Multi-Level Display Driving Voltage for Heat-Stable Image Output
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Solution Overview
Problem
As display resolution and peak luminance increase in image display apparatuses, they consume more power, leading to reliability issues such as increased heat generation and potential burn-out of circuit elements, especially when the display driving voltage is constant.
Innovation Solution
An image display apparatus that includes a power supply capable of outputting multiple display driving voltages based on different modes, using a converter with a transformer and multi-level voltage output circuit, along with a voltage detector and switching controller to adjust the voltage levels, thereby reducing heat generation and stabilizing image display across various modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If display resolution and peak luminance are increased, then image quality is improved, but power consumption and heat generation increase
Solution Approach 1:
The power supply system dynamically adjusts the display driving voltage based on the operating mode (Eco, Standard, Cinema, HDR) to optimize the balance between luminance output and heat generation. By varying the voltage level according to mode requirements, the system achieves high peak luminance when needed while reducing heat generation during normal operation.
Solution Approach 2:
The patent changes the display driving voltage parameter across different operating modes. The power supply outputs different voltage levels (first level for Eco mode, second level for Standard/Cinema mode, third level for HDR mode), thereby adjusting the operational parameters of the display to achieve optimal performance while controlling heat generation.
2Illumination intensity
If display driving voltage is increased to improve image quality, then peak luminance is improved, but heat generation and reliability issues worsen
Solution Approach 1:
The system dynamically selects appropriate voltage levels based on the required display mode. Rather than continuously operating at high voltage, the power supply adjusts to the minimum necessary voltage for each mode, thereby maintaining reliability while achieving peak luminance only when required by the display mode.
3Device complexity
If constant display driving voltage is used, then device complexity is reduced, but the ability to adapt to different modes and reduce heat generation is limited
Solution Approach 1:
The power supply is designed with multi-functionality to serve different display modes (Eco, Standard, Cinema, HDR) by outputting different voltage levels. This universal design allows a single power supply circuit to adapt to various operational requirements without requiring separate power supply systems for each mode.
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 effectively reduces heat generation and stabilizes image display by supplying appropriate display driving voltages in different modes, enhancing the reliability and performance of the image display apparatus.
Implementation Method 1
a converter to convert an input voltage to output a DC voltage, wherein the converter includes a transformer
Data Source
AI summary
An image display apparatus including a display; a signal processing device to output an image signal to the display; and a power supply 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 output a display driving voltage of a third level higher than the second level based on a third mode.