Backlight Diffusion Plate With Prism and Bubbles for Fewer Optical Sheets
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Solution Overview
Problem
Existing display devices face challenges in efficiently transmitting light to the liquid crystal panel while minimizing the number of optical sheets to reduce manufacturing costs and thickness.
Innovation Solution
A backlight unit with a diffusion plate featuring prism irregularities on its front surface and bubbles inside, along with optional rear surface irregularity patterns, reduces the need for multiple prism sheets by integrating their functions into a single component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple optical sheets are used to transmit light to the liquid crystal panel, then light transmission effectiveness is improved, but manufacturing cost increases and device thickness increases
Solution Approach 1:
The patent combines multiple optical sheet functions (diffusion, prism, and bubble structures) into a single integrated diffusion plate. This merging eliminates the need for separate optical sheets, reducing device complexity and manufacturing cost while maintaining effective light transmission to the liquid crystal panel
Solution Approach 2:
The diffusion plate is designed to perform multiple optical functions simultaneously: it diffuses light, creates prism effects for light direction control, and incorporates bubble structures for additional light scattering. This multi-functionality replaces what previously required multiple separate optical sheets
2Illumination intensity
If multiple optical sheets are used to transmit light, then light transmission effectiveness is improved, but manufacturing cost increases
Solution Approach 1:
By merging multiple optical sheet functions into one diffusion plate, the patent reduces the number of manufacturing steps, materials needed, and assembly operations. This integration significantly lowers manufacturing cost while preserving light transmission effectiveness
Solution Approach 2:
The multi-functional diffusion plate consolidates what previously required multiple specialized components, reducing material costs, manufacturing complexity, and assembly costs while maintaining the necessary optical performance
3Illumination intensity
If multiple optical sheets are used, then light transmission effectiveness is improved, but thickness of the backlight unit increases
Solution Approach 1:
The patent merges multiple optical sheets into a single thin diffusion plate, eliminating the cumulative thickness of multiple layers while maintaining the combined optical functions. This significantly reduces the overall thickness of the backlight unit
4Device complexity
If the number of optical sheets is reduced, then manufacturing cost decreases and thickness is reduced, but light transmission effectiveness may deteriorate
Solution Approach 1:
The diffusion plate incorporates multiple optical functions (diffusion, prism, bubble structures) that work together to maintain effective light transmission. This multi-functionality compensates for the reduction in the number of optical sheets, preventing deterioration of light transmission effectiveness
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 enhances brightness, reduces thickness, and lowers failure rates while maintaining cost competitiveness by minimizing the number of optical sheets.
Implementation Method 1
a plurality of prism irregularities formed on the front surface of the diffusion plate
Implementation Method 2
a plurality of bubbles positioned inside the diffusion plate
Data Source
AI summary
Provided is a backlight unit including a light assembly, a diffusion plate that emits incident light of the light assembly forward, and an optical sheet positioned on a front surface of the diffusion plate, wherein the diffusion plate includes a plurality of prism irregularities formed on the front surface thereof, and a plurality of bubbles positioned inside the diffusion plate.