Backlight Unit Sheet Fixation for Narrow Bezel Design
Solution Overview
Problem
Existing backlight units face challenges in achieving a narrow bezel design due to difficulties in securely fastening optical sheets, leading to light leakage and potential damage during mechanical testing and transportation, while also requiring longer assembly times.
Innovation Solution
A backlight unit design that incorporates a sheet fixating mechanism with a fixating pin and sheet mounting member, which securely attaches the optical sheet to the main support using a pin and foam pad, preventing light leakage and ensuring stability even in narrow bezel configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a narrow bezel design is implemented, then the display area is increased and the device is more compact, but the optical sheet cannot be securely fastened leading to light leakage and potential damage
Solution Approach 1:
The support structure is divided into a main support and a separate sheet mounting member that can be inserted into the main support. This segmentation allows the sheet mounting member to extend beyond the main support edges, providing secure attachment points for the optical sheet even in narrow bezel configurations where the main support alone would be insufficient.
Solution Approach 2:
The sheet mounting member acts as an intermediary component between the main support and the optical sheet. It provides the necessary extension and attachment structure that secures the optical sheet to the backlight unit, preventing light leakage and damage while enabling narrow bezel design.
2Reliability
If traditional sheet fastening methods are used, then the optical sheet can be secured, but the assembly process is time-consuming and complex
Solution Approach 1:
The sheet mounting member combines multiple functions into a single component: it extends beyond the main support edges to provide attachment points, structurally supports the optical sheet, and integrates with the main support through insertion. This merging of functions reduces the number of separate components and simplifies the assembly process, reducing assembly time while maintaining reliable sheet fixation.
3Reliability
If the support structure is extended to secure the sheet, then the sheet fixation is improved, but the device size increases and narrow bezel design is compromised
Solution Approach 1:
The support structure is divided into a main support and a separate sheet mounting member. The sheet mounting member is designed to extend beyond the main support edges only where necessary for sheet attachment, while the main support maintains its compact size for narrow bezel design. This segmentation allows localized extension without increasing overall device size.
Solution Approach 2:
The sheet mounting member is designed to be inserted into and nested within the main support structure. This nesting arrangement allows the sheet mounting member to provide extended support functionality while remaining compact and integrated within the overall backlight unit, preventing increase in device size.
Data Source
AI summary
Provided are a backlight unit and a display device using the same. The backlight unit includes a main support, in which a sheet ear part of an optical sheet is disposed, having a sheet mounting part and an upper hole, a sheet mounting member for mounting the sheet ear part of the optical sheet and formed with a lower hole, and a sheet fixating mechanism coupled to the main support, the optical sheet, and the sheet mounting member to fix the sheet ear part of the optical sheet to the main support. A narrow bezel may be implemented, an optical sheet may be stably secured even in the narrow bezel, and light leakage may be prevented.