Top-Cut Conical Backlight Supports for LCD Light Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal modules require extensive labor and increased manufacturing costs due to the need for multiple types of supports and cutout holes, which also lead to light leakage and the necessity of additional parts like shading sheets.
Innovation Solution
The module features a backlight chassis with top-cut conical supports formed through drawing, where positioning and fixing cylindrical portions with screw holes are used to securely attach circuit boards without the need for multiple support types or cutout holes, reducing labor and parts required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple types of supports (drawn and raised) are used to fix the circuit board, then the circuit board can be securely fixed, but the manufacturing process becomes complex and labor-intensive
Solution Approach 1:
The patent merges the functions of multiple support types (drawn supports and raised supports) into a single type of support structure. The support includes both a drawn portion for positioning and a raised portion for fixation, eliminating the need for separate support components and reducing manufacturing complexity while maintaining secure circuit board fixation.
Solution Approach 2:
The support structure is designed to perform multiple functions: it provides positioning through the drawn portion, fixation through the raised portion, and structural support. This multi-functional design replaces the need for multiple specialized support components, simplifying the overall structure while maintaining reliability.
2Ease of operation
If cutout holes are formed on the chassis body, then the circuit board can be positioned and fixed, but light leaks through these holes
Solution Approach 1:
The patent converts the harmful effect of light leakage through cutout holes into a beneficial design feature. Instead of simply closing the holes with shading sheets, the raised support structure utilizes the cutout hole space to provide fixation functionality, turning the light-leaking openings into useful fixation points that serve dual purposes.
3Object-generated harmful factors
If shading sheets are added to close cutout holes, then light leakage is prevented, but the number of parts increases and manufacturing cost increases
Solution Approach 1:
The patent merges the light shielding function and the circuit board fixation function into the support structure itself. The raised portion of the support acts as both a fixation element and a light shield, eliminating the need for separate shading sheets and reducing the total number of parts while preventing light leakage.
4Reliability
If multiple types of supports are formed through drawing and raising, then the circuit board can be firmly fixed, but the manufacturing time and labor increase
Solution Approach 1:
The patent combines the drawn support and raised support into a single integrated support structure formed through a unified manufacturing process. This merging reduces the number of separate forming operations needed, decreasing manufacturing time and labor while maintaining the fixation strength provided by both support types.
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 design simplifies the manufacturing process, reduces costs, and prevents light leakage by eliminating the need for shading sheets, while ensuring secure fixation of circuit boards with reduced labor and fewer parts.
Implementation Method 1
the support is formed in a top-cut conical shape by swelling the backlight chassis backward by being subjected to drawing
Data Source
AI summary
A liquid crystal module includes: a rectangular-frame-shaped mold frame that is provided with a backlight therein; a liquid crystal cell that is arranged on a front face of the mold frame and is illuminated from a rear side by the backlight; a backlight chassis that is made of metal and fixed on a rear face of the backlight via a reflecting sheet made of synthetic resin; a plurality of supports that are formed on the backlight chassis; and a circuit board that is fixed to the supports by screwing, wherein the support is formed in a top-cut conical shape by swelling the backlight chassis backward by being subjected to drawing.