Light-Guiding Cover Plate with Reflective Inclination Surfaces
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Solution Overview
Problem
Electronic devices with light-emitting functions often experience uneven light emission due to the configuration of light-transmitting regions, resulting in excessive luminance on some areas and reduced luminance on others.
Innovation Solution
The electronic device incorporates a casing with a light-guiding cover plate, a light-shielding member, and reflective inclination surfaces on light-guiding members to redirect light emitted by the light-emitting element, preventing excessive luminance on adjacent areas and ensuring uniform illumination by reflecting light to non-adjacent areas of the cover plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-transmitting region is provided in the casing to correspond to the light-emitting element, then the light emitted by the light-emitting element can directly pass through the light-transmitting region, but parts of the light-transmitting region closer to the light-emitting element have higher luminance while parts farther from the light-emitting element have reduced luminance, resulting in uneven light emission
Solution Approach 1:
The patent introduces a light-guiding member as an intermediary component between the light-emitting element and the light-transmitting region. This member includes reflective surfaces that redirect light paths, serving as a mediator to distribute light more uniformly across the light-transmitting region, thereby resolving the uneven luminance distribution while maintaining direct light transmission.
Solution Approach 2:
The patent employs reflective inclination surfaces on the light-guiding member that redirect light in different spatial directions. By changing the dimensional distribution of light paths through controlled reflection angles, the light is redirected from concentrated areas near the light-emitting element to broader areas of the light-transmitting region, achieving more uniform illumination.
2Productivity
If the light-emitting element is positioned adjacent to the light-transmitting region, then light transmission is efficient, but excessive luminance occurs on portions of the light-guiding cover plate adjacent to the light-emitting element
Solution Approach 1:
The patent segments the light-guiding cover plate into different functional regions: a light-transmitting region and a non-light-transmitting region. The light-shielding member further segments the light path by blocking direct light from reaching certain areas. This segmentation allows efficient light transmission through designated regions while preventing excessive luminance in adjacent areas through strategic placement of shielding and guiding elements.
Solution Approach 2:
The patent applies different optical properties to different parts of the system. The light-guiding member has reflective surfaces in specific locations to redirect light, while other parts have light-transmitting properties. The light-shielding member provides localized blocking in specific areas. This local differentiation of optical qualities enables efficient light transmission where needed while controlling excessive luminance in adjacent regions.
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
This configuration prevents excessive luminance on specific portions of the light-guiding cover plate and expands the illumination range, achieving uniform illumination across the device.
Implementation Method 1
the first reflective inclination surface is configured to reflect a light emitted by the light-emitting element to be a first reflected light
Implementation Method 2
the second reflective inclination surface is configured to reflect the first reflected light to be a second reflected light, and the second reflected light is irradiated to the second partial block of the light-guiding cover plate
Data Source
AI summary
An electronic device with light emitting function includes a casing, a circuit board, a light-shielding member, a first light-guiding member, and a second light-guiding member. The casing has a light-guiding cover plate having a first partial block and a second partial block. The circuit board has a light-emitting element adjacent to the first partial block. The light-shielding member is blocked between the light-emitting element and the first partial block. The first light-guiding member has a first reflective inclination surface at a light-emitting direction of the light-emitting element and configured to reflect a light emitted by the light-emitting element to be a first reflected light which is transmitted toward a direction away from the first partial block. The second light-guiding member has a second reflective inclination surface configured to reflect the first reflected light to be a second reflected light which is irradiated to the second partial block.