Back Fixing Frame for LCD Chassis Attachment Force Isolation
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Solution Overview
Problem
Conventional liquid crystal display devices suffer from deterioration in display quality due to external forces generated during attachment to customer's chassis, leading to deformation of the liquid crystal panel and reflection sheet, which affects luminance uniformity and overall display performance.
Innovation Solution
A liquid crystal display device configuration that includes a front frame, liquid crystal panel, and backlight unit, with a back fixing member attached to the front frame and covering the back and side faces, featuring an attachment portion on the back fixing member for external chassis attachment, which reduces the transmission of external forces to the panel and reflection sheet, enhancing rigidity and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If attachment portion is provided in backlight chassis or rear frame, then liquid crystal display device can be attached to customer's chassis, but external force deforms liquid crystal panel and deteriorates display quality
Solution Approach 1:
The patent introduces a back fixing frame as an intermediary component between the attachment portion and the liquid crystal panel. This back fixing frame serves as a mediator that absorbs and distributes external forces, preventing direct transmission to the liquid crystal panel and reflection sheet, thereby maintaining display quality while enabling attachment functionality
Solution Approach 2:
The patent segments the structural framework into distinct components: front frame, back fixing frame, and backlight unit. By separating the attachment function (located in the back fixing frame) from the display function (liquid crystal panel), the design allows independent optimization of each component's role, preventing force transmission from attachment to display elements
2Ease of operation
If attachment portion is provided in side face, then device can be attached to customer's chassis, but deformation occurs in backlight chassis and rear frame transmitted to liquid crystal panel
Solution Approach 1:
The back fixing frame acts as a protective intermediary that decouples the attachment mechanism from the liquid crystal panel. External forces applied during attachment are absorbed and distributed across the back fixing frame structure, preventing deformation transmission to the liquid crystal panel and maintaining its flatness
Solution Approach 2:
The patent applies local quality by concentrating the attachment portion specifically in the back fixing frame rather than distributing it across multiple components. This localized placement ensures that attachment forces are managed at a specific structural location, protecting other components including the liquid crystal panel from deformation
3Ease of operation
If attachment portion is provided in back face, then device can be attached to customer's chassis, but deformation in rear frame affects flatness of reflection sheet and luminance uniformity
Solution Approach 1:
The back fixing frame serves as a protective intermediary between the attachment portion and the reflection sheet. It absorbs and distributes external forces, preventing deformation transmission to the reflection sheet and maintaining its flatness, which is critical for achieving uniform luminance across the display
Solution Approach 2:
By segmenting the structure into front frame, back fixing frame, and backlight unit, the patent isolates the attachment function from the optical components. The back fixing frame handles mechanical attachment forces while the reflection sheet maintains its optical function without deformation, preserving luminance uniformity
Data Source
AI summary
A liquid crystal display device is provided, capable of minimizing deterioration in display quality of a liquid crystal panel due to external force generated by connection with an external chassis such as a customer's chassis. The liquid crystal display device has, at least, a front frame, a liquid crystal panel, and a backlight unit having at least a rear frame, arranged in this order. A back fixing frame to be fixed to the front frame is provided on the back face of the liquid crystal display device, and attachment portions to be attached to an external chassis are provided in the back fixing frame. This makes it difficult for external force generated by connection with the external chassis to be transmitted to the liquid crystal panel or the backlight unit, suppresses deformation of the liquid crystal panel or reflection sheet and prevents deterioration in display quality.