Curved Backlight Module Back Frame Design

Solution Overview

Problem

The existing methods for manufacturing curved liquid crystal display devices are complex and costly due to the need for a steel frame to force the back frame into a curved shape, leading to increased manufacturing costs and structural complications.

Innovation Solution

A backlight module with a back frame featuring stepped surfaces matching the curvature of the device, which supports the light-guiding plate and light source units, eliminating the need for a steel frame to bend the back frame, and comprising a light-guiding plate with curved surfaces, a back frame with parallel steps, and light source units disposed on side walls to face the respective side surfaces of the plate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If a steel frame is used to force the back frame into a curved shape, then the curved backlight module can be formed, but the structure becomes complicated and manufacturing cost increases

Engineering Contradiction:

Improvecurved shape of backlight moduleVSAvoidstructure of back frame

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The back frame is designed with a curved surface that directly forms the required curvature of the backlight module. The curved surface includes a first curved surface facing the light guiding plate and a second curved surface facing the liquid crystal display panel, eliminating the need for additional steel frame structures to force curvature.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The steel frame structure is completely removed from the design. The curvature-forming function previously performed by the steel frame is now integrated directly into the back frame through its curved surface design, simplifying the overall structure.

Inventive Principle:

Principle #2Taking out (Extraction)

2Shape

If a steel frame is used to force the back frame into a curved shape, then the curved backlight module can be formed, but manufacturing cost increases

Engineering Contradiction:

Improvecurved shape of backlight moduleVSAvoidmanufacturing cost

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The back frame is designed with a curved surface that directly forms the required curvature of the backlight module. The curved surface includes a first curved surface facing the light guiding plate and a second curved surface facing the liquid crystal display panel, eliminating the need for additional steel frame structures to force curvature.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The steel frame structure is completely removed from the design. The curvature-forming function previously performed by the steel frame is now integrated directly into the back frame through its curved surface design, simplifying the overall structure.

Inventive Principle:

Principle #2Taking out (Extraction)

3Shape

If the back frame is forced to bend using a steel frame, then the curved shape is achieved, but the back frame structure becomes more complex

Engineering Contradiction:

Improvecurved shape of back frameVSAvoidback frame structure

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The back frame is designed with a curved surface that directly forms the required curvature of the backlight module. The curved surface includes a first curved surface facing the light guiding plate and a second curved surface facing the liquid crystal display panel, eliminating the need for additional steel frame structures to force curvature.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The curvature-forming function and the structural support function are merged into a single back frame component. The back frame simultaneously provides structural support and defines the curved shape, eliminating the need for separate steel frame structures.

Inventive Principle:

Principle #5Merging (Combining)

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 back frame structure and reduces manufacturing costs by allowing monolithic production of the back frame and improving the display's lighting efficiency and viewing experience.

Implementation Method 1

a light-guiding plate, having an upper curved surface, a lower curved surface, a first side surface and a second side surface

Methodology Applied

Scientific EffectLight guidance: Waveguide (optics)

Data Source

PatentUS9389359B2Backlight module of curved liquid crystal display device and curved liquid crystal display device

Publication Date: 2016.07.12 TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD

AI summary

The present invention provides a backlight module of a curved liquid crystal display device, which includes a light-guiding plate, having an upper curved surface, a lower curved surface, a first side surface and a second side surface, wherein the upper curved surface and the lower curved surface being connected to the first side surface and the second side surface at both ends respectively; a first light source unit, fixedly disposed near the first side surface, a back frame, having a back plate comprising a plurality of steps, wherein the step surface of the steps contacting to support the lower curved surface. The present invention simplifies the back frame structure and reduces manufacturing cost. The present invention also discloses a curved liquid crystal display device with the above backlight module.