Display Device Backlight Coupling Structure Alignment

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Solution Overview

Problem

The existing display devices, such as LCDs, face complexities in assembly due to multiple fastening means, leading to misalignment and luminance degradation, which affects marketability and image quality.

Innovation Solution

A simplified coupling structure for the display panel and backlight unit, utilizing a light guide plate, reflector, back cover, and integrated light-emitting diode array with a printed circuit board, which reduces assembly procedures and costs, and minimizes misalignment by accurate alignment of components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If multiple fastening means are used to couple the display panel and backlight unit, then the structural stability is improved, but the assembly complexity increases

Engineering Contradiction:
Improvestructural stabilityVSAvoidassembly complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent merges multiple fastening means into a single integrated coupling structure. The backlight unit is directly coupled to the display panel through an integrated interface that combines positioning and fastening functions, eliminating the need for separate fastening devices and simplifying the assembly process while maintaining structural stability.

Inventive Principle:
Principle #5Merging (Combining)

2Stability of the object's composition

If multiple fastening means are used to couple the display panel and backlight unit, then the structural stability is improved, but the assembly cost increases

Engineering Contradiction:
Improvestructural stabilityVSAvoidassembly cost
Core Design Contradiction:
Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent merges multiple fastening means into a single integrated coupling structure. The backlight unit is directly coupled to the display panel through an integrated interface that combines positioning and fastening functions, eliminating the need for separate fastening devices and simplifying the assembly process while maintaining structural stability.

Inventive Principle:
Principle #5Merging (Combining)

3Stability of the object's composition

If multiple fastening means are used to couple the display panel and backlight unit, then the structural stability is improved, but the misalignment occurs

Engineering Contradiction:
Improvestructural stabilityVSAvoidalignment precision
Core Design Contradiction:
Stability of the object's compositionVSManufacturing precision

Solution Approach 1:

The patent incorporates positioning structures that perform preliminary alignment before final coupling. The integrated coupling structure includes positioning elements that ensure accurate alignment of the backlight unit with the display panel, preventing misalignment caused by accumulated allowances from multiple fastening steps.

Inventive Principle:
Principle #10Preliminary action

4Stability of the object's composition

If multiple fastening means are used to couple the display panel and backlight unit, then the structural stability is improved, but the luminance degradation occurs

Engineering Contradiction:
Improvestructural stabilityVSAvoidluminance
Core Design Contradiction:
Stability of the object's compositionVSIllumination intensity

Solution Approach 1:

The patent incorporates positioning structures that perform preliminary alignment before final coupling. The integrated coupling structure includes positioning elements that ensure accurate alignment of the backlight unit with the display panel, preventing misalignment caused by accumulated allowances from multiple fastening steps.

Inventive Principle:
Principle #10Preliminary action

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 solution simplifies the assembly process, reduces luminance degradation, and enhances image quality by ensuring precise alignment and reduced accumulative allowances, thereby improving consumer satisfaction and marketability.

Implementation Method 1

a light guide plate on a rear surface of the display panel, the light guide plate being configured to direct light toward the display panel

Methodology Applied
Scientific EffectLight transmission: Light

Implementation Method 2

a reflector on a rear surface of the light guide plate, the reflector being configured to reflect light from a rear of the light guide plate toward a front surface of the light guide plate

Methodology Applied
Scientific EffectTotal internal reflection: Total Internal Reflection

Implementation Method 3

a light-emitting diode array coupled to an edge of the back cover, the light-emitting diode array including: a printed circuit board, and a plurality of light-emitting diodes at a side surface of an edge of the light guide plate, the plurality of light-emitting diodes being configured to generate light

Methodology Applied
Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS10451920B2Display device and method of manufacturing the same
Publication Date: 2019.10.22 LG DISPLAY CO LTD
  • US10451920B2 patent drawing
  • US10451920B2 patent drawing
  • US10451920B2 patent drawing

AI summary

A display device and a method of manufacturing the same are provided. A display device includes: a light guide plate on a rear surface of a display panel, the light guide plate being configured to direct light toward the display panel, a reflector on a rear surface of the light guide plate, the reflector being configured to reflect light from a rear of the light guide plate toward a front surface of the light guide plate, a back cover on a rear surface of the reflector, and a light-emitting diode array coupled to an edge of the back cover, the light-emitting diode array including: a printed circuit board, and a plurality of light-emitting diodes at a side surface of an edge of the light guide plate, the plurality of light-emitting diodes being configured to generate light, the plurality of light emitting diodes being attached to the printed circuit board.