OLED Brightness Stabilization via Temperature-Adjusted Driving Voltage
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Solution Overview
Problem
Temperature changes within head-mounted VR devices using OLED displays cause significant variations in brightness performance, leading to gamma variations and noise in dark gray scales, affecting image quality.
Innovation Solution
A head-mounted display device equipped with a temperature sensor and a controller that adjusts the display driving voltage based on temperature changes to maintain consistent brightness performance, using a microcontroller to output image data and adjust the driving voltage for the OLED display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If OLED display is used in head-mounted VR device, then immersion display performance is improved, but brightness performance varies significantly with temperature changes
Solution Approach 1:
The patent implements a feedback mechanism where a temperature sensor continuously monitors the OLED display temperature, and the controller adjusts the driving voltage based on the detected temperature to maintain stable gamma values and brightness performance across temperature variations
Solution Approach 2:
The patent dynamically changes the driving voltage parameter of the OLED display based on temperature conditions. By adjusting the voltage according to temperature sensor readings, the system compensates for temperature-induced brightness variations and maintains consistent gamma values
2Duration of action of moving object
If temperature rises in head-mounted device, then device operation continues, but dark gray scale brightness increases causing noise and loss of detail
Solution Approach 1:
The temperature sensor provides continuous feedback on device temperature, enabling the controller to detect temperature rises and adjust the driving voltage accordingly to prevent gray scale precision degradation and noise in dark regions
Solution Approach 2:
The system takes preliminary anti-action by proactively adjusting the driving voltage before significant gray scale distortion occurs. When temperature rise is detected, the voltage is adjusted in advance to compensate for upcoming brightness shifts in dark gray scales
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 solution effectively stabilizes gamma values, reducing noise in dark gray scales and maintaining image quality across temperature fluctuations, ensuring consistent brightness and improved user experience in virtual reality applications.
Implementation Method 1
The first temperature sensor is disposed within the head-mounted display device and is configured to sense the first device temperature of the first OLED display
Implementation Method 2
Organic Light-Emitting Diode (OLED) displays are commonly used in VR devices
Implementation Method 3
The brightness of the OLED display is controlled by the voltage
Data Source
AI summary
The present disclosure provides a head-mounted display device including a first OLED display, a first temperature sensor, and a controller. The first OLED display is configured to display image data. The first temperature sensor is disposed within the head-mounted display device and is configured to sense the first device temperature of the first OLED display. The controller is electrically connected to the first OLED display and the first temperature sensor. The controller outputs the image data and a first display driving voltage to the first OLED display. The controller adjusts the first display driving voltage to control the brightness performance of the first OLED display according to the change of the first device temperature.