Dynamic Voltage OLED Driver for Temperature-Stable Color Output
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OLED displays suffer from color variations due to temperature changes, which are not adequately addressed by prior art, leading to undesirable color variance and increased power consumption.
Innovation Solution
A dynamic voltage display driver adjusts driving voltage based on temperature sensors and a dynamic vapor chamber adjusts thermal energy distribution to maintain color uniformity and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If OLED displays operate at constant voltage, then power consumption is reduced, but color uniformity deteriorates due to temperature variations
Solution Approach 1:
The patent implements dynamic voltage adjustment based on real-time temperature sensing. The display driver continuously monitors temperature at multiple locations across the OLED panel and dynamically modifies the driving voltage accordingly. This dynamic approach allows the system to maintain color uniformity by compensating for temperature-induced luminance changes while optimizing power consumption based on actual thermal conditions rather than operating at fixed constant voltage.
Solution Approach 2:
The patent employs temperature sensors positioned at multiple locations across the display to provide real-time feedback on temperature distribution. This feedback loop enables the display driver to detect temperature variations, determine their impact on color uniformity, and adjust driving parameters accordingly. The feedback mechanism ensures that voltage adjustments are made based on actual thermal conditions, balancing color uniformity maintenance with power consumption optimization.
2Manufacturing precision
If temperature sensors are added to monitor display temperature, then color uniformity is improved, but device complexity increases
Solution Approach 1:
The patent places temperature sensors at specific strategic locations across the OLED display rather than uniformly distributing them. This localized sensor placement targets areas most critical for color uniformity, such as regions with highest heat generation or greatest temperature gradients. By concentrating sensing capability where it matters most, the system achieves effective temperature monitoring and color compensation while minimizing the total number of sensors and associated complexity.
Solution Approach 2:
The patent integrates temperature sensing functionality directly into the display driver circuitry, combining the temperature monitoring function with the existing voltage control and signal processing functions. This merging approach allows the display driver to simultaneously perform image processing, voltage regulation, and temperature-based compensation without requiring separate dedicated temperature control hardware, thereby reducing overall device complexity while maintaining effective color uniformity control.
3Manufacturing precision
If dynamic voltage adjustment is implemented, then color uniformity is improved, but power consumption increases
Solution Approach 1:
The patent dynamically changes the driving voltage parameter based on real-time temperature measurements. By adjusting voltage as a function of temperature, the system compensates for temperature-induced color shifts and maintains luminance uniformity across the display. This parameter adjustment approach ensures that voltage is optimized for each thermal condition, preventing excessive power consumption while achieving color uniformity through physics-based compensation rather than brute-force power increases.
Solution Approach 2:
The patent replaces mechanical or passive thermal management approaches with an electronic control approach. Instead of relying on passive heat dissipation or active cooling mechanisms that would add complexity and energy consumption, the system uses electronic voltage adjustment to compensate for thermal effects. This substitution allows the system to address color uniformity issues through electrical parameter modification rather than mechanical thermal intervention, optimizing the balance between power consumption and color uniformity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures consistent color output across OLED displays by dynamically adjusting voltage and thermal management, minimizing color variance and power consumption.
Implementation Method 1
a dynamic vapor chamber including one or more valves between heat-generating components of the computing device and the display
Implementation Method 2
vapor chamber controller to selectively actuate the one or more valves to affect the detected temperatures of the display
Data Source
Figure 1
Figure 2
Figure 3
AI summary
OLED display color output may vary substantially as a function of display temperature, which changes over time. Luminance of each of the pixels is defined by the current flowing therethrough, which is a function of the applied voltage and resistivity of the pixels. Temperature affects the resistivity of the pixels and thus the current flowing therethrough if voltage is held constant. The temperature response of red, green, and blue pixels differs, particularly at low applied voltage levels. As a result, the relative luminance of red, green, blue may vary with temperature changes, which may yield an undesirable overall color variance. The presently disclosed systems and methods dynamically adjust driving voltage to maintain color quality within a desired specification, while also reducing (or in some implementations, minimizing) power consumption of the OLED display.