Load-Adaptive Display Power Supply for Driving Reliability
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption and preventing driving failure due to voltage levels in overload conditions.
Innovation Solution
A display device with a power supply unit that adjusts power voltage based on the load level of the driving unit, using a power management circuit to control the power voltage through a power unit with switches and an inductor, and a duty cycle adjustment mechanism to optimize voltage output according to load size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed high power voltage is supplied to the driving unit, then the display device can operate reliably under maximum load, but power consumption increases unnecessarily under low load conditions
Solution Approach 1:
The power supply unit dynamically adjusts the power voltage level based on the load level of the driving unit. When the load level is low, the power voltage is reduced to minimize power consumption. When the load level is high or maximum, the power voltage is increased to ensure reliable operation. This dynamic adjustment resolves the contradiction between maintaining driving reliability and reducing power consumption under varying load conditions.
Solution Approach 2:
The invention changes the voltage parameter of the power supply based on load conditions. The power supply unit varies the output voltage level according to the detected load level, transitioning between different voltage states (e.g., first voltage level for low load, second voltage level for high load). This parameter change allows the system to optimize power consumption while maintaining sufficient voltage for reliable driving across different operational states.
2Adaptability or versatility
If a fixed high power voltage is supplied to the driving unit, then the display device can operate under all load conditions, but driving failure may occur due to voltage levels in the overload band
Solution Approach 1:
The power supply unit dynamically adjusts the power voltage based on the load level to keep the operating point within the safe operating area. By detecting the load level and相应地 adjusting the voltage, the system adapts to different load conditions without entering the overload voltage band, thus preventing driving failure while maintaining operational versatility across different scenarios.
Solution Approach 2:
The system implements feedback control where the load level of the driving unit is detected and used to adjust the power voltage output. This feedback mechanism ensures that the voltage remains appropriate for the current load condition, preventing the voltage from entering the harmful overload band while still providing sufficient voltage for various operational requirements, thereby maintaining both adaptability and driving stability.
3Reliability
If the power voltage is increased to prevent driving failure, then driving reliability improves, but power consumption increases
Solution Approach 1:
The invention changes the voltage parameter dynamically based on load requirements. Instead of maintaining a fixed high voltage that ensures reliability but causes energy loss, the system adjusts the voltage parameter to match the actual load level. This results in lower voltage and energy consumption during low-load operation while maintaining sufficient voltage for reliability during high-load operation, thus resolving the contradiction between reliability and energy loss.
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 reduces power consumption by optimizing voltage supply and prevents driving failure by customizing voltage levels to match load conditions, enhancing efficiency and reliability.
Implementation Method 1
a power unit configured to generate power voltage using input voltage supplied to an input unit thereof and output the generated power voltage to an output terminal
Data Source
AI summary
Provided is a display device. The display device includes a display panel configured to display an image; a driving unit including a data driver and a gate driver for driving the display panel; and a power supply unit configured to supply a power voltage for driving the driving unit using an input voltage; wherein the power supply unit controls the power voltage according to a load level of the driving unit.