Display Substrate Grounding Structure for Thermal Lift Stability
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Solution Overview
Problem
Existing display devices face issues with substrate grounding instability due to lifting under high temperature conditions, leading to potential detachment from the frame.
Innovation Solution
A display device structure that includes a substrate coupled to a frame using fastening members and pads, where fastening members pass through the substrate and pads contact the substrate and frame, providing stable grounding even under thermal expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the substrate is mounted on the frame using conventional methods, then the substrate can be fixed to the frame, but the substrate may lift under high temperature conditions leading to grounding instability
Solution Approach 1:
The mounting structure is divided into separate functional elements: fastening members for mechanical attachment and pads for grounding contact. This segmentation allows each component to perform its specific function optimally - fastening members secure the substrate position while pads maintain continuous electrical contact with the frame, resolving the grounding instability caused by substrate lifting under thermal stress
Solution Approach 2:
Pads are introduced as intermediary elements between the substrate and frame. These pads serve as mediators that maintain electrical connectivity even when the substrate position changes due to thermal expansion. The pads compensate for position variations and ensure continuous grounding contact, solving the problem of grounding instability under high temperature conditions
2Strength
If fastening members are used to secure the substrate, then the substrate is mechanically fixed, but light unevenness may occur due to substrate deformation
Solution Approach 1:
The fastening members are strategically positioned at specific locations on the substrate rather than uniformly distributed. This localized fastening approach secures the substrate at critical points while allowing other areas to maintain their original flatness, preventing light unevenness while still providing adequate mechanical fixation strength
Data Source
AI summary
A display device is disclosed. The display device of the present disclosure may include: a display panel; a frame located behind the display panel; a substrate located between the display panel and the frame and coupled to the frame; a light source mounted to the substrate and providing light to the display panel; a fastening member passing through the substrate, coupled to the frame, and pressing the substrate toward the frame; and a pad located between the substrate and the frame, contacting with the rear surface of the substrate and the front surface of the frame, and through which the fastening member passes.