Power Voltage Generator Switch Electrode Current Sensing
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Solution Overview
Problem
Existing display devices face challenges in reducing manufacturing costs and power consumption due to the need for large sensing resistors and ICs for current sensing, which result in heat generation, voltage drop, and increased power consumption.
Innovation Solution
A power voltage generator that includes a booster, voltage sensor, constant voltage controller, and constant current controller, which senses signals at the electrode of a switch to operate constant current control, eliminating the need for large sensing resistors and ICs by using a booster with an inductor and diodes, and a signal smoothing circuit to convert pulse width modulation signals to direct current signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large sensing resistors and ICs are used for current sensing, then current detection precision is improved, but heat generation increases and power consumption increases
Solution Approach 1:
The patent extracts the current sensing function from the traditional large sensing resistor and IC configuration, and relocates it to the switch component itself. The switch's on-off state directly reflects the current status, eliminating the need for separate sensing resistors and reducing heat generation while maintaining detection precision.
Solution Approach 2:
The switch component is given multiple functions: it serves both as the switching element for voltage boosting and as the sensing element for current detection. By utilizing the switch's inherent on-off state to indicate current status, the system eliminates dedicated sensing components, reducing overall complexity and heat generation.
2Measurement precision
If large sensing resistors and ICs are used for current sensing, then current detection precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent removes the expensive large sensing resistors and IC components from the current sensing circuit, replacing them with the switch component that is already present in the voltage boosting circuit. This extraction of the sensing function to an existing component significantly reduces manufacturing costs while maintaining detection capability.
Solution Approach 2:
The switch component performs dual functions as both the voltage boosting switch and the current sensing element. This multi-functionality eliminates the need for separate expensive sensing components, thereby reducing manufacturing costs while preserving current detection precision.
3Measurement precision
If large sensing resistors are used for current sensing, then current detection precision is improved, but voltage drop increases
Solution Approach 1:
The patent extracts the sensing function from large sensing resistors that cause voltage drop, and implements it through the switch component instead. The switch's on-off state provides current information without introducing significant voltage drop, thereby maintaining detection precision while reducing energy loss.
4Measurement precision
If large sensing resistors and ICs are used for current sensing, then current detection precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the current sensing function from complex IC-based solutions and large resistor networks, and implements it through the simple on-off state of the switch component. This extraction significantly reduces device complexity while maintaining the ability to detect current status with sufficient precision.
Solution Approach 2:
The switch component serves dual purposes as both the voltage boosting element and the current sensing element. This multi-functionality eliminates the need for separate sensing ICs and complex resistor networks, thereby reducing device complexity while preserving current detection capability.
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
This solution reduces manufacturing costs and prevents heat generation, voltage drop, and increased power consumption by enabling constant current control without large sensing resistors and ICs, improving the efficiency of the display device.
Implementation Method 1
a booster configured to boost an input voltage to an output voltage based on an on-off operation of a switch
Implementation Method 2
a voltage sensor configured to generate a sensing voltage by sensing the output voltage
Implementation Method 3
a signal smoothing circuit to convert pulse width modulation signals to direct current signals
Data Source
AI summary
A power voltage generator includes a booster, a voltage sensor, a constant voltage controller and a constant current controller. The booster is configured to boost an input voltage to an output voltage based on an on-off operation of a switch. The voltage sensor is configured to generate a sensing voltage by sensing the output voltage. The constant voltage controller is configured to generate a first switching signal to control the switch by comparing the sensing voltage with a reference voltage. The constant current controller is configured to generate a gain based on a ratio of an electrode signal of the switch and a target signal by comparing the electrode signal of the switch with the target signal.