Backlight Unit With Mixed Color Coordinates
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Solution Overview
Problem
Existing backlight units for liquid crystal display devices face challenges in achieving improved yield and manufacturing efficiency, particularly in providing uniform white light with varying color coordinates, which affects the display quality and production costs.
Innovation Solution
The implementation of a backlight unit design that includes multiple light source units with different color coordinates and luminous intensities, arranged alternately on a light source driving substrate, where each unit emits white light by mixing colored lights, allowing for uniform white color coordination and improved light utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple light sources with different color coordinates are used, then manufacturing yield is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by creating different light source units with specific color coordinates at different locations on the light source driving substrate. Each light source unit is configured with specific first and second light sources having predetermined color coordinates, allowing local optimization of white color coordinates across different regions while improving overall manufacturing yield through classification and matching.
Solution Approach 2:
The patent segments the backlight unit into multiple light source units, where each unit contains specific combinations of light sources with different color coordinates. This segmentation allows independent classification and arrangement of light source units based on their white color coordinates, enabling flexible configuration to improve manufacturing yield without requiring complete redesign of the entire system.
2Stability of the object's composition
If light sources with varying color coordinates are arranged alternately, then uniformity of white color light is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes parameter changes by systematically varying the color coordinates of light sources within predetermined ranges to create different light source units. By controlling and adjusting parameters such as the color coordinates of first and second light sources, the patent achieves uniform white color light output while maintaining manageable manufacturing precision requirements through classification and matching approaches.
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 approach enhances the yield and reduces manufacturing costs by providing uniform white color light across the display panel, improving display quality and efficiency in the production process.
Implementation Method 1
a first light source emitting a first light having a first color and a second light source emitting a second light having a second color. The first light source unit emits a first white color light having a first white color coordinate, which is obtained by mixing the first light and the second light
Implementation Method 2
a third light source emitting a third light having the first color and a fourth light source emitting a fourth light having the second color. The second light source unit emits a second white color light having a second white color coordinate, which is obtained by mixing the third light and the fourth light
Data Source
AI summary
A backlight unit that includes a light source driving substrate and first and second light source units connected to the light source driving substrate. The first light source unit includes first and second light sources respectively emitting a first light having a first color and a second light having a second color. The second light source unit may include third and fourth light sources respectively emitting a third light having the first color and a fourth light having the second color. The first light source unit emits a first white color light having a first white color coordinate by mixing the first light and the second light and the second light source unit emits a second white color light having a second white color coordinate by mixing the third light and the fourth light. The first and second white color coordinates belong to different white color coordinate areas.