OLED Display Reinforcing Materials in Non-Pixel Areas
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Solution Overview
Problem
Downsized organic light emitting diode (OLED) displays are prone to damage from external impacts, such as dropping, due to lack of effective impact absorption mechanisms.
Innovation Solution
Incorporating reinforcing materials, such as epoxy-based materials, into the non-pixel areas of OLED display substrates and forming grooves on the substrates to accommodate these materials, which expands the filling cross-section and enhances impact absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If downsized OLED display is used, then portability and compactness are improved, but vulnerability to external impact increases
Solution Approach 1:
Reinforcing materials are pre-filled in the non-pixel areas between substrates before the display assembly is completed. This creates a cushioning effect that absorbs external impacts before they can reach and damage the fragile OLED panel, thereby improving impact resistance without increasing the overall display volume.
Solution Approach 2:
The reinforcing materials are nested within the non-pixel areas between the first and second substrates, utilizing the existing structural space. This allows the reinforcing materials to be accommodated without increasing the overall display volume, while still providing impact absorption capability.
2Reliability
If more reinforcing materials are filled between substrates, then impact absorption is improved, but manufacturing complexity increases
Solution Approach 1:
The reinforcing materials are filled in the non-pixel areas before the sealing member is attached and before final assembly is completed. This preliminary action allows for easier material placement and ensures proper distribution before the structure is sealed, simplifying the overall manufacturing process compared to attempting to add materials after assembly.
Solution Approach 2:
Reinforcing materials are selectively filled only in the non-pixel areas between substrates, where they are needed for impact absorption, rather than throughout the entire display structure. This localized approach reduces the total amount of material required and simplifies the filling process while maintaining effective impact protection.
3Quantity of substance
If grooves are formed on substrate sides, then reinforcing material accommodation is improved, but manufacturing precision requirements increase
Solution Approach 1:
Grooves are formed on the side surfaces of the substrates rather than on the top surface where the pixel area is located. This utilizes the lateral dimension of the substrate structure to accommodate reinforcing materials, increasing material capacity without interfering with the pixel area or requiring high precision in the active display region.
Data Source
AI summary
An organic light emitting diode (OLED) display comprises a first substrate and a second substrate configured to comprise a pixel area and a non-pixel area other than the pixel area, a sealing member configured to adhere the first substrate and the second substrate together, reinforcing materials filled into the non-pixel area of the first substrate and the second substrate, and an accommodation unit configured to accommodate some of the reinforcing materials within at least one of the first substrate and the second substrate corresponding to the non-pixel area. A method of manufacturing the OLED display comprises: preparing a mother substrate, including a plurality of display panels and cutting lines between two adjacent display panels; cutting the mother substrate into separated display panel units; forming grooves on a side of each display panel unit; and filling reinforcing materials in a non-pixel area of the display panel units, some of the reinforcing materials flowing into the grooves.