Display Pixel Voltage Control for Luminance-Based Power Reduction
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption, particularly in optimizing the voltage levels for pixels based on luminance and environmental conditions, leading to inefficient energy usage.
Innovation Solution
A display device with a driver that determines voltage levels for pixels based on luminance and environmental factors using lookup tables and sensors, adjusting voltages like second power voltage, initialization voltages, and low voltages to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If voltage levels are fixed for all operating conditions, then device complexity is reduced, but power consumption cannot be optimized
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing optimal voltage level combinations in lookup tables before operation. The driver circuit queries these pre-prepared voltage settings based on sensed luminance and temperature conditions, avoiding real-time complex calculations while achieving optimized power consumption across different operating conditions.
Solution Approach 2:
The patent replaces complex real-time voltage optimization calculations with a lookup table query system. Instead of performing mechanical/computational optimization algorithms during operation, the system substitutes this with table-based retrieval of pre-computed voltage settings, significantly reducing computational complexity while maintaining power optimization benefits.
2Use of energy by moving object
If voltage levels are dynamically adjusted based on luminance and temperature, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent implements dynamics by enabling the voltage generator to dynamically adjust voltage levels in response to changing luminance and temperature conditions. Sensors continuously monitor environmental parameters, and the driver circuit queries the lookup table to retrieve appropriate voltage settings, allowing the system to adapt its power consumption characteristics to match actual operating conditions.
Solution Approach 2:
The patent applies feedback by using sensors to continuously monitor luminance and temperature conditions, then using this feedback information to query the lookup table and adjust voltage levels accordingly. This closed-loop feedback mechanism ensures that voltage optimization remains synchronized with actual environmental conditions, maintaining power efficiency throughout operation.
3Use of energy by moving object
If multiple voltage levels are used for different pixel operations, then power consumption is optimized, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by varying voltage levels across different pixel operations (initialization, data writing, emission control) and different operating conditions (luminance and temperature). The lookup table stores multiple voltage level combinations, allowing the system to select appropriate parameters for each specific operation and condition, optimizing power consumption while managing precision requirements through pre-calibrated settings.
Data Source
AI summary
A display device includes: a display panel including a pixel, a voltage generator configured to generate a plurality of driving voltages for operating the pixel, and a driver configured to generate a data signal transmitted to the pixel, and to determine each of voltage levels of a second power voltage, a first initialization voltage, a second initialization voltage, and a first low voltage among the plurality of driving voltages based on a luminance level of an image displayed by the display panel, and the voltage generator is configured to generate the determined second power voltage, first initialization voltage, second initialization voltage, and first low voltage.