Dynamic Voltage Adjustment for Display Luminance and Power
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Solution Overview
Problem
Conventional methods for setting voltage values in display devices result in excessive power consumption due to uniform voltage application across all devices, leading to inadequate luminance emission and potential defects, as individual display devices may have varying operational features.
Innovation Solution
A voltage value setting device and method that includes a test control unit and luminance measurement unit to dynamically adjust voltage values by providing temporary voltage values, measuring luminance, and applying margin or delta values to achieve desired luminance while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If voltage values are set using a large margin to ensure desired luminance emission, then luminance emission is improved, but power consumption increases excessively
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting voltage values based on measured luminance characteristics. The system measures actual luminance output and modifies voltage parameters (adding margin values only when needed) to achieve desired luminance emission while minimizing power consumption, rather than using fixed high-margin voltage settings for all devices.
Solution Approach 2:
The patent implements feedback by measuring the luminance output of individual display devices and using this measurement to determine appropriate voltage settings. The system continuously monitors luminance and adjusts voltage values accordingly, adding margin values only when luminance falls below thresholds, thereby optimizing the balance between luminance emission and power consumption.
2Device complexity
If the same voltage values are set for all display devices, then device complexity is reduced, but manufacturing precision deteriorates due to varying operational features
Solution Approach 1:
The patent applies local quality by setting voltage values individually for each display device based on its specific luminance characteristics. Instead of applying a uniform voltage setting across all devices, the system measures and adjusts voltage parameters locally for each device, ensuring optimal luminance performance while accounting for variations in operational features.
Solution Approach 2:
The patent implements dynamics by transitioning from static, uniform voltage settings to dynamic, adaptive voltage adjustment. The system measures luminance output and dynamically modifies voltage values for each device based on actual performance, allowing the voltage settings to adapt to individual device characteristics rather than remaining fixed.
Data Source
AI summary
A voltage value setting device including a test control unit which provides a temporary black grayscale voltage value and a temporary transistor off voltage value to a display device, and a luminance measurement unit which measures a luminance of a black grayscale that the display device displays based on the temporary black grayscale voltage value and the temporary transistor off voltage value. When the measured luminance of the black grayscale is lower than a black luminance threshold, the test control unit provides the display device with a black grayscale voltage value, set by adding a first margin value to the temporary black grayscale voltage value, and a transistor off voltage value, set by adding a second margin value to the temporary transistor off voltage value.