Display Attenuation Portion Thickness Gradient for Smooth Luminance
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Solution Overview
Problem
Existing display technologies face challenges in expressing a smooth or continuous gradation of light and shade, as conventional printing methods tend to produce stepwise changes in luminance, making it difficult to achieve a seamless decrease in light output from the center to the edges of a light luminous region.
Innovation Solution
A display apparatus with a light source and a transmissive member featuring a light input face, a light output face with a belt-like shape, and an attenuation portion between them, where the thickness of the attenuation portion increases from the center to the edges, allowing for continuous attenuation of light and a smooth decrease in luminance from the center to the edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If printing with dots is used to create gradation on the light output face, then the structure is simple and easy to manufacture, but the luminance change becomes stepwise rather than smooth
Solution Approach 1:
The patent changes the physical parameter of the attenuation portion from a printed pattern (2D density variation) to a three-dimensional structure with varying thickness. By controlling the thickness parameter of the attenuation portion across different regions, the patent achieves continuous luminance gradation without the stepwise effect inherent in printing methods.
Solution Approach 2:
The patent transitions from a two-dimensional printing approach to a three-dimensional structure by introducing thickness variation as an additional dimension. The attenuation portion is formed with different thicknesses at different positions, creating smooth luminance gradation through spatial dimensionality rather than relying on dot density patterns.
2Device complexity
If the attenuation portion has uniform thickness, then the structure is simple, but the luminance cannot decrease smoothly from center to edges
Solution Approach 1:
The patent applies local quality by making different portions of the attenuation portion have different thicknesses. The central portion has a first thickness while the end portions have a second thickness greater than the first, creating localized variations in light attenuation that produce the desired luminance gradation effect.
Solution Approach 2:
The attenuation portion is segmented into different thickness zones - a central region with lesser thickness and end regions with greater thickness. This segmentation allows independent control of luminance at different positions, enabling smooth gradation from the bright center to the darker edges.
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 enables a smooth and continuous reduction in light output, allowing the light luminous region to display a gradual decrease in luminance without steps, enhancing the visual appearance and effectively expressing the gradation of light and shade.
Implementation Method 1
an attenuation portion arranged between the light input face and the light output face to attenuate the light transmitting from the light input face to the light output face
Data Source
AI summary
A display apparatus provides a display region to display information, and a peripheral light luminous region to output light. The display apparatus includes an indicator light source and a coloring transmissive member made of light transmissive material. The coloring transmissive member includes a light input face where the light emitted from the indicator light source enters; a light output face with a belt-like shape in an extended direction to form the light luminous region by outputting light inputted from the light input face; and an attenuation portion attenuating light transmitting from the light input face to the light output face. The attenuation portion has a thickness between the light input face and the light output face. The thickness changes to increase in the extended direction of the light output face as going from a central portion towards each of both end portions.