Display Power Converter Control for Heat-Aware Voltage Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As display resolution and peak luminance increase in image display apparatuses, the power consumption and heat generation in circuit elements, particularly in converters, also rise, especially when the display driving voltage levels change.
Innovation Solution
The image display apparatus includes a converter that outputs different display driving voltage levels based on modes and adjusts the reference level for overcurrent protection accordingly, using a transformer, switching elements, a resonant capacitor, and inductor, and a switching controller to manage these operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display driving voltage level is increased to improve display resolution and peak luminance, then the image quality is improved, but heat generation in circuit elements increases
Solution Approach 1:
The patent applies dynamics by making the overcurrent protection reference level variable rather than fixed. The switching controller dynamically adjusts the reference level based on the operating mode (first mode or second mode) to match the actual current characteristics at different voltage levels, allowing the system to operate at higher voltages for improved luminance while preventing excessive heat generation through adaptive current limiting
Solution Approach 2:
The patent changes the parameter of overcurrent protection reference level based on operating conditions. When the display driving voltage is at a higher level (second mode), the reference level is increased accordingly, while at lower voltage levels (first mode), a lower reference level is used. This parameter adaptation allows the system to maintain optimal performance across different voltage conditions without excessive heat generation
2Adaptability or versatility
If the display driving voltage level changes frequently to adapt to different display modes, then the adaptability is improved, but heat generation in converter circuit elements increases
Solution Approach 1:
The system dynamically switches between first and second modes depending on display requirements, with the switching controller adjusting the overcurrent protection reference level accordingly. This dynamic adaptation allows the converter to efficiently handle different voltage levels without generating excessive heat during mode transitions
Solution Approach 2:
The converter is designed to universally handle multiple operating modes (first mode and second mode) with a single circuit configuration. The switching controller provides multi-functional overcurrent protection by selecting appropriate reference levels based on the current operating mode, enabling the same hardware to adapt to various display requirements without additional circuitry that would increase heat generation
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 effectively reduces heat generation in circuit elements within the converter, even when the display driving voltage levels change, thereby improving the reliability and efficiency of the image display apparatus.
Implementation Method 1
a transformer
Implementation Method 2
a resonant capacitor
Implementation Method 3
a resonant inductor
Data Source
AI summary
The present disclosure relates to an image display apparatus. The image display apparatus according to an embodiment of the present disclosure includes: a display; a signal processing device configured to output an image signal to the display; and a power supply including a converter configured to supply a display driving voltage to the display, wherein the converter is configured to: output a display driving voltage of a first level based on a first mode; output a display driving voltage of a second level higher than the first level based on a second mode; and change a reference level for overcurrent protection based on the first mode or the second mode. Accordingly, heat generated by circuit elements in the converter may be reduced.