Liquid Crystal Display Light Collecting Elements for Moiré Reduction
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Solution Overview
Problem
Conventional liquid crystal display devices experience moiré effects due to regular structures in the backlight, particularly with micro-lens arrays and lenticular lenses, which are difficult to manufacture in complex forms and require regular intervals matching pixel arrangements, limiting their application.
Innovation Solution
A liquid crystal display device with a pair of substrates, polarizing plates, and a liquid crystal layer, featuring light collecting elements on the lower substrate that are formed continuously and vary in shape to correspond with openings for transmitting light, with the light collecting elements' displacement and focal distance optimized to minimize moiré effects by varying their center line and height relative to the openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If regular micro-lens arrays or lenticular lenses are used in the backlight, then light collection efficiency is improved, but moiré effects occur due to regular structural patterns
Solution Approach 1:
The patent applies asymmetry by making the light collecting elements have irregular shapes and varying sizes rather than uniform circular lenses. The elements are designed with asymmetric forms that disrupt the regular periodic pattern, thereby reducing moiré effects while maintaining light collection functionality through continuous formation and strategic positioning corresponding to pixel openings.
Solution Approach 2:
The patent implements local quality by varying the shape, size, and form of individual light collecting elements according to their specific positions and corresponding pixel openings. Each element is locally optimized with different geometries (triangular, rectangular, irregular shapes) rather than using a uniform design, allowing tailored light collection for different regions while breaking overall periodicity.
2Manufacturing precision
If light collecting elements are arranged at regular intervals matching pixel intervals, then image resolution is improved, but manufacturing complexity increases due to complex forms
Solution Approach 1:
The patent applies merging by forming all light collecting elements continuously in a single manufacturing process rather than individually positioning each lens. The continuous formation method allows complex varied shapes to be created in one step, significantly simplifying manufacturing while maintaining precise positioning corresponding to pixel openings through the continuous formation process.
3Object-affected harmful factors
If light collecting elements are formed with varying shapes and positions, then moiré effects are reduced, but structural regularity is lost
Solution Approach 1:
The patent applies universality by designing light collecting elements that serve multiple functions: they collect light, define pixel boundaries, and create anti-moiré patterns simultaneously. The continuous formation structure provides a unified framework that accommodates varied element shapes and positions while maintaining overall structural coherence and functional consistency across the entire backlight assembly.
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 effectively reduces moiré effects between light collecting elements and the surface light emitting element, allowing for a simple structure with improved image quality by altering the spatial frequency and phase of moiré fringes, making it easier to manufacture and apply.
Implementation Method 1
light collecting elements for collecting light in the above described openings for transmitting light are provided on the above described lower substrate side
Data Source
AI summary
An object of the present invention is to provide a liquid crystal display device where there are fewer moiré effects between lenticular lenses and the backlight. The present invention provides a liquid crystal display device where the arrangement or form of lenticular lenses 1 varies in waveform so that the center line of the lenses, the width of the lenses, and the height of the lenses vary in the case where light emitted from a backlight 59 is collected into openings 15 for transmitting light by means of lenticular lenses 1.