Portable Device Display Brightness Adjustment via Touch Panel Distance Detection
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Solution Overview
Problem
Portable electronic devices with touch panels face issues in maintaining screen brightness during prolonged inactivity, leading to user inconvenience and inefficient power management.
Innovation Solution
A portable electronic device with a touch panel that adjusts display brightness based on user proximity and activity, using a touch panel to detect distance and area, allowing for automatic brightness adjustment between multiple levels, including a dimmer and brighter setting, to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the backlight is turned off to save power during inactivity, then power consumption is reduced, but the display becomes difficult to view
Solution Approach 1:
The patent implements dynamic brightness adjustment by introducing multiple brightness levels (first brightness, second brightness, third brightness) that automatically switch based on touch panel operation status and temperature conditions. This resolves the contradiction by making brightness adaptive rather than static, allowing the display to be bright when needed and dim when saving power.
Solution Approach 2:
The patent changes the brightness parameter based on temperature detection and touch operation status. When temperature increases (indicating hand holding) and no touch operation occurs, the system transitions between brightness levels to balance power saving and viewability, directly addressing the contradiction through parameter adjustment.
2Loss of energy
If the display screen is darkened to save power, then power consumption is reduced, but user convenience deteriorates due to repeated operations needed to brighten the screen
Solution Approach 1:
The patent implements self-service functionality where the display automatically adjusts its own brightness based on temperature sensor data and touch panel operation detection, without requiring user intervention. The system autonomously determines when to switch between brightness levels, eliminating the need for users to repeatedly press power keys or menu keys to adjust brightness.
Solution Approach 2:
The patent uses feedback from temperature sensors and touch panel operation detection to automatically control brightness adjustments. The system continuously monitors these parameters and responds by adjusting brightness accordingly, creating a closed-loop control system that improves user convenience while saving power.
3Illumination intensity
If the backlight is turned on during inactivity to maintain visibility, then display viewability is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by implementing intermediate brightness levels between fully on and fully off states. The third brightness level provides partial illumination that maintains sufficient viewability during hand-held inactivity while consuming less power than full brightness, resolving the contradiction through graduated intensity levels.
4Loss of energy
If multiple brightness levels are implemented for automatic adjustment, then power management and viewability are improved, but device complexity increases
Solution Approach 1:
The patent makes the touch panel serve multiple functions: it detects both touch operations and temperature changes. This multi-functionality reduces the need for separate sensors and control systems, implementing the multiple brightness level adjustment mechanism while minimizing the increase in device complexity through resource sharing.
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
Enables users to maintain a readable screen brightness during inactivity by automatically adjusting based on proximity, ensuring power savings without user intervention.
Implementation Method 1
a touch panel which is disposed to overlap the display unit and which is able to detect a distance from an input object
Data Source
AI summary
A portable electronic device includes: a display unit; and a touch panel which is disposed to overlap the display unit and which is able to detect a distance from an input object. If brightness of the display unit is first brightness, if there is no operation on the touch panel for a predetermined time, and if the distance is greater than a predetermined distance, the brightness of the display unit changes to second brightness darker than the first brightness. If the brightness of the display unit is the first brightness, if there is no operation on the touch panel for the predetermined time, and if the distance is equal to or smaller than the predetermined distance, the brightness of the display unit is set to third brightness brighter than at least the second brightness.