OLED Display Peak Luminance Control via Image Contrast Analysis
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Solution Overview
Problem
Conventional peak luminance control methods for OLED displays do not consider environmental factors such as contrast, ambient light, and temperature, leading to decreased image visibility and quality.
Innovation Solution
A display device that adaptively controls peak luminance based on image contrast and load, using an image analyzer to calculate contrast and load from RGB image data, and an image processor to apply a peak control coefficient to adjust luminance, with additional considerations for ambient light and temperature through sensors and controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional PLC driving method is used to control peak luminance, then power consumption is reduced, but image visibility and quality deteriorate
Solution Approach 1:
The patent implements dynamic peak luminance control by continuously monitoring image characteristics (contrast ratio, average grayscale level, peak grayscale level) and adjusting the peak luminance control coefficient in real-time. This dynamic adjustment allows the system to optimize between power consumption and image quality based on actual display conditions, rather than using a fixed reduction approach.
Solution Approach 2:
The patent changes multiple parameters simultaneously including contrast ratio, average grayscale level, peak grayscale level, and peak luminance control coefficient. By analyzing these parameters and their relationships, the system determines the appropriate peak luminance control coefficient to apply, enabling adaptive optimization of both power efficiency and image quality.
2Loss of energy
If peak luminance is reduced to save power, then power consumption decreases, but image visibility in varying environments deteriorates
Solution Approach 1:
The patent employs feedback mechanisms by continuously analyzing image characteristics and using this information to adjust the peak luminance control coefficient. The system monitors the contrast ratio, average grayscale level, and peak grayscale level of displayed images, and uses this feedback to dynamically optimize peak luminance control, ensuring adaptability to varying image content and environmental conditions.
Solution Approach 2:
The system dynamically adjusts peak luminance control based on real-time analysis of image characteristics including contrast ratio, average grayscale level, and peak grayscale level. This dynamic adaptation enables the display to maintain optimal visibility across varying environmental conditions while managing power consumption effectively.
3Loss of energy
If fixed peak luminance control is applied, then power consumption is managed, but image quality deteriorates due to lack of environmental adaptation
Solution Approach 1:
The patent analyzes multiple image parameters including contrast ratio, average grayscale level, and peak grayscale level to determine the appropriate peak luminance control coefficient. By changing and analyzing these parameters dynamically, the system achieves precise control over image quality while managing power consumption, avoiding the quality deterioration associated with fixed control approaches.
Solution Approach 2:
The system implements dynamic peak luminance control that adapts to varying image characteristics and environmental conditions. By continuously adjusting the peak luminance control coefficient based on real-time analysis of image parameters, the system maintains high image quality while effectively managing power consumption, unlike fixed control methods that compromise quality.
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
Improves image visibility, reality, and immersion by dynamically adjusting peak luminance, reducing image deterioration and enhancing display quality in varying conditions.
Implementation Method 1
This light is generated in the organic layer via the combination of holes supplied from an anode and electrons supplied from a cathode
Data Source
AI summary
A display device according to example embodiments includes an image analyzer configured to calculate contrast and load of an image of a frame based on R, G, and B image data input corresponding to the frame, an image processor configured to control a peak control coefficient applied to W image data to adaptively control peak luminance based on the contrast and the load, and to respectively generate R′, G′, and B′ image data by subtracting a product of the W image data and the peak control coefficient from each of the R, G, and B image data, a display panel including a plurality of pixels, a data driver configured to generate a data signal based on the R′, G′, B, and W image data, and to provide the data signal to the display panel, and a scan driver configured to provide a scan signal to the display panel.