Display Module Housing Thermal Expansion Management
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Solution Overview
Problem
Existing display devices face issues with image distortion, sag, and wrinkles due to the fixation of sheet-shaped optical members using adhesives or rubber cushions, which deteriorate the display quality.
Innovation Solution
A display module design featuring a housing structure with multiple interconnected components (first, second, and third housings) that supports the display panel and optical member, using double-sided tape for fixation and allowing for variable spacing to absorb thermal expansion, thereby reducing pressure on the optical member and preventing distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the sheet-shaped optical member is fixed to the housing with an adhesive or sandwiched between members including a rubber cushion, then the optical member is securely held in place, but distortion, sag, wrinkles, or other failures occur that deteriorate image quality
Solution Approach 1:
The housing is divided into multiple segments (first housing, second housing, third housing) that can move independently relative to each other, allowing each segment to accommodate thermal expansion separately while maintaining overall structural support for the optical member
Solution Approach 2:
The housing structure incorporates dynamic elements that allow for thermal expansion and contraction, transforming the static fixation problem into a dynamic system that adapts to temperature changes, preventing distortion and wrinkles in the optical member
2Strength
If the housing structure is made rigid to provide stable support, then structural strength is improved, but thermal expansion causes pressure on the optical member leading to distortion
Solution Approach 1:
Different parts of the housing have different properties: some parts maintain rigid structural support while others incorporate flexibility to accommodate thermal expansion, allowing each region to perform its specific function optimally
Solution Approach 2:
The housing structure allows for changes in physical parameters (spacing, position) in response to thermal expansion, maintaining structural strength while adapting to temperature variations to prevent optical member distortion
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 solution effectively suppresses wrinkles and distortion in the optical member, ensuring stable image display across varying temperatures and reducing the risk of uneven display, while also simplifying the device configuration and reducing component count.
Implementation Method 1
allowing for variable spacing to absorb thermal expansion
Data Source
AI summary
According to an aspect, a display module includes a display panel that displays an image on a display surface; an optical member; and a housing that supports the display panel and the optical member. The housing includes a first housing, a second housing, and a third housing that is arranged on a side of the second housing opposite to the first housing side. An end of the first housing on a display surface side of the display panel protrudes toward the center of the display surface to face an outer edge of the display surface. An end of the second housing on a side opposite to the display surface side of the display panel protrudes toward the center of the display surface to face an outer edge of a surface opposite to the display surface. The optical member is provided between the second housing and the third housing.