VFD Display Color Conversion Filter to Reduce Cost and Extend Lifetime
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Solution Overview
Problem
Cooking appliances with vacuum fluorescent display (VFD) modules face increased product costs due to higher costs for white light VFDs, which have shorter lifetimes compared to green light VFDs, necessitating a cost-effective solution to provide white light while maintaining display clarity and longevity.
Innovation Solution
Incorporating a color conversion filter, such as polycarbonate or ABS material, positioned in front of the VFD module to convert green light emitted by the VFD into white light perceived by the user, thereby reducing material costs and extending the perceived display lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a white light VFD module is used to provide white light display, then the display clarity and user perception are improved, but the product cost increases and lifetime decreases
Solution Approach 1:
The patent applies color conversion by placing a color conversion filter in front of a green light VFD module to convert the green light into white light. This allows the display to provide white light output (improving display clarity and user perception) while using a more reliable green light VFD module (maintaining or extending lifetime and reducing cost).
2Illumination intensity
If a white light VFD module is used to provide white light display, then the display clarity is improved, but the product cost increases
Solution Approach 1:
The patent uses a color conversion filter to convert green light from a cost-effective VFD module into white light. This approach provides white light display output while using a less expensive green light VFD module, thereby reducing product cost while maintaining display clarity.
3Reliability
If a green light VFD module is used to reduce cost and extend lifetime, then the reliability and ease of manufacture are improved, but the display clarity and user perception deteriorate
Solution Approach 1:
The patent places a color conversion filter in front of the green light VFD module to convert the green light into white light. This allows the system to use the reliable and cost-effective green light VFD module while providing white light output that maintains or improves display clarity and user perception.
Solution Approach 2:
The color conversion filter acts as an intermediary between the green light VFD module and the user's eye. It converts the green light into white light, allowing the green light module to be used while the user perceives white light display, thus resolving the contradiction between module reliability and display quality.
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 solution effectively converts green light from VFDs into white light, enhancing user perception while reducing product costs and maintaining display clarity, thus addressing the cost and longevity issues associated with traditional white light VFDs.
Implementation Method 1
a color conversion filter arranged at a front of the display module and configured to convert the light of the first color irradiated from the display module to light of a second color
Data Source
AI summary
A cooking appliance comprises a cabinet and a cooking unit provided in the cabinet and configured to perform cooking of food using a heat source. The cooking appliance also includes a display device configured to display cooking information for the cooking unit. The display device includes a display module configured to irradiate light of a first color to display information for a user and a circuit board arranged at a rear of the display module and configured to control the display module and supply power to the display module. The display device also includes a color conversion filter arranged at a front of the display module and configured to convert the light of the first color irradiated from the display module to light of a second color. The cooking appliance converts the color of light irradiated from the display module to a desired color by using the color conversion filter.