Light Guide Plate Holder With Elastic Teeth
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Solution Overview
Problem
The light guide plate in edge-type backlight units for display apparatuses is prone to thermal expansion due to temperature rises, which can lead to abnormal deformation and reduced reliability of the display apparatus.
Innovation Solution
A holder system is designed to support the light guide plate, featuring a configuration with teeth and grooves that allow the holder to elastically deform, accommodating thermal expansion of the light guide plate while maintaining stable support under normal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light guide plate is made of PMMA material to ensure excellent light transmittance, then the light transmittance is improved, but the thermal stability deteriorates causing thermal expansion under high temperature conditions
Solution Approach 1:
The holder is designed with elastic deformation capability that changes its physical state based on temperature conditions. At normal temperatures, the holder maintains a rigid fixed state for stable support, while at high temperatures it transitions to an elastic state that accommodates thermal expansion of the PMMA light guide plate, thus resolving the thermal stability issue while preserving light transmittance properties
Solution Approach 2:
The holder transitions from a static fixed structure to a dynamic structure that can adapt its support characteristics. The elastic connectors enable the holder to dynamically adjust between a fixed state (at normal temperature) and a deformable state (at high temperature), allowing the system to maintain reliability across different thermal conditions while keeping the PMMA material for optimal light transmittance
2Stability of the object's composition
If the holder firmly supports the light guide plate under normal conditions, then the support stability is improved, but the adaptability to thermal expansion deteriorates
Solution Approach 1:
The holder employs elastic connectors that enable dynamic transition between two operational states: a fixed state at normal temperatures providing stable support, and an elastic deformable state at high temperatures that accommodates thermal expansion. This dynamic behavior allows the holder to maintain both support stability and thermal adaptability
Solution Approach 2:
The physical parameters of the holder (specifically its rigidity and deformation capability) change based on temperature conditions. The elastic connectors allow the holder structure to transition from a rigid configuration that provides stable support to a more compliant configuration that can deform elastically to accommodate thermal expansion of the light guide plate
3Ease of manufacture
If the holder structure is made simple for ease of manufacture, then the manufacturing complexity is reduced, but the capability to elastically deform accommodates thermal expansion
Solution Approach 1:
The holder is segmented into distinct functional components: a holder body and separate elastic connectors. This segmentation allows the elastic connectors to be designed specifically for deformation capability while keeping the overall structure relatively simple. The elastic connectors can be integrated into the holder body through injection molding, maintaining manufacturing simplicity while providing the necessary elastic deformation capability to accommodate thermal expansion and improve reliability
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 holder system effectively prevents abnormal deformation of the light guide plate during thermal expansion, ensuring stable operation and improved reliability of the display apparatus.
Implementation Method 1
the holder is configured to elastically deform between the first state and the second state
Data Source
AI summary
A display apparatus includes a liquid crystal panel; a light guide plate behind the liquid crystal panel; a light source adjacent to a thickness surface of the light guide plate and configured to emit light toward the thickness surface of the light guide plate; a rear chassis behind the light guide plate; and a holder coupled to the rear chassis and supporting the light guide plate, wherein the holder includes: a first tooth; a first tooth groove next to the first tooth; a second tooth facing the first tooth; and a second tooth groove next to the second tooth, wherein in a first state, the first tooth is disposed outside the second tooth groove and the second tooth is disposed outside the first tooth groove, and in a second state, the first tooth is inserted into the second tooth groove and the second tooth is inserted into the first tooth groove, and wherein the holder is configured to elastically deform between the first state and the second state.