Optical Compensation Sheet Holder for Projector Alignment
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Solution Overview
Problem
Conventional projector devices face challenges in easily adjusting optical compensation sheets due to variations in slow axis direction, leading to potential light leak and uneven coloring, and existing adjustment mechanisms can cause stress and deviation in the optical compensation sheets.
Innovation Solution
A projector device with an optical compensation sheet holder that includes a frame adjustable on two rotation axes, allowing for precise alignment of the optical compensation sheet without additional force, ensuring the slow axis direction remains consistent and preventing stress-induced deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional adjustment mechanisms are used to adjust optical compensation sheets, then the sheets can be positioned relative to liquid crystal panels, but stress and deviation occur in the optical compensation sheets causing light leak and uneven coloring
Solution Approach 1:
The optical compensation sheet holder enables dynamic adjustment of the optical compensation sheet through turning members that rotate about rotation axes. This dynamic mechanism allows precise alignment adjustment without applying stress to the sheet, resolving the contradiction between alignment precision and structural integrity by providing a stress-free adjustment capability.
Solution Approach 2:
The holder acts as an intermediary device between the optical compensation sheet and the liquid crystal panel. It provides a stable mounting structure with rotation axes that enable precise positioning without directly stressing the optical compensation sheet, thus maintaining both alignment precision and sheet integrity.
2Ease of manufacture
If optical compensation sheets are cut from sheet material with tolerance variations, then manufacturing is simplified, but adjustment mechanisms are required to align slow axis direction with liquid crystal panel alignment direction
Solution Approach 1:
The adjustment mechanism uses turning members that can rotate about rotation axes to adjust the orientation of the optical compensation sheet. This dynamic adjustment capability compensates for tolerance variations from sheet material cutting while maintaining a relatively simple device structure.
Solution Approach 2:
The holder provides rotation adjustment about axes perpendicular to the optical axis, adding an orientational dimension to the adjustment capability. This allows alignment correction in the slow axis direction without complicating the manufacturing process of the optical compensation sheet itself.
3Ease of operation
If existing adjustment mechanisms apply force to position optical compensation sheets, then alignment can be achieved, but additional force causes stress-induced deviation in the sheet
Solution Approach 1:
The turning members enable rotational adjustment about fixed rotation axes without applying stress to the optical compensation sheet. This dynamic adjustment mechanism achieves precise alignment of the slow axis direction while maintaining sheet integrity, resolving the contradiction between ease of operation and alignment precision.
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 easier and more precise adjustment of optical compensation sheets, reducing the risk of light leak and uneven coloring, while maintaining the alignment of the slow axis direction, resulting in improved image quality and workability.
Implementation Method 1
The optical compensation sheets have liquid crystal molecules therein. The optical compensation sheets are attached such that the liquid crystal molecules have a slow axis in a direction parallel to an alignment direction of liquid crystal molecules constituting the respective liquid crystal panels to thereby perform a function of blocking incidence of unwanted component waves of light
Data Source
AI summary
A liquid crystal projector device of the present invention has a liquid crystal panel and a polarizing plate oppositely arranged on each optical path of light of three primary colors, and a rectangular optical compensation sheet for compensating birefringence of liquid crystal molecules in the liquid crystal panel, which is held by an optical compensation sheet holder and arranged between the liquid crystal panel and the polarizing plate. The optical compensation sheet holder includes a frame for holding the optical compensation sheet, and a turning member, which holds the frame turnably on a rotation axis approximately parallel to one of a pair of diagonals of the liquid crystal panel, and is attached to an end edge of an optical system holding case for holding an optical system turnably on a rotation axis perpendicular to the optical compensation sheet.