first data lines and second data lines that are spatially separated and routed through different paths. The first data lines connect to the driver chip directly while the second data lines connect through data connecting lines, segmenting the routing complexity and enabling compact layout that reduces non-display region area.
Solution Approach 2:
The patent utilizes multi-layer routing where data lines are connected through different layers of the display panel. Data connecting lines extend in the second direction (vertical direction) to connect second data lines to the driver chip, effectively using the third dimension (depth/layers) to resolve routing conflicts and reduce planar footprint.
2Area of stationary object
If data connecting lines are added to reduce non-display region, then the area is reduced, but the circuit complexity increases
Solution Approach 1:
The circuit is segmented into functional blocks: pixel drive circuits, sensor drive circuits, and data connecting lines. This segmentation allows each component to be optimized independently while maintaining overall compactness, reducing the non-display region without proportionally increasing complexity.
Solution Approach 2:
The data connecting lines serve multiple functions: they route data signals from second data lines to the driver chip, and their arrangement also contributes to reducing the non-display region area. This multi-functionality justifies the added circuit elements by providing dual benefits.
3Reliability
If biometric sensing functionality is maintained, then the sensing capability is preserved, but the non-display region area increases
Solution Approach 1:
The display function and biometric sensing function are merged into a single integrated structure. Light emitting elements and light receiving elements are positioned to overlap or be adjacent, allowing the same physical space to serve both display and sensing purposes, thereby maintaining sensing capability while minimizing non-display region.
Solution Approach 2:
Different regions of the display panel have different functional qualities: some areas are optimized for light emission (display), while others incorporate light receiving elements for sensing. This local differentiation allows biometric sensing to be integrated without requiring a separate dedicated non-display 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
This configuration effectively reduces the non-display region while maintaining biometric information sensing capabilities, enhancing the overall display efficiency and aesthetics.
Implementation Method 1
an element layer on the circuit layer and including light emitting elements and light receiving elements corresponding to the display region
Implementation Method 2
a light sensing technique for sensing incident light using an optical sensor
Implementation Method 3
a capacitive sensing technique for sensing a change in capacitance between electrodes
Implementation Method 4
an ultrasonic sensing technique for sensing vibration using a piezoelectric element
Data Source
AI summary
A display device includes a base layer having a display region and a non-display region, a circuit layer on the base layer, and an element layer on the circuit layer and including light emitting elements and light receiving elements corresponding to the display region. The circuit layer includes pixel drive circuits connected to the light emitting elements, sensor drive circuits connected to the light receiving elements, readout lines connected to the sensor drive circuits, first data lines connected to a first group of pixel drive circuits from among the pixel drive circuits, second data lines spaced from the first data lines in a first direction and connected to a second group of pixel drive circuits from among the pixel drive circuits, and data connecting lines electrically connected with the second data lines, respectively, in the display region.