Segmented Optical Films for LCD Brightness Contrast
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Solution Overview
Problem
Current backlight modules for LCDs suffer from low brightness contrast, narrow viewing angle, and poor light output efficiency.
Innovation Solution
The proposed backlight module includes a base layer with a light source and multiple optical films, specifically designed to enhance brightness contrast, light output, and viewing angle by using prism structures and micro-structures on the optical films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional backlight modules are used, then the structure is simple, but the brightness contrast is low and viewing angle is narrow
Solution Approach 1:
The optical film is divided into multiple independent regions: a first region with a first prism structure, a second region with a second prism structure, and a third region with micro-structures. Each region serves a specific optical function, allowing the system to achieve high brightness contrast and wide viewing angle through coordinated action of segmented components rather than a single complex structure.
Solution Approach 2:
The patent introduces prism structures with specific vertex angles (θ1 for first prism, θ2 for second prism) and micro-structures that operate in different spatial dimensions and orientations. These multi-dimensional optical elements manipulate light propagation in various directions, enabling wide viewing angles and high brightness contrast that cannot be achieved with conventional planar structures.
2Productivity
If conventional backlight modules are used, then the manufacturing process is simple, but the light output efficiency is poor
Solution Approach 1:
Different regions of the optical film are designed with locally optimized structures: the first region has a first prism structure with vertex angle θ1, the second region has a second prism structure with vertex angle θ2, and the third region has micro-structures. Each local region is tailored to optimize specific optical functions, maximizing overall light output efficiency while maintaining manufacturability through modular design.
3Adaptability or versatility
If conventional backlight modules are used, then the device is compact, but the viewing angle is narrow
Solution Approach 1:
The optical film is segmented into three functional regions with different structures (first prism, second prism, and micro-structures), each contributing to expanding the viewing angle in different directions. This segmentation allows the compact device to achieve wide viewing angles through coordinated optical manipulation rather than increasing physical size.
Solution Approach 2:
The patent employs prism structures with specific vertex angles (θ1 and θ2) and micro-structures that manipulate light in multiple spatial dimensions. These multi-dimensional optical elements expand the effective viewing angle without increasing the device footprint, resolving the contradiction between compactness and viewing angle versatility.
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 achieves a significant increase in brightness contrast and light output efficiency, expanding the viewing angle and improving visual effects in LCDs.
Implementation Method 1
a first prism structure 41... a second prism structure 61
Implementation Method 2
a first prism structure 41... a second prism structure 61
Implementation Method 3
micro-structures 62
Data Source
AI summary
An electronic device includes a base layer; a light source disposed on the base layer; and a plurality of optical films disposed on the base layer, wherein the electronic device respectively has a first brightness value, a second brightness value and a third brightness value, which satisfy:<semantics definitionURL="">❘<annotation encoding="Mathematica">"\[LeftBracketingBar]"</annotation></semantics>[(A/C)-(B/C)]×100%<semantics definitionURL="">❘<annotation encoding="Mathematica">"\[RightBracketingBar]"</annotation></semantics>≧10%,where A, B and C represents the first, second and third brightness values, respectively, the first brightness value is a second maximum brightness value of the electronic device, the second brightness value is a minimum brightness value of the electronic device, and the third brightness value is a maximum brightness value of the electronic device.