Rear Projection Cloth Screen for Eye-Strain Relief Displays
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Solution Overview
Problem
Current electronic display devices, such as TVs, computer monitors, and smartphones, emit excessive light, causing eye strain and discomfort due to high light exposure, and existing solutions either reduce image quality or require permanent modifications.
Innovation Solution
A rear projection display device (RPD) that uses a flexible white cloth sheet to absorb light from the back and project it onto the front, reducing direct light exposure while maintaining image quality, and is attracted to the display via electrostatic induction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the brightness of the display is turned down or set to natural mode, then light exposure is reduced, but image quality and color vibrancy diminish
Solution Approach 1:
A white cloth sheet is introduced as an intermediary between the display and the viewer. The cloth sheet absorbs light from the display and re-emits it, acting as a mediator that reduces direct light exposure while preserving image quality. This resolves the contradiction by allowing the display to maintain full brightness while the cloth sheet filters and softens the light reaching the viewer's eyes.
Solution Approach 2:
The white cloth sheet changes the spectral characteristics of the light by absorbing and re-emitting it with different properties. The cloth sheet maintains the color information from the display while altering the intensity and distribution of light, thereby preserving image vibrancy while reducing harmful light exposure.
2Object-affected harmful factors
If rear lights and ambient lighting are installed to engulf the display, then eye relaxation is improved, but energy consumption increases and device complexity increases
Solution Approach 1:
The white cloth sheet utilizes the existing light from the display itself, requiring no additional power source. The cloth sheet reflects and redistributes the display's light in a way that creates ambient illumination effects without consuming extra energy. This resolves the contradiction by achieving eye relaxation benefits without the energy penalty of additional lighting systems.
Solution Approach 2:
The cloth sheet serves multiple functions simultaneously: it acts as a light filter, an ambient light source, and a protective cover. This multi-functionality resolves the contradiction by eliminating the need for separate ambient lighting systems, thereby reducing energy consumption while maintaining eye relaxation benefits.
3Object-affected harmful factors
If a plastic laminate is used to cover the display, then light exposure is reduced, but the device becomes permanently attached and devalued
Solution Approach 1:
A flexible white cloth sheet is used instead of rigid plastic laminate. The cloth sheet can be easily placed and removed without permanent attachment, maintaining the adaptability and versatility of the display device while providing the same light-filtering function. This resolves the contradiction by eliminating the permanent attachment issue associated with plastic laminates.
Solution Approach 2:
The cloth sheet is designed as a simple, removable accessory that can be easily replaced if needed. This approach resolves the contradiction by providing a non-permanent solution that protects the display value while delivering the desired light exposure control. The cloth sheet can be removed without damaging the display, unlike permanent laminates.
4Manufacturing precision
If the display is made larger to provide better viewing, then image quality improves, but light exposure increases and causes eye strain
Solution Approach 1:
The white cloth sheet serves as a mediator between large displays and viewers. It allows the display to maintain large size for high image quality while the cloth sheet filters and softens the light, reducing the harmful effects of increased light exposure. This resolves the contradiction by enabling larger display sizes without proportionally increasing eye strain.
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
Provides a relaxed viewing experience by attenuating light pollution and preserving image vibrancy, with the RPD device being adaptable, removable, and suitable for various display types without permanent attachment.
Implementation Method 1
the flexible white cloth sheet having an inner surface and an outer surface, the flexible cloth sheet being configured to absorb light emitted by a display behind the inner surface and to display the light absorbed on the outer surface
Implementation Method 2
The RPD device becomes attracted to a digital display by electrostatic induction
Data Source
AI summary
A rear projection display device for use with a display. The rear projection display device includes a flexible white cloth sheet having an inner surface and an outer surface, the flexible cloth sheet being configured to absorb light emitted by a display behind the inner surface and to display the light absorbed on the outer surface for viewing ahead of the display, while placed in front of the display and in contact with a front of the display.