OLED Power Voltage Control for Battery and Ambient Light Adaptation
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Solution Overview
Problem
Organic electroluminescent display devices face challenges in efficiently managing power consumption and maintaining image quality due to variations in battery voltage, ambient light, and temperature, leading to potential image quality degradation and increased power usage.
Innovation Solution
The method involves detecting battery voltage, ambient light, and temperature to control the brightness and voltage difference between power voltages supplied to pixels, using a combination of automatic brightness control (ABC), automatic current limit (ACL), and temperature-based adjustments to optimize power usage and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brightness and power voltage are maintained at high levels, then image quality is preserved, but power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of power voltages (ELVDD and ELVSS) and brightness levels based on real-time detection of ambient light conditions, battery voltage, and temperature. The system transitions from static high-level maintenance to dynamic adaptation, optimizing the balance between image quality and power consumption under varying environmental conditions.
Solution Approach 2:
The system changes operating parameters (power voltages, brightness levels) based on detected environmental factors. By adjusting voltage differences and brightness dynamically rather than maintaining fixed high levels, the system resolves the contradiction between preserving image quality and reducing power consumption.
2Reliability
If power voltage difference is increased to maintain image quality, then display performance is improved, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts the power voltage difference (between ELVDD and ELVSS) based on environmental conditions and image data characteristics. Instead of maintaining a consistently high voltage difference, the system adapts the voltage parameters to match actual display requirements, reducing energy loss while preserving display performance.
Solution Approach 2:
The system applies voltage difference adjustment selectively based on actual needs detected through environmental sensing and image analysis. Rather than applying excessive voltage continuously, the system uses partial adjustment only when necessary to maintain display performance, thereby reducing overall power consumption.
3Use of energy by moving object
If brightness is reduced to save power, then power consumption decreases, but image quality deteriorates
Solution Approach 1:
The system dynamically adjusts brightness levels based on ambient light detection and other environmental factors. Rather than uniformly reducing brightness to save power, the system optimizes brightness parameters according to actual viewing conditions, maintaining image quality when necessary while reducing power consumption when appropriate.
Solution Approach 2:
The patent implements a feedback mechanism where ambient light sensors, temperature sensors, and battery voltage detectors provide real-time information to the control system. This feedback enables intelligent brightness adjustment that maintains image quality while optimizing power consumption based on actual environmental conditions.
4Adaptability or versatility
If multiple detection and control units are added, then power management capability is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple detection functions (ambient light sensing, temperature sensing, battery voltage detection) and control operations into a unified power management system. The controller performs multiple functions including environmental monitoring, voltage regulation, and brightness control, reducing overall device complexity while improving power management capability.
Solution Approach 2:
The system merges detection units and control functions into an integrated power management architecture. By combining ambient light detection, temperature detection, voltage control, and brightness adjustment into a coordinated system, the patent improves adaptability without proportionally increasing device complexity.
Data Source
AI summary
A method and system for controlling power consumption of a display is disclosed. The method includes determining battery voltage, brightness of ambient light, temperature, and adjusting the brightness of the organic electroluminescent display apparatus, or by adjusting the voltage difference between a first power voltage and a second power voltage of the organic electroluminescent display apparatus, according to the battery voltage, the brightness of the ambient light, the temperature, and image data of the organic electroluminescent display apparatus.