Touch Panel Report Rate Control for Curved Pen Input
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Solution Overview
Problem
Display devices with touch panels experience noise in touch inputs due to unintended hand tremors or external factors, leading to inaccurate touch drawing.
Innovation Solution
A driving method for display devices that adjusts the report rate value based on the curvature of the drawing line and the speed of a pen, distinguishing between curved and straight line modes to improve touch drawing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the report rate value is increased to improve touch input responsiveness, then the responsiveness is improved, but the noise from hand tremors and external factors increases
Solution Approach 1:
The report rate value is made dynamic rather than fixed. The system automatically adjusts the report rate based on the detected curvature of the drawing line - using a first report rate for straight lines and a second report rate for curved lines. This dynamic adjustment allows the system to optimize responsiveness based on the actual drawing behavior, reducing noise from hand tremors during curved movements while maintaining responsiveness during straight line drawing.
Solution Approach 2:
The system changes the report rate parameter based on the geometric characteristics of the drawing path. By detecting whether the drawing line has curvature and adjusting the report rate accordingly, the system adapts to different drawing scenarios. This parameter change enables the system to distinguish between intentional curved drawing and unwanted tremors, optimizing the balance between responsiveness and noise reduction.
2Object-affected harmful factors
If the report rate value is decreased to reduce noise from hand tremors, then the noise is reduced, but the touch drawing accuracy decreases
Solution Approach 1:
The system dynamically adjusts the report rate based on real-time detection of drawing line curvature. When straight lines are detected, a higher report rate is used to maintain accuracy. When curved lines are detected, a lower report rate is used to reduce noise. This dynamic adaptation ensures that accuracy is maintained where needed while noise is reduced where appropriate.
Solution Approach 2:
The system continuously monitors the drawing line characteristics and uses this feedback to adjust the report rate in real-time. By detecting the curvature of the drawing path and responding accordingly, the system creates a closed-loop control mechanism that optimizes both noise reduction and accuracy maintenance based on actual user input behavior.
3Device complexity
If a fixed report rate value is used to simplify the system, then the system complexity is reduced, but the adaptability to different drawing types is worsened
Solution Approach 1:
The system transitions from a static, fixed report rate to a dynamic, adaptive report rate that automatically adjusts based on drawing characteristics. This dynamic approach enables the system to adapt to both straight and curved line drawing without requiring multiple manual mode selections or complex user input, maintaining relative simplicity while significantly improving adaptability.
Solution Approach 2:
The system performs self-adjustment based on the detected drawing line curvature. Rather than requiring external control or manual configuration, the system automatically determines whether to use the first or second report rate based on the geometric characteristics of the input, enabling adaptability through autonomous decision-making.
Data Source
AI summary
One or more embodiments provide a display device, a driving method of a display device, and an electronic device, the driving method including receiving position information of a pen adjacent to the touch panel, calculating a plurality of position coordinates of the pen, determining whether a drawing line connecting the plurality of position coordinates corresponds to a curved line based on the plurality of position coordinates of the pen, driving in a curved line mode when the drawing line corresponds to the curved line, or driving in a straight line mode when the drawing line does not correspond to the curved line, and changing a report rate value of the touch panel by considering a drawing speed of the pen in the curved line mode.