Staggered LED Array Structure for High-Resolution Printing
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Solution Overview
Problem
Current LED array structures in printing devices face limitations in light emission area and intensity, which restrict printing resolution and speed, particularly at high DPI requirements like 600 DPI, where the close spacing of LEDs reduces their individual light emission area and efficiency.
Innovation Solution
The LED array structure incorporates light emitting thyristors arranged linearly on a substrate with strip and plate portions, where adjacent plate portions are staggered, increasing the light emission area and density without compromising the arrangement, thereby enhancing light emission and photoconductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LEDs are arranged tightly to achieve high printing resolution (600 DPI), then printing resolution is improved, but the light emission area and light emission amount of each LED are reduced
Solution Approach 1:
The patent transitions from traditional linear LED arrangement to a two-dimensional staggered plate portion arrangement. The plate portions of adjacent light emitting thyristors are positioned at different locations along the strip portion, creating a multi-dimensional spatial configuration that increases light emission area without reducing arrangement density
Solution Approach 2:
The light emitting thyristor structure is divided into distinct functional portions: a strip portion for arrangement and a plate portion for light emission. This segmentation allows the plate portions to be optimally positioned at different locations along the strip portion, maximizing light emission area while maintaining high arrangement density
2Measurement precision
If LEDs are arranged tightly to improve printing resolution, then printing resolution is improved, but printing speed is reduced due to limited light emission amount
Solution Approach 1:
By arranging plate portions at different locations along the strip portion in a staggered configuration, the patent creates a two-dimensional arrangement that increases total light emission area. This provides sufficient light emission amount to maintain high printing speed while achieving high printing resolution through dense arrangement
Solution Approach 2:
The patent combines multiple light emitting thyristors with staggered plate portions into a unified LED array structure. The combined light emission from multiple plate portions at different locations provides sufficient total light emission amount for high-speed printing while maintaining high arrangement density for high resolution
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 increases the light emission amount and improves printing speed by maintaining high arrangement density and distribution area of light emitting thyristors, effectively addressing the limitations of existing LED array structures in achieving higher printing resolutions and speeds.
Implementation Method 1
Each light emitting thyristor includes a strip portion and a plate portion connected to each other... light emitted by the LEDs is irradiated onto the photoconductive drum
Implementation Method 2
The lens is located between the photoconductive drum and the printing head, and is used to focus light emitted by the printing head on the photoconductive drum
Implementation Method 3
Through a power distribution mechanism, a layer of uniform charges is generated on a surface of the photoconductive drum... charges of an exposed area vary due to exposure
Data Source
AI summary
A light emitting diode (LED) array structure includes a substrate and a plurality of light emitting thyristors. The light emitting thyristors are arranged linearly on the substrate. Each light emitting thyristor includes a strip portion and a plate portion connected to each other, and the plate portions of the adjacent light emitting thyristors are staggered with each other, so as to maintain an arrangement density of the light emitting thyristors, and increase a distribution area of the light emitting thyristors. A printing head and a printing device with the foregoing LED array structure are also provided herein, so as to improve photoconductivity and printing speed of the printing device through the light emitting thyristors, which provide a raised light emission amount by increasing the distribution area.