Display Apparatus With 3D Protrusion Wiring For High Density
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Solution Overview
Problem
Conventional high-definition LED display apparatus face challenges in achieving higher density of light emitting elements and reducing voltage drop across connecting wires due to limitations in wire width and bare chip LED mounting areas, which affect brightness and resistance.
Innovation Solution
A display apparatus with parallel electrically conducting linear electrodes and a planarizing insulating film that allows for increased width of electrodes while maintaining a high occupancy ratio of light emitting area, using semiconductor thin film light emitting elements with exposed conductive electrodes connected by wires, and optionally a light-block planarizing insulating film for enhanced contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the bare chip LED mounting area is increased to achieve higher density of light emitting elements, then the density of light emitting elements is improved, but the wire width must be decreased resulting in higher voltage drop and increased wiring resistance
Solution Approach 1:
The patent transitions from planar mounting to three-dimensional mounting by forming protrusions on the substrate. Light emitting elements are mounted on these protrusions, utilizing the vertical dimension (height direction) in addition to the horizontal plane. This dimensional change allows wire lines to be routed along the inclined surfaces of the protrusions, effectively increasing the available wiring area without expanding the planar footprint, thereby maintaining wide wire width while achieving high element density.
2Loss of energy
If the wire width is increased to reduce wiring resistance, then the wiring resistance is reduced, but the bare chip LED mounting area becomes extremely small
Solution Approach 1:
The patent utilizes the vertical dimension by forming protrusions with inclined surfaces. Wire lines are configured to extend along these inclined surfaces, effectively using the third dimension (height) to accommodate wiring. This allows wire width to be increased for lower resistance while the planar mounting area remains compact, as the wiring occupies vertical and lateral space along the protrusion surfaces rather than competing for flat planar space.
3Loss of energy
If the anode common lines and cathode common lines are made wider to reduce voltage drop, then the voltage drop is reduced, but the occupancy ratio of light emitting area decreases
Solution Approach 1:
The patent forms protrusions on the substrate with inclined surfaces, and wire lines extend along these inclined surfaces in the height direction. This three-dimensional wiring configuration allows common lines to be made wider for reduced voltage drop without consuming additional planar area, as the wiring utilizes the vertical dimension. Consequently, the light emitting area occupancy ratio is maintained while achieving lower voltage drop through wider conductors.
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 enables a high-definition, high-intensity, and large-screen display with reduced wiring resistance and improved brightness uniformity, while also achieving high contrast through strategic use of insulating films.
Implementation Method 1
a light-block planarizing insulating film configured to block light
Implementation Method 2
a plurality of semiconductor thin film light emitting elements, each one having an upper surface and a lower surface, the upper surface having a first conductive electrode and a second conductive electrode
Data Source
AI summary
A high-definition, high-intensity display apparatus having a plurality of semiconductor thin film light emitting elements and a plurality of linear electrodes connecting a power source to the light emitting elements, the linear electrodes being disposed so as to minimize the voltage drop across the linear electrodes.