Light-Blocking Tape for LCD Light Leakage
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Solution Overview
Problem
Liquid crystal display (LCD) modules experience light leakage due to protrusions on the light guide plate, leading to decreased brightness and color uniformity.
Innovation Solution
A light-blocking tape is introduced between the support main and the liquid crystal panel, featuring second protrusions that correspond to the first protrusions on the light guide plate, effectively preventing light leakage by covering the peripheries and ensuring uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If protrusions are added to the light guide plate for fixing, then the light guide plate is securely fixed to the support main, but light leakage occurs through the protrusions
Solution Approach 1:
A light-blocking tape is introduced as an intermediary material between the light guide plate protrusions and the support main. This tape blocks the transmission of light through the protrusions while maintaining the mechanical fixing function, thus resolving the contradiction between secure fixation and light leakage prevention
Solution Approach 2:
The light-blocking tape is selectively applied only at the protrusion regions of the light guide plate where light leakage occurs. This localized application blocks light at the specific problem areas without affecting the overall optical quality or requiring modification of the entire structure
2Object-generated harmful factors
If the support main structure is modified to prevent light leakage, then light leakage is reduced, but the device complexity increases
Solution Approach 1:
The light-blocking tape is a simple, inexpensive, and easily replaceable component compared to modifying the support main structure. It provides an economical solution that avoids complex structural changes while effectively preventing light leakage
Solution Approach 2:
Rather than modifying the existing support main or light guide plate structures, a simple intermediary tape is added to bridge the gap and block light leakage, maintaining structural simplicity while solving the light leakage problem
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 light-blocking tape significantly reduces light leakage, enhancing the brightness and color uniformity of the LCD device by blocking stray light and maintaining a uniform light source.
Implementation Method 1
a light-blocking tape between the projected part and the liquid crystal panel, the light-blocking tape including at least one second protrusion corresponding to the at least one first protrusion
Data Source
AI summary
A liquid crystal display module includes a cover bottom, a reflection sheet over the cover bottom, a light guide plate over the reflection sheet and including at least one first protrusion, a lamp at a side of the light guide plate, optical sheets over the light guide plate, a support main surrounding the light guide plate and the optical sheets and including a projected part at an inner surface thereof, a liquid crystal panel disposed supported by the projected part of the support main, a light-blocking tape between the projected part and the liquid crystal panel, the light-blocking tape including at least one second protrusion corresponding to the at least one first protrusion, and a top cover covering edges of a front surface of the liquid crystal panel and combined with the support main and the cover bottom.