Transparent Display Light Guide with Polymer Network
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Solution Overview
Problem
Current transparent liquid crystal display devices based on LCD have low light transmittance and contrast due to the low light transmittance of the display panel, leading to poor display uniformity and image quality.
Innovation Solution
A transparent display device is designed with a liquid crystal display panel, a light guide component, and a light source, where the light guide component diffuses light to form a surface light source that enters the liquid crystal display panel at an angle greater than the total reflection critical angle, ensuring light is not emitted into the air and improving uniformity and contrast by using a polymer network and optical microstructures within the light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a lamphouse is arranged at the top rear of the display panel to provide light, then the display panel can be illuminated, but the light transmittance is low and the contrast is poor
Solution Approach 1:
The patent changes the light source arrangement from a rear-positioned lamphouse to a side-positioned light guide component. This dimensional repositioning allows light to enter the liquid crystal layer from the side, improving both light transmittance and display contrast by optimizing the light path through the display panel.
Solution Approach 2:
The patent introduces optical microstructures (prisms, gratings, or roughened surfaces) at specific locations on the light guide component to locally modify light distribution. These microstructures create regions with different optical properties, enhancing light extraction and improving display contrast in specific areas of the display panel.
2Productivity
If light enters the liquid crystal display panel at a small angle, then light can pass through easily, but light is emitted into the air reducing display uniformity
Solution Approach 1:
The patent changes the incident angle parameter of light entering the liquid crystal display panel from a small angle to a large angle (greater than the critical angle for total internal reflection). This parameter change ensures light is reflected back into the display panel rather than escaping to air, improving display uniformity while maintaining efficient light transmission through multiple internal reflections.
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 enhances light transmittance and contrast, improving display uniformity and image quality by ensuring light is uniformly distributed and scattered within the liquid crystal layer when an electric field is applied, while maintaining transparency when no voltage is applied.
Implementation Method 1
light from the light source is totally reflected at the liquid crystal display panel without being emitted out from a side of the second substrate opposite to the first substrate into the outside air
Implementation Method 2
a plurality of optical microstructures formed inside the light guide plate body; the optical microstructures are configured to reflect light from the light source to exit the light guide plate body
Implementation Method 3
a liquid crystal layer positioned between the first substrate and the second substrate, wherein the liquid crystal layer includes a polymer network formed of polymerizable monomers
Data Source
AI summary
An embodiment of the present disclosure provides a display device, including: a liquid crystal display panel, comprising a liquid crystal layer including a polymer network formed of a polymerizable monomer; a light guide component, wherein the light guide component is configured such that light from the light source is emitted out from the first surface of the light guide component into the liquid crystal display panel, and in a case that the liquid crystal layer is not applied with a voltage, light from the light source is totally reflected at the liquid crystal display panel without being emitted from a side of the second substrate opposite to the first substrate into the outside air.