Color Converting Panel Structure to Prevent Bonding Pressure Damage
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Solution Overview
Problem
The pressing or compression of a color converting panel during bonding with a substrate in display devices can lead to defects such as luminance deterioration.
Innovation Solution
A display device design featuring a display panel and a color converting panel with a sealing member at the external edge of the peripheral area, including partition walls and dummy partition walls to prevent pressing, and the use of color filters with openings and different widths to distribute stress evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the color converting panel is bonded to the substrate, then the display device can be assembled, but pressing or compression occurs causing luminance deterioration
Solution Approach 1:
A buffer layer is introduced between the color converting panel and the substrate to act as an intermediary that absorbs compression forces during bonding, preventing direct transmission of pressing damage to the color converting panel while still allowing assembly to proceed
Solution Approach 2:
The buffer layer is pre-positioned beneath the color converting panel before bonding occurs, providing advance cushioning protection against compression forces that will be applied during the bonding process, thereby preventing luminance deterioration before it can occur
2Strength
If the color converting panel is pressed during bonding, then substrates can be bonded together, but regions may be broken or torn
Solution Approach 1:
The buffer layer serves as a mediator between the bonding process and the color converting panel, enabling the substrates to be bonded together while preventing the bonding process from causing breaks or tears in the panel by absorbing excess compression
Solution Approach 2:
The buffer layer modifies the mechanical parameters of the bonding interface by providing compliance and stress distribution, allowing bonding to occur at controlled stress levels that maintain panel integrity while achieving sufficient bonding strength
Data Source
AI summary
A display device includes: a display panel and a color converting panel facing each other and having a display area and a peripheral area; and a sealing member therebetween and disposed on an external edge of the peripheral area. The display panel includes a first substrate, light-emitting devices the first substrate, and an encapsulation layer on the light-emitting devices and in the display area and the peripheral area. The color converting panel includes a second substrate, a first color filter, a second color filter, and a third color filter on the second substrate and in the display area and the peripheral area, and a partition wall and a dummy partition wall on the first-third color filters. At least one of the first color filter, the second color filter, and the third color filter has an opening in the peripheral area, and the dummy partition wall overlaps the opening.