Curved Optical Member Supporter for Uniform Luminance
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Solution Overview
Problem
As display devices increase in size, the viewing angle difference between the center and the edges of the screen leads to non-uniform luminance due to the detachment of optical members from their supporters, particularly at the center, causing uneven light distribution.
Innovation Solution
A display device design that maintains a uniform interval between the light source and the optical member by using a curved optical member supporter coupled to both the optical member and the lower frame, with a coupling member that extends through a guide hole and is seated in a groove, ensuring the optical member remains in contact and aligned with the light path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the screen size is increased, then the display area is enlarged, but the viewing angle difference and luminance uniformity deteriorate due to optical member detachment
Solution Approach 1:
The optical member supporter is designed with a curved surface that matches the curvature of the optical member, enabling the supporter to maintain consistent contact and support across the entire surface. This curved geometry prevents detachment at the center portion and ensures uniform luminance distribution across the enlarged display area.
Solution Approach 2:
The optical member supporter extends in the thickness direction of the display device, transitioning from a two-dimensional planar support to a three-dimensional volumetric structure. This additional dimension allows the supporter to provide robust support that prevents optical member detachment while maintaining luminance uniformity across the large screen area.
2Device complexity
If a flat optical member supporter is used, then the structure is simple, but the optical member detaches at the center portion causing non-uniform luminance
Solution Approach 1:
The optical member supporter incorporates a curved surface that conforms to the curvature of the optical member, ensuring continuous and uniform contact across the entire support area. This curved geometry prevents the optical member from detaching at the center portion, thereby maintaining reliable optical contact and uniform luminance distribution.
3Ease of manufacture
If the interval between light source and optical member is non-uniform, then the structure is easier to manufacture, but the luminance becomes non-uniform across the display
Solution Approach 1:
The curved surface of the optical member supporter maintains a uniform distance from the light source across the entire display area. This curved geometry ensures that the optical member remains at a consistent interval from the light source, producing uniform luminance distribution across the display while remaining manufacturable through standard curved surface fabrication processes.
Data Source
AI summary
A display device includes: a display panel curved in a direction; a lower frame in which the display panel is accommodated, the lower frame curved in the direction in which the display panel is curved; an optical member between the display panel and the lower frame, the optical member curved in the direction in which the display panel is curved; and an optical member supporter of which an upper end portion thereof is coupled to the optical member curved in the direction in which the display panel is curved and an opposing lower end portion thereof is coupled to the lower frame curved in the direction in which the display panel is curved.