LCD Coupling Member Sealed Interface Thickness Reduction
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Solution Overview
Problem
Conventional LCD devices face limitations in reducing thickness and bezel width due to the need for a gap between the optical sheet and the liquid crystal display panel to prevent mura, which increases device thickness and bezel width.
Innovation Solution
An LCD device design that incorporates a coupling member to seal the space between the liquid crystal display panel and the light guide plate, eliminating the need for a separate guide panel and reducing the bezel width by ensuring a sealed interface between the optical sheet and the liquid crystal display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gap is provided between the liquid crystal display panel and the optical sheet to prevent mura, then image quality is improved, but device thickness increases
Solution Approach 1:
The guide panel, which traditionally maintained the gap between the liquid crystal display panel and optical sheet, is removed. The gap function is extracted and achieved through alternative means (coupling member with precise positioning), eliminating the need for the separate guide panel structure that increased thickness.
Solution Approach 2:
The coupling member uses elastic deformation of its arm portion to achieve precise positioning. By changing the physical state from rigid to elastic, the coupling member can flexibly adjust to maintain the optimal gap distance while accommodating manufacturing tolerances and thermal expansion, thereby preventing mura without requiring excessive thickness.
2Reliability
If a guide panel is used to maintain gap between optical sheet and liquid crystal display panel, then mura prevention is improved, but bezel width increases
Solution Approach 1:
The guide panel is completely removed from the structure. Its gap-maintaining function is extracted and transferred to the coupling member, which integrates positioning and coupling functions in a single component, thereby reducing bezel width while maintaining mura prevention capability.
Solution Approach 2:
The coupling member merges multiple functions: it couples the liquid crystal display panel to the light guide plate, maintains the precise gap distance, and provides elastic compensation for dimensional changes. This consolidation eliminates the need for separate guide panel structures that increased bezel width.
3Stability of the object's composition
If rigid coupling is used between liquid crystal display panel and light guide plate, then structural stability is improved, but mura occurs due to interference from bending and twisting
Solution Approach 1:
The coupling member transitions from rigid to elastic coupling. The arm portion's elastic deformation capability allows the structure to dynamically adapt to thermal expansion and manufacturing tolerances, preventing the bending and twisting that cause mura while maintaining adequate structural stability for assembly.
Solution Approach 2:
By changing the coupling rigidity parameter, the system allows controlled elastic deformation in the arm portion. This parameter change enables the structure to accommodate dimensional variations without transmitting harmful stresses to the optical sheet and liquid crystal display panel interface, thereby preventing mura.
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 sealed interface prevents mura formation, reduces device thickness, and narrows the bezel width, enhancing mechanical reliability and preventing moisture and foreign material intrusion, while maintaining image quality.
Implementation Method 1
a coupling member configured to couple the liquid crystal display panel to the light guide plate with the optical sheet therebetween such that a sealed space is provided between the liquid crystal display panel and the light guide plate
Implementation Method 2
a plurality of optical sheets 27 that are disposed on the light guide panel 25, and enhance a luminance characteristic of light traveling from the light guide plate 25 to the liquid crystal display panel 10
Implementation Method 3
a light guide plate 25 that is disposed on the reflective sheet 21, and guides light, which is incident from the light source module 23 onto a light input part, toward the liquid crystal display panel 10
Implementation Method 4
a reflective sheet 21 that is disposed at the lower caser 30; a light source module 23 that is disposed at one side of the lower case 30, and emits light
Data Source
AI summary
Disclosed is an LCD device with reduced thickness and bezel width. The LCD device includes a liquid crystal display panel configured to include an upper substrate and a lower substrate that are facing-coupled to each other, a backlight unit configured to include a light guide plate which irradiates light incident from a light source module on the liquid crystal display panel and an optical sheet disposed on the light guide plate, and a coupling member configured to couple the liquid crystal display panel to the light guide plate with the optical sheet therebetween such that a sealed space is provided between the liquid crystal display panel and the light guide plate.