Display Device Housing Opening Light Leakage Prevention
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Solution Overview
Problem
Conventional display devices suffer from light leakage through engagement openings between the housing and backlight, which degrades display quality and increases manufacturing costs due to the need for light shielding tapes.
Innovation Solution
The display device design includes a backlight with a light source substrate and a second housing that has openings in its side wall portion to overlap the light source substrate, and a first housing with projected portions that fit into these openings, effectively preventing light leakage by positioning the openings away from the back surface portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If openings are provided in the back surface housing for engagement portions, then the housing structure can be fixed, but light leaks through these openings and deteriorates display quality
Solution Approach 1:
The patent applies local quality by providing light-shielding treatment only at specific locations where light leakage occurs (the engagement openings), rather than treating the entire housing. The light-shielding member is selectively positioned at the openings formed in the back surface housing for engagement portions, preventing light leakage only where needed while maintaining the overall transparency or design of the housing.
Solution Approach 2:
The patent introduces a light-shielding member as an intermediary element between the light source and the external environment. This member is specifically positioned at the engagement openings to block light paths without interfering with the mechanical engagement function, thus mediating between the conflicting requirements of structural fixation and light prevention.
2Object-generated harmful factors
If tape is used to close gaps of openings for light shielding, then light leakage is prevented, but manufacturing processes increase and material cost increases
Solution Approach 1:
The patent merges the light-shielding function with the existing housing structure by integrating the light-shielding member into the back surface housing during the molding process. This eliminates the need for separate tape application steps, as the light-shielding function is combined with the structural component itself, reducing both manufacturing complexity and material costs.
Solution Approach 2:
The housing structure is designed to be self-sufficient for light shielding by incorporating the light-shielding member as an integral part of the housing. The housing itself provides the light-shielding capability through its design, eliminating the need for external light-shielding materials like tape, thus making the system self-service and reducing manufacturing complexity.
3Object-generated harmful factors
If openings are provided in the side wall portion to overlap the light source substrate, then light can be restrained from leaking, but the structural strength of the openings must be maintained
Solution Approach 1:
The patent applies local quality by providing reinforcement specifically at the openings in the side wall portion where structural strength is compromised. The reinforcing members are positioned only at these critical locations to maintain structural integrity without adding unnecessary material or complexity to the entire housing structure.
Solution Approach 2:
The patent uses composite materials or combined structures by integrating reinforcing members with the housing material at the opening locations. This creates a composite structure that maintains both the light-shielding function and the structural strength, combining the properties of different materials to achieve both objectives simultaneously.
Data Source
AI summary
A display device includes a first housing containing a display panel between a backlight and the first housing, the backlight includes a light source substrate, and a second housing that holds the light source substrate, the second housing includes a back surface portion and a first side wall portion protruded in a front surface direction of the backlight from the back surface portion, the light source substrate is fixed to an inside of the first side wall portion, an opening is provided in the first side wall portion so as to overlap the light source substrate, the first housing includes a front surface frame portion and a second side wall portion protruded in a back surface direction of the backlight from the front surface frame portion, a projected portion is provided in an inside of the second side wall portion, and the projected portion is fitted into the opening.