Rollable Touch Screen Power Zoning for Accurate Boundary Input
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In rollable electronic devices with expandable displays, touch screen panels (TSP) face issues with touch recognition accuracy due to curvature changes and increased power consumption when the display is withdrawn into or extended from a housing, leading to touch errors and inefficiencies.
Innovation Solution
A method is implemented to control the power supply to touch screen panel areas based on a reference line, supplying power in one direction and blocking it in the opposite direction to manage touch recognition accurately and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is supplied to all wiring lines in the TSP, then touch recognition coverage is complete, but power consumption increases and manufacturing cost increases
Solution Approach 1:
The TSP is divided into multiple touch areas corresponding to different wiring lines. Power supply is segmented and controlled individually for each touch area based on the withdrawal degree of the display, allowing selective activation of only necessary regions rather than powering the entire panel.
Solution Approach 2:
The power supply control is dynamic and adapts based on the withdrawal degree of the display. As the display is withdrawn or retracted, the system dynamically adjusts which touch areas receive power, optimizing energy consumption according to the current operational state.
2Use of energy by moving object
If power is blocked to wiring lines at the boundary between inside and outside of housing, then power consumption is reduced, but touch input is disabled in partial area
Solution Approach 1:
The system dynamically determines power supply status based on the withdrawal degree of the display. When the display is partially withdrawn, the system identifies which touch areas should remain active to maintain touch input functionality while blocking power to areas that are no longer needed, thus balancing power savings with operational requirements.
3Measurement precision
If the interval of wiring lines of the TSP is manufactured to be the same as the interval of coordinates or pixels of the display, then touch accuracy is improved, but manufacturing cost increases
Solution Approach 1:
A correspondence relationship is established between wiring lines and touch areas through software mapping rather than requiring precise physical alignment. The system uses algorithms to match touch coordinates with the appropriate wiring lines, serving as an intermediary that decouples the manufacturing precision requirements from the final touch accuracy.
4Reliability
If a TSP area including a boundary between the inside and outside of the housing is controlled, then touch errors due to curvature change are reduced, but device complexity increases
Solution Approach 1:
The TSP is segmented into multiple touch areas with individual power control. This segmentation allows the system to selectively activate or deactivate specific regions, including boundary areas, based on the display withdrawal degree, thereby managing complexity through modular control rather than holistic management.
Data Source
AI summary
According to an embodiment, a method of controlling an electronic device including a touch screen panel (TSP) at least a part of which is located in a housing may be withdrawn to the outside of the housing comprises: identifying a withdrawal extent of the TSP; selecting a reference line for controlling a power supplying range of a plurality of touch areas among a plurality of lines for dividing a plurality of touch areas of the TSP based on the withdrawal degree; supplying power to touch areas in a first direction in which the TSP is withdrawn based on the reference line and blocking power to touch areas in a second direction opposite to the first direction based on the reference line, among the plurality of touch areas; and restricting touch recognition with respect to a part extending from the reference line in one touch area adjacent to the reference line among the touch areas in the first direction.