Liquid Crystal Device Lattice Light Shielding Lens Segmentation
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Solution Overview
Problem
In transmissive liquid crystal devices, particularly in projection-type display apparatuses, miniaturized pixels face challenges in efficiently guiding light to the light transmission area due to the limitations of existing lens configurations, leading to inefficient light utilization and potential vignetting.
Innovation Solution
The liquid crystal device incorporates a first substrate without a light shielding member in the display region, a liquid crystal layer, and a second substrate with a light shielding member in a lattice shape, along with multiple lens members strategically positioned between the substrate body, light shielding member, and pixel electrodes to optimize light guidance and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixels are miniaturized to increase display resolution, then display quality is improved, but light guidance efficiency deteriorates
Solution Approach 1:
The patent divides the light guidance function into three separate lens members (first lens member between substrate body and light shielding member, second lens member between light shielding member and pixel electrode, third lens member between second lens member and pixel electrode) instead of using a single lens. This segmentation allows each lens to be optimized for its specific function and position, improving overall light guidance efficiency even with miniaturized pixels
Solution Approach 2:
The patent introduces a third lens member in the optical path, adding a dimensional aspect to the light guidance system. By stacking multiple lens members at different positions and orientations, the system achieves better light control in three-dimensional space, which is crucial for maintaining efficiency with smaller pixel dimensions
2Device complexity
If only a second lens is provided between pixel electrodes and light shielding member, then device complexity is reduced, but light guidance efficiency deteriorates with miniaturized pixels
Solution Approach 1:
The light guidance function is segmented across three lens members positioned at different locations in the optical path. The first lens member is positioned between the substrate body and light shielding member, the second lens member between the light shielding member and pixel electrode, and the third lens member between the second lens member and pixel electrode. This segmentation enables optimized light control at each stage
Solution Approach 2:
The first lens member acts as an intermediary element that pre-conditiones light before it reaches the light shielding member. By positioning this lens member earlier in the optical path, the system can guide light more effectively through the lattice structure of the light shielding member, reducing losses before light reaches the pixel electrodes
3Illumination intensity
If light shielding member is provided between substrate body and pixel electrodes, then display contrast is improved, but light transmission efficiency deteriorates
Solution Approach 1:
The light shielding member is configured with a lattice structure that provides different properties in different regions. The lattice pattern allows light to pass through light transmission areas while blocking light in non-transmission areas, achieving high contrast. The three lens members are strategically positioned to guide light precisely to these local transmission regions, maximizing the utility of the light shielding member's selective blocking property
Solution Approach 2:
The light shielding member, which inherently blocks light and could be seen as causing loss, is actually converted into a beneficial element. By combining the lattice-shaped light shielding member with the three-lens guidance system, the blocked light is redirected and concentrated into the light transmission areas, transforming the blocking function into an opportunity for enhanced light concentration and contrast improvement
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 enhances light efficiency, allowing for a brighter and higher-quality image display by efficiently guiding light to the transmissive region and minimizing vignetting, thereby improving the overall performance of the liquid crystal device in projection-type display applications.
Implementation Method 1
a first lens member provided at a layer between the substrate body and the light shielding member, a second lens member provided at a layer between the light shielding member and the pixel electrode, and a third lens member provided at a layer between the second lens member and the pixel electrode
Data Source
AI summary
A liquid crystal device includes a first substrate arranged on a light incident side and a second substrate that faces the first substrate through intermediation of a liquid crystal layer. A light shielding member is not provided in a display region of the first substrate. In a display region of the second substrate, a light shielding member in a lattice shape is provided between a substrate body and a pixel electrode. The second substrate includes a first lens member provided between the substrate body and the light shielding member, a second lens member provided between the light shielding member and the pixel electrode, and a third lens member provided between the second lens member and the pixel electrode. The liquid crystal device includes an optical compensation member on a light incident side of the third lens member.