Symbol Illumination Apparatus with Lens and Diffusion Sheets
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Solution Overview
Problem
In video display apparatuses using PDP or liquid-crystal panels, light from LEDs is often reflected at the bottom of the transparent member, impairing quality and causing light leakage, which is noticeable in dark environments.
Innovation Solution
A symbol illumination apparatus is designed with a lens sheet and diffusion sheet inserted between the transparent member and LEDs, preventing light reflection and leakage by ensuring even and smooth light distribution, and incorporating a gradational design on the transparent member to absorb excess light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a plurality of light-emitting diodes are used as light sources, then the symbol illumination is achieved, but light rays are reflected at the bottom of the transparent member, impairing quality
Solution Approach 1:
A reflective sheet is introduced as an intermediary component between the transparent member and the light sources. This reflective sheet intercepts light rays that would otherwise reflect off the bottom of the transparent member, converting harmful reflections into useful illumination that directs light toward the symbol, thereby eliminating the quality impairment while maintaining effective symbol lighting.
2Illumination intensity
If light sources are positioned to illuminate the symbol, then the symbol is illuminated, but redundant light leaks to another side and reflects on the stand section or table, causing noticeable light leakage in dark rooms
Solution Approach 1:
The reflective sheet serves as a mediator that captures and redirects light that would otherwise leak through the transparent member. By positioning the reflective sheet at the bottom of the transparent member, it intercepts redundant light rays and reflects them upward toward the symbol, preventing light leakage to the stand section or table while enhancing symbol illumination.
Solution Approach 2:
The reflective sheet converts the harmful effect of light leakage into a beneficial effect. Light that would otherwise be wasted by leaking through the transparent member and causing visibility issues in dark rooms is instead reflected upward to illuminate the symbol more effectively, transforming a harmful phenomenon into a useful contribution to the illumination function.
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 arrangement enhances the quality of symbol illumination by eliminating light reflections and leaks, creating a more immersive and visually appealing effect by maintaining light within the display.
Implementation Method 1
a lens sheet and a diffusion sheet are inserted between this transparent member and the plurality of light sources
Implementation Method 2
a lens sheet and a diffusion sheet are inserted between this transparent member and the plurality of light sources
Implementation Method 3
a reflective sheet may be arranged to extend over a bottom of this transparent member
Data Source
AI summary
The present invention provides a symbol illumination apparatus configured to have a symbol such as characters printed on a front surface of a transparent member, and to allow light from a plurality of light sources to pass through an interior of the transparent member from one side of the transparent member, to illuminate the symbol. A lens sheet and a diffused sheet are inserted between the transparent member and the plurality of light sources in the symbol illumination apparatus. This configuration prevents a plurality of light rays from being seen on the bottom of the transparent member.