Mini-LED Backlight Reflective Layer Layout for Higher Light Output
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Solution Overview
Problem
Conventional mini-LED backlight modules have lower light-outputting efficiency, which hinders the achievement of ultra-narrow frames and increased thickness in liquid crystal display devices.
Innovation Solution
A backlight module design featuring a substrate with a light-emitting chip and a reflective layer, where the reflective layer includes a hollowed-out region, allowing light to be reflected and emitted efficiently, thereby enhancing luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional mini-LED backlight module is used, then the liquid crystal display device can achieve ultra-narrow frame and reduced thickness, but the light-outputting efficiency is lower
Solution Approach 1:
The patent converts the harmful light loss that occurs when light directly hits the substrate into a beneficial effect by introducing a reflective layer. This reflective layer captures the originally lost light and redirects it toward the display panel, transforming energy waste into useful illumination and improving overall light-outputting efficiency
Solution Approach 2:
The patent introduces a vertical dimension to light management by adding a reflective layer at the bottom of the substrate. This creates a new optical path dimension, allowing light to be reflected upward from the substrate layer toward the display panel, thereby increasing light utilization without occupying lateral space
2Illumination intensity
If the reflective layer is positioned close to the light-emitting chip, then the structure is compact, but the light reflection effect is reduced
Solution Approach 1:
The patent optimizes the vertical position parameter of the reflective layer within the substrate, finding the optimal balance point that ensures sufficient distance for effective light reflection while maintaining a compact overall structure. This parameter optimization allows the reflective layer to be positioned at a height that maximizes light reflection intensity without excessive vertical space consumption
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 design improves the luminous efficiency of the backlight module by reflecting and emitting light from the light-emitting chip, enabling thinner and more efficient liquid crystal display devices with ultra-narrow frames.
Implementation Method 1
the reflective layer includes a hollowed-out region, the light-emitting chip is electrically connected to the substrate in the hollowed-out region... a projection of an edge of the hollowed-out region on the substrate is at least partially positioned within a coverage of a projection of the light-emitting chip on the substrate... The design improves the luminous efficiency of the backlight module by reflecting and emitting light from the light-emitting chip
Data Source
AI summary
The application provides a backlight module, a manufacturing method thereof, and a liquid crystal display device. The backlight module includes a substrate, and a light-emitting chip and a reflective layer disposed on the substrate. Wherein, the reflective layer has a hollowed-out region, the light-emitting chip is electrically connected to the substrate in the hollowed-out region, and a projection of an edge of the hollowed-out region on the substrate is at least partially within a coverage of a projection of the light-emitting chip on the substrate to improve luminous efficiency.