Power Management Circuit Adaptation for Display Driving Voltage
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Solution Overview
Problem
Conventional power management circuits have a narrow input voltage range, limiting their use in multiple display modes and increasing costs due to the need for separate PMICs for different display devices, such as TV and business screens, and inefficient power consumption during shutdown processes.
Innovation Solution
A display driving system comprising a power management circuit and a timing circuit, where the power management circuit selects a working mode based on a predetermined command from the timing circuit, allowing it to operate within a broader input voltage range by using threshold voltages to adjust output voltages and manage power consumption effectively across different display modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the input voltage range of the PMIC is directly adjusted to be larger, then the PMIC can be used in different display devices, but when the input voltage reduces in a shut-down process, the PMIC still works and thus the power consumption of the chip increases
Solution Approach 1:
The PMIC dynamically adjusts its working state based on the input voltage level. During normal operation, it processes the full input voltage range. During shut-down process, it detects the voltage reduction and transitions to a low-power state, dynamically adapting its operation mode to match the system state and avoid unnecessary power consumption.
Solution Approach 2:
The patent changes the operational parameters of the PMIC based on input voltage conditions. By monitoring input voltage levels and adjusting working parameters accordingly, the PMIC maintains broad voltage compatibility while optimizing power consumption in different operational phases, particularly during shut-down when voltage sags occur.
2Reliability
If separate PMICs are used for TV display screen and business display screen, then each device can have optimized voltage range, but the cost increases
Solution Approach 1:
The PMIC is designed with universal functionality to serve multiple display device types. By incorporating broad voltage range support and adaptive working modes, a single PMIC design can be used across different product lines (TV displays, business displays, etc.), eliminating the need for device-specific PMIC variants and reducing manufacturing complexity and cost.
Solution Approach 2:
The PMIC uses parameter adjustment mechanisms to adapt to different display device requirements. By changing operational parameters based on detected input voltage levels and device type, a single PMIC hardware design achieves what would otherwise require multiple specialized designs, reducing overall manufacturing cost while maintaining optimized performance for each device category.
Data Source
AI summary
An electronic equipment and a display driving system are provided. The display driving system includes a power management circuit and a timing circuit electrically connected to the power management circuit. The power management circuit receives an input voltage and output a working voltage according to the input voltage. The timing circuit receives the working voltage and output a predetermined command to the power management circuit. The power management circuit is further configured to select a predetermined working mode according to the predetermined command such that the power management circuit works in the predetermined working mode.