Liquid Crystal Backlight Module with Segmented Light Guide Lamination
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Solution Overview
Problem
Conventional full lamination of light guide plates in liquid crystal screen backlight modules leads to issues such as loss of diffuse reflection and guiding of light, increased cost, low yield, and dust entry due to air-filled spaces, while frame lamination introduces thickness and dust issues.
Innovation Solution
A liquid crystal screen backlight module design featuring a light guide plate with concave mesh points, connected to a transparent light conducting member in frame lamination, with one end face connected to a touch panel in full lamination, using transparent optical resin adhesive to maintain light guiding and prevent adhesive filling in mesh points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full lamination is used to connect light guide plate and touch panel, then dust entry is prevented and structural strength is improved, but the mesh points on light guide plate are filled with adhesive causing loss of diffuse reflection and light guiding effect
Solution Approach 1:
The connection between light guide plate and touch panel is segmented into two parts: the periphery uses full lamination for dust prevention, while the central area with mesh points uses frame lamination to preserve light guiding function. This segmentation allows each region to be optimized for its specific function.
Solution Approach 2:
Different lamination methods are applied to different regions of the light guide plate-touch panel assembly. The peripheral region receives full lamination for sealing, while the central region maintains frame lamination to preserve the mesh points' optical properties.
2Illumination intensity
If frame lamination is used to connect light guide plate and touch panel, then light guiding effect is preserved, but air-filled spaces remain causing dust entry and increased thickness
Solution Approach 1:
The connection structure is segmented such that the periphery uses full lamination to eliminate air-filled spaces and prevent dust entry, while the central area uses frame lamination to preserve light guiding function. This resolves the contradiction by applying different connection methods to different functional zones.
3Strength
If full lamination is used for light guide plate, then structural strength is improved, but manufacturing complexity and cost increase due to low yield and complete replacement requirement
Solution Approach 1:
The lamination structure is segmented into full lamination at the periphery for strength and dust prevention, and frame lamination in the center for manufacturability and light guiding preservation. This hybrid approach balances structural requirements with manufacturing efficiency.
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
Prevents loss of diffuse reflection and guiding of light, reduces thickness, and minimizes dust entry, while maintaining effective lamination and reducing costs by using transparent thin films and vacuum processing for stable connection.
Implementation Method 1
a transparent light conducting member, where one end face of the transparent light conducting member is connected to the light guide plate in a frame lamination, and another end face of the transparent light conducting member is connected to the touch panel in the full lamination
Implementation Method 2
the light guide plate is connected to the light emitting assembly by a transparent adhesive layer, and the end surfaces of the transparent light conducting member are respectively connected to the light guide plate and the touch panel through the transparent adhesive layer
Data Source
AI summary
Disclosed in the present application is a liquid crystal screen backlight module. The liquid crystal screen backlight module comprises: a light emitting assembly; a light guide plate, one end face of the light guide plate being in full lamination with the light emitting assembly, and the other end face of the light guide plate being provided with a plurality of recessed dots; a touch panel, disposed on the end face of the light guide plate away from the light emitting assembly; and a transparent photoconductive member, one end face of the transparent photoconductive member being in frame lamination with the light guide plate, and the other end surface of the transparent photoconductive member being in full lamination with the touch panel.