Display Panel DC-DC Converter Without a Voltage-to-Current Stage
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Solution Overview
Problem
Existing DC-DC converters for display panel driving apparatuses require significant area and consume power due to the inclusion of voltage-to-current converters, which increases power consumption and occupies valuable space.
Innovation Solution
A DC-DC converter design that eliminates the voltage-to-current converter by incorporating a slope compensation circuit, current sensing circuit, and an adder with a sensing resistor and switch, allowing for slope compensation and current sensing without the need for a separate voltage-to-current conversion circuit, thereby reducing area and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a voltage-to-current converter is included in the DC-DC converter, then current conversion function is achieved, but area occupied and power consumption increase
Solution Approach 1:
The patent extracts and eliminates the separate voltage-to-current converter from the DC-DC converter circuit. By removing this dedicated conversion stage, the circuit area occupied by the voltage-to-current converter is reduced, while the current conversion function is achieved through alternative circuit configurations involving the adder, slope compensation circuit, and current sensing circuit.
Solution Approach 2:
The patent merges the voltage-to-current conversion function with other circuit components. The adder circuit, slope compensation circuit, and current sensing circuit are integrated to perform both voltage addition and current conversion functions simultaneously, eliminating the need for a separate voltage-to-current converter and reducing overall circuit area.
2Reliability
If a voltage-to-current converter is included in the DC-DC converter, then current conversion function is achieved, but power consumption increases
Solution Approach 1:
The patent extracts and eliminates the separate voltage-to-current converter from the DC-DC converter circuit. By removing this dedicated conversion stage, power consumption associated with the voltage-to-current converter is reduced, while the current conversion function is achieved through alternative circuit configurations.
Solution Approach 2:
The patent merges the voltage-to-current conversion function with other circuit components. The adder circuit, slope compensation circuit, and current sensing circuit are integrated to perform both voltage addition and current conversion functions simultaneously, reducing the power consumption required for voltage-to-current conversion.
3Measurement precision
If slope compensation and current sensing are performed separately, then accurate control is achieved, but device complexity increases
Solution Approach 1:
The patent merges slope compensation and current sensing functions into a single integrated adder circuit. The adder receives both the slope voltage from the slope compensation circuit and the sensing current from the current sensing circuit, combining multiple functions into one component to reduce overall device complexity while maintaining measurement precision.
Solution Approach 2:
The adder circuit is designed to perform multiple functions simultaneously: it adds the slope voltage and sensing current, performs slope compensation, and enables current sensing. This multi-functionality reduces the number of separate components needed, thereby reducing device complexity while maintaining accurate control.
Data Source
AI summary
According to one embodiment of the present disclosure, there is provided a DC-DC converter including a slope compensation circuit configured to generate a sawtooth-shaped compensation ramp wave to output a slope voltage, a current sensing circuit configured to receive and convert a sensing current to output the converted current, and an adder configured to receive the slope voltage and the sensing current, wherein the adder includes a sensing resistor and a sensing switch, one end of the sensing resistor is connected to the current sensing circuit and the other end of the sensing resistor is connected to the sensing switch and the slope compensation circuit, and one end of the sensing switch is connected to the sensing resistor and the slope compensation circuit and the other end of the sensing switch is connected to the ground.