Light-Emitting Element Ink Mixing for Uniform Pixel Distribution
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Solution Overview
Problem
Existing display device manufacturing processes face challenges in reducing process costs and ensuring uniform distribution of light emitting elements in pixels.
Innovation Solution
A display device manufacturing apparatus with a controlled system of channels and counters to manage the flow and distribution of light emitting elements, using a mix chamber and channels to block or connect fluidly based on element count, and a controller to adjust the flow of ink and elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting elements are added to ink in a mix chamber after printing starts, then manufacturing flexibility and cost reduction are achieved, but uniform distribution of light emitting elements in pixels becomes difficult to control
Solution Approach 1:
The patent applies preliminary action by preparing and counting light emitting elements before they are added to the ink. The counting unit measures the number of light emitting elements in advance, and based on this measurement, the control unit calculates the precise amount of ink to be supplied. This ensures uniform distribution of light emitting elements in pixels while maintaining manufacturing flexibility and cost efficiency.
2Manufacturing precision
If a counting unit and control system are added to measure and regulate light emitting elements, then uniform distribution in pixels is achieved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a control unit that performs multiple functions: it receives information from the counting unit, calculates the required ink amount based on the number of light emitting elements, and controls the ink supply. This multi-functional approach achieves uniform distribution of light emitting elements while minimizing the increase in device complexity through functional integration.
3Ease of manufacture
If ink and light emitting elements are mixed in a mix chamber, then manufacturing flexibility and cost are reduced, but control over the amount of light emitting elements per pixel becomes challenging
Solution Approach 1:
The patent applies feedback by using the counting unit to measure the number of light emitting elements before mixing, and the control unit uses this measurement information to calculate and adjust the ink supply amount. This closed-loop feedback system ensures precise control over the amount of light emitting elements per pixel while maintaining the cost-effective mix chamber approach.
Data Source
AI summary
A display device manufacturing apparatus includes a first reservoir accommodating a solvent; a second reservoir accommodating a light emitting element; a mix chamber accommodating an ink including the solvent and the light emitting element; a first channel connecting the first reservoir and the mix chamber; a second channel connecting the second reservoir and the mix chamber; and a counter that obtains information on a number of the light emitting elements that are moved in the second channel.