Backlight Polarization Layer with Embossed Grooves
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Solution Overview
Problem
Conventional liquid crystal display devices face challenges in achieving high-quality images with high definition, brightness, and large size while maintaining light weight, compactness, and low power consumption, and the separate manufacturing and assembly of polarization plates complicate the manufacturing process and can lead to defective assemblies.
Innovation Solution
A backlight unit with a polarization layer having an embossed pattern of protrusions and grooves is integrated onto the upper surface of the light guide plate or surface emission lamp, simplifying the manufacturing process by eliminating the need for separate polarization plates and enhancing assembly conformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate polarization plates are manufactured and assembled, then the polarization function is achieved, but the manufacturing process becomes complex and assembly quality deteriorates
Solution Approach 1:
The polarization layer is integrated directly onto the light guide plate, merging two separate components (polarization plate and light guide plate) into a single unified structure. This eliminates the need for separate manufacturing and assembly steps, thereby simplifying the manufacturing process and improving assembly quality by removing potential defects from separate assembly operations.
2Productivity
If conventional polarization plates are used, then the backlight unit can be assembled, but the manufacturing efficiency decreases due to separate production steps
Solution Approach 1:
By combining the polarization layer with the light guide plate into a single integrated component, the number of manufacturing steps is reduced. The polarization function is built-in during the light guide plate fabrication process, eliminating separate polarization plate production and assembly operations, thereby significantly improving manufacturing efficiency and ease of manufacture.
3Reliability
If separate polarization plates are assembled, then the polarization function is achieved, but the risk of defective assemblies increases
Solution Approach 1:
The polarization layer is integrated directly onto the light guide plate, merging two separate components (polarization plate and light guide plate) into a single unified structure. This eliminates the need for separate manufacturing and assembly steps, thereby simplifying the manufacturing process and improving assembly quality by removing potential defects from separate assembly operations.
Solution Approach 2:
The polarization function is extracted as an inherent property of the light guide plate structure itself, rather than being a separate attached component. This integration removes the polarization plate from the assembly process, eliminating associated risks of misalignment, adhesion failures, and assembly defects.
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 solution simplifies the manufacturing process and improves the assembly quality of liquid crystal display devices by directly forming the polarization layer on the backlight unit, allowing for more efficient production of high-quality images with enhanced light management.
Implementation Method 1
a polarization layer 31a on an upper surface of the light guide plate 30... The upper and lower polarization plates 12 and 13 are respectively coated on the outer surfaces of the upper and lower substrates in a direction that transmission axes (absorption axes) thereof cross each other.
Data Source
AI summary
A backlight unit includes a light guide plate, at least one lamp provided at one or both sides of the light guide plate, a lamp housing surrounding the lamp, a lamp reflection plate positioned under the light guide plate to reflect light emitted from the lamp towards the light guide plate, and a polarization layer on an upper surface of the light guide plate and having an embossed pattern of protrusions and grooves on an upper surface thereof. A method for forming the backlight unit and a liquid crystal display device comprising the same are also disclosed.