Touch Panel Disable Timing for Sleep Mode
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Solution Overview
Problem
Portable computers experience unwanted touch signals when the lid contacts the body before the touch panel is fully disabled, leading to unexpected application responses due to the delay in disabling the touch panel during sleep mode.
Innovation Solution
A method executed by a micro-controller that outputs a control signal to disable the touch panel or its portions before entering sleep mode, utilizing a touch panel controller, lid detection module, and panel angle detection module to determine the optimal time for disabling the touch panel based on predefined angles and lead times to prevent unwanted signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the touch panel is disabled after the processor detects the lid is closed, then the system can enter sleep mode to save battery power, but unwanted touch signals are still generated because the touch panel contacts the body before being fully disabled
Solution Approach 1:
The touch panel is disabled in advance before the lid fully contacts the body. The micro-controller detects the lid closing action and disables the touch panel proactively, ensuring that no touch signals can be generated from the contacting surfaces. This preliminary disabling action prevents the harmful effect of unwanted touch signals while still allowing the system to transition to sleep mode for power savings.
Solution Approach 2:
The system applies a counter-action by disabling the touch panel function before the harmful contact occurs. By detecting the lid closing motion and preemptively turning off the touch panel, the system neutralizes the potential for unwanted touch signals that would otherwise be generated when the lid contacts the body during closure.
2Reliability
If the touch panel is disabled immediately when the lid is closed, then unwanted touch signals are prevented, but the system requires a lead time between detecting lid closure and fully disabling the touch panel
Solution Approach 1:
The system disables the touch panel at an optimized moment during the lid closing process - early enough to prevent unwanted signals but not so early as to cause unnecessary delays. The micro-controller monitors the closing action and triggers the disable command at the precise moment when the touch panel surface is about to contact the body, minimizing the disabling lead time while ensuring reliability.
3Speed
If the touch panel remains enabled during lid closure, then the system responds quickly to user input, but applications may perform unexpected tasks in response to unwanted touch signals from the lid contacting the body
Solution Approach 1:
The system applies a counter-action by disabling the touch panel function before the harmful contact occurs. By detecting the lid closing motion and preemptively turning off the touch panel, the system neutralizes the potential for unwanted touch signals that would otherwise be generated when the lid contacts the body during closure.
Solution Approach 2:
The touch panel is disabled in advance before the lid fully contacts the body. The micro-controller detects the lid closing action and disables the touch panel proactively, ensuring that no touch signals can be generated from the contacting surfaces. This preliminary disabling action prevents the harmful effect of unwanted touch signals while still allowing the system to transition to sleep mode for power savings.
Data Source
AI summary
An embodiment of the invention introduces a method for controlling a touch panel, executed by a micro-controller of a portable computer, which contains at least the following steps. A control signal is outputted to direct a touch panel controller to disable the whole touch panel or a portion thereof before sleep mode is entered.