Light Guide Plate Side Protrusions for Uniform Luminance
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Solution Overview
Problem
Display panels with non-quadrangular shapes experience non-uniform light incidence on the light guide plate, leading to reduced display quality.
Innovation Solution
The display panel incorporates a light guide plate with side surfaces featuring regions with protrusions that alter the direction of light travel, including conical or pyramidal prisms to refract light and ensure uniform luminance across the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel has a planar shape other than quadrangle, then designability is improved, but the density of light incident on the light guide plate becomes non-uniform and display quality is lowered
Solution Approach 1:
The light guide plate incorporates protrusions at specific locations (on the side surfaces) to locally modify light propagation. These protrusions create regions with different optical properties that compensate for the non-uniform light incidence caused by the non-quadrangular panel shape, thereby achieving uniform luminance distribution across the display area.
Solution Approach 2:
The protrusions on the side surfaces of the light guide plate introduce curved or angled surfaces that redirect light paths. By incorporating these curved surface features, the patent adjusts the light propagation direction to compensate for the non-quadrangular panel geometry, ensuring uniform light distribution across the display area.
2Manufacturing precision
If protrusions are added to the light guide plate to uniform light distribution, then display quality is improved, but device complexity increases
Solution Approach 1:
The side surfaces of the light guide plate are divided into multiple regions, each containing protrusions. This segmentation allows the complex light redirection function to be distributed across multiple simpler protrusion elements rather than requiring a single complex optical component, making the overall structure more manageable and manufacturable.
Solution Approach 2:
The protrusions modify the physical parameters of the light guide plate by changing the surface geometry (adding height, angle, and curvature variations). These parameter changes enable the light guide plate to redirect and distribute light uniformly without requiring fundamental redesign of the entire display panel structure.
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 enhances luminance uniformity, improving display quality by ensuring adequate light distribution and reducing non-uniformity in non-quadrangular display panels.
Implementation Method 1
The second region and the third region each include a plurality of protrusions capable of changing a traveling direction of light
Data Source
AI summary
Performance of a device is improved. A light guide plate of a display device includes a side surface (first side surface) facing a light source unit and extending along an X direction, a second side surface continuous with a first end of the first side surface and forming a curved surface, and a third side surface continuous with a second end of the first side surface and forming a curved surface. The side surface includes a first region, a region (second region) located between the first region and the second side surface and continuous with the second side surface, and a third region located between the first region and the third side surface and continuous with the third side surface. The region and the third region each include a plurality of protrusions capable of changing a traveling direction of light.