Prism Reflector Lamp Guides Backlight Uniformity
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Solution Overview
Problem
Direct-type LCD devices face challenges in achieving uniform brightness due to darker regions between lamps and visible lamp guides, which affect display quality as devices slim down.
Innovation Solution
A prism reflector with inclined surfaces and integral lamp guides is used to position and secure lamps, ensuring even light distribution and reducing shadow formation, thereby enhancing brightness and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If direct-type backlight is used to increase brightness, then brightness is improved, but darker regions occur between lamps and lamp guides become visible
Solution Approach 1:
The backlight unit is divided into multiple independent lamp modules, each with its own lamp guide and reflective plate. This segmentation allows each lamp to be positioned and controlled independently, enabling uniform brightness distribution across the entire display area while avoiding the darker regions that occur with single-row lamp arrangements.
Solution Approach 2:
The patent transitions from a single-row lamp arrangement to a multi-dimensional layout where lamps are arranged in multiple rows and columns. This spatial reconfiguration, combined with the prism reflector that redirects light at multiple angles, eliminates the darker regions between lamps and achieves uniform brightness across the display.
2Manufacturing precision
If lamp guides are used to fix lamps, then lamp positioning is improved, but lamp guides become visually visible and reduce quality
Solution Approach 1:
The lamp guide structure is merged with the reflective plate into a single integrated component. The lamp guide protrusions are formed as part of the reflective plate structure, eliminating the need for separate lamp guide elements that would be visible. This integration maintains precise lamp positioning while removing the visual imperfections caused by separate lamp guide components.
Solution Approach 2:
The reflective plate serves multiple functions simultaneously: it reflects light from the lamps, provides structural support, and acts as the lamp guide through its integrated protrusions. This multi-functionality eliminates the need for separate components, reducing visual imperfections while maintaining positioning precision.
3Adaptability or versatility
If multiple separate components are used for backlight assembly, then functionality is improved, but assembly complexity increases
Solution Approach 1:
Multiple separate components including the reflective plate, lamp guide, and support structures are merged into a single integrated assembly. The prism reflector with integrated lamp guide protrusions eliminates the need for separate mounting brackets and alignment components, significantly simplifying the assembly process while maintaining all necessary functional capabilities.
Solution Approach 2:
The integrated reflective plate structure performs multiple functions that previously required separate components: light reflection, lamp positioning, structural support, and alignment. This multi-functionality reduces the number of parts and simplifies assembly while preserving the adaptability and functional performance of the backlight system.
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 solution ensures uniform brightness and improved aesthetic quality by reflecting light between lamps and simplifying the assembly process through integrated lamp guides, reducing material costs and visual imperfections.
Implementation Method 1
a prism reflector with inclined surfaces and integral lamp guides is used to position and secure lamps, ensuring even light distribution and reducing shadow formation
Data Source
AI summary
A backlight unit for a liquid crystal device are disclosed for improving the brightness of the liquid crystal display. The backlight unit includes a plurality of lamps, a prism reflector, and a plurality of lamp guides. The prism reflector forms a plurality of prism peaks for positioning the plurality of lamps. The plurality of lamp guides fix the plurality of lamps at a predetermined distance apart from each other.