Display Pixel Layout With Close-Coupled Wavelength Conversion
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Solution Overview
Problem
Current display devices face limitations in achieving high light efficiency and color matching rates, particularly due to the distance between light emitting elements and color control layers, which affects the incidence and conversion of light, and the process of designing and repairing light emitting units is restricted by the integration of separate substrates.
Innovation Solution
A display device design featuring a first base substrate with light emitting elements, electrodes, and a color control structure where the light emitting elements are directly disposed on one surface of an insulating layer, and the color control structure on the opposite surface, with a narrow distance between them to enhance light incidence, combined with a manufacturing method using a separate alignment substrate for forming the light emitting elements and electrodes, allowing for flexible design and repair of the light emitting unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If light emitting elements are disposed close to color control layers to improve light efficiency, then light incidence and color matching rate are improved, but device structure becomes more complex
Solution Approach 1:
The patent transitions from a conventional planar arrangement to a three-dimensional structure where light emitting elements are disposed on one surface of an insulating layer and color control layers are disposed on the opposite surface. This vertical stacking approach reduces the horizontal distance between components while maintaining structural organization, thereby improving light efficiency without excessive structural complexity
Solution Approach 2:
The patent introduces an insulating layer as an intermediary component between the light emitting elements and color control layers. This insulating layer serves multiple functions: it provides electrical insulation, maintains precise spacing for optimal light incidence, and enables the vertical stacking architecture. The intermediary element resolves the contradiction by facilitating close proximity for light efficiency while providing structural organization to manage device complexity
2Adaptability or versatility
If separate substrates are used for light emitting elements and color control layers, then design and repair flexibility is improved, but manufacturing process becomes more complex
Solution Approach 1:
The patent divides the display device into distinct functional modules: light emitting elements mounted on a first substrate, color control layers mounted on a second substrate, and these substrates are then combined. This segmentation allows independent design, manufacturing, and repair of each module while maintaining overall device functionality. The modular approach enables flexibility in design and repair without requiring complete device disassembly
Solution Approach 2:
The patent combines separately manufactured substrates (one containing light emitting elements, another containing color control layers) into a unified device structure through the insulating layer and bonding processes. This merging approach allows each substrate to be optimized and manufactured independently using specialized processes, then integrated into a complete functional device, balancing manufacturing complexity with design flexibility
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 improves light efficiency and color matching rates by ensuring most light from the emitting elements is incident on the color control layers, and allows for greater flexibility in designing and repairing the light emitting unit structures without the constraints of integrated substrates.
Implementation Method 1
a plurality of light emitting elements disposed in each of the plurality of sub-pixels on the first surface of the first insulating layer
Implementation Method 2
a color control structure disposed on the second surface of the first insulating layer and including a light transmission layer and wavelength conversion layers
Data Source
AI summary
A display device includes a first base substrate on which a plurality of sub-pixels are defined, a first insulating layer disposed on the first base substrate and including a first and second surfaces, the first surface facing the first base substrate, a plurality of light-emitting elements arranged in each of the plurality of sub-pixels on the first surface of the first insulating layer, a first and second electrodes directly arranged on the first surface of the first insulating layer and electrically contacting each end of each of the light-emitting elements, a circuit layer disposed between the first and second electrodes and the first base substrate and including first transistors electrically connected to the light-emitting elements, a color control structure arranged on the second surface of the first insulating layer and including a light-transmitting layer and wavelength conversion layers, and a color filter layer disposed on the color control structure.