Double-Sided Display Touch Mapping via Intermediary Sensor
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Solution Overview
Problem
Current display devices lack the ability to provide effective touch input and display functions on both surfaces efficiently, limiting their usability and portability, especially when folded or used with one hand.
Innovation Solution
A display device with a first and second display unit on opposite surfaces, each equipped with a sensor unit, and a third sensor unit between them, along with a driver unit and mapping controller, allowing for double-sided interlocking mode where touch inputs on the rear surface are mapped to the front surface, enhancing usability and touch recognition accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a display device provides touch input and display functions on both surfaces, then usability is improved, but device complexity increases due to multiple sensor units and mapping control mechanisms
Solution Approach 1:
The display device is segmented into multiple functional surfaces with independent sensor units (first sensor unit on front surface, second sensor unit on rear surface). Each sensor unit can operate independently, allowing touch input functionality to be distributed across both surfaces without requiring a single complex sensing system
Solution Approach 2:
A mapping controller acts as an intermediary between the second sensor unit (rear surface) and the first display unit (front surface). It maps touch input coordinates from the rear surface to corresponding positions on the front surface, enabling cross-surface touch control without direct physical connection between the sensor and display units
2Measurement precision
If the third sensor unit is activated to detect touch inputs on the folded surface, then touch recognition accuracy is improved, but energy consumption increases
Solution Approach 1:
The third sensor unit's activation state is dynamically adjusted based on device configuration. The sensor driver activates the third sensor unit only when a folded state is detected (via sensing signals from first or second sensor units or control signals from option keys), and deactivates it when the device is in unfolded state, optimizing energy consumption while maintaining touch recognition accuracy when needed
Solution Approach 2:
The sensor driver periodically evaluates whether to activate the third sensor unit based on incoming sensing signals and control signals. This periodic activation strategy ensures the third sensor unit operates only during folded states where it is needed for accurate touch recognition, rather than continuously
3Measurement precision
If the mapping controller is activated to map touch positions, then touch input accuracy on folded surfaces is improved, but processing time increases
Solution Approach 1:
The mapping controller pre-establishes coordinate mapping relationships between the rear surface (second sensor unit) and front surface (first display unit). When the device is in folded state, the mapping relationships are predetermined based on the geometric configuration, allowing rapid coordinate transformation without real-time complex calculations
4Adaptability or versatility
If multiple sensor units are provided on both surfaces, then touch input functionality is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple sensor units (first sensor unit, second sensor unit, and third sensor unit) are provided that can detect various types of touch inputs including touches on front surface, rear surface, and folded surface. Each sensor unit serves multiple functions: touch detection, folding state detection, and coordinate mapping reference, reducing the need for separate specialized components
Data Source
AI summary
A display device includes a first display unit and a first sensor unit provided on one surface of the first display unit, a second display unit and a second sensor unit provided on one surface of the second display unit, a third sensor unit provided between the first sensor unit and the second sensor unit and a driver unit including a display driver which controls the first display unit and the second display unit, a sensor driver which controls the first, second and third sensor units, and a mapping controller which maps a position information of a touch input detected from a sensing signal of the second sensor unit into a corresponding position information on the first display unit.