Display Device Dummy Line Routing for Narrow Non-Display Area
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Solution Overview
Problem
Display devices with scanning functions face limitations in reducing the width of the non-display area due to the arrangement of data transmission lines and read-out transmission lines, which hinders the minimization of the peripheral area while maintaining functionality.
Innovation Solution
The display device incorporates a substrate with a circuit layer and element layer, featuring light emitting elements and light sensing elements, along with dummy lines and bypass lines that allow data and read-out lines to be efficiently routed, reducing the extension length of transmission lines and thereby minimizing the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data transmission lines and read-out transmission lines are arranged in the non-display area to provide scanning function, then the scanning function is achieved, but the width of the non-display area cannot be reduced
Solution Approach 1:
The patent applies dimensionality change by routing read-out lines through the display area diagonally across emission areas rather than exclusively through the non-display area. This spatial reconfiguration allows the read-out lines to share the display area with emission areas, reducing the required width of the non-display area while maintaining both display and scanning functions.
Solution Approach 2:
The display area is given multi-functionality by allowing it to serve both light emission purposes and light sensing purposes simultaneously. The read-out lines passing through the display area enable the scanning function to be integrated with the display function, making the display area perform dual roles and reducing the need for dedicated non-display area for signal transmission.
2Area of stationary object
If the non-display area width is reduced, then the display area ratio increases, but the arrangement of transmission lines becomes more difficult
Solution Approach 1:
The patent resolves the routing complexity by introducing diagonal routing of read-out lines through the display area at angles, utilizing the two-dimensional space more efficiently. This diagonal arrangement allows transmission lines to cross emission areas without excessive lengthening, making the routing feasible even with reduced non-display area width.
Solution Approach 2:
The patent segments the routing path of read-out lines by allowing them to pass through different regions of the display area and non-display area in a structured sequence. This segmentation of the transmission path enables systematic arrangement of lines with appropriate spacing and routing zones, reducing complexity despite the constrained overall width.
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 increases the display area ratio, enhancing display quality by reducing the width of the non-display area and optimizing the layout of transmission lines within the display device.
Implementation Method 1
a scanning function for detecting a curvature of an object that is in contact with a screen based on differences in the amount of light reflected from the screen
Implementation Method 2
Each of the light emitting elements include a light emitting layer made of an organic light emitting material
Data Source
AI summary
A display device includes a substrate, a circuit layer, and an element layer. The substrate includes a display area, and a non-display area. The display area includes emission areas, a non-emission area, and light sensing areas in parts of the non-emission area. The element layer includes light emitting elements in the emission areas, and light sensing elements in the light sensing areas. The circuit layer includes light emitting pixel drivers, light sensing pixel drivers, data lines, read-out lines extending parallel to the data lines, first dummy lines extending in a first direction, and second dummy lines extending in a second direction and respectively paired with the data lines. The first dummy lines include a first read-out bypass line electrically connected to a first read-out line. The second dummy lines include a first read-out connection line electrically connected to the first read-out bypass line.