Display Device Frame Width Reduction via Switch Circuit Placement
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Solution Overview
Problem
Conventional display devices have a wide frame due to the placement of switch circuits between the selector and the display circuit, which increases the overall dimensions of the device.
Innovation Solution
The display device incorporates image lines, signal sources, and a switch circuit positioned outside the display area, where the signal source supplies image and position detecting signals to the image lines in a time-division manner, and the switch circuit connects the image and position detecting lines in synchronization with the signal supply, reducing the frame width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the switch circuit is disposed between the selector and the display circuit, then the connection switching function is achieved, but the frame width increases
Solution Approach 1:
The patent applies dimensionality change by moving the switch circuit from a horizontal placement (between selector and display circuit within the frame) to a vertical placement (above or below the display area). This spatial reconfiguration allows the switch circuit to be positioned in the non-display area, effectively reducing the frame width while maintaining the necessary connection switching function between image lines and position detecting lines.
2Length of moving object
If the switch circuit is positioned outside the display area, then the frame width is reduced, but the signal connection timing must be precisely synchronized
Solution Approach 1:
The patent implements preliminary action by pre-configuring the switch circuit with control logic that anticipates the timing requirements for switching between image signals and position detecting signals. The switch circuit is designed to receive control signals that trigger connection switching at precise moments before the actual signal transmission begins, ensuring synchronized operation without requiring complex real-time adjustments.
3Device complexity
If the signal source supplies both image signals and position detecting signals through the same image lines, then the device complexity is reduced, but the signal transmission timing must be strictly controlled
Solution Approach 1:
The patent applies periodic action by implementing time-division multiplexing where the signal source alternates between supplying image signals and position detecting signals through the same image lines at different time intervals. The switch circuit synchronizes with this periodic signal transmission, connecting to position detecting lines during detection periods and image lines during display periods, thereby reducing device complexity while maintaining strict timing control through rhythmic signal alternation.
Data Source
AI summary
A display device includes image lines, a signal source, position detecting lines, and a switch circuit. The image lines are disposed in a display area in which an image is displayed. The signal source is disposed outside the display area and connected to the image lines. The signal source is configured to supply image signals and position detecting signals to the image lines with time-division. The position detecting lines are disposed in the display area. The switch circuit is disposed on an opposite side from the signal source relative to the display area outside the display area and connected to the image lines and the position detecting lines. The switch circuit is configured to electrically connect the image lines and the position detecting lines in synchronization with feedings of the position detecting signals to the image lines by the signal source.