Video Display Device with Rotating Starry-Sky Projection Plates
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Solution Overview
Problem
Conventional video display devices cannot accurately reproduce the movement of stars in a starry sky, as they lack the ability to rotate the starry-sky projection negative plate, resulting in an incomplete representation of the celestial phenomenon.
Innovation Solution
A video display device that includes a starry-sky projection negative plate, a twinkling negative plate with uneven light-transmitting properties, and an actuation mechanism with an actuator to rotate both plates independently, allowing for the reproduction of star movement and twinkling effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only the twinkling negative plate is rotated to reproduce star twinkling, then the twinkling effect is achieved, but the movement of stars across the sky cannot be reproduced
Solution Approach 1:
The patent divides the rotation control into two independent segments: one actuator controls the twinkling negative plate for twinkling effects, while another actuator controls the starry-sky projection negative plate for star movement. This segmentation allows each plate to be optimized for its specific function while maintaining overall system reliability.
Solution Approach 2:
The patent implements dynamic control by enabling independent rotation of both negative plates at different speeds and directions. The twinkling plate rotates to create blinking effects, while the starry-sky plate rotates to simulate celestial movement, creating a dynamically realistic starry sky representation.
2Reliability
If the starry-sky projection negative plate is rotated to reproduce star movement, then the movement effect is achieved, but the twinkling effect is lost
Solution Approach 1:
The patent separates the control functions by assigning independent actuators to each negative plate. One actuator specifically controls the starry-sky projection plate for movement reproduction, while another controls the twinkling plate, simplifying the operational control of each function.
Solution Approach 2:
The patent introduces an intermediary control system that coordinates the rotation of both plates independently. This intermediary mechanism manages the complex coordination between twinkling and movement effects, making the overall system easier to operate while maintaining high fidelity reproduction.
3Reliability
If both negative plates are rotated independently, then both twinkling and star movement are reproduced faithfully, but the device complexity increases
Solution Approach 1:
The patent merges the support and actuation functions by integrating both actuators into a unified mounting structure on the housing. This consolidation reduces overall device complexity while enabling independent rotation of both negative plates for complete starry sky reproduction.
Solution Approach 2:
The patent creates a multi-functional actuation system where the housing structure serves as a universal mounting platform for both actuators, and the transmission mechanism can drive both plates. This universality reduces the need for separate specialized components, lowering overall device complexity.
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
The device effectively reproduces the movement and twinkling of stars, providing a more faithful representation of an actual starry sky by rotating both the starry-sky and twinkling negative plates at different angular velocities or directions.
Implementation Method 1
radiation of light having penetrated the starry-sky projection negative plate onto a target surface via a projection lens
Implementation Method 2
projects and displays video including starry sky images corresponding to a starry-sky projection negative plate onto a target surface by radiation of light having penetrated the starry-sky projection negative plate onto a target surface via a projection lens
Implementation Method 3
a twinkling negative plate with uneven light-transmitting properties
Implementation Method 4
an actuation mechanism that includes an actuator, and rotationally actuates, by power from the actuator, the starry-sky projection negative plate and the twinkling negative plate
Data Source
AI summary
The present invention addresses the problem of providing a video display device that projects and displays video including starry sky images onto a target surface, that can reproduce the twinkling of stars and that can more faithfully reproduce an actual starry sky. Provided are a light source, a projection lens, a starry-sky projection negative plate, a twinkling negative plate with uneven light-transmitting properties, a starry-sky-end support unit that supports the starry-sky projection negative plate in a location onto which light from the light source is radiated, a twinkling-end support unit that supports the twinkling negative plate between the starry-sky projection negative plate and the projection lens or between the light source and the starry-sky projection negative plate, and an actuation mechanism that rotationally actuates, by power from an actuator, the starry-sky projection negative plate in a state of being supported by the starry-sky-end support unit and the twinkling negative plate in a state of being supported by the twinkling-end support unit. Light that has penetrated the starry-sky projection negative plate and the twinkling negative plate is radiated onto the target surface via the projection lens.