Display Panel Block Load Control for Power and Heat Management
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Solution Overview
Problem
Display panels experience increased power consumption and heat generation due to varying panel loads, which can lead to damage when load is concentrated on a single block, even if the total load is below the critical threshold.
Innovation Solution
A display device with a block load calculator determining maximum block loads and a power control mechanism that adjusts power distribution by generating different output image data and power control curves based on input image data and critical load thresholds to prevent excessive load on any single panel block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the luminances of the lights emitted by the pixels increase, then the brightness and visual quality improve, but the power consumption and heat generation increase
Solution Approach 1:
The display panel is divided into multiple panel blocks, and the load is analyzed and controlled at the block level rather than uniformly across the entire panel. This segmentation enables localized power management, allowing high luminance in specific blocks when needed while maintaining lower power consumption in other blocks, thus resolving the contradiction between brightness and power consumption.
Solution Approach 2:
Different power control strategies are applied to different panel blocks based on their specific load conditions. The first power control curve is generated for blocks with load below the critical threshold, while the second power control curve is generated for blocks with load at or above the critical threshold. This local differentiation allows optimal luminance performance where safe while preventing excessive power consumption where critical.
2Illumination intensity
If the panel load is concentrated to one panel block, then the local brightness can be enhanced, but the display panel may be damaged even when the total panel load is less than the critical panel load
Solution Approach 1:
The system continuously monitors the load of each panel block and uses this feedback to dynamically adjust the power control curves. When a block's load approaches or exceeds the critical threshold, the system generates appropriate power control curves to reduce the load in that block, preventing damage while maintaining overall display quality. This feedback mechanism ensures reliability while allowing local brightness enhancement when safe.
Solution Approach 2:
The system changes the power control parameters (first and second power control curves) based on the real-time load conditions of each panel block. By adjusting these parameters dynamically, the system can allow higher luminance in blocks with available capacity while strictly limiting luminance in blocks approaching critical load, thus resolving the contradiction between local brightness enhancement and panel safety.
3Manufacturing precision
If the driving currents increase to improve display quality, then the luminance and image quality improve, but the heat generation increases which can damage the display panel
Solution Approach 1:
The display panel is segmented into multiple blocks with independent load monitoring and power control. This allows the system to optimize driving currents for high display quality in blocks that can handle the load while using conservative driving currents in blocks approaching thermal limits, thus achieving good display quality overall while preventing excessive heat generation and panel damage.
Data Source
AI summary
A display device includes a display panel including a plurality of panel blocks, a block load calculator which calculates block loads of the panel blocks based on an input image data and determines a maximum block load among the block loads, a block load comparing part which generates a first output image data based on the input image data when the maximum block load is less than a critical block load, and a first load controller which generates a first power control curve and generates a second output image data based on the input image data when the maximum block load is greater than or equal to the critical block load.