Ultra-Slim Bezel Display Apparatus for Video Wall Image Distortion
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Solution Overview
Problem
Conventional display apparatuses with liquid crystal display devices suffer from image distortion when forming a video wall due to the structural limitations of their backlight assemblies, particularly in large-scale displays requiring high brightness, which affects the mechanical and optical characteristics.
Innovation Solution
A display apparatus with an ultra-slim bezel design, featuring a transparent fixing mold with a prism portion and a reflective surface, along with an optical sheet and diffusing plate, to enhance image projection and reduce light leakage, thereby improving image uniformity and size perception across multiple displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional backlight assembly structure is used in large-scale liquid crystal display devices, then high brightness is achieved, but image distortion occurs when forming video walls
Solution Approach 1:
The patent replaces the conventional direct-type backlight assembly with an edge-type backlight assembly that uses light guides and optical sheets to distribute light. This substitution changes the mechanical structure from multiple parallel lamps directly illuminating the panel to a single edge light source that propagates light through optical elements, thereby achieving uniform brightness across large display areas without image distortion when forming video walls
Solution Approach 2:
The patent introduces optical sheets and light guides as intermediary elements between the light source and the liquid crystal display panel. These intermediaries distribute and uniformize the light across the display area, eliminating the image distortion problems that occur with conventional direct-type backlight assemblies in large-scale video wall configurations
2Area of stationary object
If multiple display apparatuses are arranged to form a video wall, then large-scale display is achieved, but inactive regions between adjacent displays cause image distortion
Solution Approach 1:
The patent extracts and eliminates the inactive bezel regions between adjacent display apparatuses by using an edge-type backlight design with optical sheets that can be precisely positioned. This allows the active display area to extend to the very edges of the panel, removing the black borders that cause image distortion in video wall configurations and enabling seamless image continuity across multiple displays
Solution Approach 2:
The patent addresses the two-dimensional problem of bezel gaps by extending the light distribution in the third dimension through the use of optical sheets and light guides that propagate light from the edge throughout the entire panel thickness and area. This dimensional approach allows uniform light distribution that eliminates the visual impact of inactive regions when displays are arranged in a video wall
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces image distortion and maintains uniform brightness across the display panel, providing a larger perceived image size and improved image quality by minimizing inactive regions between adjacent displays in a video wall configuration.
Implementation Method 1
The bezel portion may include a prism portion on a rear surface of the bezel portion. An image displayed beyond a periphery of the display panel may be the same as an image projected on the part of the display panel covered by the bezel portion.
Implementation Method 2
The side surface portion comprises an outer surface thereof with a reflective portion such that light introduced to the outer surface of the side surface portion is reflected toward an inner surface of the side surface portion.
Implementation Method 3
A diffusing plate at the rear of the display panel
Data Source
AI summary
A display apparatus capable of improving distortion of an image displayed on a video wall by having the display apparatus provided with an ultra-slim bezel. The display apparatus includes a display panel on which an image is displayed, a light source positioned at a rear of the display panel, a bottom chassis in which the light source is accommodated, and a fixing mold configured to fix a front surface of the display panel and formed of transparent material, wherein the fixing mold is provided at an inner surface thereof with an accommodation portion into which a side end of the display panel is inserted so that the display panel is fixed.