Segmented Touch IC Layout for Large Display Touch Detection
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Solution Overview
Problem
Existing display devices face challenges in efficiently integrating touch detection systems, particularly in large-sized displays, leading to increased manufacturing costs and design complexities.
Innovation Solution
A touch detection device is designed with a touch area divided into sub-touch areas, each equipped with a one-to-one correspondence of touch driving and detecting ICs, mounted on substrates or circuit boards, and controlled by a single touch control IC, utilizing switching units for alternating control signals to facilitate efficient touch input detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single touch IC is used to control the entire touch area, then device complexity is reduced, but the IC cannot be optimized for different screen aspect ratios and manufacturing costs increase
Solution Approach 1:
The touch detection device is divided into multiple sub-touch areas, with each sub-area having its own dedicated touch driving IC and detecting IC. This segmentation allows each IC to be optimized for specific regional requirements while the overall system can adapt to different screen aspect ratios through flexible configuration of the number and arrangement of sub-areas.
Solution Approach 2:
The touch control IC serves as a universal controller that can manage multiple sub-touch areas with different configurations. By designing the control architecture to be scalable, the same control IC can adapt to various screen sizes and aspect ratios by dynamically configuring the number of active sub-areas, eliminating the need for completely different IC designs for different display formats.
2Adaptability or versatility
If multiple touch ICs are used for large-sized touch areas, then adaptability to different screen sizes is improved, but manufacturing costs increase
Solution Approach 1:
The touch area is segmented into multiple sub-touch areas, each with dedicated driving and detecting ICs. This segmentation enables the system to scale flexibly - for smaller displays, fewer sub-areas can be active, while larger displays can activate more sub-areas, all using the same standardized IC design, thereby reducing manufacturing costs through economies of scale.
Solution Approach 2:
The system adapts to different screen sizes by changing the number and arrangement of active sub-touch areas rather than requiring different hardware configurations. The touch control IC dynamically adjusts parameters such as the number of active driving/detecting ICs and their spatial arrangement, allowing a single manufacturing process to serve multiple display sizes.
3Extent of automation
If digital processing modules are included in touch ICs, then processing capability is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The digital processing modules are extracted from the touch ICs and centralized in a separate touch control IC. This separation allows the touch ICs to remain simple and specialized for analog signal generation and detection, while the digital processing functions are consolidated in a single controller that can be optimized independently, reducing overall system complexity.
Solution Approach 2:
The touch control IC acts as an intermediary between the multiple simple touch ICs and the digital processing requirements. It receives analog signals from the touch ICs, performs necessary conversion and processing, and outputs digital touch data, thereby allowing the touch ICs to maintain simple structures while still achieving high processing capability through the intermediary controller.
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 simplifies the implementation and design of integrated circuits for large-sized displays, reduces manufacturing costs, and allows for adaptable touch sensor integration across various screen aspect ratios, including those in vehicles.
Implementation Method 1
This may be accomplished using, for example, capacitance-type touch sensors
Data Source
AI summary
A touch detection device may include a touch area including a plurality of driving electrodes and a plurality of detecting electrodes, a plurality of touch driving integrated circuits (ICs) electrically connected to and supplying driving signals to the driving electrodes, a plurality of touch detecting ICs electrically connected to the detecting electrodes and receiving touch detection signals from the detecting electrodes, and a touch control IC controlling the touch driving ICs and the touch detecting ICs. The touch area may be divided into a plurality of sub-touch areas, the touch driving ICs may be provided to correspond to the plurality of sub-touch areas, respectively, in a one-to-one manner, and the plurality of touch detecting ICs may be provided to correspond to the sub-touch areas, respectively.