OLED Display Device Image Movement Path Controller
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Solution Overview
Problem
Organic light emitting diode (OLED) display devices experience an afterimage phenomenon due to differences in the lifetime and brightness of elements, leading to user inconvenience from varying light emission across the screen.
Innovation Solution
An OLED display device that includes a controller which calculates the average picture level (APL) of an image and sets a movement path and period based on this APL, allowing the image to be displayed along this path and period to reduce the degradation of OLED elements and minimize afterimage effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If elements continuously emit light at high brightness to ensure visibility of logos and menu items, then visibility is improved, but element lifetime is significantly reduced
Solution Approach 1:
The patent implements a moving image display mechanism where static images are periodically updated with slight movements or changes. By setting a movement period and allowing images to move along defined paths, the same visual content is refreshed at intervals, preventing continuous static display. This periodic updating redistributes the operational load across different time periods, reducing cumulative degradation of individual OLED elements while maintaining visibility requirements.
2Measurement precision
If static images are displayed at fixed positions, then image clarity is improved, but afterimage phenomenon occurs due to differential element degradation
Solution Approach 1:
The patent transforms static image display into a dynamic process by introducing movement paths and movement periods. Images are no longer fixed at single positions but move along defined trajectories over time. This dynamic display approach ensures that while images maintain clarity during display, the underlying OLED elements are periodically refreshed by displaying content on different elements over time, preventing localized degradation and afterimage effects.
Solution Approach 2:
The controller pre-calculates and sets movement paths and movement periods for images before display begins. By planning the movement trajectory and timing in advance, the system ensures that images maintain optimal clarity and positioning while systematically distributing the display load across different OLED elements. This preliminary planning prevents any single element from bearing continuous stress, thereby preventing afterimage phenomenon before it occurs.
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 disperses the degradation of OLED elements, reducing the afterimage phenomenon and enhancing user experience by adjusting the image movement path and period according to the image's brightness levels, thereby minimizing brightness differences across the screen.
Implementation Method 1
The OLED is a self-luminous organic material that emits light by itself by using an electroluminescence phenomenon that light is emitted when a current flows through a fluorescent organic compound
Data Source
AI summary
An organic light emitting diode (OLED) display device including a display unit including pixels constituted by OLEDs; and a controller configured to display an image through the display unit, acquire an average picture level (APL) of the image, set a movement path and a movement period of the image on the display based on the acquired APL, and move the image on the display unit based on the set movement path and the movement period.