LED Bulb Dimming Control via Toggle Switch Pattern Detection
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Solution Overview
Problem
Existing LED dimmer bulb technologies do not effectively save the dimming level when the light switch is turned OFF, and they require a dedicated dimmer switch, limiting their compatibility with standard ON-OFF toggle switches.
Innovation Solution
A Microcontroller with Embedded Firmware and an AC to DC converter is used to detect the ON-OFF light switch patterns, producing dimming patterns that save the dim point in non-volatile EEPROM, allowing the LED bulb to maintain the dim level when the switch is OFF and using a standard ON-OFF toggle switch for power and dim control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a standard ON-OFF toggle switch is used for power control, then compatibility with existing light switches is improved, but the ability to control dimming levels is lost
Solution Approach 1:
The patent makes the LED bulb universal by enabling it to work with both standard ON-OFF toggle switches and dimmer switches. The bulb's internal microcontroller detects the switch type and adapts its operation accordingly, allowing a single bulb design to serve multiple functions and compatibility scenarios without requiring separate products for different switch types.
Solution Approach 2:
The patent introduces a specialized controller chip as an intermediary between the standard ON-OFF toggle switch and the LED driver circuitry. This mediator detects the switching patterns from the simple toggle switch and translates them into appropriate dimming control signals, enabling dimming functionality without requiring a dedicated dimmer switch at the wall.
2Device complexity
If the dimming level is not saved when switch is turned OFF, then device complexity is reduced, but the dimming level cannot be recalled when switch is turned ON
Solution Approach 1:
The patent implements preliminary action by saving the dimming level to memory immediately when the light switch is turned OFF. This ensures that the dimming information is preserved before the next switching cycle begins, allowing the bulb to recall and restore the previous dimming level automatically when the switch is turned ON again, creating a seamless user experience.
3Measurement precision
If a dedicated dimmer switch is required, then dimming control precision is improved, but compatibility with standard toggle switches is reduced
Solution Approach 1:
The LED bulb is designed with universal compatibility to work with both standard ON-OFF toggle switches and dedicated dimmer switches. The internal controller automatically detects which type of switch is being used and adjusts its operation mode accordingly, allowing the bulb to maintain precise dimming control whether used with a simple toggle or a specialized dimmer switch.
Solution Approach 2:
A smart controller chip serves as an intermediary that can interpret signals from both standard toggle switches and dedicated dimmer switches. When a standard toggle is detected, the controller translates its simple ON-OFF patterns into dimming sequences. When a dedicated dimmer is detected, the controller uses it directly for precise control, thus maintaining high dimming precision across different switch types.
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
Enables the LED bulb to retain the dimming level when the switch is turned OFF and automatically recall it when turned ON, providing seamless dimming control with any toggle AC mains light switch, enhancing compatibility and user convenience.
Implementation Method 1
an AC to DC converter
Implementation Method 2
a Microcontroller with Embedded Firmware to detect light switch switching patterns
Implementation Method 3
produce dimming patterns... The LED bulb begins at full brightness and dims to no light
Implementation Method 4
save the dim point in non-volatile EEPROM
Data Source
AI summary
A LED bulb contains a dimming circuit, powered and controlled by an ON-OFF light switch. The quickly done, OFF-ON is converted to a DC binary signal for the Microcontroller Embedded Firmware. Then the Bulb is put into Dimming Mode and the Microcontroller Firmware outputs a continuously pulsed signal, to the LED current control IC to set the current. This is duplicated in the Warm White LEDs to vary their brightness. The percentage ON time of the pulse gives the percentage brightness of the LEDs. A variety of dimming and brightening cycles are displayed using Microcontroller Firmware. Then turning OFF the switch will lock in the dim point. It is saved in non-volatile Microcontroller Embedded EEPROM. When OFF then wait more than 2.0 seconds and turn ON and the Bulb and it is in Normal Mode and displays the last saved dim point and operates as a regular LED Bulb.