Projector Circuit Board Integration for EMI Reduction
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Solution Overview
Problem
Conventional projectors face issues with malfunction and inferior image quality due to poor contact between circuit boards caused by size deviations and high electromagnetic interference, leading to increased costs for superior quality connectors and materials.
Innovation Solution
Integration of components such as an image receiving terminal, central processing unit, motor driving module, DMD, and DMD control module on a single projector circuit board produced by high-level semiconductor processes, allowing for reduced size and improved alignment perpendicular to the light path, enhancing signal transmission and reducing EMI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If connectors or bus are used to connect first and second circuit boards for high-speed signal transmission, then transmission speed is improved, but cost increases and electromagnetic interference worsens
Solution Approach 1:
The patent merges the first circuit board (containing DMD) and second circuit board (containing CPU) into a single integrated circuit board. This eliminates the need for external connectors and buses, thereby reducing electromagnetic interference while maintaining high-speed signal transmission capabilities through direct integration of all components on one board.
2Speed
If connectors or bus are used to connect first and second circuit boards for high-speed signal transmission, then transmission speed is improved, but cost increases
Solution Approach 1:
The patent integrates all components (DMD, CPU, memory, graphics processing unit) onto a single circuit board, eliminating the need for expensive high-quality connectors and bus materials. This consolidation reduces material costs and simplifies manufacturing processes while preserving high-speed transmission capabilities through direct component interconnection.
3Ease of manufacture
If size deviation between first and second circuit boards exceeds tolerable value, then manufacturing flexibility is improved, but connection reliability worsens
Solution Approach 1:
The patent consolidates multiple components onto a single circuit board with unified manufacturing processes. This eliminates the interface between separate boards, thereby removing the problem of size deviation and connection reliability. The single board design ensures consistent manufacturing tolerances and reliable connections without requiring precise alignment between multiple separate boards.
4Volume of moving object
If first circuit board is set perpendicular to light path and second circuit board is set perpendicular to first circuit board for space utilization, then space efficiency is improved, but contact quality worsens
Solution Approach 1:
The patent integrates all circuit board components into a single perpendicular board structure relative to the light path. This eliminates the need for multiple perpendicular connections between separate boards, thereby maintaining compact space utilization while ensuring reliable contact quality through direct component integration on the single board.
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 reliable and efficient image projection with reduced size and cost, minimizing malfunctions and electromagnetic interference, while maintaining high transmission speeds.
Implementation Method 1
The DMD, comprising a plurality of micro-mirrors, is used in reflecting the colored beam, transforming the colored beam into an image beam
Data Source
AI summary
One embodiment of the invention discloses projector circuit boards comprising an image receiving terminal, a central processing unit, a motor driving module, a DMD and a DMD control module. The image receiving terminal receives an image signal and transmits the received image signal to the central processing unit. The central processing unit processes the received image signal. The motor driving module drives a motor on the basis of the processed image signal to rotate a color wheel to generate a colored beam. The DMD, comprising a plurality of micro-mirrors, is used in reflecting the colored beam, transforming the colored beam into an image beam, and transmitting the image beam to a projection lens to project an image. The rotation angles of the micro-mirrors are controlled by the DMD control module coupled between the central processing unit and the DMD. The projector circuit board is perpendicular to a light path of the projection lens.