Backlight Module Non-Overlapping Light Structures
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Solution Overview
Problem
Conventional backlight modules face challenges in achieving improved color gamut and chromaticity parameters due to thickness limitations of color resist and difficulties in arranging small-pitch light-emitting structures, which affect manufacturing yield and cost.
Innovation Solution
A backlight module design featuring light-emitting units with non-overlapping first, second, and third light-emitting structures disposed on at least two opposing substrates, increasing pitch between structures to reduce manufacturing difficulties and costs, while enabling the emission of primary colors without color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an array of light-emitting structures is disposed directly on the substrate to emit color light, then color gamut and chromaticity parameters are improved, but the pitch between light-emitting structures must be set small making arrangement difficult and manufacturing yield decreases
Solution Approach 1:
The invention divides the light-emitting structures into three separate arrays corresponding to red, green, and blue primary colors, with each array disposed on a separate substrate. This segmentation allows each color array to be manufactured and arranged independently, avoiding the complexity of arranging densely packed multi-color structures while maintaining excellent color gamut and chromaticity parameters.
2Illumination intensity
If the pitch between light-emitting structures is set small to improve color display, then color gamut is improved, but the arrangement of multiple small-pitch structures becomes difficult and manufacturing cost increases
Solution Approach 1:
The invention transitions from arranging multiple colors in a planar two-dimensional array to a three-dimensional stacked configuration where red, green, and blue light-emitting structures are disposed on separate substrates at different spatial levels. This dimensional change allows each color array to have adequate pitch for easy manufacturing while achieving excellent color gamut through the stacked configuration.
Data Source
AI summary
The present disclosure provides a backlight module and a display module. The backlight module includes a plurality of light-emitting units arranged in an array. Each light-emitting unit includes a first light-emitting structure, a second light-emitting structure, and a third light-emitting structure. The first light-emitting structure, the second light-emitting structure, and the third light-emitting structure are respectively disposed on at least two substrates that are arranged opposite to each other. Light emitted by the first light-emitting structure, light emitted by the second light-emitting structure, and light emitted by the third light-emitting structure are unoverlapped with each other.