Electro-Optic Element for Vehicle Display Light Protection
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Solution Overview
Problem
Display screens in vehicles and outdoor devices are vulnerable to damage from ambient light, particularly sunlight, ultraviolet, and infrared radiation, which can shorten their lifespan and affect their performance during use.
Innovation Solution
An electro-optic system that can switch between transparent and non-transparent states based on the device's status, using an electro-optic element mounted in front of the display screen to block harmful light when the device is not in use, thereby protecting the screen from environmental radiation and reducing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electro-optic element is kept transparent to allow display visibility, then the screen remains accessible and functional, but the display screen is exposed to harmful ambient light and heat
Solution Approach 1:
The electro-optic element dynamically changes its optical properties between transparent and non-transparent states based on operational requirements. When the device is in use, the EO element remains transparent for visibility; when not in use, it transitions to non-transparent to block harmful light, thus resolving the contradiction between accessibility and protection.
Solution Approach 2:
The system proactively blocks harmful ambient light before it can damage the display screen by switching the electro-optic element to non-transparent state during periods when the display is not actively being viewed, preventing cumulative light damage and heat buildup.
2Reliability
If the electro-optic element blocks light to protect the screen, then the display is protected from damage, but the screen becomes inaccessible during blocking periods
Solution Approach 1:
The electro-optic element operates in periodic cycles, alternating between transparent and non-transparent states based on device usage patterns. This periodic switching ensures the display receives adequate protection during idle periods while remaining fully accessible during active usage periods, balancing protection with availability.
3Object-affected harmful factors
If a protective layer is added to block UV rays, then the screen is protected from ultraviolet damage, but the device complexity increases
Solution Approach 1:
The electro-optic element serves multiple functions simultaneously: it acts as a switch for display visibility, a protective barrier against harmful ambient light including UV rays, and a heat management mechanism. This multi-functionality eliminates the need for separate protective layers, reducing overall device complexity while maintaining comprehensive protection.
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 system effectively extends the lifespan of display screens by preventing damage from ambient light and reducing electrical consumption, while maintaining the screen temperature within safe limits, ensuring continued functionality and energy efficiency.
Implementation Method 1
by applying electrical power to the electro-optic medium, the optical properties are changed, usually the orientation of the light (e.g. in VRM devices) or the intensity of light (e.g. in electrochromic devices)
Implementation Method 2
The working principle of an electro-optic is known: by applying electrical power to the electro-optic medium, the optical properties are changed... in electrochromic devices
Data Source
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AI summary
A method and system for operating a display device (20) of an object, e.g., a motor vehicle (1), comprising receiving either an ON status or an OFF status of the object by a controller connected to an electro-optic element (10) mounted in front of a display screen (21) and sending an instruction from the controller to the electro-optic element (10), wherein the instruction is generated by the controller based on the received status of the object and wherein the electro-optic element (10) acquires an optical state selected from transparent and non-transparent in response to the instruction received by the electro-optic element (10), and wherein the electro-optic element (10) in non-transparent state blocks light at least partially from passing through so as to prevent light from reaching the display screen (21) and wherein the electro-optic element (10) is in transparent state as long as the display device (20) is providing an image.