Tilted Reflective Light Homogenizing Structure for Display Panels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing front light sources for reflective display devices, which include a light guide plate with a dot structure, result in lower definition and uneven color due to granular sensations on displayed images and absorption of blue light, respectively.
Innovation Solution
A light homogenizing structure comprising a transparent substrate with tilted reflective surfaces of light homogenizing units positioned between pixels on the display panel, allowing light rays to directly enter the display panel without interference and minimizing blue light absorption by using air as the transmission medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate with dot structure is used to diffuse light, then light distribution is improved, but image definition deteriorates due to granular sensations on displayed images
Solution Approach 1:
The patent extracts and removes the dot structure from the light guide plate, replacing it with a reflective layer that has a different surface structure. This eliminates the granular sensation caused by the dot structure while maintaining light diffusion functionality through the reflective properties of the new structure.
Solution Approach 2:
The patent changes the surface structure parameters of the light guide plate by introducing a reflective layer with specific surface roughness and reflectivity characteristics. This parameter change allows the surface to diffuse light effectively without creating the granular visual artifacts associated with dot structures.
2Illumination intensity
If a light guide plate is used to transmit light, then light guidance is improved, but color uniformity deteriorates due to absorption of blue light
Solution Approach 1:
The patent converts the harmful absorption of blue light by the light guide plate material into a beneficial configuration by positioning the reflective layer to redirect light paths. This ensures that blue light components are not lost through absorption but are instead reflected and redistributed, maintaining color uniformity across the display.
3Illumination intensity
If a reflective layer is added to the light guide plate, then light reflection is improved, but device complexity increases
Solution Approach 1:
The patent merges the reflective layer with the light guide plate structure, integrating the reflection function directly into the existing component rather than adding it as a separate element. This integration approach improves light reflection efficiency while minimizing the increase in device complexity.
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
Improves image definition and color uniformity by ensuring light rays are not affected by the homogenizing structure and reducing blue light absorption, resulting in a more homogeneous and clear display.
Implementation Method 1
a surface of each of the light homogenizing units away from the transparent substrate is a reflective surface tilted relative to the transparent substrate, light rays emitted from the light-emitting unit facing a light entry surface of the light homogenizing structure are incident into the display panel after being reflected on the reflective surface
Data Source
AI summary
The present disclosure provides a light homogenizing structure, a front light source and a display device. The light homogenizing structure comprises a transparent substrate and a plurality of light homogenizing units arranged on a surface of the transparent substrate facing the display panel; wherein a surface of each of the light homogenizing units away from the transparent substrate is a reflective surface tilted relative to the transparent substrate, light rays emitted from the light-emitting unit facing a light entry surface of the light homogenizing structure are incident into the display panel after being reflected on the reflective surface, the light entry surface is other than a surface of the light homogenizing structure facing the display panel and its opposite surface, and an orthographic projection of one of the light homogenizing units on the display panel is located on a border between pixels of the display panel.