Light Guide Plate Positioning and Warping Prevention
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Solution Overview
Problem
Conventional backlight modules in LCD displays face issues with excessive shifting between frames and light guide plates, leading to display quality deterioration, and potential warping due to volume expansion from temperature or humidity changes.
Innovation Solution
A light source module design incorporating a first and second frame, a light guide plate, a light source, positioning elements, and buffer elements, where the positioning elements secure the light guide plate and buffer elements absorb volume expansion to prevent warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the space remained between the frame and the light guide plate is too large, then assembly tolerance is improved, but excessive shift between frame and light guide plate deteriorates display quality
Solution Approach 1:
A buffer element is introduced as an intermediary component between the frame and the light guide plate. This buffer element fills the gap to prevent excessive shifting while maintaining appropriate assembly tolerance, thereby resolving the contradiction between ease of manufacture and manufacturing precision.
2Manufacturing precision
If the space remained between the frame and the light guide plate is too small, then display quality is improved, but volume expansion of light guide plate causes warping
Solution Approach 1:
The buffer element serves as a mediator that accommodates volume expansion of the light guide plate caused by temperature or humidity changes. By providing a compliant interface, it prevents warping while maintaining close positioning for high display quality.
Solution Approach 2:
The buffer element's material properties are selected to match thermal expansion characteristics, allowing it to absorb volume changes from the light guide plate through parameter changes in material selection, thereby preventing warping while maintaining precision.
3Manufacturing precision
If positioning elements are added to secure light guide plate, then shifting is prevented, but device complexity increases
Solution Approach 1:
The positioning function is merged with the buffer element, which simultaneously provides positioning and gap filling functions. This integration reduces the number of separate components needed, thereby reducing device complexity while maintaining positioning precision.
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 design effectively prevents excessive shifting and warping of the light guide plate, enhancing display quality by maintaining the light guide plate's position and tolerating volume changes caused by environmental factors.
Implementation Method 1
the volume expansion of the light guide plate owing to temperature or/and humidity changing
Data Source
AI summary
A light source module includes a first frame, a second frame, a light guide plate, a light source, at least one positioning element and at least one buffer element. The second frame is disposed corresponding to the first frame and has at least one through hole. The light guide plate is disposed between the first frame and the second frame and has a light incident surface and a side surface, and the side surface faces to the through hole of the second frame. The light source is disposed on the light incident surface of the light guide plate. The positioning element is disposed in the through hole of the second frame. The buffer element is located between the positioning element and the side surface of the light guide plate.