Printer Imaging Optics Using Beam Deflection for Higher Resolution
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Solution Overview
Problem
The resolution of imaging devices in printers is limited by the size of micro lenses and pixel spacing, leading to low light energy utilization and restricted imaging quality.
Innovation Solution
An imaging device with M rotatable photosensitive drums, at least one display chip, projection lenses, and beam deflection systems, where light-emitting regions on the display chip correspond to light-receiving sub-regions on the photosensitive drums, and beam deflection systems deflect images to these sub-regions, enhancing resolution and light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single photosensitive drum with direct projection is used, then the device structure is simple, but the imaging resolution is limited by micro lens size and pixel spacing
Solution Approach 1:
The single photosensitive drum is divided into M rotatable photosensitive drums, each with multiple light-receiving sub-regions. This segmentation allows the system to achieve high resolution by distributing the imaging function across multiple drums, overcoming the limitation of direct projection through a single drum while managing complexity through modular architecture.
Solution Approach 2:
The photosensitive drums are made rotatable rather than fixed, enabling dynamic repositioning during the imaging process. This dynamic capability allows the system to achieve high resolution by rotating drums to specific positions for exposure, then switching to different drums for different parts of the image, thereby resolving the contradiction between simplicity and precision.
2Loss of energy
If direct projection from display chip to photosensitive drum is used, then the optical path is simple, but light energy utilization is low
Solution Approach 1:
Beam deflection systems are introduced as intermediary components between the projection lenses and the photosensitive drums. These intermediaries redirect and optimize the light paths, ensuring that light from each light-emitting region is precisely directed to the corresponding light-receiving sub-region, thereby improving light energy utilization while managing optical complexity through systematic design.
Solution Approach 2:
The system changes the spatial parameters of light propagation by using beam deflection systems to redirect light at specific angles. This parameter modification ensures optimal light distribution across multiple photosensitive drums and their sub-regions, maximizing light energy utilization efficiency while maintaining manageable optical path complexity through controlled parameter adjustments.
3Area of stationary object
If multiple light-emitting regions are projected directly to a single drum, then the imaging width is limited by drum size, but using multiple drums increases device complexity
Solution Approach 1:
The imaging function is segmented across M rotatable photosensitive drums, each handling a portion of the total imaging width. This segmentation allows the system to achieve a large total imaging width by combining the capabilities of multiple drums, while managing the complexity through standardized modular units that can be controlled systematically.
Solution Approach 2:
The use of rotatable photosensitive drums introduces dynamic repositioning capability, allowing the system to allocate different drums to different imaging regions as needed. This dynamic allocation enables the system to achieve large imaging width by activating multiple drums in parallel or sequentially, while the rotational mechanism provides a standardized way to manage and control the increased number of components.
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
The solution enables high-resolution printing using a low-resolution pixel array, improving light-emitting region utilization and ensuring uniformity of imaging pixels on the photosensitive drum.
Implementation Method 1
The beam deflection system is configured to deflect an image, which is formed by light from one light-emitting region in a display chip through a corresponding projection lens, to a light-receiving sub-region corresponding to the one light-emitting region
Implementation Method 2
Each projection lens is configured to form an image for a corresponding display chip
Implementation Method 3
Light-emitting regions of the at least one display chip have a one-to-one correspondence with light-receiving sub-regions of the M rotatable photosensitive drums
Data Source
AI summary
An imaging device includes: M rotatable photosensitive drums, at least one display chip, at least one projection lens, and at least one beam deflection system. The light-receiving region of each photosensitive drum includes multiple light-receiving sub-regions. Each display chip includes at least two light-emitting regions arranged in a first direction. At least one projection lens is in one-to-one correspondence with the at least one display chip. Each projection lens is configured to form an image for a corresponding display chip. The at least one beam deflection system is in one-to-one correspondence with the at least one display chip. The beam deflection system is configured to deflect an image, which is formed by light from each light-emitting region in the display chip through a corresponding projection lens, to a corresponding light-receiving sub-region.