Display Backlight Coupling Hole Prevents Particle Dark Spots
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Solution Overview
Problem
The coupling process of the supporting element in display apparatuses can generate particles that block light, leading to image quality deterioration and the formation of dark spots, which can distract users and increase the risk of accidents, especially in vehicle installations where the display is visible to drivers.
Innovation Solution
A display apparatus design featuring a back-light unit with a first and second light-guide plate, a light-source element, and a viewing angle control unit, where the supporting element is in contact with the light-source circuit board and includes a metal or insulating material, minimizing particle generation during coupling and ensuring light path integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the supporting element is coupled with the cover bottom using an interference fitting method, then the supporting element is securely fastened, but particles are generated during the coupling process that block light and create dark spots
Solution Approach 1:
The patent introduces a coupling hole as an intermediary structure that allows the supporting element to pass through and be secured without direct interference fitting between the supporting element and cover bottom. This mediator structure prevents particle generation while maintaining secure coupling.
Solution Approach 2:
The patent extracts the coupling function from the cover bottom by creating a separate coupling hole structure. The supporting element passes through this dedicated coupling hole, separating the coupling mechanism from the main cover bottom structure, thereby preventing particle generation during assembly.
2Ease of manufacture
If particles are generated during the coupling process, then the supporting element can be assembled, but the particles block light and deteriorate image quality
Solution Approach 1:
The coupling hole acts as a mediator that guides the supporting element through the cover bottom, enabling easy assembly while preventing particle generation that would affect image quality. The intermediary structure ensures clean passage without mechanical interference.
Solution Approach 2:
The patent converts the potential harm of direct interference fitting (particle generation) into a beneficial coupling hole structure that enables assembly while eliminating the harmful effect. The coupling hole design transforms the assembly process into a particle-free operation.
3Stability of the object's composition
If the supporting element is disposed between the light-guide plate and viewing angle control unit, then structural support is provided, but particle generation during coupling affects the light path
Solution Approach 1:
The coupling hole serves as an intermediary that allows the supporting element to be positioned between the light-guide plate and viewing angle control unit for structural stability, while the hole structure itself prevents particle generation that would block the light path.
Data Source
AI summary
A display apparatus includes a back-light unit including a second light-guide plate disposed on a first light-guide plate and a light-source element; a liquid crystal panel on the second light-guide plate of the back-light unit; a first viewing angle control unit disposed between the first light-guide plate and the second light-guide plate of the back-light unit, the first viewing angle control unit including first light-blocking patterns; and a supporting element disposed between an edge of the first light-guide plate and an edge of the first viewing angle control unit, wherein the light-source element includes a first light-source on a side of the first light-guide plate, a second light-source on a side of the second light-guide plate, and a light-source circuit board in which the first light-source and the second light-source are mounted, and wherein the supporting element is in contact with a surface of the light-source circuit board between the first light-source and the second light-source, thereby preventing deterioration of an image quality due to particles generated during a coupling process of the supporting element.