Touch Panel Proximity Data Counting for False Screen Off Prevention
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Solution Overview
Problem
Display devices with touch panels often erroneously enter a screen off mode due to data interference when a conductor approaches and moves away from a non-proximity area, leading to inaccurate operation of the screen off mode function.
Innovation Solution
The implementation of a host processor that counts proximity data rises in both proximity and non-proximity areas, generating count values and resetting them based on specific reference values and slopes, to prevent erroneous screen off mode activation when a conductor moves away from the non-proximity area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the screen off mode is activated based on proximity data from the touch panel, then power saving is improved, but false activation occurs when a conductor approaches and moves away from the non-proximity area
Solution Approach 1:
The touch panel is divided into two functional regions: a proximity area where screen off mode is activated when a conductor approaches, and a non-proximity area where proximity data is monitored to prevent false activation. This spatial segmentation allows the system to distinguish between intentional proximity (user's face approaching the display) and unintentional proximity (conductor passing by the non-proximity area), thereby reducing false screen off activations while maintaining power saving benefits.
Solution Approach 2:
The system continuously monitors proximity data from both the proximity area and non-proximity area, using the feedback from the non-proximity area to validate or cancel screen off mode activation. When proximity data increases in the non-proximity area, the system checks whether this indicates a false activation condition and accordingly adjusts the screen off mode state, ensuring reliable operation.
2Ease of operation
If proximity data from the non-proximity area is ignored, then the system is simpler to operate, but erroneous screen off mode activation occurs due to data interference
Solution Approach 1:
The touch panel is divided into two functional regions: a proximity area where screen off mode is activated when a conductor approaches, and a non-proximity area where proximity data is monitored to prevent false activation. This spatial segmentation allows the system to distinguish between intentional proximity (user's face approaching the display) and unintentional proximity (conductor passing by the non-proximity area), thereby reducing false screen off activations while maintaining power saving benefits.
Solution Approach 2:
The non-proximity area acts as an intermediary monitoring zone that provides contextual information about the conductor's movement. By monitoring proximity data in this intermediate non-proximity area, the system can determine whether a change in proximity data in the proximity area is due to intentional user interaction or false interference, thereby improving screen off mode reliability without complicating user interaction.
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
This approach enhances the accuracy and reliability of the screen off mode function by distinguishing between proximity and non-proximity areas, preventing malfunctions and ensuring accurate power management.
Implementation Method 1
the capacitive type touch panel having a fast response speed and a thin thickness is widely used... when a conductor (e.g., a user's face) approaches a specific area (a proximity area) of a display panel of the display device
Data Source
AI summary
A display device includes a display panel, a touch panel on the display panel, a host processor, and a display panel driver. The host processor receives proximity data of the touch panel. The display panel driver receives an input control signal from the host processor and drives the display panel based on the input control signal. The touch panel includes a proximity area and a non-proximity area. The host processor counts a rise of the proximity data in the proximity area to generate a first count value. The host processor resets the first count value when the proximity data in the non-proximity area increase.