Touch Sensing Device Bus Architecture for Area Reduction
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Solution Overview
Problem
The existing touch sensing devices have a large area occupancy due to the numerous lines connecting readout integrated circuits to a touch controller, which hinders efficient data transfer and increases the overall size of the device.
Innovation Solution
A touch sensing device is designed with a first bus connecting the touch driving device to the touch controller, allowing for the transfer of touch sensing data during the display period, and utilizing ternary-symbol data conversion to reduce the number of buses required, thereby minimizing the area occupied by the connecting lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If numerous lines are used to connect readout integrated circuits to touch controller, then data transfer capability is sufficient, but area occupied by connecting lines becomes large
Solution Approach 1:
Multiple data lines are merged into a single bus structure. The touch driving device transfers touch sensing data to the touch controller through a first bus during the display period, consolidating what would otherwise require multiple separate connecting lines into one shared communication pathway, thereby reducing the total area occupied by connections.
Solution Approach 2:
The first bus serves multiple functions: it transfers touch sensing data from the touch driving device to the touch controller during the display period, and can also be used for other control signals. This multi-functional use of a single bus structure eliminates the need for dedicated separate lines for each function, reducing overall connection area.
2Speed
If more lines are used for data transfer, then data transfer speed is improved, but device complexity increases
Solution Approach 1:
Data transfer occurs in periodic cycles synchronized with the display period. The touch driving device transfers touch sensing data to the touch controller through the first bus during the display period, creating a rhythmic, periodic data flow that maintains high transfer speeds while using a simplified single-bus structure instead of multiple permanent high-speed channels.
Solution Approach 2:
The first bus continuously transfers touch sensing data during the entire display period without interruption. This continuous data flow through a single bus maintains high effective transfer speed while avoiding the complexity of multiple discrete data paths that would require coordination and synchronization.
Data Source
AI summary
The disclosure relates to a touch sensing device and a driving method thereof. A touch sensing device includes a touch driving device receiving touch sensing data from a touch sensor during a touch sensing period, a touch controller receiving the touch sensing data from the touch driving device during a display period, and a first bus connecting the touch driving device to the touch controller, wherein the touch driving device transfers the touch sensing data to the touch controller through the first bus during the display period.