LED Light Bar Backlight Module Central Brightness
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Solution Overview
Problem
Conventional light bars in backlight modules suffer from inconsistent central point brightness and illumination homogeneity, limiting the optical quality and being costly due to the use of identical LED lamps with fixed spacing.
Innovation Solution
A method involving LED lamps of varying specifications, with luminous intensity differences less than 20%, are strategically positioned and spaced on a PCB to enhance central point brightness and illumination homogeneity, adjusting the spacing to meet specific requirements, and soldered to form an LED light bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If identical LED lamps with fixed spacing are used, then manufacturing process is simple, but central point brightness and illumination homogeneity are poor
Solution Approach 1:
The patent applies local quality by using LED lamps of different specifications (different luminous intensities) at different positions on the PCB. Specifically, LED lamps with higher luminous intensity are placed at positions closer to the central location of the backlight module, while LED lamps with lower luminous intensity are placed at positions farther from the center. This non-uniform arrangement compensates for the natural light decay from edges to center, thereby improving central point brightness and illumination homogeneity without significantly complicating the manufacturing process.
2Device complexity
If identical LED lamps with fixed spacing are used, then device structure is simple, but illumination homogeneity is poor
Solution Approach 1:
The patent implements local quality by varying the luminous intensity of LED lamps according to their positions. The selection of LED lamps with different specifications based on their locations on the PCB creates a non-uniform light distribution pattern that improves overall illumination homogeneity. This approach maintains relatively simple device structure while achieving better optical performance.
3Illumination intensity
If LED lamps of various specifications are used with adjusted spacing, then central point brightness and illumination homogeneity are improved, but manufacturing complexity increases
Solution Approach 1:
The patent resolves this contradiction by applying local quality principles - selecting LED lamps of different specifications (different luminous intensities) and arranging them at different spacing intervals based on their positions relative to the backlight module center. This targeted approach improves central point brightness and illumination homogeneity while keeping the manufacturing process complexity manageable through systematic arrangement patterns.
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 improves central point brightness and illumination homogeneity, enhancing the optical grade of the backlight module while reducing manufacturing costs by using diverse and cost-effective LED lamps.
Implementation Method 1
a plurality of light-emitting diode (LED) lamps 200 mounted to the PCB 100
Data Source
AI summary
The present invention provides a method for mounting light bar that enhances central point brightness of backlight module, which includes (1) providing a PCB and LED lamps of different luminous intensities among which the difference is less than 20%; (2) positioning the LED lamps on the PCB in a spaced manner and electrically connected to the PCB; (3) providing a backlight module main body; (4) positioning the PCB with the LED lamps on the backlight module main body to form a the backlight module; (5) measuring central point brightness and illumination homogeneity; (6) adjusting the spacing distance between the LED lamps according to predetermined central point brightness and illumination homogeneity so as to have the central point brightness and illumination homogeneity of the LED lamps satisfying requirements; and (7) mounting the LED lamps to the PCB so as to form an LED light bar.