Light Source Unit Optical Sheet Wrinkle Prevention
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Solution Overview
Problem
In thin type display apparatuses, the optical sheet can be wrinkled by heat from the light source, leading to decreased display quality, and when separated from the light guide plate, it may move and cause damage or display defects like white lines or dots.
Innovation Solution
A light source unit with a support part and a holding section, such as an adhesive member or convex/concave structures, to securely position the optical sheet, preventing movement and wrinkles, even when separated from the light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the optical sheet is directly placed on the front of the light guide plate, then the optical sheet can be easily positioned, but the optical sheet may be wrinkled by heat from the light source, decreasing display quality
Solution Approach 1:
A support part is introduced as an intermediary component between the light guide plate and the optical sheet. This support part provides a dedicated structure to hold the optical sheet at a specific position, preventing direct contact with the heat-generating light source while ensuring proper positioning during assembly and operation.
2Reliability
If the optical sheet is separated from the light guide plate by a support part, then the optical sheet is protected from heat, but the optical sheet may move in longitudinal and lateral directions during assembly or transportation, causing damage or display defects
Solution Approach 1:
The support part is designed with pre-formed holding sections that are ready to secure the optical sheet before assembly or transportation occurs. This preliminary positioning structure ensures the optical sheet is firmly held in place from the outset, preventing any movement during subsequent handling or assembly processes.
Solution Approach 2:
The support part acts as an intermediary structure that not only protects the optical sheet from heat but also provides integrated holding sections to stabilize the optical sheet's position, simultaneously addressing both protection and positioning stability requirements.
3Reliability
If the optical sheet is separated from the light guide plate, then heat-induced wrinkles are prevented, but the light guide plate may be damaged and white lines or dots may appear on the display screen
Solution Approach 1:
The support part serves as a protective intermediary between the light guide plate and the external environment during assembly and transportation. This support structure prevents direct contact that could cause damage to the light guide plate while maintaining the separation needed to prevent heat-induced wrinkles, and also prevents white lines or dots from appearing on the display screen by ensuring stable positioning.
Data Source
AI summary
An example light source unit, comprising: a light emitting plate that emits light toward a front; an optical sheet that is separated from and faces a front surface of the light emitting plate; a support part that supports an edge portion of the optical sheet; and a holding section that faces an edge portion of a front or a back side of the optical sheet and holds the optical sheet.