In-Car LCD Optical Sheet Support for Thin Rigidity
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Solution Overview
Problem
In-car liquid crystal display devices require a balance between being thinner with a narrower frame while maintaining rigidity and strength against impacts and oscillations within a wide temperature range, which existing designs struggle to achieve effectively.
Innovation Solution
The design incorporates a case with a backlight device, a liquid crystal panel, a first holding member on the side plate, and a second holding member that interposes between the optical sheet and the rear surface of the liquid crystal panel to cover the light source device, allowing for a thinner profile with enhanced mechanical strength and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the liquid crystal display device is made thinner with a narrower frame, then the device thickness and frame area are reduced, but the rigidity and strength against impacts and oscillations deteriorate
Solution Approach 1:
The patent introduces a support member that extends in the thickness direction (third dimension) from the rear surface of the liquid crystal panel toward the backlight device. This vertical extension provides structural reinforcement without increasing the device's planar dimensions, effectively adding strength in the thickness dimension while maintaining a thin profile.
Solution Approach 2:
The support member is constructed from a foam material that combines rigidity with lightweight properties. This composite approach allows the thin device to maintain sufficient structural strength against impacts and oscillations while keeping the overall thickness minimized, resolving the contradiction between thinness and strength.
2Area of stationary object
If the frame area is reduced to achieve a narrower frame, then the aesthetic appearance and thinness are improved, but the mechanical support and structural stability deteriorate
Solution Approach 1:
Instead of relying on a wide frame for structural stability, the patent introduces a support member that extends vertically in the thickness direction. This creates a three-dimensional support structure that compensates for the reduced frame area, maintaining structural stability without requiring a large frame footprint.
Solution Approach 2:
The support function is segmented from the frame structure and implemented as a separate support member. This allows the frame area to be minimized while the support member provides dedicated structural reinforcement, separating the aesthetic function (narrow frame) from the structural function (support member).
Data Source
AI summary
According to one embodiment, a display device includes a liquid crystal panel, a case covering a rear surface side of the liquid crystal panel, a backlight device disposed in the case and opposed to the liquid crystal panel with a gap, a first holding member provided on a side plate of the case, and a second holding member including a fixation part attached to the side plate of the case, and a second holding part interposed between an optical sheet and a rear surface of the liquid crystal panel to cover a light source device and an end part of the optical sheet on the light source device side.