OLED Display Panel Moving Mechanism Reduces Image Sticking
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Solution Overview
Problem
Existing display devices using self-light-emitting elements, such as OLEDs, face issues with image sticking due to prolonged high luminance, leading to conspicuous contrast at boundaries between pixel groups with different image sticking amounts.
Innovation Solution
A display device with a display panel featuring a moving mechanism and a control unit that maintains the position of the display region while moving the panel, and lights the non-display region based on input image data to reduce image sticking differences between regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the non-display region is covered with a blocking member and kept completely dark, then the image sticking problem is reduced, but the contrast at the boundary between display and non-display regions becomes conspicuous
Solution Approach 1:
The patent applies local quality by differentiating the lighting treatment between the display region and non-display region. The non-display region is illuminated with a specific luminance level (different from both the display region and complete darkness) to create a gradient transition. This local differentiation in illumination intensity reduces the abrupt contrast at the boundary while maintaining the image sticking prevention benefit.
2Reliability
If the display region is moved frequently to prevent image sticking, then the image sticking amount is reduced, but the position stability of the displayed image deteriorates
Solution Approach 1:
The patent implements periodic action by moving the display region in a cyclic manner. The display region is moved to a first position during a first period, then to a second position during a second period, and continues alternating between these positions across multiple periods. This periodic movement prevents image sticking by ensuring pixels are not continuously illuminated at the same position, while the regularity of the cycle maintains position stability and predictability for the viewer.
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 reduces the contrast at boundaries between pixel groups with varying image sticking amounts, making the image display more uniform and reducing the visibility of image sticking issues.
Implementation Method 1
display devices using self-light-emitting elements such as organic light emitting diodes (OLEDs) as a light source
Data Source
AI summary
A display device includes a display panel including a display region in which an input image corresponding to input image data is displayed and a non-display region which is a region other than the display region, each of the display region and the non-display region including a plurality of self-light-emitting elements, a moving mechanism configured to move the display panel along the display region, and a control unit configured to change a position of the display region in the display panel in such a manner that, when controlling the moving mechanism to move the display panel, the position of the display region in space is maintained the same. The control unit lights the non-display region when the input image is displayed in the display region.