Compensation Lookup Table Tuning for Display Luminance Under Rush Power Limits
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Solution Overview
Problem
Conventional display apparatuses experience a decrease in luminance due to the operation of the net power controller, which does not account for peak gain setting values, leading to reduced current and potential display panel damage.
Innovation Solution
A compensation lookup table generator that includes a maximum power voltage determiner, rush power reduction amount operator, and allowable current increase amount operator, which modify the lookup table to increase current and luminance by determining and adjusting power voltage based on peak gain setting values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the net power controller operates with a conventional lookup table that does not consider peak gain setting values, then power consumption is reduced, but luminance decreases and display panel damage may occur
Solution Approach 1:
The patent implements dynamic adjustment of the lookup table based on peak gain setting values. The compensation lookup table generator dynamically modifies the conventional lookup table by calculating rush power reduction amounts and allowable current increase amounts according to the current peak gain setting value, enabling the system to adaptively balance power consumption and luminance output rather than using a static lookup table
Solution Approach 2:
The patent changes the parameters of the lookup table based on peak gain setting values. By calculating the rush power reduction amount and allowable current increase amount as functions of the peak gain setting value, the system modifies the scale factors in the lookup table to compensate for luminance loss while maintaining power consumption benefits
2Power
If the peak gain setting value is decreased to reduce rush power, then power consumption is reduced, but luminance and display quality deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the compensation lookup table generator continuously monitors the peak gain setting value and adjusts the lookup table accordingly. By calculating the rush power reduction amount based on the current peak gain setting value and applying compensation through modified scale factors, the system creates a closed-loop control that maintains luminance while respecting power constraints
Solution Approach 2:
The compensation lookup table acts as an intermediary between the peak gain setting value and the final luminance output. It translates the power reduction requirements into adjusted scale factors that compensate for luminance loss, serving as a mediator that reconciles the conflicting requirements of power consumption and display quality
3Illumination intensity
If the current is increased to maintain luminance, then display quality is improved, but power consumption increases and may exceed rush power limits
Solution Approach 1:
The patent applies partial compensation rather than full compensation for rush power reduction. By calculating the allowable current increase amount as a portion of the rush power reduction amount (multiplied by a coefficient less than or equal to 1), the system achieves partial luminance recovery while maintaining power consumption within acceptable limits, rather than attempting to fully restore original luminance levels
Data Source
AI summary
A compensation lookup table generator includes a maximum power voltage determiner, a rush power reduction amount operator, an allowable current increase amount operator and a lookup table modifier. The maximum power voltage determiner is configured to determine a maximum power voltage based on a first lookup table, a peak gain setting value and a power voltage curve. The rush power reduction amount operator is configured to operate a rush power reduction amount based on the maximum power voltage and a rush power limit. The allowable current increase amount operator is configured to operate an allowable current increase amount based on the maximum power voltage and the rush power reduction amount. The lookup table modifier is configured to generate a second lookup table by modifying the first lookup table based on the peak gain setting value and the allowable current increase amount.