Display Brightness Control via User Distance Sensing
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Solution Overview
Problem
Users often struggle to adjust display parameters such as brightness and color contrast of electronic devices to optimal levels, leading to eye fatigue and potential injury due to prolonged use.
Innovation Solution
A display adjusting device and method that utilizes a light sensing unit, image capturing unit, and controlling unit to adjust display brightness and color contrast based on environmental illumination and the distance between the user's eyes and the display, with a look-up table for predetermined settings and threshold-based adjustments, and an alarming system for maximum or minimum brightness limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users manually adjust display parameters, then adjustment flexibility is maintained, but adjustment precision is insufficient leading to eye fatigue
Solution Approach 1:
The display adjusting device automatically senses environmental illumination and calculates user distance, then adjusts display brightness and color contrast without requiring manual user intervention. The system serves itself by using sensors and image processing to autonomously optimize display parameters.
Solution Approach 2:
The device continuously monitors environmental conditions through light sensing units and user position through image capturing, then feeds this information back to the controlling unit which adjusts display parameters accordingly. This closed-loop feedback system ensures optimal display settings are maintained dynamically.
2Illumination intensity
If display brightness is increased to improve visibility, then viewing comfort improves, but eye strain increases with prolonged use
Solution Approach 1:
The system dynamically changes display brightness and color contrast parameters based on sensed environmental illumination levels and calculated user distance. By continuously adjusting these parameters to match viewing conditions, the system maintains optimal visibility while preventing excessive brightness that causes eye strain.
3Measurement precision
If automatic adjustment system is implemented, then display parameter precision improves, but device complexity increases
Solution Approach 1:
The controlling unit performs multiple functions: it processes light sensing data, analyzes images to calculate user distance, determines optimal display parameters, and executes adjustments. By consolidating these functions in a single multi-functional unit, the system achieves high precision without proportionally increasing overall device complexity.
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
Precisely adjusts display settings to prevent eye strain and injury by dynamically adjusting brightness and color contrast according to environmental conditions and user distance, with an alarm system to notify users when maximum or minimum brightness is reached.
Implementation Method 1
a light sensing unit for sensing an environmental illumination associated with the display unit
Implementation Method 2
an image capturing unit for capturing an image of a user in front of the display unit
Data Source
AI summary
A display adjusting device adapted for adjusting display parameter(s) of a display unit includes a light sensing unit for sensing an environmental illumination associated with the display unit; an image capturing unit for capturing an image of a user in front of the display unit; and a controlling unit, electrically connected to the display unit, the light sensing unit and the image capturing unit, for selectively adjusting a first display brightness of the display unit to a second display brightness according to the environmental illumination, calculating a distance between eyes of the user and the display unit according to the image, and selectively adjusting the second display brightness to a third display brightness according to the distance.