OLED Sub-pixel Brightness Compensation via Auxiliary Light-emitting Portion
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Solution Overview
Problem
Organic light-emitting diode (OLED) display panels face issues with brightness decay over time, leading to poor display effects and short service life due to the inherent brightness decay of main light-emitting portions.
Innovation Solution
Incorporating an auxiliary light-emitting portion and a microstructure that includes a transparent body portion, reflective layer, and scattering layer, where the auxiliary light-emitting portion compensates the brightness of the main light-emitting portion to maintain consistent initial brightness, utilizing a control structure to adjust the auxiliary light-emitting portion's brightness based on the main light-emitting portion's operating duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a main light-emitting portion is used in OLED display panels, then the display achieves self-luminescence and high contrast, but the brightness decays over time leading to short service life
Solution Approach 1:
The light-emitting portion is segmented into a main light-emitting portion and an auxiliary light-emitting portion. The main portion provides primary illumination while the auxiliary portion compensates for brightness decay. This segmentation allows independent control of each portion to maintain overall brightness consistency throughout the display's service life.
Solution Approach 2:
The auxiliary light-emitting portion is prepared in advance and activated when brightness decay is detected. The control structure monitors the main light-emitting portion's brightness and preliminarily determines when auxiliary compensation is needed, then activates the auxiliary portion to compensate for the decay before it significantly impacts display quality.
2Reliability
If an auxiliary light-emitting portion is added to compensate for brightness decay, then service life is extended, but the device structure becomes more complex
Solution Approach 1:
The auxiliary light-emitting portion shares the same encapsulation layer, microstructure, and color filter as the main light-emitting portion. Both portions are integrated within the same pixel structure and controlled by a unified control circuit. This merging approach minimizes additional structural complexity while achieving brightness compensation.
Solution Approach 2:
The auxiliary light-emitting portion is designed with the same light-emitting color and structural characteristics as the main portion, allowing it to serve multiple functions: brightness compensation, color consistency maintenance, and integration with existing display architecture. This multi-functionality reduces the need for separate specialized components.
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 solution prolongs the service life of the display panel and enhances display quality by maintaining consistent brightness, thereby extending the application field of OLED display panels.
Implementation Method 1
a reflective layer, wherein an orthographic projection of the reflective layer on the base substrate overlaps with an orthographic projection of the side connection surface on the base substrate
Implementation Method 2
the microstructure further includes a scattering layer formed on the light exit surface
Data Source
AI summary
The present application relates to the field of display technologies, and provides a display panel including a base substrate; a plurality of pixel structures arranged in an array on the base substrate including a main light-emitting portion and an auxiliary light-emitting portion independently driven and having a same light-emitting color, as well as a microstructure covering the main light-emitting portion and the auxiliary light-emitting portion, light emitted by the main light-emitting portion and the auxiliary light-emitting portion of the same organic light-emitting sub-pixel is emitted through the microstructure; and wherein the initial brightness of the organic light-emitting sub-pixel is the initial brightness of the main light-emitting portion; and a control structure configured to control brightness of the auxiliary light-emitting portion according to brightness of the main light-emitting portion to compensate the brightness of the main light-emitting portion, so that brightness of the organic light-emitting sub-pixel remains consistent with its initial brightness.