Transparent Display Illumination via Rear-Side LED Mounting
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Solution Overview
Problem
Existing display apparatuses with transparent panels require a protruding guide portion for illumination, leading to increased size and reduced illumination efficiency.
Innovation Solution
Mounting the movement on the front surface of the board, the indicator on the rear surface, and the light source on the board to oppose the outer peripheral surface of the transparent display panel, eliminating the need for a protruding guide portion and aligning the light source's optical axis parallel to the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a guide portion protruding toward the rear surface side is provided at the transparent display panel to illuminate the panel, then the illumination function is achieved, but the size of the display apparatus becomes large
Solution Approach 1:
The light source is repositioned from the traditional front-side illumination to the rear surface side of the transparent display panel. This dimensional change allows light to enter through the outer peripheral surface from the rear side, eliminating the need for a front-side guide portion and reducing the overall apparatus size while maintaining effective illumination of the display panel.
Solution Approach 2:
The board serves as an intermediary structure that holds both the light source and the transparent display panel in precise spatial relationship. By mounting the light source on the board at a position opposing the outer peripheral surface of the panel, the board mediates the light path from the rear side, enabling compact integration without requiring the light source to be physically attached to the panel itself.
2Illumination intensity
If a guide portion protruding toward the rear surface side is provided at the transparent display panel to guide light, then light guidance is achieved, but the illumination efficiency is degraded
Solution Approach 1:
The guide portion is extracted from the transparent display panel structure and its function is transferred to the board-mounted light source configuration. By removing the protruding guide portion and positioning the light source to oppose the outer peripheral surface from the rear side, light can directly enter the panel without being blocked or scattered by a guide structure, thereby improving illumination efficiency.
Solution Approach 2:
Instead of guiding light from the front side through a protruding guide portion, the illumination approach is inverted to enter light from the rear side through the outer peripheral surface. This inversion of the light path direction eliminates the need for a guide portion and reduces light loss, as light directly illuminates the display panel from the rear without encountering obstructive structures.
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 miniaturizes the display apparatus while enhancing illumination efficiency and improving indicator visibility.
Implementation Method 1
a light ray from the light source can be entered from the outer peripheral surface of the transparent display panel and conducted to the transparent display panel
Data Source
AI summary
To provide a display apparatus which is intended to improve the miniaturization and illumination efficiency, an indicator 8 is disposed on the rear surface side of a transparent display panel 3. A printed board 5 mounts a movement 7 on the front surface thereof so as not to overlap the movement 7 and the transparent display panel 3 and mounts the indicator 8 on the rear surface thereof. LEDs 6 for the transparent display panel are mounted on the front surface of the printed board 5 so as to oppose to the outer peripheral surface of the transparent display panel 3.