Hybrid OLED-LED Display Substrate for Extended Service Life
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Solution Overview
Problem
Conventional OLED display panels have short service life due to differences in life spans of OLED components emitting different colors, with blue-emitting OLED components having the shortest life span, limiting the overall panel lifespan and manufacturing complexity.
Innovation Solution
The display substrate incorporates OLED components with excellent light-emitting performance and long life span on one side and LED components with similar characteristics on the opposite side, replacing blue-emitting OLED components with blue-emitting LED components to extend the service life and simplify manufacturing, while maintaining color display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blue-emitting OLED components are used in conventional OLED display panels, then color display functionality is achieved, but the service life of the display panel is significantly reduced due to the short lifespan of blue OLED components
Solution Approach 1:
The display panel is divided into different sub-pixel types: first sub-pixels with OLED components on the first surface, and third sub-pixels with LED components on the second surface. This segmentation allows each component type to be optimized independently, with LED components providing the blue color channel that has the shortest lifespan in conventional OLED panels.
Solution Approach 2:
The patent combines OLED components and LED components in a single display panel, creating a hybrid structure where OLED components emit red and green light while LED components emit blue light. This merging allows the panel to leverage the long lifespan of OLEDs for colors where they excel and the long lifespan of LEDs for the blue channel.
2Ease of manufacture
If all sub-pixels use OLED components to maintain uniform manufacturing process, then manufacturing simplicity is achieved, but the overall service life is limited by the shortest-lived component
Solution Approach 1:
Different regions of the display panel use different light-emitting components tailored to specific color requirements. LED components are specifically placed in third sub-pixels where blue light emission is needed, while OLED components are used in first and second sub-pixels for red and green colors, optimizing both lifespan and color performance locally.
3Reliability
If LED components are introduced to replace blue OLED components, then service life is extended, but device structure becomes more complex
Solution Approach 1:
The patent utilizes the third dimension (depth/thickness) by placing OLED components on the first surface and LED components on the second surface of the substrate. This vertical stacking approach allows both component types to coexist without increasing the horizontal footprint, managing structural complexity through spatial optimization.
4Duration of action of stationary object
If mixed OLED and LED components are used on opposite sides of the substrate, then service life is significantly increased, but manufacturing precision requirements increase
Solution Approach 1:
The substrate is prepared with predetermined regions and structures before component placement, including pre-formed electrode patterns, encapsulation structures, and alignment features. This preliminary preparation simplifies the subsequent placement of OLED and LED components, ensuring precise positioning without requiring extremely high manufacturing precision during assembly.
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 configuration significantly increases the service life of the display apparatus by leveraging the long life span of LED components and reducing manufacturing difficulties, while maintaining a compact and thin structure.
Implementation Method 1
The first sub-pixel includes an OLED component that emits light of a first color
Implementation Method 2
the third sub-pixel includes a LED component that emits light of a third color
Data Source
AI summary
The present disclosure relates to a display substrate. The display substrate may include a base substrate; and a plurality of pixels in a display area on the base substrate. At least one of the plurality of pixels includes a first sub-pixel and a third sub-pixel. The first sub-pixel may include an OLED component that emits light of a first color, the third sub-pixel may include a LED component that emits light of a third color, and the first color and the third color are different colors. All sub-pixels including OLED components may be disposed on a same side of the base substrate, and all sub-pixels including LED components may be disposed on another side of the base substrate opposite the side on which the OLED components are disposed.