Wearable Display Brightness Drift Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Miniaturized OLED display apparatuses in wearable AR/VR glasses face challenges with heat dissipation, leading to decreased light-emitting efficiency, color drift, and increased power consumption due to high-temperature stress, which affects brightness and color accuracy over time.
Innovation Solution
A wearable display apparatus with a control unit, display unit, light transmission unit, and photoelectric detection unit that transmits a portion of the display image to detect brightness and color characteristics, sending feedback signals to the control unit for compensation, allowing for real-time adjustment to maintain image quality and extend the display's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the display apparatus is miniaturized to be wearable, then the size and weight are reduced, but the brightness and heat dissipation performance deteriorate
Solution Approach 1:
The patent applies parameter changes by adjusting the driving current parameters of the OLED display over time. The driving current is increased during early usage periods to compensate for aging effects, and adjusted based on detected brightness and color characteristics. This dynamic parameter adjustment maintains display performance despite the constraints of miniaturization.
2Illumination intensity
If the display apparatus operates at high brightness for extended periods, then the light-emitting efficiency is improved, but the heat generation and temperature increase
Solution Approach 1:
The patent implements feedback mechanisms using photoelectric detection units that continuously monitor the brightness and color characteristics of the display. This feedback information is used by the control unit to adjust driving parameters in real-time, optimizing brightness output while managing heat generation through adaptive current control.
Solution Approach 2:
The patent applies dynamics by making the driving current parameters time-dependent and adaptive. The driving conditions change dynamically based on usage duration, detected display characteristics, and aging compensation algorithms. This dynamic adjustment allows the display to maintain performance while adapting to thermal and aging conditions.
3Illumination intensity
If the display operates under high-temperature stress, then the initial brightness is maintained, but the color accuracy and light-emitting efficiency deteriorate over time
Solution Approach 1:
The patent applies preliminary action by implementing aging compensation algorithms that proactively adjust driving parameters before significant performance degradation occurs. The system tracks usage duration and proactively modifies current parameters to counteract expected aging effects, including color shift and efficiency loss, thereby maintaining color accuracy over time.
Solution Approach 2:
The patent changes multiple parameters including driving current, pulse width modulation duty cycles, and color compensation factors based on detected display characteristics. These parameter adjustments are designed to compensate for aging effects and maintain both brightness and color accuracy under thermal stress conditions.
4Productivity
If the display apparatus is used for extended periods, then the productivity is improved, but the power consumption increases due to aging
Solution Approach 1:
The patent uses feedback from photoelectric detection to monitor actual display output and adjust driving parameters efficiently. By detecting actual brightness and color characteristics, the system optimizes power consumption while maintaining perceived display quality, allowing extended usage without excessive power increase.
Solution Approach 2:
The patent implements time-dependent parameter changes where driving current and other electrical parameters are adjusted based on usage duration and detected performance characteristics. This allows the display to maintain acceptable performance over extended periods while managing power consumption through adaptive parameter optimization.
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
The solution effectively compensates for brightness and color drift, ensuring consistent user experience and extending the lifespan of the wearable display apparatus by continuously adjusting the display settings based on real-time feedback, thereby maintaining image quality and reducing power consumption.
Implementation Method 1
a photoelectric detection unit configured to send a feedback signal to the control unit after detecting the second part of the light
Implementation Method 2
the light transmission unit is configured to transmit a first part of light of the display image to human eyes, and transmit a second part of the light of the display image to the photoelectric detection unit
Data Source
AI summary
A wearable display apparatus comprises a control unit, a display unit, an optical transmission unit and a photoelectric detection unit. The control unit is configured to control the display unit to output a display image, the light transmission unit is configured to transmit a first part of light of the display image to human eyes, and transmit a second part of the light of the display image to the photoelectric detection unit, the photoelectric detection unit is configured to send a feedback signal to the control unit; and the control unit is configured to compensate for a drift of characteristics including brightness and color according to the feedback signal from the photoelectric detection unit.