OLED Display Dual-Mode Driving for Eye Fatigue Reduction
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Solution Overview
Problem
Existing organic light emitting display devices face challenges in achieving improved display quality, particularly when used in wearable devices such as head-mounted displays, where they need to adapt between different modes of operation to optimize image visibility and reduce eye fatigue.
Innovation Solution
The organic light emitting display device incorporates a dual-mode driving system with distinct scan and emission control strategies, adjusting the number of scan signals and emission control signals based on the device's mode of operation. In one mode, it enhances image vividness by increasing driving frequency, and in another mode, it reduces eye fatigue by limiting emission periods to 40% or less of a frame period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display device increases driving frequency to enhance image vividness, then image quality is improved, but eye fatigue increases during extended use
Solution Approach 1:
The display device implements dual-mode operation with periodic switching between first mode (higher driving frequency for image vividness) and second mode (lower driving frequency to reduce eye fatigue). The emission control signals are configured to create periodic emission and non-emission periods, allowing the display to alternate between high-quality output and eye-friendly rest periods.
Solution Approach 2:
The display device dynamically adjusts its operating mode based on usage conditions. The controller can switch between first mode and second mode to adapt to different viewing scenarios, changing the driving frequency and emission control characteristics in real-time to balance image quality and user comfort.
2Object-affected harmful factors
If the display device limits emission period to 40% or less of frame period to reduce eye fatigue, then eye fatigue is reduced, but image visibility may be compromised
Solution Approach 1:
The display device changes key operating parameters including emission period duration (limited to 40% or less of frame period in second mode), driving frequency, and voltage levels to optimize the balance between reducing eye fatigue and maintaining adequate image visibility during different operational modes.
3Adaptability or versatility
If the display device uses different scan signal configurations for different modes, then adaptability to wearable devices is improved, but device complexity increases
Solution Approach 1:
The display device implements a universal dual-mode control architecture where the same scan drivers and emission control lines can operate in either first mode or second mode. The controller selects appropriate signal configurations based on the operational mode, allowing a single hardware design to serve multiple functions and adapt to different usage scenarios including wearable device integration.
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 improves display quality by optimizing image visibility and reducing eye fatigue during extended use in wearable devices, ensuring stable black expression and efficient power management.
Implementation Method 1
an organic light emitting diode; a pixel circuit which stores a voltage of the data signal when the first scan signal is supplied to an i-th first scan line of the first scan lines, and controls the supply time of a current to the organic light emitting diode
Data Source
AI summary
An organic light emitting display device includes: a first pixel region including first pixels coupled to first and second scan lines, and emission control lines; a first scan driver which supplies a first scan signal to each first scan line; a second scan driver which supplies a second scan signal to each second scan line; and an emission driver which supplies a light emission control signal to the emission control lines. The organic light emitting display device is in a second mode when the organic light emitting display device is mounted in a wearable device, and in a first mode otherwise. The second scan driver supplies k second scan signals to each second scan line in the first mode, and supplies j second scan signals to each second scan line in the second mode, where j is greater than k.