Electrostatic Capacitance Coupling Electrode Layout for Image Display Devices
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Solution Overview
Problem
In image display devices using electrostatic capacitance coupling for non-contact signal transmission, the increase in frame area due to multiple channels required for higher resolution is not efficiently managed, leading to reduced flexibility in application products.
Innovation Solution
The design includes a first board with a tabular power supply line and a semiconductor element connected to a second board with a common electrode, forming a parallel capacitor configuration to minimize the number of electrodes needed for each channel, thereby reducing the frame area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple non-contact transmission paths are employed to increase transmission rate for higher resolution, then transmission rate is improved, but frame area is enlarged
Solution Approach 1:
The patent combines multiple transmission channels into a single non-contact transmission path by time-division multiplexing. The transmitting circuit alternately transmits signals for multiple channels through one electrode, and the receiving circuit sequentially receives these signals. This merging approach maintains high transmission rates needed for HD/Full HD resolution while using only one electrode pair, thereby preventing frame area enlargement.
Solution Approach 2:
The patent employs dynamic time-division multiplexing where the transmitting circuit dynamically switches between different channels in time sequence. The transmission path is dynamically allocated to different channels at different time slots, allowing multiple channels to share a single physical electrode pair. This dynamic approach enables high data throughput without requiring multiple simultaneous physical paths.
2Productivity
If a plurality of electrodes are arranged in parallel on a board to increase transmission rate, then transmission rate is improved, but area occupied by electrodes is increased
Solution Approach 1:
The patent merges multiple channel transmissions into a single electrode pair by implementing time-division multiplexing. Instead of arranging multiple electrodes in parallel, the system uses one transmitting electrode and one receiving electrode that operate across multiple channels in sequential time slots. This significantly reduces the area occupied by electrodes while maintaining the total transmission capacity needed for high-resolution displays.
Solution Approach 2:
The single non-contact transmission path is designed to serve multiple functions by handling multiple channels through time-division multiplexing. The same electrode pair is universally used for transmitting and receiving signals across all channels, making the electrode structure multi-functional rather than requiring dedicated electrodes for each channel. This universality reduces the overall electrode area required.
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 minimizes the increase in frame area with a larger number of channels, enhancing the flexibility of application products by optimizing the layout for electrostatic capacitance coupling in image display devices.
Implementation Method 1
a first electrode group for transmitting/receiving a signal through electrostatic induction; and a second electrode group for transmitting/receiving a signal through electrostatic induction
Implementation Method 2
forming a parallel capacitor configuration
Data Source
AI summary
In order to restrain increase in frame area caused along with a larger number of channels to a minimum, there is provided an image display device that adopts a communication method in which a signal is transmitted/received with the use of electrostatic capacitance coupling. A first board includes: a tabular first power supply line, a tabular second power supply line, a semiconductor element, and a tabular first electrode group. A second board includes: a tabular second electrode group and a tabular common electrode. In a state where the first board and the second board are laid on each other, the first electrode group overlaps the second electrode group while one of the first power supply line and the second power supply line overlaps the common electrode.