Electric-Field Display Manufacturing for Light Emitter Alignment
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Solution Overview
Problem
Existing display devices face challenges in achieving proper alignment of inorganic light emitting elements, which affects luminance and reliability.
Innovation Solution
An apparatus and method involving a chamber with a stage, electric field application module, heating element, and vacuum pump are used to align and dry light emitting elements on a substrate, forming an electric field and controlling temperature to improve alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are disposed on a substrate without proper alignment control, then the manufacturing process is simple, but the alignment degree is insufficient and reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by forming an electric field on the substrate before depositing the light emitting elements. This pre-formed electric field guides and aligns the elements as they are deposited, ensuring proper orientation and position. The electric field is established in advance through electrode structures on the substrate, which creates directional guidance for the incoming material, thereby improving alignment degree without requiring complex post-deposition adjustment mechanisms.
Solution Approach 2:
The patent replaces mechanical alignment systems with an electric field-based alignment mechanism. Instead of using complex mechanical positioning devices, masks, or alignment marks that would increase device complexity, the invention uses electric fields to guide and orient the light emitting elements during deposition. This substitution of mechanical systems with electromagnetic field control achieves precise alignment while keeping the manufacturing apparatus relatively simple.
2Manufacturing precision
If a complex alignment system is used to improve alignment degree, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The patent replaces mechanical alignment systems with an electric field-based alignment mechanism. Instead of using complex mechanical positioning devices, masks, or alignment marks that would increase device complexity, the invention uses electric fields to guide and orient the light emitting elements during deposition. This substitution of mechanical systems with electromagnetic field control achieves precise alignment while keeping the manufacturing apparatus relatively simple.
Solution Approach 2:
The patent utilizes parameter changes by controlling the strength, direction, and distribution of the electric field to achieve precise alignment. By adjusting electric field parameters (voltage, electrode configuration, field intensity) rather than mechanical parameters, the system achieves high manufacturing precision. The electric field parameters can be dynamically controlled during the deposition process to optimize alignment for different regions of the substrate.
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
Enhances the alignment degree of light emitting elements, improving luminance and reliability of the display device.
Implementation Method 1
The electric field application module may form an electric field on the target substrate, such that the at least one light emitting element may be aligned on the target substrate
Implementation Method 2
The heating element may include a heat source having a temperature in a range of about 20° C. to about 60° C.
Implementation Method 3
The heat source part may include a bar-shaped heat source extending in a first direction. The heat source part may move in the direction other than the first direction.
Implementation Method 4
The vacuum pump may form a vacuum pressure atmosphere in the chamber
Data Source
AI summary
An apparatus for manufacturing a display device includes a chamber, a stage supporting a target substrate, an electric field application module disposed at a side of the stage, a heating element overlapping the stage in a plan view, a heat source part that moves in a direction parallel to a plane the stage extends on the stage, and a vacuum pump connected to the chamber.