Display Device Non-Display Region Circuit Layout Optimization
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Solution Overview
Problem
The complexity of wire layouts in display devices with integrated touch detection systems increases the area of non-display regions, complicating circuit layout efficiency and reducing the effectiveness of image display and touch detection performance.
Innovation Solution
A display device configuration that includes a driver integrated circuit, a switch circuit, a detection circuit, and a protection circuit, where the switch circuit and detection circuit are arranged to minimize wire density in the non-display region, allowing for reduced wire overlap and improved signal transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of driving electrodes and touch detection electrodes is increased to improve performance, then the performance of image display and touch detection is improved, but the layout of wires becomes complicated and the area of non-display region increases
Solution Approach 1:
The patent combines the functions of driving electrodes and touch detection electrodes by using the same electrode structure for both purposes. The driving electrodes that drive the electro-optical layer are also used as touch detection electrodes, eliminating the need for separate electrode sets and reducing wire layout complexity while maintaining both display and touch detection performance
Solution Approach 2:
The electrode structure is designed to serve multiple functions simultaneously - it acts as both a driving electrode for the electro-optical layer and a touch detection electrode. This multi-functional design reduces the total number of electrodes and wires required, thereby simplifying the overall layout while improving device performance
2Ease of manufacture
If various circuits are collectively arranged at a part of the non-display region, then the circuit control is consolidated, but the area of non-display region becomes large
Solution Approach 1:
The patent applies different arrangement strategies to different parts of the non-display region. The switch circuit is arranged in a first region while the detection circuit is arranged in a second region, with source wires extending from the first region to the detection circuit. This localized arrangement consolidates circuit control while minimizing the overall area occupied by distributing components efficiently across the non-display region
3Area of stationary object
If the area of non-display region is reduced to improve display area ratio, then the display area ratio is improved, but wire density and noise interference increase
Solution Approach 1:
The patent segments the non-display region into distinct functional zones: a first region containing the switch circuit and source wires, and a second region containing the detection circuit. This segmentation allows wires to be routed through specific paths (from first region to second region) that minimize overlap with display electrodes and reduce noise interference, while still achieving a high display area ratio
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 reduces the area of non-display regions, enhances circuit layout efficiency, and improves the performance of both image display and touch detection operations by minimizing noise interference and wire density.
Implementation Method 1
an electrostatic capacitive method is cited. When an input operation is performed by bringing an input tool such as a finger or a touch pen close to or in contact with the capacitive element, the input position is detected by using a change in the electrostatic capacitance of the capacitive element
Data Source
AI summary
The display device includes: a scan line driving circuit selecting a potential supplied to a scan line; a driver chip; a plurality of source wires connected to a detection circuit; a terminal connected to an inspection wire controlling the scan line driving circuit; and a protection circuit arranged between the inspection wire and the terminal When it is assumed that an extending direction of a switch circuit connected with the plurality of source wires is an X axis direction, that one side of the X axis direction is an X1 side, and that the other side therein is an X2 side, the plurality of source wires are arranged closer to the X1 side than a center of the region in the X axis direction, and the terminal and the protection circuit are arranged closer to the X2 side than the center of the region in the X axis direction.