Backlight Module Light Coupling Unit Segmentation
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Solution Overview
Problem
Conventional backlight modules with reflective cavities have weak structural strength, are difficult to manufacture in large quantities, and face assembly challenges due to their hollow structure and complex design, making them unsuitable for compact LCD devices.
Innovation Solution
A backlight module with a light coupling unit composed of multiple light coupling devices arranged in a side-by-side manner, featuring a solid structure with gradually decreasing thickness and joint parts for easy assembly, enhancing structural strength and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reflective cavity with hollow structure is used to direct light, then the light coupling function is achieved, but the structural strength becomes weak and deformation occurs easily
Solution Approach 1:
The light coupling unit is divided into multiple light coupling devices arranged in a side-by-side manner, where each device has a first side and a second side. This segmentation allows the structure to maintain strength while reducing complexity of individual components
Solution Approach 2:
The light coupling devices have thickness that gradually decreases from the first side toward the second side, creating a wedge-shaped profile. This dimensional variation enables light redirection functionality while maintaining structural integrity through the solid construction
2Ease of manufacture
If a reflective cavity with larger size is used, then the light coupling function is achieved, but the manufacture process becomes complicated and mass production is difficult
Solution Approach 1:
The light coupling unit is segmented into multiple smaller light coupling devices that can be manufactured independently and then assembled together, simplifying the manufacturing process and enabling mass production while maintaining the required optical coupling function
Solution Approach 2:
Instead of using a single large reflective cavity, the invention uses multiple smaller light coupling devices that collectively provide the light coupling function, making manufacturing easier and more suitable for mass production
3Ease of operation
If a reflective cavity is used, then the light coupling function is achieved, but the assembly to light guide plate becomes difficult and assembly efficiency is poor
Solution Approach 1:
The light coupling unit is divided into multiple light coupling devices with standardized first and second sides, allowing for simplified assembly procedures. The segmented structure enables easier alignment and attachment to the light guide plate compared to a single complex reflective cavity
Solution Approach 2:
The invention uses multiple smaller light coupling devices instead of one large reflective cavity, which simplifies the assembly process by allowing incremental installation and better alignment with the light guide plate, thereby improving assembly efficiency
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 provides a robust and easily producible light coupling unit that maintains structural integrity and simplifies assembly with the light guide plate, addressing the weaknesses of conventional designs while enabling compact form factors for LCD devices.
Implementation Method 1
Each light coupling device is configured to have a thickness gradually decreasing from the first side toward the second side... configured to direct the light provided from the light sources 130 to the inside of the light guide plate 110
Data Source
AI summary
A backlight module includes a light guide plate, a light coupling unit and a plurality of light emitting devices. The light guide plate has a light incident side. The light coupling unit includes a plurality of light coupling devices arranged in a side-by-side manner. Each light coupling device has a first side and a second side, and the first and second sides are opposite to each other. The second side is adjacent to the light incident side. Each light coupling device is configured to have a thickness gradually decreasing from the first side toward the second side. The light emitting devices are disposed beside the first sides of the light coupling devices. Another backlight module is also provided.