Spliced Backlight Module with Dot Pattern Reflectors for Large LCDs
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Solution Overview
Problem
Conventional TFT-LCDs face challenges in manufacturing displays larger than 100 inches due to difficulties in bending quantum dot tubes and light guide plates, restricting the size of displays that can be fabricated.
Innovation Solution
A backlight module design comprising a bezel, a combinational backlight unit with spliced sub-backlight units, an optical component, and dot pattern reflectors, which allows for the placement of quantum dots between sub-units, reducing light reflectivity and enabling larger display sizes with improved brightness and contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single large light guide plate and quantum dot tube are used, then display size can be increased, but manufacturing complexity and difficulty of bending increase
Solution Approach 1:
The patent divides the backlight module into multiple sub-backlight units, each with its own light guide plate and quantum dot tube. These modular units can be manufactured separately with standard bending equipment, then spliced together to form large displays. This segmentation resolves the contradiction by enabling large display areas while maintaining ease of manufacture through standardized, smaller components.
2Ease of manufacture
If sub-backlight units are spliced together, then manufacturing ease improves, but light reflectivity at gaps increases
Solution Approach 1:
The patent introduces dot pattern reflectors as intermediary elements positioned at the gaps between spliced sub-backlight units. These reflectors with specific dot patterns are designed to manage and redirect light that would otherwise be reflected harmfully at the splice gaps. This intermediary structure resolves the contradiction by maintaining the manufacturing advantages of spliced units while eliminating the harmful light reflectivity through optical management.
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 enables the production of larger displays with reduced manufacturing complexity and cost, improved light evenness, and enhanced brightness and contrast by splicing sub-backlight units and using dot pattern reflectors to manage light reflectivity.
Implementation Method 1
The light source stuck on a lateral side of the circuit board and supplying the incident surface of the LGP with an incident light
Implementation Method 2
The plurality of dot pattern reflectors are arranged on top of the gap between the adjacent sub-backlight units, respectively for reducing reflectivity of light at the gap
Data Source
AI summary
The present invention proposes an LCD and a backlight module thereof. A combinational backlight unit is arranged on a lower portion inside a bezel. The combinational backlight unit includes sub-backlight units spliced at intervals. An optical component is arranged on an upper portion inside the bezel and placed on top of the combinational backlight unit at intervals. Dot pattern reflectors are arranged on top of the gap between the adjacent sub-backlight units for reducing reflectivity of light at the gap. The backlight module used in the LCD lessens the difficulty in bending the LGP in the display with a large curve screen, so that a QD tube is suitable for a display with an extremely large size and improving the brightness and contrast of high backlight.