LED Display Pixel Adhesive Layer With Integrated Color Conversion
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Solution Overview
Problem
The conventional manufacturing process of light-emitting diode displays involves multiple flipping processes and requires the use of a colloid layer to fix crystal grains, which needs to be removed, and an additional process for a color conversion layer, prolonging the manufacturing time.
Innovation Solution
The display device manufacturing method integrates color conversion particles into an adhesive layer used to fix the light-emitting diode, eliminating the need to remove the adhesive layer and an additional process for the color conversion layer, thereby shortening the manufacturing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate color conversion layer is added after crystal grain transfer, then color conversion function is achieved, but manufacturing process time is extended
Solution Approach 1:
The adhesive layer and color conversion layer are merged into a single integrated layer. The adhesive layer contains both adhesive material and color conversion particles, eliminating the need for a separate color conversion layer and reducing manufacturing steps while achieving both fixation and color conversion functions simultaneously
Solution Approach 2:
The adhesive layer is designed to perform multiple functions: it serves as both the adhesive material for fixing crystal grains and the color conversion layer for converting light wavelengths. This multi-functional design eliminates redundant layers and simplifies the overall structure
2Manufacturing precision
If multiple flipping processes are used to transfer crystal grains, then crystal grain positioning is achieved, but manufacturing complexity increases
Solution Approach 1:
The adhesive layer with color conversion particles is prepared in advance on the substrate before crystal grain transfer. This preliminary preparation eliminates the need for multiple flipping operations during the transfer process, as the adhesive layer is already in its final position and configuration
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 method significantly reduces manufacturing time by utilizing the adhesive layer as the color conversion layer, enhancing the color conversion efficiency and display quality without additional processes.
Implementation Method 1
the adhesive layer includes color conversion particles and surrounds the light-emitting layer
Data Source
AI summary
A display device including a plurality of display pixels is provided. Each of the display pixels includes at least one first light-emitting unit. The first light-emitting unit includes a first light-emitting diode and a color conversion layer. The first light-emitting diode is disposed on a substrate, and includes a first pad, a first semiconductor layer, a first light-emitting layer, a second semiconductor layer, and a second pad that are sequentially stacked. The color conversion layer surrounds the first light-emitting diode. A top surface of the color conversion layer is lower than a top surface of the second pad, or is coplanar with the top surface of the second pad. A manufacturing method of the display device is also provided.