Mosaic Screen Backlight Layout for Center Brightness Uniformity
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Solution Overview
Problem
The mosaic screen exhibits poor uniformity of brightness due to the center area being relatively far from the backlight module, resulting in lower brightness in this region.
Innovation Solution
The backlight module comprises lamp panels with a light source fixed on an inclined light source fixing plate, forming an included angle with the baseplate, which directs light to the center area, improving brightness and uniformity. Additionally, the use of COB LEDs with adjustable numbers and power distribution across the lamp panels enhances light distribution and reduces glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a diffuser plate is used to provide light for all display modules, then the backlight coverage is improved, but the brightness uniformity deteriorates due to the center area being far from the backlight module
Solution Approach 1:
The patent divides the single diffuser plate into multiple reflective plates positioned at different locations (first reflective plate near the first side wall, second reflective plate near the second side wall, etc.). Each reflective plate independently directs light to specific display modules, ensuring uniform brightness distribution across the entire screen while maintaining comprehensive backlight coverage.
Solution Approach 2:
The patent transitions from a single-plane diffuser plate to a three-dimensional arrangement of multiple reflective plates positioned at different spatial locations and angles. This dimensional change allows light to be reflected from multiple directions, improving both coverage area and brightness uniformity by directing light paths to reach the center area more effectively.
2Illumination intensity
If a diffuser plate is used to distribute light uniformly, then the light distribution is improved, but visual shadows and support difficulties occur
Solution Approach 1:
The patent uses multiple reflective plates that replicate and redirect light paths to different areas of the display screen. Each reflective plate creates a copied light path that mimics the function of a diffuser plate but without the visual shadowing effect, as the reflective surfaces are positioned and angled to avoid direct line-of-sight shadows from the light source.
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 configuration increases the amount of light reflected to the center area, achieving improved brightness and uniformity while reducing power consumption and avoiding issues associated with diffuser plates, such as support difficulties and visual shadowing.
Implementation Method 1
enabling the light emitted by the light source to irradiate to the center area of the box bottom and be reflected
Data Source
AI summary
The present disclosure discloses a mosaic screen. The mosaic screen comprises a box body, a backlight module and a plurality of display modules spliced with each other. The box body comprises four side walls and one box bottom. The plurality of display modules and the box bottom are oppositely fixed on the box body. The backlight module comprises a plurality of lamp panels arranged on the four side walls. Each of the lamp panels comprises: a baseplate, a light source fixing plate, and a light source fixed on the light source fixing plate. The light source fixing plate is connected with a first side of the baseplate close to the display modules, and forms an included angle with the baseplate.