Touch Panel Power Segmentation for Closed Display Control
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Solution Overview
Problem
Electronic apparatuses with touch and display panels face unwanted touch inputs when the display unit is closed, as existing systems interrupt power only after a predetermined time, leading to unintended interactions.
Innovation Solution
An electronic apparatus with a sensor and controller that detects the closed state of the display unit, immediately stopping the touch panel operation and maintaining the display panel operation for a predefined time, then entering sleep mode, preventing unwanted inputs and allowing immediate reopening without delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is interrupted only after a predetermined time when the display unit is closed, then the system avoids premature power shutdown, but unwanted touch inputs occur on the touch panel
Solution Approach 1:
The power interruption process is segmented into two distinct phases: first interrupting touch panel power to prevent unwanted inputs, then after a predetermined time, interrupting display panel power. This segmentation resolves the contradiction by addressing the touch input reliability issue immediately while delaying the display power shutdown.
Solution Approach 2:
The touch panel power is interrupted preliminarily before the display panel power is interrupted. This preliminary action prevents unwanted touch inputs from occurring while the display remains visible, resolving the reliability issue without requiring immediate complete power shutdown.
2Reliability
If the display unit is closed and power is immediately interrupted, then unwanted touch inputs are prevented, but the system cannot respond if the user immediately reopens the display
Solution Approach 1:
The power interruption is segmented into sequential stages: touch panel power is interrupted first to prevent unwanted inputs, while display panel power continues for a predetermined time. This allows the system to maintain responsiveness to immediate reopening actions while preventing spurious touch inputs during the closed state.
Solution Approach 2:
The system dynamically adjusts power supply based on the closed state duration. If the display remains closed beyond the predetermined time, display power is then interrupted. This dynamic approach balances preventing unwanted inputs with maintaining ease of operation for immediate reopening.
3Loss of energy
If both touch panel and display panel power are interrupted simultaneously when closed, then power consumption is reduced, but unwanted touch inputs cannot be prevented
Solution Approach 1:
Power consumption is optimized through segmented power interruption: touch panel power is interrupted immediately upon closing to prevent unwanted inputs, while display panel power continues for a predetermined time before being interrupted. This sequential approach reduces overall power consumption while maintaining touch input reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents unintended touch inputs by immediately deactivating the touch panel when the display unit is closed and maintaining the display panel functionality for a set period, ensuring seamless operation upon reopening.
Implementation Method 1
The sensor may sense magnetism of a magnet of the display unit to sense the opened and closed states of the display unit with respect to the main body.
Implementation Method 2
The sensor may sense a relative angle of a hinge that connects the main body and the display unit to each other, to sense the opened and closed states of the display unit with respect to the main body.
Implementation Method 3
When a surface of the capacitive type touch panel is touched by a part of the body of a user, a distortion in the panel's electrostatic field is used to calculate a touch coordinate.
Implementation Method 4
If the user touches a screen of the compression type touch panel, the compression type touch panel senses a current that flows due to a contact between upper and lower plates of a touched point of the screen, to calculate a touch coordinate.
Data Source
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AI summary
An electronic apparatus and a method of controlling thereof includes a main body, a display unit configured to be combined with the main body to pivot to be opened and closed and having a touch panel and a display panel, a sensor configured to sense a closed state of the display unit with respect to the main body, and a controller configured to, if the display unit is changed from an opened state to the closed state, stop an operation of the touch panel and then stop an operation of the display panel.