Transreflective Color Filter with Substrate Concaves for Brightness Saturation Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Transreflective color filters face a challenge in balancing brightness and color saturation, as increasing film thickness enhances color saturation but reduces brightness, while decreasing thickness improves brightness at the expense of color saturation.
Innovation Solution
A transreflective color filter design featuring concaves on the substrate corresponding to transmissive portions of color resin layers, allowing the transmissive portions to fill these concaves, thereby adjusting the thickness of reflective and transmissive portions to balance brightness and color saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the thickness of the color film is increased, then the color saturation is improved, but the brightness is reduced due to increased absorption
Solution Approach 1:
The patent introduces a vertical dimension by forming concaves in the substrate, allowing the color film thickness to vary in the depth direction. This creates different optical paths for light passing through different regions, enabling simultaneous optimization of color saturation (in thicker reflective regions) and brightness (in thinner transmissive regions) without compromising either parameter.
Solution Approach 2:
The color film is designed with spatially varying thickness: thicker portions over concave regions for high color saturation in reflective mode, and thinner portions in raised regions for high brightness in transmissive mode. This local differentiation allows each region to be optimized for its specific function, resolving the global contradiction between saturation and brightness.
2Illumination intensity
If the thickness of the color filter is reduced, then the brightness is improved, but the color saturation is reduced
Solution Approach 1:
By utilizing the vertical dimension through substrate concaves, the patent enables the color film to have different effective thicknesses for different optical functions. The raised regions provide minimal absorption for high brightness, while the concave regions provide sufficient path length for high saturation, eliminating the need to compromise between the two parameters.
Solution Approach 2:
The color filter is segmented into functionally distinct regions: raised portions for brightness optimization and concave portions for saturation optimization. This segmentation allows independent optimization of each region's thickness to serve its specific purpose, resolving the contradiction at the system level.
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 design effectively reduces the thickness of the color filter while optimizing brightness and color saturation, making it suitable for use in both indoor and outdoor environments and in slim electronic products.
Implementation Method 1
increasing the thickness of a color film can increase the color saturation, but the brightness will be reduced because of increase of absorption
Implementation Method 2
in the outdoor environment, sunlight enters the transreflective color filters and then is reflected, and thereby relative bright color images can also be obtained
Data Source
AI summary
The invention provides a transreflective color filter and a method for manufacturing the same, and a liquid crystal display device. The transreflective color filter comprises a substrate and color resin layers formed on the substrate, wherein the color resin layers include transmissive portions and reflective portions, regions of the substrate corresponding to the transmissive portions have concaves formed therein, and a part of the transmissive portion fills the concave.