Parallel LCD Projector Optics for Higher Brightness and Lower Heat
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Solution Overview
Problem
LCD projectors suffer from low brightness output due to low transmittance and high thermal energy, which affects safety and increases production costs, especially in the optical structure requiring three primary color models.
Innovation Solution
A multi-group LCD screen and lens architecture is employed, where collimating, field, and imaging lenses are arranged in parallel, with synchronized movement of imaging lenses to converge and synthesize images, using full-color and black-and-white LCD screens to disperse heat and enhance brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single LCD screen is used in the projector, then the device complexity is low, but the brightness output is low due to low transmittance
Solution Approach 1:
The patent divides the imaging system into multiple independent LCD screens and lens groups. Specifically, it uses two or more LCD screens with corresponding lens groups arranged in parallel, where each screen-lens group acts as an independent imaging unit. This segmentation allows each LCD screen to handle a portion of the light energy, thereby increasing overall brightness output while distributing the thermal load across multiple components.
2Reliability
If a single LCD screen is used in the projector, then the device complexity is low, but the thermal energy concentration is high which affects safety
Solution Approach 1:
The patent segments the thermal load distribution by using multiple LCD screens arranged in parallel. Each LCD screen receives a portion of the total light energy, which disperses the thermal energy concentration that would otherwise be focused on a single screen. This segmentation improves safety and reliability by preventing excessive heat accumulation in any one component.
Solution Approach 2:
The patent arranges multiple LCD screens and lens groups in a spatial distribution along the optical path, effectively adding a spatial dimension to the thermal management system. By distributing components across multiple positions in the optical path rather than concentrating them in a single location, the system achieves better thermal dissipation and safety.
3Adaptability or versatility
If three primary color LCD light valves are used to display full-color image, then the color display capability is improved, but the production cost increases
Solution Approach 1:
The patent segments the color display function across multiple LCD screens that can be configured in different arrangements. Instead of requiring three separate LCD light valves for RGB colors, the system uses multiple full-color LCD screens working in parallel with spatial light modulation, achieving color display capability while reducing the number of components needed and simplifying manufacturing.
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 doubles or triples the brightness output while effectively managing thermal energy, ensuring reliable operation and reducing production costs by optimizing the optical architecture.
Implementation Method 1
the collimating lenses, the LCD imagers, the field lenses and the imaging lenses are sequentially arranged on the optical path emitted by the light sources
Implementation Method 2
the collimating lenses, the LCD imagers, the field lenses and the imaging lenses constitute a plurality of groups of imaging groups
Implementation Method 3
LCD projectors utilize the photoelectric effect of liquid crystals, where the arrangement of liquid crystal molecules changes under the action of an electric field, affecting the transmittance or reflectivity of their liquid crystal units
Data Source
AI summary
The present disclosure provides a LCD projector with multiple display screens and lenses, comprising: light sources, collimating lenses, LCD imagers, field lenses and imaging lenses; the collimating lenses, the LCD imagers, the field lenses and the imaging lenses are sequentially arranged on the optical path emitted by the light sources; the collimating lenses, the LCD imagers and the field lenses are all arranged in parallel; the vertical axes of the collimating lenses, the LCD imagers and the field lenses are maintained on the same axes as the vertical axes of the light emitted by the light sources; the light sources, the collimating lenses, the LCD imagers, the field lenses and the imaging lenses constitute a plurality of groups of imaging groups.