Backlight Module Frameless Design with Slot and Light Bar
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Solution Overview
Problem
Existing backlight modules for LCD panels have an outer frame border that limits their application in narrow frame and frameless technologies, such as tablet PCs and mobile communication products, where a smaller volume and reduced light transmissive area are required.
Innovation Solution
A backlight module design that eliminates the outer frame border by incorporating a light guide plate with a strip-shaped slot and a light bar with mounting bases, which are accommodated within the slot, allowing for a frameless configuration and reduced volume, and uses a transparent double-sided adhesive to attach the LCD screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a frame structure is used to surround the light guide plate, then structural support and light absorption are improved, but the volume and light transmissive area are reduced
Solution Approach 1:
The patent removes the frame structure that traditionally surrounds the light guide plate. The light guide plate is directly mounted on the back plate without a frame, eliminating the outer frame border and reducing overall module volume while maintaining structural support through alternative means.
Solution Approach 2:
The patent merges the light guide plate mounting structure with the back plate structure. The light guide plate is directly attached to the back plate, combining what were previously separate components (frame and back plate) into a more integrated assembly that reduces volume.
2Strength
If a frame structure is used to surround the light guide plate, then structural support is improved, but the light transmissive area is reduced
Solution Approach 1:
The frame structure that creates the outer frame border and reduces light transmissive area is completely removed. The light guide plate extends to the edges of the back plate, maximizing the light transmissive area without compromising structural integrity.
3Ease of manufacture
If a black double-sided adhesive is used to attach the LCD screen, then light absorption and frame border formation are improved, but the light transmissive area is reduced
Solution Approach 1:
The patent changes the color/opacity of the double-sided adhesive from black (light-absorbing) to transparent (light-transmissive). This allows the adhesive to perform its attachment function while no longer absorbing light and forming an inner frame border, thereby maximizing the light transmissive area.
4Ease of manufacture
If mounting bases are provided outside the light guide plate, then lighting element installation is simplified, but the outer frame border is maintained
Solution Approach 1:
The mounting bases are positioned within the area occupied by the light guide plate rather than outside it. The lighting elements are mounted on the light guide plate itself, nesting the mounting function within the existing light guide plate boundaries, thereby eliminating the outer frame border and reducing volume.
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 results in a smaller, frameless backlight module with improved light distribution and reduced manufacturing costs, suitable for narrow frame and frameless technologies, while maintaining structural integrity and enhancing light transmission.
Implementation Method 1
Light emitted from the lighting elements enter the light guide plate 2 from one side of the light guide plate 2. The light exits from an emergent surface of the light guide plate 2 after being reflected one or more times inside the light guide plate 2.
Implementation Method 2
The black double-sided adhesive 6 will absorb light and present a frame shape, so that an inner frame border of the backlight module with a decreased light transmissive area is formed.
Implementation Method 3
uses a transparent double-sided adhesive to attach the LCD screen
Data Source
AI summary
The invention discloses a backlight module, comprising: a light guide plate provided with a strip-shaped slot, a light bar, which comprises a base plate and a plurality of mounting bases mounted on the base plate, each mounting base is provided with a lighting element respectively, wherein the base plate of the light bar is configured to engage with the first surface of the light guide plate, such that all the mounting bases can be accommodated within the strip-shaped slot. It is unnecessary for the backlight module to set up rubber frame and back plate, hence, the backlight module without outer frame border is formed.