LCD Light Source Unit Modular Mounting for Repair
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Solution Overview
Problem
Conventional liquid crystal displays require complete disassembly for replacing the light source unit, making repairs inconvenient and inefficient, and suffer from suboptimal light emitting efficiency due to the design of the backlight module.
Innovation Solution
A modular design for the liquid crystal display where the light source unit is detachably mounted into an accommodation space within the backlight module, utilizing a securing mechanism with a recess and pin system or protrusion units to facilitate easy replacement and improve light incident efficiency by ensuring proper alignment and support of point light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the light source unit is integrated into the backlight module, then the light emitting efficiency is improved, but the ease of repair deteriorates
Solution Approach 1:
The backlight module is divided into separate components: the light guide plate assembly and the light source unit. The light source unit can be detached from the light guide plate, allowing independent replacement of the light source without removing the entire backlight module. This segmentation resolves the contradiction by maintaining integrated light path efficiency while enabling easy repair through modular separation.
2Ease of repair
If the light source unit is detachable, then the ease of repair is improved, but the light coupling efficiency deteriorates
Solution Approach 1:
The light source unit is pre-designed with a detachable structure that includes alignment features and positioning mechanisms. These preliminary design elements ensure that when the light source unit is reattached, it automatically aligns with the light guide plate to maintain optimal light coupling efficiency, thus resolving the contradiction between ease of repair and light coupling efficiency.
3Device complexity
If the light guide plate is positioned close to the back bezel, then the device complexity is reduced, but the ease of repair deteriorates
Solution Approach 1:
The backlight module is segmented into the light guide plate assembly and the light source unit, with the light source unit positioned at a distance from the back bezel. This segmentation allows the light guide plate to remain close to the back bezel for compact design while the detachable light source unit provides easy repair capability, resolving the contradiction between device complexity and ease of repair.
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
Enables convenient and time-saving replacement of the light source unit, enhances light coupling efficiency by maintaining optimal spacing between light sources and the light guide plate, and improves display quality by ensuring proper alignment and support of light sources.
Implementation Method 1
The light guide plate 120 receives the light rays 135 from the light incident surface 122 and converts the light rays 135 into a plane light source
Implementation Method 2
The reflective sheet 150 is for reflecting the light rays 135 to emit toward the light emitting surface 124 of the light guide plate 120
Data Source
AI summary
A liquid crystal display (LCD) includes a back bezel, a light guide plate (LGP) having a light incident surface opposite to a first side wall of the back bezel, an LCD panel disposed above the LGP, a frame and a light source unit. There is an accommodation space between the first side wall of the back bezel and the light incident surface of the LGP. The frame is assembled with the back bezel to fix and surround the LGP and the LCD panel. A portion of the frame extends across the upper side of the accommodation space. A portion of the second side wall of the frame is opposite to the entrance side of the accommodation space and has a first securing portion. The light source unit has a second securing portion. When the light source unit is mounted/attached into the accommodation space, the second securing portion is jointed the first securing portion to secure the light source unit.