Electrochromic Dimming Device Without Detection Circuit
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Solution Overview
Problem
Conventional electrochromic driving devices require detection circuits for sequence and feedback control, limiting their ability to achieve continuous gradation and efficient color development/discharge operations.
Innovation Solution
An electrochromic dimming device and driving device are designed with an electrochromic element, variable resistance, color development/power sources, and a controller, allowing for continuous gradation and arbitrary gradation settings without a detection circuit, using a configuration where the variable resistance is only on the current path during color development, enabling efficient color discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detection circuit is used for sequence control and feedback control in electrochromic driving devices, then control precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts and removes the detection circuit from the electrochromic driving device. Instead of using a detection circuit to monitor electrochromic element properties, the invention uses a simple switching circuit with a variable resistance element that can be controlled without feedback. This eliminates the complex detection and feedback control systems while maintaining effective control of the electrochromic element through open-loop switching control.
2Speed
If sequence control and feedback control are implemented, then color development responsiveness is improved, but loss of time increases due to detection requirements
Solution Approach 1:
The patent implements preliminary action by pre-configuring the switching circuit with the variable resistance element in specific positions before operation. The circuit is designed with predetermined resistance values and switching paths that enable immediate color development without requiring real-time detection or feedback adjustment. This pre-arranged configuration allows rapid response when voltage is applied to the electrochromic element.
3Manufacturing precision
If a detection circuit is installed for feedback control, then manufacturing precision of color density is improved, but ease of manufacture decreases
Solution Approach 1:
The patent uses parameter changes by varying the resistance value of the variable resistance element in the switching circuit to control the color density of the electrochromic element. Instead of using complex detection circuits to achieve precise color control, the invention manipulates electrical parameters (resistance values) in the circuit to directly achieve the desired color density. This approach maintains manufacturing precision while significantly simplifying the device structure and ease of manufacture.
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 enables continuous gradation and efficient color development/discharge operations without a detection circuit, ensuring high responsiveness and maintaining transmittance, while preventing residual color discharge.
Implementation Method 1
Electrochromic elements that reversibly cause oxidation and reduction reactions upon application of a voltage generally contain a colorant which develops and discharges color by the oxidation and reduction reactions
Implementation Method 2
The variable resistance is disposed on a first current path without being disposed on a second current path
Data Source
AI summary
An electrochromic dimming device is provided. The electrochromic dimming device includes an electrochromic element, a color development power source, a color discharge powder source, and a variable resistance. The color development power source supplies electric power to the electrochromic element when the electrochromic element develops color. The color discharge powder source supplies electric power to the electrochromic element when the electrochromic element discharges color. The variable resistance is disposed on a first current path without being disposed on a second current path. The first current path is formed from the color development power source through a ground via the electrochromic element, and the second current path is formed from the color discharge power source to the ground via the electrochromic element.