Display Device Frame Width Reduction via Switch Circuit Redistribution
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Solution Overview
Problem
Conventional display devices have a wide frame due to the placement of switch circuits and common signal sources on the selector side relative to the display circuit, which increases the overall width of the device.
Innovation Solution
The display device is configured with a signal processor outside the display area, connected to image lines and position detecting lines via switch circuits, and a common signal source on the opposite side from the signal processor, reducing the width by optimizing the placement of components within the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If switch circuits and common signal sources are placed on the selector side relative to the display circuit, then the display device can achieve proper signal routing and touch detection functionality, but the frame width increases
Solution Approach 1:
The patent redistributes components along the vertical dimension of the display device rather than concentrating them on the selector side horizontally. The first switch circuit is placed on the signal processor side while the second switch circuit and common signal source are placed on the opposite side, creating a vertical distribution pattern that reduces horizontal frame width while maintaining all necessary signal routing paths.
Solution Approach 2:
The patent divides the switch circuits into separate functional groups: the first switch circuit handles image line switching on the signal processor side, while the second switch circuit and common signal source handle position detecting line switching on the opposite side. This segmentation allows each component to be optimally positioned for its specific function, reducing overall frame width.
2Length of stationary object
If multiple switch circuits are distributed across different sides of the display area, then the frame width is reduced, but the circuit complexity increases
Solution Approach 1:
The patent assigns specific functions to switch circuits based on their local positions: the first switch circuit on the signal processor side is dedicated to image line switching, while the second switch circuit on the opposite side is dedicated to position detecting line switching. This local specialization simplifies the control logic for each switch circuit, making the overall complex configuration more manageable.
Solution Approach 2:
By distributing switch circuits across the vertical dimension (different sides of the display area) rather than concentrating them horizontally, the patent reduces frame width while organizing complexity in a spatially efficient manner that can be more easily controlled and maintained.
Data Source
AI summary
A display device includes an image line and a position detecting line disposed in a display area and a signal processor, a first switch circuit, a second switch circuit, a common signal source, and a third switch circuit disposed outside the display area. The signal processor is configured to perform a feeding of an image signal and position detection with time-division. The first switch circuit is configured to electrically connect the image line to the signal processor in synchronization with the feeding of the image signal. The second switch circuit is configured to electrically connect the position detecting line to the signal processor in synchronization with the position detection. The common signal source is configured to feed a common signal. The third switch circuit is configured to electrically connect the position detecting line to the common signal source in synchronization with the feeding of the image signal.