Light Guide Plate Protrusion Relocation for LCD Light Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LCD devices experience light leakage at the periphery of protrusions on the light guide plate due to improper assembly, especially as the devices become thinner and smaller, leading to reduced optical efficiency.
Innovation Solution
The design incorporates protrusions on the light guide plate that correspond to locking grooves on the main support, maximizing the distance between the image display region and the protrusions to prevent light leakage, with the light guide plate being securely fixed using these features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the LCD device is made thinner and smaller, then the compactness is improved, but light leakage occurs at the periphery of protrusions on the light guide plate
Solution Approach 1:
The patent extracts the problematic protrusions from the light guide plate by providing separate protrusions on the main support that engage with the light guide plate edges, rather than having protrusions directly on the light guide plate itself. This separation eliminates the light leakage source while maintaining the thin profile.
Solution Approach 2:
The patent introduces the main support as an intermediary component between the light guide plate and the housing. The main support carries the protrusions and provides a stable mounting structure, allowing the light guide plate to be positioned without having its own protrusions that would cause light leakage.
2Stability of the object's composition
If protrusions are formed on the light guide plate for assembly, then the assembly stability is improved, but light leakage occurs at the periphery of these protrusions
Solution Approach 1:
The assembly protrusions are extracted from the light guide plate and relocated to the main support. The light guide plate maintains its smooth edges for optimal light transmission, while the main support provides the necessary protrusions for stable assembly and positioning.
Solution Approach 2:
The patent segments the assembly function from the light guide plate by providing separate mounting features on the main support. This allows the light guide plate to focus solely on light transmission without compromising its optical properties due to protrusion-related light leakage.
3Volume of moving object
If the distance between image display region and protrusions is reduced, then the device compactness is improved, but optical efficiency decreases due to light leakage
Solution Approach 1:
By removing protrusions from the light guide plate and relocating them to the main support, the patent eliminates the primary source of light leakage. This allows the device to achieve compact dimensions without sacrificing optical efficiency, as the light guide plate edges remain smooth and continuous.
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 configuration effectively prevents light leakage by ensuring proper assembly and alignment of the light guide plate, enhancing optical efficiency and maintaining the slim and compact form factor of the LCD device.
Implementation Method 1
a reflection sheet for reflecting light emitted from a rear surface of the light guide plate to the light guide plate
Implementation Method 2
a light guide plate having protrusions at one or more corners thereof... for transmitting light emitted from a lamp to the LC panel 6
Data Source
AI summary
Disclosed is a liquid crystal display (LCD) device capable of minimizing the occurrence of light leakage at peripheral regions of protrusions by maximizing a distance between an image display region and the protrusions, by forming the protrusions at one or more corners of the light guide plate. The LCD device comprises: a light guide plate having protrusions at one or more corners thereof; a main support having fixing grooves formed at one or more corners thereof corresponding to the corners of the light guide plate, the locking grooves for coupling the protrusions of the light guide plate; an LC panel for displaying an image by using light emitted from the light guide plate; an optical source having one or more light emitting diodes (LEDs) for irradiating light to the light guide plate; a reflection sheet for reflecting light emitted from a rear surface of the light guide plate to the light guide plate; and one or more optical sheets disposed between the light guide plate and the LC panel.